Raft foundation building lifting and reinforcing structure and method under corrosive geological environment

Abstract

The invention discloses a raft foundation building lifting and reinforcing structure and method under a corrosive geological environment. The lifting and reinforcing structure comprises a lower columnof an existing building, a raft foundation connected with the bottom of the column, a composite foundation reinforcing layer connected with the lower portion of the raft foundation, a composite pilefoundation connected with the lower portion of the composite foundation reinforcing layer and a water stop curtain connected to the periphery of the raft foundation. During the construction, by arranging the water stop curtain, blocking of the water in a water containing layer and preventing of the outflow of slurry and in-situ water and soil are facilitated, the inverted-L-shaped design of the water stop curtain can further avoid the re-corrosion of the raft foundation, and the limit of the lateral displacement is ensured; and by arranging the composite foundation reinforcing layer and the composite pile foundation, local lifting and overall reinforcement of the raft foundation are facilitated, the water stop curtain is combined to improve the overall bearing capacity, by forming groundwater monitoring holes, monitoring of the level of groundwater during the field construction is facilitated, and maintaining of the stability of water and soil pressure in the underground environment isfacilitated.

Description

technical field [0001] The invention belongs to the technical field of building uplift and reinforcement construction, and in particular relates to a structure and method for uplift and reinforcement of a raft foundation building in a corrosive geological environment. Background technique [0002] In building construction, the raft foundation is widely used because of its large bearing capacity, adaptability to soil layers with weak foundation bearing capacity and good integrity. With the construction of high-rise buildings or super high-rise buildings, the building has higher requirements on the geological conditions of the site. In the past, the buildings built on the corrosive strong weathered rock layer by raft foundation, in areas with long-term flowing groundwater or abundant precipitation, due to water and soil action, water and soil loss and foundation bearing capacity reduction, etc., made the original construction in a relatively The overall settlement or uneven s...

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Problems solved by technology

[0004] The present invention provides a lifting reinforcement structure and method for a raft foundation building in a corrosive geological environment, which is used to solve the problem of setting up the lifting reinforcement structure when there is an aquifer in the raft foundation building in a highly corrosive and strongly weathered rock layer and a strong weathered mudstone layer. Technical issues such as grouting, monitoring and water level control of uplifted and reinforced structures, and construction of uplifted and reinforced structures in various parts

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