Model Test Research on Slope Failure Process under Slope Cutting Based on BOTDA Technology

Lei ZHANG; Bin SHI; Guangqing WEI

doi:10.13409/j.cnki.jdpme.2020.05.003

您当前的位置：

首页 >

文章列表页 >

Model Test Research on Slope Failure Process under Slope Cutting Based on BOTDA Technology

更新时间：2025-09-25

- Model Test Research on Slope Failure Process under Slope Cutting Based on BOTDA Technology
- Journal of Disaster Prevention and Mitigation Engineering Vol. 40, Issue 5, Pages: 698-705(2020)
- 作者机构：
  
  1.南京大学地球科学与工程学院，江苏南京 210023
  2.南京大学（苏州）高新技术研究院，江苏苏州 215123
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.2020.05.003
  CLC： TU443
- Received：05 July 2018，
  
  Revised：2018-12-05，
  
  Published：15 October 2020
- 稿件说明：
移动端阅览
张磊,施斌,魏广庆.基于BOTDA的削坡作用下边坡破坏过程模型试验研究[J].防灾减灾工程学报,2020,40(05):698-705.

ZHANG Lei,SHI Bin,WEI Guangqing.Model Test Research on Slope Failure Process under Slope Cutting Based on BOTDA Technology[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(05):698-705.
张磊,施斌,魏广庆.基于BOTDA的削坡作用下边坡破坏过程模型试验研究[J].防灾减灾工程学报,2020,40(05):698-705. DOI： 10.13409/j.cnki.jdpme.2020.05.003.

ZHANG Lei,SHI Bin,WEI Guangqing.Model Test Research on Slope Failure Process under Slope Cutting Based on BOTDA Technology[J].Journal of Disaster Prevention and Mitigation Engineering,2020,40(05):698-705. DOI： 10.13409/j.cnki.jdpme.2020.05.003.

摘要

在众多诱发滑坡的因素中，人工削坡引发的边坡失稳现象十分普遍。采用布里渊光时域分析技术（以下简称BOTDA技术），通过模型试验和数值模拟分析，对削坡作用下的边坡变形机理及其演化过程进行了研究。由于传感光缆与土体之间的耦合性直接影响着监测结果的准确性，首先通过不同围压作用下的拉拔试验，掌握了传感光缆与土体耦合变形关系。然后，设计了坡顶加载试验模型，通过在水平向和竖直向植入传感光缆，实现对边坡模型在削坡作用下土体内部变形场的分布式监测。试验结果表明：水平和竖直向传感光缆监测到的应变异常区域与潜在滑动面位置相吻合，并被数值模拟所证实；在BOTDA监测数据的基础上提出了边坡模型水平特征最大应变值与安全系数之间的经验公式，对削坡作用下的边坡稳定性状态进行了评价，进而可对边坡失稳做出预警。

Abstract

Among other factors， artificial slope cutting is one of the most common triggering factors of landslide. In this paper， a series of model tests and numerical simulation have been conducted to investigate the failure mechanism and evolution process of the slope under slope cutting. As the coupling between sensing cables and soil directly affects the accuracy of monitoring results. Firstly， a new pull-out apparatus is designed and the coupling deformation relationship between sensing cables and soil is acquired through pull-out tests under different confining pressures. According to the pull-out tests， a surcharge loading test model was designed. Strain-sensing cables that can capture the strains at different positions of the model slope were embedded in the soil mass. The measurement data of the cut slope were analyzed. It can be found that an abnormal strain-field area obtained by horizontal and vertical sensors coordinated with the location of the potential slip surface. This is verified by a comparison between the measurements of the cables and numerical simulation results. Based on the BOTDA data， an empirical relationship is explored between the horizontal characteristic maximum strain and the safety factor to estimate the slope stability condition and perform early-warning of landslide under the action of slope cutting. The conclusions drawn in this study are of great significance to stability evaluation of artificial cut slopes.

关键词

Keywords

references

Petley D . Global patterns of loss of life from landslides ［J］. Geology ， 2012 ， 40 （ 10 ）： 927 - 930 .

王静，施斌，严珺凡，等 . 基于光纤光栅传感器的灾变滑坡模型试验研究［J］. 工程地质学报， 2012 ， 20 （增）： 810 - 815 .

Wang J ， Shi B ， Yan J F ， et al . Model test of landslides catastrophe based on fiber bragg grating sensors ［J］. Journal of Engineering Geology ， 2012 ， 20 （ Sup）： 810 - 815 . （in Chinese）

张帆宇，白世彪，刘高，等 . 兰临高速公路袁家湾段切坡开挖失稳过程及其机理［J］. 工程地质学报， 2009 ， 17 （ 1 ）： 81 - 87 .

Zhang F Y ， Bai Sh B ， Liu G ， et al . Process and mechanism of cut slope instability at Yuanjiawan section of Lan-Lin expressway ［J］. Journal of Engineering Geology ， 2009 ， 17 （ 1 ）： 81 - 87 . （in Chinese）

Morse M S ， Lu N ， Wayllace A ， et al . Experimental test of theory for the stability of partially saturated vertical cut slopes ［J］. Journal of Geotechnical & Geoenvironmental Engineering ， 2014 ， 140 （ 9 ）： 04014050 .

高俊启，施斌，张巍，等 . 分布式光纤传感器用于桥梁和路面的健康监测［J］. 防灾减灾工程学报， 2005 ， 25 （ 1 ）： 14 - 19 .

Gao J Q ， Shi B ， Zhang W ， et al . Application of distributed fiber optic sensors to bridge and pavement health monitoring ［J］. Journal of Disaster Prevention and Mitigation Engineering ， 2005 ， 25 （ 1 ）： 14 - 19 . （in Chinese）

Iten M ， Puzrin A M ， Schmid A . Landslide monitoring using a road-embedded optical fiber sensor ［J］. PSPIE The 15 th International Symposium on： Smart Structures and Matericals & Nondestructive Evaluation and Health Monitoring. San Diego ， California ， USA：［ s.n .］， 2008 .

王宝军，李科，施斌，等 . 边坡变形的分布式光纤监测模拟试验研究［J］. 工程地质学报， 2010 ， 18 （ 3 ）： 325 - 332 .

Wang B J ， Li K ， Shi B ， et al . Simulation experiment for distributed fiber monitoring on deformation of soil slope ［J］. Journal of Engineering Geology ， 2010 ， 18 （ 3 ）： 325 - 332 . （in Chinese）

Hauswirth D ， Iten M ， Richli R ， et al . Fibre optic cable and micro-anchor pullout tests in sand ［C］//Proceedings of the 7th International Conference on Physical Modelling in Geotechnics， Zurich， Switzerland：［s.n.］， 2010 .

张诚成，施斌，刘苏平，等 . 钻孔回填料与直埋式应变传感光缆耦合性研究［J］. 岩土工程学报， 2018 ， 40 （ 11 ）： 1 959 - 1 967 .

Zhang Ch Ch ， Shi B ， Liu S P ， et al . A study of the mechanical coupling between borehole backfill and fiber-optic strain-sensing cable ［J］. Chinese Journal of Geotechnical Engineering ， 2018 ， 40 （ 11 ）： 1 959 - 1 967 . （in Chinese）

Zhu H H ， Shi B ， Zhang J ， et al . Distributed fiber optic monitoring and stability analysis of a model slope under surcharge loading ［J］. Journal of Mountain Science ， 2014 ， 11 （ 4 ）： 979 - 989 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Stability Analysis of High‑fill Subgrade of Xinjiang Gobi Gravel Soil under Static Loading

Experimental Study on Dynamic Response of Upper Orthogonal Comprehensive Utility Tunnel under Subway Vibration

Model Tests on The Bearing Capacity of Modified Suction Caisson under Inclined Pullout Loading

Study on Influencing Factors of Deformation of Snowflake Shaped Steel Sheet Pile

Experimental Study on Vertical Bearing Capacity of Conical Composite Piles

Related Author

WEI Xia

DING Jianwen

GAO Pengju

SUN Shuai

DUAN Xu

XIAO Di

LIU Wuchao

DONG Qi

Related Institution

School of Transportation, Southeast University

Shaanxi Science & Technology Holding Group Co., Ltd.

China DK Comprehensive Investigate and Design Research Institute Co., Ltd.

School of Architecture and Civil Engineering, Xi'an University of Science and Technology

College of Civil Engineering, Fuzhou University

⁰