Jiaxing area belongs to representative lacustrine plain zone. Its Quaternary period stratum has several evident sediment cycles "soft to hard".
嘉兴地区为典型的湖积平原，第四系地层具有多个明显“软-硬”交替的沉积旋回。
2
At the same time, the tunnel intersperses in stratum soft and hard interacted, and is very likely to collapse, which will result in greater impact on the tunnel construction and future operations.
同时隧道在软硬交互地层穿插，极易造成隧道塌方，对隧道施工和今后的运营都会造成较大影响。
3
It was found that the relative hard strata not only formed horizontally but also vertically; and the vertical stratum has a relationship to the hydrodynamics.