冻土路基硬质聚氨酯泡沫板抗压性能研究-《高速铁路技术》

文章信息/Info

Title:: Research on Compressive Property of Rigid Polyurethane Foam Board for Frozen Soil Subgrade

作者:: 薛元; 冷景岩; 袁海顺; 肖朝乾; 祝丽娟; 1. 中铁二院工程集团有限责任公司, 成都 610031;
2. 中国铁路设计集团有限公司, 天津 300142;
3. 红宝丽集团股份有限公司, 南京 211300

Author(s):: XUE Yuan; LENG Jingyan; YUAN Haishun; XIAO Chaoqian; ZHU Lijuan; 1. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China;
2. China Railway Design Corporation, Tianjin 300142, China;
3. Hongbaoli Group Co., Ltd., Nanjing 211300, China

Keywords:: frozen soil subgrade|rigid polyurethane foam board|compressive property

摘要:: 本文从聚氨酯板材的力学性能角度出发，通过模拟实验和理论分析等方法考察了冻土路基采用的硬质聚氨酯泡沫板的抗压性能，分析了模拟施工阶段样品在连续施压状态下的变形量和模拟工后运营阶段样品的动载荷疲劳变形量及变形量与材料压缩应力-应变曲线之间的关系。结果表明：在模拟施工阶段，材料施压卸载后的累计变形量≤ 6.3%，在模拟工后运营阶段，加载100万次后，材料的累积形变≤ 3.0%，具有较好的抗压性能。

Abstract:: Based on the mechanical property of polyurethane board, the compressive property of rigid polyurethane foam board for frozen soil subgrade is studied and three sets of data are analyzed by means of simulation experiments and theoretical analyses. One is the deformation of samples under continuous pressure in simulated construction stage; the second is the dynamic load fatigue deformation of samples in simulated post-construction operation stage; the third is a relationship between deformation of samples in simulated post-construction operation stage and compressive stress-strain curve of the material. The results show that:in the simulated construction stage, the accumulated deformation after unloading pressure is ≤ 6.3%; in the simulated post-construction operation stage, the accumulated deformation of the material after loading 1 million times is ≤ 3.0%, so that the material has good compressive property.