JPH0434209Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention is directed to a boundary line constructed prior to the foundation work of a house or a line 10 mm to 400 mm from an adjacent building (hereinafter simply referred to as a boundary line). Related to various types of long-leg wall pieces (18 m to 25 m) for retaining earth, such as long-leg connecting walls, long-leg connections, or long-leg stacked walls, and connection devices equipped with connecting fittings and retaining walls that connect these long-leg wall pieces. It is.

``Prior art'' Conventionally, various types of earth retaining walls constructed by connecting long wall pieces of this kind have generally been constructed at a distance of about 100 mm or more from the boundary line.
The continuous wall construction is completed by driving H steel, sheet piles, etc. at 200mm intervals using a pile driver, etc.

Then, the foundation work will be done at intervals of approximately 200mm to 300mm.

After this foundation work is completed, when it is solidified or completed, the continuous wall equipment such as the H steel and sheet piles is pulled out, and the continuous wall work is finally completed.

Other technical documents related to this include the excavator disclosed in the rotary cutter type excavator of Japanese Patent Publication No. 49-761 and the excavation method using a rotary cutter type excavator of Japanese Patent Publication No. 49-5402. The excavator is composed of a casing, a slide cutter provided at the lower end of the casing and on a side plate, and a pair of rotary cutters having a large number of claws provided inside the slide cutter and the casing.

There is also a continuous wall band excavator disclosed in Japanese Patent Publication No. 43-28150.
It is composed of a bucket protruding from the lower end of this prevention plate, a blade-shaped portion provided at the lower end, and a rear collapse prevention plate provided at the rear of the traveling member in the traveling direction.

In addition, there are documents such as Japanese Patent Application Laid-Open No. 79109/1983 as a sheet pile construction method that allows sheet piles to be constructed in any location or ground without moving the construction heavy machinery or in the vicinity of existing buildings.

``Problem that the idea aims to solve'' According to the conventional continuous wall construction method, as mentioned above, foundation work can only be done approximately 400mm to 500mm from the boundary line, and these days there is a call for effective use of land. That there is a problem.

Moreover, the above-mentioned technical literature certainly shows that a continuous wall is constructed. However, in both documents, the bucket belt, which is the main part of the excavator, is large in the longitudinal direction (in the forward direction of the excavator) of the side plate (side collapse prevention plate).
Or, because it is relatively small and does not protrude in the width direction, large earth pressure resistance is applied to the excavator body, and it is impossible to excavate as much as expected by simply installing a cutter. In particular, it is clear that spline holes with long legs of 18 m or more cannot be drilled at all.

Mainly for the above reasons, the current situation is that long-leg connecting walls, long-leg connecting walls, and long-leg stacking walls have not yet been constructed.

In addition, with the sheet pile construction method, sheet piles can be constructed in close proximity to existing buildings, but this only involves excavating holes for sheet pile installation, and when constructing long-leg connecting walls, long-leg connecting walls, etc. within the vicinity. Structurally, it requires many other ancillary facilities.

Therefore, in principle, the structure is no different from that of a conventional excavator.

In addition, with the sheet pile construction method, it is true that sheet piles can be constructed in close proximity to existing buildings, but because the main and slave augers are installed side by side, the excavated holes are simply placed side by side for sheet piles. They are just two holes. Therefore, in order to drill a hole for a continuous wall, it is necessary to excavate and remove the earth and sand between the two holes again, which may complicate the process and prolong the construction process. Since the driven auger rotates through engagement between the stop hole and the bolt, it is not expected that a free and precise rotation position will necessarily be secured.

In particular, since nothing is disclosed as a reinforcing material between concrete walls using a conventional excavator, it seems that there is a problem in terms of strength, especially for long objects.

``Means for Solving the Problems'' Therefore, the present invention provides various types of long-leg wall pieces for earth retaining, such as long-leg connecting walls, long-leg connecting walls, or long-leg stacked walls (hereinafter simply referred to as long-leg connecting walls), within the above-mentioned proximity line. In order to construct the structure, we first used a long concrete wall piece for retaining the earth, a leader that could rotate 180 degrees around the boom of the crane, and a chain installed between steel plates placed at narrow intervals, along with the earth removal curved surface of the main body. A pair of claws completely protrudes from the front-rear direction and lower end face of the steel plate, and the soil removal curved surface and both sides of the claw protrude considerably from the widthwise end face of the steel plate. An excavating machine that is narrow in plan view and equipped with double-curved metal fittings is suspended, and this excavating machine can be rotated 180 degrees to the boom via a support member installed on one of the steel plates. It can be hung in a cantilevered manner. Then, a long spline hole of 18 m to 25 m is drilled on the adjacent line using the spline method using this excavation work machine, and in the space of the spline hole formed when the excavation work machine is lifted from this spline hole, Concrete is immediately poured in to form concrete wall pieces, and these concrete wall pieces are successively stacked into long spline holes to construct the structure.

In addition, with the long foot wall piece for earth retaining that can be left behind, the excavation work machine is suspended cantilevered from a leader that can rotate 180 degrees to the crane. It is composed of a locking mechanism for connection and a chain having a large number of double-curved metal fittings with claws, and is detachably attached to the drive device body, and when it is cut away from the drive device body. , a wall piece frame body which is a long leg wall piece and which is disposed oppositely at narrow intervals and has a reinforcing member between steel plates and a groove for a chain guide on the longitudinal periphery thereof, and a chain member that is pivoted to this wall piece frame body. The excavating soil discharging section is constructed in combination with a chain gear for stopping and driven, and is configured in combination with the excavating soil discharging section, and after the excavating soil discharging section is excavated into the ground on a line of proximity via the excavating work machine, the excavating soil discharging section The structure was constructed such that various types of long-leg wall pieces for retaining earth, such as long-leg connecting walls, connected long-leg walls, and long-leg stacked walls, each measuring 18 to 25 m, were successively installed on the adjacent line.

Moreover, the present invention almost completely connects the gaps formed between the long leg wall pieces forming the long leg connecting wall,
For the purpose of almost completely shielding collapses or cracks in the adjacent original land, as well as leakage or runoff of groundwater, etc., long foot wall pieces for earth retention, installed using the left-over construction method, are installed in succession on the adjacent line, and these long foot walls are installed one after another on the adjacent line. A connecting fitting installed in a gap between wall pieces, which includes a main body part that is mountain-shaped in plan view, and an adhesion piece part that comes into close contact with the H-shaped steel of the long wall piece for earth retention provided at both ends of this main body part. or a main body part having a chevron-shaped base shape in plan view, having a contact piece part that comes into close contact with the H-shaped steel of the long leg wall piece for earth retaining, and a connecting fitting consisting of a main body part, which is provided across the free end side of this main body part. A connecting fitting consisting of a connecting part having a recessed part.

Furthermore, in order to increase the wall load of long-legged connecting walls and prevent them from falling, this invention uses a spline construction method to create a retaining wall that connects the long-legged wall pieces of long-legged connecting walls that are 18 m to 25 m long on the adjacent line. This connecting device is configured to excavate a long spline hole with a length of 18 m to 25 m through the excavating work machine at a location where the long wall pieces are connected and perpendicular to the adjacent line. Then, concrete is immediately poured into the spline hole space created when the excavating machine is lifted from this spline hole to form a concrete wall piece, and this concrete wall piece is sequentially inserted into the long spline hole. Concrete and reinforcing bars are placed in the gap between the retaining wall constructed in layers and the long wall piece.

``Function'' Next, we will explain the function of the present invention. First, we will explain the concrete long wall piece for earth retention.
A boom installed on a crane is equipped with a leader that can rotate 180 degrees, and an excavation machine equipped with a large number of claw-shaped double-curved metal fittings is suspended from the leader in a cantilevered manner via a pulley. Therefore, since the other steel plate of the excavating work machine is flat, it can be placed so as to be in contact with a building or the like.

The thus suspended excavation work machine is placed at a position on the proximate line for constructing the long leg connection wall, while the crane is placed so that it can travel at a location away from the position of the long leg connection wall.

In this state, when the claw-type double-curved metal fitting with claws of the excavation work machine is rotated in the forward and reverse directions, the earth and sand are excavated and discharged, and the metal-shaped double-curved metal fitting with claws is made to sink one by one until it reaches a predetermined position. As mentioned above, all of the claw-type double-curved metal fittings and all of the claws provided thereon protrude from the front and rear and lower end surfaces of both steel plates, so it is one size larger than the main body of the excavation work machine. The spline hole is drilled, and the main body of the excavating machine sinks without experiencing earth pressure resistance. By repeating such operations, the drilling of a spline hole that is one size larger than the main body of the excavating machine is completed.

Since the wall surface of the spline hole drilled in this manner is in contact with the steel plate, it helps to prevent the wall from collapsing and eliminates the use of bendonite liquid.

After that, after slightly reversing the claw-type double-curved metal fitting, when this excavation work machine is lifted, the space corresponding to the lifted space is created between the spline hole and the excavation work machine. When the space is filled with concrete, a concrete wall section is constructed here.

By sequentially repeating such lifting of the excavating machine and filling with concrete, and stacking the concrete wall pieces, a long concrete wall is constructed at the location.

Then, when this long-legged concrete wall is half-dry, a shaped steel is inserted almost vertically in response to the earth pressure load, and a long-legged wall piece sufficiently reinforced with the shaped steel is constructed here.

Subsequently, the crane is moved, usually leaving an unexcavated area of approximately the same length as the long leg wall piece, and constructing the long leg wall piece here as well through excavation, concrete and mold steel insertion in the same manner as described above. .

When the above-mentioned operations are performed one after another on adjacent lines, long leg wall pieces are intermittently constructed here.

After that, over a period of approximately one day, a long wall piece will be constructed here as well by excavating the previously thinned out unexcavated area and inserting concrete and shaped steel.

If the above-mentioned operations are carried out one after another on the unexcavated portions on the proximate line, a connecting long-legged connection wall will be constructed on the proximal line.

In addition, for the purpose of connecting and reinforcing the long wall pieces of the long-legged connecting wall constructed as described above, a connecting device equipped with a retaining wall may be provided, and in this case, the long-legged connecting walls are used to partition After removing the earth and sand from the excavated construction site and creating a root cut, a length of 10m to 25m is cut through the excavation work machine at the location where the long wall pieces are connected and perpendicular to the adjacent line. A spline hole is drilled in the length of the piece (in this case, long legs are included), and concrete is immediately poured into the spline hole space created when the excavating machine is lifted from the spline hole to form a concrete wall piece. A retaining wall is constructed by sequentially stacking these concrete wall pieces into the long spline holes.

After that, soil is removed from the gaps between each long wall piece, formwork is placed here, reinforcement is placed, and concrete is filled in here.

As a result, a retaining wall and a long-legged connecting wall are constructed, and this long-legged connecting wall can handle earth pressure loads and is also very useful in preventing falls.

Further, the retaining wall is buried underground (including the bottom of the base). Although not shown, a part of it may be exposed from underground.

Furthermore, when constructing a long wall piece using the spline construction method, a seventh
As shown in the figure, it is also possible to use the double-row spline construction method to create stacked long-legged walls. in this case,
The H steel members provided on the long leg wall pieces overlap, improving the strength of the long leg connecting wall.

Further, another function of the present invention is introduced, namely, the long wall piece is used as an excavation and earth removal part. To explain the so-called left-over type long leg wall piece for earth retaining, it is equipped with a leader that can rotate 180 degrees on a boom installed on a crane, and a drive device that drives a chain equipped with a large number of claw-shaped double-curved metal fittings. Cantilevered from the main body of the drive unit.

When combining the long wall piece (excavation and removal part) that can be combined or detached with this suspended drive device main body,
First, the main body of the drive device is lifted up using a crane or the like, and the main body of the drive device is placed in a suspended state.

After that, use the same crane or another crane to lift the long leg wall piece close to the already suspended drive unit body, insert the insertion leg provided on the drive unit body into the insertion space of the long leg wall piece, and then By engaging the locking pin of the lock mechanism provided in the reinforcing member of the long wall piece, the drive device main body and the long wall piece are combined.

After that, a chain having a large number of double-curved metal fittings with claws is suspended between the driving chain gear and the driven chain gear, and the chain and the double-curved metal fittings with claws are connected to the driving chain gear. It is possible to rotate the groove between the groove forming member provided on the long wall piece and the driven chain gear.

Therefore, after positioning the combined long wall piece on the line of proximity, the chain gear for driving is driven to move the chain and the double-curved metal fittings with claws around the earth and sand on the line of proximity. The excavated soil is excavated with a double-curved metal fitting with a claw, and then transported to the ground as the double-curved metal fitting with a claw moves around, and the excavated soil discharged by the double-curved metal fitting with a claw is not shown. It is dumped at a location other than the proximity line via a chute.

By repeating such operations, the earth and sand are excavated and removed in sequence, and the long wall pieces are successively dug into the ground.

Once the long wall piece has been dug to the specified location as described above (normally the top end of the long wall piece is almost flush with the ground), remove the chain connecting pin and cut the chain. Upon release, this cut chain rotates the drive chain gear in either direction.

After that, the locking pin of the locking mechanism was removed from the reinforcing member of the long leg wall piece, the long leg wall piece was completely cut away from the drive unit body, and only the long leg wall piece (the excavated earth part) was buried in the ground. In this state, lift only the main body of the drive device and move it to the next proximity line. As a result, it no longer functions as an excavation and earth removal section.
It will function as a long wall piece.

Then, as mentioned above, the next long wall piece is attached to the main body of the drive device, the chain is suspended, etc., the chain is moved around and the soil is removed, and then the long wall piece is detached.
If the operation is repeated, such as being buried in a left-behind manner,
Long leg wall pieces are also buried on this proximity line in a leftover manner to construct an earth retaining wall.

In order to close the gaps between the many long wall pieces constructed as described above, in this invention, the soil in these gaps is first removed, and the connecting fittings are inserted into the spaces formed by this removed soil. At this time, both contact parts and contact piece parts of the connection fittings are crimped to the H-shaped steel provided on each long wall piece in order to substantially block water ingress from the earth retaining wall and to cope with earth pressure loads.

Each long wall piece is connected and integrated to prevent the collapse of earth and sand.
Prevents leakage of running water.

"Embodiment" An embodiment of the present invention will be described below with reference to the drawings.

First, to explain the earth retaining wall made of long concrete earth retaining wall pieces shown in Figs. 1 to 9, 1 is a crane, this crane 1a is its boom, and this boom 1a has a leader 2 that can turn 180 degrees.
is provided. An excavating machine 4, which will be described later, is suspended from the leader 2 via a pulley 3 in a substantially vertical state.

This excavation work machine 4 consists of two steel plates 5, 5a that are erected at a narrow interval, and
Chain wheels 6 and 7 are pivoted at the upper and lower ends of space a, and a large number of claw-type double-curved metal fittings 8 are wound between the chain wheels 6 and 7 (hereinafter simply referred to as 8). It consists of a chain 9 with a Its dimensions are approximately 90 to 120 cm in width, 17 to 30 cm in distance between steel plates 5 and 5a,
A length of 2000 to 3000 cm is considered ideal. Further, the chain 9 wound between the chain wheels 6 and 7 includes a steel plate 5,
Driven by a motor 10 provided between 5a, the double-curved metal fitting 8 with claws is rotated forward and backward.

In the figure, 11 is a pulley for suspending the excavation work machine 4.
Reference numeral 12 is a rope, and reference numeral 18 is a support member provided on one side of the excavating machine 4 that supports the pulley 11. Therefore, the excavating machine 4 is attached to the boom 1a together with the leader 2 via the support member 18, the pulley 11, the rope 12, and the pulley 3.
It is suspended so that it can rotate 180°.

A long hole 19 for a regulating plate is formed in one of the steel plates 5a in the longitudinal direction and in the center thereof. A regulating plate 20 provided below the leader 2 is inserted into this elongated hole 19 to eliminate blind movement when the main body of the excavating machine descends.
It is designed to reliably dig into a predetermined position.

Further, the claw-type double-curved metal fitting 8 is connected to the chain 9.
It has a pair of brackets 21, 21 that connect the two curved metal fittings 8 with claws, and the brackets 21,
21 are arranged substantially parallel to each other at intervals that allow the chain 9 to be sandwiched therebetween. Each bracket 21
Two through holes 22 are vertically opened in each of the holes. A pin 23 provided on the chain 9 is inserted into the through hole 22 . Therefore, by inserting the pin 23 into the bracket 21, the bracket 21 and the chain 9 are connected.

Further, a large roller 24 is loosely fitted to the pin 23, and this roller 24 rolls and moves along a chain guide provided on the main body of the excavation work machine 4, and the chain 9 and the double curved surface with claws are rotated. The metal fittings 8 and the like are configured to prevent them from unnecessarily shaking or sinking into the excavating machine 4 due to earth pressure. Ideally, the main body 8 of the double-curved metal fitting with claws and the claws described below are forged products, but other methods such as forging are also possible. The chain guide is provided as close as possible to the end faces of the steel plates 5, 5a for the purpose of making the double curved metal fitting 8 with claws protrude from the steel plates 5, 5a as described later. Moreover, this reduces the amount of soil adhering to the excavating work machine 4, contributing to the ease and simplification of the work.

Reference numeral 25 in the figure is a net body made up of brackets 21, 21 arranged in series at the rear end, and soil removal curved surfaces 26 are formed on the upper and lower surfaces of this net body 25, respectively, so that the vertical symmetrical relationship (excavation work When viewed from the side, it is approximately T-shaped (when the machine is suspended). In this example, several through holes 27 are opened at the rear of the earth removal curved surface 26, and the purpose is to facilitate the fall of the scooped excavated earth and sand together with the curved surface of the earth removal curved surface 26. , even with excavated clay soil,
It is possible to fall from the double-curved metal fitting 8 with claws.
In addition, the root part of the earth removal curved surface 26 is made considerably thick,
It is constructed to be able to cope with earth pressure resistance.

Furthermore, a pair of claws 2 are provided on the tip side of the main body 25.
8 are provided, and a recess 29 is provided between the claws 28. The claw 28 is configured so that it can be easily removed or attached, for example, by means of attachment means such as a pin, in consideration of wear and tear, breakage, etc. of the claw portion 28a.

A double-curved metal fitting with claws 8 constructed as described above.
The whole of the earth removal curved surface 26 of the main body 25 and all the claws 28 provided on the main body 25 completely protrude from the front and rear and lower end surfaces of both steel plates 5, 5a, and in the width direction. It has a structure that protrudes considerably from the soil removal curved surface 26 as well as both sides of the earth removal curved surface 26 and the claw 2.
Since both side surfaces of the steel plates 5 and 5a protrude considerably from the widthwise end surfaces of the steel plates 5 and 5a, the shape of the spline hole drilled by the excavation machine 4 is one turn from the main body of the excavation machine 4. It will be heavily excavated.

Further, as a result, the long wall piece A is constructed in a spline type as shown in FIG. At intervals of about one day, the next long wall piece B is similarly constructed in a splined manner. Further, as shown in Fig. 7, the long leg wall pieces A and B are constructed alternately in a double-row spline type, and the long leg wall pieces A and B are joined via concrete or the like, and ultimately, the long leg wall pieces Long wall piece A of connecting wall C,
For the purpose of connecting and reinforcing B, a connecting device 31 with a retaining wall is provided. 30 is a shaped steel or shaped steel material.

That is, the excavating machine 4 is placed in a direction perpendicular to the joint between the long wall pieces A and B that have already been constructed, and a long spline hole of 18 m to 25 m is excavated in the same manner as described above. Concrete is immediately poured into the spline hole space formed when the excavating machine 4 is lifted from the hole to form concrete wall pieces, and these concrete wall pieces are sequentially laminated into the spline holes of the long object. By doing so, the retaining wall 32 is constructed.

After that, remove the soil from the gaps between each long wall piece A and B,
Formworks 33 and 34 are placed here to surround the space.
Then, reinforcement 35 is placed and concrete is filled there.

As a result, the retaining wall 32 and the long-legged connecting wall C are constructed, and the long-legged connecting wall C can cope with the earth pressure load, and is also very useful for preventing falls.

In the figure, 35a is the H steel material of the long wall pieces A and B, and 36 is the welded part.

Although not shown in the drawings, instead of the above-mentioned concrete, concrete (soil) wall pieces made by mixing cement milk into excavated soil, concrete wall pieces containing the same H steel, etc. may be used in the same manner.

Next, Figures 10 to 17 (partially Figure 6,
(Used in Fig. 7) describes the long leg wall piece for earth retaining of the leave-in type. 41 is the long leg wall piece that also serves as the excavation and soil removal part, and this long leg wall piece 41 is used to cut commercially available steel plates 43, 43 into narrow spaces. These steel plates 4 are arranged oppositely at intervals.
In this example, between 3 and 43, there are two reinforcing members 44 made of H-shaped steel, I-shaped steel, etc. provided at appropriate intervals, and a groove forming member 46 of C-shaped steel provided around the periphery. Furthermore, a chain guide groove 45 is formed in the longitudinal peripheral portion 42a of the groove forming member 46. A chain 9 having a large number of double-curved metal fittings 8 with claws is wound around this groove portion 45 .

A driven chain gear 7 is pivoted to the converged lower end of the long wall piece 41 configured as described above.
As shown in the figure, this driven chain gear 7 has cut grooves 6 formed in a groove forming member 46 and reinforcing members 44, 44.
6, 64, 64, and this cut strip 66, 6
The sliding contact with the end faces of the grooves 4 and 64 ensures that the thin driven chain gear 7 can oscillate laterally and rotate smoothly.

Further, the driven chain gear 7 is made of steel and is thin, so it is rotatably attached to a shaft 49 provided on a mounting plate 50 via a collar 48. This prevents the shaft 49 from being cut even when the driven chain gear 7 rotates.

In the figure, reference numeral 10 denotes a drive device main body having a substantially semi-elliptical shape, which is equipped with a drive device (in the present invention, a motor) 52 suspended from a crane 1, etc., and a chain guide 53 around the periphery. 53 is provided with a drive chain gear 6 which is fixed to the output shaft of the motor 10, and at its lower end there is an inserter that is inserted into the space of the long wall piece 41 extending from the lower end thereof. Leg portions 55, 55 are provided, respectively. Note that the tips of the insertion legs 55, 55 are tapered slightly, so that they can be inserted into the long wall piece 41 reliably and easily. Further, a pair of cylinders 56 are provided at the lower end of the drive body 51, and piston rods 56a, 56a extend from the drive body 51. As a result, the gap D formed between the drive device main body 51 and the long wall piece 41 is expanded or contracted,
This is to adjust the tension of the chain 9 suspended on these.

In the figure, numeral 59 denotes a locking mechanism that tightens the driving device main body 51 and the long wall piece 41. In addition, 70 in the figure is only on one side of the steel plates 43, 43 of the long leg wall piece 41, and there are many small holes near the bottom of the long wall piece 41, and the proximity line 1
The water on or near the inside of the long wall piece 7 can be guided into the long wall piece 41 and drained to the outside via the drain pipe 71. In addition, water outside the proximity line 17 is not sucked in as a general rule, eliminating problems such as ground subsidence and building inclination.

Reference numeral 80 in the figure represents a connection fitting made of steel such as a steel plate, which is provided in the gap between the long wall pieces 41 and 41, as shown in FIGS. 14 to 17, respectively. In the example shown in the figure, a main body portion 81 having a chevron-like shape when viewed from above, and a main body portion 8
H of the long wall piece 41 for earth retention provided at both ends of 1
It is comprised of a bent-shaped contact portion 82 that is in close contact with the shaped steel. Moreover, FIG. 16 and FIG. 17 show a contact piece portion 83 that is in close contact with the H-shaped steel of the long leg wall piece for earth retention.
A main body portion 8 having a chevron-like base shape in plan view, etc.
3, and a connecting portion 85 having a concave piece portion 84 provided across the free end 83b side of the main body portion 83. Further, the concave piece portion 84 is a modified example shown in FIG.
Although not shown, other examples may be considered depending on the purpose.

This makes it possible to prevent the gaps between the long wall pieces 41 from being blocked, collapsing, running water and flooding.

Also, for this left-over type long leg wall piece for earth retaining, the single or double spline construction method can be considered, similar to the above example.

In addition, this connection fitting 80 can be similarly applied to a long wall piece (not shown) which is made of concrete having vertical holes or concrete with piano wire and which also serves as an excavation and earth removal section, in place of the long wall piece 41. Can be adopted.

``Effects of the invention'' In the present invention, which is configured as detailed above, various types of long-leg wall pieces for retaining earth, such as 18 m to 25 m long-leg connecting walls, long-leg connecting walls, or long-leg stacking walls, are arranged in a row within the proximity line. It can be constructed using the double spline construction method.

Moreover, the present invention almost completely connects the gaps formed between the long leg wall pieces forming the long leg connecting wall,
Collapses or cracks in the adjacent land, leakage or runoff of groundwater, etc. can be almost completely shielded.

Furthermore, the present invention is a connection device equipped with a retaining wall that greatly helps in increasing the wall load of the long-legged connection wall and preventing it from falling over.

[Brief explanation of the drawing]

The drawings are diagrams showing one embodiment of the present invention.
Figures 9 to 9 show a machine used for long concrete earth retaining wall pieces. Figure 1 is a front view, and Figure 2 is a front view.
Figure 3 is an enlarged sectional view of the same as above, Figure 3 is an enlarged view showing the lower part of the excavation machine and the long hole, etc. Figure 4 is a plan view further enlarged showing the double curved metal fitting with claws, and Figure 5 is FIG. 4 is a side view, FIGS. 6 and 7 are explanatory views showing an example of construction, and FIGS. 8 and 9 are views showing a connecting device provided with a retaining wall. Also, Figures 10 to 17 show a machine used for long leg wall pieces for leave-behind type earth retaining. The figure is a sectional view of the main part of Figure 11, and Figure 13.
The figures are schematic diagrams of excavation and installation conditions, Figures 14 to 17
The figures are plan views showing examples of connection fittings. 1...Crane, 2...Leader, 3,11...
...pulley, 4...excavation work machine, 5, 5a, 43,
43...Steel plate, 6,7...Chain wheel, 8...Steel type double curved metal fitting with claws, 9...Chain, 14...Concrete wall, 15...Boundary line, 17...Proximity line, 18
...Structure member, 19 ... Long hole, 20 ... Regulation plate,
21...Bracket, 22, 27...Through hole, 23
...Recess, 24...Rolling wheel, 25...Main body, 26
...Earth removal curved surface, 28...Claw, 29...Concavity, 30
...Shaped steel or shaped steel material, 31... Connection device with a retaining wall, 32... Retaining wall, 33, 34... Formwork, 35... Reinforcement, 41... Long leg wall piece, 44...
Reinforcing member, 45...Groove portion, 46...Groove forming member,
48...Color, 49...Shaft, 50...Mounting plate,
51... Drive device main body, 53... Chain guide, 55... Insertion leg, 56... Cylinder, 5
6a... Piston rod, 64, 64, 66...
Cut line, 70...Small hole, 71...Drain pipe, 8
0... Connection fittings, 81, 83... Main body part, 82
...Adhesion part, 83a...Adhesion piece part, 82b...
Free end, 84... recessed piece part, 85... connecting part,
A, B... Long leg wall piece, C... Long leg connecting wall, D...
gap.

Claims (1)

[Scope of Claim for Utility Model Registration] In addition to preventing collapse of the excavation wall, steel plates provided at narrow intervals forming the framework of the excavation work machine, and a sliding transition between the steel plates and the surrounding area between the steel plates, and A chain suspended from a chain wheel for driving and tensioning provided on the chain wheel, a drive device provided on the steel plate for driving the chain wheel for driving, and a chain main body provided at appropriate intervals on the chain. A narrow and long-legged excavating machine consisting of a large number of grout-shaped double-curved metal fittings with claws, in which the soil surface and all of the claws completely protrude from the longitudinal and lower end surfaces of the steel plate. Make use of it. A long spline hole with a length of 18m to 25m is excavated on the adjacent line using the spline method using this excavation work machine, and concrete is immediately poured into the space of the spline hole that is formed when the excavation work machine is lifted from this spline hole. Or pour cement milk to form a concrete wall piece. These concrete wall pieces are sequentially laminated into the long spline holes. As a result, various types of long-legged wall pieces for retaining earth, such as long-legged connecting walls, long-legged connecting walls, and long-legged stacked walls, are constructed within adjacent lines. A long spline hole of 18 m to 25 m is drilled on the adjacent line using the spline method using a narrow and long-legged excavation machine equipped with a large number of claw-shaped double-curved metal fittings, and from this spline hole. Concrete or cement milk is immediately poured into the spline hole space formed when the excavating machine is lifted to form a concrete wall section, and the concrete wall sections are sequentially stacked into the long spline holes. Various types of long-legged wall pieces for earth retaining, such as long-legged connecting walls, long-legged connecting walls, and long-legged stacked walls, to be constructed are successively installed on adjacent lines, and retaining walls are provided in gaps between these long-legged wall pieces. It is a connecting device. This connection device uses the excavating machine to drill a long spline hole of 18 m to 25 m at a location where the front and rear long wall pieces are connected and perpendicular to the adjacent line, and then the excavating machine Concrete or cement milk is immediately poured into the spline hole space formed when the concrete is lifted to form a concrete wall section, and the concrete wall sections are successively stacked into the long spline holes for construction. A retaining wall,
A connection device comprising a retaining wall having a structure in which concrete and reinforcing bars are arranged in the gap between the long wall piece and the long wall piece. The excavation work machine is suspended cantilevered from a leader that can rotate 180 degrees on a crane, and is connected to a chain drive chain gear installed between narrowly spaced steel plates, a locking mechanism for connection, and a large number of pawls. A chain consisting of a chain having a square-shaped double-curved metal fitting, and a drive unit that is removably attached to the drive unit, and which is connected at a narrow interval that becomes a long leg wall piece when it is cut away from the drive unit. Consisting of a reinforcing member between installed steel plates, a wall piece frame body having a chain guide groove in its longitudinal periphery, and a driven chain gear for locking the chain that is pivoted to this wall piece frame body. A long connecting wall of 18 m to 25 m is constructed on the adjacent line by leaving it as it is after digging the excavating earth removing part into the ground. , connecting long wall pieces for earth retention such as connecting long foot walls, long foot stacked walls, etc. are successively installed, and the connecting fitting is installed in the gap between the long foot wall pieces, and the main body part has a mountain shape or the like when viewed from above. Various types of long-leg wall pieces for earth retaining, such as long-leg connecting walls, long-leg connecting walls, long-leg stacked walls, etc. Connection fittings between each other. The excavation work machine is suspended cantilevered from a leader that can rotate 180 degrees on a crane, and is connected to a chain drive chain gear installed between narrowly spaced steel plates, a locking mechanism for connection, and a large number of pawls. A chain consisting of a chain having a square-shaped double-curved metal fitting, and a drive unit that is removably attached to the drive unit, and which is connected at a narrow interval that becomes a long leg wall piece when it is cut away from the drive unit. Consisting of a reinforcing member between installed steel plates, a wall piece frame body having a chain guide groove in its longitudinal periphery, and a driven chain gear for locking the chain that is pivoted to this wall piece frame body. It consists of a combination of an excavated earth removal part or an excavation earth removal part made of concrete, and after the excavation earth removal part is excavated into the ground through the excavation work machine, it is left as it is and is placed 18 m to 18 m on the proximity line. Various types of earth retaining long wall pieces such as long foot connecting walls, connecting long foot walls, and long foot stacking walls each having a length of 25 m are successively installed, and the connection fitting is installed in the gap between the long foot wall pieces, A long-legged connection consisting of a main body portion that has a chevron-shaped base shape in plan view and has a close contact piece that adheres to the H-shaped steel of the wall piece, and a connecting portion that has a recess provided across the free end side of this main body portion. Connecting fittings between various long-legged wall pieces for earth retaining such as walls, long-legged connecting walls, long-legged stacked walls, etc.