Novel fore shaft pipe

Abstract

The invention relates to a novel fore shaft pipe. The problems that rigid round steel pipe are adopted as existing fore shaft pipes, the diameters cannot change along with the widths of continuous walls, the fore shaft pipes need to be prepared according to the widths of the different continuous walls, and adaptability is poor are solved. The novel fore shaft pipe is of a foldable structure overall and comprises a plurality of sections of strip plates with enough thicknesses, and the strip plates are connected through high-strength connecting shafts. Locking devices are arranged between corresponding strip plates. The strip plates are provided with contact planes. The strip plates rotate and adjust to the fore shaft width equal to the width of the continuous wall around the connecting shafts, the strip plates rotate around the connecting shafts, and the closed shape of the end of a wall section is changed. The whole fore shaft pipe forms the foldable structure, the occupied space can be reduced after folding, transport is convenient, the width of the fore shaft pipe can also be changed through folding, thus the fore shaft pipe adapts to building of underground continuous walls of different widths, the width of the fore shaft pipe is adjusted freely, adaptability is good, and the fore shaft pipe is easier to place and can be reused.

Description

technical field [0001] The invention belongs to the field of underground continuous wall construction, in particular to a novel locking pipe. Background technique [0002] The underground diaphragm wall is a kind of trenching machine used on the ground for basic engineering. Along the peripheral axis of the deep excavation project, a long and narrow deep trench is excavated under the condition of mud retaining wall. After the trench is cleaned, it is hung in the trench Reinforcement cages, and then use the conduit method to pour underwater concrete to form a unit trough section. In this way, a continuous reinforced concrete wall is built underground as a water interception, anti-seepage, load-bearing, and water-retaining structure. Before the trench section is excavated, the guide wall is constructed along the longitudinal axis of the continuous wall, and is poured with cast-in-place concrete or reinforced concrete. The underground diaphragm wall is composed of many wall se...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the defect that the existing locking pipe adopts a rigid circular steel pipe, the diameter cannot change with the width of the continuous wall, it needs to be prepared according to the width of the continuous wall, and the defect of poor adaptability is provided, and a new type of locking pipe can be provided. Free adjustment according to the width of the continuous wall, good adaptability

[0006] The present invention also solves the defect that the existing locking pipe adopts a rigid circular steel pipe, which can only form a concave arc shape and cannot adapt to the edge shape of different steel cages, and provides a new type of locking pipe, which can change itself through rotation shape, thus adapting to the edge shape of different reinforcement cages

[0007] The present invention also solves the defects that the existing locking tube uses a hydraulic jacking frame to lift and pull the tube axially, which is easy to damage the guide wall, and it is not easy to accurately grasp the timing of pulling the tube. It provides a new type of locking tube that can be folded The way to relax, easy to pull out the locking tube

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