（福建省厦门市公路局，厦门 361009）

［摘要］通过对某填海工程吹填砂地基进行强夯处理的现场试验，对夯坑沉降及夯点周围地表变形、场地平均沉降量、孔压的增长和消散、强夯振动等进行监测，然后采用载荷试验，重型动力触探（N_63.5）、标准贯入、瑞利波波速测试等原位测试方法对地基的加固效果进行评价，在此基础上，给出了地基强夯参数，以供指导施工。通过试验研究可以了解强夯对提高吹填砂地基承载力的效果、孔隙水的响应规律、地基的振动影响等，有利于揭示强夯加固砂地基的特性，为我国沿海地区的“填海造地”工程提供了经济有效的地基处理方法和经验。

［关键词］强夯；地基处理；试验研究

Experimental study on backfill sand foundation by dynamic compaction

Shi Youzhi

(Xiamen Highway Bureau, Xiamen 361009，China)

Abstract:According to backfill sand foundation of large reclaimed land from sea，a series of dynamic compaction tests were performed. Settlement and ground deformation around ramming points, average settlement of fields, pore water pressures and vibration were monitored， and compaction effectiveness was in-situ tested by load test, heavy duty dynamic penetration test, SPT and Rayleigh wave test. The consolidation effect of foundation after impact was evaluated. Finally, the reasonable impact compaction parameters were recommended. In addition, the property of backfill sand foundation by dynamic compaction can be explained, such as bearing capacity of foundation, the vibration of pore water pressure, the vibration produced by heavy tamping and its influence on environment. It will be propitious to sea reclamation engineering.

Keywords:dynamic compaction; ground treatment; experimental study