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基坑工程对与之相关的轨道交通区间隧道的影响及保护措施直接决定了工程的安全性和经济性。基于“时空效应”原理从基坑分坑设计、支护结构、土体加固、抗拔桩、分块开挖与底板浇筑、信息化施工等多个方面总结了常用的保护措施;梳理现有的影响分析方法,并依托中国博览会会展综合体E区和北横通道两个工程实例进行验证。分析认为:设计采取的保护措施可有效控制变形,可供类似工程参考。
The impact of foundation pit engineering on the tunnels with the relevant rail transit and the protection measures directly determine the safety and economy of the project. Based on the principle of “space-time effect”, the commonly used protective measures are summarized from the pit design, supporting structure, soil reinforcement, uplift piles, block excavation and floor pouring, information construction and so on; The existing impact analysis methods and relying on China Expo Convention and Exhibition Complex E District and North Crossing two examples of projects to verify. Analysis shows that: the protection measures designed to effectively control the deformation, for similar projects for reference.