| The moisture fine silt stratum, which is loose, without adherence, has poor stabilizing ability. Streaming water, running sand and collapse etc，often take place while excavating tunnel in such stratum. Therefore, the construction in the moisture fine silt stratum is a hard nut to crack. This paper introduces tunnel construction technique in non rock stratum, and in accordance with the principle of “first dewater, pipe in advance, strict grouting, short footage, strong support and early close, frequent measurement and tight lining”, introduces emphatically the dewater and excavation construction technology at slope well and intersection section in the moisture fine silt stratum. |