|本期目录/Table of Contents|

[1]马淑芝,刘小浪,席人双,等.开挖对顺向岩质高边坡稳定性影响及锚索加固效果分析[J].地球科学与环境学报,2018,40(05):637-644.
　MA Shu-zhi,LIU Xiao-lang,XI Ren-shuang,et al.Analysis of the Influence of Excavation on Stability of High Lithological Bedding Slope and the Reinforcement Effect of Anchor Cable[J].Journal of Earth Sciences and Environment,2018,40(05):637-644.
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开挖对顺向岩质高边坡稳定性影响及锚索加固效果分析(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第40卷
期数:
2018年第05期
页码:
637-644
栏目:
工程地质
出版日期:
2018-09-15

文章信息/Info

Title:
Analysis of the Influence of Excavation on Stability of High Lithological Bedding Slope and the Reinforcement Effect of Anchor Cable
文章编号:
1672-6561(2018)05-0637-08
作者:
马淑芝; 刘小浪; 席人双; 王哲
1.中国地质大学(武汉)工程学院，湖北 武汉 430074； 2.中铁第四勘察设计院集团有限公司道路交通设计研究院，湖北 武汉 430063
Author(s):
MA Shu-zhi;  LIU Xiao-lang;  XI Ren-shuang;  WANG Zhe
1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, Hubei, China; 2. Research Institute of Railway and Traffic Design, China Railway SIYUAN Survey and Design Group Co., Ltd, Wuhan 430063, Hubei, China
关键词:
岩体力学; 岩质边坡; 稳定性; Sarma法; 加固; 开挖卸荷; 锚索; 高速公路
Keywords:
rock mass mechanics;  lithological slope;  stability;  Sarma method;  reinforcement;  excavation unloading;  anchor cable;  expressway
分类号:
P642；U416.1+4
DOI:
-
文献标志码:
A
摘要:
顺向岩质高边坡的稳定性通常较差，在工程上格外受到重视，利用锚索锚固是较为理想的加固方案。利用Sarma法对厦沙高速公路某段石英片岩顺向岩质高边坡在施加锚索和不加锚索两种工况下的应力特征和边坡稳定性系数进行对比分析。结果表明：不加锚索时，各条块底面正压力随开挖过程呈降低趋势，越靠近边坡顶部，各条块底面正压力受到开挖卸荷的影响越大，降低趋势越明显；条块底面正压力的降低使边坡抗滑力减小，当减小幅度较大时，边坡稳定性会受到明显影响，整个开挖过程中边坡整体稳定性系数呈下降趋势，最低为1.243；施加锚索能够增大条块底面正压力，提高条块底面的抗滑力，有效降低条块底面受到的剪切力，限制上部条块的滑动趋势，减小其对下部条块的挤压和相对错动，且随着开挖的加深，这种效应表现得越明显；对某个条块而言，施加锚索可以提高底面抗剪强度，降低底面和侧面剪切力、条块下滑力，从而提高边坡稳定性；施加锚索后边坡稳定性系数提高到1.630。综上所述，边坡开挖对于顺向岩质高边坡稳定性影响很大，而施加锚索加固可以显著提高边坡稳定性，达到加固边坡的目的。
Abstract:
The stability of high lithological bedding slope is usually poor, and it pays extra attention in the engineering practice, and anchor cable is an ideal reinforcement scheme. The Sarma method was applied to compare the stress characteristics and the slope stability coefficient of quartz schists in high lithological bedding slope of Xia-Sha expressway with and without anchor cable. The results show that the positive pressure of each slice bottom decreases with the excavation process without anchor cable, and the closer to the top of the slope, the greater the positive pressure of each slice is subjected to excavation unloading, and the more obvious the decreasing trend; the decrease of the positive pressure at the slice bottom decreases the sliding resistance force of the slope, and when the reduction is large, the slope stability will be significantly affected, and the stability coefficient of the slope decreases with a minimum of 1.243 during the whole excavation process; the positive pressure at the slice bottom increases with anchor cable, the sliding resistance force at the slice bottom can be improved, and the shear stress at the slice bottom also decreases, the sliding trend of the slice top can be limited, the extrusion and relative dislocation of the slice lower part are reduced, these above phenomena appear more obviously with the deepening of the excavation; furthermore, when the shear strength at the slice bottom is improved with anchor cable, the shear stresses of the slice bottom and side are reduced, and the sliding force of the slice is reduced, the purpose of slope reinforcement is achieved with the stability coefficient of 1.630. In conclusion, the slope excavation has great influence on the stability of the high lithological bedding slope, and the reinforcement with anchoring measures can significantly improve the stability of the slope and achieve the purpose of slope reinforcement.

参考文献/References:

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相似文献/References:

[1]熊炜,范文,邓龙胜,等.基于有限元修正节理岩质边坡稳定性计算的解析解[J].地球科学与环境学报,2011,33(03):306.
　XIONG Wei,FAN Wen,DENG Long-sheng,et al.Amendment of Analytical Solution on Stability of Joint Rock Slope Based on Finite Element Method[J].Journal of Earth Sciences and Environment,2011,33(05):306.
[2]何青峰,赵法锁,马旭彦,等.CSMR分级方法在边坡工程中的应用[J].地球科学与环境学报,2007,29(02):196.
　HE Qing-feng,ZHAO Fa-suo,MA Xu-yan,et al.Application of CSMR Classification in Slope Engineering[J].Journal of Earth Sciences and Environment,2007,29(05):196.
[3]查俊,阎长虹,许宝田,等.岩坡稳定性优势面分析法 ———以太湖度假区休体公园渔洋山边坡为例[J].地球科学与环境学报,2005,27(03):38.
　ZHA Jun,YAN Chang-hong,XU Bao-tian,et al.Stability analysis in rock slope by preferred plane theory Base on stability evaluation of rock slope in Yuyang Mount rest park Tai Lake vocation village[J].Journal of Earth Sciences and Environment,2005,27(05):38.

备注/Memo

备注/Memo:
收稿日期:2018-03-18;修回日期:2018-06-12
基金项目:国家自然科学基金项目(41572278)
作者简介:马淑芝(1974-),女,回族,安徽砀山人,教授,工学博士,E-mail:maszyy@163.com。
更新日期/Last Update: 2018-10-01