| 宋达,岳建伟*,原江波,杨光辉,赵刚,杨豫川,王东涛.豫西北遗址土力学特性研究[J].实验力学,2019,34(1):121~130 |
| 豫西北遗址土力学特性研究 |
| Study of soil mechanical characteristics of ruins in northwest Henan Province |
| 投稿时间：2017-10-27 修订日期：2018-01-20 |
| DOI：10.7520/1001-4888-17-225 |
| 中文关键词: 遗址土 直接拉伸试验 抗拉强度 抗剪强度 双曲线强度公式 |
| 英文关键词:site soil uniaxial tension test tensile strength shear strength hyperbolic strength formula |
| 基金项目:国家自然科学基金青年项目(51508163)；河南省科技发展计划项目(162300410012)；河南省文物局基础研究项目 |
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| 中文摘要: |
| 为能综合考虑遗址土的抗拉抗剪力学特性，以豫西北遗址土为研究对象，通过三轴剪切试验和单轴拉伸试验，测定出豫西北遗址土的抗剪强度和抗拉强度，并对得到的的试验结果进行了分析，推导出遗址土的双曲线强度公式；鉴于土体实际的莫尔圆不能超过相应的破坏强度线，于是利用几何关系及应力关系对遗址土的强度破坏应力进行了修正，探究破坏莫尔圆与强度线相切的应力修正算法。研究结果表明，利用Mohr-Coulomb强度理论计算出的抗拉强度值明显高于拉伸试验测定值，所建立的遗址土双曲线强度公式能合理地反映出遗址土的抗拉、抗剪力学特性，因此上述结果可为遗址土的工程灾害评价和加固保护提供理论依据。 |
| 英文摘要: |
| In order to comprehensively consider the tensile and shear mechanical properties of the site soil, shear strength and tensile strength of site soil in northwest Henan Province were investigated through triaxial shear experiment and uniaxial tensile experiment. The test results of both strengths were analyzed and the hyperbolic strength formula of site soil was deduced. In view of the fact that the actual Mohr circle can not exceed the corresponding failure strength line of the soil, the strength and failure stress of the site soil was corrected by geometric relations and stress relations, and the stress correction algorithm to destroy the tangent between the Mohr circle and the strength line was explored. Results show that the tensile strength is calculated by using the Mohr-Coulomb strength theory was significantly higher than the tensile test value of soil, and the established hyperbolic strength formula of site soil can reasonably reflect the tensile and shear mechanical properties of site soil, and provide a theoretical basis for the engineering disaster evaluation and reinforcement protection of site soil. |
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