EPS材料减荷效应及工程应用评述  

Reviews of Load-Reduction Mechanism and Engineering Application of EPS Materials

作　　者：刘宇翼[1,2] 从卫民[3] 苏运河[1] 佘跃心[1] 杨琴[1] 潘鑫 汤奇 LIU Yuyi CONG Weimin SU Yunhe SHE Yuexin YANGQin PAN Xin TANGQi(Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology, Huaian 223001, China State Key Laboratory for Geomeehenies and Deep Underground Engineering, China University of Mining ＆ Technology, Xuzhou 221008, China Department of Construction Plan Examination of Huaian, Huaian 223001, China)

机构地区：[1]淮阴工学院建筑工程学院,江苏淮安223001 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [3]淮安市建设工程施工图审查处,江苏淮安223001

出　　处：《中国材料进展》2017年第9期681-687,共7页Materials China

基　　金：住房与城乡建设部科技项目(2014-K3-030);江苏省政策引导类计划(产学研合作)项目(BY2016061-12);江苏省建设系统科技项目(2015ZD01)

摘　　要：EPS是由苯乙烯在分散剂作用下悬浮于水中,经引发剂引发聚合,再加液体发泡剂浸渍而成的泡沫材料。EPS泡沫具有轻质、压缩性高、稳定性好、耐久性长、吸湿性低、隔热保温效果好等优点,是一种理想的降低土压力缓冲材料,在矿业、公路、建筑等工程中已得到实践验证,在广泛收集、认真查阅前人研究成果的基础上,总结了EPS材料的密度、耐久性、热稳定性、热传导性等物理力学特性,重点阐述了矿井井筒、填土涵洞、挡土结构三种不同类型结构中使用EPS作为减荷材料的应用效果,并从能量学、土拱效应、土压力理论等角度诠释了EPS材料的减荷机理。针对矿井井筒中的EPS减荷材料,提出高应力状态下EPS材料的变形特性、复杂环境中EPS材料的热力性能、岩土-EPS-井壁相互作用以及EPS材料减荷效应的试验验证是今后研究的主要发展方向。Expanded Polystyrene （EPS） is a kind of foam material which is made from styrene that suspended in water under the action of a dispersing agent, then polymerized by initiator and impregnated with liquid foaming agent. Tested in mining, roads, building and other projects, EPS is regarded as an ideal buffer material to reduce soil pressure due to its advantages like light weight, high compressibility, good stability, long durability, low moisture absorption, good heat insulation and preservation performance, etc. Based on the predecessors＇ research, the density, durability, thermal stability, thermal conductivity as well as other physical and mechanical properties of EPS materials are summarized, and the load-reducing effects are analyzed emphatically when EPS materials are applied in the mine shaft wall, culvert under stacked soil and retaining structure. The load-reducing, mechanism of EPS material has been illustrated according to energetics,soil arching effect and earth pressure theory. Finally, it puts forward that the studies on mechanical behaviors of EPS under high stresses, thermal performance of EPS in a complex environment, the rock （soil）-EPS-wall interaction and test verification of load-reducing effect of EPS materials are the main directions of further research.

关 键 词：EPS材料 减荷效应 减荷机理 矿井井筒 填土涵洞 挡土结构 

分 类 号：U449[建筑科学—桥梁与隧道工程]