A sheathing device for a prestressed steel cylinder reinforced concrete pipe jacking joint

Abstract

The invention relates to the technical field of pipelines, in particular to a jacket device of a prestress steel cylinder reinforced concrete top pipe connector. The jacket device comprises a bellmouth steel sleeve, a socket steel sleeve, connector sealing glue and a pine board. Compared with the prior art, the rubber jacket device of the prestress steel cylinder reinforced concrete top pipe connector is additionally arranged, mud and sand can be effectively prevented from entering a joint through a rubber jacket, grout can be evenly scattered around a pipeline through an annular groove in the end of the rubber jacket, an integral mud sleeve is rapidly formed, the resistance of a prestress steel cylinder reinforced concrete top pipe is reduced, and the jacket device is particularly beneficial to large-caliber and long-distance prestress steel cylinder reinforced concrete top pipes. The jacket device has the beneficial effects of being simple in structure, reliable in technique, easy and convenient to construct and install, low in cost and the like, the structure of the prestress steel cylinder reinforced concrete top pipe connector tends to be mature and perfect, the engineering reliability is better improved, accordingly, the application range is wider, and high economic benefits and social benefits are generated.

Description

technical field [0001] The invention relates to the technical field of pipelines, in particular to a sheath device for a prestressed steel cylinder reinforced concrete pipe jacking interface. Background technique [0002] At present, prestressed steel cylinder concrete pipes, code-named PCCP pipes, have been widely used in large-scale water supply and drainage pipeline projects in my country. However, the prestressed steel cylinder concrete pipe is generally buried by the method of slotted buried pipe. Because the construction method of slotting and buried pipe will temporarily occupy a large area of ​​ground roads, which has a great impact on the urban environment and traffic, it has been difficult to implement in large and medium-sized cities. [0003] In the field of urban drainage, reinforced concrete pipes constructed by jacking method have been widely used. In the Shanghai Bailonggang South Line Sewage Conveying Project, more than 40 kilometers of reinforced concrete...

AI Technical Summary

Problems solved by technology

This structural form will have two adverse effects on the construction of JPCCP pipes: 1. During the jacking process, the mud and sand in the formation may enter the joints of the JPCCP pipes, especially the deposition of sand particles in the joints, which may It will affect the free deflection of the pipe jacking joint, which will cause JPCCP pipe jacking to rectify the obstacle. Now, in order to prevent mud and sand from entering, some units use a steel structure sealing device, which not only costs a lot, but also produces negative pressure due to the expansion and contraction deformation of the interface. Secondary technical problems; 2. Mud grouting holes are generally arranged in 3-4 points around the JPCCP pipe, which is not conducive to the diffusion of mud, and it is difficult to quickly form a complete mud sleeve around the pipe jacking, especially for pipe jacking. Disadvantages of long-distance pipe jacking

The above two defects of JPCCP pipes have become the technical bottleneck for the further promotion and application of JPCCP pipes under various geological conditions.

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