摘要
研究目的:阿尔及利亚东西高速M3标段,个别滑坡滑面及滑床为碎块石,单纯通过钻孔岩芯鉴定无法准确确定滑面,而滑面判定不准,不是造成浪费,就是造成工程失败。研究结论:(1)老滑坡体的存在、相对疏松的岩土结构是滑坡产生的前提;持续降雨入渗软化滑带土,增加土体重度;土方开挖形成高边坡且没设置恰当的支挡防护工程,从而导致岩土体自坡面剪出形成滑坡。(2)深部变形监测定量验证了该滑坡发生了多期活动,存在多层滑带土的特点,浅层滑面距离地表6.5～20.5 m,深层滑面距离地表15.5～31 m,滑面最大累计位移13 mm,滑面处最大变形速率0.42 mm/d。(3)深部变形监测对于投资受到限制、地质地层情况复杂、钻探工作难以准确界定滑面层位等情况特别适用,辅助勘察设计与后评价工作。
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.
出处
《铁道工程学报》
EI
北大核心
2012年第9期39-44,92,共7页
Journal of Railway Engineering Society
基金
中国铁建股份有限公司科技研究开发课题项目(11-09C)
中国铁建股份有限公司科技开发课题项目(11-09C)
关键词
泥灰岩
边坡
测斜仪
深部位移监测技术
滑坡处治
marlite
side slope
inclinometer
monitoring technology for deep displacement
treatment of landslide
