振动衰减测试方法确定高能级强夯对已有建(构)筑物的影响距离

某大型新建工程场地为近期吹砂填海方式形成,根据有关资料及勘察揭露,上部吹填层及原有细砂层存在地震液化及承载能力差的问题,设计采用高能级强夯进行处理。在地基处理区域处有一道永久防浪堤,根据设计要求,在进行强夯试夯过程中应采用一定的方法对振动影响进行测试,为设计提供相应的数据,进而确定强夯施工的范围。为解决上述问题,采用了振动衰减测试方法进行了强夯振动影响测试,对后期的大面积强夯施工提供了支持。通过该工程实例,介绍了振动衰减测试及其测试结果分析的方法。

Influence Distance of High-energy Level Dynamic Compaction to Existed Building Determined by Vibration Attenuation Test

The paper introduced a large newly built engineering site, which was formed by filling sand for sea reclamation in the recent. The investigation exposed that there were earthquake liquefaction and low bearing capacity in the upper formation, high-energy compaction was planed for treatment; and the safe distance should be determined to avoid the vibration influence to the existed permanent breakwater by testing. The vibration attenuation test was adopted to have dynamic compaction vibration test to support the late large-scale compaction construction. The vibration attenuation test and the test result analysis were illustrated with the engineering case.