JPH0141777B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a construction method for moving and modifying underground pipes, structures, and other underground objects without digging up the soil.

(Prior art) Conventionally, a mixture of water glass, cement, water, etc. has been used on the underside of the pipe as a main step to correct slack in underground pipes caused by uneven subsidence of the ground, etc., without digging up the soil. A known method is to inject and solidify a solidified material consisting of a pipe, thereby pushing up the sagging portion of the pipe.

However, in this case, there were drawbacks such as not only a large amount of solid material being required to inject enough solid material to overcome the earth pressure, but also the amount of material to be injected could not be determined and the construction period would be long.

(Object of the invention) The object of the present invention is to eliminate the above-mentioned drawbacks, to use an expanding material as an injected material to move buried objects, and to correct the movement of underground objects before the injection process. A guide space is formed in the direction in which the buried object is moved, making it easy and reliable to correct the movement of the buried object. Furthermore, the amount of inflatable material to be injected is not only small, but also the amount of inflatable material to be injected can be determined and the construction period can be shortened. The purpose is to provide a movement correction method, and in particular, to provide a construction method that can easily and accurately form a guiding space and that does not cause any risk of disturbing the composition or stratigraphy of the ground that is not the target. be.

(Structure of the Invention) The method for moving and correcting underground objects of the present invention is a method for moving and correcting underground objects in which an expanding body is injected into the opposite side of the direction in which the movement of the underground objects is to be corrected, and the expansion force is used to move and correct the buried objects. In this method of correcting the movement of objects, before the step of injecting the expandable body, one tube is inserted until the tip reaches the area where the guide space is to be formed in order to form a guide space in the direction in which the movement of the buried object is to be corrected. Alternatively, a plurality of casing pipes are inserted, and a feed pipe having a nozzle at the tip is lowered from the casing pipe to eject pressure fluid into the area where the induction space is planned to be formed, and soil is discharged from the casing pipe along with the pressure fluid. This is what I did.

In that case, if there is one casing pipe, soil, etc. will be discharged from the space between its inner wall and the feed pipe, and if multiple casing pipes are inserted, soil, etc. will be discharged from the other casing pipe. be done.

(Example) An example of the present invention will be described based on the drawings. In the figure, A indicates an underground object such as a pipe or a structure, and the direction in which the movement of the underground object A is to be corrected may be vertical, horizontal, or the like. For example, even if sagging occurs in existing pipes due to uneven ground subsidence, the shape is not uniform, and as shown in Figure 1, between manholes MH1 and MH3, from the original buried pipe position 1A to In some cases, the current location has sunk to 2A, causing swells throughout the area. In such cases, rather than lifting the whole
It may be advantageous to lift up the 1P area and push down the 2P and 3P areas to move to the correction position 3A for correction. Furthermore, since there is meandering in the horizontal direction, it may be necessary to correct the movement in the horizontal direction.

In the figure, reference numeral 1 denotes an expanding body press-in pipe inserted to press-fit an expanding body B such as an expanding solidifying material to the opposite side of the direction in which the underground object A is to be moved and corrected.

In the present invention, a guiding space is formed in the direction in which the underground object A is to be moved before the expanding body B is press-fitted by the expanding body press-in pipe 1. The formation is carried out using the following method.

First, as shown in Figure 2, underground object A is
Let's look at the case of moving to position A'.

As shown in FIGS. 2 to 4, the first construction method involves inserting a casing pipe 2 so that it can be raised and lowered until its tip 2a reaches the area S where the guide space is to be formed. The pipe 3 is lowered from the casing pipe 2 and the press-fit pump is installed.
A pressure fluid W such as water or air is ejected through the WP into the region S where the guide space is to be formed, thereby cutting the soil in the region S where the guide space is to be formed to form the guide space. The cut soil C is discharged from the space 5 between the inner wall 2b of the casing pipe 2 and the feed pipe 3 together with the pressure fluid. In this case, if the soil is difficult to discharge due to the geology, it goes without saying that the soil may be suctioned and discharged from the upper end of the casing pipe 2 via a pump. This construction method can be used when the amount of movement of the underground object A is relatively small.

As shown in Fig. 5, when pushing down the underground object A, a guidance space is formed below the underground object A. A plurality of casing pipes are symmetrically inserted at predetermined intervals on the sides as shown in FIG. Then, these casing pipes are selected, one side is used as the input pipe 2, and the other side is used as the output pipe 12, and the feeding pipe 3 is lowered from the casing pipe 2 to pressurize the pressurized fluid W, and the cutting is performed. The soil C etc. that have been removed are discharged from the other pipe 12. In this case as well, it can be sucked and discharged via the pump P or the like.

Figure 7 shows the case where underground object A is moved laterally using the second construction method. In this case, multiple casing pipes are inserted in the direction of movement and each pipe is selected. use.

As shown in FIG. 8, the jet ports 4a, 4a of the nozzle 4 are formed at intervals of 90 degrees or 45 degrees, and when the cutting range is 180 degrees, the jet ports 4a, 4a are formed at 90 degrees.
Also, if the cutting range is 90 degrees, the 45 degree one is
Each is used and rotated to obtain a predetermined cutting angle.

(Effect of the invention) According to the method for moving and correcting underground objects of the present invention,
Before the step of injecting an expanding body to move the buried object, a casing pipe is inserted to form a guiding space in the direction in which the buried object is to be moved, and a feeding pipe with a nozzle at the tip is inserted into the casing. This is a construction method in which the soil is cut by lowering it from a pipe and ejecting pressure fluid into the area where the induction space is planned to be formed, and the soil is discharged through a casing pipe to form the induction space. It is possible to form a guidance space accurately without the risk of unnecessarily disturbing the structure and stratigraphy of the ground that is limited and not targeted. In addition, by measuring the amount of soil discharged to the ground, it is possible to predict and estimate the formation status of the guidance space, and it is possible to form the guidance space necessary for moving underground objects, and inject the expandable material. When doing so, it is only necessary to inject the amount corresponding to the induction space, and not only can the injection amount be determined, but also the injection amount can be reduced because unnecessary amounts can be prevented from being injected.

Furthermore, by inserting multiple casing pipes, it is possible to select one of them and pressurize fluid into one pipe, while discharging soil along with the pressure fluid from the other pipe. By appropriately changing and selecting the input hole and the output hole until the space is formed, the guide space can be easily and accurately formed.

[Brief explanation of drawings]

The drawings show an example of a device used to implement the method for moving and correcting underground objects according to the present invention, and FIG. 1 is a schematic diagram for explaining the direction of moving and correcting buried pipes, and FIG. 2 is a cross-sectional view. Figure 3 is an enlarged cross-sectional view, Figure 5 is a cross-sectional view showing another example, Figure 4 is a cross-sectional view of the casing pipe and feeding pipe, and Figures 6 and 7 show the arrangement position of the casing pipe. The plan view shown in FIG. 8 is a sectional view of the nozzle. A: Underground object, B: Expandable body, C: Soil, S: Guidance space formation area, 1: Pressure fluid injection pipe,
2, 12: Casing pipe, 3: Feeding pipe,
4: Nozzle, 5: Space.

Claims (1)

[Claims] 1. When moving or modifying a pipe, structure, or other underground object, an inflatable body is injected into the opposite side of the direction in which the buried object is to be moved, and the expansion force of the inflatable body moves the buried object. This is a method for moving and correcting underground buried objects, in which, before the step of injecting the expandable body, the tip is used to form a guiding space in the direction in which the buried object is to be moved. A casing pipe is inserted into the soil until it reaches the planned area, and a feeding pipe having a nozzle at the tip is lowered from the casing pipe to eject pressure fluid into the area where the induction space is planned to be formed, thereby cutting the soil. A method for moving and repairing underground objects characterized by forming a guiding space by discharging soil together with pressure fluid from the space between the inner wall of the casing pipe and the feed pipe. 2. When moving or correcting pipes, structures, or other underground objects, an inflatable body is injected into the opposite side of the direction in which the buried objects are to be moved, and the underground objects are moved and corrected by the expansion force of the expandable body. This is a construction method for moving and modifying buried objects, in which, before the step of injecting the expandable body, in order to form a guiding space in the direction in which the buried object is to be moved, the tip is moved until the tip reaches the area where the guiding space is to be formed. Cutting the soil by inserting a plurality of casing pipes into the soil, lowering a feed pipe having a nozzle at the tip from one of the casing pipes and spouting pressure fluid into the area where the induction space is planned to be formed;
A method for moving and repairing underground objects, characterized by forming a guiding space by discharging soil together with pressure fluid from the other casing pipe. 3. The method for moving and repairing underground objects according to claim 2, characterized in that soil is sucked and discharged together with pressure fluid from the other casing pipe.