回弹值与岩体特性指标定量关系

发布时间：2018-05-07 12:09

本文选题：回弹值 + 斜长花岗岩　；参考：《科学技术与工程》2017年33期

【摘要】：以金沙江叶巴滩水电站坝址区工程地质岩体为研究对象,现场测试23号平硐(PD23)、50号平硐(PD50)的波速(V_p)、RQD、回弹值(R)。先分析V_p、RQD、R随硐深的变化关系,再揭示回弹值与波速、RQD、风化程度之间的关系,建立定量模型,提出采用R对工程区部分平硐岩体特性指标(V_p、RQD)进行估算和风化程度等级的判断。研究表明:斜长花岗岩回弹值随波速增加而增加,呈指数关系,PD23和PD50的相关系数皆为0.84;回弹值随RQD增加而增加,呈线性关系,PD23和PD50的相关系数分别为0.83和0.87;风化程度越强,回弹值呈相应程度降低,变化规律呈良好的相关性。
[Abstract]:Taking the engineering geological rock mass in the dam site area of Yipatan Hydropower Station on the Jinsha River as the research object, the wave velocities of No. 23 Adit PD23, 50 Adit PD50) were tested in situ. This paper first analyzes the relationship between VpP RQDU R and cave depth, then reveals the relationship between rebound value and wave velocity, RQD, weathering degree, establishes a quantitative model, and puts forward a quantitative model for estimating and judging weathering degree of rock mass characteristic index VpRQDof part of adit in engineering area by using R. The results show that the springback increases with the increase of wave velocity, and the correlation coefficients of PD23 and PD50 are both 0.84.The springback values increase with the increase of RQD, and the correlation coefficients of PD23 and PD50 are 0.83 and 0.87, respectively, and the weathering degree is stronger. The springback value decreased to a corresponding extent, and the variation law showed a good correlation.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室环境与土木工程学院;
【基金】：国家重点基础研究发展计划(973计划)(2011CB013501) 国家自然科学基金(42272333)资助
【分类号】：TU45;TV221.2

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