Integral anti-floating structure of underground diaphragm wall and concrete structure floor and its construction method

Abstract

The invention discloses an integral anti-floating structure of an underground continuous wall and a concrete structure bottom plate and a construction method thereof. When making the reinforcement cage of the underground diaphragm wall on the ground, bend the reinforcement cage on the side of the foundation pit into a U shape, and weld the U-shaped steel and the reinforcement cage; The bottom elevation of the foundation pit in the underground diaphragm wall groove, pour the underground diaphragm wall concrete; after the foundation pit is excavated to the bottom, the reinforcement cage of the structural bottom plate is embedded in the groove of the U-shaped steel on both sides of the foundation pit, and then the reinforced concrete structure is poured bottom plate. In the invention, the underground continuous wall used for the excavation and maintenance of the deep foundation pit and the concrete bottom plate used for the permanent structure in the foundation pit are embedded and connected to each other through the profiled steel groove to form an integral force-bearing structure, which can not only ensure the stability of the pit bottom during the excavation process It can also meet the anti-floating requirements of permanent structures, and has the advantages of shortening the construction period, reducing engineering costs, and reducing construction risks.

Description

technical field [0001] The invention relates to an integral anti-floating structure technology during excavation of a foundation pit, in particular to an integral anti-floating structure in which an underground continuous wall and a concrete floor are embedded with each other and a construction process thereof. Background technique [0002] With the deep development of underground space structure, the excavation depth of foundation pit has been increasing continuously in recent years. Due to its excellent waterproof sealing and bending resistance, the underground diaphragm wall is the most commonly used enclosure structure for deep foundation pit excavation in water-rich soft soil areas. During the excavation of deep foundation pits, due to the unloading effect caused by the excavation of the soil in the pit and the seepage effect caused by the unbalanced water head inside and outside the pit, the soil at the bottom of the pit often bulges, and groundwater seepage drives a l...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the construction process of the existing foundation pit, in the design of anti-pit bottom uplift and anti-permanent structural buoyancy, respectively adopts techniques such as filling concrete and anti-lift piles or constructing box top pressure beams, and fails to make full use of the existing underground continuous The anti-lifting performance of the wall has problems such as cumbersome procedures, long construction period, and high cost. Provide an underground continuous wall that can effectively prevent foundation pit surges, ensure the anti-floating of the permanent structure, and have a short construction period and low cost. Integral anti-floating structure with interlocking concrete base plates and its construction method

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