摘要
以江西省吉安市井冈山经济技术开发区深圳大桥井吉铁路跨线桥为依托,根据桥梁上跨井吉铁路和桥位处岩溶地层发育的特点,提出综合采用弹性波CT法探测溶洞发育、超大直径空心桩替代钻孔灌注桩及桩底注浆加固等技术措施,解决了复杂岩溶地层桥梁桩基础设计、施工中的诸多难题。介绍目前国内最大直径桥梁桩基础——φ15 m超大直径空心桩在复杂岩溶地层中的应用。
Based on Jinggangshan-Ji＇an railway overpass bridge of Shenzhen bridge in Jinggangshan economic and technological development zone in Ji＇an city, Jiangxi province, according to characteristics of bridge overpass railway and karst formations developing in situ, some technical measures are proposed to solve the difficulties in the design and construction of bridge pile foundation in complicated karst stratum. The measures include an elastic wave CT method in detecting karst conditions, the use of super large diameter hollow pile foundation to replace bored pile, and application of grouting reinforcement under foundation bottom. The proposed measures can solve pile problems in complicated karst formations, and Ф 15 m super-large-diameter hollow pile is also the largest diameter pile foundation in bridge.
出处
《水运工程》
北大核心
2014年第2期180-184,203,共6页
Port & Waterway Engineering
关键词
超大直径空心桩
钻孔灌注桩
复杂岩溶地层
弹性波CT法
注浆加固
super-large-diameter hollow pile foundation
bored pile
complicated karst stratum
elasticwave CT method
grouting reinforcement
