Large-deformation-adaptable water stop for use between sluice bottom and deep overburden layer foundation cutoff wall top, and construction method

Abstract

In a large-deformation-adaptable anti-seepage water stop structure for use between a sluice bottom and a deep overburden layer foundation cutoff wall top, an inorganic interface binder (10) is coated on the contact face between a formwork erection cast-in-place concrete cutoff wall (2) and a slot hole poured cutoff wall (1), plastic water stop member (6) is arranged at one side of the formwork erection cast-in-place concrete cutoff wall (2), a copper water stop member (7) is arranged at the other side of the formwork erection cast-in-place concrete cutoff wall (2), the compression modulus of elasticity of a polyethylene closed-cell foam board is 2.4 plus or minus 5MPa, the height of a wall top cavity filled with the polyethylene closed-cell foam board is 30cm, and the widths of cavities on the two sides are 10cm. The invention mainly solves the problem of safe connection between the sluice bottom plate and the cutoff wall top when relative large vertical deformation (up to 6cm) and horizontal deformation (up to 2cm) occur to the deep overburden layer foundation sluice bottom plate concrete while relatively small deformation occurs to the cutoff wall top. The invention also discloses a construction method of the structure.

Description

technical field [0001] The invention belongs to the field of hydraulic structures, and relates to a large-deformation anti-seepage and water-proofing at the top of a foundation wall of a deep covering layer at the bottom of a sluice. The invention also relates to a construction method for large-deformation water-stopping at the top of the anti-seepage wall of the deep covering layer foundation at the bottom of the sluice. Background technique [0002] For sluices built on the basis of deep overburden layers (the thickness of the overburden layer is greater than 30m), when concrete cut-off walls are used for foundation anti-seepage, due to the action of loads during sluice construction and operation, the sluice foundation will inevitably produce large vertical and Horizontal deformation, so a water-stop structure suitable for large deformation must be adopted between the top of the cut-off wall and the bottom of the sluice, so that the load of the sluice will not be transmitt...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned existing background technology, research and develop a kind of deep cover layer foundation anti-seepage wall top large deformation water stop at the bottom of the sluice, which mainly solves the large vertical deformation of the deep cover layer foundation sluice floor concrete When vertical and horizontal deformations (vertical up to 6cm, horizontal up to 2cm) and the deformation of the top of the anti-seepage wall are small, the safety of the connection between the gate bottom plate and the top of the anti-seepage wall

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