微型钢管注浆桩在狭窄空间漂石地层中的应用

Application of Micro Steel Tube Grouting Pile in the Narrow Space of Boulder Formation

随着城市建设的发展,土地利用率在不断的提高,施工单位面临在狭窄的场地内进行基坑开挖和支护的问题越来越多。对于场地狭窄、地质及周边环境复杂的基坑支护工程,采用传统的支护方式往往难以实施或难以达到预期的安全效果和经济效益。本文结合北京市S1线车辆段车场线密集高架桥梁周边综合管沟基坑支护工程,介绍了微型钢管注浆桩基坑支护体系在狭窄空间漂石地层的应用,本基坑支护体系具有适用性强、承载力高、施工快捷、经济效益明显等显著优点,具有广阔的经济技术前景。

With the development of city construction,the land use efficiency is increasing,and the construction units are facing more and more problems in excavation and support of foundation pit in narrow space.Foundation pit supporting engineering for narrow space,geology and surrounding environment,the traditional support methods are often difficult to implement or difficult to achieve the desired safety and economic benefits.This paper combines Beijing vehicle S1 line intensive tunnel project of foundation pit surrounding elevated bridge,introduces the micro steel tube grouting pile foundation pit support system applied in the narrow space of boulder formation,the base pit supporting system with significant advantages of strong adaptability,high bearing capacity,convenient construction,obvious economic benefit,and has a broad economic and technological prospects.