澳门土壤剪切波速的相关性分析
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摘要
土壤的剪切波速(VS),是抗震设计的一个重要参数,但有关澳门土层的相关资料则十分稀少。研究的主要目的是根据近期野外测试的结果,探讨澳门土层的VS与标准贯入试验的打击锤数(N)的关系,并以简单之幂函数建立VS与N值的关系式。作为澳门轻轨交通系统之勘察计划,研究进行了五组下孔法(DH),地震波圆锥触探试验(S-CPT)以及标准贯入试验(SPT)的测试。根据试验结果所得的关系式估算剪切波速高于较澳门轻轨设计大纲的建议值,而使用另一有关澳门土层的数据库来验证新的关系式,亦可获得合理的决定系数。
Dynamic soil properties are important parameters for earthquake-resistant design. However,corresponding information is very scarce for Macau soils. This paper presents the preliminary correlation results between VSand SPT blow counts on Macau soils based on recent field tests obtained from the site investigation program for the design of the Macau Light Rapid Transit(LRT) project. Five pairs of Down-Hole(DH) and Seismic Cone Penetration Test(S-CPT) were performed at various locations to measure the shear wave velocity together with Standard Penetration Test( SPT) carried out in the corresponding boreholes. A preliminary correlation relationship of shear wave velocity( VS) and SPT blow counts( N) was also developed based on a power function. Compared with the Design Brief of LRT in which a preliminary correlation guideline is presented, this correlation, established based on the testing results, generally predicts higher shear wave velocity for soft to medium soft soils. Favorable coefficients of determination were also obtained for the newly established correlation evaluated with a different data set from an independent study for Macau soils.
Dynamic soil properties are important parameters for earthquake-resistant design. However,corresponding information is very scarce for Macau soils. This paper presents the preliminary correlation results between VSand SPT blow counts on Macau soils based on recent field tests obtained from the site investigation program for the design of the Macau Light Rapid Transit(LRT) project. Five pairs of Down-Hole(DH) and Seismic Cone Penetration Test(S-CPT) were performed at various locations to measure the shear wave velocity together with Standard Penetration Test( SPT) carried out in the corresponding boreholes. A preliminary correlation relationship of shear wave velocity( VS) and SPT blow counts( N) was also developed based on a power function. Compared with the Design Brief of LRT in which a preliminary correlation guideline is presented, this correlation, established based on the testing results, generally predicts higher shear wave velocity for soft to medium soft soils. Favorable coefficients of determination were also obtained for the newly established correlation evaluated with a different data set from an independent study for Macau soils.
引文
[1]Hoar,R.J.,Stokoes,K.H.II.Generation and measurement of shear wave in situ[J].ASTM STP 654-EB,1978:3-25.
[2]Robertson,P.K.,Campanella,R.G.,Gillespie,D.,et al.Seismic CPT to measure in situ shear wave velocity in measurement and use of shear wave velocity for evaluating dynamic soil properties[M].New York:ASCE,1985.
[3]LECM.澳门屋宇及桥梁结构之安全及荷载规章(RSAEEP)──地震作用更新的咨询文本[M].澳门:出版者不详,2008.
[4]Sae Teng,T.In situ shear wave measurement and ground response analysis for developing site-dependent response spectra in Macau[D].Macau:University of Macau,2009.
[5]Hasancebi,N,Ulusay,R.Empirical correlations between shear wave velocity and penetration resistance for ground shaking assessments[J].Bulletin of Engineering Geology and Environment,2007,66:203-13.
[6]Lok,T.M.H.,Sae Teng,T.,Hao,et al.Wave velocity of Macao marine clay from field and laboratory measurement[C].Taipei:The 3rd International Conference on Site Characterization,2008.
[7]Hao,G.,Lok,T.M.H.Study of shear wave velocity of Macao marine clay under anisotropic stress condition[C].Beijing:The 14th World Conference on Earthquake Engineering October,2008.
[2]Robertson,P.K.,Campanella,R.G.,Gillespie,D.,et al.Seismic CPT to measure in situ shear wave velocity in measurement and use of shear wave velocity for evaluating dynamic soil properties[M].New York:ASCE,1985.
[3]LECM.澳门屋宇及桥梁结构之安全及荷载规章(RSAEEP)──地震作用更新的咨询文本[M].澳门:出版者不详,2008.
[4]Sae Teng,T.In situ shear wave measurement and ground response analysis for developing site-dependent response spectra in Macau[D].Macau:University of Macau,2009.
[5]Hasancebi,N,Ulusay,R.Empirical correlations between shear wave velocity and penetration resistance for ground shaking assessments[J].Bulletin of Engineering Geology and Environment,2007,66:203-13.
[6]Lok,T.M.H.,Sae Teng,T.,Hao,et al.Wave velocity of Macao marine clay from field and laboratory measurement[C].Taipei:The 3rd International Conference on Site Characterization,2008.
[7]Hao,G.,Lok,T.M.H.Study of shear wave velocity of Macao marine clay under anisotropic stress condition[C].Beijing:The 14th World Conference on Earthquake Engineering October,2008.
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