Deep and shallow pit combined supporting structure with water resistance function and construction method thereof

Abstract

The invention belongs to the field of foundation pit supporting structures, and particularly discloses a deep and shallow pit combined supporting structure with a water resistance function. The deep and shallow pit combined supporting structure with the water resistance function comprises a shallow foundation pit structure and a deep foundation pit structure. The shallow foundation pit structure comprises a shallow foundation pit base and a foundation slab, wherein the shallow foundation pit base is horizontally arranged, and the foundation slab is arranged above the shallow foundation pit base. A water-blocking sunken pool is formed in the side, facing the foundation slab, of the shallow foundation pit base. The upper end of the deep foundation pit structure is connected with one end of the foundation slab and abuts against the side face of the shallow foundation pit base. The deep foundation pit structure comprises a diaphragm wall and a deep foundation pit side wall, wherein the diaphragm wall and the deep foundation pit side wall are vertically arranged. One side of the diaphragm wall is attached to the deep foundation pit side wall, the other side of the diaphragm wall is attached to the side face of the shallow foundation pit base, and a water-resisting blocking groove is formed in the side, attached to the deep foundation pit side wall, of the diaphragm wall. The invention further provides a construction method corresponding to the deep and shallow pit combined supporting structure with the water resistance function. The deep and shallow pit combined supporting structure with the water resistance function and the construction method guarantee the foundation pit safety and the durability of structural engineering, and have the advantages of being convenient and fast to construct, economical, practical, high in water resistance and seepage resistance and the like.

Description

technical field [0001] The invention belongs to the field of support structures for foundation pits, and more specifically relates to a composite support structure for deep and shallow pits with a waterproof function and a construction method thereof. Background technique [0002] The foundation pit project is a construction project in which an underground space is excavated from the ground. A vertical retaining enclosure structure is generally arranged around the foundation pit. The enclosure structure is generally a plate (pile) with a certain insertion depth under the base of the excavation surface. Wall structure, with the needs of actual engineering, for example, in underground structures such as subways and underground spaces, deep and shallow pit composite projects have appeared, and a deep and shallow pit composite enclosure system has been set up to match it. [0003] The existing deep and shallow pit composite enclosure system has the following two structures and c...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a composite support structure for deep and shallow pits and its construction method, wherein combined with the characteristics of the composite support structure for deep and shallow pits and its construction characteristics, a waterproof function is designed accordingly. The deep and shallow pit composite support structure and its construction method, through the structure between the foundation floor of the shallow foundation pit and the connecting wall of the deep foundation pit enclosure structure, and the structure between the foundation floor of the shallow foundation pit and the side wall of the main structure of the deep foundation pit The improvement and waterproof design effectively solved the problems of poor waterproof sealing, serious leakage of water and corrosion of steel bars at the connection between the bottom plate of the foundation pit of the shallow foundation pit and the ground connection wall of the enclosure structure of the inner foundation pit, and the side wall of the main structure of the deep foundation pit , which ensures the safety of the foundation pit and the durability of the structural engineering. It can be applied to the fields of deep foundation pit engineering such as housing construction, rail transit, and ports. In structural systems where foundation-slab connections are used as support and as a measure against buoyancy of the structure

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