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朱敏,倪万魁,李向宁,等. 黄土掺入聚丙烯纤维后的无侧限抗压强度和变形试验研究[J]. 科学技术与工程, 2020, 20(20): 8337-8343.
ZHU Min,LI Xiang-ning,et al.Study on unconfined compressive strength and deformation after incorporating polypropylene fiber into loess[J].Science Technology and Engineering,2020,20(20):8337-8343.
黄土掺入聚丙烯纤维后的无侧限抗压强度和变形试验研究
Study on unconfined compressive strength and deformation after incorporating polypropylene fiber into loess
投稿时间:2020-01-20  修订日期:2020-04-15
DOI:
中文关键词:  黄土  聚丙烯纤维 正交试验  抗压强度 变形模量
英文关键词:Loess  fiber orthogonal  test compressive  strength deformation  modulu
基金项目:陕西省重点研发项目(2019ZDLSF05-07)
              
作者单位
朱敏 Chang’an University
倪万魁 陕西省西安市雁塔区雁塔南路126号
李向宁 长安大学
王海曼 长安大学
赵乐 长安大学
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中文摘要:
      为提高西咸新区空港新城地区地基黄土强度指标,设计正交试验方案L9(34),研究含水率、聚丙烯纤维长度、聚丙烯纤维掺量三种因素对黄土的抗压强度和变形的影响,通过对加筋黄土的无侧限抗压强度,变形模量进行极差和方差分析,获得三种因素的影响程度和显著水平,同时设置了各含水率水平下不掺加纤维的空白对照。结果表明不同含水率下的纤维加筋土无侧限抗压强度改良效果不同,在19.5%含水率时最高,强度提升了2.1倍;聚丙烯纤维加筋黄土无侧限抗压强度的最优掺和长度为12mm,最优掺量为0.5%;聚丙烯纤维的加入对变形模量的影响并不显著,变形模量变化受含水率影响较大;聚丙烯纤维长度取12mm,掺量取0.3%时变形模量最优。
英文摘要:
      In order to improve the strength index of compacted loess in airport new town area of Xixian new area, the orthogonal test plan L9 (34) was designed to study the influence of moisture content, polypropylene fiber length and polypropylene fiber content on the compressive strength and deformation of compacted loess. Through the analysis of range and variance of unconfined compressive strength and deformation modulus of reinforced yellow soil, the influence of three factors was obtained At the same time, the blank control without fiber was set up. The results show that the improvement effect of the unconfined compressive strength of fiber reinforced soil is different under different water content, which is the highest at 19.5% water content, 2.1 times higher; the optimal mixing length of the unconfined compressive strength of polypropylene fiber reinforced loess is 12mm, the optimal mixing amount is 0.5%; the effect of the addition of polypropylene fiber on the deformation modulus is not significant, the change of the deformation modulus is controlled by the water content, and the polypropylene fiber is not significant When the dimension length is 12mm and the content is 0.3%, the deformation modulus is relatively optimal.
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