Abstract: Study on the on-site deformation test of rock mass in Tianxing reservoir// by WANG Honghang// Gansu Water Resources and Hydropower Survey, Design and Research Insitute Co., Ltd.
Abstract: During the survey and design of Tianxing reservoir dam, a detailed analysis of geological con ⁃ ditions is conducted, and on-site test of deformation of dam foundation rock mass is conducted. The test results  show  that  there  are  three types  of deformation  curves  of dam foundation  rock  mass,  namely straight line, upward convex and downward concave. As well, the closer to the tunnel face, the more the rock mass integrity improves, and the deformation modulus and elastic modulus of rock mass show a gradually increasing trend. The test results provide a theoretical basis and data support for the survey and design of the reservoir dam, and provide important references for dam filling construction, which is of great significance in construction engineering.

Key words: survey and design, deformation of rock mass, deformation curve, deformation modulus, elas ? tic modulus

摘要： 在天星水库大坝勘测设计过程中，对工程地质条件进行了详细分析，并对坝基岩体的变形进行了现场试 验。试验检测结果表明：坝基岩体现场变形存在3种变形曲线，即直线型变形模式、向上凸型变形模式和向下凹 型变形模式；离平硐掌子面越近，岩体的整体性不断提高，岩体的变形模量和弹性模量呈逐渐增大的趋势。试验 结果为水库大坝勘测设计提供了理论基础和数据支持，为大坝填筑施工提供了重要参考，在工程建设中具有重要 意义。

关键词: 勘测设计, 岩体变形, 变形曲线, 变形模量, 弹性模量