摘要
研究目的:基于周边城市建筑及环境对道路工程修建的影响以及对支挡结构的高度、安全可靠性等方面的要求,研究提出了包括多个锚固桩、横撑,并通过横撑固定连接,从而形成整体"框架型深路堑桩板挡土墙"新型结构。计算研究采用解析方法及有限元软件分别对框架式桩板挡土墙进行二维整体稳定性和三维整体稳定性的模拟计算,并对不同计算方式的计算结果进行对比分析以确保计算结果的可靠性。研究结论:(1)框架式H型桩板挡土墙在对应桩体锚固点的路基下部采用和桩体现浇固定连接方式设置了横撑,增加了结构的整体性和安全性;(2)结构横撑承担了部分弯矩、剪力和轴力,减轻了桩体的负担并限制了桩板结构向堑内的水平向变形,横撑同"埋入式桩板结构地基处理"的结合设置有效地控制了路基的沉降,提高了地基承载力;(3)新结构应用于岩土工程领域,实现了土质条件下的超高支挡,可确保工程稳定,社会效益及经济效益明显。
Research purposes： Based on the impact of the surrounding urban architecture and environment on the road construction and the requirements of the height, safety and reliability of retaining structure, this paper proposed a new structure of ＂frame pile - slab retaining wall in deep cutting＂ includes multiple anchor piles and transverse bracings, by which the structure are fixedly connected. Drawing on the experience of calculation on the retaining of sheet - pile wall, this paper uses analytic method and finite element software in 2D and 3D view separately to study the overall stability of frame pile- slab retaining wall, and then the results calculated by different methods are compared and analyzed to ensure the reliability. Research conclusions： （ 1 ） By using the pile - slab retaining wall of type H the transverse bracings connected by the cast - in - place concrete with piles are set in the lower part of subgrade to increase the integrity and safety of the structure. （ 2 ） Using the transverse bracing reduces the burden of pile and limits the horizontal deformation which is from pile - slab structure to cut dues to bearing a part of bending moment, shear force and axial force. The combination of transverse bracing and ＂embedded pile - slab structure in foundation treatment＂ also effectively controls the settlement of subgrade and improves the bearing capacity of foundation. （3） Ultra - high retaining under the soil condition is realized by geotechnical engineering application of new structure, which also ensures the engineering stability, and has obvious social and economic benefit.
出处
《铁道工程学报》
EI
北大核心
2016年第6期35-38,71,共5页
Journal of Railway Engineering Society
关键词
新支护结构
框架型桩板挡土墙
深路堑
计算研究
工程应用
new retaining structure
frame pile -slab retaining wall
deep cutting
calculation study
practicalapplication
