| 填料粗粒含量对筋土界面拉拔性状的影响 |
| |
| 引用本文： | 王家全,康博文,周圆兀,唐滢.填料粗粒含量对筋土界面拉拔性状的影响[J].岩土力学,2022,43(5):1249-1260. |
| |
| 作者姓名： | 王家全 康博文 周圆兀 唐滢 |
| |
| 作者单位： | 1. 广西科技大学 土木建筑工程学院，广西 柳州 545006；2. 贺州学院 建筑与电气工程学院，广西 贺州 542899；
3. 广西壮族自治区岩土灾变与生态治理工程研究中心，广西 柳州 545006 |
| |
| 基金项目： | 国家自然科学基金项目（No.41962017）；;广西自然科学基金重点项目（No.2022GXNSFDA035081）；;广西研究生教育创新计划项目（No.YCSW2021310）； |
| |
| 摘 要： | 基于可视化拉拔系统及数字照相量测技术，针对5种不同粗粒含量 （粒径>5 mm颗粒的质量百分数）的粗粒土开展拉拔试验，探讨了粗粒含量 对筋土界面强度指标、颗粒位移演化及土工格栅应变等的影响。研究表明：界面黏聚力c与界面摩擦角 随 增加呈不同程度增加； 从20%增长至35%后，土工格栅末段出现应变及拉拔力峰值时所对应的格栅拉拔位移均减少，但各段土工格栅应变量增加；随着 的增加，筋土界面粗粒土颗粒位移矢量方向逐渐趋于水平，其位移量显著减小。同时，筋土界面空洞明显减少； 增加使筋土界面的粗粒土颗粒位移减小，而间接影响区范围扩大，使一定高度范围内的粗粒土颗粒被间接带动，在宏观上使界面似黏聚力增加； 增加后，位于筋土界面V3处的土颗粒最大位移速度减小。位于间接影响区的V1、V2处的土颗粒最大位移速度因受间接影响区范围扩大，颗粒扰动加强而有少量增大。
|
| 关 键 词： | 粗粒含量 土工格栅 界面强度 土工格栅应变 数字照相量测技术 |
| 收稿时间： | 2021-08-31 |
| 修稿时间： | 2022-01-13 |
Effect of coarse particle content on pull-out behavior
of reinforced-soil interface |
| |
| WANG Jia-quan,KANG Bo-wen,ZHOU Yuan-wu,TANG Ying.Effect of coarse particle content on pull-out behavior
of reinforced-soil interface[J].Rock and Soil Mechanics,2022,43(5):1249-1260. |
| |
| Authors: | WANG Jia-quan KANG Bo-wen ZHOU Yuan-wu TANG Ying |
| |
| Institution: | 1. College of Civil and Architectural Engineering, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, China;
2. College of Architecture and Electrical Engineering, Hezhou University, Hezhou, Guangxi 542899, China;
3. Guangxi Zhuang Autonomous Region Engineering Research Center of Geotechnical Disaster and Ecological Control, Liuzhou, Guangxi 545006, China |
| |
| Abstract: | Based on visualized pull-out system and digital photogrammetry measurement technology, pull-out tests were carried out for five kinds of coarse-grained soils with different coarse-grained contents (mass percentage of particles with particle size>5 mm). The effects of coarse-grained content on the interface strength index, particle displacement evolution and geogrid strain were discussed. The test results show that the interface cohesion c and the interface friction angle increase with increasing in different degrees. When increases from 20% to 35%, the pull-out displacements of geogrid corresponding to the peak value of strain and pull-out force at the end of geogrid decrease, but the geogrid strain increases at each section; with the increase of , the displacement vector direction of coarse-grained soil particles tends to be horizontal, and the displacement decreases significantly. At the same time, the void of the interface between reinforcement and soil decreases obviously. The increase of reduces the displacement of coarse-grained soil particles at the interface of reinforcement and soil, while the range of indirect influence zone expands, which indirectly drives coarse-grained soil particles within a certain height range, and increases the cohesive force of the interface at macroscopic scale. With the increase of , the maximum displacement velocity of soil particles at the V3 interface decreases. The maximum displacement velocities of soil particles at V1 and V2 in the indirect influence area increase slightly due to the expansion of the indirect influence area and the strengthening of particle disturbance. |
| |
| Keywords: | coarse particle content geogrid interfacial strength geogrid strain digital photogrammetry measurement technolog |
|
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
