JP2010180938A - Timbering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a timbering device which can be assembled in a short time with a simple construction, moreover certainly confront a filling pressure of load material. <P>SOLUTION: A regular octagonal annular frame 11 is installed within a regenerating tube 2 by being supported by supporting members 50-53 using a plurality of frame unit 20 and 30, and an internal pressure, confronting the filling pressure of the load material filled within a clearance S between an established tube 1 and the regenerating tube 2, is formed. Furthermore, an adjusting means 40 is provided that adjusts the internal pressure to the regenerating tube through the supporting member by varying an opening cross-sectional area of the annular frame by adjusting the length L of frame constructing one side of the annular frame. In this configuration, since the length of side constructing one side of the regenerating frame can be adjusted, a suitable internal pressure capable of preventing the deformation of the regenerating tube by confronting the filling pressure of the load material can be formed within the regenerating tube by varying the opening cross-sectional area of the annular frame. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a support apparatus, and more particularly to a support apparatus used in a method for rehabilitating an aging existing pipe.

  When existing pipes such as sewage pipes and sewer pipes become obsolete, in order to rehabilitate the existing pipes, the segments are sequentially connected in the circumferential direction and the length direction of the existing pipes and assembled as rehabilitation pipes. A rehabilitation method for an existing pipe in which a composite pipe is constructed by filling a gap between the inner wall surfaces of the inner wall with a filler (backing material) such as a grout material and curing is known from Patent Documents 1 and 2 below.

  In such a rehabilitation method, filling the gap between the outer circumference of the rehabilitation pipe and the inner wall surface of the existing pipe may cause trouble because the rehabilitation pipe receives the filling pressure due to the filling pressure of the filling material. In order to prevent this, when filling the filler, for example, the support device described in Patent Documents 3 and 4 is inserted into the rehabilitation pipe, and the support device provided in the support device is provided with an annular frame of the support device. Is installed in the rehabilitation pipe to take measures against the filling pressure of the filling material.

JP 2003-286742 A JP 2005-299711 A JP-A-10-121565 JP 2000-297877 A

  However, in the conventional support apparatus, in order to assemble the support apparatus in the rehabilitation pipe, it is necessary to attach and support the annular pipe to a large number of support means. There was a drawback that time and labor were required to make the support work effective.

  The present invention has been made to solve such problems, and a support device that can be assembled in a short time with a simple configuration and can reliably counter the filling pressure of the filler. The issue is to provide.

The present invention for solving the above problems
A support device for supporting and holding the rehabilitation pipe from the inside in order to counter the filling pressure of the filler filled in the gap between the inner circumference of the existing pipe and the outer circumference of the rehabilitation pipe rehabilitating the existing pipe There,
A regular octagonal annular frame with a rectangular or square cross-section as one side;
A plurality of support members attached between the frame and the inner peripheral surface of the rehabilitation pipe to support the annular frame, and act on the rehabilitation pipe to generate internal pressure in the rehabilitation pipe;
Adjusting means for adjusting the frame length constituting at least one side of the annular frame and changing the opening cross-sectional area of the annular frame to adjust the internal pressure to the rehabilitation pipe via the support member;
It is provided with.

  In the present invention, the frame length constituting one side of the regular octagonal annular frame can be adjusted, and by this adjustment, the opening cross-sectional area of the annular frame can be changed, and the internal pressure acting on the inner wall of the rehabilitating pipe can be simplified through the support member. Therefore, it is possible to form an optimal internal pressure in the rehabilitation pipe that prevents deformation of the rehabilitation pipe against the filling pressure of the filler.

  In addition, since the annular frame can be disassembled into a plurality of frame units, the support device can be easily assembled and disassembled in the rehabilitation pipe.

  Further, since the support device is composed of a regular octagonal annular frame, the opening of the annular frame is unobstructed, and an operator can easily pass through the opening, so that a plurality of annular frames can be rehabilitated. It becomes easy to install in the tube length direction of the tube.

It is a front view which shows the structure of the support apparatus of this invention. (A), (b) is a perspective view which shows the external appearance of the frame unit which comprises an annular frame, respectively. It is the front view which showed four frame units which comprise an annular frame. It is explanatory drawing which showed the 1st process of assembling an annular frame. It is explanatory drawing which showed the 2nd process of assembling an annular frame. It is explanatory drawing which showed the 3rd process of assembling an annular frame. It is explanatory drawing which showed the 4th process of assembling an annular frame. It is a perspective view which shows the adjustment means which adjusts the length of the one side of an annular frame. (A), (b) is the perspective view which showed the flame | frame in which the length of one side is each adjusted by an adjustment means. It is the longitudinal cross-sectional view which showed the supporting member which supports an annular frame and an annular frame.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a support device 10 assembled in a rehabilitation pipe 2 for rehabilitating an existing pipe 1 such as a sewer or a waterworks. In order to rehabilitate the aging existing pipe 1 such as a fume pipe, the rehabilitated pipe 2 is assembled in the existing pipe 1. The rehabilitation pipe 2 is assembled by sequentially connecting the segments in the circumferential direction and the pipe length direction as described in, for example, Patent Documents 1 and 2. In addition, the rehabilitation pipe is laid by various other known methods. After the rehabilitation pipe 2 is laid, the gap S between the existing pipe 1 and the rehabilitation pipe 2 is filled with a filler (not shown) such as a grout material, and the existing pipe 1 and the rehabilitation pipe 2 are firmly connected and combined. A tube is constructed.

  The support apparatus 10 supports and holds the rehabilitation pipe 2 from the inside so that the rehabilitation pipe 2 can counter the filling pressure of the filler filled between the inner peripheral surface of the existing pipe 1 and the outer peripheral surface of the rehabilitation pipe 2. In the apparatus, an annular frame 11 made of a metal having a rectangular or square cross section of a regular octagonal shape or a substantially regular octagonal shape, a frame constituting a side of the annular frame 11 and the inner peripheral surface of the rehabilitating pipe 2 is attached to the annular shape. It consists of a plurality of support members (called end thick corners) 50 to 53 that support the frame 11 and act (contact with) the rehabilitation pipe to generate internal pressure in the rehabilitation pipe. Each of the support members 50 to 53 is made of wood having a square or rectangular cross section extending in the tube length direction of the rehabilitated tube 2 (see also FIG. 7).

  In this embodiment, the annular frame 11 is formed into a regular octagonal annular frame by assembling the two frame units 20 and the two frame units 30 partitioned by the double arrow line in FIG. Each frame unit has a size (550 mm) as shown by D in FIG. 1 and can be loaded from a manhole (diameter 600 mm), and is sized to be loaded into the rehabilitation pipe 2 and coupled to another frame unit.

  2A and 2B show the frame units 20 and 30. FIG. As shown in FIG. 2A, the frame unit 20 is configured by joining block-shaped metal frames 21, 22, and 23 each having a hollow rectangular or square cross section.

  The frame 21 is welded such that one end thereof is aligned with the frame 22 so that the inner surfaces thereof form an angle α (135 degrees), and the other end is formed with a circular hole 24a. The coupling plate 24 is fixed by welding. In addition, a metal block 29 having a cylindrical hole 29a having the same diameter as the hole 24a is press-fitted into the frame 21 and fixed in the frame 21. Similarly, the frame 23 is welded so that one end of the frame 23 is aligned with the end surface of the frame 22 at an angle α (135 degrees) with respect to the frame 22, and a metal coupling plate 25 is connected to the other end. It is fixed by welding.

  In order to increase the bonding strength between the frames 21, 22, and 23, metal reinforcing plates 27 and 27 'are welded across the frames. A metal receiving plate 26 for receiving the support members 50, 51, 52, or 53 is fixed substantially at the center of the frame 22, and a metal reinforcing plate 28 for reinforcing the receiving plate 26 is welded to the frame 22. Has been.

  The frame 22 forms a frame on one side of the annular frame 11, and the length of the outer side is L. The frame 23 has a length up to the coupling plate 25 of L / 2 and is coupled to a frame 33 having a similar length of the frame unit 30 to constitute one side of the length L of the annular frame 11. The length of the frame 21 to the coupling plate 24 is shorter than L / 2 by d, and is coupled to the frame 31 having the same length of the frame unit 30 via the adjusting means 40. Constitute. The length of one side can be adjusted by adjusting means, as will be described later.

  The frame unit 30 is shown in FIG. 2 (b), and has a shape substantially similar to that of the frame unit 20, all of which are block-shaped metal frames 31 having a hollow rectangular or square cross section. , 32 and 33 are combined.

  The frame 31 of the frame unit 30 is welded so that one end thereof is aligned with the frame 32 so that the inner surfaces of each frame form an angle of α (135 degrees), and the other end is a metal coupling plate 34. Is fixed by welding. The frame 33 is welded so that one end of the frame 33 is aligned with the end surface of the frame 32 at an angle α (135 degrees) with respect to the frame 32, and a metal coupling plate 35 is welded to the other end. It is fixed by.

  In order to increase the bonding strength of the frames 31, 32, 33, metal reinforcing plates 37, 37 'are welded across the frames. A metal receiving plate 36 for receiving the support members 50, 51, 52, or 53 is fixed substantially at the center of the frame 32, and a metal reinforcing plate 38 for reinforcing the receiving plate 36 is welded to the frame 32. Has been.

  The frame 32 forms a frame on one side of the annular frame 11, and the length of the outer side is L. The frame 33 has a length up to the coupling plate 35 of L / 2 and is coupled to the frame 23 having the same length of the frame unit 20 and constitutes one side of the length L of the annular frame 11. The length of the frame 31 to the coupling plate 25 is shorter than L / 2 by d, and is coupled to the frame 21 having the same length of the frame unit 20 via the adjusting means 40. One side of the length L of the annular frame 11 is Constitute. The length of one side can be adjusted by adjusting means, as will be described later.

  FIG. 3 shows a view when the frame units 20 and 30 constituting the annular frame 11 are viewed from the front.

  As shown in FIG. 5, the adjusting means 40 includes a metal mounting plate 43 on which conical protrusions 43a to 43d are formed, and a screw fixed at substantially the center of the surface opposite to the surface on which the protrusions are formed. 41 and an operation disk 42 screwed with the screw 41, and operation handles 42a and 42b are fixed to the operation disk 42. The protrusions 43 a to 43 d of the mounting plate 43 can be fitted into the holes 34 a to 34 d of the coupling plate 34 of the frame unit 30, and the outer diameter of the screw 41 is a hole 29 a formed in the block 29 in the frame 21. In addition, the diameter of each hole 24a formed in the coupling plate 24 is slightly smaller than that of the hole 24a so that the screw 41 can be fitted into the hole 29a of the block 29 through the coupling plate hole 24a.

  In FIG. 5 and FIG. 6 below, the reinforcing plate that reinforces the coupling of the frames is not shown.

  A method of installing the support device configured as described above in the rehabilitation pipe 2 will be described below.

  It is assumed that the existing pipe 1 is constructed with a rehabilitation pipe 2 using various known methods. As shown in FIG. 3, the annular frame 11 is divided into four frame units, carried into a manhole (not shown), and brought into the rehabilitation pipe 2.

  First, as shown in FIG. 1, the supporting members 50 to 53 are temporarily fixed loosely (flexibly) to the upper part, the right side wall center part, the bottom part and the left side wall center part of the rehabilitation pipe 2 so as not to become unstable. As shown in FIG. 4 a, the first frame unit 20 is rotated 180 degrees to the right, and the bottom support member 52 is fitted into the receiving plate 26. Next, as shown in FIG. 4b, the next frame unit 30 is rotated 90 degrees to the left, the left support member 53 is fitted into the receiving plate 36, and both frame units 20, 30 are supported by the support members 52, 53. To support. Then, the coupling plate 25 of the bottom frame unit 20 and the coupling plate 35 of the left frame unit 30 are fixed by a fixing means such as a bolt and nut to couple the frame units 20 and 30 together.

  Subsequently, as shown in FIGS. 4 c and 6 (a), the operating disk 42 is screw-rotated so that the operating disk 42 of the adjusting means 40 is located at the approximate center of the screw 41, and the screw 41 of the adjusting means 40 is rotated. Is inserted into the hole 29a of the block 29 fixed in the frame 21 of the third frame unit 20, and is fitted. Then, the upper support member 50 is fitted to the receiving plate 26 of the frame unit 20, and the protrusions 43 a to 43 d of the mounting plate 43 of the adjusting means 40 are respectively inserted into the corresponding holes of the coupling plate 34 of the left frame unit 30. To do. This insertion is performed smoothly because the projections 43a to 43d of the mounting plate 43 are conical.

  Subsequently, as shown in FIG. 4d, the last frame unit 30 is rotated 90 degrees to the right so that the right support member 51 is fitted to the receiving plate 36, and the coupling plate 35 and the upper frame unit 20 are connected. The coupling plate 25 is fixed by fixing means such as bolts and nuts. The adjusting means 40 is attached between the frames 21 and 31 by the same process as described above.

  Thus, as shown in FIG. 1, an annular frame 11 having a substantially regular octagonal shape, which is composed of a frame having a length of L on each outer side and a length corresponding to each side on the inner side, is assembled.

  In this state, the rehabilitation tube 2 is supported and held by receiving an appropriate internal pressure by the annular frame 11 and the support members 50 to 53. Further, when the support is performed with a strong internal pressure, or when the internal pressure is not sufficient due to the manufacturing error or assembly accuracy of the frame unit and a sufficient support holding effect cannot be obtained with respect to the annular frame 11, the adjustment is performed by the adjusting means 40. The frame length of one side to which the means 40 is attached is increased. If the internal pressure is too strong, the frame length is shortened.

  Such adjustment of the internal pressure is performed by rotating the operation disk 42 using the handles 42a and 42b of the adjusting means, and moving the operation disk 42 rightward or leftward as viewed in FIG. When the operation disk 42 moves in the right direction, the screw 41 is loosely fitted in the cylindrical hole 29a of the block 29 fixed in the frame 21, so that the coupling plate 24 and the frame 21 also move in the same direction. By this movement of the frame, the frame length of one side of the annular frame 11 provided with the adjusting means 40 changes from L to L ′ and becomes longer. By increasing the frame length of one side of the annular frame, tension is applied to each frame unit of the annular frame 11 so that the opening area of the annular frame 11 is increased and the diameter of the annular frame is increased. The internal pressure acting on the rehabilitation pipe 2 via the pressure also increases. As a result, the filler filled between the existing pipe 1 and the rehabilitation pipe 2 can counter the external pressure applied to the rehabilitation pipe 2 acting from the outside, and the deformation of the rehabilitation pipe 2 due to the filler injection can be prevented. When the frame 21 moves to the right and the internal pressure is too strong, the operation disk 42 is moved in the reverse direction to adjust the internal pressure.

  If a block similar to the block 29 that is press-fitted into the frame 21 of the frame unit 20 is press-fitted into the frame 31 of the frame unit 30, the frame units 20 and 30 are symmetrical and have the same frame unit. Thus, an inexpensive annular frame can be obtained, and the screw 41 of the adjusting means 40 may be inserted into the block of the frame unit in the reverse direction, so that the assembly work of the annular frame is facilitated.

  Such adjustment of the frame length of one side of the annular frame 11 can be performed not only at one place but also at the opposite side frame as shown in FIG. 1, so that an equal internal pressure is generated in the rehabilitation pipe 2. Can do. Further, the adjusting means 40 can be provided not only on the two sides shown in FIG. 1 but also between the frames on the other sides, and a more uniform and strong internal pressure can be generated in the rehabilitation pipe 2.

  In addition, as shown in FIG. 7, a plurality of annular frames 11 are provided at a predetermined distance in the tube length direction in which the existing tube 1 and the rehabilitated tube 2 extend (two in FIG. 7 are illustrated by virtual lines). An internal pressure that can counter the filling of the filling material can be generated throughout the rehabilitation pipe.

  In this way, when a plurality of annular frames are installed in the tube length direction and the adjustment by the adjusting means is completed for each annular frame, the filler is injected into the gap S between the existing tube 1 and the rehabilitated tube 2 and both tubes 1 2 is firmly connected to construct a composite tube.

  Thereafter, the annular frame 11 is disassembled into the frame units 20 and 30 in the reverse order of assembling the annular frame 11 and discharged from the rehabilitation pipe 2, and the support members 50 to 53 temporarily fixed to the rehabilitation pipe 2. Also remove.

  In the embodiment described above, the annular frame is configured as a regular octagon, but may be a regular hexagon. Further, the cross section of the annular frame may be circular as well as rectangular or square. Moreover, although the adjustment means 40 was provided in the frame of 2 sides which the regular octagon of an annular frame opposes, only a frame of 1 side may be sufficient. Further, as shown in FIG. 5, the support members 50 to 53 extend continuously in the tube length direction of the rehabilitation tube 2, but are approximately the same as the width of the annular frame in the tube length direction or two to three times longer than that. It may be.

  In the above-described embodiment, the annular frame is disassembled into four frame units 20 and 30 and assembled from these four frame units. You may make it assemble from one frame unit.

DESCRIPTION OF SYMBOLS 1 Existing pipe 2 Rehabilitation pipe 10 Support construction apparatus 11 Annular frame 20 Frame unit 21-23 Frame 24, 25 Connection plate 29 Block 29a Insertion hole 30 Frame unit 31-33 Frame 34, 35 Connection plate 40 Adjustment means 42 Operation disk 43 Installation Plate 50-53 Support member (end thick corner)

Claims (5)

A support device for supporting and holding the rehabilitation pipe from the inside in order to counter the filling pressure of the filler filled in the gap between the inner circumference of the existing pipe and the outer circumference of the rehabilitation pipe rehabilitating the existing pipe There,
A regular octagonal annular frame with a rectangular or square cross-section as one side;
A plurality of support members attached between the frame and the inner peripheral surface of the rehabilitation pipe to support the annular frame, and act on the rehabilitation pipe to generate internal pressure in the rehabilitation pipe;
Adjusting means for adjusting the frame length constituting at least one side of the annular frame and changing the opening cross-sectional area of the annular frame to adjust the internal pressure to the rehabilitation pipe via the support member;
A support apparatus characterized by comprising:   The support apparatus according to claim 1, wherein the annular frame is configured by combining a plurality of frame units.   The said frame unit is comprised from a hollow frame, The support work apparatus of Claim 2 characterized by the above-mentioned.   The supporting device according to any one of claims 1 to 3, wherein the adjusting means is attached between frames constituting a side whose length is adjusted.   The support device according to claim 3 or 4, wherein the adjusting means is attached between frames constituting a plurality of sides of the annular frame.

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