Pre-burying construction method for raft foundation anchor bolts of high-rise steel structure deep foundation pit

Abstract

The invention provides a high-rise steel structure deep foundation pit raft foundation anchor bolt pre-burying construction method which comprises the following steps that vertically-arranged pre-burying bolts are detachably and fixedly connected to a first supporting frame, and the first supporting frame is connected to a reinforcing mesh of a raft foundation in a clamped mode; a second support frame is detachably and fixedly connected between the middle parts of the embedded bolts; a third support frame is supported between the bottom surface of the foundation pit and the embedded bolts; by adjusting the first supporting frame, the second supporting frame and the third supporting frame, the identification points on the embedded bolts are moved to the set positions, and the third supporting frame is fixedly connected to a waterproof protection layer on the bottom face of the foundation pit; the embedded bolts and the reinforcing mesh are fixedly connected through connecting pieces, and the embedded bolts are fixedly connected to the third supporting frame; the first supporting frame and the second supporting frame are detached from the embedded bolts, and a raft foundation is poured in the foundation pit; therefore, it is guaranteed that the embedded bolt does not deform, shift and sink under the load effect in the whole construction process.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for pre-embedding anchor bolts of a high-rise steel structure deep foundation pit raft foundation. Background technique [0002] In the raft foundation construction of high-rise steel structure buildings, the pre-embedding of anchor bolts is a key process in the construction of raft foundations, and the pre-embedding accuracy directly affects the installation deviation of the first steel column. Pre-embedded bolts are fixed. Since the height of the raft foundation is generally above 1.2m, and the lower ends of the pre-embedded bolts are suspended in the air, it is difficult to ensure that the pre-embedded bolts will not shift during construction processes such as binding steel bars, welding, formwork and pouring concrete. SUMMARY OF THE INVENTION [0003] In view of the problems in the prior art, the present invention provides a construction ...

AI Technical Summary

Problems solved by technology

[0002] In the raft foundation construction of high-rise steel structure buildings, the pre-embedding of anchor bolts is the key process of raft foundation construction, and the pre-embedding accuracy directly affects the installation deviation of the first steel column; the traditional method uses positioning templates or steel-wood hybrid fixing frames. The pre-embedded bolts are fixed. Since the height of the raft foundation is generally above 1.2m, the lower ends of the pre-embedded bolts are suspended in the air. It is difficult to ensure that the pre-embedded bolts will not be displaced during construction processes such as binding steel bars, welding, setting up formwork, and pouring concrete.

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