JP3592257B2 - Manhole neck waterproof structure and waterproof method - Google Patents

Description

[0001]
The present invention relates to a manhole neck waterproof and waterproofing method, details performs waterproofing execution during height adjustment work of the existing manhole down the road, manhole neck waterproof structure and waterproof to prevent leakage entrance of rainwater into the manhole interior It concerns the construction method .
[0002]
[Prior art]
Conventionally, when constructing the height of existing manholes or constructing manholes under roads, it is necessary to adjust the manhole cover up and down with respect to the inclination of the road surface, and for this purpose the manhole cover height adjustment method or adjustment device Have been proposed.
For example, as shown in FIG. 8, an adjustment bolt b is erected on the upper surface of a concrete block a constituting the upper part of the manhole, and an adjustment nut c screwed to the adjustment bolt b is adjusted to lower the inclination of the lid receiving frame d. adjust. Then, the filled concrete is poured into the gap space between the concrete block a and the lid receiving frame d.
[0003]
[Problems to be solved by the invention]
By the way, in the upper part of the manhole constructed as described above, rainwater often leaks from the outside of the manhole to the inside of the manhole due to the passage of a vehicle or the like.
Specifically, it has been confirmed that there is little phenomenon of leakage along the joint surface between the upper surface of the concrete block and the filled concrete or the joint surface between the filled concrete and the lid receiving frame, which is the joint surface of different materials.
[0004]
When rainwater or the like leaks into the manhole in this manner, it may cause corrosion of a communication conduit or the like laid in the manhole, and further, it is feared that the cable body may be adversely affected.
[0005]
An object of the present invention is to solve these problems, and an object of the present invention is to provide a manhole neck waterproof structure that prevents leakage of rainwater or the like into the inside of the manhole after adjusting the manhole cover height.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 has a concrete block on an upper part of a manhole body built under a road, and has an upper surface of the concrete block and a lid receiving frame installed thereon. Adjusting the gap with the installation flange by the lid height adjustment device, pouring the filler into the gap space and curing it, and adjusting the lid fitted to the lid receiving frame to the road surface height at the time of lid height adjustment In the manhole neck waterproof structure, a first water blocking member is continuously arranged on the upper surface side of the concrete block inside the lid height adjusting device , and the lid height on a lower surface side of a mounting flange of the lid receiving frame. the second water stop member continuously disposed on the inner side of the adjusting device, the water leaking into the manhole outside inside manhole, characterized in that so as to cut off by the respective water-shutoff member
[0007]
The invention according to claim 2 of the present application has a concrete block on an upper part of a manhole body built under a road, and a gap between an upper surface of the concrete block and a mounting flange of a lid receiving frame installed thereon. In the manhole neck waterproofing method at the time of the lid height adjustment to adjust the lid fitted to the lid receiving frame to the road surface level by adjusting the lid with a lid height adjusting device, pouring the filler into the space, and curing the lid fitted to the lid receiving frame. A first water blocking member is continuously arranged on the upper surface side of the concrete block on the inner side of the lid height adjusting device, and the inner surface of the lid height adjusting device on the lower surface side of the installation flange of the lid receiving frame. Continuously arranging the second water-stopping member on one side, and after the step, performing the lid height adjustment to fill the space between the upper surface of the concrete block and the lower surface of the mounting flange of the lid receiving frame. Characterized by a step of pouring.
[0008]
According to the present invention, the first water-stopping member and the first water-stopping member are respectively provided on the joint surface between the upper surface of the concrete block made of different materials and the filler and the joint surface between the upper surface of the filler and the installation flange of the lid receiving frame. (2) Since the water-stopping member is disposed, the first water-stopping member and the second water-stopping member can block rainwater leaking along each of the joint surfaces, and as a result, rainwater into the inside of the manhole Leakage can be prevented. Further, since the first water stopping member and the second water stopping member are continuously arranged on the inner side of the lid height adjusting device, the first water stopping member and the second water stopping member are made of concrete. Blocks not only rainwater leaking along the joint surface between the upper surface of the block and the filler, and the joint surface between the upper surface of the filler material and the installation flange of the lid receiving frame, but also rainwater leaking from the height adjustment device. be able to.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a vertical sectional view of an upper part of a manhole, and FIG. 2 is a perspective view of an upper concrete block side. In FIG. 1, reference numeral 1 denotes a manhole constructed under the road, and a lower part of the manhole 1 is connected to a lower part of the manhole 1 through a communication pipe (not shown), for example. First, it is installed based on the height to the road surface.
[0019]
In the manhole 1, various concrete blocks 2 are sequentially stacked on a foundation fixed with a foundation pile, a grit stone, or the like, and an adhesive such as an epoxy resin impregnated body is disposed at each joint and bonded to prevent slippage. Installed. The upper concrete block 3 is stacked on the uppermost side of the concrete block 2, the upper surface of the upper concrete block 3 is formed flat, and an adjustment bolt 51 of a lid height adjustment device 5 described later is embedded therein. Although not shown, a female screw may be embedded in the upper surface of the upper concrete block 3 and the adjusting bolt 51 may be erected on the female screw by screwing.
[0020]
In FIG. 1, reference numeral 4 denotes a metal lid receiving frame, and a mounting flange 41 is integrally formed below the lid receiving frame 4, and a plurality of insertion holes 42 are provided near the outer periphery of the mounting flange 41. Have been. The cover 43 of the manhole 1 is detachably fitted in the cover receiving frame 4. Then, the lid receiving frame 4 is adjusted in height with respect to the upper surface of the upper concrete block 3 according to the inclination of the road surface by the lid height adjusting device 5, and is provided in the space between the upper surface of the upper concrete block 3 and the installation flange 41 of the lid receiving frame 4. Is filled with filled concrete M as a filler.
[0021]
Further, as shown in FIG. 1, a first water stopping member 6 is disposed on the upper surface of the upper concrete block 3, and a second water stopping member 7 is disposed on the lower surface of the installation flange 41 of the lid receiving frame 4.
The first water-stopping member 6 and the second water-stopping member 7 are obtained by mixing and vulcanizing a highly water-absorbent resin as a water-swellable resin having a property of expanding in volume by absorbing water and a synthetic rubber. It is made of a water-swellable rubber material and has a required thickness. When arranging the first water-stopping member 6 and the second water-stopping member 7, the first water-stopping member 6 and the second water-stopping member 7 may be attached to the upper surface of the upper concrete block 3 and the lower surface of the installation flange 41 of the lid receiving frame 4 with an adhesive. On the upper surface of the block 3, it may be merely spread. As for the arrangement of the first water stopping member 6 and the second water stopping member 7, as shown in FIG. 2, they are arranged continuously on the inner side of the lid height adjusting device 5.
[0022]
As shown in FIG. 5, the first water blocking member 6 arranged on the upper surface side of the upper concrete block 3 is arranged by fitting a lower portion thereof into a concave groove 61 provided in advance on the upper surface of the upper concrete block 3. In this case, the first water stopping member 6 may move or deform due to the flow of the filled concrete M poured into the space between the upper surface of the upper concrete block 3 and the installation flange 41 of the lid receiving frame 4. And no adhesive bonding is required.
Here, FIG. 2 shows the manhole 1 formed in a square shape, but it goes without saying that the manhole 1 may be formed in a circular shape.
[0023]
Next, a procedure for constructing the manhole neck waterproof structure of the present invention will be described in detail with reference to FIGS.
First, as shown in FIG. 2, the first water blocking member 6 is stuck or spread with an adhesive on the inner side of the adjustment bolt 51 erected on the upper surface of the upper concrete block 3. 3, the tapered coil spring 52 is inserted into the adjustment bolt 51 and the insertion hole 42 formed in the installation flange 41 of the lid receiving frame 4 is inserted through the adjustment bolt 51 as shown in FIG. To set the lid receiving frame 4. At this time, the second water-stop member 7 is continuously arranged in advance on the inner side of the insertion hole 42 on the back surface of the installation flange 41 of the lid receiving frame 4 by pasting with an adhesive.
[0024]
Next, an adjustment nut 53 is screwed into the adjustment bolt 51 from above the lid receiving frame 4, and the height of the lid receiving frame 4 is adjusted to the road surface while pressing the tapered coil spring 52 by tightening the adjusting nut 53. Adjust to
Then, an inner form 8 made of a rubber material that is elastically deformed is erected over the inner circumferential surface of the installation flange 41 of the lid receiving frame 4 and the inner circumferential surface of the upper concrete block 3. Then, the inner peripheral side of the space between the upper surface of the upper concrete block 3 and the installation flange 41 of the lid receiving frame 4 is closed.
[0025]
Next, on the outer peripheral surface of the upper concrete block 3, an outer mold frame 9 made of a flexible polyolefin foam material or a flexible rubber material extending above the installation flange 41 of the lid receiving frame 4 is provided. A ring-shaped filling port 10 for pouring the filling concrete M is formed between the inner peripheral surface of the mold frame 9 and the outer peripheral surface of the installation flange 41 of the lid receiving frame 4.
Then, between the upper surface of the upper concrete block 3 and the installation flange 41 of the lid receiving frame 4 from the ring-shaped filling port 10, filling concrete M which can be hardened in 2 to 3 hours is filled. At this time, the filling concrete M may be filled up to the upper part of the installation flange 41 of the lid receiving frame 4, and the adjusting nut 53 may be closed with the filling concrete M, so that the looseness of the adjusting nut 53 causes the rattling of the lid receiving frame 4. It is possible to prevent rainwater from leaking from the insertion hole 42 formed in the installation flange 41 of the lid receiving frame 4.
[0026]
Leakage of rainwater into the manhole 1 is reliably shut off by the first water stopping member 6 and the second water stopping member 7 installed as described above. That is, rainwater leaking along the joint surface between the upper concrete block 3 and the filled concrete M and the joint surface between the filled concrete M and the lid receiving frame 4 are blocked by the respective water stopping members 6 and 7, respectively. Further, when rainwater permeates into each of the water stopping members 6, 7, since each of the water stopping members 6, 7 expands in volume, the sealing property at the joint surface is improved, and leakage of rainwater is more reliably performed. Can be shut off.
[0027]
Next, another embodiment of the lid height adjusting device 5 will be described with reference to FIGS.
In the above-described embodiment, the coil spring 52 used in the lid height adjusting device 5 is formed in a tapered shape. However, as shown in FIG. May be a barrel-shaped coil spring 52 ′ having a smaller coil diameter than the center portion. In this case, not only can the height adjustment range of the lid receiving frame 4 be increased, The arrangement space of the first water blocking member 6 on the upper surface side of the upper concrete block 3 can be widened.
[0028]
The embodiment of the lid height adjusting device 5 shown in FIG. 7 is of a nut type that does not use the coil spring 52, and an adjusting nut 53 is screwed into an adjusting bolt 51 erected on the upper surface of the upper concrete block 3. After that, the insertion hole 42 of the lid receiving frame 4 is inserted into the adjusting bolt 51, and the lid receiving frame 4 is set on the adjusting nut 53. Next, the height of the lid receiving frame 4 is adjusted to the inclination of the ground by adjusting the height with the adjusting nut 53, and the lid receiving frame 4 is fixed with the fastening nut 54. The lid height adjusting device 5 of this nut type is large in size. This is advantageous for the manhole 1.
[0029]
As described above, by using the manhole neck waterproof structure of the present invention, the joint surface between the upper surface of the concrete block made of different materials and the filler, and the joint surface between the upper surface of the filler and the installation flange of the lid receiving frame. It is possible to block rainwater leaking along, and as a result, it is possible to prevent rainwater from leaking into the inside of the manhole, thereby preventing corrosion of communication pipes and the like inside the manhole due to rainwater. . Further, since the first water stopping member and the second water stopping member are continuously arranged on the inner side of the lid height adjusting device, the first water stopping member and the second water stopping member are made of concrete. Blocks not only rainwater leaking along the joint surface between the upper surface of the block and the filler, and the joint surface between the upper surface of the filler material and the installation flange of the lid receiving frame, but also rainwater leaking from the height adjustment device. be able to.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an upper part of a manhole.
FIG. 2 is a perspective view of an upper concrete block side.
FIG. 3 is a partial longitudinal sectional view of an upper part of a manhole showing a filling state of a filling concrete.
FIG. 4 is a partial longitudinal sectional view of an upper part of a manhole showing a hardened state of filled concrete.
FIG. 5 is a partial longitudinal sectional view of an upper part of a manhole showing another arrangement state of a first water blocking member.
FIG. 6 is a partial longitudinal sectional view of an upper part of a manhole showing another type of a coil spring.
FIG. 7 is a partial vertical sectional view of an upper part of a manhole showing another type of the height adjusting device.
FIG. 8 is an explanatory diagram of a conventional example.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 manhole 2 concrete block 3 upper concrete block 4 lid receiving frame 41 installation flange 42 insertion hole 43 lid 5 lid height adjusting device 51 adjusting bolt 52 tapered coil spring 52 'barrel-shaped coil spring 53 adjusting nut 54 tightening Nut 6 First water-stopping member 61 Depressed groove 7 Second water-stopping member 8 Inner mold 9 Outer mold 10 Ring-shaped filling port M Filled concrete as filler

Claims (2)

A concrete block is provided at the top of the manhole body built under the road, and the gap between the upper surface of the concrete block and the mounting flange of the lid receiving frame installed thereon is adjusted by a lid height adjusting device, and the gap is adjusted. In the manhole neck waterproofing structure at the time of lid height adjustment , the filler is poured into the space and hardened, and the lid fitted to the lid receiving frame is leveled to the road surface height,
A first water blocking member is continuously arranged on the upper surface side of the concrete block inside the lid height adjusting device, and the inner side of the lid height adjusting device on the lower side of the installation flange of the lid receiving frame. the second water stop member continuously disposed,
A watertight structure for a neck portion of a manhole, wherein water leaking from the outside of the manhole into the inside of the manhole is blocked by each of the water stopping members. A concrete block is provided at the top of the manhole body built under the road, and the gap between the upper surface of the concrete block and the mounting flange of the lid receiving frame installed thereon is adjusted by a lid height adjusting device, and the gap is adjusted. In the manhole neck waterproofing method at the time of lid height adjustment, the filler is poured into the space and hardened, and the lid fitted to the lid receiving frame is leveled to the road surface level,
  A first water blocking member is continuously arranged on the upper side of the concrete block inside the lid height adjusting device, and the inner side of the lid height adjusting device on the lower side of the mounting flange of the lid receiving frame. A step of continuously arranging the second water blocking member on the side;
  After the step, a step of adjusting the lid height and pouring a filler between the upper surface of the concrete block and the lower surface of the installation flange of the lid receiving frame is provided.

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