JP2003213712A - Repair method for existing public concrete catch basin or the like and its member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To rationalize the repair work for a public concrete catch basin. <P>SOLUTION: When an existing public catch basin 1 having a service life of approximately 50 years is degraded due to cracking of its lid for instance, then its lid and edge frame are removed, an underframe 10 attached with a sealed inner lid 9 is placed on an remaining side wall 4, a protective iron lid 2 is placed flush with the ground surface GL for protecting sealed inner lid 9 on the underframe 10, then a partial repair can be performed and the cost, period or the like of construction can be rationalized. Moreover, water immersion to the public catch basin 1 and the leakage of sewage smell from the catch basin can be prevented. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an existing concrete
The present invention relates to a method of repairing a small-diameter manhole made of grate or an existing concrete-made masu and its members, and further to a closed inner lid of a new concrete-made masu.

[0002]

2. Description of the Related Art Generally, the installed sewer pipe has a standard service life of 50 years (the service life of the lid is 18 years).
It is said that there is a tendency that the number of items that have deteriorated over the years, those that have been damaged by vibrations and loads due to the rapidly increasing number of passing vehicles, and those that have been corroded due to the discharge of malicious sewage.

Therefore, a repairing method is used as one of the methods for rehabilitating such a defective sewer pipe.

For example, in sewer mains, repairing methods such as cracks in pipes, poor gradients, joints, etc., in manholes made of concrete, replacement of iron frames, lids, and foot fittings, walls, inverts, etc. A repairing method, and further, a repairing method such as replacement of a concrete product is publicly known.

Since the repairing method basically does not employ the open-cutting method, the cost and time can be saved, and adjustment with other buried objects such as water, gas and electricity can be omitted.

In addition, it has the advantages that it does not occupy the road during the construction period and the amount of soil and waste generated from the construction is small.

By the way, as the repairing method for the concrete-made manhole, a reversing method (a method of inserting a lining member into an existing manhole by reversing and hardening it with a hot water shower and integrating it with an inner wall) and , Forming method (Installing a mold that has been molded into the inner wall of the manhole in the existing manhole, and filling the special resin into the space between the mold and the inner wall of the manhole to cure it. Method to integrate with, for example, Japanese Patent Publication 7-1
No. 8189), and a lining method (a method of applying resin with a spray gun or the like after adjusting the unevenness caused by corrosion of the inner wall of the manhole with mortar or the like).

[0008] On the other hand, in the concrete masu repair method, the concrete product is replaced as described above.

That is, a publicly made concrete public slab 1A shown in FIG. 3 has an edge block in which a cover 2A made of cast iron or a reinforced concrete is sealed from above to be flush with the ground surface GL. It is composed of (curb block) 3A, side block (straight wall block) 4A for adjusting the burial depth, and bottom block (invert block) 6 on which the invert 5 is formed. It is constructed on a leveled and well-compacted foundation 7 made of rubble or crushed stone so that it does not sink.

At least one inflow pipe (not shown) and a sewer main (not shown) in the house are provided in this public mast 1A.
The mounting pipe 8 (made of vinyl chloride) connected to is associated.

[0011] In such a public masu 1A, it may be buried under a road, and if there is damage such as cracks in the lid 2A due to a drastic increase in the load of passing vehicles, a repairing method is used to replace it. .

[0012] In addition, this concrete made public (1
Regarding the repairing method A), the following proposals have been introduced (see Japanese Patent Laid-Open No. 2001-182144).

This proposal is based on the above-mentioned concrete man-made.
It seems that it is similar to the forming method, which is one of the repairing methods of the building, but it is a new PVC public building that is considerably smaller than this public building (1A) in the existing concrete public building (1A). Put in the existing concrete public (1
In addition to mounting on the invert of A), the outflow / inlet of the new PVC public mast is fitted in the outflow / inlet of the joint part, and the inspection pipe of the new PVC public mast is already installed. The concrete block made of concrete (1A) is made lower than a part of the side block (or at least the edge block) (4A), the inner tube is put on the inspection tube, and the space between the side block and the inspection tube. We are proposing a repair method for existing concrete-made public masu (1A), which is to inject mortar into.

[0014] According to this proposal, the existing concrete-made public mast is not dug up, and furthermore, since each connecting portion of the public masu is not repaired in a buried state, the existing concrete as a whole is not repaired. It is said that the repair of public masu made by G can be done easily.

[0015]

However, in the repair method of the general concrete public masu 1A explained with reference to FIG. 3, if the cracked lid 2A is replaced, the edge block 3A naturally suffers wear. Combined with this, the new lid does not seal well, there is leakage of sewage odor and infiltration water, even if the curb is newly made and this is covered with a new lid, Since it is difficult to construct a closed lid (incompletely closed), there is a problem that leakage of sewage odor and infiltration of rainwater cannot be completely prevented.

In addition, even if the standard service life is not 50 years, in order to connect the new edge block to the old existing side block 4A, it is uncomfortable (for example, a small joint area).
Eccentric support) occurs, and it is not easy to manually handle a heavier new curb, and thus a simple repairing method is not achieved.

On the other hand, the concrete described in the above proposal
The following problems are conceivable in the repair method of Tohoku Masu (1A).

Existing concrete made public (1A)
In order to put a new PVC public truss inside, this new PVC public trout is fitted with an invert member, an inflow side connecting body,
Disassembling into the connection body on the outflow side and the inspection tube (rising pipe), assembling and bonding these inside the existing concrete public mask (1A), it becomes the work of the existing concrete public mask (1A). If the inner diameter is 450 mmφ, the depth (from the surface of the earth to the bottom of the outlet) is 1200 mm (standard size in Tokyo), which makes the work extremely troublesome.

The proposed repairing method is applied to an existing concrete-made public masu (1A) for aged public masu whose standard service life is 50 years, and has a standard service life of 18 years. Since it is not a repair for the above, it is uneconomical to repair only the upper member such as the lid and cannot be adopted.

Therefore, the present invention is to change the idea of various problems in the above-mentioned general existing concrete-made public masu repair method and the proposed concrete-made public masu repair method. The main purpose is to solve the problems, and the secondary purpose is to make up for the deficiency in the new general public concrete masks.

[0021]

[Means for Solving the Problems] In order to achieve such an object, the gist of the present invention is to: 1) provide a pedestal that is prevented from sinking with a closed inner lid for a manhole or a hall. A sewage equipment member, which is approximately flush with the ground surface and has an openable / closable protective lid for protecting the closed inner lid, and 2) a concrete-made side that prevents subsidence. A pedestal is placed on the mass, and a closed inner lid is provided on the pedestal, and a protective iron lid that is substantially flush with the ground surface and protects the closed inner lid is placed. 3) If the upper member of the existing concrete public masu or concrete small-diameter manhole becomes defective, after removing the upper member, Place a pedestal with a sealed inner lid on the remaining side block, Protect sealed lid, and existing concrete, characterized by placing a protective iron lid for the ground surface substantially flush - in DOO made public masu repairing such method.

[0022]

The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 is a schematic vertical sectional view of a repairing public mast of the first embodiment to which the repairing method of the present invention is applied, and FIG. 2 is a schematic vertical sectional view of a repairing public mast of the second embodiment. The same or common parts as those of FIG. 3 showing the conventional example are designated by the same reference numerals, and the description thereof will be omitted or simplified.

The repair 1 of the existing concrete public slab 1A of this embodiment has an inner diameter (or inner width) of 300 mm.
The above circle (or square) is used, and the depth of the masu is, for example, 600 mm when the inner diameter is 300 mmφ and the number of confluences is 3
Or up to 1200 mm when the inner diameter (inner width) is 450 mmφ and the number of merging lines is up to 5, and it is suitable for being buried near the boundary between the residential land and the road, especially on the road. It is also convenient where static loads are applied.

Such existing concrete public masu 1A
As mentioned above, the standard service life is 50 years, but the standard service life of the lid (2A) is 18 years, which is considerably shorter than that, and further, a drastic increase in vehicles and ground subsidence and Since the upper member of the road is quickly deteriorated due to deterioration and damage due to replacement of the pavement of the road, in order to partially repair the defective portion, the embodiment of the present invention is based on the existing concrete public facilities. The lid (2A) and the edge block (one of the upper members) (3A) in 1A are removed, and the pedestal 10 as a sink preventive body with a new closed inner lid 9 is placed on the remaining existing side block 4. After simply placing it on the pedestal 10, the ground surface GL
A protective iron lid (protective lid) 2 which is substantially flush with the openable and closable is placed to protect the inner lid 9.

According to this repairing method, the existing concrete
The members other than the upper members such as the curb block (3A) and lid (2A) in the public masu (house hall) 1A are not defective, and are within the standard service life, and can be used as they are. Not only can various general advantages of the construction method be exhibited, but the inner lid 9 of the pedestal 10 can be used for public use.
Can be completely sealed, and leakage of sewage odor and infiltration of rainwater can be prevented. Of course, the pedestal 10 and the side blocks 4 are hardened with asphalt or the like to eliminate the gap.

In addition, the base 10 is made of recycled plastic (P
E, PP) not only makes it lighter and easier to handle, but it can be fitted to any existing side blocks 4 without any difficulty, rather than being simply placed, and thus the overall workability can be improved. It can be improved especially.

Next, members used in the repairing method will be described in detail with reference to the embodiment shown in FIG.

First, the "pedestal 10" is a door.
Natsu-shaped plastic injection-molded product, its molding is very rough and does not cost the production cost, and it can be manufactured at very low cost in combination with recycled plastic material. The strength can be secured.

On the lower surface side of this pedestal 10, the existing side blocks 4
By forming a fitting portion 11 slightly larger than the outer diameter (outer dimension) of
The misalignment prevention edge 12 on the outside of the fitting portion 11 is formed to prevent misalignment of the paving work.

Inside the fitting portion 11 on the lower surface side, a reverse funnel-shaped inclined surface 14 is formed toward the donut-shaped inner peripheral surface 13 of the pedestal 10 so as to form meat meat and to be inspected. I try not to hinder the cleaning.

A housing portion 16 for housing the handle 15 of the inner lid 9 is formed on the upper surface side of the pedestal 10 so that the outward flange of the inner lid 9 can come into contact therewith. , It's also meat meat. Therefore, the weight of these meat slime and recycled plastic is further reduced. The outer peripheral shape of the pedestal 10 may be a square shape.

On the outer peripheral side of the upper surface side, the protective iron lid 2 is provided.
Foot fitting part 18 on which the flange-shaped foot 17 of
Is formed.

The inner diameter of the inner peripheral surface 13 is equal to the inner lid 9
The insertion portion 19 is configured to be substantially the same as the insertion portion 19 so that the inner lid 9 can be completely sealed when it is inserted.

The vertical dimension of the inner peripheral surface 13 is substantially the same as the axial length of the insertion portion 19 of the inner lid 9.

Next, the "inner lid 9", which is a plastic injection-molded product, has a short cylindrical insertion portion 1 on its lower surface.
9 is integrally formed in a pot shape, and a handle 15 is integrally formed on the upper surface thereof and an outward flange is integrally formed on the outer periphery thereof.

A seal ring (rubber ring) 20 is fitted on the insertion portion 19 so as to be completely sealed.

The inner lid 9 may be an inexpensive one that has been mass-produced as "cast iron inner lid ITO-R" manufactured by Aron Kasei Co., Ltd.

Next, the "protection iron lid 2" is made of ductile cast iron and can withstand the road surface load of a vehicle,
In addition, it can be easily opened by using a ball, etc., and it also prevents the lid from being stolen or dissipated. A cylindrical receiving frame 22 that is supported by the above, and a link hinge 23 that connects the iron lid 21 and the receiving frame 22 are roughly configured.

A ball hole 24 is opened in the portion of the iron lid 21 facing the link hinge 23 to facilitate the opening of the iron lid 21.

Further, the flange-shaped foot 17 is integrally provided at the lower end of the receiving frame 22, and is placed on the upper surface of the pedestal 10, and a flap is formed so as to be inscribed also on the inner peripheral surface 13. ing.

Therefore, the receiving frame 22 and the pedestal 10 are firmly integrated together with the concrete or asphalt pavement outside the receiving frame 22 and the pedestal 10 and are not displaced by the horizontal load.

As the protective iron lid 2, an inexpensive mass-produced "cast iron protective lid WPH20" manufactured by Aron Kasei Co., Ltd. can be used with some modifications.

Incidentally, for fixing the pedestal 10 and the receiving frame 22,
Preferably, bolting or a bayonet coupling mechanism is used.

Next, members in the second embodiment shown in FIG. 2 will be described in detail.

Since the parts common to those in FIG. 1 are omitted, they can be replenished as they are.

Insertion part 1 of inner peripheral surface 13 of pedestal 10 and inner lid 9
9, a short tube 26 made of plastic such as vinyl chloride with an outward flange 25 is interposed to improve the complete sealing of the inner lid 9 by precision fitting by injection molding or seal fitting. The production die of the pedestal 10 is roughened to make it inexpensive.

Therefore, the pedestal 10 may be made of concrete (of course, it may be made of plastic), and since the protective iron lid 2 and the concrete pedestal 10 are separated from each other, a conventional edge is used. It is lighter than the lump and is easy to handle.

The short pipe 26 is also called a guide pipe, and the outward flange 25 is sewn and fixed to the base 10 by a plurality of bolts 27 and the like.

Although the first and second embodiments have been described with reference to the existing concrete-made public housing 1A, the present invention is not limited to this, and the existing concrete-made small-diameter manhole is used. Not only can it be applied to No. 1 Manhole, but it can also be made of concrete or new concrete.
It can also be applied to public manufacturing.

[0051]

EFFECTS OF THE INVENTION According to the present invention, since the sunk-preventing pedestal is provided with a closed inner lid, it can be diverted to a slightly larger protective iron lid or pedestal, as well as a small-diameter PVC manhole or masu.
The closed inner lid is made common and general-purpose, and can be removed if unnecessary. Furthermore, it is a donut shape or a square frame shape on an existing or new concrete side block that prevents sinking. Since the pedestal is covered, an inner lid is provided inside the pedestal to seal the pedestal, and the upper portion thereof is covered with a protective iron lid, it is convenient for a partial repairing method of the upper member which is often deteriorated, and moreover,
Not only can sewage spills leak out and rainwater and other infiltration water can be completely prevented, but the pedestal is covered with a side block that prevents subsidence, so it is naturally hardened than the pedestal used for conventional PVC manholes. Not only can it be more strongly supported only on the existing side blocks, but it can be handled easily.

[Brief description of drawings]

FIG. 1 is a first embodiment of the present invention.

FIG. 2 is a second embodiment.

FIG. 3 is a conventional example.

[Explanation of symbols]

1 ... Repair Public Ms. 1A ... Public Ms. 2 ... Protective Iron Lid, 3
A ... Edge block, 4 ... Side block, 9 ... Inner lid, 10 ... Pedestal

Claims (3)

[Claims] 1. A cover which can be opened and closed and which is provided with a closed inner lid for a manhole or a meeting room and which is substantially flush with the ground surface and protects the closed inner lid on a pedestal which is prevented from sinking. A member for sewage equipment, characterized in that 2. A protection which mounts a pedestal on a concrete side block which is prevented from sinking, and which is provided with a closed inner lid and which is substantially flush with the ground surface and protects the closed inner lid. A concrete-made public featuring an iron lid. 3. A side block remaining after removing the upper member of an existing concrete public mast or concrete small-diameter manhole when the upper member becomes defective. A pedestal with a closed inner lid is placed on the base, and a protective iron lid that protects the closed inner lid and is substantially flush with the ground surface is placed on the pedestal. Repairing method for public masu etc.