JPH05163720A - Underground wall and construction of continuous underground wall - Google Patents

Abstract

PURPOSE:To enhance the construction efficiency by a method in which a vertical pit is excavated by a small-width excavator, and while pulling the excavator along the pit wall by the wire of an excavator for vertical pit, a trench is excavated, vinyl sheets, reinforcing bars, and shape steels are set in the trench, and concrete is placed. CONSTITUTION:A small-width excavator A consisting of a chain with claws is set on an excavator having a boom to be tilted 90 deg. bilaterally, and a coupling plate 12 is set on the vertical intermediate of the excavator A and connected with a throttle wire 14 set on the excavator. A vertical pit is excavated by the excavator A and the excavator A is pulled laterally by the wire 14 to excavate a trench. In the trench, a waterproof vinyl sheet and reinforcing material such as reinforcing bars are set, and concrete is placed. An underground wall having excellent water-stopping effect can thus be constructed with a high efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground wall which is constructed prior to a foundation work of a house or various water stop works, or a continuous wall construction method for constructing an underground wall for water stop, and It concerns various underground walls.

[0002]

2. Description of the Related Art Heretofore, various inventions or ideas have been presented as a wall construction method.

For example, a construction method of a continuous concrete soil retaining wall using a horizontally sliding formwork disclosed in JP-A-47-14909 and a method for continuously constructing an underground continuous wall in JP-A-57-155422 can be mentioned.

The above invention is a method for constructing a continuous wall by excavating an underground excavation hole and then excavating in the forward direction, and successively filling the excavated excavation hole with a wall constituent material such as concrete. ..

[0005]

Since the continuous wall construction method described above is a construction method of excavating and advancing in the forward direction through the excavating device, the earth pressure resistance in the ground is extremely strong, and With the advance of, it is impossible to drill at all.

Therefore, it has been considered impossible to construct a connecting wall through a simple excavation work machine.

[0007]

In view of the above, the present invention provides
We have devised a connecting wall method that can reliably and practically construct a connecting, connecting or assembling underground wall in the ground through a simple excavation work machine or equipment.

That is, the method of constructing an underground wall according to the present invention is an excavating work machine or an excavating stirring machine capable of constructing a narrow excavation hole in the ground, and pulling this excavating work machine in the forward direction, and It is a continuous wall construction method using a towing wire means that enables excavation in the forward direction and a heavy machine equipped with a winding device that applies a tensile force to the towing wire means. Vertical excavation process for driving a vertical drilling hole by driving a rock drill type metal fitting with a claw or a rock drill type stirring metal fitting, and a drilling work machine located in the ground after the vertical drilling hole is drilled At the same time as excavating the underground in the forward direction via a claw type drilling metal fitting with a claw, etc., through the pulling of the tow wire means, an excavation forward forcibly moving the excavation work machine or the like in the forward direction, In the drill hole, concrete, cement, A concrete member filling step of placing a concrete member such as milk, and a reinforcing material press-fitting step of press-fitting a reinforcing steel material such as a reinforcing bar cage or a mold material after the concrete member filling step and when the concrete member is not yet hardened. Composed of.

The present invention also provides a connection type, a connection type,
Or, the following configuration was adopted in order to construct an associative sealed underground wall through a reliable and simple excavation work device and to control the movement or leakage of underground water. ..

That is, the underground wall of the present invention comprises an excavating work machine or an excavating stirring machine capable of constructing a narrow excavation hole in the ground, and a machine for pulling the excavating work machine or the like in the forward direction and for moving it in the forward direction. Utilizing a heavy machine equipped with a pulling wire means that enables excavation and a winding device that applies a pulling force to the pulling wire means, first, a nail-type rock drill type metal fitting or a drill plow provided in an excavation work machine or the like is used. After driving the vertical stirring hole by driving the mold agitating tool, after the vertical drilling hole is drilled, through the claw-shaped drilling tool etc. of the excavation work machine located in the ground While excavating the ground in the forward direction, through the pulling of the towing wire means, forcibly move the excavation work machine or the like in the forward direction to form a drill hole in the forward direction,
It is constructed by sequentially inserting a vinyl sheet into the excavation hole and placing concrete members such as concrete and cement milk.

[0011]

Next, the operation (construction method) of the present invention will be described.

First, in the case of constructing an underground wall through concrete pouring, first, the excavation work machine is suspended on the ground surface, and the excavation work machine is provided substantially at the center in the longitudinal direction. The pulling wire is locked between the locking plate and the drawing wire that is prevented from sinking into the ground (state of FIG. 4).

Further, usually, the vicinity of the pulling wire is dug up by a machine called Yumbo.

Subsequently, the claw type drilling metal fitting of the excavating work machine is rotated in the forward and reverse directions to excavate the earth and sand, and
The excavated earth and sand is discharged to the ground through the claw-shaped rock excavating metal fitting (the excavation and the excavated soil are simply referred to as excavated and discharged soil hereinafter).

While excavating and excavating the soil, the leader is used as a guide to sequentially descend the excavating work machine to excavate the excavating work machine into the ground.

As the excavation work machine advances into the ground, the pulling wire gradually slips into the ground from the direction of the locking plate, and is tensioned in order, just in the forward direction (see FIG. 4, About 30 ° to 45 ° toward the right in the drawing (the same applies hereinafter) (of course, this angle is an example, and it depends on the length of the pulling wire, the excavation of the excavating work machine into the ground, and the like. The same applies hereinafter), and the other locking portion is in a tension state in which it is located on the ground (state in FIG. 5).

Then, following the previous time, the claw-shaped drilling metal fitting of the excavating work machine is rotated in the forward and reverse directions to excavate the earth and sand while advancing the excavating work machine by pulling the pulling wire through the drawing wire. By tensioning in the forward direction, this can be achieved reliably and relatively easily.

In other words, the length of the throttle wire stretched in a superposed manner between the pulleys is successively narrowed through the winch of the heavy machine, and finally, the length of the throttle wire is shortened sequentially. The above-mentioned diaphragm is formed (the same applies hereinafter).

Through this tension in the forward direction (the same applies hereafter by the operation of narrowing the so-called throttle wire), the excavation work machine is forcibly pulled in the forward direction, and at the same time, the claw-shaped cauldron excavating metal fitting. Then, the earth and sand in the advancing direction are sequentially advanced while excavating and discharging the earth (state of FIG. 6).

The excavation work machine is sequentially moved in the forward direction through the excavation and the earth removal through the nail-type rock drilling metal fittings described in detail above and the tension due to the narrowing of the pulling wire of the pulling wire.

As a result, continuous drilling holes for the underground wall are continuously drilled, and concrete members such as concrete and solid material (hereinafter simply referred to as concrete) are successively drilled in the continuous drilling holes. And the vinyl sheet is inserted.

At this time, a shielding member for shielding concrete from entering is preferably provided between the continuous excavation hole and the excavation work machine (state shown in FIG. 6).

When concrete is placed in the continuous excavation hole as described above, reinforcing materials such as a rebar cage, a drawn steel plate, and a shaped steel material are press-fitted in accordance with the earth pressure load ( (State of FIG. 7).

Although not shown, it is possible to first insert a reinforcing material such as a rebar cage or a shaped steel material into the continuous excavation hole and then pour concrete (however, a shielding member is used).

When one section (usually one direction of the proximity line) is completed through the above operation (procedure), the excavation work machine is pulled up from the excavation hole, and then the remaining excavation hole is reached. Placing concrete and inserting reinforcement, and remove the pulling wire and drawing wire. As a result, this section of the underground wall is constructed here.

After that, the following one section of the underground wall is constructed by the same operation as described above.

After that, when the above-mentioned operation is repeated a required number of times, an underground wall is constructed in the divided area.

Although slightly different from the above-mentioned example, it is naturally possible to make the excavation work machine continuously without pulling it up in the middle of the process.

When the underground wall is constructed by placing cement milk, the operation is almost the same as the above-mentioned operation, but in this case, the underground wall is formed by kneading the excavated soil and cement milk. To build.

That is, while excavating with a claw-type stirring metal fitting of an excavating and stirring machine, cement milk is press-fitted and sequentially advanced into the ground while kneading with the excavated earth and sand.

When a predetermined underground position is reached, a part of the underground wall made of soil cement is constructed.

Therefore, in the same manner as described above, the excavating and stirring machine is
It moves in the forward direction via the pulling wire means, and successively constructs an underground wall of soil cement.

After the soil cement underground wall is constructed to some extent in this manner, the vinyl sheet and the reinforcing material are press-fitted therein.

When the operations such as the excavation and the press-fitting of cement milk and the press-fitting of the reinforcing material are sequentially performed, and one section (usually, one direction of the section or the boundary) is completed, the excavating and stirring machine is operated here. Is pulled up from inside the soil cement and the pulling wire means is removed to construct this one-section underground wall.

After that, the next section of the underground wall is constructed by the same operation as described above.

After that, when the above-mentioned operation is repeated a required number of times, a continuous wall type underground wall is constructed.

[Example] An example of an apparatus used in the method of the present invention for connecting walls will be described below.

First, as shown in FIG. 5, the excavating work machine A has a structure provided with a large number of claw type drilling metal fittings 1 ... Yes, a typical example thereof will be described.

2 is a heavy machine, 3 is a boom of this heavy machine 2, and a leader 4 capable of turning 180 ° is provided on the boom 3 in principle. Then, the excavating work machine A, which will be described later, is placed in a substantially vertical state via the suspension member 4c on the wire 4b hung on the pulley 4a on the arm portion (not shown) of the leader 4 or on the lifting chain (not shown). Hang on.

The excavating work machine A is for driving two chains of outer and inner steel plates 5 and 5a which are erected at a narrow interval, and a chain which is axially attached to the upper and lower ends of the steel plates 5 and 5a. Chain wheel 6 or chain wheel 7 for chain tension (also used as a driven wheel)
And a chain 8 provided with a large number of claw-shaped drilling metal fittings 1 wound between the chain wheels 6 and 7. Ideally, the dimensions are such that the width is 90 to 120 mm, the interval between the steel plates 5 and 5a is 17 to 30 mm, and the height is 450 to 800 mm.

The chain 8 wound between the chain wheels 6 and 7 is driven by a motor 9 such as a hydraulic motor provided between the steel plates 5 and 5a. ..

The rake face and the claws of the turret type drilling metal fitting 1 with claws project in the direction of the toes larger than the peripheral portions of the steel plates 5, 5a, or in the width direction thereof larger than the depth of the excavating work machine A. It is configured to do.

Further, reference numeral 10 in the drawing denotes a connecting device for enabling the drive device main body A'constituting the excavating work machine A and the excavating machine part A "to be combined or separated.

A lock for pulling the excavating work machine A substantially linearly (including a straight line such as an inclined direction) in the forward direction is provided at a substantially central portion in the longitudinal direction of the excavating work machine A. A plate 12 is attached, and a base end portion 13a of a pulling wire 13 is locked to the locking plate 12.

The tip portion 13 of the pulling wire 13
b constitutes a part of the traction wire means B, and specifically, has a role of pulling the excavation work machine A in the forward direction, and when the excavation work machine A excavates into the ground, it is embedded in the ground. In order to prevent it, the structure has a role of pulling toward the ground.

Reference numeral 14 is a diaphragm wire which constitutes another part of the pulling wire means B.
Is a pulley 17 attached to the anchor 15 via a mounting wire 16 and a pulley 18 facing the pulley 17.
It is wound several times between and, and its tip in the drawing direction reaches the winch 20 via the guide pulleys 1a and 1b provided on the heavy machine 1.

Therefore, when the squeezing wire 14 is squeezed by the winch 20 to reduce the distance between the pulleys 17 and 18, the pulling wire 13 is pulled and moves in the forward direction.

Through the movement of the pulling wire 13 in the forward direction, the excavating work machine A is forcibly moved in the forward direction while excavating the earth and sand, and finally, the continuous excavation hole for the underground wall. Is to be built. In the figure, 21 is a pulley 17
It is a sunk plate that prevents the digging into the ground.

Although the pulling wire means B is composed of the pulling wire 13, the drawing wire 14 and other equipment as described above, the pulling wire means B is not limited to this example. It is also possible to substitute with other equipment (not shown).

Reference numeral 22 in the drawing denotes a hook provided on the pulley 17, and the tip portion 13b of the pulling wire 13 is locked to the hook 22.

Although not shown, an excavating and stirring machine using cement milk is provided with a pipe for cement milk and equipped with a claw-type stirring metal fitting with a nail.

Others are the same as those of the excavation work machine described above.

9 and 10 show a waterproof (waterproof) device mainly used to prevent intrusion or movement of groundwater when constructing the underground wall.

In the figure, reference numerals 30 and 30a denote type C steels, which are provided at appropriate intervals in the underground direction of the underground wall of soil cement.

Then, the first C-type steels 30 and 30a are connected to the second C-type steels 30 and 30a by a second dimension which fits into the first C-type steel 30.
C-shaped steel 33 is provided.

A flat bar 31 is provided between the first C-shaped steel 30 and the adjacent first C-shaped steel 30a provided in this manner, and a vinyl sheet 32 is hung in the flat bar 31. It is provided.

The suspended vinyl sheet 35 is wound around the first C-type steels 30 and 30a.

The first C type steels 30 and 30a are provided with a second C type steel 33 which is slightly smaller than this (the other one is not shown,
The same shall apply hereinafter) is inserted to connect the first C-type steel 30 and the first C-type steel 30a with each other, and the second C-type steel 33 is also connected.
A flat bar 34 is provided in between, and a vinyl sheet 35 is provided in a hanging shape on the flat bar 34.

The drooping vinyl sheet 35 is wound around the second C-section steel 33.

The first C type steels 30, 30a and the second C type steels
Shaped steel 33, and vinyl sheet 32 that is hung and wound.
Stop the underground wall through 35 etc.

[0061]

INDUSTRIAL APPLICABILITY As described above in detail, the present invention provides a drilling work machine or the like capable of constructing a narrow drilling hole in the ground, and a machine for pulling the drilling work machine or the like in the forward direction and in the forward direction. It is a continuous wall construction method that uses a pulling wire means that enables excavation of the above and a heavy machine equipped with a winding device that applies a pulling force to the pulling wire means.

Therefore, it is possible to reliably and practically construct the underground wall of the continuous wall system, which was conventionally difficult to construct.

Further, in the underground wall into which the vinyl sheet is inserted, it is possible to surely prevent water stoppage or leakage of water inside or outside the underground wall.

Further, the present invention is a method of advancing an excavating work machine or the like by a narrowing down method, and advancing through excavation with a nail type drilling metal fitting or the like. As a result, continuous movement in the forward direction can be achieved without placing an excessive burden on the excavating work machine or the like.

Further, since the stabilizing solution is not used, problems such as collapse and crack of the ground, further problems of treating the used solution, etc. can be avoided, and troubles caused by construction or complicated setup can be solved. ..

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of an excavating work machine and apparatus used in the method of the present invention.

2 is a side view of the excavation work machine and apparatus of FIG. 1. FIG.

FIG. 3 is a plan view of the excavation work machine and apparatus of FIG. 1.

FIG. 4 is a schematic view showing the progress of excavation of the excavation work machine.

FIG. 5 is a schematic diagram showing the forward movement of the excavation work machine.

FIG. 6 is a schematic view showing a situation of excavation of the excavation work machine and a situation of inserting a vinyl sheet.

FIG. 7 is a schematic diagram showing a situation of excavation of the excavation work machine and a situation of inserting a vinyl sheet and a reinforcing material.

FIG. 8 is a partially cutaway side view of the excavation work machine used in the method of the present invention.

FIG. 9 is a schematic front view of the underground wall.

FIG. 10 is an enlarged transverse sectional view of the underground wall.

FIG. 11 is a schematic plan view of the underground wall.

[Explanation of symbols]

 1 claw type drilling metal fitting 2 heavy machinery 2a guide pulley 2b guide pulley 3 boom 4 leader 4a pulley 4b wire 4c suspension member 8 chain 5 steel plate 5a steel plate 6 chain wheel 7 chain wheel 9 motor 10 coupling device 12 locking plate 13 Pulling wire 13a Base end part 13b Tip part 14 Drawing wire 15 Anchor 16 Attachment wire 17 Pulley 18 Pulley 20 Winch 21 Immersion plate 22 Hook 30 1C type steel 30a 1C type steel 31 Flat bar 34 Flat bar 32 Vinyl sheet 35 Vinyl sheet 33 2nd C type steel A Excavation work machine A'Driving device body A "Excavation machine part B Traction wire means

Claims (2)

[Claims] 1. A digging work machine or a digging stirring machine capable of constructing a narrow digging hole in the ground, and a pulling wire means for pulling the digging work machine or the like in a forward direction and enabling digging in the forward direction. And a heavy machine equipped with a winding device for applying a pulling force to the pulling wire means. First, a claw type drilling metal fitting with a claw provided in a drilling work machine, etc. A vertical direction excavation process of driving a metal fitting to dig a vertical digging hole, and after the vertical digging hole is digged, through a claw-shaped drilling metal fitting, etc. of an excavation work machine located in the ground At the same time as excavating the ground in the advancing direction, through the pulling of the tow wire means, an excavation advancing step of forcibly moving the excavation work machine etc. in the advancing direction, and in the excavation hole, concrete, cement milk, etc. Concrete members A concrete material filling step of placing a concrete material and a reinforcement material press-in step of press-fitting a reinforcing steel material such as a reinforcing bar cage or a mold material after the concrete member filling step and when the concrete material is not yet hardened. Medium wall continuous wall construction method. 2. A drilling work machine or a drilling and agitating machine capable of constructing a narrow drilling hole in the ground, and a pulling wire means for pulling the drilling work machine or the like in the forward direction and enabling the drilling in the forward direction. Using a heavy machine equipped with a winding device that applies a pulling force to the pulling wire means, first, a vertical drilling metal fitting with a claw or a drilling metal stirring tool provided on an excavation work machine or the like is driven to drive it vertically. Direction excavation hole is vertically excavated, and after the vertical direction excavation hole is excavated, excavation is performed in the forward direction through a claw-shaped drilling metal fitting such as an excavation work machine located in the ground. While the pulling wire means is pulled, the excavation work machine or the like is forcibly moved in the forward direction to form a drill hole in the forward direction, and the drill hole is sequentially inserted with a vinyl sheet and concrete. , Concrete milk, concrete Underground wall that is constructed by placing a member.