节理岩体强度和变形模量的经验估算方法

Empirical Estimating Method for Strength and Deformation Moduli of Jointed Rock Mass

确定节理岩体强度和变形模量的途径有三:原位试验法、经验法和解析数值法。前者受时问和资金的限制而难以大量采用;后者因种种假设以及参数确定的人为性或困难性而难以使人信服,经验法则以岩块试验和现场地质调查为基础,根据理论和实践经验而提出的;经受了一定的时间考验,具有较好的置信度,因而在全球范围内被广泛采用。本文介绍了霍克-布朗(Hoek-Brown)经验判据、夹格尔(Jaeger)单弱面理论、希诺(Sheroey)等人经验判据、拉太(lajtai)经验公式推求节理岩体强度;介绍了布艾希凯(Bieniawski)、希拉菲门(Serafim)和皮内纳(Pereira)、巴尔通(Barton)等人的经验方程估算节理岩体的变形模量;最后给出了工程实例。

Because time and costs limits of in-situ tests and the difficulties for determing parameters in analytic numerical method, the empirical estimating method is prefered. In light of theory and experince, the method is proposed based on rock mass tests and field geological investigation. Because the method is credible and goes through the trials of time, it is adopted widely throughout the world. The empirical criterions of Hoek-Brown and Sheorey et al, Jaeger's single weak plane theory and Lajtai's empirical equation are introduced to obtain strength of jointed rock mass. Deformation module for jointed rock masses estimated empirical equations presented by Bieniawski, Serafim, Pereira and Barton et al are introduced. Some engineering examples are provided.