粤港澳大湾区深厚软土条件下深基坑支护设计与实践  

Design and practice of deep foundation pit support in complex geological conditions of deep soft soil area in Guangdong-Hong Kong-Macao Greater Bay Area

作　　者：魏国灵 梁永国 张细才 林本海[2] Wei Guoling;Liang Yongguo;Zhang Xicai;Lin Benhai(Guangdong Engineering Investigation Institute,Guangzhou,Guangdong,510510,China;School of Civil Engineering,Guangzhou University,Guangzhou,Guangdong,510510,China)

机构地区：[1]广东省工程勘察院,广东广州510510 [2]广州大学土木工程学院,广东广州510006

出　　处：《化工矿产地质》2019年第4期291-298,共8页Geology of Chemical Minerals

摘　　要：在位于粤港澳大湾区的珠海横琴金源国际广场深基坑的设计中,结合场地深厚淤泥的工程地质条件、周边环境条件,以及相关规范,本着安全、经济、可靠的原则,采用长桩与短桩相组合的支护灌注桩+三道钢筋混凝土内支撑的支护形式。长桩主要是控制基坑的稳定性;短桩主要控制基坑的位移,通过对短桩承担的土压力、位移、弯矩、剪力的计算,得出了合适的配筋。基坑工程施工过程中的各项监测数据表明,对深厚淤泥软土场地深基坑支护采用长短桩组合的设计方法具有可行性。In the design of deep foundation pit of Zhuhai-Hengqin-Jinyuan International Square located in Guangdong-Hong Kong-Macao Greater Bay Area,combined with field engineering geologic conditions of deep silt,surrounding environment conditions,and related specifications,based on the principle of security,economic,reliable,combined with long pile and short pile supporting pile+Support form of three reinforced concrete internal supports.Long pile is mainly used to control the stability of foundation pit.The short pile mainly controls the displacement of foundation pit,and the suitable reinforcement is obtained by calculating the earth pressure,displacement,bending moment and shear force borne by the short pile.The monitoring data during the construction of foundation pit engineering show that the design method of long and short pile combination is feasible for deep foundation pit support in deep silt and soft soil.

关 键 词：深基坑 软土 长短桩组合灌注桩基坑支护 稳定性控制 变形控制 

分 类 号：TU473.2[建筑科学—结构工程]