Gravel pile and plain concrete pile combined composite foundation

Abstract

The invention discloses a gravel pile and plain concrete pile combined composite foundation. Gravel piles and plain concrete piles are alternately arranged in a field needing to be treated, gravel cushion layers are paved at the tops of the piles, and the length ratio of the gravel piles to the plain concrete pile is 1:2. The gravel piles can effectively compact earth among the piles to solve the problem of uncompleted concretion of new fill stratums and can form drainage channels to achieve the effects of replacing and forming the drainage channels, and meanwhile, foundation liquefaction can be further eliminated by compaction vibration during construction of the gravel piles. The gravel piles, the plain concrete piles and an original natural foundation jointly form the combined composite foundation, and effects of compacting soil mass, replacing and forming the drainage channels, eliminating liquefaction and benefiting soil mass concretion are achieved while bearing capacity can be greatly improved and soil compressibility of the foundation is lowered. The gravel piles and the plain concrete piles are combined, disadvantages are avoided while advantages are complemented, treatment effects are guaranteed while the requirements of a superstructure are met, and effects of capital saving and project period shortening are further achieved.

Description

Technical field [0001] The invention relates to the field of building construction, in particular to a combined type composite foundation of gravel piles and plain concrete piles. Background technique [0002] In engineering practice, people have invented composite foundation, through foundation treatment, the mechanical performance of natural foundation can be improved, so that it can meet the design requirements. Composite foundation refers to the fact that part of the soil of the natural foundation is reinforced during the foundation treatment process, or is replaced or reinforced materials are set in the natural foundation. Under the load, the matrix and the reinforcement jointly bear the load. In engineering practice, some sites and strata have complex conditions. In order to solve problems such as weakness, settlement, consolidation, and liquefaction at the same time, the commonly used treatment methods often fail to achieve the expected results. Therefore, there is a...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the above-mentioned existing conventional composite foundation, the present invention provides a composite foundation combining crushed stone piles and plain concrete piles. This composite foundation combining crushed stone piles and plain concrete piles can not only be replaced by gravel piles and The soil between the piles is compacted to form a vertical drainage channel, which solves the problem of negative frictional resistance of the reinforced piles caused by the unfinished consolidation of the newly filled soil and the self-weight consolidation of the late filling, and the soil between the piles can be reinforced by plain concrete piles to solve the problem of foundation Bearing capacity and deformation problems, the two types of piles are combined to form a composite foundation, which can greatly improve the bearing capacity and deformation resistance of the foundation

The gravel pile in the present invention can effectively compact the soil between the piles, form a vertical drainage channel, solve the problem that the recently filled soil has not been consolidated, and can make full use of the compaction vibration effect during the construction of the gravel pile to further eliminate the impact of the foundation. Liquefaction effect, the plain concrete pile is a kind of rigid pile, the pile body has a certain strength, and the bearing capacity of the foundation can be greatly improved by going deep into the better foundation bearing layer

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