Nonlinear multielement compound pile foundation

Abstract

The present invention relates to a new-type pile foundation. It can be extensively used for treating various soft ground bases of multistoried, high-rise and super high-rise industrial and civil buildings and road and bridge, etc. Its main technique is characterized by that (1), the plane arrangement form of piles adopts non-symmetrical units or symmetrical units to make combination; (2), it adopts a small quantity of long piles, these long piles mainly are placed in the positions bearing larger load under the column (or under the wall) or central position of symmetrical unit, its single pile is friction pile; (3), it has a lots of short piles, said short pile can be pipe-sinking pile, CFG pile, cement mixed pile or shaped pile; (4), it utilizes said short pile and soil to form the invented composite ground base, on its surface a layer of bedding sandstone is laid; and (5), its total safety degree is greater than 2, its total settlement is less than 50 mm and its difference settlement is less than 10 mm.

Description

1. Technical field [0001] The invention belongs to the field of civil engineering. 2. Background technology [0002] The traditional design of conventional pile foundations usually adopts pile group foundations, and the piles bear all the loads without considering the load bearing effect of the soil. Although such a design is safe, it is not economical; the composite pile foundation belongs to the sparse pile foundation, and the piles The number is usually small, and the load-bearing effect of the soil between the piles can be considered. Generally, the design is based on the control of settlement deformation, but the architectural design applied to soft soil foundations generally does not exceed 8 floors. [0003] For the nonlinear composite pile foundation proposed by Zai Jinmin et al., one of the applicable conditions is to require the natural foundation to satisfy the rate ψ=f a A / Q≥0.5, for soft soil foundation (generally ψ<0.5), the design condition of this method ...

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Problems solved by technology

[0002] The traditional design of conventional pile foundations usually adopts pile group foundations, and the piles bear all the loads without considering the load bearing effect of the soil. Although such a design is safe, it is not economical; the composite pile foundation belongs to the sparse pile foundation, and the piles The number is usually small, and the bearing effect of the soil between the piles can be considered. Generally, it is designed according to the control of settlement deformation, but the architectural design applied to soft soil foundations generally does not exceed 8 floors

[0003] For the nonlinear composite pile foundation proposed by Zai Jinmin et al., one of the applicable conditions is to require the natural foundation to satisfy the rate ψ=f a A / Q≥0.5, for soft ground (generally ψ<0.5), it cannot meet the design conditions of this method

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