湿陷性地区临近强夯荷载对高填方边坡压实质量的影响

The Influence of Adjacent Dynamic Compaction Load on the Compaction Quality of High Fill Slope in Collapsible Areas

为了研究临近强夯荷载作用对新建黄土高边坡压实质量的影响,结合甘肃陇东新建庆阳机场黄土边坡工程,对强夯引起高填方边坡的振动响应及其坡体密实度变化进行了现场测试试验。试验结果表明:临近强夯动荷载引起新建边坡的振动响应明显,且临近边坡坡面一定区域内具有“振动放大效应”;振动荷载引起新建黄土边坡干密度发生变化,临近坡面一定范围内填筑压实度明显降低。为保证边坡质量,强夯过程中应适当降低夯击能、临近坡面范围采用专用设备压实。

In order to study the influence of adjacent dynamic compaction load on the compaction quality of newly builtl oess high slope,in combination with the loess slope project of the newly built Qingyang Airport in Longdong,Gansu Province,this paper conducted field test on the vibration response of high fill slope caused by dynamic compaction and the change of slope compactness.The test results show that the vibration response of the newly built slope caused by dynamic loads adjacent to dynamic compaction is obvious,and there is a"vibration amplification effect"in a certain area of the slope surface adjacent to the slope.The vibration loads cause changes in the dry density of the newly built loess slope,and the degree of the filling compaction within a certain range adjacent to the slope surface reduced obviously.In order to ensure the quality of the slope,compaction energy should be properly reduced during dynamic compaction,and special equipment should be used for compaction near the slope surface.