摘要
黄土地区,沟壑纵横、地形陡峻,起伏较大且表层覆盖黄土层。山区桥梁最重要的设计特点在于基础条件的复杂,在陡坡上设计墩台是桥梁设计的一大难题。基础的设计需综合考虑山坡的土质、梁跨形式、墩台式样、地质、基底以下坡体和基底以上墩台侧面山坡的稳定性以及相邻墩台埋深的影响。对陡坎地形处桥梁桩基础提出按边坡稳定条件计算自由桩长、按群桩基础考虑侧向水平力的设计方法。
Loess terrain features steep topography,gullies and loess covered layers.The most important specialties of mountain bridge design are complex basic conditions,and the piles and abutments in steep slopes are big problems in the design of bridges.It is necessary to consider the soil,bridge span forms,pile and abutment styles,geology,the stability of slope below the foundation base and beside the piles,the embedded depth of adjacent piles and abutments in foundation design.For the bridge pile foundation located in steep terrain,it is proposed that the free pile length should be calculated according to the conditions of slope stability,the transverse force should be considered on the basis of groups of pile foundation.
出处
《铁道标准设计》
北大核心
2011年第9期40-42,47,共4页
Railway Standard Design
关键词
黄土
陡坡
桥梁桩基
自由桩长
侧向水平力
铁路桥
Loess
Steep slope
Bridge pile foundation
Free pile length
Transverse force
Railway bridges