JPH05263431A - Cover height adjusting method for manhole - Google Patents

Abstract

PURPOSE:To adjust the cover height of a sewage built-up manhole in particular when the manhole is constructed under a road. CONSTITUTION:Fixing bolts 4 are erected from the upper concrete block of a manhole 1, the fixing bolts 4 are inserted into a cover receiving frame 7, nuts 9 are screwed from the upper side of the cover receiving frame 7, an elastic support material is inserted between the upper concrete block and cover receiving frame 7, the nuts 9 are fastened or loosened, and the cover receiving frame 7 is vertically adjusted to the road surface while the elastic support material is elastically deformed. An outer formwork 14 and an inner formwork 16 are arranged along the outer periphery and inner periphery of the upper concrete block and cover receiving frame 7, and mortar 18 is filled and hardened in the height adjusting gap between the upper concrete block and cover receiving frame 7. The outer formwork 14 is made of a flexible material, the flexible outer formwork 14 is deflected to the outside, and mortar is filled.

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 manhole cover when constructing a manhole under a road, and particularly to adjusting a manhole cover height for sewer assembly. It is related to the construction method suitable for.

[0002]

2. Description of the Related Art Conventionally, when building a manhole under a road,
The lid portion of the manhole needs to be vertically adjusted with respect to the inclination of the road surface, and various manhole lid height adjusting methods or adjusting devices have been proposed for this purpose. For example, the applicant of the present application has proposed a lid height adjusting construction method as shown in FIGS. 7 and 8. That is, this construction method is used when the manhole A is to be constructed under the road B, and the road surface is inclined by θ degrees with respect to the vertical line. Concrete blocks) are piled up.

A selected adjusting ring D is stacked on the upper side of the swash wall block C, and socket bolts E matching the height of the adjusting ring D are arranged at substantially equal intervals in the upper circumferential direction of the swash wall block C. Install in 3 places and install adjustment ring D. The fixing bolt F is screwed into the socket bolt E to stand upright, one taper coil spring G and one washer I are inserted into the fixing bolt F, and then the lid receiving frame H is inserted. 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 by elastically deforming the taper coil spring G by tightening the nut J. .. Then, the outer mold K and the inner mold 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 the super high speed is provided in the gap between the outer mold K and the inner mold L. The cured 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 lid N is fitted to the lid receiving frame H.

[0004]

In the above-mentioned conventional manhole cover height adjusting method, the height adjustment is a simple operation of elastically deforming the taper coil spring G by tightening the nut J, and steplessly about 50 mm. Can be finely adjusted, and it is effective in building a prefabricated manhole on a sloping ground. By the way, in the above construction method,
The outer mold K and the inner mold 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 the ultra-fast curing mortar is provided in the gap between the outer mold K and the inner mold L. Although M is filled and cured, the arrangement of the outer mold K and the inner mold L is troublesome, and the work of filling the ultra-fast curing mortar M is troublesome. The present invention has been made for the purpose of solving the above problems.

[0005]

In order to achieve the above object, the present invention provides a manhole cover height adjusting method for adjusting a height of a cover part when constructing a manhole under a road.
A fixing bolt is erected from the upper concrete block of the manhole, the fixing bolt is inserted into the lid receiving frame, a nut is screwed from the upper side of the lid receiving frame, and an elastic support material is interposed between the upper concrete block and the lid receiving frame. By tightening or loosening the nut, the lid support frame is adjusted up and down while elastically deforming the elastic support material to make it face-to-face with the road surface, and the outer formwork along the outer peripheral surface and the inner peripheral surface of the upper concrete block and the lid support frame. Also, an inner mold is provided, and a height adjusting gap between the upper concrete block and the lid receiving frame is filled with mortar or the like so as to be hardened, and the outer mold is formed of a flexible material. The flexible outer mold is bent outward to fill the mortar and the like, and the flexible outer mold is bent outward to fill the mortar and the like with the height adjustment gap. Height is high It is characterized by the fact that it is set to a new position.

[0006]

By the above means, the manhole cover height adjusting method of the present invention performs the following actions. An outer mold and an inner mold are arranged along the outer peripheral surface and the inner peripheral surface of the upper concrete block and the lid receiving frame, and the outer mold of them is formed of a flexible material. Since the mortar and the like are bent by being bent outward, the outer mold can be easily arranged, and the mortar and the like can be easily filled. In addition, since the position where the flexible outer mold is bent outward to fill the mortar etc. is set to the position where the height of the height adjusting gap is high, the mortar etc. to be filled naturally goes from high to low. And then fills all gaps evenly.

[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 is a sewage assembly manhole built under the road, which is commonly called a prehole, and a lower part of the manhole 1 has a sewer pipe (not shown) penetrating and connected thereto. When constructing the manhole 1, the height from the road surface is first checked and then installed.

In the manhole 1, various concrete blocks are sequentially stacked on a foundation piled with foundation piles and ground stones, and an epoxy resin impregnated body or the like is arranged at each joint to bond and prevent slippage. Installed. The adjustment ring 3 selected according to the height of the road surface is stacked on the upper side of the swash wall block 2.
Socket bolts (not shown) matching the height of the above are installed at three locations in the upper circumferential direction of the swash wall block 2 at substantially equal intervals,
Install the adjustment ring 3. A fixing bolt 4 is vertically installed by screwing a lower end portion of the socket bolt, and a taper coil spring 5 and a washer 6 are inserted into the fixing bolt 4 and then a lid receiving frame 7 is inserted. A nut 9 is screwed onto the fixing bolt 4 from the upper side of the lid receiving frame 7 via a washer 8, and by tightening the nut 9, the height of the lid receiving frame 7 is adjusted to the road surface height while elastically deforming the taper coil spring 5. Then, as shown in the drawing, the gap is adjusted obliquely to a high position H and a low position h.

The lid receiving frame 7 is provided with a lid fitting hole 10 and four air vent holes 11 and 6 as shown in FIG.
One bolt hole 12 is provided, and the fixing bolt 4 is inserted into three of the six bolt holes 12 in this embodiment, and the other three are used as air vent holes. I am trying to do it. Further, at the lower position of the inner peripheral surface of the lid receiving frame 7, inner mold deviation preventing projections 13 are integrally formed at 3 to 4 positions 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 frame (a polyolefin foam or a flexible rubber belt) is formed.
14 and an inner metal mold (made of aluminum) 16 are provided.
The flexible outer mold 14 is fastened to the adjustment ring 3 by a tightening band 15 having a tightening fitting 15a for packing at the lower end thereof, and the metal inner mold 16 is fixed to the adjustment ring 3 and the lid receiving frame 7. Along the inner peripheral surface, the inner frame is prevented from being displaced by the protrusion 13 for preventing displacement and is fixed by an appropriate means.

Then, the portion of the flexible outer frame 14 corresponding to the high position H of the gap is bent outward, the funnel 17 is inserted therein, and the mortar container 18a is hardened in 2 to 3 hours. Inject and fill high semecone 18 which is a mortar. At the time of injecting the high semecone 18, the high semecone 18 naturally flows from the high position H to the low position h by injecting from a portion corresponding to the high position H of the gap, and the four air vent holes 11 and the three bolts. The air in the gap is evacuated from the holes 12 to fill the entire gap evenly. When the funnel 17 is pulled out, the flexible outer frame 14 returns to its original state. After the high semecone 18 is hardened, the flexible outer mold 14 and the metal inner mold 16 are removed, the outer side is backfilled by laying the roadbed material, and the inner side is subjected to an inner surface finishing treatment, and an iron lid is attached to the lid receiving frame 7. Fit in. 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. A series of these work steps is shown in FIG.

In place of the polyolefin foam or the flexible rubber belt of the flexible outer frame 14 of the first embodiment, an annular flexible rubber belt 14a is used, and the outer periphery of the adjusting ring 3 and the lid receiving frame 7 is changed. The surface may be tightened (in this case, the tightening band 15 is unnecessary), and
Instead of the metal inner mold 16 (made of aluminum), a flexible rubber inner mold 19 may be used as shown in FIG. In this second embodiment as well, the manhole building work is performed in the same manner as in the first embodiment, so a description of its work process will be omitted, but in this second embodiment, in the flexible rubber The mold frame 19 is left as a finished surface without being removed even after the high semecone 18 is cured. Therefore, the inner surface finishing process is not performed after the high semecone 18 is cured.

Further, in the second embodiment, since the flexible rubber inner mold frame 19 is left as a finished surface without being removed even after the high semecone 18 is cured, the inner peripheral surface of the flexible rubber inner mold frame 19 is removed. That is, the yellow reflection line 20 made of a fluorescent material is provided on the inner peripheral surface of the entrance / exit of the manhole 1. After the manhole is completed, when the worker enters into the manhole and works, the yellow reflection line 20 is reflected on the inner peripheral surface of the entrance and exit, so that the worker can be alerted and safely enter and exit. become able to do. In addition, the flexible rubber inner frame 19 prevents the cured high semecone 18 from collapsing.

In the manhole 1 as in the first and second embodiments, after the manhole is completed, the lid receiving frame 7 and the iron lid are covered with 150 per 1 cm 2 by a vehicle passing through the road.
Since a load of up to 400 kg is applied, and for a long period of time, due to the large load, vibration, etc., the part of the high semecone 18 may deteriorate and collapse, and the lid receiving frame 7 and the iron lid part may become lower than the road surface. In the present invention, the reinforcing measure is taken. That is, as shown in FIG. 3, the fixing bolts 4 and the taper coil springs 5 have a height on their outer peripheral portions in contact with the adjusting ring 3 and the lid receiving frame 7, and the height of the lid receiving frame 7 is adjusted. A cylindrical body 21 that can be deformed by compression is provided, and the cylindrical body 21 is filled with a resin mortar 22 that cures in 2 to 3 hours. The material of the cylindrical body 21 may be any of a metal cylinder, a mesh cylinder, a synthetic resin cylinder, and the shape is
Either a cylinder or a square tube may be used.

When the cylindrical body 21 is installed on the outer peripheral portions of the fixing bolt 4 and the taper coil spring 5, before the lid receiving frame 7 is inserted into the fixing bolt 4, the cylindrical body 21 is provided with a resin at the same time when the cylindrical body 21 is installed. Mortar 22 etc. are filled (Fig. 3
(State of (a)). Then, the lid receiving frame 7 is inserted into the fixing bolt 4, the nut 9 is screwed into the fixing bolt 4 via the washer 8, and the height is adjusted by tightening the nut 9. Then,
The cylindrical body 21 is compressed to the state shown in FIG. 3B, the resin mortar 22 is also deformed accordingly, and a part thereof is discharged to the outside of the cylindrical body 21. In this state, the high semecone 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 semecone 18 are cured.

The cylindrical body 21 is not limited to being installed on the outer peripheral portions of the fixing bolt 4 and the taper coil spring 5, but may be provided at any position between the adjusting ring 3 and the lid receiving frame 7. Further, the taper coil spring 5 may be provided not only at the position of the fixing bolt 4 but also at any position between the adjusting ring 3 and the lid receiving frame 7. The resin mortar 22 cured in the tubular body 21 is protected in its outer periphery by the tubular body 21 and is held in a columnar shape. Therefore, the high semicon 18 and the like may be deteriorated and collapsed due to load and vibration from the road surface. Does not easily collapse, and the lid receiving frame 7
And, the iron lid part is supported with great strength. In particular, the cylinder 21
When the fixing bolt 4 and the elastic support member 5 are provided on the outer circumference, the fixing bolt 4, the elastic support material 5 itself and the outer circumference thereof, which originally have a supporting function, are provided inside the tubular body 21. It is hardened by the hardened resin mortar 22 and held in a columnar shape, so that it is not easily deteriorated.

In each of the above-described embodiments, the case where the taper coil spring 5 is used as the elastic support has been described, but instead of the taper coil spring 5, FIGS.
The one shown in (e) may be used. That is, (a) is a trapezoidal leaf spring 23 made of a steel plate having a bolt insertion hole 23a for inserting the fixing bolt 4, and similarly, a semi-circular leaf spring 24 having a bolt insertion hole 24a,
A parallelogram shaped leaf spring 25 having a bolt insertion hole 25a,
A half-folded leaf 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, the manhole cover height adjusting method of the present invention has the following effects. An outer mold and an inner mold are arranged along the outer peripheral surface and the inner peripheral surface of the upper concrete block and the lid receiving frame, and the outer mold of them is formed of a flexible material. Since it is designed to be bent outward to fill mortar and the like, the outer formwork can be easily arranged, and the work of filling mortar and the like can be facilitated, and the work time can be shortened and the manhole installation cost is low. Can be In addition, since the position where the flexible outer mold is bent outward to fill the mortar etc. is set to the position where the height of the height adjusting gap is high, the mortar etc. to be filled naturally goes from high to low. The entire gap can be filled with mortar smoothly and evenly.

[Brief description of drawings]

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

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

3 (a) and 3 (b) 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 chart 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]

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 Venting Hole 12 Bolt Hole 13 Inner Mold Frame Preventing Protrusion 14 Flexible Outer Mold Frame (polyolefin foam or flexible rubber belt) 14a Flexible rubber belt 15 Tightening band 15a Tightening metal fitting 16 Metal mold (aluminum) 17 Funnel 18 High semecone (ultrafast hardening mortar) 18a
Mortar container 19 Flexible rubber inner frame 20 Yellow reflection line (fluorescent material) 21 Cylindrical body 22 Super fast curing resin mortar 23 Trapezoidal leaf spring 23a Bolt insertion hole 24 Semicircular leaf spring 24a Bolt insertion hole 25 Parallel four sides Shaped leaf spring 25a Bolt insertion hole 26 Half-folded leaf spring 26a Bolt insertion hole 27 Rubber body 27a Bolt insertion hole

Claims (2)

[Claims] 1. In a manhole cover height adjusting method for adjusting a height of a cover part when constructing a manhole under a road, a fixing bolt is erected from an upper concrete block of the manhole and the fixing bolt is installed. Through the lid receiving frame, screw the nut from the upper side of the lid receiving frame, insert an elastic support material between the upper concrete block and the lid receiving frame, and tighten or loosen the nut to elastically deform the elastic support material. While adjusting the lid receiving frame up and down to match the road surface, arrange the outer and inner molds along the outer and inner peripheral surfaces of the upper concrete block and the lid receiving frame, and The height adjusting gap is filled with mortar or the like so as to be cured, and the outer mold is made of a flexible material, and the flexible outer mold is bent outward to fill the mortar or the like. Lid height adjustment method of the manhole being characterized in that so as to. 2. The position where the height of the height adjusting gap is high is set at a position where the flexible outer frame is bent outward to fill the mortar and the like. Manhole cover height adjustment method.