柱锤强夯置换振动及侧向变形环境影响试验研究

Experimental Investigation of Vibration and Lateral Deformation for Dynamic Compaction Replacement with Column Hammer

对柱锤强夯置换进行不同能级的试验研究,在距每个试验区不同距离进行三向地面振动监测,根据监测曲线研究振动速度/加速度衰减规律,得出柱锤强夯施工振动影响安全距离;在距每个试验区不同距离埋设测斜管,在施工过程中及工后进行水平位移监测,得出不同能级、不同距离下柱锤强夯置换对地面及地下变形影响规律,提出柱锤强夯置换引起地基土变形的安全距离。

Different energy grade tests of dynamic compaction replacement with column hammer were finished.The 3-D ground vibrations were monitored in different distances from each test region.According to monitorial curves,the attenuation law between velocity and accelerated velocity was obtained.In addition,the safe radius of its construction was founded.Inclinometer tubes were inbuilt in different distances from each test area,so that the horizontal displacement can be monitored during and after construction.The affect rule of dynamic compaction replacement with column hammer to the displacement of ground and underground were deduced;meanwhile the safe deformation distance of foundation caused by dynamic compaction replacement was also proposed.