Connection method for wall sections of ultra-deep anti-seepage wall

Abstract

The invention discloses a connection method for the wall sections of an ultra-deep anti-seepage wall. The connection method for the wall sections of the ultra-deep anti-seepage wall comprises the steps of sequentially arranging downwards a plurality of joint pipes onto the end head of a slotted hole, and pulling out the joint pipes in a process of pouring concrete into the slotted hole, wherein the step of sequentially arranging downwards a plurality of joint pipes onto the end head of the slotted hole comprises the following steps: arranging a valve assembly and an adjustment assembly at oneend of a bottom pipe of each of the plurality of joint pipes; arranging downwards each bottom pipe with the valve assembly and the adjustment assembly at the bottom of the slotted hole, configuring one end of each of the valve assembly and the adjustment assembly to face the bottom of the hole, so that in the process of pouring the concrete, the adjustment assembly adjusts the opening degree of the valve assembly of the bottom pipe, and the phenomenon of pipe casting is prevented; and when the joint pipes are pulled out in the process of pouring the concrete, a pulling-out time for the joint pipes is controlled according to the components of the concrete and an environment temperature, so that the concrete cannot be adhered to the outer walls of the joint pipes. According to the method, the concrete cannot be adhered when the joint pipes are pulled out, a high hole-forming rate is achieved, the drilling amounts of the concrete joints are greatly reduced, the comprehensive working efficiency of the anti-seepage wall is increased, and the ultra-deep anti-seepage wall without wall breakage is formed.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a method for connecting ultra-deep anti-seepage wall sections. Background technique [0002] With the gradual expansion of the scale of water conservancy projects, the overall anti-seepage effect of the dam is required to be simultaneously improved, resulting in the continuous deepening of the depth of the anti-seepage wall. The anti-seepage wall mainly includes several processes of trough formation, hole cleaning, downpipe, joint pipe extraction, and pouring. General engineering only focuses on two key processes of trough formation and pouring. In fact, the pulling out of the joint pipe is also an important part of the cut-off wall. The quality of the pull-out pipe of the joint pipe directly affects the quality of the cut-off wall. [0003] For sand and pebble formations, projects with a depth of more than 100m or even a maximum depth of cut-off walls...

AI Technical Summary

Problems solved by technology

[0003] For sand and pebble formations, projects with a depth of more than 100m or even a maximum depth of cut-off walls exceeding 150 meters or even 180 meters, if the slot is too deep, it is extremely difficult to pull out the joint pipe, and the shrinkage cavity and collapse of the joint hole are prone to occur. The current pipe removal method is adopted. The equipment and equipment cannot meet the requirements. In addition, the risk of bottom pipe casting during the pouring process is high, and the slot hole is too deep to easily lead to joint layers in the poured concrete, so that a continuous ultra-deep cut-off wall cannot be formed.

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