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Concrete pile composite foundation stability calculation method

A technology of concrete piles and composite foundations, applied in design optimization/simulation, geometric CAD, etc., can solve problems such as the inability to accurately calculate the stability of concrete piles and composite foundations

Active Publication Date: 2020-07-10
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for calculating the stability of concrete pile composite foundations in view of the problem that the existing stability analysis methods cannot accurately calculate the stability of concrete pile composite foundations

Method used

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  • Concrete pile composite foundation stability calculation method
  • Concrete pile composite foundation stability calculation method
  • Concrete pile composite foundation stability calculation method

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Experimental program
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Effect test

Embodiment 1

[0069] Such as figure 1 and figure 2 As shown, the foundation stability under the two conditions of the working condition without cushion reinforcement and the working condition of setting geogrid reinforcement is calculated according to the following method. The software used in the calculation of the limit equilibrium method is the slope stability analysis software Rocscienceslide.

[0070] A. Determine the subgrade structure size as follows:

[0071] The width of the subgrade surface on the top of the embankment is w=20m, the height of the embankment is h=5m, and the slope ratio of the side slope is 1:2. The analysis is carried out under the conditions of no cushion reinforcement and 2 layers of geogrid reinforcement.

[0072] Determine the concrete pile layout and pile spacing as follows:

[0073] The foundation is reinforced with C30 concrete round piles with a diameter of 0.5m. The length of the piles is L=17m. , the tensile strength at 2% elongation in the vertical...

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Abstract

The invention belongs to the technical field of geotechnical engineering, and particularly relates to a concrete pile composite foundation stability calculation method. The method comprises the steps:A, determining the roadbed structure size, and determining physical parameters of the roadbed and the reinforcing material; B, determining the position and parameters of an initial sliding surface ofthe foundation; C, determining the ultimate bending moment of the concrete pile considering the cushion layer tie bar effect; D, determining the equivalent shearing resistance of the concrete pile; E, analyzing the stability of the reinforced foundation by adopting an extreme balance method. According to the method, the constraint effect of the cushion layer tie bars on pile body deformation in the composite foundation is considered, the contribution of the cushion layer tie bars under the embankment to the anti-sliding capacity of the pile bodies in the composite foundation can be reflectedmore accurately, and good practicability and reliability are achieved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering, and in particular relates to a method for calculating the stability of a concrete pile composite foundation. Background technique [0002] In order to meet the post-construction settlement control requirements of high-speed railway and expressway subgrades, high-strength piles and geosynthetic materials are widely used in my country's high-speed railway and expressway subgrades to treat soft soil foundations, such as concrete pile network structure composite foundations. The existing analysis methods for the stability of high-strength pile composite foundations, namely the equivalent sand pile method, the axial moment method, and the soil load method between piles, all have certain limitations. [0003] In the equivalent sand pile method, the pile is equivalent to a sand pile with a certain friction angle, and the friction angle is determined by the friction coefficient of the pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/13
Inventor 薛元张东卿罗强刘菀茹张良马宏飞曾锐牟迪周文洋张硕姜浩冯子亮张涛李睿
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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