走马湖水系综合治理工程软基处理方法及效果分析  

Ground Improvement Method Applied in the Integrated Zouma Lake Watershed Treatment Project

作　　者：原杰斌 郭鹏杰[2] 张述涛 付晖[2] YUAN Jiebin;GUO Pengjie;ZHANG Shutao;FU Hui(CAAC Central&Southern Airport Design&Research Institute Co.Ltd.,Guangzhou 510405;Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010)

机构地区：[1]民航中南机场设计研究院(广州)有限公司,广州510405 [2]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《土工基础》2022年第4期533-536,共4页Soil Engineering and Foundation

摘　　要：走马湖水系综合治理工程是鄂州花湖机场建设的先导性工程,主要工作内容是湖区范围内的软土地基处理和土石方填筑。湖区存在大量软土,平均厚度7~8 m左右,最大厚度约15 m。机场工程对飞行区的工后沉降和工后差异沉降要求严格,综合考虑经济和质量要求,采用排水固结+超载预压方案进行软土地基处理。在超载比1.35~1.45的状态下,超载时间6~10个月,固结度超过90%,沉降速率均小于0.3 mm·d,整个地基处理历时33个月,圆满完成工程建设内容,软土地基处理设计方案可为其它类似工程提供参考。The integrated Zouma lake watershed treatment project is a pilot project of Ezhou Huahu airport project. The major work in this project is the ground improvement of soft cohesive soils and earthwork in the lake area. Large area of soft soils with an average thickness of about 7 to 8 meters and a maximum thickness up to 15 meters are deposited in the lake area. The post construction total settlement and differential settlement requirement criteria for the airport runway area are very strictive. Considering the construction cost and design requirements, the prefabricated vertical drains plus surcharging method was adopted as the ground improvement method. With the surcharge ratio between 1.35 and 1.45, the duration of surcharging was between six and ten months for achieving a degree of consolidation of 90% and a final rate of settlement less than 0.33 mm/day. The entire ground improvement duration was 33 months.

关 键 词：软土 地基处理 排水固结 超载预压 

分 类 号：TU472[建筑科学—结构工程]