降雨条件下软岩边坡渗流-软化分析方法及其灾变机制

›› 2014, Vol. 35 ›› Issue (1): 197-203.

降雨条件下软岩边坡渗流-软化分析方法及其灾变机制

谢瑾荣^{1, 2}，周翠英²，程晔²

1. 中交第四航务工程勘察设计院有限公司，广州 510230；2. 中山大学工学院，广州 510275

收稿日期:2013-07-24 出版日期:2014-01-10 发布日期:2014-01-14
通讯作者: 程晔，男，1974年生，博士，讲师，主要从事岩土工程方面的研究工作。E-mail: chengye0515@126.com E-mail:Jeron1988@foxmail.com
作者简介:谢瑾荣，男，1988年生，硕士，主要从事道路与铁道工程方面的研究工作。
基金资助:
国家自然科学基金资助(No. 40672194)；中央高校基本科研业务费专项资金资助(No. 11lgpy04)

Method of seepage-softening analysis and disaster mechanism in soft rock slope under rainfall

XIE Jin-rong^{1, 2}，ZHOU Cui-ying²，CHENG Ye²

1. Fourth Harbor Engineering Investigation and Design Institute, Co., Ltd., China Communications Construction Company, Guangzhou 510275, China; 2. School of Engineering, Sun Yat-sen University, Guangzhou 510275, China

Received:2013-07-24 Online:2014-01-10 Published:2014-01-14

摘要/Abstract

摘要： 降雨条件下软岩边坡的灾变问题是滑坡领域研究的热点与难点。采用间接耦合法进行软岩边坡降雨入渗分析，根据软岩边坡非饱和渗流-应力计算原理，建立了软岩边坡渗流效应分析方法；将软岩抗剪强度的遇水软化特征动态赋予暂态饱和区中对应的软岩体，模拟降雨渗流条件下软岩边坡的软化效应；将渗流与软化相结合，建立基于暂态饱和区的软岩边坡降雨-渗流-软化-灾变的数值分析方法，并用于实例边坡的降雨灾变机制分析。结果显示，软岩边坡潜在滑动面深度随时间逐渐变浅，安全系数-时程曲线呈反向复曲线形态，当边坡开始软化时曲线上出现拐点。边坡稳定性计算结果与实际情况基本相符，表明思路与方法具有一定正确性，可为软岩边坡治理方案设计提供理论依据。

关键词: 软岩边坡, 降雨, 暂态饱和区, 渗流, 软化

Abstract: Soft rock slope engineering catastrophic mechanism is a hot difficult subject in slope engineering. According to soft rock slopes unsaturated seepage-stress calculation principles, indirect coupling method is used to analyze soft rock slope stability under rainfall infiltration. A method for analyzing seepage effect has been established. The water-softening characteristics of the shear strength of soft rock are given to the corresponding soft rock in transient saturated zone dynamically, simulating the softening effect of soft rock slope in rainfall seepage. Then, combining seepage and softening, a numerical analysis method for soft rock slope rainfall-seepage-softening-cataclysm analysis has been established based on transient saturation region, which is used to research the disaster mechanism of the slope engineering. The results show that, the depth of the potential sliding surface shallow gradually over time; the shape of stability factor-time curve is reverse recovery curve; and the inflection point appears on the curve when the slope begins to soften. The slope stability calculation results are consistent with the actual situation, so as to show that the proposed thought and method have some validity and can provide a theoretical basis for soft rock slope management program design.

Key words: soft rock slope, rainfall, transient saturated zone, seepage, softening

中图分类号:

TU 452

谢瑾荣，周翠英，程晔，. 降雨条件下软岩边坡渗流-软化分析方法及其灾变机制[J]. , 2014, 35(1): 197-203.

XIE Jin-rong ，ZHOU Cui-ying ，CHENG Ye，. Method of seepage-softening analysis and disaster mechanism in soft rock slope under rainfall[J]. , 2014, 35(1): 197-203.

参考文献

相关文章 15

[1]	苏永华, 李诚诚. 强降雨下基于Green-Ampt模型的边坡稳定性分析[J]. 岩土力学, 2020, 41(2): 389-398.
[2]	张善凯, 冷先伦, 盛谦, . 卢氏膨胀岩湿胀软化特性研究[J]. 岩土力学, 2020, 41(2): 561-570.
[3]	刘成禹, 陈博文, 罗洪林, 阮家椿, . 满流条件下管道破损诱发渗流侵蚀的试验研究[J]. 岩土力学, 2020, 41(1): 1-10.
[4]	刘忠玉, 夏洋洋, 张家超, 朱新牧. 考虑Hansbo渗流的饱和黏土一维弹黏塑性固结分析[J]. 岩土力学, 2020, 41(1): 11-22.
[5]	夏才初, 喻强锋, 钱鑫, 桂洋, 庄小清. 常法向刚度条件下岩石节理剪切−渗流特性试验研究[J]. 岩土力学, 2020, 41(1): 57-66.
[6]	李翻翻, 陈卫忠, 雷江, 于洪丹, 马永尚, . 基于塑性损伤的黏土岩力学特性研究[J]. 岩土力学, 2020, 41(1): 132-140.
[7]	支永艳, 邓华锋, 肖瑶, 段玲玲, 蔡佳, 李建林. 微生物灌浆加固裂隙岩体的渗流特性分析[J]. 岩土力学, 2019, 40(S1): 237-244.
[8]	刘丽, 吴羊, 陈立宏, 刘建坤, . 基于数值模拟的湿润锋前进法测量精度分析[J]. 岩土力学, 2019, 40(S1): 341-349.
[9]	王伟, 陈国庆, 郑水全, 张广泽, 王栋, . 考虑张拉-剪切渐进破坏的边坡矢量和法研究[J]. 岩土力学, 2019, 40(S1): 468-476.
[10]	陈宇龙, 内村太郎, . 基于弹性波波速的降雨型滑坡预警系统[J]. 岩土力学, 2019, 40(9): 3373-3386.
[11]	许江, 邬君宇, 刘义鑫, 雷娇, . 不同充填度下岩体剪切−渗流耦合试验研究[J]. 岩土力学, 2019, 40(9): 3416-3424.
[12]	刘伟俊, 张晋勋, 单仁亮, 杨昊, 梁辰, . 渗流作用下北京砂卵石地层多排管局部水平冻结体温度场试验[J]. 岩土力学, 2019, 40(9): 3425-3434.
[13]	黄晓虎, 雷德鑫, 夏俊宝, 易武, 张鹏, . 降雨诱发滑坡阶跃型变形的预测分析及应用[J]. 岩土力学, 2019, 40(9): 3585-3592.
[14]	李博, 黄嘉伦, 钟振, 邹良超, . 三维交叉裂隙渗流传质特性数值模拟[J]. 岩土力学, 2019, 40(9): 3670-3768.
[15]	周翠英, 黄思宇, 刘镇, 陆仪启, . 红层软岩软化的界面过程及其动力学模型[J]. 岩土力学, 2019, 40(8): 3189-3196.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed