沧州地面沉降区粘土压缩变形和渗透特征研究
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摘要
通过沧州地面沉降重点区水文地质工程地质综合试验孔土样试验结果,以点带面地分析了土样各物理指标之间的相关性,土体的颗粒结构,土体随深度和压力变化的压缩变形规律性,以及不同深度粘性土体的渗透特征。分析显示土样的各物理指标之间存在很强的相关性,土体的压缩性随压力和深度的变化有很强的规律性。含水层和粘性土的渗透系数差了6个数量级,间接表明地面沉降具有很强的滞后作用。分析结果将对深入研究沧州地区地面沉降的成因规律及客观地评价地面沉降发展趋势提供数据参考和科学依据,进而为研究有效遏制地面沉降发展趋势的防治措施提供技术支撑。
Soil samples were taken from the subsidence area in Cangzhou city and tested in laboratory.According to the test results,this paper analyzed relations among physical parameters of soil samples,granular structure of soil,compression deformation laws of soil with depth and pressure,and permeability characteristics of clay at different depths.The analysis shows that strong relations exist among different physical parameters,and good laws of compression with depth and pressure are found for soil samples.The hydraulic conductivities of clay are six orders of magnitude smaller than those of the aquifer,indicating the strong hypothesis of land subsidence.The analysis in this paper provides data and scientific basis for further study on mechanism of land subsidence in Cangzhou and objective evaluation of its development trend,and then provides technical support for study on prevention and control measures to efficiently inhibit the development trend of land subsidence.
Soil samples were taken from the subsidence area in Cangzhou city and tested in laboratory.According to the test results,this paper analyzed relations among physical parameters of soil samples,granular structure of soil,compression deformation laws of soil with depth and pressure,and permeability characteristics of clay at different depths.The analysis shows that strong relations exist among different physical parameters,and good laws of compression with depth and pressure are found for soil samples.The hydraulic conductivities of clay are six orders of magnitude smaller than those of the aquifer,indicating the strong hypothesis of land subsidence.The analysis in this paper provides data and scientific basis for further study on mechanism of land subsidence in Cangzhou and objective evaluation of its development trend,and then provides technical support for study on prevention and control measures to efficiently inhibit the development trend of land subsidence.
引文
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[3]Chatterjee R S,Fruneau B,Rudant J P,et al.Subsidence of Kolkata(Calcutta)City,India During the 1990sas Observed from Space by Differential Synthetic Aperture Radar Interferometry(D-InSAR)Technique[J].Remote Sensing of Environment,2006,102(1-2):176-185.
[4]Shelley E O,Ossa A,Romo M P.The Sinking of Mexico City:Its Effects on Soil Properties and Seismic Response[J].Soil Dynamics and Earthquake Engineering,2007,27:333-343.
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[6]邢忠信,李和学,张熟,等.沧州市地面沉降研究及防治对策[J].地质调查与研究,2004,27(3):157-163.
[7]郭永海,沈照理.从地面沉降论河北平原深层地下水资源属性及合理评价[J].地球科学,1995,20(4):415-420.
[8]张廉钧.超采深层地下水引起地面沉降规律的探讨[J].华北水利水电学院学报,1999,20(2):39-43.
[9]秦同春.沧州地区地下水开采与地面沉降的关系[J].水土保持应用技术,2010(1):39-49.
[10]任荣.试论华北平原的城市地面沉降与防治——以沧州市为例[J].工程勘察,1993(4):35-38.
[11]丁国平,胡成,陈华丽,等.衡水地面沉降区黏性土体渗透特征研究[J].工程地质学报,2012,20(1):82-87.
[12]Domenico P A,Schwartz F W.Physical and Chemical Hydrology[M].2nd ed.New York:Wiley,1998.
[2]Phien-wej N,Giao P H,Nutalaya P.Land Subsidence in Bangkok,Thailand[J].Engineering Geology,2006,82(4):187-201.
[3]Chatterjee R S,Fruneau B,Rudant J P,et al.Subsidence of Kolkata(Calcutta)City,India During the 1990sas Observed from Space by Differential Synthetic Aperture Radar Interferometry(D-InSAR)Technique[J].Remote Sensing of Environment,2006,102(1-2):176-185.
[4]Shelley E O,Ossa A,Romo M P.The Sinking of Mexico City:Its Effects on Soil Properties and Seismic Response[J].Soil Dynamics and Earthquake Engineering,2007,27:333-343.
[5]李志敏,孙炳华.沧州地下水超采与地面沉降关系的分析与探讨[J].地下水,2010,32(3):35-36.
[6]邢忠信,李和学,张熟,等.沧州市地面沉降研究及防治对策[J].地质调查与研究,2004,27(3):157-163.
[7]郭永海,沈照理.从地面沉降论河北平原深层地下水资源属性及合理评价[J].地球科学,1995,20(4):415-420.
[8]张廉钧.超采深层地下水引起地面沉降规律的探讨[J].华北水利水电学院学报,1999,20(2):39-43.
[9]秦同春.沧州地区地下水开采与地面沉降的关系[J].水土保持应用技术,2010(1):39-49.
[10]任荣.试论华北平原的城市地面沉降与防治——以沧州市为例[J].工程勘察,1993(4):35-38.
[11]丁国平,胡成,陈华丽,等.衡水地面沉降区黏性土体渗透特征研究[J].工程地质学报,2012,20(1):82-87.
[12]Domenico P A,Schwartz F W.Physical and Chemical Hydrology[M].2nd ed.New York:Wiley,1998.