Water stop structure applied to concrete foundation construction and construction method

Abstract

The invention relates to a water stop structure applied to a construction site and a construction method, and particularly relates to a construction method of a water stop system for concrete foundation construction and the water stop system. The construction method mainly comprises the following steps: 1) determining the position of an expansion joint; 2) positioning a water stop belt; 3) mounting a fixed cushion block; 4) prefabricating a fixed template; 5) splicing and positioning the fixed template; and 6) controlling the perpendicularity. According to the construction method, a water stopdevice is supported and fixed in a foundation construction area through a water stop fixing structure, the water stop fixing structure is composed of the fixed template and the fixed cushion block, the fixed template and the fixed cushion block are applied and fixed in a switching matching mode, the whole structure is easy to prepare and assemble, easy to fix and convenient to mount and dismount,and the water stop device can effectively prevent water leakage of a foundation construction structure and can prevent water seepage between joints.

Description

technical field [0001] The invention relates to a water-stop structure and a construction method applied to a construction site, in particular to a construction method and a water-stop system for concrete foundation construction. Background technique [0002] In water conservancy and hydropower projects, such as underground facilities, tunnel culverts, drainage aqueducts, dams, river gates, liquid storage structures and other large projects in the architectural design, due to the continuous pouring of concrete, or due to deformation of the foundation, or due to temperature changes Due to thermal expansion and contraction of concrete components caused by thermal expansion and contraction, it is necessary to reserve construction joints, settlement joints, and deformation joints. Water stop belts must be installed at these joints to prevent the leakage of concrete water bodies. The selection of water stop belts should be based on the structure. The importance level of the defor...

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Problems solved by technology

[0002] In water conservancy and hydropower projects, such as underground facilities, tunnel culverts, drainage aqueducts, dams, river gates, liquid storage structures and other large projects in the architectural design, due to the continuous pouring of concrete, or due to deformation of the foundation, or due to temperature changes Due to thermal expansion and contraction of concrete components caused by thermal expansion and contraction, it is necessary to reserve construction joints, settlement joints, and deformation joints. Water stop belts must be installed at these joints to prevent the leakage of concrete water bodies. The selection of water stop belts should be based on the structure. The importance level of the deformation joint, the deformation amount of the deformation joint, the water pressure, the working environment of the waterstop, economic factors and other conditions are comprehensively considered and determined. After long-term tests and practical operations, it is found that if the waterstop is used to set the steel plate waterstop, there will be a better effect. It has a good water-stopping effect, and to a certain extent, it solves the problem of leakage caused by the construction joints that must be left due to the limitation of the construction technology level, but the disadvantage is that it uses a large number of steel plates and supporting components. It is more complicated, and the anti-seepage effect is not ideal. Therefore, in order to overcome the defects, high elastic polymer materials with reversible deformation are often used as waterstops.

[0003] Rubber waterstops or plastic waterstops are commonly used in super-long deformation joints of underground structures to deal with the leakage of deformation joints that require water stop. Good extension and deformation characteristics ensure that the deformation joints can freely expand and contract under the conditions of temperature changes or uneven settlement to ensure that they are intact and not damaged, so they are widely used; however, during foundation construction, waterstops are arranged along the foundation construction area, and the usual practice is to place steel bars Make it into a curved shape, tighten the turning head on both sides of the waterstop, tie the straight section to the horizontal steel bar of the shear wall, and then use the half-side formwork to clamp the waterstop to pour concrete, but this installation method cannot firmly fix the waterstop. The water belt, which causes the two ends of the water stop to easily shift, cannot ensure that the water stop is centered, and it cannot better ensure that the middle expansion ball is in the middle of the deformation joint

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