Foundation treatment of self weight collapse loess of removal airport project
YAO Xue-gui1, YAO Zhi-hua2, ZHOU Li-xin3, LEI Yuan-feng1
1. The 7th Engineering Corps of China Airport Construction, 721000, Baoji, Shanxi, China; 2. Department of Airdrome Construction Engineering, Air force engineering university, 710038, Xi’an, China; 3.Air Force Engineering Design & Research Institute, 100068, Beijing , China
Abstract：
In order to eliminate collapsibility of self weight collapse loess of removal airport project in Yan’an and decrease sedimentation of high-fill site, some physical mechanics index of six test sites were acquired by using lime-soil (original soil) compaction pile, down-hole dynamic compaction and dynamic compaction, effectiveness of 3 kinds of foundation treatment was analyzed. The test results showed, lime-soil (original soil) can achieve the purpose of eliminating collapsibility, from an environmental and economic point, original soil compaction pile will be given the priority. Compaction coefficient of compaction pile and DDC pile basically shows that the upper and lower part of pile is small, the larger and the intermediate pile is large, while degree of compaction of the dynamic compaction decreases with the depth increasing. degree of compaction of dynamic compaction method is greater than the compaction coefficient of compaction pile and DDC pile basically. In DDC treatment area, some points are greater than 0.015, so important engineering projects should be careful using this method. From point of economy and efficiency, the dynamic compaction method is superior to the compaction pile and DDC method, the large area construction should be suggested to use dynamic compaction.
YAO Xue-gui,YAO Zhi-hua,ZHOU Li-xin et al. Foundation treatment of self weight collapse loess of removal airport project[J]. Architecture Technology, 2016, 47(3): 213-.
