| 上海市城市化进程引起的地面沉降因素分析 |
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| 引用本文： | 许烨霜,马磊,沈水龙.上海市城市化进程引起的地面沉降因素分析[J].岩土力学,2011,32(Z1):578-0582. |
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| 作者姓名： | 许烨霜 马磊 沈水龙 |
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| 作者单位： | 上海交通大学土木工程系国家海洋工程重点试验室 |
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| 基金项目： | 国家自然科学基金项目(No.41072209);上海市重点学科建设项目资助(No.B208);海洋工程国家重点实验室自主研究课题资助项目(No.GKZD010051) |
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| 摘 要： | 20世纪90年代上海中心城区的地面沉降在地下水开采量没有增加的情况下出现了新一轮的增长。与此同时,上海进行了大规模的城市化建设。通过对中心城区地面沉降量与工程建设进行相关性分析发现,近年来中心城区的地面沉降量与工程建设具有相关性。目前城市化建设引起地面沉降的现象已受到关注,但尚缺乏对城市化进程引起地面沉降机制的系统研究。针对上海市城市化进程引起地面沉降的因素进行分析探讨,城市化进程引起的沉降包括建筑物荷载及交通荷载等外荷载引起的沉降,基坑开挖、降水及隧道施工等工程施工引起的土体压缩,以及隧道渗漏,周边地区对地下水补给量的减小,地下构筑物挡水效应等引起的地下水位持续下降而诱发的沉降。
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| 关 键 词： | 地面沉降 地下水开采 影响因素 城市化 |
| 收稿时间： | 2010-12-22 |
Influential factors on development of land subsidence with process of urbanization in Shanghai |
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| XU Ye-shuang,MA Lei,SHEN Shui-long.Influential factors on development of land subsidence with process of urbanization in Shanghai[J].Rock and Soil Mechanics,2011,32(Z1):578-0582. |
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| Authors: | XU Ye-shuang MA Lei SHEN Shui-long |
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| Institution: | State Key Laboratory of Ocean Engineering, Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | Since 1990s, land subsidence accelerated again although net withdrawal volume of groundwater did not increase in urban center of Shanghai. Net withdrawal volume of groundwater in urban center, however, is not the crucial factor controlling the land subsidence. At the same time, more and more infrastructures, such as high and super-high rise buildings, deep building foundations, underground structures, subway tunnels, underground path structures, were constructed in the multi-aquifer-aquitard system (MAAS) in Shanghai. Land subsidence in Shanghai is correlated with activities of urban construction according to correlation anaylsis of land subsidence and urban construction. Investigation on urban construction induced land subsidence is now receiving a great concern. However, mechanism of how urban construction affects the acceleration of land subsidence in Shanghai has not been well addressed. This study was undertaken to evaluate the influential factors on the development of land subsidence with the process of urbanization in Shanghai. The influential factors include additional load consisting of static load and dynamic load during and after structures construction, underground structures construction involving foundation engineering and construction of tunnel, drawdown of groundwater level due to leakage of underground structures, decrease of recharged volume of groundwater from surroundings, and cut-off or partially cut-off effect of underground structures in aquifers. |
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| Keywords: | land subsidence groundwater withdrawal influential factors urbanization |
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