苏州、无锡位于江南水网地区,城区河道纵横,暗浜、暗塘较多。土层地质剖面,上部一般有一层较厚的软弱土层,底部为粘土或亚粘土、轻亚粘土。软弱土层由上部为砖块瓦砾的杂填土(局部为素填土),厚度1～3m,最大可达5m,和下部为流塑～软塑状态的淤泥或淤泥质粘土构成。软弱土层的总厚度一般为3～4m,最厚可达6～8m。 Suzhou and Wuxi are located in the water network area in the south of the Yangtze River. There are many river channels in the city, including dark and dark ponds. In the soil geological section, the upper part generally has a thick layer of soft soil, and the bottom is clay or sub-clay and light sub-clay. The soft soil layer is composed of an upper part of a rubble (partially prime fill) of brick rubble, with a thickness of 1 to 3 m and a maximum of 5 m, and the lower part is composed of a silt or silt clay in a flow-soft plastic state. The total thickness of soft soil layer is generally 3 ~ 4m, the maximum thickness of up to 6 ~ 8m.