深厚海相淤泥地区浅基坑支护形式比选和控制措施  

Comparison and Optimization of Shallow Foundation Excavation Supports in Thick Marine Soft Soils

作　　者：高战祥 许燕青 向帅 何鹏飞 GAO Zhanxiang;XU Yanqing;XIANG Shuai;HE Pengfei(China Construction Science and Industry Co.Ltd.,Shenzhen 518000;Shenzhen Geotechnical Investigation&Surveying Institute(Group)Co.Ltd.,Shenzhen 518027)

机构地区：[1]中建科工集团有限公司,广东深圳518000 [2]深圳市勘察测绘院(集团)有限公司,广东深圳518027

出　　处：《土工基础》2022年第6期911-916,共6页Soil Engineering and Foundation

摘　　要：基坑支护方案直接影响基坑安全、施工工期、质量和造价,选择合理基坑支护方案是保证基坑工程顺利实施的前提,基坑方案必须保证安全可靠、造价合理、施工便利。珠三角地区深厚海相淤泥属欠固结淤泥,含水率高、压缩性高、强度低、有机质含量高,基坑支护难度大。需采取坑底淤泥加固、搅拌桩水泥特殊配方、坑中坑加固等关键措施保证基坑安全。分析了浅基坑常见支护形式:放坡、土钉墙、钢板桩、SMW工法桩、重力式水泥土挡墙等,这些支护无支撑遮挡,工期短,造价低,可以充分发挥土层的自承能力,变形控制是支护成功的关键。The thick marine mucky soil in the Pearl River Delta region is an unconsolidated mucky soil with high moisture content,high compressibility,low shear strength and high organic content,so it is difficult to provide a safe support for the foundation excavations.This paper analyzes the common supporting types of the shallow foundation excavation,namely,sloped open cut,soil nailing wall,steel sheet pile,soil-mixing wall,gravity cement soil retaining wall,etc.These supports have advantages of no internal support,short construction duration,low project cost,and can maximize the self-supporting ability of soil layers.Deformation control is critical to the success of the support.

关 键 词：深厚海相淤泥 浅基坑 支护选型 控制措施 

分 类 号：TU473[建筑科学—结构工程]