Minimally invasive foundation pit structure for installing elevator on old building and construction method

Abstract

The invention discloses a minimally invasive foundation pit structure for installing an elevator on an old building and a construction method. The construction method comprises the following steps that 1, a position is determined according to design, and a detection detector is used for detecting an underground structure; 2, a special pile foundation is adopted for punching, and meanwhile pile hole protection is well conducted; 3, a reinforcement cage is sunk; 4, concrete bearing platform foundation piles are poured, and a bearing platform foundation is laid; 5, a cushion soil layer is laid onthe bearing platform foundation, and a waterproof layer is arranged on the upper portion of the bearing platform foundation; 6, concrete pier foundation bearing platform short stand column concrete and hoistway foundation pit wall concrete with a certain height are poured; 7, a steel structure is deeply embedded; 8, the hoistway foundation pit wall concrete is poured to the required height; and 9, earthwork is backfilled and tamped, and a drainage ditch is formed on the outer side of the shaft. The construction method has the advantages that underground pipelines are avoided in advance, damage to an original building is avoided, self-weight load is small, the structure is simple, construction is convenient, the period is short, operation is easy, and an upper hoistway is convenient to install.

Description

technical field [0001] The invention specifically relates to a minimally invasive foundation pit structure and construction method for adding an elevator to an old building. Background technique [0002] At present, the more traditional construction method process is adopted for the construction of the elevator foundation pit in the existing building (that is, the old building): excavation of earth---drainage (lowering) of water---deep excavation of earth--- Pouring frame--earthwork backfilling--supporting structure--foundation pit monitoring. In the required space, dig a cuboid space larger than the required elevator shaft, pour the concrete foundation, construct the screw steel Ø14 implantation, use the formwork to pour the shaft wall, earthwork backfill, polyurethane waterproof layer, mortar layer. However, such a construction method requires a large amount of drainage, a large amount of earthwork accumulation, takes up a large space, requires more construction equipmen...

AI Technical Summary

Problems solved by technology

However, such a construction method requires a large amount of drainage, a large amount of earthwork accumulation, takes up a large space, requires more construction equipment and personnel, and has a long construction period, which makes such a construction method affect the lives of residents.

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