Pile arrangement method for friction pile groups and computing method of composite-foundation bearing capacity thereof

Abstract

The invention relates to a pile arrangement method for friction pile groups and a computing method of composite-foundation bearing capacity thereof, and belongs to the application filed of bearing capacity of construction foundation and foundation reinforcement. Pile groups under one cushion cap are composed of an inner pile positioned at the center of the pile location and a plurality of outer piles around the inner pile, wherein the inner and outer piles are formed in the mode that solid preformed piles, tubular piles with closed lower ends, tube-sinking cast-in-situ piles and other driven piles are disposed with the methods of hammering, vibratory injection, pressfit and the like, and the inner and outer piles confirm the bearing capacity of pile group composite foundations by measuring various kinds of parameters. The pile arrangement method for friction pile groups and the computing method of composite-foundation bearing capacity thereof, have the advantages that as for the foundation with large areas of loose cohesionless soils, the composite foundation bearing capacity outside and inside the pile group structures is enhanced as much as possible within a local range, without a requirement of disposing the whole foundation soils, thereby lowering difficulties of construction, shortening construction periods and improving economical efficiency; by the means of squeezing effect of piles and hooping effects of the outer piles, the soils between piles are compacted tightly and the internal bearing capacity of the soils are fully exerted, thereby making the inner piles, soils between piles and outer piles work together as a whole.

Description

technical field [0001] The invention relates to a pile arrangement method for friction pile groups and a calculation method for the bearing capacity of a composite foundation, which belongs to the application field of building foundation bearing capacity and foundation reinforcement. Background technique [0002] Since the 1980s, my country's reform and opening up has been comprehensively promoted, and the urbanization process has been accelerating. More and more large-scale facilities such as industrial and civil construction projects, municipal projects, and road and bridge projects need to be built. Improvement puts forward higher and higher requirements: it is necessary to pay attention to the cost of the project, but also to pay attention to sustainable development to alleviate the deteriorating environmental problems, and at the same time to prevent secondary disasters caused by the project. Among them, pile foundation, as one of important foundation engineering and com...

AI Technical Summary

Problems solved by technology

However, the traditional pile layout methods do not take into account the unevenness of the superstructure load distribution on each pile and the unevenness of the stiffness of each pile, and carry out a unified design on pile parameters such as cross-sectional size and pile length. This results in unreasonable distribution of pile forces, uncoordinated pile deformation and waste of materials.

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