Construction method for super large pile distance deep foundation pit supporting system

Abstract

The invention provides a construction method for a super large pile distance deep foundation pit supporting system. Two rows of supporting piles are constructed at equal distances in the length direction of a foundation pit; when an existing structure exists at the construction part of the supporting piles, the supporting piles are constructed after crossing of the existing structure; after the supporting piles are constructed, crown beams are constructed at the tops of the supporting piles, and then board walls are constructed between the supporting piles located on the two sides of the existing structure, wherein the board walls are constructed with a reverse method; and after the board walls are constructed, the supporting system is constructed. The distance of the equal distance construction of the supporting piles is not larger than two times the diameter of the supporting piles, and the distance between the supporting piles on the two sides of the existing structure is larger than two times the diameter of the supporting piles. Compared with the prior art, row pile supporting and the reverse building method construction are combined, the advantages of the row pile supportingand the reverse building method construction are fully utilized, the structure is simple, safety and reliability are achieved, construction is convenient, and the manufacturing cost is low. Meanwhile,no anchor rope is used, an existing building and existing pipelines are protected while the foundation pit is protected, and good application prospects in foundation pit supporting in the fields suchas city municipal administration are achieved.

Description

technical field [0001] The invention belongs to the technical field of municipal infrastructure, and in particular relates to a construction method for a deep foundation pit support system with super large pile spacing. Background technique [0002] With the rapid development of my country's economy, the scale of ground buildings is getting larger and larger, and at the same time, the underground space is deeply developed, and the requirements for foundation pit engineering are also increasing, and the safety and stability of deep foundation pit support are becoming more and more complicated. Deep foundation pit engineering is a temporary project, and its technical complexity is much higher than that of permanent foundation construction [0003] In the process of excavating deep foundation pits, in order to ensure the safety and reliability of deep foundation pits and prevent casualties and property losses caused by the collapse of deep foundation pits, it is often necessary...

AI Technical Summary

Problems solved by technology

The pile support system is expensive and has a long construction period, while the pile anchor system is easy to disturb the base soil during the construction process. When the soft soil layer is thick, in order to meet the designed uplift bearing capacity, the anchorage section needs to penetrate the soft soil layer. Therefore, it causes a greater environmental risk and a lot of waste in the foundation pit support

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