澳门地区土层地震波速的测量结果
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摘要
通过一系列野外及实验室试验,对澳门地区土层地震波速进行了初步测量,从初步的现场试验结果来看,浅层的地震波速受到堆填物料的影响颇大,变化显得较为宽广,随着深度的增加,由于天然土层较为均一,地震波速的变化亦见收窄,现场剪切波速数据与标准贯入试验(SPT)数据可见一定吻合性。而通过等向及异向固结的实验室试验,发现澳门海泥的剪切波速在同一平均有效应力而不同应力路径下大致相同,此外,比较野外及实验室试验结果,亦显示澳门海泥的剪切波速受土体天然结构影响不大。
A series of in-situ tests and laboratory tests have been carried out to investigate seismic wave velocities and soil properties of Macau strata.The preliminary field testing results show that seismic wave velocities from shallow layers are significantly influenced by fill materials at the ground surface.Large dispersion of wave velocities was observed in the measurements.As the depth increases,the variation of measured wave velocities becomes smaller.SPT values and shear wave velocities were found fairly correlated.The results from isotropic and anisotropic consolidation tests demonstrate that the shear wave velocities are rather similar under deferent stress paths.In addition,comparison of the results from field and laboratory tests shows that the shear wave velocities of Macau marine clay seem to be not significantly influenced by its natural soil fabric.
A series of in-situ tests and laboratory tests have been carried out to investigate seismic wave velocities and soil properties of Macau strata.The preliminary field testing results show that seismic wave velocities from shallow layers are significantly influenced by fill materials at the ground surface.Large dispersion of wave velocities was observed in the measurements.As the depth increases,the variation of measured wave velocities becomes smaller.SPT values and shear wave velocities were found fairly correlated.The results from isotropic and anisotropic consolidation tests demonstrate that the shear wave velocities are rather similar under deferent stress paths.In addition,comparison of the results from field and laboratory tests shows that the shear wave velocities of Macau marine clay seem to be not significantly influenced by its natural soil fabric.
引文
①陆万海,张国基.比较国家标准与澳门规章对建筑物地震力之规定.第二届粤港澳地震科技研讨会,中国澳门,2006.
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[2]Dyvik,R.and Madshus,C.Lab Measurements of Gmax Using Bender Elements[A].Advances in the Artof Testing Soils under Cyclic Conditions[C],ASCE,1985,186-196.
[3]CERT.Soil Investigation Report,Report No.CERT188[M].Center for Engineering Research and Testing,2007.
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[5]Olson Instruments.Crosshole seismic/downhole seismic system guide[B].Olson Instruments,Inc,2007.
[6]Stokoe,K.H.,II,and Woods,R.D.In-Situ Shear Wave Velocity by Cross-Hole Method[J].Journal of the Soil Mechanics and Foundation Division,ASCE,Vol.98,No.SM5,1972,443-460.
[1]GB50011-2001.建筑抗震设计规范[S].
[2]Dyvik,R.and Madshus,C.Lab Measurements of Gmax Using Bender Elements[A].Advances in the Artof Testing Soils under Cyclic Conditions[C],ASCE,1985,186-196.
[3]CERT.Soil Investigation Report,Report No.CERT188[M].Center for Engineering Research and Testing,2007.
[4]CERT.Soil Investigation Report,Report No.CERT195[M].Center for Engineering Research and Testing,2007.
[5]Olson Instruments.Crosshole seismic/downhole seismic system guide[B].Olson Instruments,Inc,2007.
[6]Stokoe,K.H.,II,and Woods,R.D.In-Situ Shear Wave Velocity by Cross-Hole Method[J].Journal of the Soil Mechanics and Foundation Division,ASCE,Vol.98,No.SM5,1972,443-460.
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