Construction device and method for undisturbed breaking of steel strand diaphragm wall near subway structure

Abstract

The invention discloses a construction device for undisturbed breaking of a steel strand diaphragm wall near a subway structure. The construction device comprises an upper installing base, a lower installing base, a first grab bucket and a second grab bucket, wherein the upper installing base and the lower installing base are each of a rectangular base body structure, a round hole is formed in the center position of the upper installing base, a guide base is fixedly welded to the round hole position of the upper installing base, a guide rod is movably arranged in the guide base, and an external thread structure is arranged on the outer side wall of the lower end of the guide rod. The invention further discloses a construction method for undisturbed breaking of the steel strand diaphragm wall near the subway structure, the construction method comprises the following steps of jet grouting pile test, subway side reinforcement, continuous wall construction, surveying and setting-out, hole pre-leading and steel strand bite-off and removal, and a new construction method for corresponding construction method construction model selection is provided. The construction problems that a newly-built building is adjacent to a subway deep foundation pit and the like is solved, the potential safety hazard of subway operation is avoided, and the method is reasonable in design, safe and reliable, and has good popularization and use values.

Description

technical field [0001] The invention relates to the technical field related to building construction, and in particular relates to a construction device and method for a ground connecting wall adjacent to a subway structure without disturbance to break steel strands. Background technique [0002] Generally, the subway line has a large flow of people, high social concern, and high political sensitivity. The excavation process of the deep foundation pit of a new building adjacent to the subway has a great impact on the existing subway lines. During the construction of the deep foundation pit, the original subway support will be broken. structure, it is easy to cause disturbance to the subway operation line. The original method of removing the steel strands of the original support structure is to use a rotary drilling rig to lead the hole, break the steel strands, and then carry out the grab groove. This method cannot provide steel strands The line is accurately positioned, and...

AI Technical Summary

Problems solved by technology

[0002] Generally, the subway line has a large flow of people, high social concern, and high political sensitivity. The excavation process of the deep foundation pit of a new building adjacent to the subway has a great impact on the existing subway lines. During the construction of the deep foundation pit, the original subway support will be broken. structure, it is easy to cause disturbance to the subway operation line. The original method of removing the steel strands of the original support structure is to use a rotary drilling rig to lead the hole, break the steel strands, and then carry out the grab groove. This method cannot provide steel strands The line is accurately positioned, and the lead-in hole takes a long time, which wastes cost and construction period. If the lead-in hole does not break the steel strand, the grab of the slotting machine will be forcibly broken during the construction of the ground connection wall, which will easily cause disturbance to the subway operation line, and cause Security risks

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