填料粗粒含量对筋土界面拉拔性状的影响

doi:10.16285/j.rsm.2021.1468

岩土力学 ›› 2022, Vol. 43 ›› Issue (5): 1249-1260.doi: 10.16285/j.rsm.2021.1468

填料粗粒含量对筋土界面拉拔性状的影响

王家全¹，康博文²，周圆兀^{1, 3}，唐滢^{1, 3}

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

收稿日期:2021-08-31 修回日期:2022-01-13 出版日期:2022-05-11 发布日期:2022-05-02
通讯作者: 周圆兀，男，1972年生，博士，副教授，主要从事岩土工程方面的研究。E-mail: greenzyp@126.com E-mail:wjquan1999@163.com
作者简介:王家全，男，1981年生，博士，教授，主要从事加筋土结构、地基基础工程、土木工程灾害防治等方面的研究。
基金资助:
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）；广西高等学校高水平创新团队及卓越学者计划项目（桂教人才[2020]6号）；广西研究生教育创新计划项目（No. YCSW2021310）；贺州学院科研项目（No. 2021ZZZK13）

Effect of coarse particle content on pull-out behavior of reinforced-soil interface

WANG Jia-quan¹, KANG Bo-wen², ZHOU Yuan-wu^{1, 3}, TANG Ying^{1, 3}

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

Received:2021-08-31 Revised:2022-01-13 Online:2022-05-11 Published:2022-05-02
Supported by:
This work was supported by the National Natural Science Foundation of China(41962017), the Key Program of Natural Science Foundation of Guangxi Province (2022GXNSFDA035081), the High Level Innovation Team and Outstanding Scholars Program of Guangxi Institutions of Higher Learning of China, the Innovation Project of Guangxi Graduate Education(YCSW2021310) and the Scientific Research Project of Hezhou University (2021ZZZK13).

摘要/Abstract

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

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.

Key words: coarse particle content, geogrid, interfacial strength, geogrid strain, digital photogrammetry measurement technolog

中图分类号:

TU 411

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.

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.

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填料粗粒含量对筋土界面拉拔性状的影响

Effect of coarse particle content on pull-out behavior of reinforced-soil interface

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