JP2977364B2 - Manhole cover height adjustment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole cover height adjusting method for adjusting the height of a cover section when constructing a manhole under a road, and more particularly to a manhole cover height adjusting method for a sewer assembly manhole. It is related to a construction method suitable for.

[0002]

2. Description of the Related Art Conventionally, when building a manhole under a road,
It is necessary to adjust the cover of the manhole up and down with respect to the inclination of the road surface. For this purpose, various manhole cover height adjusting methods or adjusting devices have been proposed. For example, the present applicant has proposed a lid height adjusting method as shown in FIGS. That is, when the manhole A is constructed under the road B, the road surface is inclined at an angle of θ with respect to the vertical line. Concrete blocks).

A selected adjusting ring D is stacked on the upper side of the sloping wall block C. Socket bolts E corresponding to the height of the adjusting ring D are arranged at substantially equal intervals in the upper circumferential direction of the sloping wall block C. And install the adjustment ring D in three places. A fixing bolt F is screwed into the socket bolt E to stand upright, a taper coil spring G and one washer I are inserted into the fixing bolt F, and then the lid receiving frame H is inserted and installed. A nut J is screwed onto the fixing bolt F from above the lid receiving frame H via a washer I, and the height of the lid receiving frame H is adjusted to the road surface height while elastically deforming the tapered coil spring G by tightening the nut J. . An outer frame K and an inner frame L are arranged along the outer peripheral surface and the inner peripheral surface of the adjustment ring D and the lid receiving frame H, and an ultra-high speed is provided in a gap between the outer frame K and the inner frame L. The mortar M is filled and cured.
When the mortar M has hardened, the outer mold K and the inner mold L are removed, the outside is backfilled, and the iron cover N is fitted to the lid receiving frame H.

[0004]

In the above-mentioned conventional manhole cover height adjusting method, the height adjustment is performed by a simple operation of elastically deforming the tapered coil spring G by tightening the nut J, and is steplessly about 50 mm. This makes it possible to make fine adjustments, and is effective in building a prefabricated manhole on a slope. By the way, the height of the lid is adjusted as described above, and the outer periphery of the lid receiving frame H is paved at the same level as the road surface to release the road traffic. 150 to 4 per square cm
A load of 00 kg is applied, and for a long period of time, a portion of the ultra-high-speed curing mortar M is collapsed due to a large load or vibration and the iron cover N
In addition, there is a problem that the portion of the lid receiving frame H may be lower than the road surface. The present invention has been made to solve the above problems.

[0005]

In order to achieve the above object, the present invention provides a manhole cover height adjusting method for adjusting the height of a cover portion when building a manhole under a road.
A fixing bolt is erected from the upper concrete block of the manhole, this fixing bolt is inserted into the lid receiving frame, a nut is screwed from above the lid receiving frame, and an elastic supporting material is interposed between the upper concrete block and the lid receiving frame, By tightening or loosening the nut, the elastic support is elastically deformed to adjust the lid receiving frame up and down so that it is flush with the road surface and the outer formwork is formed along the outer and inner peripheral surfaces of the upper concrete block and the lid receiving frame. And an inner formwork is provided, and the height adjustment gap between the upper concrete block and the lid receiving frame is filled with mortar or the like so as to be hardened, and between the upper concrete block and the lid receiving frame, an upper concrete block is provided. And a cylinder which has a height in contact with the lid receiving frame and which can be compressed and deformed in accordance with the height adjustment of the lid receiving frame. It has to fill the barrel or the like, the cylindrical body, the fixing bolt, it provided located on the outer periphery of the elastic support member, respectively characterized.

[0006]

According to the above means, the manhole cover height adjusting method of the present invention performs the following operations. Between the upper concrete block and the lid receiving frame, a cylinder having a height in contact with the upper concrete block and the lid receiving frame, and capable of being compressed and deformed in accordance with the height adjustment of the lid receiving frame is provided. Since the resin mortar that cures in time is filled, even if the mortar etc. deteriorates and collapses due to the load from the road surface, the outer periphery of the resin mortar cured in the cylinder is protected by the cylinder. Since it is held in a columnar shape, it does not collapse easily, and the support strength of the lid receiving frame and the iron lid part increases. Further, when the cylindrical body is provided on the outer periphery of the fixing bolt and the elastic supporting member, the fixing bolt, the elastic supporting member itself and the outer periphery which originally have a supporting function are hardened in the cylindrical body. The resin mortar is solidified and held in a columnar shape, is not easily deteriorated and collapsed, and the support strength of the lid receiving frame and the iron lid portion is further increased.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes an assembled manhole for sewage, which is generally called a pre-hole, built under the road, and a lower part of the manhole 1, for example, a sewage pipe (not shown) penetrates and is connected thereto. When constructing the manhole 1, the height from the road surface is first checked and installed.

In the manhole 1, various concrete blocks are sequentially stacked on a foundation fixed with a foundation pile, a grit stone or the like, and an epoxy resin impregnated body or the like is disposed at each joint portion to bond and prevent slippage. Installed. An adjusting ring 3 selected according to the road surface height of the road is stacked on the upper side of the sloping wall block 2.
Socket bolts (not shown) that match the height of
Install the adjustment ring 3. A fixing bolt 4 is screwed into a lower end of the socket bolt, and the tapered coil spring 5 and the washer 6 are inserted into the fixing bolt 4 and then the lid receiving frame 7 is inserted into the socket bolt. A nut 9 is screwed onto the fixing bolt 4 from above the lid receiving frame 7 via a washer 8. By tightening the nut 9, the height of the lid receiving frame 7 is adjusted to the road surface height while elastically deforming the tapered coil spring 5. As shown in the drawing, the gap is adjusted obliquely at a high position H and a low position h.

The cover receiving frame 7 is provided with a cover fitting hole 10 and four air vent holes 11 and 6 as shown in FIG.
In this embodiment, three bolt holes 12 are used to insert the fixing bolts 4 into the three bolt holes 12, and the other three bolt holes 12 are used as air vent holes. I am trying to do it. Further, at the lower part of the inner peripheral surface of the lid receiving frame 7, projections 13 for preventing displacement of the inner frame are integrally formed at three or four places in the circumferential direction. Then, along the outer peripheral surface and the inner peripheral surface of the adjustment ring 3 and the lid receiving frame 7, a flexible outer mold (urethane belt) 14 and a metal inner mold (aluminum).
16 are arranged. The flexible outer mold 14 is fixed at its lower end to the adjusting ring 3 by a tightening band 15 having a fastener 15a for packing, and the metal inner mold 16 is fixed to the adjusting ring 3 and the lid receiving frame 7. Along the inner peripheral surface, the protrusion is prevented by the protrusion 13 for preventing displacement of the inner frame, and is fixed by an appropriate means.

[0010] Then, a portion corresponding to the high position H of the gap of the flexible outer frame 14 is bent outward, a funnel 17 is inserted into the portion, and the ultra-high-speed curing is performed in a few hours from the mortar container 18a. High Semecon 18, which is a mortar, is injected and filled. At the time of injection of the high semecon 18, the high semecon 18 flows naturally from the high position H to the low position h by injecting from the portion corresponding to the high position H of the gap, and the four air vent holes 11 and the three bolts While the air in the gap is being evacuated from the hole 12, the entire gap is uniformly filled, and when the funnel 17 is withdrawn, the flexible outer mold 14 returns to its original state. After the high-semecon 18 has hardened, the flexible outer formwork 14 and the metal inner formwork 16 are removed, the outside is buried by flattening the roadbed material, etc., the inside is finish-finished, and an iron cover is placed on the lid receiving frame 7. Fit. Then, the outer peripheral portion of the lid receiving frame 7 is paved together with the pavement of the road to complete all the work and release the traffic on the road. FIG. 6 shows a series of these work steps.

Instead of the urethane belt of the flexible outer frame 14 of the first embodiment, an annular flexible rubber belt 14a may be used and fastened to the outer peripheral surfaces of the adjusting ring 3 and the lid receiving frame 7. (In this case, the tightening band 15 is not required.) Further, instead of the metal inner frame (made of aluminum) 16, a flexible rubber inner frame 19 may be used as shown in FIG. Good thing. Also in this second embodiment, the manhole construction work is performed in the same manner as in the first embodiment, so that the description of the work process is omitted, but in the second embodiment, the flexible rubber The mold 19 is left unremoved even after the high-semecon 18 has hardened, so as to provide a finished surface. Therefore, the inner surface finishing treatment is not performed after the high-semecon 18 is cured.

In the second embodiment, the inner peripheral surface of the flexible rubber inner mold frame 19 is left as a finished surface without being removed even after the high-semecon 18 is cured. That is, a yellow reflection line 20 made of a fluorescent material is provided in a portion to be an inner peripheral surface of the entrance of the manhole 1. Then, after the manhole is completed, when the worker enters the manhole and works, the yellow reflection line 20 is reflected on the inner peripheral surface of the entrance and exit, and it is possible to draw the attention of the worker and enter and exit safely. become able to do. The flexible rubber inner mold frame 19 prevents the cured high semecon 18 from falling into the manhole 1.

In the manhole 1 as in the first and second embodiments, after the completion of the manhole, the cover receiving frame 7 and the iron cover are attached to the one-square c
A load of 150 to 400 kg per m is applied.
Since there is a possibility that the portion 8 deteriorates and the lid receiving frame 7 and the iron lid portion become lower than the road surface, the present invention takes measures to reinforce it. That is, as shown in FIG. 3, the outer peripheral portions of the fixing bolt 4 and the tapered coil spring 5 have a height in contact with the adjustment ring 3 and the lid receiving frame 7, and with the height adjustment of the lid receiving frame 7. A compression deformable cylinder 21 is provided,
The cylindrical body 21 is filled with a resin mortar 22 or the like which cures in two to three hours. The material of the cylinder 21 is
Any of a metal tube, a mesh tube, a synthetic resin tube, etc. may be used, and the shape may be any of a cylinder and a square tube.

The cylindrical body 21 is installed on the outer periphery of the fixing bolt 4 and the tapered coil spring 5 before the lid receiving frame 7 is inserted into the fixing bolt 4 and at the same time when the cylindrical body 21 is installed, the resin is placed in the cylindrical body 21. Mortar 22 and the like are filled in advance (Fig. 3
(State of (a)). Then, the nut 9 is screwed into the fixing bolt 4 through the lid receiving frame 7 and the washer 8 through the fixing bolt 4, and the height is adjusted by tightening the nut 9. Then
The cylinder 21 is compressed to the state shown in FIG. 3B, and the resin mortar 22 is also deformed along with the compression, and a part thereof is discharged out of the cylinder 21. In this state, the high semecon 18 is injected and filled by the same means as in the first and second embodiments. Then, after a predetermined time, the resin mortar 22 and the high-semecon 18 are hardened.

The cylindrical body 21 is not limited to being installed on the outer periphery of the fixing bolt 4 and the tapered coil spring 5, but may be provided at an arbitrary position between the adjustment ring 3 and the lid receiving frame 7. Further, the tapered coil spring 5 may be provided not only at the position of the fixing bolt 4 but also at any position between the adjustment ring 3 and the lid receiving frame 7. Since the resin mortar 22 cured in the cylindrical body 21 is protected in the outer periphery by the cylindrical body 21 and held in a columnar shape, even if the high semecon 18 or the like is deteriorated and collapsed by the load from the road surface, The lid receiving frame 7 and the iron lid portion are supported with great strength without being easily collapsed. In particular, when the cylindrical body 21 is provided on the outer periphery of the fixing bolt 4 and the elastic support member 5, the fixing bolt 4, the elastic support member 5 itself having the original support function, and the outer periphery thereof, It is hardened by the resin mortar 22 hardened in the cylindrical body 21 and is held in a columnar shape, so that it is not easily deteriorated.

In each of the above embodiments, the case where the tapered coil spring 5 is used as the elastic support has been described. Instead of the tapered coil spring 5, FIGS.
The one shown in (e) may be used. That is, (a) shows a trapezoidal leaf spring 23 made of a steel plate, which has a bolt insertion hole 23a inserted through the fixing bolt 4, and similarly, a semicircular leaf spring 24 having a bolt insertion hole 24a,
A parallelogram leaf spring 25 having a bolt insertion hole 25a,
A two-fold plate spring 26 having a bolt insertion hole 26a, a rubber body 27 having a bolt insertion hole 27a, and the like can be used.

[0017]

As described above, according to the manhole cover height adjusting method of the present invention, the following effects can be obtained. Between the upper concrete block and the lid receiving frame, a cylinder that has a height in contact with the upper concrete block and the lid frame, and is provided with a compressible deformable cylinder along with the height adjustment of the lid receiving frame,
Since the cylindrical body is filled with a resin mortar or the like which cures in a predetermined time, even if the mortar between the upper concrete block and the lid receiving frame is deteriorated and collapsed by the load from the road surface, Since the resin mortar hardened in the body is protected in its outer periphery by a cylindrical body and is maintained in a columnar shape, the mortar does not easily collapse and the support strength of the lid receiving frame and the lid portion can be increased. Further, since the cylindrical body is provided so as to be located on the outer periphery of the fixing bolt and the elastic support member, the fixing bolt having the function of originally supporting the lid receiving frame and the elastic support member itself have the outer periphery thereof. Since it is solidified by the resin mortar hardened in the cylinder and held in a columnar shape, it does not easily collapse under a load from above, and the support strength of the lid receiving frame and the lid portion can be further increased.

[Brief description of the drawings]

FIG. 1 is a partial sectional side view of an embodiment of a manhole cover height adjusting method according to the present invention.

FIG. 2 is a partial sectional side view of another embodiment of the manhole cover height adjusting method of the present invention.

FIGS. 3A and 3B are side sectional views of a main part of the present invention.

4A to 4E are perspective views of different elastic supporting members.

FIG. 5 is a plan view of a lid receiving frame portion.

FIG. 6 is a work process diagram of the present invention.

FIG. 7 is a partial side sectional view of a conventional example.

FIG. 8 is a side sectional view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Manhole 2 Sloping wall block 3 Adjusting ring 4 Fixing bolt 5 Taper coil spring 6,8 Washer 7 Lid receiving frame 9 Nut 10 Lid fitting hole 11 Air vent hole 12 Bolt hole 13 Inner frame displacement prevention projection 14 Flexible outer die Frame (urethane belt) 14a Flexible rubber belt 15 Tightening band 15a Tightening bracket 16 Metal inner frame (aluminum) 17 Filter funnel 18 High-semecon (ultra-high-speed curing mortar) 18a
Mortar container 19 Flexible rubber inner frame 20 Yellow reflection line (fluorescent material) 21 Cylindrical body 22 Ultra-high-speed curing resin mortar 23 Trapezoidal leaf spring 23a Bolt insertion hole 24 Semicircular leaf spring 24a Bolt insertion hole 25 Parallel four sides Shape leaf spring 25a Bolt insertion hole 26 Two-fold leaf spring 26a Bolt insertion hole 27 Rubber body 27a Bolt insertion hole

Claims (2)

(57) [Claims] In a manhole cover height adjusting method for adjusting the height of a cover when a manhole is constructed under a road, a fixing bolt is erected from an upper concrete block of the manhole. Is inserted into the lid receiving frame, a nut is screwed from above the lid receiving frame, an elastic supporting material is interposed between the upper concrete block and the lid receiving frame, and the nut is tightened or loosened to elastically deform the elastic supporting material. Adjust the lid receiving frame up and down to make it face-to-face with the road surface, dispose the outer formwork and the inner formwork along the outer peripheral surface and inner peripheral surface of the upper concrete block and the lid receiving frame. Filling the mortar or the like into the height adjustment gap and allowing it to harden, and between the upper concrete block and the lid receiving frame, the upper concrete block and the lid receiving frame And a compression-deformable cylinder is provided along with the height adjustment of the lid receiving frame, and the cylinder is filled with a resin mortar or the like which cures in a predetermined time. Manhole cover height adjustment method. 2. The manhole cover height adjusting method according to claim 1, wherein the cylindrical body is provided on the outer periphery of the fixing bolt and the elastic support member.