Construction method for pulling joint pipe in underground diaphragm wall section connection construction

Abstract

The invention provides a construction method for pulling a joint pipe in underground continuous wall section connection construction. The construction method comprises the steps that a pressure sensoris installed on the pipe wall of a first joint pipe; the first joint pipe is hoisted into the joint hole; the multiple middle joint pipes are sequentially hoisted into the joint holes, then the tailjoint pipe is hoisted into the joint holes, and all the joint pipes are connected; and when concrete pouring in the slotted hole where the joint pipe is located reaches the demolding time and the pressure of the pressure sensor does not exceed the set pressure, the whole joint pipe is lifted upwards by the set distance. The method has the beneficial effects that the demolding time is accurately grasped, so that when the whole joint pipe is pulled out, joint hole shrinkage or collapse cannot be caused too early, and pipe wall dead casting cannot be caused too late; meanwhile, the pressure sensor is arranged on the wall of the first joint pipe, so that the burying depth and the pulling difficulty degree of the first joint pipe in concrete can be effectively monitored, the whole joint pipe cannot be buried too deep to be pulled out while the pulling time is met, and the construction efficiency is improved.

Description

technical field [0001] The present disclosure relates to the technical field of construction of underground diaphragm wall sections, in particular to a construction method for pulling out joint pipes in the connection construction of underground diaphragm wall sections. Background technique [0002] The joint pipe method is an advanced technology for joint treatment of concrete cut-off wall construction at present. It has reliable quality of cut-off wall joints and high construction efficiency; it has low requirements for slot deflection; it is especially suitable for projects with tight construction schedules and high strength requirements for wall materials . The construction of the joint pipe method has certain technical difficulties, but it has incomparable advantages in other joint connection schemes: first, due to the lower joint pipe, it saves the time for setting the joint concrete, improves the work efficiency, and saves the wall Second, the arc-shaped shape of the...

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Problems solved by technology

[0003] However, in the prior art, during the actual construction of the joint pipe method, it is difficult to grasp the timing of the joint pipe being drawn out of the joint hole. Excessive bonding strength of the concrete in the hole makes it difficult to pull out the joint pipe or is cast to death and cannot be pulled out, which affects the normal construction of the diaphragm wall

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