Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Settlement calculation method of multilayer foundation under any load effect

A calculation method, foundation technology, applied in the field of geotechnical engineering

Inactive Publication Date: 2018-06-15
EAST CHINA JIAOTONG UNIVERSITY
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, there are no research results on the consolidation settlement of layered elastic foundations under arbitrary loads.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Settlement calculation method of multilayer foundation under any load effect
  • Settlement calculation method of multilayer foundation under any load effect
  • Settlement calculation method of multilayer foundation under any load effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] In the embodiment of the present invention, a certain three-layer foundation is taken as an example to carry out calculation example analysis.

[0088] Rectangular, triangular, sinusoidal, trapezoidal wave loads and instantaneous loads are respectively applied to the three-story foundation, considering the load period T = 30 days, and the load amplitude P 0 =1.5*10 5 Pa. The thickness of the three-layer foundation is 1m, 1.5m, 1m respectively, and the elastic modulus is 1*10 7 Pa, 2*10 7 Pa, 1*10 7 Pa, the permeability coefficient is 3*10 respectively -10 m / s, 2*10 -10 m / s, 3*10 -10 m / s.

[0089] The settlement curves of the three-story foundation with time under various different cyclic loads are obtained through calculation, as shown in Figure 4 As shown, it can be seen that with the increase of time, the settlement under the action of instantaneous load increases with time and tends to be stable, while the growth mode of settlement deformation of layered fou...

Embodiment 2

[0091] In the embodiment of the present invention, a certain import and export yard is used as a calculation case for calculation. The storage yard is built on the soft soil foundation, which can be regarded as a double-layer foundation after foundation treatment. The first layer is the treatment layer with a thickness of 16.5m and a stiffness of 6.85*10 6 Pa, the permeability coefficient is 3*10 -9 m / s. The second layer is a soft soil layer without foundation treatment, with a thickness of 19m and a stiffness of 2.95*10 6 Pa, the permeability coefficient is 1.1*10 -7 m / s.

[0092] Before the stockyard is put into official use, there is a preloading period, and the curve of the preloading period and time is as follows Figure 5 shown. Loading size P during preloading period 0 =75kPa, T=100 days, t 1 = 70 days. This load is different from the cyclically changing regular load. It is an arbitrary load. First, the Fourier series is expanded into a sine and cosine function,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Permeability coefficientaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a settlement calculation method of a multilayer foundation under any load effect. The method includes the steps that 1, a consolidation equation is subjected to Laplace transformation, and an initial boundary value condition and an interlayer continuity condition between multiple layers of the foundation are subjected to Laplace transformation; 2, according to a formula obtained after transformation in the first step, a stress solution coefficient matrix of a specific layer is deduced; 3, a waveform function of any load is subjected to Laplace transformation to serve asa boundary condition in a transformation domain; 4, according to the stress solution coefficient matrix and the boundary condition, a matrix transfer method is adopted, and stress and deformation solutions of all the layers in the Laplace transformation domain are obtained; and 5, the stress and the total settlement of any point can be obtained through a Laplace inverse transformation method. Quantitative calculation and predictive analysis of the settlement rule of the layered foundation under any load effect are achieved, and a scientific and effective basis is provided for design and construction of the foundation under the variable-load effect in engineering.

Description

technical field [0001] The invention relates to a settlement calculation method of a multi-layer foundation under arbitrary load, and belongs to the technical field of geotechnical engineering. Background technique [0002] The loads on the foundations of highway embankments, airport runways, storage facilities (oil storage tanks, yards) and industrial plants are often variable loads applied back and forth for a long time. This type of foundation is subjected to the above-mentioned reciprocating load during the consolidation process, which will produce greater additional deformation and settlement than under the static load. Therefore, the study of foundation settlement under arbitrary changing reciprocating loads has important guiding value and application significance for protecting the structures and auxiliary facilities above. [0003] After Terzaghi, many scholars have carried out fruitful research on the consolidation problem. However, the current calculation methods...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E02D33/00E02D1/08
CPCE02D33/00E02D1/08
Inventor 徐长节罗文俊陈其志丁海滨
Owner EAST CHINA JIAOTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com