Dismantling method for bottom plate in foundation pit supporting structure

Abstract

The invention discloses a dismantling method for a bottom plate in a foundation pit supporting structure. The bottom plate comprises a concrete layer and a steel bar layer which are alternately arranged from top to bottom, and the method comprises the following steps that the bottom plate is cut into a plurality of to-be-dismantled areas by utilizing drilling equipment, for each to-be-dismantled area in the plurality of to-be-dismantled areas, crushing equipment and cutting equipment are utilized to alternately conduct dismantling operation layer by layer so as to dismantle the corresponding layer, wherein the crushing equipment is used for crushing the concrete layer, and the cutting equipment is used for cutting the steel bar layer. According to the method, firstly, the bottom plate is divided into a plurality of isolated areas, the bottom plate is dismantled layer by layer in a mode that a breaking pickaxe is used for breaking concrete and a cutting machine is used for cutting off reinforcing steel bars in a matched mode, and therefore simultaneous operation on the plurality of areas on the bottom plate can be achieved, and the dismantling progress is accelerated; and meanwhile, the bottom plate is divided into the plurality of isolated areas, so that the concrete crushing difficulty of the crushing pickaxe is reduced, the steel bar layers are cut layer by layer in cooperation with the cutting machine, and the dismantling efficiency is further improved.

Description

technical field [0001] The invention relates to a building construction method, in particular to a method for removing a bottom plate in a foundation pit support structure. Background technique [0002] The foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection measures adopted for the side wall of the foundation pit and the surrounding environment. Generally, the basement as the support structure of the foundation pit includes a multi-layer concrete structure. The bottom concrete structure is called the bottom plate. The total amount of concrete in the bottom plate can be close to 20,000 cubic meters, and the thickness can generally reach 1.9 meters. 28mm), it is difficult to remove. [0003] In the prior art, the bottom plate in the foundation pit support structure is usually directly removed by mechanical crushing, which is generally simi...

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Problems solved by technology

[0004] 1. Since the bottom plate of the foundation pit support structure is located in the basement, it is not convenient to transport large excavators to the basement. At the same time, due to the large size of the excavator and the limited space in the basement, only a small number of excavators can be allowed to carry out demolition operations at the same time, and the excavation progress is slow. ;

[0005] 2. Due to the large thickness of the bottom plate and many layers of steel bars, the overall structure of the bottom plate is strong. It is more difficult for the existing excavator to cooperate with the gun head to break the concrete, and the obstruction of multi-layer steel bars is easy to wear the gun head and lead to low demolition efficiency.

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