加筋土挡土墙工作机理改进原型试验研究
|
摘要
在前人研究的基础上,对加筋土挡土墙试验原型进行了改进。以不同超载下墙面板的土压力、墙面板的位移、拉筋的拉力等变化过程为依据,对加筋土挡土墙的工作机理进行了探索。测试结果分析表明:加筋土挡土墙通过发生一定的侧向位移使拉筋发挥作用;墙面板所受的土压力随着竖向土压力的变化而变化,呈现先增大再减小的过程;拉筋对土体的侧限作用发挥到一定程度后,墙面板的土压力将要开始随着拉筋内力的增大而减小;拉筋的内力越大,拉筋对土体的侧限作用发挥越充分,墙面板的位移增加越缓慢。
On the basis of previous studies,Earth Retaining Wall Testing Prototype was improved.According to the transformation process of different earth pressure of an overloaded Shingle nail,displacement of a Shingle nail and the tension of Lacing Wire,the Matrix Raid of Reinforced Earth Retaining Wall is explored.The analysis of the testing results shows: Reinforced Earth Retaining Wall enables lacing wire to work by a certain lateral displacement.Earth pressure of Shingle nails changes with the shift of Vertical earth pressure,showing a process of increasing firstly and decreased then.When the Lateral Restraint Function of Lacing Wire goes to a certain extent,the earth pressure of the Shingle nail will decrease with the increase of internal force of Lacing Wire.The stronger the internal force of Lacing Wire is,the fuller the Lateral Restraint Function of Lacing Wire is,and the slower the replacement of the Shingle nail is.
On the basis of previous studies,Earth Retaining Wall Testing Prototype was improved.According to the transformation process of different earth pressure of an overloaded Shingle nail,displacement of a Shingle nail and the tension of Lacing Wire,the Matrix Raid of Reinforced Earth Retaining Wall is explored.The analysis of the testing results shows: Reinforced Earth Retaining Wall enables lacing wire to work by a certain lateral displacement.Earth pressure of Shingle nails changes with the shift of Vertical earth pressure,showing a process of increasing firstly and decreased then.When the Lateral Restraint Function of Lacing Wire goes to a certain extent,the earth pressure of the Shingle nail will decrease with the increase of internal force of Lacing Wire.The stronger the internal force of Lacing Wire is,the fuller the Lateral Restraint Function of Lacing Wire is,and the slower the replacement of the Shingle nail is.
引文
[1]段天华,姚昌荣.加筋土挡土墙现行设计中安全稳定性的探讨(J).路基工程,2004,(1):74-77.
[2]李敏.地震地区西(安)成(都)高速铁路路基设计(J).路基工程,2010,增刊:104-108.
[3]李庆海,潘樾富,蒋楚生.高烈度地震区路基新型(改进)支挡结构设计的探讨(J).铁道工程学报,2008,增刊:248-251.
[4]南京水利科学研究院土工研究所.土工试验技术手册(M).北京:人民交通出版社,2003.
[5]高江平,石兆旭,俞茂宏.网状与条带式加筋土挡墙墙面位移的测试(J).长安大学学报,2005,25(2):42-45.
[6]张孟喜,孙遇祺,李国祥.加筋土挡墙工作机理的室内试验研究(J).铁道学报,1999,21(5):79-82.
[7]刘华北,Ling H I.土工格栅加筋土挡墙设计参数的弹塑性有限元研究(J).岩土工程学报,2004,26(5):668-673.
[8]高江平,俞茂宏,胡长顺等.加筋土挡墙土压力及土压力系数分布规律研究(J).岩土工程学报,2003,25(5):582-584.
[9]吴雄志.加筋土挡土墙拉筋最大拉力的确定(J).岩土工程学报,1992,14(5):101-106.
[2]李敏.地震地区西(安)成(都)高速铁路路基设计(J).路基工程,2010,增刊:104-108.
[3]李庆海,潘樾富,蒋楚生.高烈度地震区路基新型(改进)支挡结构设计的探讨(J).铁道工程学报,2008,增刊:248-251.
[4]南京水利科学研究院土工研究所.土工试验技术手册(M).北京:人民交通出版社,2003.
[5]高江平,石兆旭,俞茂宏.网状与条带式加筋土挡墙墙面位移的测试(J).长安大学学报,2005,25(2):42-45.
[6]张孟喜,孙遇祺,李国祥.加筋土挡墙工作机理的室内试验研究(J).铁道学报,1999,21(5):79-82.
[7]刘华北,Ling H I.土工格栅加筋土挡墙设计参数的弹塑性有限元研究(J).岩土工程学报,2004,26(5):668-673.
[8]高江平,俞茂宏,胡长顺等.加筋土挡墙土压力及土压力系数分布规律研究(J).岩土工程学报,2003,25(5):582-584.
[9]吴雄志.加筋土挡土墙拉筋最大拉力的确定(J).岩土工程学报,1992,14(5):101-106.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心