JP2006112075A - Manhole and installation method of manhole cover supporting frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the reuse of an adjusting ring and prevent the intrusion of rainwater into a manhole, by enabling a manhole cover supporting frame to be easily and rapidly removed. <P>SOLUTION: A relatively thick foamed-resin ring 10 is installed on the canted wall 3 of the manhole, and a required number of adjusting rings 4 made of concrete are installed on the ring 10 in accordance with the thickness of pavement. A thin foamed-resin ring 11 for finely adjusting height is installed on the rings 4; a pavement surface 5 and the manhole cover supporting frame 6 are fixed by being finely adjusted in such a manner as to be flush with each other; and an outer periphery of the adjusting ring 4 and outer peripheries of the rings 10 and 11 are enclosed with a water sealing tape 7, so that a gap between height adjusting members can be water-sealed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a manhole constructed by a manhole installation method and method for adjusting a manhole cover height that matches a paved road surface and a manhole cover surface.

  If the manhole cover surface protrudes from the road surface due to the sinking of the paved road surface, or if the manhole cover surface is depressed, it will be an obstacle that impacts the automobile traveling on the road. It must be installed exactly on the same plane.

  Conventionally, as shown in FIG. 4, rough height adjustment (large adjustment) of the manhole cover receiving frame 6 installed on the manhole inclined wall 3 is performed with an adjustment ring 4 made of concrete or synthetic resin having an appropriate thickness. The fine adjustment is performed by the flow mortar 41 or the adjustment plate made of a thin iron plate so that the road surface 5 and the manhole iron lid 61 are in the same plane.

  In the construction of new roads, even if the roadbed is carefully compacted, it is inevitable that the roadbed will sink due to the weight of the passing vehicle or impact while the road is open, and the manhole cover will It will be in the state which protruded from the road surface. Therefore, smooth traffic cannot be maintained unless the manhole cover height is adjusted after a certain period of time has elapsed since the traffic was opened, for example, six months later.

  This means that the weight of the passing vehicle is used for the rolling of the paved roadbed, but the original pavement can be regarded as a temporary pavement of about 6 months. It can be said to be paved.

  At the time of the main paving, the manhole cover frame that was originally installed becomes an obstacle to the paving work, and the compaction using a large machine cannot be performed. 3 (Patent No. 2623490, Patent No. 2623491, and Patent No. 2623492), the manhole cover receiving frame is removed in advance and the manhole opening is closed with a temporary lid or the like for efficient paving. was suggested.

On the other hand, if the manhole cover frame is installed after the pavement is completed, it will be filled with a material different from the pavement material around it, so there are joints of different materials, so cracks are likely to occur, and rainwater on the road surface Therefore, countermeasures have been taken as disclosed in Patent Documents 4 and 5.
As shown in FIG. 5 as an example, a sealing material was embedded in the adjustment mortar to prevent rainwater from entering the manhole.
Japanese Patent No. 2623490 Japanese Patent No. 2623491 Japanese Patent No. 2623492 JP 2002-364010 A Japanese Patent Laid-Open No. 11-93190

  Since the pavement is redone when the roadbed has settled down sufficiently due to the weight of the vehicle after the traffic is released, the installation of the manhole cover support frame will also be a temporary installation for about half a year, but in order to pass the vehicle safely over the manhole It is necessary to perform the construction in the same way as the main construction so as to have the same strength as the main construction.

The adjustment ring made of concrete or resin used for the temporary installation and the fluid mortar used for fine adjustment of the height are firmly bonded, and the adjustment ring may be damaged at the time of removal.
In addition, when the height is finely adjusted with an iron adjustment plate, brick, or the like, the manhole cover receiving frame and the adjustment ring are point-supported, so that the concrete adjustment ring is damaged due to stress concentration. Even if the adjustment ring can be removed without damaging it, the mortar for fine adjustment of the height is attached, and in order to reuse it for this installation, it is necessary to perform a cleansing work to scrape off the attached mortar. Since it takes time and effort, new manhole cover frames are often used, which is costly and wasteful of resources.

  Therefore, the mortar for fine adjustment of the height does not adhere to the adjustment ring and the manhole cover receiving frame, and the manhole cover receiving frame can be easily and quickly removed during the pavement construction, and the adjustment ring is In order to make it reusable, to facilitate the paving work, to shorten the construction period, and to efficiently use resources, the elastic material ring 1 made of foamed resin as shown in FIG. Japanese Patent Application No. 2004-217892 has been proposed which solves the above-mentioned problems by using the height adjustment of 6 and facilitates the reuse of the adjustment ring 4.

However, as described above, there is a possibility that rainwater on the road surface may enter the manhole from cracks in the pavement or gaps generated at the joint. In order to prevent this rainwater from entering, if the water stop means is provided between the adjustment mortar part and the ring described above, it takes time and cost, and it is difficult to reuse the adjustment ring.
Accordingly, the present invention is to adjust the height by installing an elastic material ring or an adjustment ring so that the water can be stopped by simple construction before filling around the manhole cover receiving frame.

By providing water stop means on the outer periphery of the height adjusting member including the manhole cover receiving frame and the ring made of an elastic material, rainwater is prevented from entering the manhole.
Specifically, the outer periphery of the manhole cover receiving frame is water-stopped by applying a water-stopping tape, a swellable paint, and a peelable caulking material.

EXAMPLE An elastic ring 1 matched with the inner and outer diameters of the manhole shown in FIG. 3 is prepared in accordance with the adjustment height by forming a long hole 2 for inserting a bolt at the fixing bolt position of the manhole cover receiving frame.
A foamed resin ring 10 having a required thickness is installed on the manhole inclined wall 3 as shown in FIG. 1, and a necessary number of concrete adjustment rings 4 are installed on the manhole inclined wall 3 in accordance with the pavement thickness. Furthermore, in order to make the height of the manhole cover receiving frame 6 coincide with the road surface, a thin foamed resin ring 11 for fine height adjustment is installed, and the paved road surface 5 and the manhole cover receiving frame 6 are fixed as the same surface.

Then, in order to stop the gap between the flange of the manhole cover receiving frame 6, the adjustment ring 4, and the foamed resin rings 10 and 11, a waterproof tape 7 is wound, the repair material 51 is filled around the manhole cover receiving frame 6, Press to complete.
It is not necessary to always install the foamed resin ring 1 on the upper and lower surfaces of the adjustment ring 4, and the height of the manhole cover receiving frame 6 can be adjusted by installing the foamed resin ring in a portion in contact with the manhole cover receiving frame 6.

  In addition to the water-stopping tape, the water-stopping tape is formed by applying a water-stopping caulking material mainly composed of a modified silicone, which can be easily peeled off after use, to a gap of about 2 to 5 mm. Since the modified silicone has good releasability, it can be easily removed at the time of removal during the main paving, and the reuse of the adjusting ring 4 is not hindered.

  Further, a water-swellable coating composition comprising an ionizable water-absorbing polymer such as carboxymethyl cellulose, a polyvalent metal compound, an organic solvent of a thermoplastic elastomer, and an extender pigment is applied to the outer periphery of the height adjusting member with a roller brush or the like at about 2 mm By applying to the thickness, even if rainwater enters, the swellable paint swells and water stops completely, and there is no risk of rainwater entering the manhole. This swellable paint is only thinly applied to the outer periphery of the adjustment ring 4 and the foamed resin rings 10 and 11 and does not have strong adhesiveness like cement mortar. It does not hinder use.

In addition, this swellable paint that has been previously molded into a string or tape has a certain degree of adhesiveness and can be easily wrapped around the outer periphery of the height adjustment member, thus simplifying the water stop operation. Can be
In addition, you may use what applied the thin swellable coating material to the surface and outer periphery of the foamed resin ring, or provided the water stop layer of the thin rubber.

  By using a ring made of an elastic material for adjusting the height of the manhole cover frame, it is easy to remove the main pavement and prevent rainwater from entering the manhole. Since the mortar for adjustment is not used, the mortar is not attached to the flange or the adjustment ring of the manhole cover receiving frame and can be reused, so that the resources can be used efficiently.

Sectional drawing of the manhole of this invention. Sectional drawing of the manhole which uses an elastic material ring. The perspective view of an elastic material ring. Sectional drawing of the conventional manhole. Sectional drawing of the conventional manhole which gave the water stop means.

Explanation of symbols

1 Elastic ring (foamed resin ring)
10, 11 Foamed resin ring 3 Manhole inclined wall 4 Adjustment ring 5 Road surface 51 Repair material 6 Manhole cover receiving frame 7 Water stop means

Claims (7)

A manhole in which a ring made of an elastic material is installed on the lower side of the manhole cover receiving frame, and a water stop means is applied to the outer periphery of the height adjusting member. The manhole according to claim 1, wherein the water stopping means is a water stopping tape. The manhole according to claim 1, wherein the water stopping means is silicone caulking. 2. A manhole according to claim 1, wherein the water stopping means is a swellable paint. 5. The manhole according to claim 4, wherein the swelling paint is formed as a string or a tape. A height adjustment ring made of foamed resin, in which a water blocking layer is provided on at least one surface of the ring. A manhole installation method in which the height of the manhole cover receiving frame is adjusted to match the paved road surface, and then water is stopped on the outer periphery of the manhole cover receiving frame and the height adjusting member.

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