拉拔荷载下轮胎格栅–细粒土界面承载特性研究

岳红亚; 房彦宏; 吴建东; 刘亚珍; 王媛; 于洋; 张常勇

doi:10.20265/j.cnki.issn.1007-2993.2024-0289

拉拔荷载下轮胎格栅–细粒土界面承载特性研究

doi: 10.20265/j.cnki.issn.1007-2993.2024-0289

岳红亚^1,,
房彦宏^2, ,,
吴建东¹,
刘亚珍²,
王媛^{1, 3},
于洋⁴,
张常勇¹

1.
山东省交通规划设计院集团有限公司，山东济南　250101
2.
山东大学齐鲁交通学院，山东济南　250002
3.
山东杰瑞交通服务开发有限公司，山东济南　250101
4.
济南大学土木建筑学院，山东济南　250024

基金项目: 山东省自然科学基金（ZR2022QE064）

详细信息

作者简介:
岳红亚，男，1990年生，博士，高级工程师，主要从事大宗固废再生资源化利用等方面的研究。E-mail：yuehongya@126.com

通讯作者:
房彦宏，女，2001年生，在读硕士研究生，主要从事固废再利用的研究。E-mail：202315463@mail.sdu.edu.cn

中图分类号: TU476
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- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2024-06-26
- 修回日期: 2024-09-12
- 录用日期: 2024-10-29
- 刊出日期: 2025-10-10

Interface bearing characteristics of reinforced fine soil of scrap tire grille under drawing load

1.
Shandong Provincial Communications Planning and Design Institute Co., Ltd., Jinan 250101, Shandong, China
2.
School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China
3.
Shandong Jierui Transportation Service Development Co., Ltd., Jinan 250101, Shandong, China
4.
School of Civil Engineering and Architecture, Jinan University, Jinan 250024, Shandong, China

摘要

摘要: 为保证地基结构稳定性，提升土体抗拉强度，通常在地基中放置加筋材料。基于废旧轮胎良好的抗拉伸性与界面粗糙性，提出将废旧轮胎格栅作为地基加筋新材料。通过拉拔试验研究了不同上覆荷载、填料压实度、轮胎条带宽度、网孔尺寸等因素对废旧轮胎格栅加筋细粒土承载性能的影响。结果表明：轮胎条带加筋粉土的承载能力随上覆荷载的增大而提高，细粒土填料越密实轮胎条带峰值拉拔力越大，条带宽度对粉土地基加筋效果影响最明显，条带宽度增加2 cm，峰值拉拔力提高接近50%；轮胎格栅承载力随网孔尺寸的增大而逐渐减弱。研究结果证实废旧轮胎格栅可以有效提高细粒土地基的承载能力，增强土体的抗拉强度，并为进一步的理论研究和技术应用提供了参考。
- 轮胎格栅 /
- 水平拉拔荷载 /
- 细粒土 /
- 承载特性 /
- 拉拔公式
Abstract: Reinforcement materials were usually used in the structure to ensure the foundation's stability and improve the tensile strength of the soil. The scrap tire grille was proposed as a new material for foundation reinforcement based on tensile resistance and interface roughness. The influence of different overburden loads, packing compaction degree, tire strip width, and mesh size on the bearing capacity of reinforced tire silt was studied by drawing test. The results show that the bearing capacity of reinforced tire silt increases with the overlying load. The denser the fine-grained soil filler is, the greater the peak pulling force of the tire strip is. Strip width has the most obvious effect on the reinforcement effect of silt soil foundation. When strip width increases by 2 cm, the peak pulling force increases by nearly 50%. The bearing capacity decreases with the mesh size increases. The results show that the scrap tire grille can improve the bearing capacity of silt soil foundation effectively and enhance the tensile strength of soil. The research provides a reference for further theoretical research and technical application.
- tire grille /
- horizontal drawing load /
- fine-grained soil /
- bearing characteristics /
- drawing formula

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图 1 拉拔试验仪简图

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图 2 粉土粒径分布曲线

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图 3 旋切得到的轮胎条带

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图 4 现场轮胎格栅铺设图

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图 5 旋切下轮胎试样拉伸力−应变曲线

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图 6 轮胎格栅形式

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图 7 拉拔试验流程图

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图 8 不同上覆荷载下轮胎条带拉拔荷载−位移曲线

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图 9 不同压实度下轮胎条带拉拔荷载−位移曲线

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图 10 不同宽度轮胎条带的拉拔荷载−位移曲线

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图 11 不同轮胎格栅孔径拉拔荷载−位移曲线（p=80 kPa）

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图 12 轮胎格栅界面图

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图 13 条带峰值拉拔力随法向应力变化图

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图 14 格栅峰值拉拔力随网格尺寸变化图

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表 1 粉土的颗粒组成特征

	配料含水量/%	实际含水量/%	湿密度ρ /（g·cm⁻³）	干密度ρ_d /（g·cm⁻³）
粉土	10.0	8.9	1.66	1.53
	12.0	12.0	1.72	1.54
	14.0	13.9	1.76	1.55
	16.0	16.2	1.83	1.58
	18.0	17.0	1.83	1.57
	20.0	20.0	1.80	1.55
均值	15.00	14.67	1.77	1.55

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表 2 旋切下轮胎条带拉伸试验均值

试样编号	2%应变		5%应变		10%应变		峰值应变
试样编号	拉伸力 F_2%/kN	拉伸强度 /（kN·m⁻¹）	拉伸力 F_5%/kN	拉伸强度 /（kN·m⁻¹）	拉伸力 F_10%/kN	拉伸强度 /（kN·m⁻¹）	拉伸力 F_max/kN	拉伸强度 /（kN·m⁻¹）	峰值应变 /%
1	1.036	51.800	2.917	58.340	7.382	73.820	7.685	73.190	10.500
2	1.020	50.989	2.759	55.184	6.709	67.090	8.526	67.670	12.600
3	1.047	52.350	2.759	55.180	6.867	68.670	8.370	66.960	12.500
4	0.764	38.200	2.202	44.040	6.499	64.990	6.689	64.320	10.400
5	1.016	50.800	2.716	54.320	6.794	67.940	8.254	69.360	11.900
均值	0.976	48.820	2.671	53.410	6.850	68.500	7.905	68.300	11.580

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表 3 不同筋材类型的对比试验工况

筋材类型	填料类型	条带宽度 /cm	填料压实度 /%	上覆荷载 /kPa	网孔尺寸 /cm
轮胎条带	粉土	2	90	80
		4
		6
		2	80	80
		2	85	80
		2	90	60
		2	90	100
轮胎格栅	粉土	2	90	80	10×10
					15×15
					20×20

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表 4 不同上覆荷载下轮胎条带的峰值拉拔力

上覆荷载/kPa	峰值拉拔力/kN	对应位移量/mm	初始模量/MPa
60	0.839	9.283	3.828
80	1.114	8.331	5.948
100	1.332	7.991	8.025

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表 5 不同压实度下轮胎条带的峰值拉拔力

压实度/%	峰值拉拔力/kN	对应位移量/mm	初始模量/MPa
80	0.759	6.900	4.213
85	0.899	7.950	5.044
90	1.120	8.250	5.765

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表 6 不同条带宽度下轮胎条带的峰值拉拔力

宽度 /cm	峰值拉拔力/kN	对应位移量/mm	单位宽度下的极限拉拔力/（kN·cm⁻¹）	横截面积/m²	初始模量/MPa
2	1.114	7.966	0.557	0.0003	9.326
4	1.778	7.277	0.444	0.0006	12.676
6	2.511	6.970	0.419	0.0009	21.084

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表 7 不同格栅孔径下轮胎条带的峰值拉拔力

网孔尺寸/cm	峰值拉拔力/kN	对应位移量/mm	初始模量/MPa
10×10	12.250	34.850	26.670
15×15	10.057	31.928	53.332
20×20	7.519	25.950	66.667

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表 8 不同法向应力下摩阻参数

法向应力 /kPa	条带宽度 /cm	加筋面积 /m²	内摩擦角 /(°)	有效接触面系数	摩擦阻力/kN
60	2	0.012	28.8	1.038	0.822
80					1.095
100					1.369

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表 9 不同网格尺寸下端阻计算参数

网格尺寸/cm	峰值拉拔力/kN	摩擦阻力/kN	条带总个数/个	横肋单元个数/个	横肋单元有效系数/kPa	横肋单元承载力/kN
10×10	12.250	1.095	10	5	122.125	0.164
15×15	10.057		8	4
20×20	7.519		6	3

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表 10 轮胎格栅峰值拉拔力计算结果

网格尺寸/cm	摩擦阻力/kN	端阻力P_RB /kN	峰值拉拔力/kN
10×10	10$ \mathrm{\mathit{P}}_{\mathrm{R}\mathrm{S}} $=10.950	1.499	12.449
15×15	8$ \mathrm{\mathit{P}}_{\mathrm{R}\mathrm{S}} $=8.760	1.199	9.959
20×20	$ 6\mathrm{\mathit{P}}_{\mathrm{R}\mathrm{S}} $=6.750	$ 0.900 $	7.650

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