Destruction mechanism of sand-covered karst collapse in Guangzhou

LIAO Jing; TIAN Jiayi; GAO Yan; WANG Yizhao; YUAN Quan; JIANG Yuchao

doi:10.13471/j.cnki.acta.snus.ZR20240078

您当前的位置：

首页 >

文章列表页 >

Destruction mechanism of sand-covered karst collapse in Guangzhou

Research articles | 更新时间：2024-11-07

- Destruction mechanism of sand-covered karst collapse in Guangzhou
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 63, Issue 5, Pages: 38-47(2024)
- 作者机构：
  
  1.广州地铁设计研究院股份有限公司，广东广州 510010
  2.中山大学地球科学与工程学院，广东珠海 519082
  3.南方海洋科学与工程广东省实验室（珠海），广东珠海 519082
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.ZR20240078
  CLC： P642.25
- Published：25 September 2024，
  
  Published Online：13 July 2024，
  
  Received：22 March 2024，
  
  Accepted：16 April 2024
- 稿件说明：
移动端阅览
廖景,田嘉逸,高燕等.广州市岩溶上覆砂土层塌陷特征及其内在机制[J].中山大学学报(自然科学版)(中英文),2024,63(05):38-47.

LIAO Jing,TIAN Jiayi,GAO Yan,et al.Destruction mechanism of sand-covered karst collapse in Guangzhou[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(05):38-47.
廖景,田嘉逸,高燕等.广州市岩溶上覆砂土层塌陷特征及其内在机制[J].中山大学学报(自然科学版)(中英文),2024,63(05):38-47. DOI： 10.13471/j.cnki.acta.snus.ZR20240078.

LIAO Jing,TIAN Jiayi,GAO Yan,et al.Destruction mechanism of sand-covered karst collapse in Guangzhou[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(05):38-47. DOI： 10.13471/j.cnki.acta.snus.ZR20240078.

摘要

本文以广州实际工程地质资料和工况为基础，建立了钻探等工程洞穿岩溶顶板后溶洞上覆砂土层塌陷的有限元数值模型。采用欧拉-拉格朗日耦合法（CEL）模拟岩溶上覆砂土层塌陷过程，借鉴正交实验法进行了多组数值模拟，研究了不同覆盖土层厚度、溶洞空腔大小和砂土内摩擦角对岩溶上覆砂土层塌陷发展模式的影响，阐释了砂土覆盖层坍塌的机理。研究表明，随砂土覆盖层厚度增大，砂土层的地表最大位移和塌陷速率均呈减小趋势，中心塌陷区域明显较小。随溶洞空腔尺寸的增大，塌陷范围和地表最大位移增大。钻探等工程洞穿岩溶顶板后，靠近岩溶空腔的竖向范围土体先失稳破坏，其影响范围主要受砂土覆盖层厚度影响，且塌陷速率主要受失稳的土体范围影响。在塌陷中心土体失稳后，周围土体才受到剪切应力的影响破坏而向溶洞空腔中心产生位移，周围土体向溶洞空腔运移量主要受溶洞空腔尺寸影响，且此部分砂土呈现出近似塌陷休止角的塌陷形态。

Abstract

Based on realistic engineering geological data in Guangzhou，this study establishes a finite element model for simulating the collapse of the overlying sand stratum after drilling through karst caves roofs.The coupled Euler-Lagrange method（CEL） is employed to simulate the collapse process of the sand stratum. Multiple sets of numerical simulations are conducted using orthogonal experimental design to investigate the influences of different sand stratum thicknesses，cave sizes，and friction angles on the development pattern and to elucidate the mechanism of collapse in the overlying sand stratum. The results indicate that as the thickness of the sandy soil cover layer increases，both the maximum surface displacement and collapse rate of the sand stratum decrease，and the central collapse area becomes noticeably smaller. With an increase in cave size，the collapse range and maximum surface displacement increase. After drilling through karst cave roofs in engineering projects，the vertically adjacent sand near the karst caves undergoes initial instability and failure，with its influence range primarily affected by the thickness of the sand stratum，and the collapse rate mainly influenced by the range of unstable soil. Once the soil in the central collapse area becomes unstable， the surrounding soil is subjected to shear stress and fails，causing displacement towards the center of the karst cave. The amount of soil migration towards the karst cave is mainly influenced by the size of the karst cave， and this portion of the sand exhibits a collapse morphology similar to the angle of repose.

关键词

岩溶塌陷砂土覆盖层破坏机理影响因素

Keywords

karst collapsesand stratumdestruction mechanisminfluence factors

references

贾龙，2021.城市岩溶地面塌陷隐患识别与评价研究［D］.武汉：中国地质大学.

黎秉林，2018.广州岩溶地区盾构地铁线路勘察研究［D］.广州：华南理工大学.

卢薇，易顺民，2021.广州市大坦沙岛岩溶塌陷成因分析及防治对策［J］.安全与环境工程，28（4）： 121-130.

罗小杰，罗程，2017.沙漏型岩溶地面塌陷物理模型［J］.中国岩溶，36（1）： 88-93.

蒙彦，2020.广花盆地岩溶塌陷多参数监测预警与风险防控［D］.武汉：中国地质大学.

潘启钊，刘锡儒，赵家福，等，2022.岩溶区钻探引起地面塌陷机理分析［J］.广东土木与建筑，29（8）： 5-8+12.

张丽芬，曾夏生，姚运生，等，2007.我国岩溶塌陷研究综述［J］.中国地质灾害与防治学报，（3）：126-130.

张鑫，崔可锐，査甫生，2016.覆盖型岩溶塌陷临界水位降幅模型试验研究［J］.科学技术与工程，16（12）： 195-199.

郑小战，郭宇，戴建玲，等，2014.岩溶塌陷区岩溶发育及影响因素［J］.热带地理，34（6）： 794-803.

中华人民共和国住房和城乡建设部，2012.建筑地基基础设计规范： GB 50007—2011［S］.北京：中国计划出版社.

ALONSO E E，GENS A，JOSA A，1990.A constitutive model for partially saturated soils［J］.Géotechnique，40（3）： 405-430.

CUI Q L，WU H N，SHEN S L，et al.，2015.Chinese karst geology and measures to prevent geohazards during shield tunnelling in karst region with caves［J］.Nat Hazards，77（1）： 129-152.

GU Z F，LIU Q，LU Y R，et al.，2016.Analysis and prevention of sinkhole collapses during the reconstruction and extension of Guang-Qing freeway，China［J］.Environ Earth Sci，75（9）： 788.

ISMAIL N I，KUANG S B，YU A B，2021.CFD-DEM study of particle-fluid flow and retention performance of sand screen［J］.Powder Technol，378： 410-420.

JIA L，MENG Y，LI L，et al.，2021.A multidisciplinary approach in cover-collapse sinkhole analyses in the mantle karst from Guangzhou City（SE China）［J］.Nat Hazards，108： 1389-1410.

MENG Y，JIA L，HUANG J M，2020.Hydraulic fracturing effect on punching-induced cover-collapse sinkholes： A case study in Guangzhou，China［J］.Arab J Geosci，13（1）：28.

MENG Y，LEI M T，LIN Y S，et al.，2012.Models and mechanisms of drilling-induced sinkhole in China［J］.Environ Earth Sci，67： 1961-1969.

SONG Y Q，RANJITH P G，WU B L，2021.A microscopic s tudy of sand arches and sand skeletons under hydrodynamic force based on the CFD-DEM model［J］.J Nat Gas Sci Eng，2021，92： 104017.

STANDING J R，SELEMETAS D，SHIRLAW J N，2013.Greenfield ground response to EPBM tunnelling in London Clay［J］.Géotechnique，63（12）： 989-1007.

TÓTH Á，GONG Q，ZHAO J，2013.Case studies of TBM tunnelling performance in rock-soil interface mixed ground［J］.Tunn Undergr Space Technol，38：140-150.

WANG X L，LAI J X，HE S Y，et al.，2020a.Karst geology and mitigation measures for hazards during metro system construction in Wuhan，China［J］.Nat Hazards，103： 2905-2927.

WANG X L，LAI J X，QIU J L，et al.，2020b.Geohazards，reflection and challenges in Mountain tunnel construction of China： a data collection from 2002 to 2018［J］.Geomat Nat Hazards Risk，11（1）： 766-785.

WANG X M，WANG S M，PENG X Y，et al.，2022.Equivalent numerical simulation method and application in karst-induced collapse of overlying sandy stratum［J］.Eng Fail Anal，137： 106280.

WANG Z C，HOU S L，YE Y，et al.，2022.Numerical simulation study on sand gravel layer collapse induced by tunnel lining damage［J］.Comput Part Mech，10： 757-768.

XIONG Z T，LIU P R，YANG T，et al.，2018.Mechanism of karst collapse caused by punching pile construction in Jiangxia Fasi karst collapse area［J］.Carsol Sin，37（1）：120-129.

ZHOU H T，LIU C Q，WANG G H，et al.，2022.Study on Drilling Ground Collapse Induced by Groundwater Flow and Prevention Based on a Coupled CFD-DEM Method［J］.KSCE J Civ Eng，26： 2112-2125.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Seasonal variation of suspended sediments in the Lingdingyang waters of the Pearl River Estuary from 2013 to 2018

Spatial change and influence factors of population aging in Guangzhou during 2000-2010

Related Author

JIA Qiwen

ZHANG Guifang

TANG Shilin

ZHANG Haoran

ZHOU Chunshan

LI Yixuan

Tong Xinmei

Guifang ZHANG

Related Institution

Guangdong Provincial Key Lab of Geodynamics and Geohazards

Guangdong Laboratory of Southern Ocean Science and Engineering

State Key Laboratory of Tropical Oceanography / South China Sea Institute of Oceanology， Chinese Academy of Sciences

中山大学地理科学与规划学院∥广东省城市化与地理环境空间模拟重点实验室

Postal code：510275
Tel：020-84112585，84113223 Email：xuebaozr@mail.sysu.edu.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰