固化技术加固吹填土试验研究  

Application of Solidification Method in the Improvement of Hydraulically Dredged Soils

作　　者：孟瑞军 MENG Ruijun(China Railway Construction Group Co.,Ltd.,Suzhou 215000)

机构地区：[1]中铁建设集团有限公司,江苏苏州215000

出　　处：《土工基础》2020年第4期557-562,共6页Soil Engineering and Foundation

摘　　要：土体固化技术可在软土表面形成人工硬壳层,但是固化剂种类、配比、施工工艺以及加固深度对加固效果及工程造价产生很大影响,石灰等固化剂拌合产生粉尘对周边耕植土产生一定的影响。依托某吹填工程,进行了室内固化剂配比试验及现场试验,结合就地固化处理后检测结果,评价其加固效果。试验结果表明:加固深度范围内土体含水率大幅度降低,其物理力学指标明显改善,并快速形成具有一定承载力与强度的硬壳层及板体,完全满足后续施工机械承载力的需求。An artificial hard crust can be formed at the surface of soft soils by using soil solidification method.However,the type,component,the mixture procedure and the depth of the improvement of using these solidification agents can significantly affect the results and project construction cost.The dust induced by the quick lime also adversely affect the vegetation of adjacent soils.This paper presents a case history of solidification of a hydraulically dredged soft soils.Both the laboratory and situ testing were conducted by using various ratio of solidification agents.The results indicated that,the moisture contents reduce within the depth range of improvement with improved physical and mechanical properties.The hard layer crust with improved bearing capacity and strength could be formed quickly.

关 键 词：新吹填淤泥 十字板强度 锥尖阻力 承载力 

分 类 号：TU472[建筑科学—结构工程]