Construction process for composite pile of foundation and pile tip displacement regulating device

Abstract

The present invention discloses a kind of technology undertaking the construction of ground- work composite column adaptable to the uneven granite heaped-up earth. According to the design of the upper structure for heavy-load duty, the load duty of the peg is determined. According to the principle of applying pegs, erect friction-bearing apparatus at the end of the installation around the granite soil layer; on the solitary rock, set up a bearing peg equipped with a regulating installation for adjusting the elevation of different position. The regulation device comprises cylinder body, top plate and expansion and contraction elements. The top plate and the expansion elements are installed in the cylinder body; the expansion elements are situated in the intra-cavity between the cylinder body and the top plate. Compared with the natural base method, the present invention has solved the problem of constructing tall buildings in the uneven granite residue stratum, thus reducing the subsidence of buildings, making them safe and reliable. Compared with the composite foundation method, it fully makes use of the bearing capacity of the granite residual earth, reduces the number of pegs, successfully solves the problem in the construction of tall buildings in the uneven granite residual earth foundation and reduces the cost.

Description

technical field [0001] The invention relates to a foundation construction technology and its realization device, in particular to a foundation composite pile foundation construction technology and its pile end displacement adjustment device. Background technique [0002] Inhomogeneous granite residual soil is a relatively common geological condition in Xiamen. This geological condition usually manifests as incomplete weathering of granite, forming randomly distributed boulders of different sizes in the foundation soil. The lithology of the boulders is mostly slightly weathered granite, and there are also medium and strong weathered granite. Part of the solitary rock is a slightly weathered granite core, surrounded by a medium and strong weathered shell. For conventional pile foundations, rock blasting is required to pass through boulders during the pile formation process, which is not only difficult to construct, but also easily causes soil dam...

AI Technical Summary

Problems solved by technology

The construction quality of composite foundation is difficult to control, and it is generally used in multi-storey buildings. Therefore, if this method is used, the height of the building needs to be limited. In addition, since the construction of composite foundation is easy to cause disturbance to the granite residual soil, there is a certain risk, and the composite foundation The cost is also higher

[0006] To sum up: In terms of uneven granite residual soil foundation, common foundation schemes not only need to limit the height of buildings, but also have high construction risks and high construction costs

Images