隧道深孔勘察资料综合分析与围岩分级应用  

Comprehensive Analysis of Tunnel Deep Hole Survey Data and Application of Surrounding Rock Classification

作　　者：张广泽[1] 沈维[1] 徐学渊 陈伟[1] 柴春阳[1] 袁传保[1] 刘芝勇 王振友[1] 曾德建[1] ZHANG Guangze;SHEN Wei;XU Xueyuan;CHEN Wei;CHAI Chunyang;YUAN Chuanbao;LIU Zhiyong;WANG Zhenyou;ZENG Dejian(China Railway Eryuan Engineering Group Co.Ltd,Chengdu,Sichuan 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《铁道工程学报》2023年第8期12-17,61,共7页Journal of Railway Engineering Society

摘　　要：研究目的:西南艰险山区复杂地质的深埋长大隧道普遍存在受构造挤压强烈、结构面发育、岩体破碎、围岩变化频繁、变更率高的问题。本文通过建立钻孔实际围岩分级与预测围岩分级的电磁测深物探参数分级的关系,指导隧道洞身围岩预测的方法研究,并提出相应勘察工作方法建议,为提高艰险山区复杂地质铁路隧道围岩分级提供借鉴。研究结论:(1)分析深孔岩芯围岩分级与物探参数对应关系,指导隧道围岩分级方法,可提高整体围岩分级优劣及其比例预测的准确性;(2)通过针对性加密深孔等勘察工作、控制深孔质量、加强深孔与地面物探资料的综合分析,更利于准确查明隧道的地层岩性结构特征及岩体的完整性,可进一步提高围岩分级精度;(3)本文所述围岩分级方法及勘察工作方法适用于西南山区复杂地质长大隧道。Research purposes:Deep buried long tunnels with complex geological conditions in the difficult and dangerous mountainous areas of southwestern China generally face problems such as strong tectonic compression,developed structural planes,fractured rock masses,frequent changes in surrounding rocks,and high change rates.This paper establishes the relationship between the classification of actual surrounding rock in drilling and the classification of electromagnetic sounding geophysical parameters for predicting the classification of surrounding rock,guiding the research on the prediction method of tunnel body surrounding rock,and proposing corresponding exploration work methods and suggestions,aiming to provide reference for improving the classification of complex geological railway tunnel surrounding rock in difficult mountainous areas.Research conclusions:(1)Analyzing the relationship between surrounding rock classification of deep hole rock core and geophysical parameters,and guiding the surrounding rock classification method of tunnel,can improve the accuracy of overall surrounding rock classification and its proportion prediction.(2)Through targeted deep hole densification and other exploration work,controlling the quality of deep holes,and strengthening the comprehensive analysis of deep hole and ground geophysical exploration data,it is more conducive to accurately identify the characteristics of the stratum lithology structure of the tunnel and the integrity of the rock mass,which can further improve the accuracy of surrounding rock classification.(3)The surrounding rock classification method and survey method are applicable to large tunnels with complex geology in southwest mountainous areas.

关 键 词：围岩分级 综合分析 勘察工作布置 

分 类 号：P642[天文地球—工程地质学]