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| 岩溶塌陷有限元稳定性分析 | |
| 引用本文： | 方先知,马文瀚,戴塔根,陈平.岩溶塌陷有限元稳定性分析[J].中国地质灾害与防治学报,2009,20(4):78-80. |
| 作者姓名： | 方先知 马文瀚 戴塔根 陈平 |
| 作者单位： | 1. 中南大学地学与环境工程学院,湖南,长沙,410083 2. 中南大学地学与环境工程学院,湖南,长沙,410083;湖南省地质环境监测总站,湖南,长沙,410007 3. 湖南省地质环境监测总站,湖南,长沙,410007 |
| 基金项目： | 湖南省国土资源厅地质灾害气象预警资助项目 |
| 摘 要： | 湖南省凤凰至大兴公路K0+500-K5+000段穿越碳酸盐岩区,据地面调查及钻探揭露,公路沿线发育溶洞,对区内岩溶地质环境进行了调查.选取典型溶洞,采用有限元稳定性分析方法对岩溶体稳定性进行分析,路堑开挖后产生的位移为1.2mm,最大主应力为6.3MPa,运营状态下静力荷载20kPa,通过计算溶洞在路堑开挖后和车辆荷载作用下位移场与应力场变化情况,认为溶洞是稳定的. |
| 关 键 词： | 有限元 岩溶塌陷 稳定性分析 岩溶洞穴 应力场 位移场 |
Stability Analysis of Karst Collapse using Finite Element Method |
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| FANG Xian-zhi,MA Wen-han,DAI Ta-gen,CHEN Ping.Stability Analysis of Karst Collapse using Finite Element Method[J].The Chinese Journal of Geological Hazard and Control,2009,20(4):78-80. | |
| Authors: | FANG Xian-zhi MA Wen-han DAI Ta-gen CHEN Ping |
| Abstract: | Fenghuang-Daxing highway k0 + 500 - k5 + 000 section passes through carbonate rocks zone.According to ground investigation and drilling exposition materials, the paper verifies the limestone cave situation and investigates the karst geological environment.In order to evaluate the stability of typical karst cave, a series of finite-element analysis method was done, as well as a conclusion was drawn that if cuts is excavated according to the standard, the maximum displacement should be 1.2mm.The maximum principal stress was 6.3MPa under the excavating condition and the maximum static load was 20KPa in cave periphery.Using the present method, the stability of No.10 karst cave was calculated and the feasibility of design was evaluated. |
| Keywords: | finite-element karst collapse stability analysis karst cave stress field displacement field |
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