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橡膠顆粒改良紅黏土路基性能研究

Study on the Performance of Red Clay Subgrade Improved by Waste Tire Particles

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陶云峰

（山西交控太舊高速公路改擴(kuò)建項(xiàng)目有限公司，太原 030006)

摘要：為研究橡膠顆粒在改良路基紅黏土中的應(yīng)用性能，開展了不同橡膠顆粒粒徑和摻量條件下的改良路基紅黏土擊實(shí)特性、抗剪強(qiáng)度、壓縮系數(shù)以及滲透系數(shù)試驗(yàn)。結(jié)果表明：摻入 4 種不同粒徑橡膠顆粒后，隨著橡膠粉摻量增大，最優(yōu)含水率呈現(xiàn)出先增大后減小的變化趨勢，抗剪強(qiáng)度整體呈現(xiàn)出先增大后減小的變化趨勢；隨著橡膠粉顆粒粒徑增大，抗剪強(qiáng)度整體先減小后增大；各組橡膠顆粒改良紅黏土均屬于中壓縮性土，且土的壓縮性隨材料摻量增大而增大，滲透性能整體也呈現(xiàn)出逐漸增大的趨勢；此外，隨著橡膠顆粒粒徑的逐漸增大，改良紅黏土的壓縮系數(shù)和滲透系數(shù)均逐漸減小。研究成果為我國路基紅黏土的改良和資源的回收提供了借鑒作用。

關(guān)鍵詞：橡膠顆粒；粒徑；摻量；路基紅黏土；滲透性

中圖分類號：TU045

文獻(xiàn)標(biāo)志碼：A

文章編號： 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

作者簡介：陶云峰 (1975—) , 男，本科，工程師。研究方向：公路工程施工管理。

收稿日期：2023 - 03 - 28