摘要
以文麻高速公路某滑坡为例,基于现场调查统计分析34条地表裂缝的发育规律,综合滑坡地形地貌、裂缝分布、深部位移监测等信息,将滑坡分为浅层Ⅰ区、浅层Ⅱ区和深层整体Ⅲ区,研究开挖诱发复杂滑坡复活的变形机理。结果表明:浅层Ⅰ区在排水设施修建之前变形明显,支护之后趋于稳定;Ⅱ区滑坡现状稳定无变形痕迹;深层滑坡监测数据显示Ⅲ区目前存在滑移迹象。稳定性计算结果表明,过高的地下水位是导致滑坡变形的主要因素,提出设置排水洞的措施,并对该滑坡孕育机理进行反演分析。
Taking the landslide along Wenshan—Mali Expressway as an example,the development laws of 34 ground fissures were analyzed on basis of field investigation and statistic.By integrating the landslide landform,the fissure distribution and the deep displacement monitoring information,the landslide was divided into shallow zone I,shallow zone II and deep zone III.The deformation mechanism of the complex landslide induced by highway excavation was studied.The result shows that the shallow zone I subjects to obvious deformation before erection of drainage facilities,and then tends to be stable after being supported;the zone II is of stable status quo without signs of deformation;and the monitoring data of deep seated landslide reveals the slip signs existing in the zone III at present.The result of stability calculation of the shallow and deep seated landslide shows that too high level of groundwater is the main factor leading to landslide deformation,therefore,the measures to set drainage culvert are put forward herein.Inverse analysis carried out on the mechanism of landslide preparation provides the geological basis for landslide division and control.
作者
王琳
毛永强
鲍洵
崔德山
WANG Lin;MAO Yongqiang;BAO Xun;CUI Deshan(CCCC(Kunming)Construction Co.,Ltd.,Kunming 650000,China;CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430040,China;China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《路基工程》
2023年第3期194-199,共6页
Subgrade Engineering
关键词
文麻高速公路
复合滑坡
变形特征分区
变形监测
地层演化
Wenshan—Mali Expressway
composite landslide
deformation characteristics division
deformation monitoring
stratigraphic evolution
