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武汉枢纽南环铁路从武汉市东南郊的汤逊湖地区通过,该线大部分处于湖相沉积软土地区,对如何解决桥涵设计成了一个突出的课题,现将遇到的一些问题的处理和体会做一简要介绍,以供参考。一、地质概况该地区系属长江两岸内陆湖相沉积的淤泥质粘土,其主要物理力学性质为天然含水量大(W=40～70％),天然孔隙比大(e=1.0～1.7),压缩系数大(a=0.05～0.09cm~2/kgf),渗透系数小(K=1×10~(-6)～1×10~(-8)
The Wuhan South Hub Railway passes through the area of Thomson Lake in the southeastern suburbs of Wuhan City. Most of the line is in lacustrine sedimentary soft soil areas. It has become a prominent issue on how to solve the design of bridges and culverts. Nowadays, some problems encountered Experience make a brief introduction for reference. First, the geological overview The area belongs to the inland lacustrine sediments in the Yangtze River muddy clay, the main physical and mechanical properties of natural water content (W = 40 ~ 70%), natural porosity ratio (e = 1.0 ~ 1.7) The coefficient is large (a = 0.05 ~ 0.09cm ~ 2 / kgf) and the permeability coefficient is small (K = 1 × 10 -6 ~ 1 × 10 -8)