CN-122013868-A - Prestressed high-strength concrete sewage pipeline and manufacturing method thereof

CN122013868ACN 122013868 ACN122013868 ACN 122013868ACN-122013868-A

Abstract

The application discloses a prestressed high-strength concrete sewage drain pipe and a manufacturing method thereof. The structure can synchronously realize the fundamental improvement of the cracking resistance of the pipe structure and the long-term dynamic sealing of the interface under the micro-deformation of the foundation through the combination of the pretensioned prestressing high-strength concrete pipe body and the socket type double-channel flexible sealing interface system. The method comprises the following steps of S1, fixing a die with a bell end steel die and a spigot end steel die on a long line pedestal, wherein the spigot end steel die is integrated with a flange plate, S2, penetrating prestressed steel bars into the die and integrally stretching according to stretching control stress, S3, pouring concrete with the strength grade not lower than C80 into the die, vibrating and compacting, curing, S4, releasing the prestressed steel bars after the concrete reaches preset strength, and removing the die to obtain a pipe body, and S5, installing an elastic sealing ring in a groove on the outer wall of the spigot end of the pipe body to obtain the prestressed high-strength concrete sewage pipeline.

Inventors

GUO WEI
FANG FUBING
QIAN WEIJUN
SUN ZHE
KE HAIPENG

Assignees

西安交通大学
浙江建设职业技术学院
湖州海通管桩有限公司
浙江富春紫光环保股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260310

Claims (8)

1. A prestressed high strength concrete sewage drain, comprising: a pipe body made of pretensioned prestressing and high-strength concrete is adopted; the inner wall of the bell mouth prefabricated at one end of the pipe body is provided with at least one annular sealing groove; The socket is prefabricated at the other end of the pipe body, and the outer side of the socket is provided with a flange sheet and at least one groove for installing an elastic sealing ring; the socket is welded and fixed with the prestressed reinforcement in the pipe body through the flange plate.
2. The prestressed high-strength concrete sewage pipe of claim 1, wherein the concrete strength grade of said pipe body is not lower than C80, and said inner bearing wall and said outer socket wall are respectively provided with two annular sealing grooves and two grooves for installing elastic sealing rings.
3. The prestressed high-strength concrete sewage pipe of claim 1 or 2, wherein said socket and spigot are connected by socket joint, and when installed, allow relative angular displacement of adjacent pipe sections of ±1° to ±2° at the interface.
4. The manufacturing method of the prestressed high-strength concrete sewage pipeline is characterized by comprising the following steps of: S1, fixing a die with a bell end steel die and a spigot end steel die on a long line pedestal, wherein the spigot end steel die is integrated with a flange plate; s2, penetrating the prestressed reinforcement into a die and integrally tensioning according to tensioning control stress; S3, pouring concrete with the strength grade not lower than C80 into the mould, vibrating and compacting, and curing; s4, after the concrete reaches the preset strength, placing the prestressed reinforcement, and removing the mould to obtain a pipe body; And S5, installing an elastic sealing ring in a groove on the outer wall of the socket end of the pipe body to obtain the prestressed high-strength concrete sewage drain pipe.
5. The method according to claim 4, wherein in S2, the prestressed reinforcement is a spiral rib wire, and the tension control stress is 0.70 to 0.75 times as high as a standard value of the prestressed reinforcement.
6. The method according to claim 4, wherein in S3, silica fume and/or ore powder is mixed in the concrete mixture ratio, and the curing is steam curing.
7. The method according to claim 4, wherein in S5, the elastic seal ring is an EPDM rubber seal ring having a shore hardness of 70±5.
8. The method of manufacturing according to claim 4, further comprising the step of embedding a sensor in the pipe body before the casting of S3 or after the pipe body is obtained S4, the sensor being used to monitor the stress, strain or leakage state of the pipe.

Description

Prestressed high-strength concrete sewage pipeline and manufacturing method thereof Technical Field The invention relates to the technical field of concrete pipelines, in particular to a prestressed high-strength concrete sewage pipeline and a manufacturing method thereof. Background Municipal sewage pipes are key components of urban underground life lines, and the performances of the municipal sewage pipes are directly related to public health, environmental safety and urban toughness. At present, municipal sewage pipe networks with huge stock in China generally face two major core challenges, namely, the structural durability is insufficient, the traditional concrete pipe is low in tensile strength, pipe body cracking and pressure-bearing deformation are easy to occur under the combined action of external soil pressure, traffic dynamic load and internal corrosion to become leakage hidden trouble, and the sealing efficiency of the system is low, a large amount of groundwater is infiltrated due to dislocation of pipe body cracks and rigid interfaces, the water inlet concentration of a sewage treatment plant is severely diluted, and huge waste of energy consumption and medicine consumption and treatment efficiency are reduced. In order to solve the problems, the industry tries to improve the pipe by thickening the pipe wall, using reinforced plastic pipes and the like, but under the complex and severe working conditions of non-excavation jacking pipes, large burial depths (such as more than 5 meters), soft soil foundations and the like, the problems of cracking resistance of the pipe body and dynamic sealing of the joint are still difficult to solve fundamentally. The problems of structural cracking and joint leakage of the existing pipeline still stand out under the action of construction jacking force and long-term soil pressure. Therefore, there is a need to develop a prestressed high-strength concrete sewage pipe and a manufacturing method thereof to solve the problems in the prior art. Disclosure of Invention The invention aims to provide a prestressed high-strength concrete sewage drain pipe and a manufacturing method thereof, which can synchronously realize the fundamental improvement of the crack resistance of a pipe structure and the long-term dynamic sealing of an interface under the micro-deformation of a foundation through the combination of a pretensioned prestressed high-strength concrete pipe body and a socket type double-channel flexible sealing interface system, and have the advantages of simple structure and convenient use so as to solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: The manufacturing method of the prestressed high-strength concrete sewage pipeline comprises the following steps: S1, fixing a die with a bell end steel die and a spigot end steel die on a long line pedestal, wherein the spigot end steel die is integrated with a flange plate; s2, penetrating the prestressed reinforcement into a die and integrally tensioning according to tensioning control stress; S3, pouring concrete with the strength grade not lower than C80 into the mould, vibrating and compacting, and curing; s4, after the concrete reaches the preset strength, placing the prestressed reinforcement, and removing the mould to obtain a pipe body; And S5, installing an elastic sealing ring in a groove on the outer wall of the socket end of the pipe body to obtain the prestressed high-strength concrete sewage drain pipe. By adopting the technical scheme, the manufacturing flow of the pipeline is limited, the pre-tensioning method is used for establishing the pre-stress of the concrete, the high-strength concrete is combined, the pipe body has high crack resistance, and the sealing ring is arranged to prepare for forming a dynamic sealing interface. In the S2, the prestressed reinforcement is a spiral rib steel wire, and the tension control stress is 0.70-0.75 times of the standard strength value of the prestressed reinforcement. By adopting the technical scheme, the spiral rib steel wire is adopted, and the tension stress is controlled in the interval, so that enough effective pre-compression stress can be safely and efficiently built in the concrete, and the pipe body is ensured to obtain high ring rigidity and crack resistance load. In the S3, the concrete is mixed with silica fume and/or mineral powder in a mixing ratio, and the curing is steam curing. By adopting the technical scheme, the compactness and strength of the concrete can be improved by adding the active admixture, the early strength development can be accelerated by steam curing, the production period is shortened, and the strength index of C80 and above is ensured to be reached. In the S5, the elastic sealing ring is an EPDM rubber sealing ring, and the Shore hardness of the elastic sealing ring is 70+/-5. By adopting the technical scheme, the EPD