JP3133853B2 - How to correct the displacement of a buried pipe by uncutting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for correcting a gas pipe, a water pipe, or the like buried underground due to land subsidence, etc., by displacing the gas pipe or water pipe to its original position.

[0002]

2. Description of the Related Art If a gas pipe buried in the ground is displaced due to land subsidence or the like and left as it is, it may cause a gas leak or the like. Is exposed, and correction is performed using a tool. For this reason, problems such as excavation cost, time, and traffic obstruction occur. Therefore, a scope method is known as a means for correcting displacement by non-cutting. This scope method is a method of correcting a displacement by injecting a correction infusion liquid into a displaced portion of a buried pipe and moving the buried pipe by applying a stress in a correction direction to the buried pipe by the injection liquid pressure.

[0003]

However, the conventional scope method has the following problems when applied to gas conduits, water pipes and the like.

A. Since the amount of movement of the pipe during the correction work is not known, it is difficult to move the pipe to an appropriate position, and experience is required.

B. As a pretreatment for moving the pipe, the moving direction of the pipe is muddy by a water jet. At this time, the coating (plastic coating and asphalt coating) on the pipe is damaged or deteriorated by the water jet.

C. When the injection liquid is injected, local displacement (movement) is likely to occur.

D. Movement management of the pipe being modified is not possible.

An object of the present invention is to provide a scope construction method,
It is to eliminate the disadvantages described in the above items a to d.

[0009]

The configuration of the present invention is as follows.

A. Displacement measurement rods are inserted from the ground along the buried pipe at regular intervals, and the tip of the squat measurement rod is brought into contact with the buried pipe to measure the displacement, and the corrected stress load point is determined from the measured values Do b. Installing drain pipes at regular intervals along the buried pipeline from the ground, c. Insert a pre-tightening injection liquid injection nozzle between the discharge pipe and the discharge pipe at a position slightly above the buried pipe,
Injecting the injection liquid to form a pre-tightening layer, d. Inserting a water jet nozzle into the discharge pipe and spraying a water jet between the buried pipe and the pre-tightening layer to muddy soil; e. A guide pipe for injection is erected from the ground at the correction point, and a correction injection liquid injection rod is inserted into the guide pipe to inject the injection liquid below the buried pipe, and the buried pipe is moved by this injection pressure. Restore to original position, f. The injection pressure of the injection liquid performed in the step e is measured by measuring the floating amount of the sinking rod on the ground and controlling based on the floating amount, g. A method for correcting displacement of a buried pipe by non-cutting.

[0011]

Since the ground in the correction direction of the buried pipeline is muddy, when the correction injection liquid is injected, the buried pipeline is moved by this pressure and can be returned to the original position. Since the moving amount is determined by the injection amount of the correction injection solution, the amount is determined by detecting the floating amount of the sinking rod using, for example, a laser beam,
The displacement amount is calculated by U, and the controller automatically controls it based on the stress value.

[0012]

FIG. 1 is a schematic view of a construction site where the present invention is implemented, and FIG. 2 is an explanatory view of each point. First, when work is started, each work is laid on the ground along a buried pipeline. Mark a point. In FIG. 2, reference numeral 1 denotes a buried pipeline (hereinafter referred to as "the pipeline"), 2 ... are sinking measurement points, 3 ... are earth removal hole points, 4 ... are pre-tightening injection hole points, 5 ... are injection guide hole points. Is a mark indicating

When the work of marking each point is completed,
First, a squat measurement point is dug down to the pipe 1, a squat rod insertion pipe 6 is erected there, a squat rod 7 is inserted into the squat rod insertion pipe 6, and the amount of sink of the pipe 1 is measured. Determine the corrections.

Next, a discharging pipe 8 is erected at the discharging point 3 so as to reach the upper layer of the pipeline 1, and a pre-tightened injection liquid injection nozzle is inserted between the discharging pipe 8 and the discharging pipe. The pre-tightening layer 9 is formed by injecting the tightening infusion liquid to a position slightly above the channel 1.

Table 1 shows the composition of the pre-tightening infusion solution.

[0016]

[Table 1]

Next, a water jet nozzle 10 is inserted into the discharge pipe 8, and a water jet is injected from the nozzle 10 between the upper part of the pipe line 1 and the pre-tightening layer 9, thereby forming muddy water. This situation is shown in FIG.

Next, an injection guide pipe 11 is erected at the correction injection liquid injection point 5 so as to reach the lower part of the pipe 1, and an injection rod 12 is inserted into the injection guide pipe 11, and the rod 12 is inserted. The injection liquid for movement is press-fitted into the lower side of the pipeline 1 via the pipe 1, and the pipeline 1 is moved upward by this pressure.

The composition of the transfer liquid is shown in Table 2.

[0020]

[Table 2]

The correction amount of the pipeline 1 is as follows. The sinking rod 6 is set up on the ground, and a laser level sensor 15 is attached to the sinking rod 6.
The amount of vertical movement is calculated, the amount of displacement is calculated, and the pump is controlled from the stress value.

[0022]

The present invention has the above-described configuration and has the following effects.

A. Since the amount of displacement of the pipeline is accurately grasped in advance by using the squat measurement rod, and the correction operation is performed while grasping the movement amount with the squat rod, the correction can be performed accurately and no experience is required.

B. Since the pipe is accurately grasped, the water jet can be jetted to a position away from the pipe, and there is no fear of damaging or deteriorating the coating of the pipe by the water jet as in the related art.

C. Since the correction work is performed while observing the displacement of the squat measurement rod, when a local displacement occurs, it can be immediately recognized and appropriately dealt with.

D. Since the work is performed while observing the displacement of the squat measurement rod, there is no fear that sudden stress will be applied and excessive stress will be generated in the pipeline, causing leakage.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a correction method according to the present invention.

FIG. 2 is an explanatory diagram of each point.

FIG. 3 is an explanatory view of a situation in which muddy water is being worked by a water jet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pipeline 6 Submersion measurement rod insertion pipe 7 Subsidence measurement rod 8 Discharge pipe 9 Pre-tightening layer 10 Water jet nozzle 11 Injection guide pipe 12 Injection rod 13 Laser injector 14 CPU 15 Laser level sensor

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-168741 (JP, A) JP-A-61-204436 (JP, A) JP-A-62-156432 (JP, A) JP-A-1- 216188 (JP, A) Japanese Utility Model Showa 57-110152 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 1/024 E03B 7/00 G01B 5/30

Claims (1)

(57) [Claims] 1. A method comprising: a. Displacement measurement rods are inserted at regular intervals along the buried pipe from the ground, and the tip of the squat measurement rod is brought into contact with the buried pipe to measure the displacement, and the corrected stress load point is determined from these measured values Do b. Installing drain pipes at regular intervals along the buried pipeline from the ground; c. Insert a pre-tightening injection liquid injection nozzle between the discharge pipe and the discharge pipe at a position slightly above the buried pipe,
Injecting the injection liquid to form a pre-tightening layer, d. Inserting a water jet nozzle into the discharge pipe and spraying a water jet between the buried pipe and the pre-tightening layer to muddy soil; e. A guide pipe for injection is erected from the ground at the correction point, and a correction injection liquid injection rod is inserted into the guide pipe to inject the injection liquid below the buried pipe, and the buried pipe is moved by this injection pressure. Restore to original position, f. The injection pressure of the injection liquid performed in the step e is controlled by measuring the floating amount of the sinking rod on the ground and based on the floating amount, g. A method for correcting displacement of a buried pipe by non-cutting.