摘要
为了验证Q系统围岩分级及支护设计方法在大型地下洞室的适用性,文章依托锦州大型地下储油洞库工程,基于现场Q值统计数据与地质素描成果,并结合Q值相关的经验公式,建立了Q值与RMR值、BQ值的数学函数关系,得到了Q值与围岩主要力学参数的相关性,并提出了现场Q值快速获取的方法。研究结果表明,Q值与RMR值成对数函数关系,相关系数高达0.99,两种方法得到的围岩分级基本相同;Q值与BQ值成线性函数关系,相关系数高达0.92;在Q值及RMR值较小时,由BQ法得到的围岩分级与上述两者基本相同,但当Q值及RMR值较大,由此得到的围岩级别较高时,由BQ值得到的围岩级别大约相差一个级别。文章建立了Q值相关常用数据定量表,在无法取得现场实测值的情况下,可通过查表得到相对较为准确的参数值。
In order to verify the applicability of surrounding rock classification and support design method based on Q system in large underground caverns, taking Jinzhou large underground oil storage cavern project as an example, the mathematical function relationship among Q value, RMR value and BQ value was established in light of the statistical data of the Q value and geological sketch at the construction site as well as the empirical formula of Q value,furthermore the correlation between Q value and the main mechanical parameters of surrounding rocks was obtained, and the method of rapid obtaining Q value was put forward. The result shows that the Q value is in a logarithmic function with the RMR value with the coefficient of 0.99 and almost the same grade levels of surrounding rocks can be obtained by the two methods;the Q value is linearly related to the BQ value with the coefficient of 0.92;the surrounding rock classification obtained by BQ method is basically the same as that obtained by the two methods mentioned above if the Q value and the RMR value are smaller, while there is a difference of one level for the surrounding rock classification obtained by BQ method if the Q value and the RMR value are larger and the determined classification of surrounding rock is relatively high. The relatively accurate parameter values can be obtained by referencing the proposed corresponding table between common parameters and Q values when the measured values cannot be obtained.
作者
张恒
张港
孙建春
朱亦墨
陈寿根
ZHANG Heng;ZHANG Gang;SUN Jianchun;ZHU Yimo;CIIEN Shougen(Southwest Jiaotong University, Chengdu 610031)
出处
《现代隧道技术》
EI
CSCD
北大核心
2019年第5期26-34,共9页
Modern Tunnelling Technology
基金
中央高校基本科研业务费专项资金（SWJTU11ZT33）
教育部创新团队发展计划（IRT0955）
关键词
地下洞库
Q值法
支护设计
围岩参数
相关性
Underground cavern
Qvalue method
Support design
Parameters of surrounding rocks
Correlation
