基于上限极限分析多滑块临坡地基承载力计算
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摘要
鉴于目前临坡地基承载力计算仍不成熟,考虑斜坡与平地地基破坏模式的异同建立出多滑块临坡地基破坏模式和相应速度场,采用上限极限分析法推导出临坡地基承载力表达式,在此基础上通过数值优化计算获得了坡角、土体内摩擦角和基础相对位置与临坡地基承载力之间的变化规律,通过本文方法、相关文献资料和工程实例进行对比分析,表明本文方法具有一定合理性和可行性。本文方法为工程人员从事临坡基础工程建设提供了一定的理论依据。
In view of the fact that the calculation of bearing capacity of ground adjacent to slope is still immature at present,the failure mode and corresponding velocity field of multi-slide ground adjacent to slope are established considering the similarities and differences of failure modes between slope and ground foundation. The upper limit analysis method is used to derive the bearing capacity formula. Based on it,the changing rules of slope angle,soil friction angle and relative position of foundation with bearing capacity of slope foundation respectively are obtained by numerical optimization calculation. The comparative analysis of the related literature,engineering example and the method of this paper shows this method has certain rationality and feasibility. The method of this paper provides some theoretical basis for engineering staffs engaged in the construction of ground adjacent to slope
In view of the fact that the calculation of bearing capacity of ground adjacent to slope is still immature at present,the failure mode and corresponding velocity field of multi-slide ground adjacent to slope are established considering the similarities and differences of failure modes between slope and ground foundation. The upper limit analysis method is used to derive the bearing capacity formula. Based on it,the changing rules of slope angle,soil friction angle and relative position of foundation with bearing capacity of slope foundation respectively are obtained by numerical optimization calculation. The comparative analysis of the related literature,engineering example and the method of this paper shows this method has certain rationality and feasibility. The method of this paper provides some theoretical basis for engineering staffs engaged in the construction of ground adjacent to slope
引文
[1]MeyerhofGG,Sc D,M E I C,et al.The ultimate bearing capacity of foundation on slopes[C]//Proceeding of the 4th International Conference on Soil Mechanics,1957:384-386.
[2]Shield R T,Drucker D C.The application of limit analysis to punch-indentation problems[J].Transactions,Journal of Applied Mechanics,1953,75(3):453-460.
[3]Hansen B,Christensen N H.Discussion of“Theoretical bearing capacity of very shallow footings”by A.L.Larkin[J].Journal of Soil Mechanics and Foundations Division,1969,95(SM6):1567-1568.
[4]王晓谋,徐守国.斜坡上的地基承载力的有限元分析[J].长安大学学报,1993(3):13-17.
[5]Saran S,Sud V K,Handa S C.Bearing capacity of footings adjacent to slopes[J].Journal of Geotechnical Engineering,1989,115(4):553-573.
[6]Saran S,Agarwal R K.Bearing capacity of eccentrically obliquely loaded footing[J].Journal of Geotechnical Engineering,1991,117(11):1669-1690.
[7]张玉成,杨光华,胡海英,等.在软土地基上有反压护道路堤及堤坝的稳定计算[J].岩土力学,2007(s1):844-848.
[8]杨峰,阳军生,张学明,等.斜坡地基单侧滑移破坏模式与承载力上限解[J].工程力学,2010,27(6):162-167.
[9]尉学勇,张晓谋,怀超.斜坡地基极限承载力上限解计算与分析[J].岩土程学报,2010,32(3):381-387.
[10]尉学勇.斜坡地基承载力的仿真分析与理论计算[D].西安:长安大学,2003.
[11]王红雨,杨敏.临近基坑矩形浅基础地基极限承载力上限估算[J].岩土工程学报,2005,27(10):1116-1122.
[12]Chen W F.Limit analysis and soil plasticity[M].Amsterdam:Elsevier,1975.
[13]胡卫东,曹文贵,袁青松.基于非线性破坏准则的临坡地基承载力上限分析[J].岩土力学,2017,38(6):1639-1646.
[14]任佳,巩立国.降雨模式对土质边坡稳定性的影响[J].人民黄河,2016,,38(4):85-88.
[15]徐佩洪,许彬,董天文.螺杆桩基础静载荷试验与承载力分析[J].交通科学与工程,2016,32(3):58-62.
[2]Shield R T,Drucker D C.The application of limit analysis to punch-indentation problems[J].Transactions,Journal of Applied Mechanics,1953,75(3):453-460.
[3]Hansen B,Christensen N H.Discussion of“Theoretical bearing capacity of very shallow footings”by A.L.Larkin[J].Journal of Soil Mechanics and Foundations Division,1969,95(SM6):1567-1568.
[4]王晓谋,徐守国.斜坡上的地基承载力的有限元分析[J].长安大学学报,1993(3):13-17.
[5]Saran S,Sud V K,Handa S C.Bearing capacity of footings adjacent to slopes[J].Journal of Geotechnical Engineering,1989,115(4):553-573.
[6]Saran S,Agarwal R K.Bearing capacity of eccentrically obliquely loaded footing[J].Journal of Geotechnical Engineering,1991,117(11):1669-1690.
[7]张玉成,杨光华,胡海英,等.在软土地基上有反压护道路堤及堤坝的稳定计算[J].岩土力学,2007(s1):844-848.
[8]杨峰,阳军生,张学明,等.斜坡地基单侧滑移破坏模式与承载力上限解[J].工程力学,2010,27(6):162-167.
[9]尉学勇,张晓谋,怀超.斜坡地基极限承载力上限解计算与分析[J].岩土程学报,2010,32(3):381-387.
[10]尉学勇.斜坡地基承载力的仿真分析与理论计算[D].西安:长安大学,2003.
[11]王红雨,杨敏.临近基坑矩形浅基础地基极限承载力上限估算[J].岩土工程学报,2005,27(10):1116-1122.
[12]Chen W F.Limit analysis and soil plasticity[M].Amsterdam:Elsevier,1975.
[13]胡卫东,曹文贵,袁青松.基于非线性破坏准则的临坡地基承载力上限分析[J].岩土力学,2017,38(6):1639-1646.
[14]任佳,巩立国.降雨模式对土质边坡稳定性的影响[J].人民黄河,2016,,38(4):85-88.
[15]徐佩洪,许彬,董天文.螺杆桩基础静载荷试验与承载力分析[J].交通科学与工程,2016,32(3):58-62.