红黏土物理力学性质与声波波速关系的初步研究
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摘要
声波波速测试作为一种快速、简便、无损的检测方法,在岩土、地质工程中已被广泛运用。采用WSD-2数字声波仪对贵阳市金阳区某建筑楼盘的红黏土土样在不同的含水率、孔隙比、砂土配合比击实条件下的声波波速进行测定,分析了不同物理力学状态下的红黏土声波波速的变化规律。结果表明:红黏土原状土样的声波波速与其含水率呈"U"型关系,而随其孔隙比的增大而减小;击实红黏土重塑土样的声波波速随其含水率的增大呈先增大后减小的二次函数关系,而与其干密度大致呈正相关的关系。该研究结果验证了通过红黏土的声波波速来反算其物理力学性质指标值的可行性,为进一步开展理论研究和生产实践提供了试验依据。
The test of acoustic wave velocity is widely used as a fast,simple and lossless testing way in rock and soil engineering and geological engineering.This paper applies the WSD-2 digital acoustic wave meter to determining the wave velocity of red clay in a building in Jinyang District,Guiyang City under different water cut rates,different void ratios,and different sand mix ratios,and analyzes the variation of wave velocity of red clay in different physical and mechanical states.The results show that there is the relationship of "U" style between moisture content and acoustic wave velocity of red clay,and acoustic wave velocity decreases with the increase of void ratio;the compaction experiment of different ratios of sand and soil shows that the acoustic wave velocity of remolded soil after compaction increases at first and decreases later along with the increase of moisture content,roughly obeying the quadric relationship and the dry density of soil samples is positively related with the acoustic wave velocity.The results can provide basis of experiments for further theoretical researches and production and practice.
The test of acoustic wave velocity is widely used as a fast,simple and lossless testing way in rock and soil engineering and geological engineering.This paper applies the WSD-2 digital acoustic wave meter to determining the wave velocity of red clay in a building in Jinyang District,Guiyang City under different water cut rates,different void ratios,and different sand mix ratios,and analyzes the variation of wave velocity of red clay in different physical and mechanical states.The results show that there is the relationship of "U" style between moisture content and acoustic wave velocity of red clay,and acoustic wave velocity decreases with the increase of void ratio;the compaction experiment of different ratios of sand and soil shows that the acoustic wave velocity of remolded soil after compaction increases at first and decreases later along with the increase of moisture content,roughly obeying the quadric relationship and the dry density of soil samples is positively related with the acoustic wave velocity.The results can provide basis of experiments for further theoretical researches and production and practice.
引文
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[9] 李艳,吉军鹏.水泥红黏土的超声波特征试验研究[J].交通科学与工程,2016,32(1):17-21.
[10]敬亚平,郝江南.中铁·逸都国际D组团DS-1、DS-2、DS-3商业岩土工程勘察报告[R].贵阳:贵阳建筑勘察设计有限公司,2016.
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[12]王铮辉.下蜀黄土超声波波速与物理力学性质试验研究[D].南京:河海大学,2007.
[2] 韩贵琳.贵阳地区红黏土工程地质特征[J].贵州地质,1992,9(3):292-296.
[3] Stephenson R W.Ultrasonic testing for determining dynamic soil dynamic moduls[M]//Mynamic Geotechnical Testing.Philadelphia:ASTM,1978:179-195.
[4] Alba P D,Baldwin K,Janoo V,et al.Elastic-wave velocities and liquefaction potential[J].Geotechnical Testing Journal,1984,7(2):77-87.
[5] 王大雁,朱元林,马巍,等.冻土超声波波速与冻土物理力学性质试验研究[J].岩石力学与工程学报,2003,22(11):1837-1840.
[6] 王峥辉,杨凤根,徐建龙.粘性土物理力学性质与超声波波速关系的试验研究[J].江苏地质,2007,31(3):247-250.
[7] 黄星,李东庆,明锋,等.冻结粉质黏土声学特性与物理力学性质试验研究[J].岩石力学与工程学报,2015,34(7):1489-1496.
[8] 王飞声.粘土超声波速度变化因素研究[J].西部探矿工程,2015,1(11):1-4.
[9] 李艳,吉军鹏.水泥红黏土的超声波特征试验研究[J].交通科学与工程,2016,32(1):17-21.
[10]敬亚平,郝江南.中铁·逸都国际D组团DS-1、DS-2、DS-3商业岩土工程勘察报告[R].贵阳:贵阳建筑勘察设计有限公司,2016.
[11]南京水利科学研究院.土工试验规程:SL 237—1999[S].北京:中国水利水电出版社,1999.
[12]王铮辉.下蜀黄土超声波波速与物理力学性质试验研究[D].南京:河海大学,2007.