树根桩与静压注浆复合地基在某高速公路既有通道地基加固处理中的应用

复合地基是加固区由基体和增强体两部分组成的人工地基。本文结合工程实例,分析了某高速公路既有通道开裂的原因,提出了采用树根桩与静压注浆相结合进行地基加固的治理方案,先通过静压注浆使土层强行固结,形成承载力较高且均匀的加固体,并可降低地基的不均匀沉降。同时采用树根桩加以分担部分上部荷载,以提高地基承载力、控制沉降及涵身继续倾斜。并介绍了该复合地基的方案设计和施工。实践证明,适当运用复合地基进行地基处理能取得良好的加固效果,且经济合理。

Application of Composite Foundation in Reinforcement Treatment for a Highway Existing Culvert

The foundation reinforcement method is discussed based on an actual engineering example. The paper analyzes the cause of the fissures happened on a highway existing culvert. The combined reinforcement method with root piles,composite foundation and static pressure grouting is adopted for the area that settles obviously. The method of design and construction about the composite foundation is introduced. The practice proves that good reinforcement effect can be obtained when applying appropriate composite fou...