嵌岩抗滑桩地基水平抗力系数K值取值的数值模拟研究
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摘要
弹性地基梁"K"法是抗滑桩桩身内力计算的一种重要方法。针对"K"法中抗滑桩嵌固段岩体地基水平抗力系数K值取值主要采用经验值且随意性较大的问题,基于温克尔弹性地基力学模型,通过数值模拟及统计分析,建立了具有较高拟合度的抗滑桩嵌固段岩体地基水平抗力系数K值与岩体弹性模量和泊松比的函数关系式,并结合具体工程实例,将上述研究成果应用于秭归县谭家湾滑坡抗滑桩的优化设计,降低了工程造价。
The "K" method for elastic foundation beams is an important method for calculating the internal forces of anti-slide piles.But the horizontal resistance coefficient K of anti-slide pile foundation embedded in rock in "K" method is mainly empirical and random.Based on Winkler elastic foundation mechanics model and numerical simulation and statistical analysis,this paper establishes a functional relationship between K value of anti-slide pile foundation embedded in rock and elastic modulus and Poisson's ratio of rock mass.Combining with specific engineering examples,the results are applied to the optimum design of anti-slide piles of Tanjiawan landslide in Zigui County,which reduces the project cost.
The "K" method for elastic foundation beams is an important method for calculating the internal forces of anti-slide piles.But the horizontal resistance coefficient K of anti-slide pile foundation embedded in rock in "K" method is mainly empirical and random.Based on Winkler elastic foundation mechanics model and numerical simulation and statistical analysis,this paper establishes a functional relationship between K value of anti-slide pile foundation embedded in rock and elastic modulus and Poisson's ratio of rock mass.Combining with specific engineering examples,the results are applied to the optimum design of anti-slide piles of Tanjiawan landslide in Zigui County,which reduces the project cost.
引文
[1] 铁道部第二勘测设计院.抗滑桩设计与计算[M].北京:中国铁道出版社,1983.
[2] 吴恒立.推力桩计算方法的研究[J].土木工程学报,1995(2):20-28.
[3] 杨佑发,许绍乾.锚索抗滑桩内力计算的有限差分“K-K”法[J].岩土力学,2003,24(1):61-64.
[4] 胡晓军,王建国.弹性抗滑桩锚固段内力计算的反力荷载法[J].工程地质学报,2007,15(2):244-248.
[5] 胡晓军,谭晓惠.弹性抗滑桩全桩内力计算的地基反力荷载法[J].岩土力学,2010,31(1):299-303.
[6] 佴磊,马丽英,冷曦晨,等.滑坡治理中的抗滑桩设计[J].吉林大学学报(地球科学版),2002,32(2):162-165.
[7] 戴自航,沈蒲生.抗滑桩内力计算悬臂桩法的改进[J].湖南大学学报(自然科学版),2003,30(3):81-85.
[8] 戴自航,彭振斌.基于抗滑桩内力计算“m”法的有限差分法[J].中南工业大学学报(自然科学版),2001,32(5):461-464.
[9] 焦世杰,苏爱军,何啸.弹性抗滑桩桩底支承条件对其内力和位移的影响分析[J].安全与环境工程,2018,25(1):39-44.
[10]王薇,徐志诚,邓清禄.滑坡治理抗滑桩内力监测方法与数据处理[J].安全与环境工程,2010,17(2):5-8.
[11]董捷,刘世安,董荣书,等.抗滑桩锚固段地基侧向抗力系数KH的取值分析[J].贵州工业大学学报(自然科学版),2005,34(3):130-133.
[2] 吴恒立.推力桩计算方法的研究[J].土木工程学报,1995(2):20-28.
[3] 杨佑发,许绍乾.锚索抗滑桩内力计算的有限差分“K-K”法[J].岩土力学,2003,24(1):61-64.
[4] 胡晓军,王建国.弹性抗滑桩锚固段内力计算的反力荷载法[J].工程地质学报,2007,15(2):244-248.
[5] 胡晓军,谭晓惠.弹性抗滑桩全桩内力计算的地基反力荷载法[J].岩土力学,2010,31(1):299-303.
[6] 佴磊,马丽英,冷曦晨,等.滑坡治理中的抗滑桩设计[J].吉林大学学报(地球科学版),2002,32(2):162-165.
[7] 戴自航,沈蒲生.抗滑桩内力计算悬臂桩法的改进[J].湖南大学学报(自然科学版),2003,30(3):81-85.
[8] 戴自航,彭振斌.基于抗滑桩内力计算“m”法的有限差分法[J].中南工业大学学报(自然科学版),2001,32(5):461-464.
[9] 焦世杰,苏爱军,何啸.弹性抗滑桩桩底支承条件对其内力和位移的影响分析[J].安全与环境工程,2018,25(1):39-44.
[10]王薇,徐志诚,邓清禄.滑坡治理抗滑桩内力监测方法与数据处理[J].安全与环境工程,2010,17(2):5-8.
[11]董捷,刘世安,董荣书,等.抗滑桩锚固段地基侧向抗力系数KH的取值分析[J].贵州工业大学学报(自然科学版),2005,34(3):130-133.