| 摘要: |
| 高聚物注浆材料具有成型快、膨胀性高、抗拉性能好等特点，与碎石桩相结合应用于地基处理中具有明显优势.为了检测高聚物碎石混合料的变形和承载能力，试验研究了轴压荷载作用下高聚物碎石混合料的力学响应，对其应力应变全曲线的特征、高聚物密度和碎石粒径的影响规律进行了分析.结果表明：高聚物碎石混合料具有优越的变形能力；应力应变曲线在达到峰值荷载以前呈现典型的三阶段特征，在达到峰值荷载以后具有应变软化特性；高聚物密度对高聚物碎石混合料的变形和强度影响较大，随着高聚物密度的增加，高聚物碎石混合料脆性增加、强度提高；碎石粒径对高聚物碎石混合料的抗压性能影响较小. |
| 关键词: 高聚物碎石混合料 应力应变全曲线 抗压强度 高聚物密度 碎石粒径 |
| DOI：103969/j.issn.1007 9629201902024 |
| 分类号: |
| 基金项目:国家重点研发计划项目(2017YFC1501204);国家自然科学基金资助项目(51678536，41404096);河南省教育厅高校科技创新人才计划(19HASTIT043);郑州大学优秀青年教师发展基金(1621323001) |
|
| Experimental Study on Uniaxial Compressive Properties of Polymer Gravel Mixtures |
|
WANG Juan, FANG Hongyuan, YU Zisen, CAO Kai, WANG Fuming
|
|
School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
|
| Abstract: |
| The polymer grouting material has the characteristics of fast forming, high expansibility, good tensile performance, etc. Obviously, it has advantages in application to the foundation treatment in combination with gravel piles. The axial compressive tests of polymer gravel mixture material were performed for its deformation and mechanical properties. The characteristics of full stress strain curve and the effect of polymer density and gravel particle size on the mechanical properties of the polymer gravel mixture were analyzed. The results show that the polymer gravel mixture has superior deformability; the stress strain curve exhibits a typical three stage characteristic before reaching the peak load, and has a strain softening characteristic; polymer density has a great influence on the deformation and strength of the polymer gravel mixture. With the increase of polymer density, the brittleness of the polymer gravel mixture is more obvious and the strength is higher. Gravel particle size has little effect on the compressive properties of the polymer gravel mixture. |
| Key words: polymer gravel mixture full stress strain curve compressive strength polymer density gravel particle size |
