JPS6055653B2 - How to connect pipes to concrete structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for connecting pipes to manholes and other concrete structures.

When connecting a pipe to the wall of a concrete structure such as a concrete manhole, the common method is to drill a hole in the wall, insert the pipe into the hole, and fill the gap with mortar, etc. When connecting plastic pipes such as hard vinyl chloride pipes, the problem arises that it is difficult to connect watertightly because mortar does not adhere closely to the plastic.

Therefore, attempts have been made to improve the watertightness of the joint by attaching an elastic ring such as a rubber ring to the joint of the pipe, inserting it into the mounting hole of the concrete structure, and filling it with mortar, etc. There is. In this method, the pipe must be held in the center of the mounting hole while filling the gap with mortar, which is a cumbersome process, and it is difficult to fill the lower side of the pipe with mortar, so it cannot be completely filled. There was also a risk of water leaking from that area. This invention was made in view of the above points. Thereafter, by removing the resin foam, a pipe mounting hole with a bolt embedded in the peripheral edge is formed in the concrete structure, and an annular elastic body is attached to the pipe mounting hole using the bolt, and the pipe is attached to the annular elastic body. The invention consists in a method of connecting pipes to concrete structures, characterized by the insertion of pipes into concrete structures.

Next, the present invention will be described with reference to embodiments shown in the drawings.

Reference numeral 1 is a concrete manhole, which is formed by pouring concrete using normal means. Before pouring concrete, pipe attachment holes made of resin foam 2 such as styrofoam are placed in predetermined locations on the formwork. Set up the building blocks.

Incidentally, the threaded portion of the bolt 3 is embedded in this tube attachment hole forming block. After pouring concrete, the formwork is removed and the resin foam 2 is removed. Regarding the removal of the resin foam 2, if it does not come out of the wall as it is, it may be crushed, incinerated, or dissolved with a chemical solution. Thus, a pipe attachment hole 4 is formed in the concrete wall, and the bolt 3 is buried in this hole with its threaded portion protruding. Reference numeral 5 denotes an annular elastic body made of rubber or the like for connecting pipes, and its through hole 51 has a diameter slightly smaller than the outer diameter of the pipe 6 to be connected, and a hole is drilled at its edge to allow the bolt 3 to be attached to the through hole 51. By inserting the annular elastic body 5 and screwing the nut 7, the annular elastic body 5 is attached and fixed to the tube attachment hole 4.

Thereafter, the tube 6 is inserted into the through hole 51 of the annular elastic body 5 and connected. Incidentally, reference numeral 8 denotes mortar that fills the gap between the pipe 6 and the pipe attachment hole 4 as necessary. As described above, in this invention, a bolt is partially embedded in a resin foam, the bolt is installed, concrete is poured, the resin foam is removed, and a pipe attachment hole is formed. The annular elastic body can be easily formed with a bolt embedded therein, and the annular elastic body can be easily and securely attached to the tube attachment hole by simply screwing a nut onto the bolt, thereby facilitating the connection of the tube. The pipe is then watertightly connected to the peripheral edge of the through hole of the annular elastic body that is securely attached to the concrete wall.

[Brief explanation of drawings]

1 to 3 are vertical cross-sectional front views showing the method of this invention in the order of its steps.

Claims (1)

[Claims] 1. A resin foam with the threaded part of the bolt embedded in it is placed in a predetermined location and concrete is poured, and then the resin foam is removed to form a pipe attachment hole with the bolt embedded in the peripheral edge of the concrete structure. . A method for connecting a pipe to a concrete structure, comprising: attaching an annular elastic body to a pipe attachment hole using the bolt, and inserting the pipe into the annular elastic body.