斜长花岗岩边坡稳定性研究
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摘要
在连续多日的大暴雨后,某高边坡强卸荷松动的危岩体发生了大崩塌,根据测绘和三维激光扫描,崩塌陡崖基岩裸露,岩体为斜长花岗岩,陡崖高40～80 m,延伸长度近400 m。由于该段陡崖岩体曾多次发生过不同规模的岩体崩塌,在岩壁多处出现了"凹腔","凹腔"使上部的岩体形成了倒悬状,倒悬状岩体极易顺外倾结构面和张裂隙在内、外营力作用下发生掉块和崩落。文章以这一工点为研究背景,进行了陡崖边坡稳定性分析及评价,并针对不同稳定性特征的陡崖提出了不同的治理方案,可为类似工程提供借鉴。
After several days of torrential rain,the dangerous rock mass with strong unloading and loosening on a high slope collapsed. According to surveying and mapping and three-dimensional laser scanning,the bedrock of the collapsed steep cliff with a height of 40 ～ 80 m and an extension length of nearly 400 m is bare and the rock mass is plagioclase granite. Because the steep cliff rock mass in this section has collapsed many times in different scales,the concave cavities where the upper rock mass form an inverted suspension appear in many places of the rock wall. The concave cavity made the upper rock mass form an inverted suspension. The inverted rock mass is easy to fall and collapse along the inclined structural plane and the tension crack under the action of internal and external forces. This paper,taking this construction site as the study background,carries out the stability analysis and evaluation of the steep cliff slope,and puts forward different treatment schemes for different stability characteristics of the cliff,which can provide reference for similar projects.
After several days of torrential rain,the dangerous rock mass with strong unloading and loosening on a high slope collapsed. According to surveying and mapping and three-dimensional laser scanning,the bedrock of the collapsed steep cliff with a height of 40 ～ 80 m and an extension length of nearly 400 m is bare and the rock mass is plagioclase granite. Because the steep cliff rock mass in this section has collapsed many times in different scales,the concave cavities where the upper rock mass form an inverted suspension appear in many places of the rock wall. The concave cavity made the upper rock mass form an inverted suspension. The inverted rock mass is easy to fall and collapse along the inclined structural plane and the tension crack under the action of internal and external forces. This paper,taking this construction site as the study background,carries out the stability analysis and evaluation of the steep cliff slope,and puts forward different treatment schemes for different stability characteristics of the cliff,which can provide reference for similar projects.
引文
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[3]刘佑荣.岩土力学[M].北京:中国地质大学出版社,2010.LIU Yourong. Geotechnical Mechanics[M]. Beijing:ChinaUniversity of Geosciences Press,2010.
[4] TB 10027-2012铁路工程不良地质勘察规程[S].TB 10027-2012 Regulations for Unfavorable Geology Investigation ofRailway Engineering[S].
[5]李隽蓬.铁路岩石边坡坡度确定及稳定性分析[J].铁道工程学报,2005,22(S1):348-349.LI Junpeng. Grade Determination and Stability Analysis of RailwayRock Slope[J]. Journal of Railway Engineering Society,2005,22(S1):348-349.
[6] GB 18306-2015中国地震动参数区划图[S].GB 18306-2015 Seismic Ground Motion Parameter Zonation Map ofChina[S].
[7]胡厚田.崩塌落石研究[J].铁道工程学报,2005,22(S1):387-389.HU Houtian. Research on the Collapse and Falling Stone[J]. Journalof Railway Engineering Society,2005,22(S1):387-389.
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