摘要
成贵铁路菜坝岷江特大桥主桥基础,结合地形、地质特点,北岸河中岸滩采用高水头筑岛围堰技术,南岸水中墩采用石渣筑岛后陆域静压植钢板桩围堰工法,河中墩采用栈桥+钢平台,水上静压植钢板桩围堰技术,克服岩面侵入承台、上覆卵石层等难题,承台、墩身在一个枯水期完成,墩身涨水前施工过汛期防洪水位。钢梁架设采用特制设备从两边向中间悬臂拼装、跨中合龙施工技术,修改航管软件解决航空限高问题。铁路道砟槽板采用场内预制,架桥机安装,梁上结合工艺技术。施工安全、优质、高效、环保。
Combined with the characteristics of topography and geology, and overcoming a lot of difficulties, such as the rock surface intrusion bearing platform, the pebble bed and so on, the foundation of main bridge for Caiba Minjiang Bridge in Chengdu to Guiyang railway line is finished successfully in a dry season with the piers of structure above the flood water level promptly. On the north shore of the river, the construction method of bench is applied with cofferdam using the high water-head filling island. On the south shore, the piers in water using the method of silent steel piling cofferdam after the island built with stones in the land. In the river, the construction method of piers is applied with silent steel piling cofferdam above the water using steel trestle and platform. Steel truss girder now assembles by the method of both sides to the middle span cantilever erection and mid-span closure scheme, modifying aircraft management software to solve the problem of aviation height limit. Railway ballast tank board is constructed through the technology of prefabrication, transportation of bridging machine and girder combination. The whole set of innovative technology is adopted, which is safe, excellent, efficient and environmental.
出处
《施工技术》
CAS
北大核心
2017年第11期1-4,28,共5页
Construction Technology
基金
中国中铁科研项目(桥经[2013]148号):成贵铁路菜坝岷江特大桥大跨度钢桁连续梁建造关键技术研究
关键词
桥梁工程
筑岛围堰
静压植桩
钢桁梁
合龙
施工技术
bridges
island-filling cofferdam
silent steel piling
steel truss girders
closure
construction
