辽西地区风积砂土振动液化特性的试验研究
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摘要
本文对辽西地区风积砂土地震液化特性进行了实验研究,对围压、固结比、密度和细粒含量进行了分析,得出了它们对抗液化强度的影响规律,同时分析了不同细粒含量和干密度对砂土振动孔压发展模式的影响规律。在偏压固结情况下,振动孔压的发展趋势可以用双曲线对其进行模拟;在均压固结条件下,振动孔压的发展趋势和H.B.Seed、张建民等人研究的振动孔压发展趋势的曲线形态相一致。通过实验分析表明细粒含量、密度等都会对孔压的增长规律有一定影响。
For the purpose of examining the characteristics of the aeolian sand in western Liaoning,this paper takes the aeolian sand as an experimental object to test the earthquake liquefaction properties.Based on the experiment data,the consolidation ratio,confining pressure,density and fine-grained content are analyzed to examine the influence rules of such factors to the anti-liquefaction strength and the different content on dry density and the fine-grained to the sand dynamic pore pressure development model is established.The pore pressure has two distinct trends.Under the condition of pressure bias and consolidation,it can be simulated by the hyperbolic model,but while the pressure is equalizing and consolidation,it is in agreement with the curve shape suggested by Seed and Zhang.Finally,we conclude that the factors such as density,fine-grained content and so on will have certain impact on the law of pore pressure increase.
For the purpose of examining the characteristics of the aeolian sand in western Liaoning,this paper takes the aeolian sand as an experimental object to test the earthquake liquefaction properties.Based on the experiment data,the consolidation ratio,confining pressure,density and fine-grained content are analyzed to examine the influence rules of such factors to the anti-liquefaction strength and the different content on dry density and the fine-grained to the sand dynamic pore pressure development model is established.The pore pressure has two distinct trends.Under the condition of pressure bias and consolidation,it can be simulated by the hyperbolic model,but while the pressure is equalizing and consolidation,it is in agreement with the curve shape suggested by Seed and Zhang.Finally,we conclude that the factors such as density,fine-grained content and so on will have certain impact on the law of pore pressure increase.
引文
[1]任红梅,吕西林,李培振.饱和砂土液化研究进展[J].地震工程与工程振动,2007(12):166-175.[REN H M,LV X L,LI P Z.Liquefaction ofsaturated sand Progress[J].Journal of EarthquakeEngineering and Engineering Vibration,2007(12):166-175.(in Chinese)]
[2]谢定义.土动力学[M].西安:西安交通大学出版社,1988.[XIE D Y.Soil Dynamics[M].Xi’an:Xi’an Jiaotong University Press,1988.(inChinese)]
[3]任金刚,王玉芳.饱和砂土地震液化研究方法概述[J].海河水利,2006(3):51-53.[REN J G,WANG Y F.Liquefaction of saturated sand overviewof the methods[J].Haihe River Water Resources,2006(3):51-53.(in Chinese)]
[4]李驰,王建华.加筋风积砂地基承载力试验研究及计算分析[J].岩石力学与工程学报,2005,24(4):687-691.[LI C,WANG J H.Aeolian sandfoundation bearing capacity analysis of experimentaland computational study[J].Chinese Journal ofRock Mechanics and Engineering,2005,24(4):687-691.(in Chinese)]
[5]衡朝阳,何满潮,裘以惠.含黏粒砂土抗液化性能的试验研究[J].工程地质学报,2001,9(4):339-344.[HENG C Y,HE M C,QIAO Y H.Experimental study of liquefaction-resistantcharacteristics of clayey sand[J].Journal ofEngineering Geology,2001,9(4):339-344.(inChinese)]
[6]周海林,王星华.动三轴试验中的饱和砂土孔隙水压力分析[J].铁道学报,2002,24(6):93-98.[ZHOU H L,WANG X H.Dynamic triaxial tests ofsaturated sand in the pore water pressure analysis[J].Railway Society,2002,24(6):93-98.(inChinese)]
[7]张建民.砂土的可逆性和不可逆性剪胀规律[J].岩土工程学报,2000,22(1):12-17.[ZHANG J M.Sand reversible and irreversible dilatancy law[J].Journal of Geotechnical Engineering,2000,22(1):12-17.(in Chinese)]
[8]谢定义,张建民.周期荷载下饱和砂土瞬态孔隙水压力的变化机理与计算模型[J].土木工程学报,1990,23(2):51-60.[XIE D Y,ZHANG J M.Saturated sand under cyclic load transient changes inpore water pressure mechanism and computationalmodel[J].Civil Engineering Journal,1990,23(2):51-60.(in Chinese)]
[9]钟贻军,牟崇元.砂土振动液化危险性分析方法比较研究[J].岩石力学与工程学报,2001,20(1):87-89.[ZHONG Y J,MOU C Y.Sand liquefactionhazard analysis comparative study[J].ChineseJournal of Rock Mechanics and Engineering,2001,20(1):87-89.(in Chinese)]
[10]王峻,王兰民,李兰.饱和砂土液化的动三轴试验判断与评价[J].西北地震学报,2004,26(3):286-288.[WANG J,WANG L M,LI L.Liquefaction ofsaturated sand to determine the dynamic triaxial testand evaluation[J].Northwestern SeismologicalJournal,2004,26(3):286-288.(in Chinese)]
[11]张建民,王富强.饱和剪胀性砂土液化后流滑现象与机理[J].岩土力学,2010,31(9):2711-2715.[ZHANG J M,WANG F Q.Saturated dilatant sandliquefaction flow slide phenomena and mechanism[J].Rock and Soil Mechanics,2010,31(9):2711-2715.(in Chinese)]
[12]张建民,王刚.砂土液化后大变形的机理[J].岩土工程学报,2006,28(7):835-840.[ZHANG J M,WANG G.Sand after liquefaction mechanism of largedeformation[J].Journal of GeotechnicalEngineering,2006,28(7):835-840.(inChinese)]
[13]袁聚云.土工试验与原理[M].上海:同济大学出版社,2003.[YUAN J Y.Soil test and the principle[M].Shanghai:Tongji University Press,2003.(inChinese)]
[14]Seed H B.Pore-water pressure changes during soilliquefaction[J].ASCE,1976,112(GT4):327-346.
[15]冷艺,栾茂田,许成顺,等.应力历史对饱和砂土力学性状影响的试验研究[J].岩土力学,2009,30(5):1257-1263.[LENG Y,LUAN M T,XU C S,et al.Stress history on mechanical behavior ofsaturated sand pilot study[J].Rock and SoilMechanics,2009,30(5):1257-1263.(inChinese)]
[2]谢定义.土动力学[M].西安:西安交通大学出版社,1988.[XIE D Y.Soil Dynamics[M].Xi’an:Xi’an Jiaotong University Press,1988.(inChinese)]
[3]任金刚,王玉芳.饱和砂土地震液化研究方法概述[J].海河水利,2006(3):51-53.[REN J G,WANG Y F.Liquefaction of saturated sand overviewof the methods[J].Haihe River Water Resources,2006(3):51-53.(in Chinese)]
[4]李驰,王建华.加筋风积砂地基承载力试验研究及计算分析[J].岩石力学与工程学报,2005,24(4):687-691.[LI C,WANG J H.Aeolian sandfoundation bearing capacity analysis of experimentaland computational study[J].Chinese Journal ofRock Mechanics and Engineering,2005,24(4):687-691.(in Chinese)]
[5]衡朝阳,何满潮,裘以惠.含黏粒砂土抗液化性能的试验研究[J].工程地质学报,2001,9(4):339-344.[HENG C Y,HE M C,QIAO Y H.Experimental study of liquefaction-resistantcharacteristics of clayey sand[J].Journal ofEngineering Geology,2001,9(4):339-344.(inChinese)]
[6]周海林,王星华.动三轴试验中的饱和砂土孔隙水压力分析[J].铁道学报,2002,24(6):93-98.[ZHOU H L,WANG X H.Dynamic triaxial tests ofsaturated sand in the pore water pressure analysis[J].Railway Society,2002,24(6):93-98.(inChinese)]
[7]张建民.砂土的可逆性和不可逆性剪胀规律[J].岩土工程学报,2000,22(1):12-17.[ZHANG J M.Sand reversible and irreversible dilatancy law[J].Journal of Geotechnical Engineering,2000,22(1):12-17.(in Chinese)]
[8]谢定义,张建民.周期荷载下饱和砂土瞬态孔隙水压力的变化机理与计算模型[J].土木工程学报,1990,23(2):51-60.[XIE D Y,ZHANG J M.Saturated sand under cyclic load transient changes inpore water pressure mechanism and computationalmodel[J].Civil Engineering Journal,1990,23(2):51-60.(in Chinese)]
[9]钟贻军,牟崇元.砂土振动液化危险性分析方法比较研究[J].岩石力学与工程学报,2001,20(1):87-89.[ZHONG Y J,MOU C Y.Sand liquefactionhazard analysis comparative study[J].ChineseJournal of Rock Mechanics and Engineering,2001,20(1):87-89.(in Chinese)]
[10]王峻,王兰民,李兰.饱和砂土液化的动三轴试验判断与评价[J].西北地震学报,2004,26(3):286-288.[WANG J,WANG L M,LI L.Liquefaction ofsaturated sand to determine the dynamic triaxial testand evaluation[J].Northwestern SeismologicalJournal,2004,26(3):286-288.(in Chinese)]
[11]张建民,王富强.饱和剪胀性砂土液化后流滑现象与机理[J].岩土力学,2010,31(9):2711-2715.[ZHANG J M,WANG F Q.Saturated dilatant sandliquefaction flow slide phenomena and mechanism[J].Rock and Soil Mechanics,2010,31(9):2711-2715.(in Chinese)]
[12]张建民,王刚.砂土液化后大变形的机理[J].岩土工程学报,2006,28(7):835-840.[ZHANG J M,WANG G.Sand after liquefaction mechanism of largedeformation[J].Journal of GeotechnicalEngineering,2006,28(7):835-840.(inChinese)]
[13]袁聚云.土工试验与原理[M].上海:同济大学出版社,2003.[YUAN J Y.Soil test and the principle[M].Shanghai:Tongji University Press,2003.(inChinese)]
[14]Seed H B.Pore-water pressure changes during soilliquefaction[J].ASCE,1976,112(GT4):327-346.
[15]冷艺,栾茂田,许成顺,等.应力历史对饱和砂土力学性状影响的试验研究[J].岩土力学,2009,30(5):1257-1263.[LENG Y,LUAN M T,XU C S,et al.Stress history on mechanical behavior ofsaturated sand pilot study[J].Rock and SoilMechanics,2009,30(5):1257-1263.(inChinese)]
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