JPS59432A - Correction for deviation of buried pipe - Google Patents

Abstract

PURPOSE:To safely correct the deviation of buried pipes without affecting objects on the ground surface by a method in which the discharge of soil, the take- out of pipe, embedment, and correction are made in the inside of a sheath tube fitted on the outside of the deviated portion of the buried pipe. CONSTITUTION:In case where a buried pipe 3 leading from a starting pit 1 to an arrival pit 2 is deviated vertically by a level difference H at one place, for example, a sheath tube 4 of an inside diameter corresponding to the total sum of the outside diameter (d) of the tube 3, the level difference H, and the excess spaces S1 and S2 in the upper and lower sides is penetrated into the pit 1 by a propulsory device 5, the soil between the tubes 4 and 3 is discharged, the deviated portion of the tube 3 is completely covered with the tube 4, and the tube 3 is taken out. The tube 3 is returned into the tube 4, placed on a regulating material 13 below the tube 4, and straightly connected to the remaining tube 3. Then, a filling material 14 is packed into the space around the tube 3 to fix the tube 3. Thereby, the deviation of the tube 3 can be safely and highly accurately corrected.

Description

[Detailed description of the invention] Therein, each operation for correcting the 5 torsions of the buried pipe is sequentially performed in 11 steps.
This article relates to a method for safely repairing underground pipes without affecting anything above ground.

In recent years, the number of construction works to bury water and sewage systems, power cables, insertion pipes, gas pipes, etc. without affecting above-ground structures or the underground ground has been increasing.As a result, various construction methods have been developed. Propulsion method. Small-diameter propulsion method for machine $1. Semi-shield construction method, W4 pipe cutting method, etc. are often used, but in both construction methods
In this case, buried pipes may undulate up and down or from side to side. Since the tolerance range for the 5-curvature of the pipeline is approximately □, very high accuracy is required, so if the buried pipeline has 5-curvatures that exceed the above-mentioned tolerance range, it will be unusable, so this must be corrected. However, the current method for correcting this problem is to inject chemicals into the soil that covers the undulating parts of the buried pipe, harden the ground, and then have workers dig into the buried pipe and break it. Or, remove the buried pipe by fusing it, push a new pipe from the end of the pipe, and move another pipe to the removed part to correct the alignment, or cut the top of the buried pipe. The method was to take out the pipes, put them back in, correct the alignment, and then fill them back in again.In the former case, the correction could be made without affecting anything above ground, but it was hardened by pouring chemicals. There is a high risk of the ground collapsing during construction and causing an accident involving human life, and in the latter case, construction cannot be carried out if excavation under rivers, railways, buildings, etc. is not allowed. Due to the current situation, there has been a strong desire in the industry for the completion of a method that can perform 5-curvature correction of buried pipes while ensuring safety in the ground, without requiring excavation that would affect above-ground objects.

The method for correcting the 5-curvature of a buried pipe, which is related to the present invention, was made to satisfy the above-mentioned requirements, and involves enclosing a buried pipe with a undulation in a sheath pipe, removing earth from the pipe within the sheath pipe, and The purpose of the present invention is to provide a method for safely repairing buried pipes without affecting above-ground objects by taking out the pipe, returning and repairing the pipe, and filling the void.

In other words, this method can be used to connect underground pipes up and down or left and right.
When a bend occurs and it needs to be corrected, a sheath pipe large enough to accommodate the undulation is pushed into the outside of the buried pipe from one end of the pipe, and C. The buried pipes are discharged to the outside of the pipe line, and the buried pipes enclosed in the sheath pipe P are taken out one after another from the end until they reach the end of the undulating part. Position each buried pipe so that it touches straight and connect it to the remaining buried pipe one by one.Fill the gap between the repaired buried pipe and the sheath pipe with a gap filler to fix the buried pipe. Since the modification is completed, all work can be done in a safe condition with the sheath pipe preventing the ground from collapsing, so the safety of highly dangerous underground work is completely guaranteed. Since this method does not affect the ground surface in any way due to the ground protection by the sheath pipe, it is possible to carry out corrections under rivers, railways, and structures.

Furthermore, in this method, since there is a sheath pipe outside the buried pipe,
If you remove soil from inside, the wall of the sheath pipe will serve as a guide.
Not only is it easy to return the buried pipe and connect it straight to the remaining pipe and the repaired pipe using the adjustment member, but after the construction is completed, the buried pipe is double coated with the sheath pipe and the gap filling material, making it easy to repair the pipe. This has the unique effect of being reinforced so that there is no risk of it undulating or collapsing again due to earthquakes, etc.

Next, a method related to the present invention will be explained in detail with reference to the drawings.

As shown in Figure 1 of the drawing, a buried pipe 3 is buried from the starting chill 1 to the arrival hole 2. The pipe 3 has an undulating portion as shown in the drawing (this undulation is not a simple one in one direction as shown in the figure, but often has several undulations in different directions, but for convenience, it is shown in a simple manner) If the amount of waviness (in other words, the height difference I of the buried pipe 3) is recognized, the outside diameter d of the buried pipe 3 is calculated by adding the above-mentioned height difference H and the surplus space S above and below. .

A sheath tube 4 as shown in FIG. When the propulsion device 5 is used to press fit the soil, the soil that enters between the sheath pipe 4 and the buried pipe 3 is removed through the opening of the shielding plate 61 attached to the sheath pipe 4 as shown in Figure 4 of the drawings. Either a water jet is injected from the spray nozzle 7 to break it up, and the shielding plate 6 is sucked through a suction pipe 8 opened in the shielding plate 6 and discharged to the outside. The water injection pipe 9 and the drain pipe 1O are opened, and the auger 11 is penetrated to inject water from the water injection pipe 9, and the soil is excavated by the auger 11 as shown in Figure g of the drawings, and the soil is removed from the auger cover tube 12t. If the wastewater is discharged to the outside through the drain pipe 10, the buried pipe 3 supported by the soil becomes free, so the free buried pipe 3 is brought out from one end to the starting chiller 1, and the drain is discharged to the outside through the drain pipe 10. Length of sheath tube 4
Once the terminal name is press-fitted, the sheath pipe 4 is added and press-fitted further, and the soil that has entered the sheath pipe 4 is discharged to the outside, and the embedded pipe 3 that has come loose due to this is completely removed from the start. 1, and when the tip of the sheath pipe 4 passes the end of the meandering part, stop the press-fitting, remove the earth, and pull out the free buried pipe 3. As shown in Fig. e, all the parts before the end of the undulating part are taken out and the inside of the sheath tube 4 is made hollow.In this state, the embedded tube 3 taken out to the starting shaft 1 is inserted into the sheath tube 4. Place the adjustment member 13 such as the lower part of the sheath tube 4, place the embedded tube 3 on top of it, and align it so that it comes into direct contact with the remaining embedded tube. After adjusting, the gap 1 between the circumference and the sheath tube 4 is filled with a gap filling material 14 such as cement, and the embedded tube 3 is fixed, and the next embedded tube is inserted into this fixed embedded tube 3. 3 so that they are in direct contact with each other using the adjusting member 13, and fill the gap between the embedded tube 3 and the sheath tube 4 with the gap filling material 14 from the inner end of the sheath tube 4 to the inlet end. For example, if the embedded pipe 3 shown in Figure S of the drawing is buried straight inside the sheath pipe 4, it is possible to create a management system that meets the strict conditions of water supply and sewerage systems by keeping the difference in height between the ridges within 50 degrees. However, since this method performs the above-mentioned work inside the sheath pipe 4 while preventing the soil from collapsing, the work P
There is no danger at all, and since the buried pipe 3 is double coated with the sheath pipe 4 and the gap filling material, there is no risk of bending after correction.

Next, an example of a method related to non-invention will be described.

Example: Diversion pipes with a diameter of go in order of go and a total length of gOm are buried under a road, and when the pipe is surveyed after the burying is completed, there is an upward slope relative to the horizon within a range of 20 to 30 m from one end of the pipe. 7gO
An undulating part of ma was observed. Therefore, the outside diameter of this buried pipe is /3! Omm, a steel sheath pipe with a wall thickness of 2 mm is inserted into the pipe from one end, and the buried pipe is enclosed, and the soil that has entered the space between the sheath pipe and the buried pipe is expelled to the outside, and the soil is released along with it. Take out the buried pipes one by one, and when the name of the buried pipe in the undulating part is sung, pour cement as an adjustment member into the lower part of the hollow sheath pipe, place the buried pipe on top of it, and Adjust the alignment so that it is in direct contact with the remaining buried tube, fill the space between this buried tube and the sheath tube with cement as a gap filler, fix the buried tube, and perform the same operation as above. The operation of connecting the next implanted tube straight to the implanted tube was performed t times in sequence.

As a result, we were able to safely complete the repair work on the buried pipe, where the difference in height at the undulating part was within 1,000 hours, without any impact on above-ground structures, in about 90 hours.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a buried pipe that is curved upward and downward. FIG. 2 is a longitudinal sectional front view showing the relationship between the sheath tube and the implanted tube used in the method related to the present invention. 3 to 5 are longitudinal sectional side views showing the construction order of the method according to the present invention. FIG. 4 is a partially cutaway longitudinal side view when soil in the sheath pipe is discharged using a water jet and a suction pipe. Figure 7 is a front view of the same as above. Fig. g is a partially cutaway longitudinal side view when soil in the sheath pipe is discharged with an auger. The second figure is a front view of the same as above. In the figure, 3 is a buried pipe, 4 is a sheath pipe, 13 is an adjustment member, and 14 is a gap filler. 7 Figure No. Procedural Amendment (Self-restraint Showa S-F] July/71) 1. Indication of the case 1982 Patent Application No. 10ggg 3 2. Name of the invention Method for correcting undulations in buried pipes 3. Making amendments Relationship with the patent case Patent application People’s name Representative Tatsu Ikeya
Male 4, Agent Column 1 “Detailed explanation of the invention” in the specification / 7th line from the bottom of page 9 in the specification pkoI-g Omm
Correct "l" to "r g 00 mm-1". / Same as above, page 10, bottom, 1st line, 1-about. Hours - 1 and 1 - about 90 hours, ? J Correct.

Claims (1)

[Claims] Outside the undulations that have occurred in the buried pipe, a sheath pipe that can accommodate the undulations is fitted, and inside the sheath pipe, earth is removed, the buried pipe is taken out, the buried pipe is returned, alignment is corrected, and gaps are formed. A method for correcting waviness in a buried pipe, characterized by sequentially filling the pipe.