Experimental Research on the High Energy Level Dynamic Compaction with Humidification Operation to Collapsible Loess in the Arid Region in Northwest China
HE Shu－jun1，LI Hong－jiang1，ZHAO Min－xue2，ZHAO Wei－tao1，Wang Lan－xing2，LUO Lian－bao2，HE Wan－pu2
1. The Institute of Foundation Engineering of China Zhonhua Geotechnical Engineering Co．，Ltd，Beijing 102600，China; 2.Lanzhou Huanqiu Contracting＆Engineering Corporation，Lanzhou，Gansu 730060，China
Abstract：Research purposes:The collapsible loess in the northwest arid area is relatively dry，and its moisture content is 3 to 8% ，so it is generally believed that it is needed for humidification treatment with the energy level (below 8500kN·m) in the current specification standard to treat collapsible loess found directly because of the effect of poor compaction，relatively small effect depth． At present，it is less than that the dynamic compaction with more than high energy level(more than 10000 kN·m) to collapsible loess in the arid region in Northwest China and it is hardly reported that the high energy level dynamic compaction combined with humidification operation to collapsible loess was carried out．Therefore，Contrast testing study on 15000 kN·m high energy level dynamic compaction to collapsible loess with 15000 kN·m high energy level dynamic compaction with humidification operation in the arid region in Northwest China was performed based on the large oil storage tank projects constructed by the country on Collapsible Loess．And a suitable construction process on high energy level dynamic compaction combined with humidification operation in the northwest arid collapsible loess area will be hoped to probed．
Research conclusions:The results by testing study showed that the collapsible depth to be eliminated under 15 000 kN·m high energy level dynamic compaction to collapsible loess directly and 15 000 kN·m high energy level dynamic compaction combined with humidification operation was separately up to 10 m，15 m，its strength parameters were nearly 2 times more improvement． A suitable construction process on high energy level dynamic compaction combined with humidification operation in the northwest arid collapsible loess area was probed by this experimental study and it is a reference for similar ground treatment project．
何淑军,李鸿江,赵敏学,赵伟涛,王兰兴,罗连宝,何万普. 西北干旱湿陷性黄土区增湿高能级强夯试验研究[J]. 铁道工程学报, 2011, 28(7): 9-15.
HE Shu－jun，LI Hong－jiang，ZHAO Min－xue，ZHAO Wei－tao，Wang Lan－xing，LUO Lian－bao，HE Wan－pu. Experimental Research on the High Energy Level Dynamic Compaction with Humidification Operation to Collapsible Loess in the Arid Region in Northwest China. 铁道工程学报, 2011, 28(7): 9-15.
Wang Tiehong．A New Edition of Memoir for Foundation Treatment of Significant Engineering in China［M］．Beijing: China Architecture ＆ Building Press，2005．
Yang Tianliang，Ye Guanbao． Application Research on High Energy Level Dynamic Compaction in Collapsed Loess Foundation Treatment［J］．Journal of Yangtze River Scientific Research Institute，2008(2) : 54－57．
An Ming， Yang Yinwang． Discussion on the Reinforcement Depth of High Energy Level Dynamic Compaction in Collapsed Loess Foundation Treatment ［J］．Construction Technology，2005(S) :137－139．
Guowei，Tang kesheng．Test Study on Effective Reinforcement Depth of Collapsible Loess Foundation Improved with 12000kN·m High Energy Level Dynamic Compaction［J］．Construction Technology， 2009(S) : 16－19．
Ma Xiaowei，He lingsheng． The Experiment of Driven Cast － in － place Pile for Collapsible Loess after Dynamic Compaction［J］．Shanxi Architecture，2008 (23) :132－133．
Han Xiaolei，Xi Yajun，Shui Weihou，etc． Application and Study of Ultra － high Dynamic Compaction with 15 000 kN · m in Treatment of Collapsed Loess ［J］． Journal of Water Resources and Architectural Engineering，2009(3) : 91－93．
Zhan Jinlin，Shui Weihou．Application of High Energy Level Dynamic Compaction to Ground Improvement of Collapsible Loess for Petrochemical Project ［J］．Rock and Soil Mechanics，2009(S2) : 469－472．
Wang Yingbing，Teng Wenchuan，Zhu Yanpeng etc． Study on the Application of High Energy Level Dynamic Compaction in Thick Collapsible Loess Regions［J］． Journal of Gansu Sciences，2009(2) : 92－95．
［9］ GB 50025—2004，湿陷性黄土地区建筑规范［S］．
GB 50025—2004，Code for Building Construction in Collapsible Loess Regions［S］．
Zhang Jiwen，Qu Baijing，Wang Jun，etc．Test Study of Reinforcement Collapsible Loess Foundation with Super － energy Power Tamping ［J］．Geotechnical Investigation ＆ Surveying，2010(1) : 15－18．
Qing Baohe．Application of Strong Tamping and Its Replacement Technology in Reinforcing Composite Subgrade of Railway Passenger Dedicated Line ［J］． Journal of Rallway Engineering Society． 2007 (7) : 33－37．
Wang Tiehong，Shui Weihou，Wang Yaling． Thinking of high energy level dynamic compaction application and development． Building structure，2009(11) : 86－89．
2011, Vol. 28 
版权所有 © 2014 《铁道工程学报》编辑部