摘要
近几十年来,随着城镇化进程的加快,深基坑工程在城市中也逐渐增多,同时考虑经济与性能的基坑支护方法研究就变得尤为重要。基坑斜-直交替支护桩是一种新型无内支撑结构的支护形式,具有良好的应用前景。采用数值模拟的方法,考虑不同的影响因素,对基坑开挖过程中斜-直交替支护桩的力学性能及变形进行了研究。结果表明:采用有限差分软件FLAC3D,结合Plastic-Hardening本构模型,可以很好的分析斜-直交替支护桩在开挖条件下的力学性能及变形情况;土体强度参数越大,倾角越大,斜-直交替支护桩的变形越小,稳定性越好。斜桩越长,直桩的变形越小,最大正、负弯矩越小。
Over the past few decades,with the acceleration of the urbanization process,deep foundation pit engineering has gradually increased in the city,so it become particularly important for studying the foundation pit supporting method with economy and performance.Inclined and vertical piles is a new type of supporting system without internal bracing,which has good applied prospect.The numerical simulation method is used to analyze the mechanical properties and deformation of inclined and vertical piles under different factors.The results show that:Combining the finite difference software FLAC3D and the Plastic-Hardening constitutive model,the mechanical properties and deformation of inclined and vertical piles during the excavation can be analyzed.The larger the soil strength parameter and the inclination angle,the smaller the deformation of the inclined and vertical piles,and the stability of the piles will be better.The longer the inclined pile,the smaller the deformation of the vertical pile,and the maximum positive and negative bending moments will be smaller.
作者
唐扬
张慎
侯慧珍
夏红萤
Tang Yang;Zhang Shen;Hou Huizhen;Xia Hongying(Central South Architectural Design Institute Corporation Limited,Wuhan 430072,P.R.China;Changjiang River Scientific Research Institute,Changjiang Water Resources Commission,Wuhan 430071,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2023年第S02期778-784,803,共8页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(42107160)
关键词
斜-直交替支护桩
数值模拟
力学性能
影响因素
inclined-vertical piles
numerical simulation
mechanical property
influence factors
