路基压实状态与碾压动土压力的关联性分析

张荣华; 王育杰; 董超; 王新宇; 蒋红光; 姚占勇

doi:10.20265/j.cnki.issn.1007-2993.2023-0534

路基压实状态与碾压动土压力的关联性分析

doi: 10.20265/j.cnki.issn.1007-2993.2023-0534

1.
山东高速济青中线有限公司，山东潍坊　261500
2.
山东大学齐鲁交通学院，山东济南　250061

详细信息

作者简介:
张荣华，男，1995年生，硕士，主要从事高速公路建设管理研究。E-mail：1051666359@qq.com

通讯作者:
蒋红光，男，1985年生，博士，主要从事交通岩土工程研究。E-mail：hongguang_jiang@sdu.edu.cn

中图分类号: U416.1
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- 文章访问数: 7
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- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2023-05-09
- 修回日期: 2023-09-17
- 录用日期: 2023-11-08
- 刊出日期: 2025-02-21

Correlation analysis between subgrade compaction state and rolling dynamic soil pressure

1.
Shandong Expressway Jiqing Middle Line Highway Co., Ltd., Weifang 261500, Shandong, China
2.
School of Qilu Transportation, Shandong University, Jinan 250061, Shandong, China

摘要

摘要: 路基压实状态与碾压动土压力密切相关，为此开展了土压力传感器室内标定试验。标定试验显示砂标系数与厂家标定系数相差65%以上，论证了根据传感器的实际工程状态选择相应介质进行标定试验的必要性。在此基础上明晰了标定系数与压实状态的关系，建立了标定系数–砂土介质压实度关系曲线，提出了标定系数与介质压实度关系的归一化方程。路基碾压土压力的实测数据显示，按实际介质标定系数修正后的实测值与Boussinesq解理论值的偏差更小，较厂家标定系数下的实测值平均降低29.4%。
- 高速公路 /
- 路基压实 /
- 土压力传感器 /
- 标定系数 /
- 压实状态
Abstract: To ensure subgrade compaction quality, the correlation between compaction state and rolling dynamic soil pressure was investigated. An indoor calibration test of soil pressure sensors was conducted, revealing a difference of over 65% between the sand calibration coefficient and the manufacturer's coefficient. This emphasized the necessity of selecting the medium based on actual engineering conditions for calibration. The relationship between the calibration coefficient and compaction state was clarified, leading to the establishment of a calibration coefficient - sand compaction degree curve and a normalization equation. Field measurements show that correcting measured values using actual medium calibration coefficients reduces the deviation from the Boussinesq theoretical solution by an average of 29.4%, compared to using the manufacturer’s coefficients.
- highway /
- subgrade compaction /
- soil pressure sensor /
- calibration coefficient /
- compaction state

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图 1 试验材料

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图 2 试验加载装置

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图 3 加载–卸载循环标定软件界面

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图 4 典型标定试验结果

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图 5 标定系数与压实度关系曲线

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图 6 标定系数的归一化曲线

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图 7 土压力现场测试

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图 8 附加应力的修正曲线

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表 1 土压力传感器参数

序号	传感器编号	直径/mm	厚度/mm	量程/MPa
1	18356	16	4.8	0.3
2	21683	16	4.8	0.3
3	21684	16	4.8	0.3

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表 2 压实度工况

传感器编号	压实度1 /%	压实度2 /%	压实度3 /%	压实度4 /%	压实度5 /%
18356	89.01	92.88	94.52	96.23	97.99
21683	89.27	92.35	93.15	94.80	96.51
21684	89.25	91.53	93.13	94.78	96.48

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表 3 加载–卸载循环工况

加载阶段			卸载阶段
序号	应力/MPa	试验力/kN	序号	应力/MPa	试验力/kN
1	0.03	0.53	11	0.27	4.77
2	0.06	1.06	12	0.24	4.24
3	0.09	1.59	13	0.21	3.71
4	0.12	2.12	14	0.18	3.18
5	0.15	2.65	15	0.15	2.65
6	0.18	3.18	16	0.12	2.12
7	0.21	3.71	17	0.09	1.59
8	0.24	4.24	18	0.06	1.06
9	0.27	4.77	19	0.03	0.53
10	0.3	5.3	20	0	0

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表 4 砂标与厂家标定系数对比

传感器编号	厂家标定系数 /(MPa·µε⁻¹)	砂标系数 /(MPa·µε⁻¹)	偏差 /%
18356	1.80×10⁻⁴	5.88×10⁻⁴	227
21683	2.29×10⁻⁴	4.20×10⁻⁴	83
21684	2.82×10⁻⁴	4.67×10⁻⁴	67

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表 5 标定系数与压实度拟合曲线参数

传感器编号	A₁	A₂	K₀	p	R²
18356	5.72×10⁻⁴	7.43×10⁻⁴	91.99	70.56	0.99
21683	4.01×10⁻⁴	5.20×10⁻⁴	91.49	68.70	0.99
21684	4.55×10⁻⁴	5.80×10⁻⁴	91.79	77.49	0.99

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