JP2004150256A - Hole drilling device for sewer installation pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hole drilling device for a sewer installation pipe for boring a feeding-in hole in a sewer installation pipe wall surface for feeding a filler into an underground cavity from the sewer installation pipe. <P>SOLUTION: This hole drilling device for the sewer installation pipe is constituted so as to project or remove a rotary cutting blade installed on the tip of a rotary shaft from an opening of a cylindrical body by arranging a pipe wall hole drilling machine having the almost vertical rotary shaft to a shaft of the cylindrical body in the cylindrical body having a diameter introducible into the sewer installation pipe and having longitudinal both end parts of a spindle shape so that the rotary shaft can advance and retreat in the radial direction of the cylindrical body, and oppositely arranging a set of jack devices for energizing the pipe wall hole drilling machine in the advancing direction and the retreating direction on the back side and the belly side of the pipe wall hole drilling machine, and is characterized by having a pair of annular air packers for fixing the cylindrical body in the sewer installation pipe in the longitudinal both end parts. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sewage mounting pipe drilling device, and particularly to a sewage mounting pipe when an underground cavity generated by the outflow of earth and sand from a defective portion of the sewage pipe or the like is located near the sewage mounting pipe. TECHNICAL FIELD The present invention relates to a sewage pipe drilling device used to efficiently fill an underground cavity by utilizing a method.
[0002]
[Prior art]
Various pipelines for water supply, sewerage, city gas, electric power, telecommunications, etc. are often buried in the ground under the road, and in particular, when damage occurs to the pipelines of In addition to leaking from the damaged part, soil and soil in the ground may be washed away, and a cavity may be formed in the ground. Leaving such cavities not only increases the scale and leads to the collapse of the road surface, but also hinders traffic and may cause damage to various structures and the like.
[0003]
Therefore, when an abnormality is found on the road surface, it is first suspected that an underground cavity will be generated, and the pavement surface will be removed, and the underground structure will be investigated. It was common practice to rebuild the building by filling it with earth and sand and re-paving it. However, the method of excavating from the ground in this way requires a large amount of sediment to be transported and then backfilled, which requires a long construction time, increases costs, hinders traffic, and reduces the environmental impact of noise and dust. There is also the problem of pollution.
[0004]
Therefore, in order to avoid occurrence of the above-described problem, the present inventor drilled a small-diameter hole instead of excavating earth and sand from the ground, and directly injected earth and sand from the ground into a hollow portion underground through this hole. A method for filling and stabilizing was invented and patented (JP 2733755, JP 3037929). However, even with such a construction method, when various pipes, structures, and the like are installed in the ground in a complicated manner, it may not be easy to construct the small-diameter hole, and thus the disadvantage of the above-described construction method may be difficult. As a new construction method capable of avoiding the problem, a method (Japanese Patent Application No. 2001-257877) of filling a cavity by using a buried pipe or the like having a defect that caused an underground cavity has been proposed. However, even with this new construction method, temporary construction work may be required during the repair work, such as partial suspension of use of buried pipes or a change in the flow path, and there are limits to the reduction of traffic obstacles and environmental pollution. Was.
[0005]
By the way, according to a recent survey on the above-mentioned underground cavities, more than two-thirds of the causes are caused by defects generated in the sewage attachment pipe connected to the sewage main pipe, the sewage main pipe and the attachment pipe. It was found that the defect generated at the branch portion of the occupied portion occupied. Therefore, it can be said that two-thirds or more of the generated underground cavity exists at a position close to the sewage attachment pipe.
[0006]
As described above, if the generated underground cavity is located near the sewage fitting pipe, if the filling work of the underground cavity can be carried out via the sewage fitting pipe, work such as stopping use of the sewage main pipe or changing the flow path It is thought that the impact on the environment and the labor and time required for the work can be significantly reduced. Therefore, similar to the invention technology of the prior application, an underground using a sewage installation pipe can greatly reduce the effect on the environment without damaging underground structures and the like and almost without impairing the function of the sewage main pipe. A cavity filling method has been proposed and a patent application has been filed (Japanese Patent Application No. 2002-200272).
[0007]
By the way, the sewage attachment pipe that connects the upper basin installed on the ground surface and the sewage main pipe under the ground is generally composed of a thin ceramic pipe with a diameter of about 15 cm in general, and is buried underground. In order to avoid water pipes, conduits, and the like, they are often embedded so as to have a steep slope, including bent portions such as 30 °, 60 °, and 90 °. For this reason, it has conventionally been considered impossible to perform repair or other work on such a buried sewage installation pipe without removing the surrounding earth and sand.
[0008]
[Problems to be solved by the invention]
Therefore, the present invention aims to provide an apparatus suitable for efficiently carrying out a method for filling an underground cavity located in a position close to a sewage attachment pipe as described above. To provide a new sewage fitting pipe drilling device for introducing a filler hole into a sewage fitting pipe and introducing a filler from the sewage fitting pipe into an underground cavity in a wall surface of the sewage fitting pipe. What you are trying to do.
[0009]
[Means for Solving the Problems]
The drilling device for a sewage fitting pipe according to the present invention includes a spindle having a diameter that can be introduced into the sewage fitting pipe and having both front and rear ends in a spindle shape, and a rotation axis substantially perpendicular to the axis of the cylinder. A pipe wall drilling machine is provided so that the rotation axis can advance and retreat in the radial direction of the cylindrical body, and the pipe wall drilling machine is provided on the back side and the abdominal side of the tube wall drilling machine in a forward direction and a retreating direction. By providing a set of jack devices opposing to each other, the cylindrical cutting blade attached to the tip of the rotating shaft can be protruded from the opening of the cylindrical body and can be withdrawn, and At both ends, there is provided a pair of annular air packers for fixing the tubular body in the sewage attachment pipe.
[0010]
The jack device used in the sewage pipe drilling device of the present invention is not particularly limited, but a fluid pressure driven jack device such as a pneumatic jack or a hydraulic jack, or a mechanical jack driven by an electric motor. Can also be used. Above all, a fluid pressure jack such as a pneumatic jack can be preferably used.
[0011]
Further, in the drilling device for a sewage mounting pipe of the present invention, at least one of the front and rear ends, at least one of the front and rear ends, is provided with a moving tow line for extending into the sewage mounting pipe or withdrawing from the sewage mounting pipe. It is easy to introduce and take out the drilling device for the mounting pipe into the sewage mounting pipe, and it is possible to obtain an effect that the drilling apparatus can be fixed at an accurate position even in a sewage mounting pipe having many bends.
[0012]
The pipe wall drilling machine used in the drilling device for a sewage mounting pipe of the present invention may be one that rotates the rotary cutting blade by a power drive or a pressure fluid drive motor, and is usually used. In addition to electric motors, turbines powered by pressurized water, compressed air, etc., can be selected and used as appropriate according to the work site environment, and work safety and work environment protection can be achieved. There are advantages that can be easily harmonized.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a sewage mounting pipe drilling device of the present invention will be described with reference to FIGS. In the figure, A is a sewage attachment pipe existing in the vicinity of the underground cavity, and B is an opening of an inflow passage for soil and the like for filling the underground cavity provided in the sewage attachment pipe A. Generally, an opening B suitable for the above-mentioned purpose is not provided in the sewage mounting pipe A, and therefore, an underground cavity to which the cavity filling method is to be applied and a sewage installation existing in the vicinity thereof. After thoroughly examining the situation with the pipe A, first the position of the opening B suitable for feeding the filler into the underground cavity is selected, and then the sewage pipe drilling device of the present invention is installed in the sewage pipe A. It is necessary to introduce C and perforate the opening B in the pipe wall of the sewer attachment pipe A.
[0014]
In the sewage mounting pipe drilling device C shown in the figure, reference numeral 1 denotes a cylindrical body having a size capable of being introduced into the sewage mounting pipe A, and its front side 1a and rear side 1b are bent and embedded. It is thinned to a spindle shape so that it can be easily introduced into A. Tow lines 2a, 2b can be connected to the front end of the front side portion 1a and the rear end of the rear side portion 1b, respectively. A sewage mounting pipe drilling device C can be drawn into or pulled out of A.
[0015]
Outside the front part 1a and the rear part 1b, annular air packers 3a and 3b are provided, respectively, and the internal spaces of these annular air packers 3a and 3b communicate with the pressurized air pipe 3c, respectively. are doing. Although these annular air packers 3a and 3b are normally in a contracted state, they are expanded by air sent from the ground through the pressurized air pipe 3c, and the inner wall surface of the sewage attachment pipe A and the sewage attachment pipe drilling device C are removed. It is configured such that the gap with the outer surface is sealed and the sewage mounting pipe drilling device C can be fixed in the sewage mounting pipe A.
[0016]
A tube wall drill 4 having a rotating shaft 4a extending in a direction perpendicular to the axis of the cylindrical body 1 is provided in a central portion 1c of the cylindrical body 1 in a direction opposite to the direction in which the rotating shaft 4a protrudes. It is housed between the pneumatic jack 5 provided on the side and the pneumatic jack 6 also provided on the ventral side so as to be able to advance and retreat in the direction of the rotating shaft 4a. Further, a rotary cutting blade 4b of, for example, a cylindrical shape is attached to the tip of the rotary shaft 4a, and the rotary cutting blade 4b extends outward from a cutting window 1d formed on the wall surface of the central portion 1c. Are configured to be able to appear.
[0017]
The pneumatic jack 5 and the pneumatic jack 6 have their internal spaces communicating with the compressed air conduit 5a and the compressed air conduit 6a, respectively, and are expanded by the compressed air supplied from these compressed air conduits 5a and 6a. Thus, the pipe wall drill 4 is supported from the back side and the abdomen side. Also, by expanding one of the pneumatic jack 5 and the pneumatic jack 6 and simultaneously contracting the other, the tube wall drilling machine 4 is urged in the abdominal direction or the dorsal direction, so that the rotating shaft 4 a It can be advanced or retracted along the direction.
[0018]
Therefore, when the rotary cutting blade 4b attached to the rotary shaft 4a is rotated when the pneumatic jack 5 on the back side of the pipe wall drill 4 is expanded, the rotary cutting blade 4b moves forward to cut the cutting window. An opening B can be formed by projecting from 1d and drilling the inner wall surface of the sewer attachment pipe A. Next, when the pneumatic jack 6 on the ventral side of the pipe wall drill 4 is expanded and the pneumatic jack 5 is contracted, the rotary cutting blade 4b attached to the rotary shaft 4a is retracted, and when the opening B is formed, The cut-out cylindrical portion of the inner wall surface of the sewage mounting pipe A can be pulled out while being taken into the rotary cutting blade 4b, and collected in the cylindrical body 1.
[0019]
When filling the underground cavity using such a drilling device C for sewage installation pipes of the present invention, the positional relationship between the underground cavity to be constructed and the buried pipes such as sewage pipes is sufficiently investigated, and sewage installation is performed. The advantages of using pipes to fill underground cavities will be confirmed first, and then the feasibility of providing an opening for introducing filler in the sewerage pipe will be examined. From these examination results, after it is determined that it is appropriate to use the sewage mounting pipe drilling device C of the present invention, the sewage mounting pipe drilling device C having a size adapted to the diameter of the local sewage mounting pipe is selected. It is preferable to undertake filling work for the underground cavity.
[0020]
In order to start the filling work of the underground cavity, first, it is necessary to determine the position where the opening B in the sewage mounting pipe A is provided based on the above-mentioned investigation in order to feed the filler into the underground cavity. After determining the drilling position of the sewage fitting pipe, necessary preparations such as surveying are performed in order to accurately fix the drilling device C for sewage fitting pipe at the drilling position of the sewage fitting pipe. If necessary, the towing line 2a or the like is inserted through the sewage mounting pipe, and the sewage mounting pipe drilling device C is introduced into the predetermined position of the sewage mounting pipe A from the upper chamber, and the annular air packer 3a is inserted. And 3b are inflated to fix the sewage mounting pipe drilling device C in the correct drilling position.
[0021]
In this way, the rotary cutting blade 4b of the pipe wall drill 4 is rotated, and the pneumatic jack 5 is expanded, so that the opening B is formed in the wall of the sewage attachment pipe A by the rotary cutting blade 4b. After that, the pneumatic jack 6 is expanded to withdraw the rotary cutting blade 4b, and then the annular air packers 3a and 3b are contracted. And collect.
[0022]
Further, the condition of the opening B is inspected to confirm whether or not the feeding of the filler is obstructed. If necessary, additional excavation of the feeding hole for the filler is performed. The filling material is injected into the underground cavity according to the underground cavity filling method proposed in 2002272. After the filling of the underground cavity is completed, the opening B of the sewage mounting pipe A is filled and sealed, and the inner surface of the sewage mounting pipe A including the opening B portion is repaired, and a new lining is applied as necessary. In this way, underground cavity filling work using sewage attachment pipes is completed.
[0023]
【The invention's effect】
According to the underground cavity filling method using the drilling device for sewage mounting pipe of the present invention, the construction can be efficiently advanced by using the sewage mounting pipe having a relatively small diameter and remarkable bending, so that the number of steps can be reduced. In addition to shortening the construction period, the number of operations on the ground or near the ground surface increases, so that not only the working device is reduced in size, but also the amount of work involved in handling is expected to be significantly reduced.
Moreover, there is little damage to the road surface, there is almost no risk of environmental pollution due to the construction, and the construction cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view illustrating the structure of a drilling device for a sewage installation pipe according to the present invention.
FIG. 2 is a longitudinal sectional view taken along line XX of the drilling device for sewage mounting pipe of the present invention.
FIG. 3 is a front view of the sewage mounting pipe drilling device of the present invention installed in the sewage mounting pipe.
[Explanation of symbols]
Reference Signs List A Sewage attachment pipe B Opening C Sewage attachment pipe drilling device 1 Cylindrical body 1a Front side 1b Rear side 1c Central part 1d Cutting window 2a, 2b Tow rope 3a, 3b Annular air packer 3c Pressurized air pipe 4 Pipe wall drilling machine 4a Rotary shaft 4b Rotary cutting blade 5 Pneumatic jack 5a Compressed air conduit 6 Pneumatic jack 6a Compressed air conduit

Claims (4)

A pipe wall drilling machine having a diameter that can be introduced into the sewage mounting pipe and having both front and rear ends in a spindle shape, a pipe wall drilling machine having a rotation axis substantially perpendicular to the axis of the cylinder, A set of jack devices that urge the tube wall drilling machine in the forward and backward directions are provided on the back side and the ventral side of the tube wall drilling machine so as to be able to advance and retreat in the radial direction of the cylindrical body. The rotary cutting blade attached to the tip of the rotary shaft can be protruded from the opening of the cylindrical body and can be withdrawn, and the front and rear ends are provided with the cylindrical body in a sewer attachment pipe. A drilling device for sewage mounting pipes, comprising a pair of annular air packers to be fixed to the pipe. The sewage pipe drilling device according to claim 1, wherein the jack device is a pneumatic jack. The drilling device for a sewage attachment pipe according to claim 1, wherein a moving tow line for introducing into or withdrawing from the sewage attachment pipe is provided on at least one of the front and rear ends. The drilling device for sewage attachment pipes according to claim 1, wherein the pipe wall drilling machine rotates the rotary cutting blade by an electric power drive or a pressure fluid drive motor.

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