循环荷载作用下GRPS路堤土工格栅长期应变研究

IF 2.8 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL
K.-F. Liu, K.-R. Xue, Ming Wen, L. Wang
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引用次数: 1

摘要

土工格栅是一种用于软土高速公路土工合成材料加筋桩支护(GRPS)路堤的水平加固材料。然而,土工格栅在循环荷载作用下的长期变形机理还不够清楚。本文对GRPS路堤进行了实验室模型研究,以研究循环荷载作用下的长期土工格栅应变。研究了荷载循环次数、荷载频率、土工格栅层数和支撑桩长度等参数对土工格栅长期应变的影响。结果表明,土工格栅应变随荷载循环次数的增加而增加,主要在前10000次荷载循环中发展,后期缓慢增加。当频率从1 Hz增加到5 Hz时,土工格栅应变急剧增加。与单层土工格栅的情况相比,两层土工格栅上层引起的土工格栅应变较小。与长桩和短桩GRPS路堤相比,长短桩GRPS路基具有足够的土工格栅膜效应。最后,本文提出的95%的预测区间可以用对数函数表示,为未来的工程应用提供了理论基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation on the long-term strain of geogrid in GRPS embankmentunder cyclic loading
Geogrid is a horizontal reinforcement material that is used in geosynthetic-reinforced pile-supported (GRPS) embankment in freeways with soft soil. Nevertheless, the long-term deformation mechanics of geogrid in the GRPS embankmentunder cyclic loading is not clear enough. This paper presents a laboratory model study of a GRPS embankment to study the long-term geogrid strain under cyclic loading. The effects of parameters such as number of load cycles, load frequency, geogrid layer numbers, and length of supporting piles on the long-term strain of geogrid were investigated. The results showed that geogrid strain increased with the number of load cycles, mainly developed in the first 10,000 load cycles and increased slowly in the later period. When the frequency was increased from 1 to 5 Hz, geogrid strain increased dramatically. When compared with the condition of a single geogrid layer, the upper layer of two geogrid layer caused a less geogrid strain. Compared with long piles and short piles GRPS embankments, a sufficient membrane effect of geogrid was found for long-short piles GRPS embankment. Finally, 95 percent prediction interval proposed in this paper could be expressed using a logarithmic function, providing a theoretical foundation for future engineering applications.
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来源期刊
Geosynthetics International
Geosynthetics International ENGINEERING, GEOLOGICAL-GEOSCIENCES, MULTIDISCIPLINARY
CiteScore
6.90
自引率
20.00%
发文量
91
审稿时长
>12 weeks
期刊介绍: An online only, rapid publication journal, Geosynthetics International – an official journal of the International Geosynthetics Society (IGS) – publishes the best information on current geosynthetics technology in research, design innovation, new materials and construction practice. Topics covered The whole of geosynthetic materials (including natural fibre products) such as research, behaviour, performance analysis, testing, design, construction methods, case histories and field experience. Geosynthetics International is received by all members of the IGS as part of their membership, and is published in e-only format six times a year.
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