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在某大桥工程中,建造了80多根φ1.5m、长32m的钻挖桩。桥址处的地质构造为第四纪沉积层及泥盆纪岩层。在第四纪岩层上部是呈细砂和粉砂状
In a bridge project, built more than 80 φ1.5m, 32m long drilling pile. The geological structure at the site of the bridge is Quaternary sediments and Devonian strata. Quaternary rock in the upper part was fine sand and silt-like