考虑位移影响的土压力非线性计算
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摘要
极限土压力理论计算结果与工程实测数据偏差较大。为解决该问题,以朗肯土压力理论为出发点,借鉴双参数法思想,提出了一种考虑位移影响且同时适用于黏土和砂土的主、被动土压力计算方法,利用试验数据对本文方法进行了验证;将本文土压力计算方法与地下结构弯曲微分方程相结合,通过迭代即可得到地下结构的内力及变形,通过算例对该过程进行了分析说明。
There is much difference between the calculated results of ultimate earth pressure theory and the experimental ones.To solve this problem, based on the Rankine's earth pressure theory and the two-parameter method, an earth pressure method considering displacement effect, which can calculate active and passive earth pressures for both cohesive soil and non-cohesive soil, is proposed and validated by the experimental data. By combining the earth pressure method with the bending differential equation of underground structures, the internal force and displacement of the underground structures can be obtained through iteration. The process is analyzed by an example.
There is much difference between the calculated results of ultimate earth pressure theory and the experimental ones.To solve this problem, based on the Rankine's earth pressure theory and the two-parameter method, an earth pressure method considering displacement effect, which can calculate active and passive earth pressures for both cohesive soil and non-cohesive soil, is proposed and validated by the experimental data. By combining the earth pressure method with the bending differential equation of underground structures, the internal force and displacement of the underground structures can be obtained through iteration. The process is analyzed by an example.
引文
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[10]王仕传,孙本杰,邵艳.改进的主动土压力计算方法[J].岩土力学,2015,36(5):1375-1379.(WANG Shi-chuan,SUN Ben-jie,SHAO Yan.Modified computational method for active earth pressure[J].Rock and Soil Mechanics,2015,36(5):1375-1379.(in Chinese))
[11]杨泰华,贺怀建.考虑位移影响的土压力计算理论[J].岩土力学,2010,31(11):3635-3639.(YANG Tai-hua,HEHuai-jian.Earth pressure calculation theory considering displacement effects[J].Rock and Soil Mechanics,2010,31(11):3635-3639.(in Chinese))
[2]OU C Y.Deep excavation:theory and practice[M].London:Taylor and Francis,2006.
[3]杨斌,胡立强.挡土结构侧土压力与水平位移关系的试验研究[J].建筑科学,2000,16(2):14-20.(YANG Bin,HU Li-qiang.Test study on relationship between lateral earth pressure acting on retaining structures and horizontal displacement[J].Building Science,2000,16(2):14-20.(in Chinese))
[4]刘晓立,严驰,吕宝柱,等.柔性挡墙在砂性填土中的土压力试验研究[J].岩土工程学报,1999,21(4):505-508.(LIU Xiao-li,YAN Chi,LU Bao-zhu,et al.An experimental study of earth pressure on retaining wall in sandy soils[J].Chinese Journal of Geotechnical Engineering,1999,21(4):505-508.(in Chinese))
[5]徐日庆,陈页开,杨仲轩,等.刚性挡墙被动土压力模型试验研究[J].岩土工程学报,2002,24(5):569-575.(XURi-qing,CHEN Ye-kai,YANG Zhong-xuan,et al.Experimental research on the passive earth pressure acting on a rigid wall[J].Chinese Journal of Geotechnical Engineering,2002,24(5):569-575.(in Chinese))
[6]陆培毅,严驰,刘润.黏性土基于室内模型试验土压力分布形式的研究[J].建筑结构学报,2002,23(2):83-86.(LU Pei-yi,YAN Chi,LIU Run.Research on distribution of earth pressure of clay obtained from model test in laboratory[J].Journal of Building Structures,2002,23(2):83-86.(in Chinese))
[7]ROSCOE K H.The influence of strains in soil mechanics[J].Géotechnique,1970,20(2):129-170.
[8]岳祖润,彭胤宗,张师德.压实黏性填土挡土墙土压力离心模型试验[J].岩土工程学报,1992,14(6):90-96.(YUEZu-run,PENG Yin-zong,ZHANG Shi-de.Centrifuge model tests on lateral pressure on walls retaining compacted clayed backfill[J].Chinese Journal of Geotechnical Engineering,1992,14(6):90-96.(in Chinese))
[9]ADEL H F,IMAD A K.Passive earth pressure of overconsolidated cohesionless backfill[J].J Geotech Geoenviron Eng,2005,131(8):978-986.
[10]王仕传,孙本杰,邵艳.改进的主动土压力计算方法[J].岩土力学,2015,36(5):1375-1379.(WANG Shi-chuan,SUN Ben-jie,SHAO Yan.Modified computational method for active earth pressure[J].Rock and Soil Mechanics,2015,36(5):1375-1379.(in Chinese))
[11]杨泰华,贺怀建.考虑位移影响的土压力计算理论[J].岩土力学,2010,31(11):3635-3639.(YANG Tai-hua,HEHuai-jian.Earth pressure calculation theory considering displacement effects[J].Rock and Soil Mechanics,2010,31(11):3635-3639.(in Chinese))