软基勘探主要指土层、砂层与砂砾石层的勘探。一、土层钻进如果认为螺旋钻、勺钻就能应付土层的钻进,那实在是一种偏见。土层因生成条件与结构组成的差异,其物理力学性质差异很大。砾石类土、砂类土、高塑性土、中塑性土、低塑性土以及有机土(淤泥类土),它们中含砾石、砂与粘土颗粒不同的含量,水份的含量不同,使得它们 Soft foundation exploration mainly refers to the exploration of soil layer, sand layer and gravel layer. First, the soil drilling If you think of auger, spoon drill will be able to cope with the drilling of soil, that is really a prejudice. Due to the difference of formation conditions and structure, the soil physical and mechanical properties vary greatly. Gravel soil, sand soil, high plasticity soil, medium plasticity soil, low plasticity soil and organic soil (silt soil), which contain gravel, sand and clay particles of different content, moisture content, making them