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2003•Rock and Soil MechanicsRequires access

Design of composite pile foundation and settlement calculation

Jingbo Su

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Abstract

The design method of composite pile foundation is introduced. Progress of total settlement of composite pile foundation is analyzed; and the method of settlement calculation is presented. The ground settlement due to the load shared by pile group is calculated with layerwise summation method based on Geddes' stress method; and the ground settlement duo to the load shared by soils under pile cap is calculated with layerwise summation method based on Boussinesq's deformation formula; the summation of two settlement above equals the total settlement of composite pile foundation. The design and settlement calculation methods have been applied to certain building with composite pile foundation; the results show that the pile number is decreased about 1/3, and saved cost 35 %, while the total settlement increased a little.

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What this paper is about

The design method of composite pile foundation is introduced. Progress of total settlement of composite pile foundation is analyzed; and the method of settlement calculation is presented. The ground settlement due to the load shared by pile group is calculated with layerwise summation method based on Geddes' stress method; and the ground settlement duo to the load shared by soils under pile cap is calculated with layerwise summation method based on Boussinesq's deformation formula; the summation of two settlement above equals the total settlement of composite pile foundation. The design and settlement calculation methods have been applied to certain building with composite pile foundation; the results show that the pile number is decreased about 1/3, and saved cost 35 %, while the total settlement increased a little.

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Available abstract

The design method of composite pile foundation is introduced. Progress of total settlement of composite pile foundation is analyzed; and the method of settlement calculation is presented. The ground settlement due to the load shared by pile group is calculated with layerwise summation method based on Geddes' stress method; and the ground settlement duo to the load shared by soils under pile cap is calculated with layerwise summation method based on Boussinesq's deformation formula; the summation of two settlement above equals the total settlement of composite pile foundation. The design and settlement calculation methods have been applied to certain building with composite pile foundation; the results show that the pile number is decreased about 1/3, and saved cost 35 %, while the total settlement increased a little.

Key concepts: Pile, Settlement (finance), Foundation (evidence), Composite number, Geotechnical engineering, Engineering, Structural engineering, Mathematics

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