This paper has presented the construction technique of the assembling in site about the large-span steel pipe roof truss and the technique of integral lifting about the truss.
本文主要介绍大跨度钢管桁架的现场拼装和整体提升的施工技术措施。
The paper discussed common problems of pipe roof support engineering in soft ground and presented the optimization technology by tests on borehole construction methods with existing equipments.
在软弱土层管棚支护工程中，利用现有设备试验了多种成孔方法，优选出最佳成孔法，加快了工程进度。
Pipe roof support is an assisted method of shallow tunneling.
管棚支护是浅埋暗挖法施工中的一种辅助工法。
The subway crossing project through Hongxu Road in Shanghai is the pipe-roof project with the biggest cross-section box culvert up to now in the world.
上海市中环线虹许路北虹路下立交工程是目前世界上在饱和含水软土地层中施工的横截面最大的管幕法工程。
For the case of safety, its construction will adopt pipe-roof culvert box jacking method.
为慎重起见，拟采用管幕保护下的顶进法施工。
For the case of safety, its construction will adopt pipe-roof culvert box jacking method.
为慎重起见，拟采用管幕保护下的顶进法施工。
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