JPH0457806B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology belongs to the field of construction technology for constructing continuous underground walls such as earth retaining walls and water-stop walls in the ground.

<Summary of the gist> The invention of this application, when constructing a continuous underground wall such as an earth retaining wall or a water-stopping wall in the ground, allows multiple walls to be installed along the leader of a trolley of heavy equipment such as a crawler type. A hardening agent such as mortar is ejected from the rotating shafts into the ground through the process of penetrating or pulling out the hardening agent through an auger installed at the tip of the rotating shafts arranged in parallel to feed the hardening agent. This invention relates to an underground wall construction device that constructs a continuous underground wall by uniformly mixing and stirring the hardening agent and the soil in the ground. The augers installed at each tip are formed into a tapered cone shape with the overall outer shape adjacent to each other and the vertical directions are reversed, so that the soil and the injected hardening agent are directed upward and laterally relative to the auger. This invention relates to an underground wall construction device that ensures that soil and hardening agent are uniformly mixed and stirred three-dimensionally in the ground by forcibly moving the soil and hardening agent in a zigzag pattern.

<Conventional technology> As is well known, in large-scale civil engineering construction works such as building buildings, railways, roads, etc., earth retaining walls,
It is essential to construct a continuous underground wall such as a water stop wall on the improved ground, and such a continuous underground wall is
As shown in the figure, due to construction constraints, single underground piles 1, 1... were made to partially overlap in the horizontal direction to form a continuous structure, and a continuous underground wall 2 was constructed. For efficiency, an underground wall construction device 3 as shown in Figs. 4 and 5 is used to form a predetermined auger 6 at the lower end along a leader 5 erected on a truck 4 of heavy machinery such as a crawler type. 3,
Four hollow casing pipes 7, 7... are arranged side by side in the horizontal direction, and each casing pipe is moved by a drive device 8 which is installed on the top of the leader 5 and moves up and down along the leader 5. Each casing pipe 7 is rotated while applying a downward static pressure to penetrate into the ground 9, and a predetermined hardening agent such as cement mortar (not shown) is spouted into the ground 9 from the tip of the auger 6. was raised from a predetermined depth, and the hardening agent and the soil in the ground 9 were stirred and mixed to form a continuous underground wall 2 in the ground 9.

Therefore, as shown in FIG. 6, in order for the underground piles 1 of the continuous underground wall 2 to partially overlap with each other in the lateral direction, an auger 6 formed at the lower end of each casing pipe 7 is required. must partially overlap within their rotation locus ranges.

To deal with this, the augers 6 formed at the tip of each casing pipe 7 are arranged in a zigzag shape in the horizontal direction with different phases in their vertical position arrangement, so that they overlap each other in the vertical direction. For example, the technology to make it
As disclosed in No. 58-101930, No. 58-37234, Japanese Utility Model Application Publication No. 59-89132, etc., the diameter of each auger 6 is increased, and the horizontal arrangement of the cart 4 with respect to the leader 5 is as shown in FIG. The size of the truck 4 has to be increased, and the power is also large.Furthermore, it is difficult to use it in the actual construction due to restrictions on the size of the piles 1 in each area, and the rising soil is The problem was that the mixing efficiency on the sides was poor because there was no forced displacement action on the sides.

Therefore, adjacent augers 6 are formed into tapered cone-shaped augers 61 and 62 as shown in FIG. 3, and each is provided at the lower end of the rotating shaft 10.
Forming an overlap amount of L in the horizontal direction and a phase shift amount of H in the vertical direction at the spiral portion at the upper end, narrowing the width between the rotating shafts 10, 10,
By reducing the amount of horizontal arrangement of the heavy equipment 4 with respect to the leader 5, the device 3 is made more compact and stable, and the size of the underground piles 1, 1... can be reduced, and the continuous underground wall 2 It is also designed to ensure mutual overlapping continuity.

<Problem to be solved by the invention> However, the continuous underground wall 2 according to the above-mentioned prior art
Although it is possible to achieve mutual overlap in the vertical direction in the rotation area of the augers 61 and 62 as a device in the construction of In mixing, the relative displacements of the augers 61 and 62 are mutually brought inward in the direction of the rotation axis 10, and as a result, as shown in FIG. Unable to do so.
Therefore, there is a problem in that it is difficult to ensure continuity of the underground wall 2 obtained in the ground 9.

Moreover, as shown in FIG. 3, adjacent augers 61,
When the soil 62 is opened upward and rotated, the soil, or the soil and the hardening agent, tend to move away from each other in the A direction, so that sufficient mutual mixing and agitation may not be achieved.

In order to ensure the horizontal overlap amount L of each auger 61, 62 and to obtain a sufficient vertical phase difference amount H, the rotation of each auger 61, 62 in the ground 9 Rotating axis 1
Mutual interference occurs between the augers 61 and 62 due to deflection of the augers 61 and 62, and in some cases, the augers 61 and
Another disadvantage was that the fins of 62 were damaged.

As a result, to avoid it, auger 61,
62, there is a problem that the width of the horizontal arrangement of the carts 4 with respect to the leader 5 increases, and as a result, mutual overlap between the respective piles 1, 1 of the continuous underground wall 2 is obtained. There was the inconvenience of the ironic phenomenon of not having one.

<Object of the invention> The object of the invention of this application is to solve the problems of constructing continuous underground walls such as earth retaining walls and water-stop walls based on the above-mentioned prior art, and to solve the problem of constructing continuous underground walls such as earth retaining walls and water-stop walls. The multiple augers of the rotating shafts arranged in the horizontal direction are arranged in the horizontal direction, and in addition, the vertical overlap amount of the mutual augers is sufficiently large.
The lateral mutual overlap of the various piles of the underground wall thus formed is ensured, and the continuity of the underground wall is ensured, thereby providing an excellent advantage for the field of civil engineering applications in the construction industry. The purpose is to provide underground wall construction equipment.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the structure of the invention of this application, which is based on the scope of the above-mentioned patent claims, is to solve the above-mentioned problem. Heavy machinery is brought into the specified ground where the inner wall will be constructed, and multiple rotary shafts arranged parallel to each other for supplying the hardening agent are rotated along the leader set up on the trolley, and each auger at the tip is used to ground the ground. In the penetration process, the soil in the ground is crushed and agitated, and in this process, the auger installed at the tip of each rotating shaft in the array has its entire outer shape horizontally or vertically. direction,
By forming tapered cone shapes that are mutually inverted in the lateral direction, the soil is forcibly displaced relative to each auger in a zigzag pattern upwards and laterally. As a result, cement mortar, etc. is reliably mixed and stirred not only upward but also in the left and right directions, and in the process of moving each rotation axis from a predetermined depth to the ascending process, cement mortar, etc. is released from each auger. The hardening agent is injected into the ground and mixed with the soil, but in this process, as the augers rise, the soil and hardening agent are forcibly zigzag upward and sideways relative to each auger, as described above. The soil and hardening agent are reliably mixed and stirred uniformly not only in the vertical direction but also in the lateral direction. Therefore, after the auger rises to the ground surface, the soil retaining wall is formed in the ground. Continuous underground walls such as cut-off walls or water-stop walls are ensured by ensuring that the piles partially overlap each other in the lateral direction to ensure continuity, so that the augers of the mutual lateral arrangement of heavy equipment have a predetermined diameter. Although the heavy equipment has a sufficient overlap in the vertical direction and is arranged symmetrically, technical measures have been taken to ensure that the heavy equipment is stable and can be used as compact equipment. .

<Example> Next, an example of the invention of this application will be described below with reference to FIGS. 5 and 6 and based on FIGS. 1 and 2. Incidentally, parts having the same features as those in FIGS. 3 and 4 will be described using the same reference numerals.

The embodiment shown in FIG. 1 is a basic aspect of the auger arrangement mechanism of the invention of this application, and is installed upright on the trolley 4 of the crawler type heavy equipment of the underground wall construction device 3 shown in FIGS. 4 and 5. Three hollow rotary shafts 10, 10, 10, which are also used for curing agent feeding and are arranged at equal intervals in the horizontal direction and are arranged vertically along the leader 5, are connected to arms 11, 11, which are arranged at predetermined intervals in the vertical direction.
... are connected to each other by bearings 12, 12, 12 so as to maintain a parallel alignment with each other at predetermined intervals in the lateral direction, and a feeding passage for a hardening agent such as mortar is provided inside the bearings, and at the lower end thereof. Each of them is connected to a jet hole 13 .

At the lower end of each rotating shaft 10, augers 63, 63', 6 each having two spiral fins are provided.
3 are formed in a fixed manner, and each adjacent one is formed so that its overall external shape is a tapered cone shape facing in the opposite direction in the vertical direction, and is provided close to each other.

Therefore, although the augers 63, 63', and 63 are provided sufficiently close to each other as described above, there is sufficient overlap in the vertical direction at their upper and lower ends. The auger 6 formed and installed on each rotating shaft 10
3, 63', and 63 are arranged point-symmetrically with respect to each other.

Therefore, in the conventional soil and hardening agent shown in FIG. 3, the feeding direction of each auger is opposite to the feeding direction arrow A. When moving upward, the augers 63, 63, which open upward on the left and right sides, are forced to pull inward as shown by arrow B. 63, 63', and 63 work together to cause lateral withdrawal and retraction, and the soil and hardening agent to be stirred and mixed are forced in a zigzag pattern relative to the feeding behavior of the auger, as shown by the arrow. As a result of the displacement movement, the mixing and stirring action is forcibly performed not only in the vertical direction but also in the horizontal direction.

Also, each rotating shaft 10 has an auger 63, 63',
Above the augers 63, 63, bar-shaped stirring rods 14, 14, .
63 soil in the ground 9, or soil, and
A mixing and stirring action is forcibly applied either preliminary or after the mixing and stirring of the curing agent.

In the above-mentioned configuration, when forming the continuous underground wall 2 in the ground 9, each rotating shaft 10 having an auger shown in FIG. The upper end of each rotary shaft 10 is connected to the drive device 8 to apply a downward static pressure and penetrate into the ground 9, and the hardening agent is applied to the set depth. It penetrates without gushing.

Each auger 63, 63', 63 inserted into the ground 9 crushes and stirs the soil in the ground 9 while rotating.
3, 63', and 63 are adjacent to each other as described above, and their overall external shapes are formed in the shape of an inverted tapered cone.
Each auger 63, 63', 6 in the process of upward axial movement displacement relative to 63', 63
3 are rotated in a horizontal arrangement with sufficient overlap in the vertical direction, the crushed soil is forced to behave upward in a zigzag pattern, as shown in Figure 1B. In other words, from the downward-opening auger 63' in the central position, the upwardly-opening auger 63,
63, and the top-opening augers 63, 63 on both sides forcibly engulf the crushed soil rising from the auger 63' in the center, so that each auger 63, 63',
The crushed soil displaced upward in the axial direction from 63 intermingles with each other in the horizontal and vertical directions, and sufficient mutual mixing and stirring is forcibly performed, and furthermore, each stirring rod 14, 14... assists in mixing and stirring them.

Thus, each auger 63, 63',
As the ground 9 of 63 descends, stirring and mixing for forming a continuous underground wall 2 is preliminarily performed in the ground 9, and when a predetermined depth is reached, hardening of mortar etc. is carried out in each rotating shaft 10. By supplying a prescribed amount of the agent and ejecting it into the ground 9 from the jet hole 13 at the lower end, and pulling it up while applying a rotational action to each auger 63, 63', 63, the soil is removed in the same way as in the above-mentioned process. The curing agent is mutually mixed and stirred, and is forcibly displaced in a zigzag manner relative to each auger 63, 63'63 in the vertical and horizontal directions, as shown in B, and is reliably moved not only in the vertical direction but also in the lateral direction. Each auger is 63,63'6
The underground piles 1 of 3 are laterally overlapped with each other to form a sufficient overlapping amount in the ground 9 to form a continuous underground wall 2.

After the augers 63, 63', and 63 appear on the ground surface, a solid continuous underground wall that overlaps each other is formed over time due to solidification, and the heavy equipment truck 4 moves to the next step to complete the above-mentioned process. By repeating this process, a continuous underground wall 2 such as an earth retaining wall or a water stop wall is formed in which the underground piles 1, 1, . . . sufficiently overlap each other as shown in FIG. 6.

Further, the embodiment shown in FIG. 2 has three rotating shafts 10,
Augers 63 and 63' whose overall outer diameters have tapered cone shapes that are opposite to each other in the axial direction of 10 and 10, respectively.
Therefore, the upper and lower augers 63 and 63' of the two stages have their tapered cones reversed with respect to the rotating shaft 10 that is coaxial in the vertical direction. Not only do
Regarding the mutually adjacent rotating shafts 10, 10, 10, the adjacent augers 63, 63', 63 are also arranged in mutually opposite tapered cone shapes, and therefore, Continuous underground walls 2 such as water-stop walls and earth retaining walls are installed in the ground 9 using the auger of this embodiment.
, the relative moving paths for mixing and agitating the soil and curing agent with respect to each rotary shaft 10 are more reliable not only in the vertical direction but also in the lateral direction, as shown in B' and B', compared to the above embodiment. They will follow a zigzag course where they are forcibly mixed and stirred, and in the continuous underground wall 2 of the earth retaining wall or water stop wall, each underground pile 1, 1
Not only is sufficient mutual overlap between the piles 1 and 1 formed, but also the forced mixing and agitation is carried out to ensure that the soil and hardening agent between the piles 1, 1... are sufficiently mixed with each other. As a result, the quality and accuracy of the continuous underground wall 2 to be formed will definitely be improved.

It should be noted that the embodiment of the invention of this application is of course not limited to the above-mentioned embodiments, and the stirring bars 14, 14... shown in FIG. 1 are provided between the upper and lower double augers shown in FIG. Various arrangements can be adopted, such as making the diameters, sizes, and pitches of augers that are adjacent to each other in the vertical and horizontal directions not only the same but also different.

<Effects of the Invention> As described above, according to the invention of this application, a continuous underground wall formed when constructing a continuous underground wall such as an earth retaining wall or a water-stopping wall on a sloping land or ground improved ground. Not only does it ensure mutual overlap in the lateral direction of the piles in each area, but it also ensures that the interior of each pile and the overlap area is in a mixed and agitated state where not only the soil but also the hardening agent are mixed. , therefore, the accuracy of the continuous underground wall formed,
And, the quality is further improved and the excellent effect of promoting trust in the continuous underground wall is achieved,
Later, the excellent effect of improving the reliability of buildings, roads, railways, etc. formed on the ground will be achieved.

Therefore, when a continuous underground wall is formed in various places in the ground by an auger, the relative displacement of the soil and the ejected hardening agent to the auger, which make up the continuous underground wall in each place, is forced vertically and laterally. In order to create a zigzag shape, not only the preliminary stirring of the soil before the curing agent is ejected, but also the mixing and agitation of the curing agent and soil after the curing agent is ejected is performed three-dimensionally. First, an excellent effect can be obtained in that the intermingling effect can be obtained even in the lateral direction.

In addition, since the taper cone shapes of the overall external shapes of the augers installed not only in the horizontal direction but also in the vertical direction are tapered in opposite directions, not only the amount of mutual overlap is ensured, but also the auger Even if the augers are brought close to each other by a considerable amount, the augers do not interfere with each other, and there is also the effect that failure or severe wear of the device does not occur.

[Brief explanation of drawings]

FIG. 1 is a partially enlarged side view of one embodiment of the invention of this application, FIG. 2 is a schematic side view of another embodiment equivalent to FIG. 1, and FIG. 3 is a mutually overlapping side view of an auger based on the prior art. FIG. 4 is a schematic side view of the underground wall construction device, FIG. 5 is a front view thereof, and FIG. 6 is a partially sectional plan view of the continuous underground wall. 9...Ground, 63,63'...Auger, B,
B'... Zigzag movement.

Claims (1)

[Scope of Claims] 1. A plurality of augers are provided at the tip of each of the rotating shafts arranged in parallel and also used for feeding the hardening agent, and the augers are adjacent to each other in the horizontal direction and have rotation areas that partially overlap in the vertical direction. In the underground wall construction equipment, each auger has a tapered cone shape in its overall external shape in the vertical direction, and the tapered cone shapes of adjacent augers are formed in opposite shapes to each other in the vertical direction. An underground wall construction device featuring: 2. The underground wall construction apparatus according to claim 1, wherein the augers of each of the rotating shafts are provided in a plurality of upper and lower stages in the axial direction. 3. The underground wall construction device according to claim 2, wherein the tapered cone shapes of the overall external shapes of each of the plurality of augers are vertically adjacent to each other and formed in an inverted tapered cone shape. 4. The underground wall construction device according to claim 1, wherein the auger of the rotating shaft is formed as a plurality of spiral fin augers.