基于强度折减法的顺层路堑边坡土钉墙支护结构稳定性分析

›› 2008, Vol. 29 ›› Issue (S1): 417-420.

基于强度折减法的顺层路堑边坡土钉墙支护结构稳定性分析

周太全，华渊

江南大学环境与土木工程学院，江苏无锡 214122

收稿日期:2008-07-25 出版日期:2008-11-11 发布日期:2016-04-15
作者简介:周太全，男，1976年生，博士，副教授，主要从事桥梁与隧道工程、岩土力学等方面教学科研工作

Stability analysis of layered cutting slope soil nailing support structure based on strength reduction method

ZHOU Tai-quan, HUA Yuan

School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China

Received:2008-07-25 Online:2008-11-11 Published:2016-04-15

摘要/Abstract

摘要： 将非线性有限元分析和极限分析相结合形成强度参数折减有限元法，可以灵活地分析强度不均匀顺层路堑边坡支护结构稳定性问题。将岩体力学理论、非线性有限元分析技术和强度折减系数法相结合，对顺层岩体路堑边坡稳定性进行分析。在对密集假设节理有限元模拟中，假设节理在岩体内连续分布，采用连续介质力学方法建立密集分布节理岩体材料模型。采用强度折减系数法计算岩体结构安全系数，建议采用给定的岩体强度参数计算节理岩质边坡开挖、支护完毕后的内力，再逐渐降低岩体强度参数进行岩体边坡非线性有限元分析，直至岩体边坡达到极限状态，从而求出岩质边坡安全系数。采用该方法对渝怀铁路梅江河右岸DK409+989.4～DK410+020段顺层路堑边坡土钉墙支护结构稳定性进行分析，分析结果表明：采用土钉墙支护后的节理边坡塑安全系数为2.3，支护后的岩质边坡处于稳定状态；土钉墙潜在破裂面为岩体弹性区和塑性区的交界面，与测试得到的各排土钉拉力最大值位置一致。

关键词: 节理岩体, 岩体结构, 岩质边坡, 稳定性分析, 强度折减系数, 非线性有限元

Abstract: The rock mass structure of jointed rock slope dominates the slope deformation and stability. To assure the safety of the layered rock slope, the analysis method combined the rock mechanics theory, nonlinear finite element analysis and strength reduction factor method is proposed to analyze the stability of the jointed rock slope by using soil nailing structure. In the nonlinear finite element modeling for jointed rock slope with dense joints, assuming the joints distribute evenly in the rock, dense distribution jointed rock material model is established based on continuum mechanics theory. The improved safety factor calculation method for jointed rock slope stability using strength reduction method is proposed. It is suggested to calculate the internal forces of rock slope excavation and after supporting by using given rock mass strength parameters. Then the nonlinear finite element analysis is performed for the constructed rock with the slope rock mass strength parameter decreases gradually. Safty coefficient is obtained till the limit state of rock slope is achieved. The stability of the soil nailing support structure for DK409+989.4~DK410+020 of Yuhuai Railway at right side of Meijiang River is performed by using strength reduction method. The result shows that the safety coefficient of jointed rock slope is 2.3, which indicates that the rock slope is in stable state. The potential failure surface for the soil nailing slope is consistent with the measured maximum tensile stress for the soil nailing, which is also the interface between the elastic zone and the plastic zone.

Key words: jointed rock mass, rock mass structure, rock slope, stability analysis, strength reduction coefficient, nonlinear finite elements

中图分类号:

TU 452

周太全，华渊. 基于强度折减法的顺层路堑边坡土钉墙支护结构稳定性分析[J]. , 2008, 29(S1): 417-420.

ZHOU Tai-quan, HUA Yuan. Stability analysis of layered cutting slope soil nailing support structure based on strength reduction method[J]. , 2008, 29(S1): 417-420.

参考文献

相关文章 15

[1]	朱仁杰, 车爱兰, 严飞, 文海, 葛修润, . 含贯通性结构面岩质边坡动力演化规律[J]. 岩土力学, 2019, 40(5): 1907-1915.
[2]	柯志强, 王环玲, 徐卫亚, 林志南, 吉华, . 含横向节理的柱状节理岩体力学特性试验研究[J]. 岩土力学, 2019, 40(2): 660-667.
[3]	孙钱程, 郑民总, 李邵军, 郭浩森, 程远, 裴书锋, 江权, . 柱状节理岩体隧洞松弛深度的变异特性与确定方法[J]. 岩土力学, 2019, 40(2): 728-736.
[4]	秦雨樵，汤华，冯振洋，尹小涛，王东英, . 基于聚类分析的边坡稳定性研究[J]. , 2018, 39(8): 2977-2983.
[5]	蒋水华，刘贤，姚池，杨建华，黄劲松，江先河，. 低概率水平岩质边坡系统可靠度分析[J]. , 2018, 39(8): 2991-3000.
[6]	肖国峰，陈从新. 岩质块体渐进破坏的稳定分析方法[J]. , 2018, 39(8): 3001-3010.
[7]	卞康，刘建，胡训健，李鹏程，陈玲朱，刘振平, . 含顺层断续节理岩质边坡地震作用下的破坏模式与动力响应研究[J]. , 2018, 39(8): 3029-3037.
[8]	许明，唐亚锋，刘先珊，罗斌，唐道勇，. 自适应锚索锚固岩质边坡地震动力响应分析[J]. , 2018, 39(7): 2379-2386.
[9]	李清川，李术才，王汉鹏，张红军，张冰，张玉强,. 上覆流沙层隧道开挖面稳定性分析与数值试验研究[J]. , 2018, 39(7): 2681-2690.
[10]	孔洋，朱珍德，阮怀宁, . 三向应力作用下节理岩体渗流-应力耦合特性[J]. , 2018, 39(6): 2008-2016.
[11]	周勇，王旭日，朱彦鹏，李京榜，蒋小奎,. 强风化软硬互层岩质高边坡监测与数值模拟[J]. , 2018, 39(6): 2249-2258.
[12]	张海涛，罗先启，沈辉，毕金锋. 基于矢量和的滑面应力抗滑稳定分析方法[J]. , 2018, 39(5): 1691-1698.
[13]	贾曙光，金爱兵，赵怡晴, . 无人机摄影测量在高陡边坡地质调查中的应用[J]. , 2018, 39(3): 1130-1136.
[14]	李宁，郭双枫，姚显春,. 再论岩质高边坡稳定性分析方法[J]. , 2018, 39(2): 397-406.
[15]	李韬，徐奴文，戴峰，李天斌，樊义林，李彪，. 白鹤滩水电站左岸坝肩开挖边坡稳定性分析[J]. , 2018, 39(2): 665-674.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed