Researches On Dynamic Properties Of Silty Soil Under Subway Loading

With the rapid development of the city, city traffic is very crowded, the subway as a kind of public transport has been paid more and more attention, but the subway vibration, soil settlement and operation safety problem has been the concern of people. In this paper, taking Hangzhou subway the silt layer as the background to carry out relevant research, because the physical and mechanical properties of silty soil liquefaction or complex, the residual strength of the existing research mainly focused on the assessment of silt or sand,research very little involves the dynamic properties of silt under the vibration loading.This paper analysis in the specific gravity test, particle based test, relative density test and conventional static three axis as the indoor test, using the GDS three axis instrument on silt specimen subjected to cyclic triaxial tests on three, systematic analysis of the dynamic properties of silt in the subway traffic loads, the physical and mechanical properties of the Hangzhou subway silt silt.In considering the establishment of finite element model of subway tunnel under subway vibration load, a realistic simulation of the silt in the subway under the driving load stress field, and provides the reliable basis for the safe operation of Hangzhou metro.