Construction method for breaking SMW construction method pile tunnel portal through pipe jacking construction

Abstract

The invention provides a construction method for breaking an SMW construction method pile tunnel portal through pipe jacking construction. The construction method depends on a movable frame, the movable frame comprises a main frame body with an inner cavity capable of accommodating H-shaped steel, one end of the main frame body is open, longitudinal bars are fixedly connected to the upper and lower parts of two side ends adjacent to the open end, and a pin shaft which is transversely arranged is movably connected between two opposite longitudinal bars. The construction method comprises the following steps that (1), cement soil is chiseled away, and H-shaped steel is chiseled out; (2), the main frame body sleeves the H-shaped steel from the open end, cutting is carried out from the upper end and the lower end of the H-shaped steel, and cutting holes are formed in the cut-off parts; (3), pin shafts penetrate through the cutting holes and are fixed to the longitudinal bars; and (4), the pin shafts are dragged by using a hoisting mechanism to move the H-shaped steel outwards. The H-shaped steel only needs to be cut up and down twice and moved outwards and lifted out after being cut off integrally, the cutting workload is greatly reduced, manpower is saved, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of pipe jacking construction, in particular to a construction method for breaking the SMW pile opening during pipe jacking construction Background technique [0002] The normal removal of the SMW construction method piles corresponding to the portal requires a frame. First, the cement and soil are removed, and then the H-shaped steel is cut and lifted out in sections. The main reason is that the overall cutting safety risk is high, including the overall lifting risk and the collision to the operator. Segmented cutting is beneficial to reduce the risk. Segmented cutting has a large cutting volume, and during the cutting and lifting process, it is necessary to cut out hoisting holes on the H-beam every time, and use the crane lug to lift out. The H-shaped steel needs to be lifted from the position of the portal to the vertical hoisting state. There will be a process of swinging out, and there will be inertia f...

AI Technical Summary

Problems solved by technology

[0002] The normal removal of the SMW construction method piles corresponding to the portal requires a frame. First, the cement and soil are removed, and then the H-shaped steel is cut and hoisted out in sections. The main reason is that the overall cutting safety risk is high, including the overall hoisting risk and the collision to the operator. Segmented cutting is beneficial to reduce the risk. Segmented cutting has a large cutting volume, and during the cutting and lifting process, it is necessary to cut out hoisting holes on the H-beam every time, and use the crane lugs to lift out. The H-shaped steel needs to be lifted from the position of the portal to the vertical hoisting state, there will be a process of swinging out, there is inertia force, and there is a certain safety risk

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