纤维加筋黄土抗压强度试验及估测模型研究

doi:10.3724/1000-6915.jrme.2024.0495

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摘要为研究纤维加筋黄土的抗压强度特性，并构建相应的强度估测模型。通过无侧限抗压强度试验分析不同纤维掺量、纤维长度、纤维细度以及含水率对加筋黄土抗压强度的影响，结合扫描电镜(SEM)试验从微观角度对纤维加固机制和宏观力学性质进行分析。试验结果表明，纤维加筋黄土的抗压强度随纤维掺量和纤维长度的增加以及纤维细度的减小而提高，本文的纤维长度在10～40 mm范围均能提高加固作用；在纤维掺量不超过临界掺量的情况下，增大纤维长度并减小纤维细度更有利于土体加固。基于试验数据，进一步建立可量化评价纤维加固作用的加筋参数Ir，并建立加筋黄土的强度估测模型，该模型能够较为准确地估测纤维加筋黄土的抗压强度。通过与试验结果对比验证，模型的预测精度较高，具有实际应用价值。

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	褚峰1
	祝瑜光1
	邵生俊2
	陈挺1
	张丹东1
	吴云超1
	陈存礼2

关键词 ：土力学, 纤维加筋土, 抗压强度, 加筋参数, 强度估测, 加筋机制

Abstract：To investigate the compressive strength characteristics of fiber-reinforced loess and develop a corresponding strength estimation model，unconfined compressive strength tests were conducted to analyze the effects of varying fiber content，fiber length，fiber fineness，and moisture content on the compressive strength of reinforced loess. Combined with scanning electron microscopy(SEM) tests，the reinforcement mechanism and macro-mechanical properties of the fiber-reinforced soil were analyzed from a microscopic perspective. The test results indicate that the compressive strength of fiber-reinforced loess increases with higher fiber content，greater fiber length，and reduced fiber fineness；within the studied fiber length range of 10 to 40 mm，fiber reinforcement was effective. When fiber content is below a critical level，increasing fiber length and reducing fiber fineness further enhance soil reinforcement. Based on the test data，a reinforcing parameter Ir was developed to quantitatively evaluate the reinforcement effect，and a strength estimation model for fiber-reinforced loess was established. This model can accurately estimate the compressive strength of fiber-reinforced loess. Comparison with experimental results verifies that the model has high prediction accuracy and practical application value.

Key words： soil mechanics fiber reinforced soil compressive strength reinforcement parameter strength estimation reinforcement mechanism

引用本文:

褚峰1，祝瑜光1，邵生俊2，陈挺1，张丹东1，吴云超1，陈存礼2. 纤维加筋黄土抗压强度试验及估测模型研究[J]. 岩石力学与工程学报, 2025, 44(4): 1040-1052.
CHU Feng1，ZHU Yuguang1，SHAO Shengjun2，CHEN Ting1，ZHANG Dandong1，WU Yunchao1，CHEN Cunli2. Study on compressive strength test and estimation model of fiber reinforced loess. , 2025, 44(4): 1040-1052.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2024.0495 或 https://rockmech.whrsm.ac.cn/CN/Y2025/V44/I4/1040

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