JP2016108916A - Guiding device and guiding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guiding device and a guiding method of a boring rod for efficiently and surely extracting-removing an existing buried pipe buried underground.SOLUTION: The present invention is a guiding device constituted of a guide device composed of a slide plate processed with a predetermined width along an outer wall shape of an existing buried object and an annular support ring fixed to an upper part of the slide plate by rotatably fitting to one place of a central part or uniformly to a plurality of places in an upper part of the slide plate so as to cover an outer peripheral part of the boring rod and a guide device support groove provided with a gradation by diametrically reducing so that the support ring of the guide device is fitted in the outer peripheral part of the boring rod.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a guiding device and a guiding method for a boring rod for efficiently and surely drilling a boring rod along an outer wall of an existing buried object such as a water and sewage system or an electric / telecom pipe buried in the ground. It is about.

  There is an increasing demand for removing existing buried pipes that have been buried in the ground and have deteriorated, and bury new pipe materials. In urban areas, it is difficult to bury new pipes in different places due to the congestion of underground buried objects, so they are often planned at the same location as existing buried objects. In urban areas, it is difficult to remove existing pipes and bury new pipes using the open-cut method. For this reason, as a technique for removing existing buried pipes etc. without using the open-cut method, a plurality of rotary crushing blades are placed on the entire excavation section of the excavator, and the existing buried pipe is crushed and newly installed behind it. An existing excavation machine for pipes has been developed to bury pipes. However, in the above-described conventional remodeling machine, if the existing buried pipe is a reinforced concrete pipe (A-type pipe, B-type pipe) buried by the open-cut method, the main body concrete and the reinforced steel are not shredded. It can be easily done and can be replaced reliably. However, when the existing buried pipe is a reinforcing steel concrete pipe for the propulsion method, the steel collar of the joint cannot be broken finely. There was a problem that removal would be difficult.

  For this reason, Japanese Patent Application Laid-Open No. 10-54482 is disclosed as a technique for pulling out an existing buried pipe without crushing the existing buried pipe and drawing the new installed pipe at the same time as the removal. The configuration is that the required extraction device 7 is installed in the first work pit A for the buried pipe 1 laid between the first work pit A and the second work pit B. One end of the tube 1 is clamped by the drawing device 7, and the replacement PE tube 4 is connected to the other end of the buried tube 1 exposed in the second work pit B through the connecting means 3. And it is provided with the filler supply means 8A which introduces fillers, such as mortar containing a lubricating material, into the pipe | tube of the burial pipe 1 through the end of the burial pipe 1, and the opening which makes this filler flow out from the other end of the burial pipe 1 Prepare. In the process of pulling out the buried pipe 1 by the drawing device 7, it is buried while injecting a filler between the outer circumference of the replacement PE pipe 4 connected by the connecting means 3 and the inner wall of the hollow portion generated in the drawing path of the buried pipe 1. This is a buried pipe exchanging method in which the pulling operation of the pipe 1 and the pulling operation of the PE pipe 4 are performed simultaneously.

  According to the conventional buried pipe replacement method, the existing buried pipe can be drawn without being crushed, and the PE pipe 4 can be simultaneously drawn into the drawn path, thereby facilitating the reconstruction.

  With this technology, it is easy to pull out the existing buried pipe and the PE pipe from the small-diameter pipe, but as the existing buried pipe diameter increases, the contact area between the surrounding natural ground and the outer circumference of the existing buried pipe increases. The resistance is great. In particular, the outer peripheral surface of the existing buried pipe, which has been buried in the ground for many years, is tightened by the surrounding natural ground, and a large force is required for the drawing force for pulling out the existing buried pipe, and the drawing device becomes large-scale. There is a problem that the existing buried pipe material is damaged by a large pulling force.

For this reason, in order to reduce the large pulling force for pulling out the existing buried pipe, a plurality of boring rods are horizontally drilled along the outer peripheral surface of the existing buried pipe, and the lubricant, etc. However, in the case of horizontal drilling, the boring rod tends to be deflected depending on the surrounding soil conditions, and the longer the drilling extension, the greater the effect. There was a problem that the ring lot could not be punched and pulled out.
JP-A-10-54482

  For this reason, the problem to be solved by the present invention is to provide a boring rod guiding device and guiding method for efficiently and surely pulling out and removing existing buried pipes and the like.

The present invention is a guide device for drilling a boring rod along the outer wall of an existing buried object buried in the ground,
A slide plate processed with a predetermined width so as to follow the shape of the outer wall of the existing embedded object, and an outer peripheral portion of the boring rod at one or a plurality of equal portions in the central portion at the upper portion of the slide plate. A guide device comprising an annular support ring that is rotatably fitted so as to cover and is fixed to the upper portion of the slide plate, and the support ring of the guide device is fitted into the outer periphery of the boring rod. It is a guidance device constituted by a guide device support groove having a reduced diameter and a stepped portion.
The slide plate of the guide device is a guide device configured in a substantially triangular shape with a sharp tip.
Guide device support grooves provided on the outer periphery of the boring rod are provided at predetermined intervals in the insertion direction, and each guide device support groove is a guide device in which a support ring of the guide device is fitted.
A guiding method for drilling a boring rod along the outer wall of an existing buried object buried in the ground,
A slide plate processed with a predetermined width so as to conform to the outer wall shape of the existing embedded object, and an upper portion of the slide plate covers the outer periphery of the boring rod at one or a plurality of locations in the central portion. A guide device comprising an annular support ring that is rotatably fitted and fixed in such a manner, and a diameter-reduced paragraph is provided on the outer periphery of the boring rod so that the support ring of the guide device is fitted. The boring rod is guided along the outer wall of the existing buried object while transmitting the rotation to the boring rod by the driving device using the guiding device for the boring rod constituted by the guide device supporting groove. This is a guiding method for drilling inside.

  The slide plate is processed along the outer wall shape of the existing embedded object. If the embedded object has a circular cross section, the slide plate is processed into a curved shape according to the outer diameter. If the rectangular cross section, the slide plate is processed in a horizontal shape. The width of the slide plate needs to be subjected to the earth pressure reaction force applied to the outer wall surface of the existing buried object with a predetermined width and depth in order to suppress deflection deflection of the rod when drilling the boring rod. When the boring rods are installed at a plurality of locations, the boring rod width is determined in a state where the boring machine main body can be disposed adjacently.

  The outer diameter of the protective tube is annular so that the boring rod can rotate, and is manufactured to have the same diameter as the outer diameter of the boring rod so as not to hinder the drilling. The support ring is configured to be fixed to the upper portion of the slide plate and serves as a guide device. The depth of the support ring is made in accordance with the depth of the slide plate.

  An annular support ring of the guide device is fitted on the outer periphery of the boring rod at a predetermined interval in the drilling direction, so that the guide device support groove is substantially the same as the outer diameter of the boring rod. Is provided. The depth of the step is slightly longer than the depth of the guide device, and the annular support ring is completely fitted in the guide device support groove. The installation position of the guide device support groove is for preventing the boring rods from being lifted, and a method of installing one location for every several rods is usually employed.

  It is effective to make the tip of the slide plate of the guide device into a triangular cross-section with a sharp tip so that the thickness of the slide plate does not interfere with penetration resistance when drilling the boring rod. In addition, injection holes are provided in the wall surface of each slide plate, the injection holes are connected by a connecting pipe, the injection hole of the slide plate at the tip branches, and a plurality of injection holes are formed at the tip. The penetration resistance and the frictional resistance can be reduced by installing and injecting the lubricant or the like to the outer periphery of the existing embedded portion in combination with the drilling.

  The material of the guide device is to suppress a large deflection force applied to the boring rod during drilling and is made of a steel material having a relatively high strength.

  The rod for boring may be processed with the guide device support groove at a predetermined position by using a commonly used rod, or a rod equipped with a guide device support groove can be newly produced. It is.

  Since the slide plate is pressed against the outer peripheral surface of the existing buried pipe by the earth pressure applied to the slide plate constituting the guide device, the guide device and the guide method of the present invention are fixed to the protective ring of the guide device. The existing boring rod is surely perforated along the existing buried pipe 1 without being deflected. For this reason, the lubricant is reliably filled into the outer peripheral surface of the existing buried pipe from the tips of the plurality of boring rods, and the existing buried pipe can be pulled out with a low frictional resistance.

  Induction apparatus and method for perforating a boring rod along the outer wall of an existing buried object buried in the ground, and a guiding apparatus capable of efficiently and accurately constructing a plurality of boring rods And the guidance method was realized.

  FIG. 1 is a cross-sectional view illustrating a method for guiding a boring rod by the guide device of the present invention. On a predetermined outer peripheral portion of a circular existing buried pipe 1 that is an existing buried object, a slide plate 4 processed in an arc shape with a predetermined width along the outer wall shape of the existing buried pipe 1, and an upper portion of the slide plate 4 A guide device 2 including a cylindrical support ring 3 that is rotatably fitted and fixed so as to cover the outer periphery of the boring rod 5 is installed at the center. The slide plate 4 and the support ring 3 are manufactured so as to give a predetermined peripheral earth pressure P on the slide plate 4 with a predetermined depth in order to suppress the deflection of the boring rod 5 during drilling. . The outer diameter of the protective ring 3 is annular so that the boring rod 5 can rotate, and is made substantially the same diameter as the outer diameter of the boring rod 5 so as not to interfere with drilling.

In the present embodiment, the support ring 3 fixed to the upper part of the guide device 2 is disclosed at one central point. However, it is determined that the lubricant or grout material is difficult to turn around the outer peripheral surface of the pipe depending on the soil condition and the pipe diameter. In such a case, it is possible to arrange them evenly at a plurality of locations. At this time, the interval between the boring rods 5 is determined as the arrangement of the boring rods 5 at an interval at which boring machine bodies (not shown) can be arranged adjacent to each other.

  In this embodiment, the existing embedded object is disclosed as a circular existing embedded pipe 1. However, when the existing embedded object is an existing box having a rectangular cross section, the slide plate 4 of the guide device 2 is manufactured in a straight line with a predetermined width. Is done.

    FIG. 2 is a longitudinal sectional view for explaining a method of guiding a boring rod by the guide device of the present invention. The slide plate 4 of the guide device 2 is in contact with the top of the existing buried pipe 1 so as to cover the outer peripheral surface of the existing buried pipe 1, and the annular support ring 3 fixed to the upper part holds and holds the boring rod 5 doing. A guide device support groove 6 that is reduced in diameter so that the outer diameter of the support ring 3 and the outer diameter of the boring rod 5 are substantially the same diameter is provided on the outer peripheral surface of the boring rod 5 at the position of the support ring 3. It has been. The width of the guide device support groove 6 is slightly wider than the width of the support ring 3 so that the support ring 3 is fitted. As the boring rod 5, the guide device support groove 6 may be processed at a predetermined position by using a commonly used rod, or the boring rod newly provided with the guide device support groove 6. 5 can also be manufactured.

  FIG. 3 is a longitudinal sectional view for explaining in detail the support ring of the guide device of the present invention. A guide device support groove 6 having a diameter slightly larger than the width of the support ring 3 is provided at a predetermined position on the outer peripheral surface of the boring rod 5. The depth of the guide device support groove 6 is substantially the same as the thickness of the support ring 3 and is cut out at a height. The outer diameter of the support ring 3 and the outer diameter of the boring rod 5 are substantially the same. It is made to become.

  The tip of the slide plate 4 of the guide device 2 can be made in a triangular cross section with a sharp tip so that the thickness of the slide plate does not interfere with penetration resistance when the boring rod 5 is drilled. . In addition, injection holes are provided through the wall surface of each slide plate 4, the injection holes are connected by a connecting pipe or the like, and the injection hole of the slide plate 4 at the front end is branched to have a plurality of locations at the front end. The penetration resistance and the frictional resistance can be reduced by installing an injection hole (not shown) and injecting a lubricant or the like to the outer periphery of the existing embedded portion in combination with the perforation.

  FIG. 4 is a cross-sectional view showing a construction state of a boring rod drilled by the guiding device of the present invention. The boring rod 5 installed on the outer peripheral surface of the existing buried pipe 1 is pressed against the surrounding earth pressure P by the slide plate 4 of the guide device 2 arranged at a predetermined interval in the drilling direction. Therefore, it is drilled in a straight line without leaving or deflecting from the existing buried pipe 1. In the present embodiment, the drilling of the boring rod 5 is disclosed at 8 locations, but the number of drilled holes can be increased or decreased depending on the soil condition, the diameter of the existing buried pipe, and the like.

  When the drilling of the boring rod 5 is completed in order to pull out and remove the existing buried pipe 1, the boring machine body rotates the boring rod 5 and injects the lubricant from the boring rod 5, The boring rod 5 is pulled out along the outer periphery of the existing buried pipe 1. When the extraction of all the drilled boring rods 5 is completed, the entire outer peripheral surface of the existing buried pipe 1 is uniformly filled with the lubricant, and the friction resistance force between the surrounding ground and the outer circumference of the existing buried pipe 1 is It is significantly reduced and the existing buried pipe can be pulled out easily. As another example, when there is a gap or the like on the outer peripheral surface of the existing embedded pipe 1 or the like that is an existing embedded object, a plurality of boring rods 5 are similarly perforated and replaced with a lubricant. By filling the grout, it is possible to reliably fill the gap and prevent the surrounding ground from sinking.

    As described above, the slide plate 4 is pressed against the outer peripheral surface of the existing buried pipe 1 by the peripheral earth pressure P applied to the slide plate 4 constituting the guide device 2 by the guide device and the guide method of the present invention. The boring rod 5 fixed to the protective ring 3 of the guide device 2 is also surely perforated along the outer wall surface of the existing buried pipe 1 without being deflected. For this reason, the lubricant is reliably filled into the outer peripheral surface of the existing buried pipe 1 from the tips of the plurality of boring rods 5, and the existing buried pipe 1 can be pulled out with a low frictional resistance.

It is a cross-sectional view explaining the guide method of the boring rod by the guide device of the present invention. It is a cross-sectional view explaining the guide method of the boring rod by the guide device of the present invention. It is a longitudinal cross-sectional view explaining the support ring of the guide apparatus of this invention in detail. It is a cross-sectional view which shows the construction condition of the rod for boring pierced by the guidance apparatus of this invention.

DESCRIPTION OF SYMBOLS 1 Existing underground pipe 2 Guide apparatus 3 Support ring 4 Slide plate 5 Boring rod 6 Guide apparatus support groove 7 Rear part of joint part P Peripheral earth pressure

Claims (4)

A guiding device for drilling a boring rod along the outer wall of an existing buried object buried in the ground,
A slide plate processed with a predetermined width so as to follow the shape of the outer wall of the existing embedded object, and an outer peripheral portion of the boring rod at one or a plurality of equal portions in the central portion at the upper portion of the slide plate. A guide device comprising an annular support ring that is rotatably fitted so as to cover and is fixed to the upper portion of the slide plate, and the support ring of the guide device is fitted into the outer periphery of the boring rod. A guide device comprising a guide device support groove having a stepped-down diameter.   The guide device according to claim 1, wherein the slide plate of the guide device has a substantially triangular shape with a sharp tip.   Guide device support grooves provided on the outer periphery of the boring rod are provided at predetermined intervals in the insertion direction, and a support ring of the guide device is fitted in each guide device support groove. The guidance device according to claim 1. A guiding method for drilling a boring rod along the outer wall of an existing buried object buried in the ground,
A slide plate processed with a predetermined width so as to conform to the outer wall shape of the existing embedded object, and an upper portion of the slide plate covers the outer periphery of the boring rod at one or a plurality of locations in the central portion. The guide device includes an annular support ring that is rotatably fitted and fixed to the upper portion of the slide plate, and the support device's support ring is fit into the outer periphery of the boring rod. Using a guide device for a boring rod constituted by a guide device support groove having a diameter and having a paragraph, and transmitting the rotation to the boring rod by a driving device, the boring rod is installed in an existing embedded object. A guiding method characterized by drilling in the ground along the outer wall of the door.

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