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| Application of Monitoring Technology for Deep Displacement in Treatment of Landslide of Algeria East － West Highway |
| SHI Dan |
| China Civil Engineering Construction Corporation，Beijing 100038，China |
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Abstract Research purposes:As the sliding surface and sliding bed of one or two landslides in the bidding M3 section of the Algeria East － West Highway Project were formed of gravel，it was difficult to confirm the position of sliding surface by identifying and analyzing the drill core．If the position of sliding surface can not be correctly judged，it will cause the waste of the engineering cost or make the project unsuccessful．
Research conclusions:(1) The existence of the old landslide mass and the relative loose earth structure were the premises of the landslide happening of landslide． As the landslide soil was weakened by seepage of the continuous rainfall，the weight of soil body increased． The high slope was formed by the earth excavation without taking the appropriate supporting measures． All these factors caused landslides when the rock and earth mass arised from the slide plane．(2) The monitoring of the deep displacement quantitatively verified that this landslide had been movable in many times with the characteristics of multilayer landslide soil． The shallow slide plane was 6.5 － 20.5 m away from the earth surface; and the deep slide plane was 15.5 － 31 m away from the earth surface． The total displacement of slide plane was 13m and the maximum deformation rate of the slide plane was 0.42 mm per day．(3) The monitoring technology for deep displacement was particularly available for the cases that the investment was limited，the geological formation was complicated and the position of sliding surface was difficult to be judged by drilling． It would play a more and more important role in the security monitoring and evaluation of the treatment effect to assist the survey and design of landslide treatment．
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Received: 07 February 2012
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Han Xin． Research on Engineering Geologic Investigation of Algeria East － West Highway［J］．Journal of Railway Engineering Society，2012(1) : 11－16．
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Cai Qinge，Zhao Dong． The Application of Deep Displacement Monitoring Technology in the Treatment of Tibet Landslide［J］．Journal of Northwest University (Natural Science Edition) ，2010(6) :167－170．
［5］ 中交第一公路勘察设计研究院有限公司． 阿尔及利亚东西高速公路 M3 标段 RPK 144 +740 － PK 145 +157 段滑坡工程地质勘察报告［R］．西安: 中交第一公路勘察设计研究院有限公司，2009．
CCCC First Highway Consultants Co．Ltd．Engineering Geological Investigation Report on Landslide of Lot M3 RPK 144 + 740 － PK 145 + 157 Algeria East － West Highway Project［R］． Xi ＇an: CCCC First Highway Consultants Co． Ltd，2009．
［6］ 怀超，刘卫民，尉学勇． 阿尔及利亚东西高速公路土钉墙设计［J］．西北大学学报(自然科学版) ，2011(6) :223－226．
Huai Chao，Liu Weimin，Wei Xueyong． The Desin of Soil Nailing Wall of Algeria of East － West Highway ［J］． Journal of Northwest University( Natural Science Edition) ，2011(6) : 223－226．
［7］ 中交第一公路勘察设计研究院有限公司． 阿尔及利亚东西高速公路 M3 标段 RPK 144 +740 － PK 145 +157 段滑坡处治工程报告［R］．西安: 中交第一公路勘察设计研究院有限公司，2009．
CCCC First Highway Consultants Co． Ltd． Treatment Design Report on Landslide of Lot M3 RPK 144 + 740 － PK 145 + 157 Algeria East － West Highway Project ［R］． Xi＇an: CCCC First Highway Consultants Co． Ltd， 2009．
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2012, Vol. 29 
