JPH0510078Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a construction jig used for covering the inner peripheral surface of a conduit, tunnel, etc., excluding the lower part, with a lining material.

(Prior Art) Recently, pipes such as public ditches and sewer pipes with an inner diameter of about 1 to 10 m are constructed using the shield method or the propulsion method. Concrete conduits, tunnels, and other conduits constructed using such construction methods crack due to external pressure such as earth pressure, groundwater, or changes in external pressure due to earthquakes, ground subsidence, and the like. Groundwater, etc. seeps through the cracks that occur. In addition, when sewage flows through a sewer pipe, it is corroded by the generated hydrogen fluid.

In other words, sulfate, a sulfur compound contained in large amounts in sewage, is decomposed by anaerobic bacteria and hydrogen sulfide is generated. This produces sulfuric acid gas, and the generated sulfuric acid gas severely corrodes concrete pipes and cast iron products. In this way, in order to prevent water droplets from falling from the upper inner circumferential surface and corrosion of concrete due to hydrogen sulfide, it is considered that the inner circumferential surface of the pipe, except for the lower part, should be covered with, for example, a synthetic resin lining material. It is being

Usually, the lining material is in the shape of a flexible plate, and a large number of lining materials are arranged in parallel in the pipe axis direction, each along the inner peripheral surface of the pipe except for the lower part. Cover the entire inner circumferential surface in the axial direction of the tube, except for the lower part. Such lining materials are usually attached to the pipe wall using anchor bolts and nuts. That is, a through hole is formed in the lining material to allow the anchor bolt to pass through,
A method is used in which an anchor bolt is driven into the pipe wall through the through hole while the lining material is aligned with the wall surface, and then a nut is screwed onto the anchor bolt and tightened.

(Problem to be solved by the invention) However, in the above method, in order to ensure that the wall surface and the lining material are in close contact, it is necessary to shorten the interval between anchor bolts and use a large number of anchor bolts. As a result, the work becomes extremely complicated and economical efficiency is also impaired.

Water leakage from joints with adjacent lining materials,
Alternatively, in order to prevent permeation of acid gas, it is necessary to install a joint member in close contact with the inner peripheral surfaces of both lining materials at the joint, but if each lining material and wall surface are not in close contact with each other, The inner circumferential surfaces of the lining materials are stepped in the radial direction, making it impossible to reliably attach the joining member to the inner circumferential surfaces of both lining materials.

In order to solve the above problems, the applicant first proposed a conduit consisting of a push-up member having a push-up part that moves the lining material along the circumferential direction and a fixing member that fixes the other end of the lining material. We proposed a fixing device for the inner peripheral surface lining material.

However, with the above fixing device, the structure of the pressing member is slightly complicated, which impairs economic efficiency, and it is also necessary to avoid widening the gap between both ends of the lining material, that is, the lower surface of the pipe where concrete is exposed. I can't. Therefore, if the flow rate of sewage is low and the lowest water level is lower than the lining part, there is a risk that the exposed concrete part at the bottom of the inner peripheral surface of the pipe will be corroded by hydrogen sulfide.

(Means for Solving the Problems) In view of the above-mentioned conventional problems, the present invention covers the inner peripheral surface of the conduit except for the lower part with a lining material, and uses a fixing device with a complicated structure. The object of the present invention is to provide a construction jig that is easy to construct, requires only a short time, and allows the area of the inner circumferential surface covered with the lining material to be as large as possible without the need for The gist is that when covering the inner circumferential surface of the conduit except for at least the lower part with a flexible plate-shaped lining material, one end of the lining material is placed around the inner circumferential surface of the conduit. A construction jig for moving the lining material toward the other end along the direction, the leg body having an engaging portion at one end that engages directly or indirectly with the other end of the lining material;
A leg body provided at one end with a pressing part that directly or indirectly presses one end of the lining material,
The other end portions are connected so as to be openable and closable to form a V-shape, and an opening/closing device for opening and closing the legs is provided between the intermediate portions of the legs. Lining on the inner peripheral surface of the pipe. Exists in jigs for construction of materials.

(Example) An example of the present invention will be described below with reference to the drawings.

The construction jig of the present invention, as shown in Figure 1,
One ends of the two legs 11 and 11' are connected to each other via screws 12 so that they can be opened and closed in a V-shape, and the other end of the legs 11 is fixed to the inner peripheral surface of the pipe. An engaging portion 13 that engages with one end of the lining material
A pressing portion 14 for pressing the other end of the lining material along the circumferential direction is provided at the other end of the leg 11'. In addition, the legs 11,1
The opening/closing device 15 provided between the intermediate portions 1' includes a turnbuckle 151, threaded rods 152, 153, and screws 154, 154. That is, a threaded rod 152 with a left-hand thread and a threaded rod 153 with a right-hand thread are connected to the screws 154 and 15.
4, the threaded rods 152,
153 is screwed onto the turnbuckle 151. In other words, the threaded rod 152 is the turnbuckle 15
The screw rod 153 is screwed into the left screw hole 151a of No. 1, and the screw rod 153 is screwed into the right screw hole 151b. Therefore,
When the turnbuckle 151 is rotated from top to bottom in the drawing, the threaded rods 152, 153
is pushed out from the turnbuckle 151, thereby opening the legs 11, 11' to the left and right.

Next, a method for covering a lining material using the construction jig 1 of the present invention will be explained with reference to FIGS. 2 and 3.

First, the fixing member 41 is fixed near the lower part of the inner peripheral surface 31 of the concrete sewer pipe 3.

The fixing member 41 extends in the tube axis direction and has a Z-shaped cross section. This fixing member 41 has a mounting portion 41a located below in the circumferential direction, an engaging portion 41b located above in the circumferential direction, and a connecting portion 41c joining the two. The attachment part 41a abuts on the inner circumferential surface 31 of the sewer pipe 3, and the anchor bolt 5
1 and nuts 52 to the inner circumferential surface 31.

Inserting one end portion 21 of a flexible plate-shaped lining material 2 such as a vinyl chloride plate into the gap between the engaging portion 41b, the connecting portion 41c, and the inner peripheral surface 31,
The lining material 2 is curved along the inner circumferential surface 31, and another fixing member 42 is engaged with the other end 22. The fixing member 42 has substantially the same shape as the fixing member 41 described above, and includes a mounting portion 42a, an engaging portion 42b, and a connecting portion 42c.

Next, the construction jig 1 is used.

The engaging part 13 provided at the end of the leg 11 is fixed to the inner circumferential surface 31, and the one end 21 of the lining material 2
is engaged with the connecting portion 41c of the fixed member 41 into which is inserted. Pressing part 1 provided at the end of the leg 11'
4 is engaged with the connecting portion 42c of the fixing member 42 that is engaged with the other end portion 22 of the lining material 2. In this state, while pressing the construction jig 1 toward the inner peripheral surface 31, the turnbuckle 151 is rotated using a spanner or the like. As a result, the legs 11, 11' open left and right, and the other end 22 of the lining material 2 engaged with the fixing member 42
moves along the inner circumferential surface 31 toward the one end 21 side of the lining material 2 inserted into the fixing member 41 . Due to this movement of the other end portion 22, the entire lining material 2 is pressed against the inner circumferential surface 31 and comes into close contact with it. In this closely attached state, the fixing member 4
By driving the anchor bolt 61 into the mounting portion 42a of No. 2 and screwing the nut 62 into it,
The fixing member 42 is fixed to the inner peripheral surface 31. The lining material 2 is firmly fixed in close contact with the inner circumferential surface 31 of the concrete sewer pipe 3 by the fixing members 41, 42 and the repulsive force of the lining material 2 itself trying to return to its original position.

In the above embodiment, a fixing member having a Z-shaped cross section was used, but in this case, anchor bolts etc. cannot be directly attached to the ends 21 and 22 of the lining material 2 in the circumferential direction. , each end 2
There is no need to perform processing such as perforation on the lining materials 1 and 22, and therefore the durability of the lining material 2 is improved.

However, the present invention is not limited thereto, and the ends 21 and 22 of the lining material may be directly fixed to the inner peripheral surface 31 using, for example, anchor bolts and nuts. Anchor bolts 51, 61 and nuts 5 used here
2, 62 and the fixing members 41, 42 are preferably made of synthetic resin, stainless steel, or the like, which will not be corroded by hydrogen sulfide.

In this way, by arranging a plurality of coatings of the lining material 2 in parallel, the inner circumferential surface 31 of the concrete sewer pipe 3 except for the lower part is covered over the entire area in the pipe axis direction.

In addition, in the present invention, if the engaging part 13 of the leg 11 and the pressing part 14 of the leg 11' are provided with protruding pieces corresponding to the width of the lining material 2, the lining material 2 can be stably circumferentially It is preferable because it can be moved in the direction.

(Effects of the invention) The jig for installing lining material on the inner circumferential surface of a pipe according to the present invention is constructed as described above, so that it can be installed by rotating a turnbuckle without using a large number of anchor bolts. Since the lining material can be brought into close contact with the inner circumferential surface of the road, work efficiency is significantly improved.

The number of anchor bolts is small, and
The fixing member used also has a simple structure, so it is also economical.

Since the lining material adheres closely to the inner circumferential surface of the pipe, the inner circumferential surfaces of adjacent linings are flush with each other without any difference in level. Can be installed on.

In addition, since it is possible to use a fixing member with a simple structure, it is possible to narrow the gap between both ends of the lining material in the circumferential direction, and even when the flow rate of sewage is low, Exposed concrete areas will no longer be corroded by hydrogen sulfide.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an embodiment of the construction jig of the present invention; The figure is a sectional view of a sewer pipe whose inner peripheral surface is coated with a lining material by using the construction jig of the present invention. 1... Construction jig, 11, 11'... Leg body, 1
3... Engaging part, 14... Pressing part, 15... Turnbuckle, 2... Lining material, 3... Sewer pipe,
41, 42...fixing member.

Claims (1)

[Claims for Utility Model Registration] 1. When covering the inner peripheral surface of the conduit except for at least the lower part with a flexible plate-shaped lining material,
A construction jig for moving one end of the lining material toward the other end along the circumferential direction of the inner circumferential surface of the pipe, the tool comprising an engagement tool that directly or indirectly engages the other end of the lining material. A leg body having a joining part at one end and a leg body having a pressing part at one end that directly or indirectly presses one end of the lining material are connected to each other so that the other end can be opened and closed. V
1. A jig for applying a lining material to an inner circumferential surface of a pipe, the jig forming a letter shape and having an opening/closing device for opening and closing the legs between intermediate portions of the legs. 2. The pipe according to claim 1 of the utility model registration claim, wherein the opening/closing device is formed by two threaded rods attached to two legs so as to be freely intersecting, and connected by screwing into a turnbuckle. A jig for installing lining material on the road surface.