JPH0141776B2 - - 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, as a means of correcting slack in underground pipes due to uneven subsidence of the ground, etc. without digging up the soil, a mixture of water glass, cement, water, etc. has been applied to the bottom of the pipes. A known construction method involves injecting solidified material to push up the slack portion of the pipe, solidifying and fixing the solidified material.

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.

As a means to eliminate the above-mentioned drawbacks, it is possible to loosen the soil by injecting and ejecting a pressurized fluid such as water or air around the buried object before the step of injecting the solidified material. In such a case, simply ejecting water or the like may not only unnecessarily disturb the composition and stratigraphy of the ground that is not the target, but also cause the buried objects to be exposed to resistance from the soil even though they have been loosened. There is a risk that the movement will not be carried out properly.

(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. By spouting pressurized water through the casing pipe in the direction in which the object is to be moved, a muddy area is formed so that the movement of the buried object can be easily and reliably corrected. By discharging mud from the casing pipe using the pressure during movement, it is possible to reduce the resistance when moving buried objects, and not only can the amount of inflatable material injected be 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 construction method for moving and correcting buried objects, and in particular, to provide a construction method that can easily and accurately form muddy areas without disturbing the composition or stratigraphy of the non-target ground. It's about doing.

(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. This is a method for correcting the movement of objects, and before the step of injecting the expandable body, in order to form a muddy area in the direction in which movement of the buried object is to be corrected, the tip of the buried object must be moved until the tip reaches the area where the muddy area is to be formed. Inserting one or more casing pipes, lowering a feeding pipe having a nozzle at the tip from the casing pipe and spouting pressurized water into the area where the muddy part is to be formed, thereby forming a muddy part; Mud is discharged from the casing pipe using the pressure when the buried object moves due to the expansion of the expanding body.

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

(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 sag occurs in a buried pipe due to uneven ground subsidence, the shape is not uniform, and as shown in Figure 1, between manholes MH1 and MH3, from the original position 1A of the buried pipe 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, before press-fitting the expansion body B using the expansion body press-in pipe 1, a mud-like portion is formed on the side in the direction in which the underground object A is to be moved. The formation of the shaped part 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 muddy portion is to be formed, and then inserting a casing pipe 2 having a nozzle 4 at its tip. The feed pipe 3 is lowered from the casing pipe 2 and the press-fit pump is installed.
Pressure water W is ejected through the WP into the area S where the muddy part is to be formed, thereby forming a muddy part.

In this state, when an expanding solidifying material is injected to the opposite side of the direction in which the movement of the buried object is to be corrected, the buried object A will move toward the muddy area due to its expansion force, and the mud will be pushed away from the inner wall of the casing pipe 2 by the pressure. 2b and is discharged from the space 5 between the feed pipe 3. As a result, the buried object A can be moved appropriately since there is no large resistance in the muddy area. In this case, if the mud is difficult to discharge due to the geology, it is of course possible to suction the mud from the upper end of the casing pipe 2 via a pump and discharge it. 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 muddy part is formed under the underground object A. A plurality of casing pipes are inserted symmetrically to the sides of A at predetermined intervals 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 blow out the pressure water W to remove the mud. form a shaped part. When the buried object A is moved, the mud C is 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 muddy part formation range is 180 degrees, the jet ports 4a, 4a are formed at intervals of 90 degrees or 45 degrees. , 45 if the mud formation range is 90 degrees
A predetermined slurry formation angle is obtained by rotating the 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, insert a casing pipe to form a muddy part in the direction in which the buried object is to be moved.
A feeding pipe with a nozzle at the tip is lowered from the casing pipe and pressurized water is jetted into the area where the muddy part is to be formed, thereby forming a muddy part, and reducing the pressure during the movement of buried objects due to the injection of the expanding body. Since this is a construction method in which mud is discharged through a casing pipe, the area in which muddy areas are formed is limited, and there is no risk of unnecessarily disturbing the composition and stratigraphy of the ground that is not the target. It is possible to accurately form the muddy part. In addition, by injecting an inflatable material, when the buried object is moved, mud is discharged from the casing pipe to the ground due to the pressure, so the resistance acting on the buried object is reduced, and a large amount of inflatable object is not required. Therefore, the buried object can be moved appropriately. Even if some mud remains on the sides of the buried object, it will eventually solidify and become the material for fixing the buried object, so there is no risk of unnecessary space being formed.

When injecting the expansion material, it is sufficient to inject the amount corresponding to the muddy part, and not only can the injection amount be determined, but it can also prevent unnecessary injection, so the injection amount can be reduced. can do.

Furthermore, by inserting multiple casing pipes, pressurized water is ejected from one pipe through the feed pipe to select one of them to form a muddy area, and the other pipe is muddy. It can be used as a discharge pipe, and by appropriately changing and selecting each of the pipes described above until the planned formation of the muddy part is achieved, the muddy part can be formed easily and accurately.

[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 sectional view, Figure 4 is a sectional view showing another example, Figure 5 is a sectional view of the casing pipe and feed 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: Mud, S: Area where muddy part is planned to be formed, 1: Expandable body press-in pipe, 2,1
2: 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, and before the process of injecting the above-mentioned expandable body, the tip is muddy to form a muddy part in the direction in which the buried object is to be moved. A casing pipe is inserted into the soil until it reaches the area where the muddy area is to be formed, and a feed pipe with a nozzle at the tip is lowered from the casing pipe to spray pressurized water into the area where the muddy area is to be formed. A method for moving and correcting underground buried objects, characterized in that mud is discharged from the casing pipe by the pressure generated when the buried object is moved due to the expansion of an expanding body. 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 object is to be moved, and the underground object is moved and corrected by the expansion force of the inflatable body. This is a construction method for moving and modifying buried objects, in which, before the process of injecting the expandable body, the tip reaches the area where the muddy area is to be formed in order to form a muddy area in the direction in which the buried object is to be moved. A muddy area is formed by inserting multiple casing pipes into the soil up to the point where a feeding pipe with a nozzle at the tip is lowered from one of the casing pipes and spouting pressurized water into the area where the muddy area is planned to be formed. A method for moving and correcting underground buried objects characterized in that, when the buried object is moved due to the expansion of the expanding body, mud is discharged from the other casing pipe using the pressure.