摘要
h型抗滑桩是加固边坡的有效措施之一,在以往的研究中,大多数学者选取的研究对象均为直线形边坡,导致研究结果对自然环境中形态各异的边坡缺乏普遍适用性。因此,基于凹形、直线形、凸形、组合形4种坡面形态,从桩位、连梁长度、锚固深度3个方面综合考虑,以安全系数、边坡变形模式、桩身位移、桩身受力情况为分析依据,提出基于不同坡面形态的h型抗滑桩最优加固方案。研究结果表明:组合形坡最稳定、凸形坡最不稳定。凹形坡桩中轴线距坡脚的合理距离为4/5坡长,其余3种坡形的合理距离均为1/5坡长。凹形坡最优连梁长度为3~5倍桩径,直线形坡与凸形坡最优连梁长度为2~3倍桩径,组合形坡最优连梁长度为3~4倍桩径。凹形坡与组合形坡最优锚固深度为2.5倍桩径,直线形坡最优锚固深度为2~3倍桩径,凸形坡最优锚固深度为1.5~2.5倍桩径。研究结果可对边坡抗滑桩加固设计提供参考。
h-type anti-slide pile is one of the effective measures to strengthen the slope.In previous studies,most scholars selected straight-line slope as the research object,leading to the lack of universal applicability to the slope with different forms in the natural environment.Therefore,based on the concave,straight,convex and combined slope forms,the optimal reinforcement scheme of h-type anti-slide pile based on different slope forms was proposed from the comprehensive consideration of pile position,beam length and anchorage depth,and based on the analysis of safety factor,slope deformation mode,pile displacement and pile stress.The results show that the composite slope is the most stable,while the convex slope is the most unstable.The reasonable distance between the central axis of concave slope pile and the foot of slope is 4/5 slope length,and the reasonable distance between the other three slope forms is 1/5 slope length.The optimal connecting beam length of concave slope is 3~5 times of pile diameter,that of straight slope and convex slope are 2~3 times of pile diameter,and that of composite slope is 3~4 times of pile diameter.The optimal anchorage depth of concave slope and composite slope is 2.5 times of pile diameter,the optimal anchorage depth of linear slope is 2~3 times of pile diameter,and the optimal anchorage depth of convex slope is 1.5~2.5 times of pile diameter.The results can provide reference for the reinforcement design of anti-slide piles.
作者
冯震
王博怡
柳浩然
郭涛
沈明
邵谦
FENG Zhen;WANG Bo-yi;LIU Hao-ran;GUO Tao;SHEN Ming;SHAO Qian(College of Civil Engineering and Architecture,Baoding 071002,China;Hebei Civil Engineering Monitoring and Evaluation Technology Innovation Center,Baoding 071002,China)
出处
《科学技术与工程》
北大核心
2022年第30期13467-13476,共10页
Science Technology and Engineering
基金
河北省自然科学基金(E2020201017,E2019201422)
河北省高等学校科学技术研究项目(ZD2020157,QN2020439)。
关键词
h型抗滑桩
坡面形态
加固效果
h-type anti-slide pile
slope morphology
reinforcement effect
