橡胶颗粒混合土加筋路堤稳定性研究

doi:10.12141/j.issn.1000-565X.240291

摘要/Abstract

摘要：

为了减少废旧橡胶轮胎带来的环境污染，将其加工成衍生集料应用于工程加固已成为一种有效的解决措施。当前，土工格栅加筋技术在路堤、边坡工程中应用广泛，但受土资源限制，大多采用当地的细集料进行回填夯实，导致土工格栅无法充分发挥加筋效果。因此，提出废旧轮胎橡胶颗粒与土工格栅复合加筋路堤的方法解决以上问题。通过三轴剪切试验，研究了橡胶颗粒含量（质量分数）（0%（纯砂）、5%、10%、15%和20%）对混合土剪切特性的影响，并开展土工格栅拉拔试验，分析了橡胶颗粒含量对单向、双向和三向土工格栅拉拔特性的影响及其机理，进而通过室内试验和数值模拟方法，分析了橡胶颗粒混合土加筋路堤的稳定性。结果表明：当橡胶颗粒含量增加时，混合土的弹性模量呈现逐渐降低的趋势，同时，抗剪强度指标呈现先增后减的趋势，在含量15%时达到最大值；3种土工格栅在混合土中的峰值拉拔力随着橡胶含量的增加也呈现先增后减的趋势，在含量为15%时达到最大值；在双向和三向土工格栅加筋路堤中分别掺加含量为15%的橡胶颗粒可以减小路堤约19%和23%的沉降量，以及约18%和23%的土压力；复合加筋层的存在明显限制了路堤边坡破坏滑裂面的发展深度，提高了路堤抵抗变形的能力。

关键词: 废旧轮胎橡胶颗粒, 混合土, 加筋路堤, 剪切特性, 拉拔特性, 变形特性

Abstract:

To reduce the environmental pollution caused by waste rubber tires, it is an effective solution to process them into derived aggregates and apply them in engineering reinforcement. Currently, geogrid reinforcement technology is widely used in embankment and slope projects. However, due to the limitation of soil resources, most of the local fine aggregates are used for backfill and compaction, which leads to the geogrid not being able to give full play to the reinforcing effect. Therefore, this paper proposed the method of composite reinforced embankment of waste tire rubber particles and geogrid to solve the above problems. The influence of rubber particle content (0%, 5%, 10%, 15%, and 20%) on the shear characteristics of the mixed soil was examined using a triaxial shear testing system. Additionally, pullout tests on geogrids were conducted to investigate the effects and mechanisms of rubber particle content on the pullout characteristics of uniaxial, biaxial, and triaxial geogrids. Finally, the deformation characteristics and stability of reinforced soil embankment with rubber granular soil mixture were analyzed by indoor tests and numerical simulation methods. The results indicate that the elastic modulus of the mixed soil gradually decreases as the rubber particle content increases. At the same time, the shear strength index shows an initial increase followed by a decrease, reaching its maximum value at a content of 15%. The peak tensile force of the three types of geogrids in the mixed soil follows the same trend with its maximum value at a content of 15%. The addition of 15% rubber particles in bi-axial and tri-axial geogrid-reinforced embankments reduces the settlement of the embankment by approximately 19% and 23%, respectively, as well as the lateral earth pressure by approximately 18% and 23%. The presence of the composite reinforcement layer significantly limits the development depth of the slope failure slip surface, thus enhances the embankment’s resistance to deformation.

Key words: waste tire rubber particle, mixed soil, reinforced embankment, shear characteristic, pull-out characteristic, deformation characteristic

中图分类号:

TU411

李涛, 李越, 舒佳军, 张瑞海, 刘波. 橡胶颗粒混合土加筋路堤稳定性研究[J]. 华南理工大学学报(自然科学版), 2025, 53(2): 124-135.

LI Tao, LI Yue, SHU Jiajun, ZHANG Ruihai, LIU Bo. Stability Study of Reinforced Embankment with Rubber Particles Mixed Soil[J]. Journal of South China University of Technology(Natural Science Edition), 2025, 53(2): 124-135.

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参考文献 35

1	刘丽莎，田锋．废旧轮胎的回收处理及资源化现状研究［J］．新型工业化，2021，11（5）：58-59.
	LIU Lisha， TIAN Feng ．Research on recycling and resource utilization of waste tires［J］．The Journal of New Industrialization，2021，11（5）：58-59.
2	LI B， HUANG M S， ZENG X W ．Dynamic behavior and liquefaction analysis of recycled-rubber sand mixtures［J］．Journal of Materials in Civil Engineering，2016，28（11）：1-14.
3	LI L H， LIU S S， XIAO H L，et al ．Experimental investigation on reinforcement effect of sustainable materials for different subgrades［J］．Journal of Cleaner Production，2022，343（7）：130944/1-14.
4	LI L H， YANG J C， XIAO H L，et al ．Behavior of tire-geogrid-reinforced retaining wall system under dynamic vehicle load［J］．International Journal of Geomechanics，2020，20（4）：04020017/1-12.
5	LI H B， LI W B， TEMITOPE A A，et al ．Analysis of the influence of production method，crumb rubber content and stabilizer on the performance of asphalt rubber［J］．Applied Sciences，2020，10（16）：5447/1-18.
6	WANG H N， YOU Z P， MILLS-BEALE J，et al ．Laboratory evaluation on high temperature viscosity and low temperature stiffness of asphalt binder with high percent scrap tire rubber［J］．Construction and Building Materials，2012，26（1）：583-590.
7	WANG T， XIAO F P， AMIRKHANIAN S，et al ．A review on low temperature performances of rubberized asphalt materials［J］．Construction and Building Materials，2017，145（4）：483-505.
8	KOK B V， COLAK H ．Laboratory comparison of the crumb-rubber and SBS modified bitumen and hot mix asphalt［J］．Construction and Building Materials，2011，25（8）：3204-3212.
9	GHAVIBAZOO A， ABDELRAHMAN M ．Composition analysis of crumb rubber during interaction with asphalt and effect on properties of binder［J］．International Journal of Pavement Engineering，2013，14（5）：517-530.
10	JEONG K D， LEE S J， AMIRKHANIAN S N，et al ．Interaction effects of crumb rubber modified asphalt binders［J］．Construction and Building Materials，2010，24（5）：824-831.
11	ZHOU C X， TAN Y Q ．Study on anti-icing performance of pavement containing a granular crumb rubber asphalt mixture［J］．Road Materials and Pavement Design，2009，10（1）：281-294.
12	BRESSI S， COLINAS-ARMIJO N， DI MINO G ．Analytical approach for the mix design optimisation of bituminous mixtures with crumb rubber［J］．Materials and Structures，2018，51（1）：48-59.
13	CHEN H L， LI D D， MA X，et al ．Mesoscale analysis of rubber particle effect on young’s modulus and creep behaviour of crumb rubber concrete［J］．International Journal of Mechanics and Materials in Design，2021，17（3）：659-678.
14	刘志恒，陈徐东，胡良鹏，等．重复冲击下高温后橡胶自密实混凝土动态力学性能［J］．工程科学与技术，2023，55（4）：169-178.
	LIU Zhiheng， CHEN Xudong， HU Liangpeng，et al ．Investigation on the dynamic mechanical properties of thermally treated rubberized self-compacting concrete under repeated impact［J］．Advanced Engineering Sciences，2023，55（4）：169-178.
15	ZHU X B， MIAO C W， LIU J P，et al ．Influence of crumb rubber on frost resistance of concrete and effect mechanism［J］．Procedia Engineering，2012，27（1）：206-213.
16	REN R， LIANG J F， LIU D W，et al ．Mechanical behavior of crumb rubber concrete under axial compre-ssion［J］．Advances in Concrete Construction，2020，9（3）： 249-256.
17	ASSAGGAF R A， ALI M R， AL-DULAIJAN S U，et al ．Properties of concrete with untreated and treated crumb rubber-a review［J］．Journal of Materials Research and Technology-Jmr & T，2021，11（1）：1753-1798.
18	AL-TAYEB M M， BAKAR B H ABU， ISMAIL H，et al ．Impact resistance of concrete with partial replacements of sand and cement by waste rubber［J］．Polymer-Plastics Technology and Engineering，2012，51（12）：1230-1236.
19	XU X Q， ZHANG Z G， HU Y G ．Bearing strength of crumb rubber concrete under partial area loading［J］．Materials，2020，13（11）：2446/1-26.
20	AKBARI M， TAHAMTAN M H N， FALLAH-VALUKOLAEE S，et al ．Investigating fracture characteristics and ductility of lightweight concrete containing crumb rubber by means of WFM and SEM methods［J］．Theoretical and Applied Fracture Mechanics，2022，117（1）：103148/1-15.
21	RICHARDSON A， COVENTRY K， EDMONDSON V，et al ．Crumb rubber used in concrete to provide freeze-thaw protection （optimal particle size）［J］．Journal of Cleaner Production，2016，112（1）：599-606.
22	OTIENO M， MUSHUNJE K ．Creep deformation characteristics of rubberised structural concrete［J］．Construction and Building Materials，2021，312（6）：125418/1-10.
23	顾建波，周恩全，姚缘．橡胶混合土路用性能研究［J］．交通科技与管理，2024，5（4）：111-113.
	GU Fangbo， ZHOU Enquan， YAO Yuan ．Study on performance of rubber mixed earth road［J］．Traffic Technology and Management，2024，5（4）：111-113.
24	YADAV J S， TIWARI S K. Influence of crumb rubber on the geotechnical properties of clayey soil［J］．Environment Development and Sustainability，2018，20（6）：2565-2586.
25	刘路路，蔡国军，刘晓燕．橡胶-砂轻质填料压缩特性及颗粒破碎研究［J］．中国矿业大学学报，2020，49（5）：882-888.
	LIU Lulu， CAI Guojun， LIU Xiaoyan ．Investigation on compression and particle breakage characteristics of rubber-sand lightweight filler［J］．Journal of China University of Mining & Technology，2020，49（5）：882-888.
26	刘飞禹，李昊泽，符军，等．橡胶砂级配对混合土体剪切特性影响研究［J］．岩土力学，2023，44（3）：663-672.
	LIU Feiyu， LI Haoze， FU Jun，et al ．Effect of rubber-sand mixtures gradation on shear characteristics of mixed soil［J］．Rock and Soil Mechanics，2023，44（3）： 663-672.
27	DAS S， BHOWMIK D ．Small-strain dynamic beha-vior of sand and sand-crumb rubber mixture for different sizes of crumb rubber particle［J］．Journal of Materials in Civil Engineering，2020，32（11）：04020334/1-9.
28	李丽华，肖衡林，唐辉明，等.轮胎碎片-砂混合土抗剪性能优化试验研究［J］．岩土力学，2013，34（4）：1063-1067.
	LI Lihua， XIAO Henglin， TANG Huiming，et al ．Shear performance optimizing of tire shred-sand mixture［J］．Rock and Soil Mechanics，2013，34（4）：1063-1067.
29	周海．砂土-橡胶颗粒轻质混合料强度与剪胀特性试验研究［D］．重庆：重庆大学，2021.
30	蔡永明，王志杰，齐逸飞，等．土工格栅加筋橡胶碎石动力特性试验研究［J］．岩土力学，2024，45（1）：87-96，107.
	CAI Yongming， WANG Zhijie， QI Yifei，et al ．Experimental study on dynamic properties of geogrid reinforced rubber gravel［J］．Rock and Soil Mechanics，2024，45（1）：87-96，107.
31	SOL-SANCHEZ M， MORENO-NAVARRO F， PEREZ R，et al ．Defining the process of including sustainable rubber particles under sleepers to improve track beha-viour and performance［J］．Journal of Cleaner Production，2019，227（15）：178-188.
32	刘方成，王将，吴孟桃，等．土工格栅加筋橡胶砂应力-应变特性试验［J］．吉林大学学报（工学版），2023，53（9）：2542-2553.
	LIU Fangcheng， WANG Jiang， WU Mengtao，et al ．Stress-strain characteristics of geogrid reinforced［J］．Journal of Jilin University （Engineering and Technology Edition），2023，53（9）：2542-2553.
33	公路土工试验规程：［S］．
34	杨晋华．季节性冻土区粉砂土的力学特性研究［D］．包头：内蒙古科技大学，2019.
35	BERGADO D T， CHAI J C， MIURA N. Prediction of pullout resistance and pullout force-displacement relationship for inextensible grid reinforcements［J］．Soils and Foundations，1996，36（4）：11-22.

试验材料	比重G_s	不均匀系数C_u	曲率系数C_c	粒径范围/mm	平均粒径d₅₀/mm
砂土	2.69	1.92	0.69	0.001~2.000	0.095
橡胶颗粒	1.18	1.65	0.90	2.50~4.75	3.71

橡胶颗粒含量/%	最大干密度ρ_max/（g·cm^-3）	最小干密度ρ_min/（g·cm^-3）
0	1.88	1.34
5	1.76	1.25
10	1.65	1.17
15	1.57	1.12
20	1.44	1.04

参数	数值
参数	双向土工格栅	三向土工格栅
网孔形状	方形	三角形
单位面积质量/（g·cm^-2）	186	235
厚度/mm	4	6
网孔边长/mm	45	30
纵向拉伸强度/（kN·m^-1）	35	45
横向拉伸强度/（kN·m^-1）	35	45
纵向标称拉伸率/%	9.6	11.8
横向标称拉伸率/%	7.5	10.6