Discriminant Method of Sand Liquefaction

L Wang,V Yepes,Xiaodong Peng

doi:10.1051/e3sconf/202124801013

L Wang, V Yepes + Show 1 more

Open Access

https://doi.org/10.1051/e3sconf/202124801013

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Abstract

With the proposal of 1.8 billion mus of cultivated land red line and the rise of land reclamation in China, more and more national defense and civil projects are built on poor geological soil, such as reclamation reefs in the South China Sea. The liquefaction damage caused by earthquake, such as water spraying, grouting and surface cracks, has a great impact on such buildings, and poses a threat to people's lives and property. Therefore, it is of great significance to study the liquefaction of sand in foundation soil. Since Academician Huang Wen-xi first proposed to use indoor dynamic triaxial test to study liquefaction, a series of achievements have been made in the liquefaction of foundation soil. The research methods of sand liquefaction have developed from simple single sample of numerical simulation, numerical simulation and test. Referring to the literature at home and abroad, this paper sorted out the discriminant method of sand liquefaction, experimental study of sand liquefaction and post-liquefaction analysis.

Highlights

With the rapid development of economy and the increasing frequency of human activities, it has brought some great influence to the activities inside the earth
Liu Hanlong [3] and others have carried out a series of experimental studies on calcareous sand by using dynamic triaxial apparatus, analyzed the mechanical characteristics of liquefaction of calcareous sand in the South China Sea, and seed, Finn [4,5] and others have carried out a large number of experiments since the 1960s, and put forward the widely used simple and convenient method, which has made outstanding contributions to the study of sand liquefaction in the field of geotechnical engineering
There are many methods to distinguish sand liquefaction at home and abroad, which can be divided into traditional methods and non-traditional methods according to different ways

Summary

Introduction

With the rapid development of economy and the increasing frequency of human activities, it has brought some great influence to the activities inside the earth. Some strong destructive earthquakes have occurred all over the world, such as the 8.3 earthquake in San Francisco, USA on April 18, 1906, the 7.9 earthquake in Kanto, Japan on September 1, 1923, the 7.1 earthquake in Fukui, Japan on June 28, 1948, and the 8.0 earthquake in Wenchuan, China on May 12, 2008 After the earthquake, it has brought great damages and inconvenience to people's production and life, resulting in great economic losses and casualties. With the continuous development of modern science and technology and the application of computer big data, there is a technical support for the occurrence and prediction of earthquakes It is of great significance of the seismic research of buildings, especially for the problem of foundation soil. Liu Hanlong [3] and others have carried out a series of experimental studies on calcareous sand by using dynamic triaxial apparatus, analyzed the mechanical characteristics of liquefaction of calcareous sand in the South China Sea, and seed, Finn [4,5] and others have carried out a large number of experiments since the 1960s, and put forward the widely used simple and convenient method, which has made outstanding contributions to the study of sand liquefaction in the field of geotechnical engineering

Liquefaction judgment

Traditional discrimination method

Unconventional discrimination method

Findings

Conclusion