某桥基动力触探测试

为了查明各桥基的地层情况，确定地基承载力，作为基础设计和施工的依据，对其交通桥的桥基进行动力触探测试。测试结果表明：沿桥轴线各个钻孔的地基承载力差别很大，各钻孔沿深度方向的地基承载力也不相同，场区内主要发育着山区河床冲积物；岩土层具有清楚的层理构造，表现在剖面上两种或两种以上的沉积物交替、重复出现；除水平层理外，交错层理也很发育。因此，根据各钻孔的具体情况，合理调整基础的深度及结构，以确保临时施工交通桥的安全使用。

Dynamic penetration test on a bridge base

In order to ascertain the geologic structure and the bearing capacity of the bridge base, the dynamic penetration test was made. It was proved by the test that the bearing capacity varied along the axial line and the depth, the river wash was developed in the mountainous area, the bedding structure was distinct in the rock layer and the two or more kinds of settlings appeared repeatedly and alternatively. Therefore, to make sure the safety of temporal bridge the depth and structure of the foundation should be chosen properly.