PDF全文阅读

陶云峰

 

（山西交控太旧高速公路改扩建项目有限公司 ，太原 030006)

摘   要：为研究橡胶颗粒在改良路基红黏土中的应用性能，开展了不同橡胶颗粒粒径和掺量条件下的改良路基红黏土击实特性、抗剪强度、压缩系数以及渗透系数试验。结果表明：掺入 4 种不同粒径橡胶颗粒后， 随着橡胶粉掺量增大，最优含水率呈现出先增大后减小的变化趋势，抗剪强度整体呈现出先增大后减小的变化趋势；随着橡胶粉颗粒粒径增大，抗剪强度整体先减小后增大；各组橡胶颗粒改良红黏土均属于中压缩性土，且土的压缩性随材料掺量增大而增大，渗透性能整体也呈现出逐渐增大的趋势 ；此外， 随着橡胶颗粒粒径的逐渐增大，改良红黏土的压缩系数和渗透系数均逐渐减小。研究成果为我国路基红黏土的改良和资源的回收提供了借鉴作用。

关键词：橡胶颗粒 ；粒径 ；掺量 ；路基红黏土 ；渗透性

中图分类号：TU045            

文献标志码：A           

文章编号： 1005- 8249   (2025)  01- 0129- 04 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .01 .024

 

TAO Yunfeng

(Shanxi Jiaokong Taijiu Expressway Reconstruction and Expansion Project Co. ，Ltd. ，Taiyuan 030006 ,  China) 

Abstract: To study the application performance of waste tire rubber particles in improved subgrade red clay, this study conducted laboratory tests on the compaction characteristics, shear strength, compression coefficient, and permeability coefficient of improved subgrade red clay under different rubber particle sizes and admixtures. The results show that: (1) the optimal moisture content of red clay in the roadbed without mixing waste tire rubber particles is 26.9%; When four different particle sizes of waste tire rubber particles are added to the red clay of the roadbed, the optimal water content of the improved red clay firstly increases and then decreases, with the increase in the content of rubber powder; (2) With the increase of rubber powder content, the overall shear strength of improved red clay firstly increases and then decreases; As the particle size of rubber powder increases, the overall shear strength of improved red clay decreases first and then increases; (3) The control group and each group of rubber particle modified red clay belong to medium compressibility soil, and the compressibility of the soil increases with the increase of material content, and the overall permeability also presents a trend of gradually increasing; In addition, with the gradual increase of rubber particle size, the compression coefficient and permeability coefficient of improved red clay gradually decrease. The research results provide a reference for the improvement of roadbed red clay and the recycling of waste tires in China.

Key words: waste tires, rubber particles, particle size, dosage, subgrade red clay, permeability

作者简介： 陶云峰  (1975—) ,   男 ，本科 ， 工程师。研究方 向 ：公路工程施工管理。

收稿日期：2023 - 03 - 28