人工挖孔桩因其施工方便、经济节省、抗震能力强,在公路、民用建筑中得到了广泛的应用。但在低洼淤泥、流砂层较厚、地下水极为丰富的复杂条件下,很容易涌砂塌孔,施工进度缓慢或根本无法成孔,因此难以组织施工,严重的影响了工程进度。本文总结了大量软弱地基条件下施工的成功经验,以供实际工程借鉴。 Due to its convenient construction, economical digging hole, strong anti-seismic capacity, artificial digging pile has been widely used in highways and civil buildings. However, under the complex conditions of low-lying silt, thick sand layer and extremely rich groundwater, it is easy to collapse the hole and the construction progress is slow or impossible to form a hole. Therefore, it is difficult to organize the construction and seriously affect the progress of the project. This article summarizes the successful experience of construction under a large number of weak foundations for reference of practical projects.