管-土相互作用的试验研究  

Experimental Research on Soil-pipe Dynamic Interaction

作　　者：陈春光[1] 杨庆华[1] 孔杰[1] 刘志文[1] 侯翠婷[1] 

机构地区：[1]西南交通大学 土木工程学院,成都610031

出　　处：《特种结构》2012年第2期91-94,共4页Special Structures

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07424-004)

摘　　要：根据埋地供水管道与地基土的相互关系,设计了简易的管-土动力学试验装置,测定了不同轴向震动加速度下管-土抗力和管-土相对位移值,试验结果表明:最大管土抗力、管土滑动临界位移、土弹簧系数等都与震动加速度、管道埋深和管材有关;单位接触面积管-土最大抗力,铸铁管在5～25N/cm^2,PE管在2.1～6.9N/cm^2;土体弹性极限位移很小,约在0.1～0.4mm之间;等效土弹簧系数,铸铁管:4～8N/mm/mm,PE管:0.3～1.0N/mm/mm。According to the relationship between the water-supply buried pipel#~e and the foundation soil, the simple soil-pipe dynamic experimental devices were designed. The soil resistance to pipe and the soil-pipe relative displace- ment were determinated under the different axial vibration accelerations. The experiment results showed that the maxi- mum soil resistance to pipe, the soil-pipe sliding critical displacement and the soil spring constant etc. depend on the vi- bration acceleration, depth of pipe and pipe materials. The experiments also showed that the maximum soil resistance to pipe on unit contacting area of cast-iron pipe is between 5 N/cm2 to 25 N/cm2, and which of PE-pipe is between 2.1N/cm2 to 6.9 N/ cm2 ; the soil elastic limit displacement is very small and only about 0. 1 mm to 0.4mm; the equivalent soil spring constant of cast-iron pipe is between 4 N / mm / mm to 8 N / mm / mm , and which of PE-pipe is be- tween 0.3N/mm/mm to 1.ON/mm/mm.

关 键 词：埋地管道 管-土动力相互作用 管-土抗力 相对位移 土弹簧系数 

分 类 号：U171[交通运输工程]