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湖北工业大学土木建筑与环境学院河湖健康智慧感知与生态修复教育部重点实验室
Published:2026
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李丽华, 张永帅, 叶治, et al. 加筋废弃钢渣混合土循环剪切性能[J]. Bulletin of Geological Science and Technology, 2026, 45(1): 2-14.
李丽华, 张永帅, 叶治, et al. 加筋废弃钢渣混合土循环剪切性能[J]. Bulletin of Geological Science and Technology, 2026, 45(1): 2-14. DOI: 10.19509/j.cnki.dzkq.tb20240341.
为改善黏土工程特性和增加废弃钢渣(SS)利用率,铺设土工格栅加筋,然后对钢渣-黏土混合土、砂-黏土混合土及黏土分别进行了直剪试验、循环剪切试验和循环后直剪试验,研究了不同钢渣掺量、竖向应力、含水率、剪切幅值条件下,混合土筋-土界面强度特征、阻尼比、剪切刚度变化和混合土体位移情况。结果表明:钢渣可以显著提高黏土筋-土界面剪切应力,且改良效果优于常规材料砂改良黏土;钢渣-黏土混合土具有较大阻尼比和剪切刚度,说明其具有较好的减震耗能性。其中,40%钢渣掺量下的钢渣-黏土混合土剪切应力、阻尼比和剪切刚度较优;相较于循环前直剪,经过循环荷载作用后钢渣-黏土混合土剪切应力有所提升。此外,与竖向应力和剪切幅值相比,含水率对钢渣-黏土混合土的剪切应力、剪切刚度和阻尼比有较大影响。钢渣-黏土混合土在循环剪切荷载作用下,可以呈现更好的减震耗能性,研究成果可为钢渣代替砂改良黏土提供理论依据。
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