钻爆法施工隧道的超欠挖概率统计规律研究

STUDY ON THE LAW OF PROBABILITY STATISTICS FOR OVER EXCAVATING AND UNDER EXCAVATING DURING CONSTRUCTION OF TUNNEL BY DRILLING AND BLASTING METHOD

本文从隧道施工中实测， 获得Ⅲ、Ⅳ、Ⅴ类围岩超欠挖样本参数， 通过数理统计分析给出了各类围岩超欠挖的数字特征及概型分布，同时得出了各类围岩下超欠挖在隧道断面不同部位的分布规律， 作为隧道施工质量控制和隧道结构可靠性研究的参考。

Based on the practical measurements during tunnel construction,the specimen parameters of over excavating and under excavating for Ⅲ,Ⅳ&Ⅴseries of surrounding rocks are obtained.The numerical characteristics and the probability distributions of over excavating and under excavating for different series of surrounding rocks are put forward through numerical and physical statistics and analyses.At the same time,the law of distribution of over excavating and under excavating at different portion on tunnel section for different series of surrounding rocks are also obtained,which may be used for controlling the quality of construction and taken as reference for researching the reliability of the tunnel structure.