Modular pipe-jacking well construction equipment and using method

Abstract

The invention relates to the technical field of open caissons, in particular to modular pipe-jacking well construction equipment and a using method. The modular pipe-jacking well construction equipment comprises pressure sinking equipment, a lifting device and a prefabricated segmental open caisson, wherein the lifting device comprises an adjustable counter-force seat, a positioning supporting piece, a transmission rope, a transmission part and a counterweight piece; and the prefabricated segmental open caisson comprises a plurality of open caisson rings and a base ring located at the bottom of the open caisson ring on the lowermost layer, and inner grooves are formed in the inner side of the base ring and used for being connected with a bottom plate structure in a matched mode. Compared with the prior art, through the arrangement of the lifting device, a small-stroke jack can be adopted in the open caisson sinking process, the height of a counter-force frame stand column is reduced, and the size of a counter-force frame is reduced; the prefabricated segmental open caisson is adopted, the problem of wrong installation during assembly by an operator can be solved, and module assembly is rapid and convenient; and the problem that a steel frame and a brick masonry structure adopted by a traditional tunnel portal need a manual breaking process in the later period is solved.

Description

technical field [0001] The invention relates to the technical field of caisson wells, in particular to a modularized pipe-jacking well construction equipment and a usage method. Background technique [0002] Segmental subsidence is a new caisson construction method, which adopts the construction technology of making well sections in sections and sinking in sections. The height of each well section is generally 1.0-1.5 meters. Compared with the traditional caisson production, the segmental caisson does not need to erect scaffolding and erect large formwork during the well section production process, which speeds up the construction speed and reduces high-altitude operations. [0003] The traditional segmental subsidence device generally uses a high-strength reaction frame, and a jack with a stroke of 1.0-1.5 meters is inverted on the beam of the reaction frame. When the caisson is sinking, soil is taken while passing through the jack. The thrust of the well section is presse...

AI Technical Summary

Problems solved by technology

However, there is a big hidden danger in this method. If the soil reinforcement measures outside the cave door fail or the reinforcement measures are not good, it will cause water gushing, sand gushing and mud gushing when the cave door is broken, causing major safety hazards and quality accidents.

Images