复杂环境及富水地质条件下深大基坑支护方案研究  

Research on Support Scheme of Deep and Large Foundation Pits Under Complex Environment and Water-Rich Geological Conditions

作　　者：孙国著 SUN Guozhu(China Railway Construction Kunlun Investment Group Co.Ltd.,Chengdu Sichuan 610040,China)

机构地区：[1]中国铁建昆仑投资集团有限公司,四川成都610040

出　　处：《铁道建筑技术》2025年第2期193-196,208,共5页Railway Construction Technology

摘　　要：富水地区地下水对基坑工程开挖施工带来一系列岩土工程问题,影响基坑稳定性及工程投资的经济性,需对地下水危害进行防治。结合某综合客运枢纽(北广场)工程深基坑设计,对复杂环境及富水地质条件下深大基坑支护体系进行研究,经方案综合比选,针对性提出钻孔咬合灌注桩+锚索复合支护体系方案。实践结果表明,采用咬合灌注桩+锚索复合支护方案在富水地区具有显著优势,支护变形小、止水效果优良,相较于加内支撑方案可有效提高施工的便利性、安全性和经济性。The groundwater in the water-rich area brings a series of geotechnical engineering problems to the excavation and construction of foundation pits,affecting the stability of foundation pits and the economic feasibility of engineering investment.It is necessary to prevent and control the hazards of groundwater.Based on the design of a deep foundation pit of a comprehensive passenger transportation hub(North Square)project,a study was conducted on the support system of a deep foundation pit under complex environmental and water-rich geological conditions.After comprehensive comparison and selection of schemes,a targeted drilling bite grouting pile+anchor cable composite support system scheme was proposed.The practical results show that the composite support scheme of interlocking cast-in-place piles and anchor cables has significant advantages in water-rich areas,with small support deformation and excellent waterproofing effect.Compared with the internal support scheme,it can effectively improve the convenience,safety,and economy of construction.

关 键 词：不良地质 深基坑工程 复合支护体系 钻孔咬合灌注桩 锚索 

分 类 号：TU473.2[建筑科学—结构工程]