地震条件下黏性土挡土墙土压力分析
|
摘要
Mononobe-Okabe理论是现阶段计算地震土压力的常用方法,但Mononobe-Okabe理论的诸多假设使其具有一定的局限性。针对Mononobe-Okabe理论的不足,考虑到地震作用下挡土墙偏转对土压力的影响,采用斜向条分法推导了复杂条件下黏性土地震土压力强度分布、土压力合力及其作用点位置公式,并利用图解法给出了临界破裂角的解析解。研究表明:填土黏聚力和地震系数对土压力影响显著;忽略黏性填土表面开裂与地震作用对均布超载及开裂填土等效超载的影响将使主动土压力计算结果偏小,其误差随着填土黏聚力和均布超载的增大而增大;在不同水平地震系数下土压力沿墙高呈非线性分布;所提公式适用范围更广,有效完善了Mononobe-Okabe理论。
Mononobe-Okabe theory is a widely used method to calculate seismic earth pressure at present; but some hypotheses of which have certain limitations. In light of the deficiency of Mononobe-Okabe theory, and considering the effect of retaining wall deflection on earth pressure, the diagonal slice method is used to deduce the strength distribution of seismic cohesive earth pressure under complex states; earth pressure resultant and its action point. The analytical solution of critical rupture angle is given with graphical method. Research results show that fill cohesion and seismic coefficient influence earth pressure signally; ignoring the surface cracking of cohesive fill and the impact of the earthquake on the uniform overload and the crack fill equivalent overload would make the result of active earth pressure turn small, whose deviation would turn big as fill cohesion and uniform overload goes up; earth pressure is in linear distribution along the height of wall in different horizontal seismic coefficients; the given formula fits wider situations, and effectively improves the Mononobe-Okabe theory.
Mononobe-Okabe theory is a widely used method to calculate seismic earth pressure at present; but some hypotheses of which have certain limitations. In light of the deficiency of Mononobe-Okabe theory, and considering the effect of retaining wall deflection on earth pressure, the diagonal slice method is used to deduce the strength distribution of seismic cohesive earth pressure under complex states; earth pressure resultant and its action point. The analytical solution of critical rupture angle is given with graphical method. Research results show that fill cohesion and seismic coefficient influence earth pressure signally; ignoring the surface cracking of cohesive fill and the impact of the earthquake on the uniform overload and the crack fill equivalent overload would make the result of active earth pressure turn small, whose deviation would turn big as fill cohesion and uniform overload goes up; earth pressure is in linear distribution along the height of wall in different horizontal seismic coefficients; the given formula fits wider situations, and effectively improves the Mononobe-Okabe theory.
引文
[1]OKABE S.General theory of earth pressure[J].Journal of the Japanese Society of Civil Engineers,1926,12(1):123-134.
[2]MONONOBE N.Considerations into earthquake vibrations and vibration theories[J].Journal of the Japanese Society of Civil Engineers,1924,10(5):1063-1094.
[3]SEED H B,WHITMAN R V.Design of earth retaining structures for dynamic loads[C]//Special Conference On Lateral Stresses Ground Design Earth-Retaining Structures.New York:[s.n.],1970:103-147.
[4]SHERIF M A,FANG Y S.Dynamic earth pressures on walls rotating about the top[J].Soils and Foundations,1984,24(4):109-117.
[5]RICHARDS R,HUANG C J,FISHMAN K L.Seismic earth pressure on retaining structure[J].Journal of Geotechnical and Geoenvironmental Engineering,1999,125(9):771-778.
[6]CHOUDHURY D,SINGH S.New approach for estimation of static and seismic active earth pressure[J].Geotechnical and Geological Engineering,2006,24(1):117-127.
[7]杨剑,高玉峰,程永锋,等.地震条件下倾斜挡土墙被动土压力研究[J].岩土工程学报,2009,31(9):1391-1397.YANG Jian,GAO Yu-feng,CHENG Yong-feng,et al.Passive earth pressure of inclined retaining walls under seismic condition[J].Chinese Journal of Geotechnical Engineering,2009,31(9):1391-1397.
[8]朱桐浩.在地震荷载作用下挡土墙主动土压力[J].四川建筑科学研究,1981,(3):37-44.ZHU Tong-hao.Seismic active earth pressure on a retaining wall[J].Building Seismic Research of Sichuan,1981,(3):37-44.
[9]夏唐代,孔祥冰,王志凯,等.挡土墙后黏性土的地震主动土压力分析[J].岩石力学与工程学报,2012,31(增刊1):3188-3195.XIA Tang-dai,KONG Xiang-bing,WANG Zhi-kai,et al.Analysis of seismic active earth pressure of cohesive soil behind retaining wall[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(Supp.1):3188-3195.
[10]张永兴,陈林.地震作用下挡土墙主动土压力分布[J].深圳大学学报(理工版),2012,29(1):31-37.ZHANG Yong-xing,CHEN Lin.Seismic active earth pressure of retaining wall[J].Journal of Shenzhen University(Science and Engineering),2012,29(1):31-37.
[11]林宇亮,杨果林,赵炼恒.地震条件下挡墙后黏性土主动土压力研究[J].岩土力学,2011,32(8):2479-2486.LIN Yu-liang,YANG Guo-lin,ZHAO Lian-heng.Active earth pressure of cohesive soil behind retaining wall[J].Rock and Soil Mechanics,2011,32(8):2479-2486.
[12]王立强,王元战,迟丽华.挡土墙地震土压力及其分布[J].中国港湾建设,2007,(5):1-5.WANG Li-qiang,WANG Yuan-zhan,CHI li-hua.Distibution of seismic soil pressure on a retaining wall[J].China Harbour Engineering,2007,(5):1-5.
[13]孙勇.地震条件下挡土墙主动土压力及其分布的统一解[J].岩土力学,2012,33(1):255-261.SUN Yong.Unified solution of seismic active earth pressure and its distribution on a retaining wall[J].Rock and Soil Mechanics,2012,33(1):255-261.
[14]GHOSH S,SHARMA R P.Pseudo-dynamic active response of non-vertical retaining wall supporting c-?backfill[J].Geotechnical and Geological Engineering,2010,28(5):633-641.
[15]顾慰慈.挡土墙土压力计算手册[M].北京:中国建材工业出版社,2004.
[16]焦方辉,姚令侃,蒋良潍等.岩石场地重力式挡土墙地震土压力振动台实验研究[J].防灾减灾工程学报,2011,31(3):316-321.JIAO Fang-hui,YAO Ling-kan,JIANG Liang-wei,et al.Shaking table model experimental study on seismic soil pressure of GRW on rock site[J].Journal of Disaster Prevention and Mitigation Engineering,2011,31(3):316-321.
[2]MONONOBE N.Considerations into earthquake vibrations and vibration theories[J].Journal of the Japanese Society of Civil Engineers,1924,10(5):1063-1094.
[3]SEED H B,WHITMAN R V.Design of earth retaining structures for dynamic loads[C]//Special Conference On Lateral Stresses Ground Design Earth-Retaining Structures.New York:[s.n.],1970:103-147.
[4]SHERIF M A,FANG Y S.Dynamic earth pressures on walls rotating about the top[J].Soils and Foundations,1984,24(4):109-117.
[5]RICHARDS R,HUANG C J,FISHMAN K L.Seismic earth pressure on retaining structure[J].Journal of Geotechnical and Geoenvironmental Engineering,1999,125(9):771-778.
[6]CHOUDHURY D,SINGH S.New approach for estimation of static and seismic active earth pressure[J].Geotechnical and Geological Engineering,2006,24(1):117-127.
[7]杨剑,高玉峰,程永锋,等.地震条件下倾斜挡土墙被动土压力研究[J].岩土工程学报,2009,31(9):1391-1397.YANG Jian,GAO Yu-feng,CHENG Yong-feng,et al.Passive earth pressure of inclined retaining walls under seismic condition[J].Chinese Journal of Geotechnical Engineering,2009,31(9):1391-1397.
[8]朱桐浩.在地震荷载作用下挡土墙主动土压力[J].四川建筑科学研究,1981,(3):37-44.ZHU Tong-hao.Seismic active earth pressure on a retaining wall[J].Building Seismic Research of Sichuan,1981,(3):37-44.
[9]夏唐代,孔祥冰,王志凯,等.挡土墙后黏性土的地震主动土压力分析[J].岩石力学与工程学报,2012,31(增刊1):3188-3195.XIA Tang-dai,KONG Xiang-bing,WANG Zhi-kai,et al.Analysis of seismic active earth pressure of cohesive soil behind retaining wall[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(Supp.1):3188-3195.
[10]张永兴,陈林.地震作用下挡土墙主动土压力分布[J].深圳大学学报(理工版),2012,29(1):31-37.ZHANG Yong-xing,CHEN Lin.Seismic active earth pressure of retaining wall[J].Journal of Shenzhen University(Science and Engineering),2012,29(1):31-37.
[11]林宇亮,杨果林,赵炼恒.地震条件下挡墙后黏性土主动土压力研究[J].岩土力学,2011,32(8):2479-2486.LIN Yu-liang,YANG Guo-lin,ZHAO Lian-heng.Active earth pressure of cohesive soil behind retaining wall[J].Rock and Soil Mechanics,2011,32(8):2479-2486.
[12]王立强,王元战,迟丽华.挡土墙地震土压力及其分布[J].中国港湾建设,2007,(5):1-5.WANG Li-qiang,WANG Yuan-zhan,CHI li-hua.Distibution of seismic soil pressure on a retaining wall[J].China Harbour Engineering,2007,(5):1-5.
[13]孙勇.地震条件下挡土墙主动土压力及其分布的统一解[J].岩土力学,2012,33(1):255-261.SUN Yong.Unified solution of seismic active earth pressure and its distribution on a retaining wall[J].Rock and Soil Mechanics,2012,33(1):255-261.
[14]GHOSH S,SHARMA R P.Pseudo-dynamic active response of non-vertical retaining wall supporting c-?backfill[J].Geotechnical and Geological Engineering,2010,28(5):633-641.
[15]顾慰慈.挡土墙土压力计算手册[M].北京:中国建材工业出版社,2004.
[16]焦方辉,姚令侃,蒋良潍等.岩石场地重力式挡土墙地震土压力振动台实验研究[J].防灾减灾工程学报,2011,31(3):316-321.JIAO Fang-hui,YAO Ling-kan,JIANG Liang-wei,et al.Shaking table model experimental study on seismic soil pressure of GRW on rock site[J].Journal of Disaster Prevention and Mitigation Engineering,2011,31(3):316-321.
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