[1]张冰冰,宋 飞,李炜光,等.道路面层/基层废弃材料的三轴剪切试验与本构模型预估优化[J].长安大学学报(自然科学版),2024,44(6):11-22.[doi:10.19721/j.cnki.1671-8879.2024.06.002]
　ZHANG Bing-bing,SONG Fei,LI Wei-guang,et al.Triaxial shear test of road surface/base layer waste materials with optimization of its model prediction[J].Journal of Chang’an University (Natural Science Edition),2024,44(6):11-22.[doi:10.19721/j.cnki.1671-8879.2024.06.002]
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道路面层/基层废弃材料的三轴剪切试验与本构模型预估优化()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第44卷
期数:
2024年6期
页码:
11-22
栏目:
道路工程
出版日期:
2024-12-30

文章信息/Info

Title:
Triaxial shear test of road surface/base layer waste materials with optimization of its model prediction
文章编号:
1671-8879(2024)06-0011-12
作者:
张冰冰1; 2; 宋 飞1; 2; 李炜光1; 2; 金生斌3; 刘 娜4
(1. 长安大学 公路学院,陕西 西安 710064; 2. 民航机场智慧建造与维养重点实验室,陕西 西安 710064; 3. 中咨华科交通建设技术有限公司,北京 100179; 4. 山东公路技师学院,山东 济南 253020)
Author(s):
ZHANG Bing-bing1; 2;  SONG Fei1; 2;  LI Wei-guang1; 2;  JIN Sheng-bin3;  LIU Na4
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. The Key Laboratory of Intelligent Construction and Maintenance of CAAC, Xi'an 710064, Shaanxi, China; 3. Ciz-huake Transportation Construction Technology Co. Ltd., Beijing 100179, China; 4. Shandong College of Highway Technician, Jinan 253020, Shandong, China)
关键词:
道路工程;  面层/基层废弃材料;  三轴试验;  抗剪强度;  Duncan-Chang模型;  P-Z剪胀方程;  模型预估
Keywords:
road engineering;  road surface/base layer rejected material;  triaxial test;  shear strength;  Duncan-Chang model;  P-Z dilatancy equation;  model forecast
分类号:
U411
DOI:
10.19721/j.cnki.1671-8879.2024.06.002
文献标志码:
A
摘要:
为探究道路工程中老化废弃的面层沥青铣刨料和面基混合铣刨料的工程特性及相适应的预估优化本构模型,推进其在工程中的再应用,借助大型三轴剪切试验系统分别测试围压为100、200、300、400 kPa时,各试验材料强度和变形的变化规律,并对3种试验材料的偏差应力-轴向应变特征及体积应变-轴向应变特性进行分析,在此基础上对材料的抗剪工作机理进行探讨。结合各试验材料的力学工程特性建立面层沥青铣刨料采用Duncan-Chang模型的E-B模型、碎石料和面基混合铣刨料采用Duncan-Chang模型结合P-Z剪胀方程的预估优化模型,进而对试验结果进行验证。研究结果表明:碎石料和面基混合铣刨料试样表现为应变软化特征,面层沥青铣刨料试样呈应变硬化特性,随着围压的不断增加,3种试验材料特性均从脆性转变为延性; 不同围压下,面层沥青铣刨料与碎石料的强度差值为15%～21%,碎石料和面基混合铣刨料的强度较为接近(约5%),因此工程中面基混合铣刨料具有替代碎石料的潜质; 轴向应变不大于2%时,3种试验材料均表现为剪缩特征,轴向应变大于2%时,面层沥青铣刨料仍表现出明显的剪缩特征,碎石料和面基混合铣刨料表现出剪胀特性,且具有后期剪胀段减小的现象; 预估优化模型的计算结果均能与试验结果较好吻合,建立的预估优化模型可以较为准确地反映出碎石料和面基混合铣刨料的本构关系。研究成果能为实现道路工程中老化废弃材料的再应用提供一定的理论参考和借鉴。
Abstract:
In order to investigate the engineering characteristics of aged and abandoned surface asphalt milling planning material and face-base mixed milling material in road engineering and the corresponding prediction optimization constitutive model, and to promote its reapplication in engineering, with the help of a large triaxial shear test system, respectively, the peripheral pressure for the 100, 200, 300, 400 kPa, the change rule of the strength and deformation of the test material were tested. The deviatoric stress-axial strain characteristics and volumetric strain-axial strain characteristics of the three test materials were also analyzed, on the basis of which the shear working mechanism of the materials was discussed. By combining the mechanical engineering properties of each test material, an E-B model using the Duncan-Chang model for the surface asphalt milling material and a predictive optimization model using the Duncan-Chang model along with the P-Z shear equation for the crushed stone material and the face-base mixed milling material were established to validated the test results. The results show that all three test material properties changed from brittle to ductile with increasing circumferential pressure, and the crushed stone and face-base mixed milling material specimens displayed strain softening characteristics, while the surface asphalt milling material specimens displayed strain hardening characteristics. The face-base mixed milling material has the potential to replace crushed stone material in the project because the strength values of the two materials are closer(about 5%), whereas the strength differences between the surface asphalt milling material and crushed stone material under various perimeter pressures range from 15% to 21%. Before 2% axial strain, all three test materials show shear shrinkage characteristics, after 2% axial strain, the surface asphalt milling planes still show obvious shear shrinkage characteristics, while the gravel material and the face-base mixed milling planes show shear expansion characteristics, and have the phenomenon of the later shear expansion section decreases. The calculation results of the predictive optimization models can all be in good agreement with the test results, especially the established Duncan-Chang model combined with the predictive model of the P-Z shear expansion equation, which can more accurately reflect the intrinsic relationship between the crushed stone material and the face-base mixed milling material. The research results can provide certain theoretical reference and reference for realizing the reapplication of aging waste materials in road engineering.3 tabs, 8 figs, 43 refs.

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备注/Memo

备注/Memo:
收稿日期:2023-11-27
基金项目:国家自然科学基金项目(52278328); 中咨集团科技研发项目(zzkj-2022-06)
作者简介:张冰冰(1992-),男,河南洛阳人,工学博士研究生,E-mail:849206078@qq.com。
通讯作者:宋 飞(1980-),男,陕西汉中人,教授,博士研究生导师,E-mail:songf1980@163.com。
更新日期/Last Update: 2024-12-30