基坑底预制混凝土定型化垫层的施工技术应用

Construction Application of Precast Concrete Typified Cushion at Foundation Pit Bottom

为缩短施工时效,避免在运营中的地铁区间隧道上方进行大面积基坑开挖而可能对隧道安全造成的影响,对基坑底采用了预制混凝土定型化垫层的施工新技术。经实际工程验证,改进后的预制混凝土定型化垫层施工技术具有良好的社会效益和经济效益,可供类似工程参考。

To shorten the construction time and avoid the possible impact on tunnel safety caused by large-scale foundation pit excavation above the subway tunnel in operation,the new construction technology of precast concrete typified cushion at foundation pit bottom is adopted.The practical engineering verifies that the improved construction technology of precast concrete typified f cushion has good social and economic benefits,which can be used as a reference for similar projects.