[1]钟 瑶. 张湾村峡卡河岩溶塌陷数值模拟及成因[J].湖北工业大学学报,2022,(5):93-97.
　ZHONG Yao. The Evolution Process and Numerical Simulation Research of Karst Collapse Induced by the Decline of Groundwater Level[J].,2022,(5):93-97.
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 张湾村峡卡河岩溶塌陷数值模拟及成因()
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《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
期数:
2022年第5期
页码:
93-97
栏目:
湖北工业大学学报
出版日期:
2022-10-25

文章信息/Info

Title:
 The Evolution Process and Numerical Simulation Research of Karst Collapse Induced by the Decline of Groundwater Level
文章编号:
1003-4684(2022)05-0093-05
作者:
 钟 瑶
 湖北工业大学土木建筑与环境学院， 湖北 武汉 430068
Author(s):
 ZHONG Yao
 School of Civil Engin.,Architecture and Environment,Hubei Univ. of Tech.,Wuhan 430068,China
关键词:
 ; 岩溶塌陷;  水位下降;  演化过程;  数值模拟
Keywords:
 ; karst collapse;  water level drops;  evolution process;  numerical simulation
分类号:
TU43
文献标志码:
A
摘要:
 为探寻地下水位下降时岩溶塌陷的演化过程，以张湾村峡卡河研究区岩溶塌陷为研究对象，结合工程资料，通过FLAC3D数值模拟软件对岩溶塌陷的过程进行计算分析，得到计算模型在地下水位下降三个阶段下的应力应变云图，从而得出研究区溶洞的发育规律。研究结果表明：在地下水下降时，土体受剪应力集中作用发生破坏，导致溶洞直径拓展发育，与溶洞坍塌时呈坛状或碟状塌陷坑形状相符。溶洞顶部出现较大应力应变值，且土层越高应变差值越大，最大垂向位移出现在溶洞的顶部位置，同时顶部塑性张拉区继续向上延伸最终贯通土层表面，导致塌陷破坏，与研究区溶洞的破坏常出现顶部垂向坍塌现象相符。数值模拟分析为张湾村峡卡河研究区岩溶塌陷的防治提供了理论依据。
Abstract:
 In order to explore the evolution process of Karst collapse when the groundwater level drops, the Karst collapse in the Xiaka River research area in Zhangwan Village is taken as the research object. Combined with engineering data, the Karst collapse process is calculated and analyzed by FLAC3D numerical simulation software, and the calculation model is obtained in the groundwater. The stress and strain cloud diagrams under the three stages of potential drop, and the development law of Karst caves in the study area can be obtained. The research results show that when the groundwater drops, the soil is damaged by the concentrated action of shear stress, which leads to the expansion and development of the diameter of the cavern, which is consistent with the shape of the pan-shaped or dish-shaped collapse pit when the cavern collapses. Larger stress and strain values appear at the top of the cave, and the higher the soil layer, the greater the strain difference. The maximum vertical displacement appears at the top of the cave. At the same time, the plastic tension zone at the top continues to extend upward and finally penetrates the surface of the soil layer, resulting in collapse and failure. It is consistent with the failure of Karst caves in the study area, which often lead to vertical collapse at the top. Numerical simulation analysis provides a theoretical basis for the prevention and control of Karst collapse in the Xiaka River study area of Zhangwan Village.

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备注/Memo

备注/Memo:
［收稿日期］ 2021-08-01
［第一作者］ 钟 瑶（1997-），男，湖北孝感人，湖北工业大学硕士研究生，研究方向为岩土工程的应用
更新日期/Last Update: 2022-10-26