现场和室内测试最大动剪切模量的对比研究
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摘要
采用现场波速法和共振柱试验法,研究现场和室内测试最大动剪切模量的差异。选取西安、杭州和山东3个不同区域典型场地的实际钻孔资料,分别采用现场波速法和室内试验法求出最大动剪切模量,并对试验结果进行对比分析。结果表明,现场波速法和室内共振柱试验法测得的最大动剪切模量确实有明显差异,现场波速法测得的最大动剪切模量总是要比室内试验法测得的结果大,最大相差可达2倍左右。从总的趋势来看,增大的程度和土层埋深也有一定的关系,土层埋深越大,现场波速法和室内试验法测得的结果差值也越大。
The dynamic shear modulus(DSM) is the most basic soil parameter in earthquake or other dynamic loading conditions and can be obtained through testing in the field and in the laboratory.By testing three engineering sites of Xian,Hangzhou and Shandong,the experimental result of maximum dynamic shear modulus by using resonant column devices is compared with the field test data obtained from shear wave velocity measurement in the paper.The results here indicate that the difference of the maximum dynamic shear modulus between field and laboratory test is significantly larger.The result obtained by field test is always larger than the result obtained by laboratory test and the maximum difference is double.Moreover,it is seen that the difference degree of maximum dynamic shear modulus increases with increasing of the deep of soil layers.
The dynamic shear modulus(DSM) is the most basic soil parameter in earthquake or other dynamic loading conditions and can be obtained through testing in the field and in the laboratory.By testing three engineering sites of Xian,Hangzhou and Shandong,the experimental result of maximum dynamic shear modulus by using resonant column devices is compared with the field test data obtained from shear wave velocity measurement in the paper.The results here indicate that the difference of the maximum dynamic shear modulus between field and laboratory test is significantly larger.The result obtained by field test is always larger than the result obtained by laboratory test and the maximum difference is double.Moreover,it is seen that the difference degree of maximum dynamic shear modulus increases with increasing of the deep of soil layers.
引文
[1]刘德东,刘红帅.西安市阎良区地震小区划工作报告[R].哈尔滨:中国地震局工程力学研究所,2007.
[2]袁晓铭.杭州湾大桥初勘报告[R].哈尔滨:中国地震局工程力学研究所,2005.
[3]袁晓铭,孙静.晨报华源大厦工程场地地震安全性评价[R].哈尔滨:中国地震局工程力学研究所,2002.
[4]俞培基,郭锡荣.现场和室内测定黏性土的动剪模量[C]//全国土工建筑物及地基抗震学术讨论会论文汇编,1986.
[5]蒋寿田,王幸辛.郑州地区地基原状土动模量和阻尼比[C]//第三届全国土动力学学术会议,1990:151-155.
[6]Pitilakis K.D.,Anastassiadis A.,Rapatakis D.Fieldand laboratory determination of dynamic properties ofnatural soil deposits[C]//10th WCEE.Balkema,Rotterdam.1992:1 275-1 280.
[7]张立,王建华,程国勇.土样现场和室内剪切波速的试验研究[J].勘察科学技术,2003,(5):15-19.
[8]王建华,程国勇,张立.取样扰动引起土层剪切波速变化的试验研究[J].岩石力学与工程学报,2004,23(15):2 604-2 609.
[9]孙静,袁晓铭,陶夏新.室内和现场测试最大动剪切模量差别的试验研究[J].土木工程学报,2012,45(S1):258-262.
[10]Jing Sun and Xiaoming Yuan.The effect of the consol-idation ratio of sands on dynamic shear modulus andresponse spectrum of soil layer[J].Geotechnical Spe-cial Publication,ASCE.2006,n(150):437-443.
[11]袁晓铭,孙静.非均等固结下砂土最大动剪切模量的增长模式及Hardin公式的修正[J].岩土工程学报,2005,27(3):264-269.
[12]孙静,袁晓铭.固结比对黏性土动剪切模量影响的研究[J].岩土力学,2010,31(5):1 457-1 462.
[2]袁晓铭.杭州湾大桥初勘报告[R].哈尔滨:中国地震局工程力学研究所,2005.
[3]袁晓铭,孙静.晨报华源大厦工程场地地震安全性评价[R].哈尔滨:中国地震局工程力学研究所,2002.
[4]俞培基,郭锡荣.现场和室内测定黏性土的动剪模量[C]//全国土工建筑物及地基抗震学术讨论会论文汇编,1986.
[5]蒋寿田,王幸辛.郑州地区地基原状土动模量和阻尼比[C]//第三届全国土动力学学术会议,1990:151-155.
[6]Pitilakis K.D.,Anastassiadis A.,Rapatakis D.Fieldand laboratory determination of dynamic properties ofnatural soil deposits[C]//10th WCEE.Balkema,Rotterdam.1992:1 275-1 280.
[7]张立,王建华,程国勇.土样现场和室内剪切波速的试验研究[J].勘察科学技术,2003,(5):15-19.
[8]王建华,程国勇,张立.取样扰动引起土层剪切波速变化的试验研究[J].岩石力学与工程学报,2004,23(15):2 604-2 609.
[9]孙静,袁晓铭,陶夏新.室内和现场测试最大动剪切模量差别的试验研究[J].土木工程学报,2012,45(S1):258-262.
[10]Jing Sun and Xiaoming Yuan.The effect of the consol-idation ratio of sands on dynamic shear modulus andresponse spectrum of soil layer[J].Geotechnical Spe-cial Publication,ASCE.2006,n(150):437-443.
[11]袁晓铭,孙静.非均等固结下砂土最大动剪切模量的增长模式及Hardin公式的修正[J].岩土工程学报,2005,27(3):264-269.
[12]孙静,袁晓铭.固结比对黏性土动剪切模量影响的研究[J].岩土力学,2010,31(5):1 457-1 462.
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