Prefabricated pipe joint structure for pipe-jacking method tunnel hole opening and using method thereof

Abstract

The invention discloses a prefabricated pipe joint structure for pipe-jacking method tunnel hole opening and a using method thereof. A hole is formed in the side wall of a pipe joint body, wherein anembedded steel grating plate is arranged in the hole and used for bearing the load of the side wall, where the hole is positioned, of the pipe joint body; an embedded steel plate is arranged on the side wall of the hole and fixed to a stressed steel bar of the pipe joint body through embedded steel plate anchor bars; the embedded steel grating plate comprises an outer frame matched with the hole and a latticed bearing part arranged in the outer frame; and the embedded steel grating plate is detachably connected with the hole in the mode that a plurality of bolts are arranged between the outerframe and the embedded steel plate. During hole opening, the embedded steel grating plate is removed, and a hole pit is excavated; then, a plurality of cast-in-place anchor bars and a plurality of cast-in-place water-stopping steel plates are welded to the embedded steel plate, and an auxiliary structure is poured; and after the auxiliary structure reaches the design strength, a temporary steel support is dismantled. According to the prefabricated pipe joint structure for pipe-jacking method tunnel hole opening and the using method thereof, the defect of traditional concrete cutting hole opening is overcome, the hole opening difficulty is lowered, and damage to an original pipe-jacking structure is small.

Description

technical field [0001] The invention relates to the technical field of pipe jacking construction, in particular to a prefabricated pipe joint structure for tunnel opening of pipe jacking method and its application method. Background technique [0002] In recent years, with the rapid development of China's economy, the demand for underground space development is increasing. As a trenchless method for underground space construction, the pipe jacking method has become a commonly used method due to its wide applicability and small construction site. The construction method is suitable for the construction of vehicle passages, pedestrian passages, underground pipelines and other facilities. [0003] The pipe jacking joints are usually prefabricated concrete structures. The hydraulic jack is used in the working well to cooperate with the pipe jacking head to cut the soil and press into the soil one by one to form a complete underground structure. The shape of the prefabricated pi...

AI Technical Summary

Problems solved by technology

[0006] 1. The construction risk is high, the difficulty is high, the opening accuracy is low, and follow-up repairs are required

[0007] 2. Chiseling can easily cause structural damage to the bearing capacity, or even structural collapse

[0008] 3. The connection between the original pipe jacking segments and the post-cast auxiliary facilities and the water-stop effect are poor

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