跨海隧道端头软土地基处理方案优化研究  

Study on Optimization of Soft Soil Foundation Treatment Scheme at the End of Cross-sea Tunnel

作　　者：罗磊 周瑞平 刘春讯 沈俊 于海洋 LUO Lei;ZHOU Ruiping;LIU Chunxun;SHEN Jun;YU Haiyang(Zhuhai Shizimen Central Business District Development Holdings Co.,Ltd.,Zhuhai 519000,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]珠海十字门中央商务区建设控股有限公司,广东珠海519000 [2]深圳大学土木与交通工程学院,深圳518060

出　　处：《广东土木与建筑》2023年第3期47-50,共4页Guangdong Architecture Civil Engineering

摘　　要：由于地质条件的限制,当软弱地基不经过处理或者未处理完全时候会给后续工程施工带来严重的安全隐患。文章依托珠海某跨海隧道工程,着重分析了跨海隧道端头典型软土地基施工时地基加固的处理方案比选和优化。分析其中的主要问题,包含软土地基中块石和CFG桩的处理方案。经研究发现:先期堆载预压措施对路基软土的处理受周边环境影响较大,周边土方变动致使路基发生沉降,而选择水泥搅拌桩复合地基的方式来处理软弱地基是合适的,但当地层中存在大块砾石时可行性不高。通过加固效果和经济效益两个方面对方案进行对比并且给出建议,以期为同类型工程保证基础设施工程质量和运营安全作参考。Due to the limitation of geological conditions,when the weak foundation is not treated or not completely treated,it will bring serious safety hazards to the subsequent construction.Relying on a sea-crossing tunnel project in Zhuhai,this paper focuses on analyzing the comparison,selection and optimization of the foundation reinforcement during the construction of typical soft soil foundations at the end of the sea-crossing tunnel.Analyze the main problems,including the treatment plan of boulders and CFG piles in soft soil foundations.The study found that the treatment of the soft soil of the subgrade by the pre-loading and preloading measures is greatly affected by the surrounding environment,and the change of the surrounding earthwork causes the subgrade to settle.The feasibility is not high when there are large gravels in the layer.Compares the schemes and gives suggestions from the aspects of reinforcement effect and economic benefit,in order to ensure the quality and operation safety of infrastructure projects for similar projects.

关 键 词：跨海隧道 软土地基 水泥搅拌桩 CFG桩 方案优化 

分 类 号：TU473.1[建筑科学—结构工程]