Construction process for raft foundation of oversized equipment

Abstract

The invention relates to the technical field of raft foundation construction, and provides a super-large equipment raft foundation construction technology which comprises the steps of foundation pit excavation, soil nailing wall construction, post-grouting cast-in-place pile construction, raft foundation pouring, fat groove pouring and the like. The post-grouting cast-in-place piles are formed through construction at the bottom of the foundation pit, the stability of the raft foundation in the vertical direction is improved on the basis that the bearing capacity of the raft foundation is improved, and the situation that the raft foundation generates displacement in the vertical direction, and consequently settlement of the raft foundation is caused is avoided; and meanwhile, the raft foundation is formed through pouring firstly, a fat groove is formed between the raft foundation and the foundation pit slope, then pouring is conducted on the fat groove so that the raft foundation and the foundation pit can be connected through large-size concrete blocks, the stability of the raft foundation in the horizontal direction can be improved, and displacement of the raft foundation in the horizontal direction is avoided.

Description

technical field [0001] The invention relates to the technical field of raft foundation construction, in particular to a construction technique for super-large equipment raft foundations. Background technique [0002] As the requirements of science and technology become higher and higher, the requirements for the equipment required to meet the experimental conditions are also higher and higher, and the volume of the equipment is also increasing. For large-scale equipment, a stable raft foundation with high load-bearing capacity is an essential condition. [0003] In the prior art, the bearing capacity and stability of the raft foundation are often improved by forming cast-in-place piles at the bottom of the raft foundation. However, the adoption of this construction method can only ensure that the raft foundation will not be displaced in the vertical direction, but cannot guarantee that the raft foundation will not be displaced in the horizontal direction. Contents of the ...

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Problems solved by technology

However, this construction method can only ensure that the raft foundation will not be displaced in the vertical direction, but cannot guarantee that the raft foundation will not be displaced in the horizontal direction

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