Calculation method of soil engineering grid tensile force inside multilayer ribbed cushion layer

A technology of geogrid and reinforced cushion, applied in the direction of calculation, special data processing application, instrument, etc., can solve the problems of difficulty in adoption, parameter error of tensile force calculation of geogrid, etc., to prevent distortion, improve rationality, and simplify effect of treatment

Inactive Publication Date: 2015-04-29
CHINA RAILWAYS CORPORATION +1
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Problems solved by technology

[0007] Therefore, the calculation of the tension of the geogrid inside the multi-layer reinforced cushion is the key content of the design of the pile-top reinforced cushion of the pile-net composite foundation, while the existing calculation method for the tension of the geogrid can only c

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  • Calculation method of soil engineering grid tensile force inside multilayer ribbed cushion layer
  • Calculation method of soil engineering grid tensile force inside multilayer ribbed cushion layer
  • Calculation method of soil engineering grid tensile force inside multilayer ribbed cushion layer

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Embodiment Construction

[0047] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] A method for calculating the tensile force of a geogrid inside a multilayer reinforced cushion, comprising the following steps:

[0049] ① First determine the plane layout parameters of the pile-net composite foundation, and determine the equivalent linear distributed load at the surface position of the reinforced cushion;

[0050] ② Determine the section parameters of the equivalent composite plate structure of the reinforced cushion;

[0051] ③According to the elastic foundation beam analysis method, the deformation equation and internal force equation of the reinforced cushion are determined by the deformation coordination boundary conditions;

[0052] ④ According to the deformation equation and internal force equation of the reinforced cushion, calculate the tension of the geogrid caused by the settlement deformation of the embankm...

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Abstract

The invention provides a calculation method of soil engineering grid tensile force inside multilayer ribbed cushion layer; the method comprises the following steps: firstly judging a pile net composite foundation plane layout parameter, then determining equivalent linear distribution loads at a ribbed cushion layer surface, and the like; determining a cross section parameter of a ribbed cushion layer equivalent composite plate structure; and then based on an elastic grade beam analyzing method, determining a ribbed cushion layer deformation equation and an internal force equation from a deformation coordinate boundary condition; based on the ribbed cushion layer deformation equation and the internal force equation, calculating a soil engineering grid tensile force caused by the deformation when the embankment filled earth subsides; based on an internal force balance equation under an embankment filled earth transverse slide threshold status, calculating the soil engineering grid tensile force caused by the embankment transverse slide; and finally, superposing the soil engineering grid tensile forces caused by the embankment filled earth subside deformation and the transverse slide, thereby obtaining the needed soil engineering grid tensile force parameter. In condition that multiple layers of soil engineering grids are laid on the top cushion layer of the pile net composite foundation piles, the calculation method is able to precisely calculate the tensile force parameter of each layer of soil engineering grid inside the cushion layer.

Description

technical field [0001] The invention belongs to the field of roadbed design and calculation in the subject of geotechnical engineering, and in particular relates to a method for calculating the tensile force of a geogrid inside a multilayer reinforced cushion layer. Background technique [0002] As a soft foundation treatment measure, pile-net composite foundation has the advantages of small settlement deformation, short duration of deformation stability, easy control of construction quality, and good economy, and is widely used in subgrade reinforcement projects in soft soil areas. In order to effectively equalize the upper filling load, reduce the stress concentration at the edge of the pile cap, increase the bearing capacity of the composite foundation, and reduce the overall settlement of the composite foundation, a certain thickness of reinforced cushion is usually laid on the pile top of the pile-net composite foundation. Therefore, the multi-layer reinforced cushion s...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 郭帅杰宋绪国齐春雨许再良董捷陈洪运刘晶磊
Owner CHINA RAILWAYS CORPORATION
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