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| 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 |
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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．
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Received: 10 May 2011
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| Cite this article: |
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HE Shu－jun,LI Hong－jiang,ZHAO Min－xue, et al. Experimental Research on the High Energy Level Dynamic Compaction with Humidification Operation to Collapsible Loess in the Arid Region in Northwest China[J]. 铁道工程学报, 2011, 28(7): 9-15.
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| URL: |
| http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2011/V28/I7/9 |
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2011, Vol. 28 
