基于概率分析的抗滑桩极限承载能力研究  

Research on the ultimate bearing capacity of anti-slide piles based on probability analysis

作　　者：黄科 HUANG Ke(Southwest Municipal Engineering Design&Research Institute of China,Sichuan Chengdu 610213,China)

机构地区：[1]中国市政工程西南设计研究总院有限公司,四川成都610213

出　　处：《西南给排水》2024年第6期49-53,48,共6页Southwest Water & Wastewater

摘　　要：本文提出了一种抗滑桩极限承载能力概率计算方法。首先通过受力分析搭建了桩体极限承载能力计算模型及桩身最大弯矩计算模型,其次基于蒙特卡洛(Monte-Carlo)模拟方法开展抗滑桩失效概率计算,最后采用控制变量法讨论了桩体材料、桩体尺寸等主要因素对抗滑桩极限承载能力的影响规律。结果表明:抗滑桩失稳概率随着桩体极限承载能力的降低而增加,所建概率模型充分考虑了施工因素或人为因素等随机因素具有更高的可信度。抗滑桩极限承载能力与桩身混凝土强度、钢筋强度、截面尺寸成正相关,随着桩间距及悬臂段长度增加,抗滑桩所提供的桩体极限承载能力将不断减小。This article proposed a probabilistic calculation method for the ultimate bearing capacity of anti-slide piles.Firstly,a calculation model for the ultimate bearing capacity and the maximum ben-ding moment of piles were established through force analysis.Secondly,based on the Monte-Carlo sim-ulation method,the failure probability of anti-slide piles was calculated.Finally,the control variable method was used to discuss the influence of main factors such as pile material and pile size on the ulti-mate bearing capacity of anti-slide piles.The results indicate that the probability of instability of anti-slide piles increases as the ultimate bearing capacity of the pile decreases.The probability model con-structed has higher credibility due to fully considering random factors such as construction factors or hu-man factors.The ultimate bearing capacity of anti-slide piles is positively correlated with the concrete strength,steel reinforcement strength,and cross-sectional size of the piles.As the distance between piles and the length of the cantilever section increase,the ultimate bearing capacity provided by anti-slide piles will continue to decrease.

关 键 词：抗滑桩 承载能力 蒙特卡洛 概率分析 

分 类 号：TU4[建筑科学—土工工程]