JPH0546409B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for stabilizing soft ground, etc.

(Prior Art) Currently, sand drains, fabrication drains, sand compaction methods, etc. are being used as methods for improving soft ground.

(Problem to be solved by the invention) However, the deformation of the ground due to embankment is a lateral sliding phenomenon accompanied by lateral flow, which destroys the ground, but the conventional construction method described above does not solve this problem. insufficient consideration was given to this point.

(Means for Solving the Problems) The present invention has been proposed to solve the above problems, and it is aimed at solving the above-mentioned problems. The foundation structures to be connected are connected by a connecting member that is inserted into a hole that penetrates the structure and is dug diagonally into the ground from the ground level, and that intersects diagonally with each of the above-mentioned structures. This is related to the characteristic ground stabilization method.

(Function) The present invention provides wires and anchors that diagonally cross each structure between opposing foundation structures constructed of piles, sheet piles, underground continuous walls, etc. that penetrate or are constructed in the ground in the lower part of the embankment. By connecting with connecting materials such as wires or anchors, an integrated underground structure surrounded by each of the above-mentioned foundation structures is constructed underground, and the connecting materials such as wires or anchors The axial resistance force suppresses lateral flow of the ground, and the integrated underground structure prevents uneven settling of the ground.

In this way, when connecting opposing foundation structures with a connecting member diagonally crossing them, a hole is drilled diagonally into the ground from the ground level, and a hole is provided that penetrates the structure. Since the connecting member is inserted into the hole and diagonally intersects with the structure, the connecting member can be easily attached to the existing foundation structure member in the diagonal direction.

(Effects of the Invention) As described above, according to the present invention, by a simple configuration in which foundation structures built in the ground are connected by connecting members diagonally intersecting each other, it is possible to Flow and uneven settlement can be effectively prevented.

Further, according to the present invention, as described above, the connecting member obliquely intersecting the basic structure with the same structure,
It can be connected more easily than above ground.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Piles, sheet piles,
In addition to constructing basic structures such as underground continuous walls,
The opposing foundation structures 1 and 2 are connected by a connecting member 3 such as an anchor or a wire.

For this connection, as shown in FIG. 2, boring is performed in the ground in an oblique direction, and when the borehole reaches the foundation structure 1, the drilling is stopped. At this time, while boring, insert the guide pipe 4 into the borehole.
is inserted. (See Figure 3) If the foundation structure 1 is made of unreinforced concrete, a hole is drilled in the portion 1a using a diamond core cutter, and then the wire 5 is inserted into a pair of fork-shaped locking pieces 6.
Wire attachment part 6 where a ₁ and 6a ₂ are attached so that they can be opened and closed
After inserting the insertion pipe 5', which is fixed to the guide pipe 4 and has the wire 5 built in therein, and which is screwed to the attachment part 6b and has the wire 5 built in, and the tip attachment part 6b is penetrated through the part 1a, The shaped locking pieces 6a ₁ and 6a ₂ are expanded to lock the tip of the wire 5 to the portion 1a. Next, concrete is poured into the guide pipe 4 to fix the tip of the wire 5 to the portion 1a.
(See Fig. 4) Fig. 6A shows the opening/closing mechanism of the locking piece 6a, and shows the rotating shaft 6 fixed to the tip of the mounting portion 6b.
Rotary discs 6d and 6d' are rotatably mounted above and below c, and locking pieces 6a ₁ and 6a ₂ are provided at the eccentric positions of the leading ends of the rotary discs 6d and 6d', and stoppers 6e are provided at the eccentric positions of the rear ends of the rotary discs 6d and 6d'. ₁ and 6e ₂ are respectively protruded in parallel with the pipe 5, and when inserted in the direction A in Fig. 6A, the locking piece 6
a ₁ and 6a ₂ receive a reaction force from the ground in the direction B,
The locking piece 6a 1, the stopper 6e ₁ , the locking piece 6a ₂ , and the stopper 6e ₂ rotate together with the rotary disks 6d and 6d' in the C direction and the C' direction, respectively, and the locking piece 6a _{1 rotates.} , 6a ₂ are held in the expanded position.

Furthermore, when the above-mentioned diagonal boring is performed with the foundation structure 1 section first excavated and filled with bentonite, the wire is pulled after concrete is placed in the excavation hole, and the concrete is placed in the guide pipe. Pour concrete.

After the tip of the wire 5 is thus fixed to the basic structure 1, the base end of the wire 5 is fixed to the basic structure 2.
Fix it to the top of the board using appropriate means.

Similarly, other wires are fixed to the upper and lower parts of the foundation structures 1 and 2, and in this way, the foundation structure under the embankment ground E is integrated with the wires, and the ground surrounded by the same foundation structure is integrated into one ground. As a medium-sized structure, it prevents lateral movement of the ground and uneven settlement, and stabilizes the ground.

7 to 12 show an embodiment in which the present invention is applied when piles P and P' as a foundation structure reach the supporting ground A, and in FIG. C is an improved or concrete slab part, and the upper part p of the pile P and the middle part q' of the pile P',
Connect the lower part r' with connecting members X' and Y' made of wire etc., and connect the upper part p' of the pile P' with the middle part q and lower part r of the pile P with connecting members X and Y made of wire etc. Then, the ground surrounded by the piles P and P' at the bottom of the embankment E is used as one underground structure to prevent lateral movement and uneven settlement of the ground. Further, buckling is prevented by connecting the intermediate portions of the piles P and P' with a connecting member.

Figure 8 shows a case where the ground section C directly under the embankment E is unimproved.The soil of the embankment E sinks into the ground and the ground bulges out to the side, so the pile P section and the pile
Although the '' section of P' tries to move in the directions shown by arrows F and G, the connecting members X' and X prevent the respective pile sections from moving.

In Figure 9, the ground portion C is untreated, so the pile heads of piles P and P' are connected with wire H in order to prevent displacement of the pile heads.In this case, connecting materials Y and Y' This prevents piles P and P' from bulging due to ground flow.

Fig. 10 shows a case in which the piles P and P' are supported on the supporting ground A without penetrating into the supporting ground A in the embodiment shown in Fig. 7, and the connecting members X, Y and X', Y ' prevents the pile P' and the pile P from lateral displacement and buckling.

FIG. 11 shows a case in which the piles P and P' are supported on the supporting ground A without penetrating into the supporting ground A in the embodiment shown in FIG. 8, and the connecting members X,
Y, X', and Y' prevent the piles P, P' from slipping and shifting laterally.

FIG. 12 shows the pile P in the embodiment shown in FIG.
This shows the case where P' is supported on the supporting ground A without penetrating into it, and the wire H connecting between the pile heads of piles P and P' and the connecting materials H, Y and X', Y ′ prevents lateral displacement of the piles P and P′.

Figure 13 shows the case where the piles P and P' do not reach the supporting ground, and the connecting material Y, between the upper and lower ends of the piles P and P',
By connecting Y', the starting point of the slip start line is the lower end point of the pile P', and the piles P, P' and the connecting member Y,
The lower part L of the underground integrated structure surrounded by the same piles P and P' by Y' is the active region, the part M on the side of the same part is the passive region, and the part above the same part M N can be suppressed to form an embankment area.

If this construction method is not used, slipping will occur due to the active area L and passive area M, as shown in FIG. This shows that by applying the method of the present invention, the ground can be stabilized by the holding embankment area N.

By configuring the improved ground C ₁ and C ₂ between the upper and lower ends of the piles P and P', the underground integrated structure structurally approaches a caisson and is further stabilized.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the implementation status of one embodiment of the ground stabilization method according to the present invention, Figs. 2 to 4 are longitudinal sectional views showing the process of attaching the connecting member, and Fig. 5 is the wire attachment member. 6A and 6.
Figure B is a plan view showing the wire attachment member in the closed and expanded state of the fork-like locking piece, and Figures 7 to 13 are longitudinal cross-sectional views showing each embodiment of the method of the present invention. FIG. 14 is an explanatory diagram of a case where the construction shown in FIG. 13 is not performed. 1, 2...Foundation structure, 3...Connecting material, P,
P'...Pile, X, X', Y, Y'...Connection material.

Claims (1)

[Claims] 1. A hole drilled from above ground in an oblique direction between opposing foundation structures consisting of piles, sheet piles, underground continuous walls, etc. that have penetrated or been constructed into the ground, and that penetrate the same structure. A ground stabilization construction method characterized in that the ground stabilization construction method is characterized in that the construction is connected by a connecting member that is inserted into the structure and diagonally intersects with each of the structures.