瓜尔胶处理纤维增强黄土护坡材料界面性能及损伤强度模型

IF 10 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Huaixin Li , Changgen Yan , Jing Ren , Yuling Shi , Han Bao , Zhuolong Jia , Zherui Liang
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引用次数: 0

摘要

黄土高原地区浅层边坡破坏频繁发生,通常采用生态材料进行边坡防护。环保材料与天然材料界面的力学特性和强度模型是评价边坡防护效果的关键。本研究采用聚丙烯纤维和瓜尔胶作为护坡材料,通过室内试验研究了不同含水率和养护时间下未经处理的黄土(UL)和经瓜尔胶处理的纤维增强黄土(GFL)界面的力学性能变化。基于统计损伤理论,建立了未处理黄土与瓜尔胶处理纤维增强黄土(UL−GFL)界面的损伤强度模型。结果表明:瓜尔胶对黄土颗粒具有集料和胶结作用,而聚丙烯纤维增强了黄土颗粒集料之间的摩擦力。两种材料的协同作用显著改善了黄土的强度和水力特性。未经处理的黄土与经瓜尔胶处理的纤维增强黄土界面的黏聚力和内摩擦角随含水率的增加而减小,随养护时间的延长而增大,养护时间超过7 d后趋于稳定。建立了未经处理的黄土与经瓜尔胶处理的纤维增强黄土界面强度模型。基于应力-位移关系的实验数据验证了该模型的正确性。研究结果可为生态防护材料在黄土边坡上的应用提供重要参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interface performance and damage strength model of guar gum−treated fiber−reinforcement loess slope protection material
Shallow slope failures occur frequently in the Loess Plateau region and the ecological materials are usually used for slope protection. The mechanical characteristics and strength models of the interface between environmental protection materials and native materials are crucial for evaluating the effectiveness of slope protection. In this study, the polypropylene fiber and guar gum are used for slope protection, and indoor experiments are conducted to elucidate the mechanical performance changes at the interface between untreated loess (UL) and guar gum−treated fiber−reinforcement loess (GFL) under different moisture content and curing time. A damage strength model of the interface between untreated loess and guar gum−treated fiber−reinforcement loess (UL−GFL) is constructed based on statistical damage theory. The results show that guar gum can aggregate and cement loess particles, while polypropylene fiber enhances the friction between loess particle aggregates. The synergistic effect of these two materials significantly improves the strength and hydraulic characteristics of loess. The cohesion and internal friction angle of the interface between untreated loess and guar gum−treated fiber−reinforcement loess decrease with an increase in moisture content and increase with an extended curing time, stabilizing when the curing time exceeds 7 days. The strength model for the interface of untreated loess and guar gum−treated fiber−reinforcement loess is established. The proposed model is verified through experimental data based on the stress−displacement relationship. The findings of this research can provide an important reference for the application of ecological protection materials on loess slopes.
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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