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以某乌江悬索桥为例,从设计参数、典型地质剖面、设计方案及方案比选等方面详细研究了重力锚基坑开挖支护设计;介绍了花管注浆加固的原理并将其作为一种设计方案应用到基坑侧壁的加固,并进行优化设计和稳定性验算;提出了山区桥梁锚碇基坑的设计流程,为基坑设计提供一种科学可行的设计思路,对同类基坑的支护优化设计具有借鉴意义。
Taking a Wujiang Suspension Bridge as an example, the design of excavation and support for gravity anchor excavation is studied in detail from the design parameters, typical geological sections, design schemes and comparison of schemes. The principle of pipe grouting reinforcement is introduced and used as a The design scheme is applied to the reinforcement of the sidewall of the foundation pit, and the optimal design and stability checking are carried out. The design flow of the anchorage foundation pit in mountainous bridge is proposed, which provides a scientific and feasible design idea for foundation pit design. The optimal design of support has reference value.