JP2557562B2 - How to lay a gutter pipe for dikes - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of laying a gutter pipe for a dike that is buried across a dike for water intake from a river or removal of water in the dike into the river. is there.

Conventional technology Conventionally, in order to lay this type of gutter pipe, a predetermined part of the embankment was cut open, a gutter pipe was installed in the cut part so as to cross the dike, and then the earth and sand of the cut part was backfilled to the gutter pipe. The method of burying the pipe is adopted.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the conventional method of laying a gutter pipe for a dike as described above, since the dike is opened and cut, the ground tends to loosen after laying the gutter pipe, and the earth and sand are backfilled in the cut portion. There is a drawback that the construction period becomes long due to work and so on. In addition, if the road is on the embankment, there is also the inconvenience that traffic must be cut off during the entire construction period.

Therefore, the present invention aims to solve such problems, to provide a method of laying a dike gutter pipe that can strengthen the ground and shorten the construction period, and that does not interrupt traffic on the dike. To do.

Means for Solving the Problems In order to achieve the above object, the present invention constructs a water barrier by laying a plurality of continuous piles along a dike at a place for laying a gutter pipe on the dike. The gutter pipe is propelled in a direction that traverses, the gutter pipe is embedded in the levee in a state of penetrating the water barrier, and from the grout holes formed at both ends of the gutter pipe, between the levee and the gutter pipe and A chemical solution is injected to seal between the water blocking wall and the gutter pipe, and after confirming that the chemical solution has come out from the grout hole formed in the central part of the gutter pipe, the grout hole in this central part is closed, and then Further, the liquid medicine is injected to cure the liquid medicine.

Action In this way, a water barrier wall with continuous piles is constructed in the embankment, and a gutter pipe is propelled into the embankment so as to penetrate it, so compared to the method of excavating the embankment, Less loosening. Moreover, since the work of backfilling the earth and sand is not required, the construction period is shortened, and even if the road is on the embankment, there is almost no hindrance to traffic except for the period when piles are laid. Furthermore, since the water blocking wall is constructed by the pile and then the gutter pipe is propelled, water leakage is prevented during or after the propulsion. Further, since the chemical liquid is injected and cured between the bank and the gutter pipe and between the water blocking wall and the gutter pipe, the gutter pipe and the levee and the water blocking wall are surely brought into close contact with each other. At that time, the chemical solution was injected from the grout holes formed at both ends of the gutter tube, and it was confirmed that the chemical solution came out from the grout hole formed in the central part of the gutter tube and the center part was closed. Since the chemical solution is further injected after that, the air is surely released through the grout hole in the center, and the chemical solution is injected without forming a void. Then, since the chemical solution is simultaneously injected through the grout holes at both ends of the gutter pipe, the injection work can be performed efficiently.

Example FIG. 1 to FIG. 5 are views for explaining a method of laying a dike pipe for embankment according to the present invention.

Prior to laying a gutter pipe on the bank, first, as shown in FIG. 2, a chemical solution is injected into the ground 1a at the place where the gutter pipe is laid on the bank 1, so as to improve the ground.

After this ground improvement, as shown in FIG. 3, a water blocking wall 4 is formed at the location of the gutter pipe on the embankment 1. As shown in FIG. 4, by using the CCP method, the water blocking wall 4 is formed by placing a plurality of piles 5 obtained by injecting a hardening material into the boring hole after boring so as to be continuous in the direction along the bank 1. Be built.

Next, as shown in FIG. 5, the gutter pipe 2 is propelled in a direction traversing the bank 1, and the water blocking wall 4 is penetrated to be embedded at a predetermined position. Specifically, a ductile tube is used as the gutter tube 2 to propel it. In this case, avoid digging with the blade as much as possible, and discharge only the sand that has entered the pipe. Moreover, when penetrating the water blocking wall 4, it is destroyed and promoted.

After the promotion of the gutter pipe 2, backfill injection is performed as a seal for ensuring the close contact between the bank 1 and the gutter pipe 2 and between the water blocking wall 4 and the gutter pipe 2. In this case, in order to make the laid portion of the gutter pipe 2 a permanent structure, a cement type chemical solution 6 as shown in FIG. 1 is injected. Specifically, as shown in FIG. 1, after completely sealing the respective well openings 7a and 7b of the starting pit and the reaching pit, the cap (not shown) of the grout hole 8A immediately below the water blocking wall 4 is closed. Remove and inject the chemical solution 6 through the grout holes 8B, 8C at both ends of the gutter tube 2. By doing so, it is possible to surely perform the air bleeding through the grout hole 8A. After that, when the chemical solution 6 starts to drip from the grout hole 8A in the central portion of the gutter pipe 2, the grout hole 8A is closed and the injection of the chemical solution 6 is continued. In this way, since the chemical liquid 6 is simultaneously injected from the grout holes 8B and 8C at both ends of the gutter pipe 2, the injection work can be performed efficiently. Then, when the chemical liquid 6 is cured, the sealing is achieved and the laying of the gutter pipe 2 is completed.

Here, after forming the water barrier wall 4 by the CCP piles 5 on the embankment 1, the gutter pipe 2 is propelled into the embankment 1 so as to penetrate through it, so that the gutter pipe 2 is laid without excavating the embankment 1. can do. There is also an advantage that the ground wall 1a is strengthened by the water barrier wall 4. Moreover, as described above, since the ground is strengthened by injecting the chemical solution into the bank 1 in advance, it is possible to more surely prevent the ground from loosening after the gutter pipe 2 is laid. Furthermore, the water barrier 4 and the chemical solution 6
By the action of, the water leakage between the inside and outside of the embankment 1 is reliably prevented.

Further, as compared with the work of excavating the embankment 1 and backfilling with the earth and sand, the work of placing the piles 5 by the CCP method and the work of propelling the gutter pipe 2 can be performed quickly, so that the laying construction period is shortened. Furthermore, even if a road is on the embankment 1, there is no need to block traffic except when the piles 5 are formed by the CCP method.
There are advantages to avoiding traffic disruptions.

EFFECTS OF THE INVENTION As described above, according to the present invention, a water barrier wall is provided on a bank by a plurality of continuous piles, and a gutter pipe is propelled and embedded in the bank so as to penetrate the ground wall. There is no risk of loosening of the gutter, moreover, it is possible to lay a gutter pipe in a short period of time, and there is little obstruction to traffic on the embankment during the construction. Water leakage can be prevented, and since a chemical is injected between the levee and the gutter pipe and between the water barrier wall and the gutter pipe to harden it, the water leakage between the gutter pipe and the levee and the water barrier is prevented. Can be firmly adhered, and at that time, the chemical solution is injected from the grout holes formed at both ends of the gutter tube, and it is confirmed that the chemical solution comes out from the grout hole formed in the central part of the gutter tube. Close the grout hole in the center of the lever, Since the chemical solution is further injected after that, air can be reliably vented through the grout hole in the center, and the chemical solution can be injected without creating voids.
Since the chemicals are simultaneously injected through the grout holes on both ends of the gutter pipe, the injection work can be performed efficiently.

[Brief description of drawings]

1 to 5 show an embodiment of a laying method based on the present invention, and FIG. 1 is a sectional view showing a laying completion state, and FIGS.
FIG. 5 is a cross-sectional view for sequentially explaining the work steps up to the state of FIG. 1 ... levees, 2 ... gutter pipes, 4 ... water barriers, 5 ... piles.

Claims (1)

(57) [Claims] 1. A plurality of stakes that are continuous along the embankment are laid at a place where the gutter pipe is laid to construct a water barrier, and the gutter pipe is propelled in a direction crossing the embankment. A chemical solution in which a gutter pipe is embedded in the dike while penetrating the water barrier, and the grout holes formed at both ends of the gutter pipe seal the space between the dike and the gutter pipe and between the water barrier and the gutter pipe. After confirming that the chemical solution has come out from the grout hole formed in the central part of the gutter pipe, close the central grout hole and then inject more chemical solution to cure the chemical solution. A method for laying a gutter pipe for embankment, which is characterized in that