JP2550566Y2 - Sewer pipe waterproofing - Google Patents

Description

[Detailed description of the invention]

 0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a waterproofing portion of a connecting portion of a sewer pipe provided underwater. 0002

2. Description of the Related Art Conventionally, mortar cement has been applied on a seam of a sewer pipe to provide a waterproof treatment so that sewage in the pipe does not flow out or groundwater outside the pipe does not flow into the pipe. The mortar cement has a problem that, after hardening, hair cracks are generated on the surface and the waterproof performance is deteriorated. However, in the case of underground burial, the waterproofing part was not always buried in the underground water, and it did not matter much.
Since it is always in the water, there is a problem that external water flows into the sewer from the hair crack on the surface. 0003

[Problems to be solved by the invention] This invention has been made to solve the above-mentioned problems. 0004

[Means for Solving the Problems] A primer made by mixing a process oil or a plasticizer with a water-absorbing polymer such as polyacrylate is applied on the seam of the sewer pipe, and then a liquid chloroprene rubber is further applied thereon. Knead with cement and apply paste putty. 0005

[Function] Putty is one of the components, cement, which absorbs the moisture of liquid chloroprene rubber and hardens, and acts as a waterproof layer. However, in the part in contact with the primer, the water-absorbing polymer removes the moisture of the liquid chloroprene rubber. It is absorbed and the cement cannot be hardened, and the paste remains as a putty layer in that part. Therefore, even if hair cracks occur on the surface of the hardened cement, a layer of putty on which no hair cracks occur remains on the primer, and this acts as a waterproof layer, and water from the outside flows in. Is to prevent it. 0006

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
To explain, a sewer pipe 4 made of concrete, for example,
A primer 2 (hereinafter referred to as a primer containing a water-absorbing polymer as a main component) composed of a water-absorbing polymer such as polyacrylate mixed with a process oil, a plasticizer, etc. Then, putty 3 (hereinafter referred to as a putty containing liquid chloroprene rubber and cement as main components) formed by mixing and kneading liquid chloroprene rubber and cement is applied to an appropriate thickness. Putty 3
Talc or the like may be mixed depending on the application. In the case where it is difficult to apply the primer directly to the seam due to a bad working environment or the like, the primer coated on the putty in advance may be bonded to the seam of the sewer pipe. 0007

[Effect] Since this invention is configured as described above,
A paste-like putty layer that does not harden remains on the primer and acts as a waterproof layer, preventing the inflow of water from the outside and the outflow of sewage from the inside. It has the effect that it can be used without it, and its industrial utility value is high.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sewer pipe joint 2 Primer mainly composed of water-absorbing polymer 3 Putty mainly composed of liquid chloroprene rubber and cement 4 Sewer pipe

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-59-159337 (JP, A) JP-A-60-38733 (JP, U) JP-A-63-109523 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A primer (2) containing a water-absorbing polymer as a main component is applied to the outer surface of a seam (1), and a putty (3) containing a liquid chloroprene rubber and cement as a main component is applied thereon. Features of the drainage treatment section