| 基于改进的Mogi模型对樟树盐矿采空区地面沉降的分析 |
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| 引用本文： | 徐玉龙,杨春和,李银平,施锡林,孔君凤,李浩然.基于改进的Mogi模型对樟树盐矿采空区地面沉降的分析[J].岩土力学,2014,35(10):2894-2900. |
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| 作者姓名： | 徐玉龙 杨春和 李银平 施锡林 孔君凤 李浩然 |
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| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071；2. 上海光华勘测设计院有限公司，上海 200050 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)(No.2009CB724602，No.2009CB724603)；面上基金(No.41272391)。 |
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| 摘 要： | 樟树现代医药物流中心项目区周边采卤井引发的地面沉降是关系到项目区能否投入建设的关键问题。Mogi模型是基于半无限空间弹性理论的地面沉降预测模型，而盐矿采空区地表沉降变形的主要诱因是地下腔体体积的蠕变收缩，通过引入稳态蠕变阶段盐溶腔体积收缩解析解，对Mogi模型进行改进，并应用于项目区的地面沉降预测，利用沉降叠加的方法获得采卤井群诱发地面沉降发展趋势。结果显示：樟树医药物流中心周边卤井群蠕变引发的地面沉降及地面倾斜均在地基基础设计规范要求范围内；随着与井群距离的增大，项目区内地面倾斜呈现先增大后变小的趋势。同时，利用改进的Mogi模型得到的地面沉降和地面倾斜与相同条件下数值模拟沉降结果有着良好的相似，改进的Mogi模型为盐矿采空区及盐穴储气库的地面沉降分析提供了一种准确、快速的方法。
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| 关 键 词： | 盐矿采空区 地面沉降 Mogi模型 倾斜 |
| 收稿时间： | 2013-07-03 |
Analysis of ground subsidence induced by gobs of salt caverns in Zhangshu based on improved Mogi mode |
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| XU Yu-long,YANG Chun-he,LI Yin-ping,SHI Xi-lin,KONG Jun-feng,LI Hao-ran.Analysis of ground subsidence induced by gobs of salt caverns in Zhangshu based on improved Mogi mode[J].Rock and Soil Mechanics,2014,35(10):2894-2900. |
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| Authors: | XU Yu-long YANG Chun-he LI Yin-ping SHI Xi-lin KONG Jun-feng LI Hao-ran |
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| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Shanghai Guanghua Investigation and Design Institute Company Limited, Shanghai 200050, China |
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| Abstract: | Ground subsidence induced by salt cavern gobs under the planned Zhangshu Modern Pharmaceutical Logistic Center determines the feasibility of the project. Mogi model is a ground movement prediction model based on the principle of semi-infinite elasticity, which has been widely used in the modeling of the deformation of volcanoes caused by pressure changes in their magma chambers. With the consideration that the main cause of salt cavern-induced subsidence is the volume shrinkage of caverns, the analytical solution of the salt cavern in steady state creep is introduced to improve the Mogi model and the improved model is used to predict the subsidence of Pharmaceutical Logistic Center. The superposition method is cited to gain the subsidence of the cavern group. The results show that: the ground subsidence and tilt induced by cavern groups are within the scope of building foundation settlement rule, and along with the increase of the distance to cavern groups, the ground tilt firstly increases, and then decreases. What else, the results by Mogi model are in accordance with the numerical simulation. The improved Mogi model provides an accurate and fast method for the ground subsidence analysis of salt cavern groups. |
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| Keywords: | gobs of salt cavern ground subsidence Mogi model tilt |
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