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对利用原位直剪试验法向压缩变形曲线求取弹性模量的两种传统方法进行了分析和探讨,认为利用压缩曲线法和间接现场荷载试验法的经验公式计算出的结果均小于实际值。提出了一种新的利用原位直剪压缩曲线求取弹性模量的综合方法,同时采用3种方法求取了岭澳3期工程强风化角岩的弹性模量。分析表明,原位直剪试验压缩曲线综合法求得的弹性模量为压缩曲线法与间接现场荷载法取值之和,其计算原理与直剪试验法向加载时力学变形机制一致,计算值更接近于真实值,有效地解决了边坡岩体变形稳定性分析中弹性模量取值问题。
The two traditional methods of calculating the elastic modulus by using the normal compressive deformation curve of in-situ direct shear test are analyzed and discussed. The results of the empirical formula using the compression curve method and the indirect field load test method are both less than the actual values . A new method for obtaining elastic modulus by in-situ direct shear compression curve was proposed. Three elastic modulus of strong weathered angle rock of Lingao-A-3 project was obtained at the same time. The analysis shows that the elastic modulus calculated by in-situ shear compression test is the sum of compressive curve method and indirect on-site load method. The calculation principle is consistent with the mechanical deformation mechanism under normal load in direct shear test, and the calculated value More close to the true value, effectively solve the slope rock mass deformation stability analysis of elastic modulus value problem.