新型重力式-桩基双面板式组合支挡结构工作性状的数值研究  

Numerical Study on Working Performance of a New Gravity-Double Plate with Pile Foundation Composite Retaining Structure

作　　者：欧煜 聂啟仁 周鹏超 OU Yu;NIE Qiren;ZHOU Pengchao(Hunan Chemical Geological Engineering Survey Institute Co.Ltd,,Changsha 410004,China;China Construction Third Engineering Bureau Group Co,Ltd,,Wuhan 430000,China)

机构地区：[1]湖南化工地质工程勘察院有限责任公司,湖南长沙410004 [2]中建三局集团有限公司,湖北武汉430000

出　　处：《石家庄铁道大学学报（自然科学版）》2024年第3期98-105,共8页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

摘　　要：为了对高填方边坡采用新型重力式G桩基双面板式组合支挡结构支护的工作性状进行研究,以某工程实例为背景,采用有限元数值计算软件建立其典型设计剖面的三维有限元计算模型.计算并分析基础桩桩身弯矩、剪力、轴力,高面板弯矩、剪力、土压力,承台弯矩、剪力等分布规律,从而对该种组合支挡结构的工作性状获得较全面的认识.同时,基于数值计算与分析的结论,提出一系列有益于工程实践的措施.通过软件自带的有限元强度折减法,计算了支护体系的整体稳定安全系数.结果表明,该种新型组合支挡结构具备可靠的支护能力.支护结构参数优化分析表明,扶肋板在调节高面板弯矩的分布规律方面发挥重要作用,当其高度设置在0.50H~0.75H时,可以更好地调动高面板发挥抗弯承载力;边坡整体安全系数随基础桩长度增加而逐渐增大,当桩长增加到约1.5倍边坡高度后,继续增加其长度,安全系数增大不明显.In order to reveal the working perlormance of the new Gravity-Double plate with pile foundation composite retaining structure for high fill slope,based on a practical engineering example.the three-dimensional finite element calculation model of a design profile of the retaining structure was established by using the finite element numerical calculation software.The working performance of the new composite retaining structure was comprehensively understood by analyzing the distribution laws ol the bending moment,shear force and the axial force of the foundation piles,the bending moment,shear force and the earth pressure of the higher-plate,the bending moment and shear force of the pile-cap Meanwhile,on the basis of the numerical calculation and analysis,a series of measures benelicial to engi neering practice were proposed,Using the strength reduction finite element method embedded in the software,the safety factor of the earth-retaining system was computed,The results show that the new composite retaining structure has higher stability and reliable earth-retaining capability,The optimiza tion of parameters shows that the buttress plate plays an important role in adjusting the bending moment distribution of the higher plate,and the anti-bending bearing of the higher plate capacity can be mobi lized better when the height of the higher plate is set between 0.50H and 0.75H;The overall safety fac tor of slope increases with the increasing of the pile length,but when the pile length increase to the 1.5 times of the slope height,the overall safety factor will not increase obviously by further increasing the pile length.

关 键 词：高填方边坡 新型组合支挡结构 数值分析 工作性状 

分 类 号：TU753[建筑科学—建筑技术科学]