上覆压力及排水条件对吹填软土强度影响  

Effects of overburden pressure and drainage conditions on strength of soft dredger fills

作　　者：杨爱武[1,2,3] 闫澍旺[2] 杜东菊[1,3] 赵瑞斌[1,3] 卢力强[1,3] 王江宏[1,3] 

机构地区：[1]天津城市建设学院土木工程系,天津300384 [2]天津大学建筑工程学院,天津300072 [3]天津市软土工程特性与工程环境熏点实验室,天津300072

出　　处：《岩土力学》2011年第1期172-178,共7页Rock and Soil Mechanics

基　　金：天津市科技发展计划项目(No.04311381);天津市科技发展计划重点科技攻关项目(No.06YFSZSF04000);科技创新能力与环境建设平台项目(No.06SYSYJC14900);天津市科技创新专项基金项目(No.07FDZDSF02101-04)

摘　　要：吹填土由于其成分来源及沉积环境不同,性质千差万别。以天津海积软土为土质材料,模拟现场吹填环境,研究了吹填软土强度形成影响因素。试验表明,不同的压力及排水条件对吹填软土强度增长影响较大。当排水条件有利于土体中的水排出时,强度增长明显。上覆压力对土体强度增长的影响通过一定的排水条件得以实现,排水条件差和压力增大时,强度增长缓慢且很小,反之,强度增长快且绝对值大。Because of different compositions and depositional environments, the natures of dredger fills are different. In this paper, Tianjin marine soft soil is used as material to simulate site environment to study the strength growth in soft dredger fill. Experiments show that the different conditions of pressure and drainage affect the growth of soft dredger fill greatly. When conditions are conducive to the drainage of water in soil, the growth of strength is significant. The effect on soil strength growth by overburden pressure is through some possible drainage; when drainage conditions are bad, and the pressure increased, the strength grows slowly and little; on the contrary, it grows faster and absolute value is large.

关 键 词：吹填软土 屈服应力 排水条件 上覆压力 现场模拟 

分 类 号：TU447[建筑科学—岩土工程]