延边高铁沿线膨胀软岩边坡变形机理分析及深部力学监测

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• 英文论文题名：Research On Deformation Mechanism of Soft Rock Slope and Monitoring of Deep Mechanics In Yanji High-speed Rail Line
• 论文作者：陶志刚 ; 宋志刚 ; 张海江 ; 彭岩岩 ; 赖豪 ; 修渴馨
• 英文论文作者：TAO Zhigang ; SONG Zhigang ; ZHANG Haijiang ; PENG Yanyan ; LAI Hao ; XIU Kexin ; State Key Laboratory for Geomechanics & Deep Underground Engineering ; School of Mechanics and Civil Engineering ; China University of Mining & Technology ; Genter of Rock Mechanics and Geoharzards ; Shaoxing University
• 年：2017
• 作者机构：深部岩土力学与地下工程国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;绍兴文理学院岩石力学与地质灾害实验中心;
• 论文关键词：膨胀土 ; 滑坡 ; 深部滑动力监测 ; 滚石治理
• 英文论文关键词：swelling soil ; landslide disaster ; deep sliding force monitoring ; control of the rolling stones
• 会议召开时间：2017-04-18
• 会议录名称：2017年第九届边坡工程大会论文集
• 语种：中文
• 分类号：U213.13
• 学会代码：ZJKC
• 会议名称：2017年第九届边坡工程大会
• 会议地点：中国浙江宁波
• 主办单位：中国建筑学会工程勘察分会
• 学会名称：中国建筑学会工程勘察分会
• 页数：11
• 文件大小：2324k
• 原文格式：D
• 会议级别：全国

摘要

我国吉林延边地区膨胀性软岩分布广泛,自上世纪80年代以来就曾发生过数起缓坡角、浅开挖膨胀性软岩边坡的滑坡和坍滑灾害。2012年延吉盆地连降暴雨,在建吉图珲高铁延吉段多处边坡发生局部坍滑破坏,造成高铁施工中断。首先,通过分析该地区膨胀软岩边坡的物理力学性质,采用数值模拟计算方法,分析不同降雨强度(I)和降雨持时(H)条件下膨胀性软岩边坡安全系数Fs的变化规律,揭示出膨胀性软岩边坡滑坡孕灾机制和发生机理;然后,针对膨胀性软岩边坡的大变形破坏特征,采用NPR恒阻大变形锚索对边坡进行加固和深部滑动力的监测预警,分析不同入射角(α)和锚固段长度(L_2)条件下膨胀性软岩边坡安全系数Fs的变化规律;最后,根据深部滑动力监测数据,证明通过NPR恒组大变形锚索加固后的膨胀性软岩边坡处于稳定状态,无滑动征兆。
The distribution of soft rock is widely extensive in Yan Bian City, Ji Lin Province. Since the 1980 s,several swelling soft rock slope landslide and collapse disasters have happened. Continuous heavy rainfall occurs in 2012, several landslides happened in Ji Tu Hun High speed rail, which lead to the interruption of the High speed rail construction. Firstly, through the analysis of physical and mechanical properties of swelling soft rock slope in the region, using numerical simulation method to analyze the transformation law of slope stability coefficient Fs under the different conditions of rainfall intensity(I) and rainfall duration(h), revealing the landslide mechanism of swelling soft rock slope; Then, according to the characteristics of large deformation of swelling soft rock slope, NPR constant-resistance large deformation cable is adopted to reinforce the slope and monitor deep sliding force, analyzing the transformation law of slope stability coefficient Fs under the different conditions of anchor angle(α) and length of anchorage section(L2). Finally,According to the monitoring data of deep sliding force, it is proved that the swelling soft rock slope stabilized by the NPR constant-resistance deformation cable is stable, and there is no sign of sliding.

引文

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