盐分质量分数、含盐类别对山丹遗址土弹性波声速影响的实验
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摘要
在室内实验条件下,向遗址土中掺加不同质量分数、不同类别的盐分,通过声波检测仪测定各试块的纵波波速,同时根据弹性力学理论计算出动弹性力学参数,分析了盐分质量分数和含盐类别影响遗址土纵波波速特性机理.研究表明:在外界恒定温度、恒定相对湿度以及含水率一定的条件下,掺入盐分为硫酸钠和硫酸钙试块的纵向波速与盐分质量分数呈正线性相关关系;而掺入氯化钠盐试块的纵向波速与盐分质量分数呈负线性相关关系.研究结果可为西北干旱地区的土遗址病害及对其加固修复提供动力学依据,也可为盐渍土中的声波探测技术提供参考.
Under the experiment conditions in the laboratory,salt of different content and different types were added into the soil samples.The p-wave velocity of each test piece was mensurated by ultrasonic measuring system.At the same time,dynamic elastic mechanical parameters were calculated by the elasticity theory,and then the characteristics and mechanism of the influence of salt content and salt category on the p-wave velocity of soil samples from ancient ruins were analyzed.The research result shows that,under the conditions of constant temperature,constant humidity and constant moisture,the p-wave velocity of the test piece which has been blended with sodium sulfate and calcium sulphate has a positive linear relevant relation with the increase of the salt content concentration;but the test piece blended with sodium chloride has a negative linear relevant relation with the increase of the salt content concentration.The results could provide a dynamic basis for protecting the rare ancient earthen sites in northwest China;meanwhile,it could offer a reference for acoustic detection in saline soil.
Under the experiment conditions in the laboratory,salt of different content and different types were added into the soil samples.The p-wave velocity of each test piece was mensurated by ultrasonic measuring system.At the same time,dynamic elastic mechanical parameters were calculated by the elasticity theory,and then the characteristics and mechanism of the influence of salt content and salt category on the p-wave velocity of soil samples from ancient ruins were analyzed.The research result shows that,under the conditions of constant temperature,constant humidity and constant moisture,the p-wave velocity of the test piece which has been blended with sodium sulfate and calcium sulphate has a positive linear relevant relation with the increase of the salt content concentration;but the test piece blended with sodium chloride has a negative linear relevant relation with the increase of the salt content concentration.The results could provide a dynamic basis for protecting the rare ancient earthen sites in northwest China;meanwhile,it could offer a reference for acoustic detection in saline soil.
引文
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[19]李黎,王思敬,谷本亲伯.龙游石窟砂岩风化特征研究[J].岩石力学与工程学报,2008,27(60): 1218-1222.
[20]陈炜韬,李姝,王鹰.含盐量、含盐类别对盐渍土抗剪强度的影响[J].铁道建筑技术,2005(6):54-56.
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[22]张坤勇,殷宗泽,梅国雄.土体各项异性研究进展[J].岩土力学,2004,25(9):1503-1509.
[2]雷华阳,张文殊,张喜发,等.超氯盐渍土的工程特性指标研究[J].长春科技大学学报,2001,31(1): 70-73.
[3]王鹰,谢强,赵小兵.含盐地层工程性能及其对铁路工程施工的影响[J].矿物岩石,2000,31(10): 81-85.
[4]陈肖柏,邱国庆,王雅卿,等.重盐土在温度变化时的物理化学性质和力学性质[J].中国科学A辑:数学,1988,18(4):429-438.
[5]陈炜韬,王明年,王鹰,等.含盐量及含水量对氯盐盐渍土抗剪强度参数的影响[J].中国铁道科学, 2006,27(4):1-5.
[6]郭菊彬,宋吉荣,张昆.盐渍土强度参数与含盐量、含水量关系初探[J].四川建筑科学研究,2007, 33(5):98-109.
[7]盛煜,彭万巍,福田正己.超声波技术在冻土物性测试中的应用探讨[J].冰川冻土,2001,23(4): 432-435.
[8]王大雁,朱元林,赵淑萍,等.超声波法测定冻土动弹性力学参数试验研究[J].岩土工程学报,2002, 24(5):612-615.
[9]郑志华,张志毅,王德润.超声波法测试干砂试样剪切模量的试验研究[J].世界地震工程,2002, 18(4):62-65.
[10]凌贤长,徐学燕,徐春华,等.冻结哈尔滨粉质豁土超声波波速测定试验研究[J].岩土工程学报,2002, 24(4):456-459.
[11]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.
[12]陈仲侯,王兴泰,杜世汉.工程与环境物探教程[M].北京:地质出版社,1993.
[13]王大雁,朱元林,赵淑萍,等.超声波法测定冻土动弹性力学参数试验研究[J].岩土工程学报,2002, 24(5):612-615.
[14]丁伯阳.土层波速与地表脉动[M].兰州:兰州大学出版社,1996:264-340.
[15]柴寿喜,杨宝珠,王晓燕,等.含盐量对石灰固化滨海盐渍土力学强度影响实验研究[J].岩土力学, 2008,29(7):1769-1777.
[16]张虎元,闫玲,王锦芳.土质文物盐害的毛细水输盐机制研究[C]//2008古遗址保护国际学术讨论会暨2008国际岩石力学学会区域研讨会论文集.北京:科学出版社,2008:118-124.
[17]ANGELI M,BIGAS J P,BENAVENTE D,et al. Salt crystallization in pores:quantification and estimation of damage[J].Environ Geol,2007,52(2): 205-213.
[18]CARLOS R N,ERIC D.Salt weathering:influence of evaporation rate,supersaturation and crystallization pattern[J].Earth Surf Process Landforms, 1999,24(3):191-209.
[19]李黎,王思敬,谷本亲伯.龙游石窟砂岩风化特征研究[J].岩石力学与工程学报,2008,27(60): 1218-1222.
[20]陈炜韬,李姝,王鹰.含盐量、含盐类别对盐渍土抗剪强度的影响[J].铁道建筑技术,2005(6):54-56.
[21]王峥辉.下蜀黄土超声波波速与物理力学性质试验研究[D].南京:河海大学土木学院,2007.
[22]张坤勇,殷宗泽,梅国雄.土体各项异性研究进展[J].岩土力学,2004,25(9):1503-1509.
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