Water-stop device and construction method for positioning steel cage of underground continuous wall

Abstract

The invention discloses a water-stopping device for positioning a reinforcing bar cage of an underground continuous wall. The main bars of the reinforcing bar cage are also provided with connecting bars facing outward; There is at least one spliced ​​and combined water stop plate, the positioning plate and the water stop plate are arranged in parallel with the surface of the reinforcement cage, and the adjacent water stop plates are sealed and connected by water stop fasteners. When the water stop plate of the application exists, the distance between the steel cage and the groove can be controlled when the steel cage is lowered, which effectively reduces the verticality deviation during the lowering of the steel cage, and at the same time ensures the thickness of the protective layer of the underground diaphragm wall. Reduce the risk of steel corrosion and increase the service life of the structure; the positioning plate is installed on the side of the steel cage of the underground diaphragm wall to avoid the process of leveling the sidewall of the foundation pit during excavation, which not only improves the efficiency of the foundation pit excavation, but also Ensure the smoothness of the side walls of the diaphragm wall.

Description

technical field [0001] The invention relates to the field of underground continuous wall construction, in particular to a water-stopping device for positioning a steel cage of an underground continuous wall and a construction method. Background technique [0002] Under the environment that the country vigorously advocates green construction, energy saving, environmental protection and assembly construction, the underground diaphragm wall is used as the permanent structure side wall of the underground station and the single wall form of the earth-retaining and water-stop enclosing structure in the excavation stage of the foundation pit instead of the traditional subway. The underground diaphragm wall or bored cast-in-place pile + main concrete frame structure of the station solves the stress problem of the ground connection wall as a permanent structure side wall, and at the same time cancels the main frame structure and additional waterproof layer, which can reduce the projec...

AI Technical Summary

Problems solved by technology

For example: when the reinforcement cage of the underground diaphragm wall is lowered, manual verticality control is used, resulting in deviations in the verticality control, and it is difficult to ensure the accuracy of the underground diaphragm wall construction

After the construction of the underground diaphragm wall is completed, if it is used as the main structure, the side wall of the underground diaphragm wall must be leveled, which requires a lot of labor and increases the project cost

The joints between the underground diaphragm wall and the wall are prone to water leakage, which leads to poor effect of the underground diaphragm wall when used as a permanent structure, affects the construction life of the structure, and increases the cost of repair

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