Device and method for fast construction of anti-seepage wall

Abstract

The invention provides an anti-seepage wall rapid construction device and a method. The anti-seepage wall rapid construction device comprises joint pipes, the joint pipes are provided with flexible joint pipe bodies, the bottoms of the joint pipe bodies are fixedly connected with a bottom plate, and the tops of the joint pipe bodies are fixedly connected with a top cover; a sealing cavity is constituted by the joint pipe bodies, the bottom plate and the top cover, the top cover is provided with a joint, the joint is used for being connected with a medium pipe, thus the joint pipes are filled with a pressure medium, or the pressure medium in the joint pipes is discharged. The method comprises the steps that during construction, the two joint pipes are placed at the two ends of a groove hole; the pressure medium is injected into the joint pipes, and a concrete wall is poured in the groove hole; and after the concrete wall is initially set, the pressure medium in the joint pipes is discharged, thus the diameter of the joint pipe bodies is decreased, and the joint pipes are hoisted to form a first groove section; and anti-seepage wall rapid construction is achieved. By adopting the joint pipes with the variable diameter and the small weight, the friction force between the joint pipes and the hole wall can be decreased, the self-weight of the joint pipes is decreased, drilling accidents in hole such as blockage due to tightly casting and pipe detaching are significantly reduced, and the situations that the joint pipes are overweight, and pipe drawing resources are excessively large in investment are avoided.

Description

technical field [0001] The invention relates to the field of anti-seepage wall construction in water conservancy and hydropower projects, in particular to a rapid construction device and method for an anti-seepage wall. Background technique [0002] The anti-seepage wall is an underground continuous wall that is built by pouring concrete under the mud or backfilling other anti-seepage materials in a loose permeable foundation or an earth-rock dam (weir) dam body with mud to solidify the wall. Usually, it is necessary to divide the slot section, that is, divide it into a plurality of different unit slot holes and unit wall sections, and each unit wall section is connected by joints or joints to form a whole anti-seepage wall. The pipe pulling method can be used at the connection. The pipe pulling method is to place the joint pipe on both sides of the slot before pouring the concrete in the first unit slot, and then pour the concrete. After the initial setting of the concrete,...

AI Technical Summary

Problems solved by technology

[0003] In the construction of a cut-off wall on a deep silt foundation, the depth of the cut-off wall reaches 80 meters. When the "joint pipe method" in the prior art is used to construct the joint hole, the joint pipe is generally made of steel pipe. The total length of the joint pipe and the hole depth Consistent, it is spliced ​​by steel pipes with a length of about 3~6m in each section. The car crane is required to cooperate when the joint pipe is installed and the tube is pulled out, and it takes a long time; if the tube is pulled out too late, the surface of the joint The cohesive force of the concrete increases the friction force, which increases the difficulty of pulling out, and even the joint pipe is cast dead and cannot be pulled out, causing accidents in the hole; therefore, when the "joint pipe method" is used for the construction of the joint hole, it needs to invest a lot of resources , low efficiency, and prone to accidents in the hole

However, under the condition of construction depth of 80 meters and deep muddy ground, the difficulty of extubation of the joint pipe increases greatly, and the construction difficulty is high.

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