基于Hoek-Brown强度准则的近接交叉隧道围岩参数计算方法  

A Method for Calculating Surrounding Rock Parameters of Close-spaced Crossing Tunnel Based on Hoek-Brown Strength Criterion

作　　者：谢宝琎 张向东[1] 

机构地区：[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000 [2]中铁七局集团第三工程有限公司,陕西西安710000

出　　处：《公路交通科技》2016年第12期101-105,139,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金委员会-神华集团有限公司煤炭联合基金项目(51174268);辽宁省自然科学基金项目(201202095)

摘　　要：为利用在工程领域中使用广泛的Hoek-Brown强度准则,须对此进行修正,使其适用于各向异性岩石力学参数的计算。本文综合考虑了交叉隧道净距对围岩强度的影响,将Hoek-Brown准则中的扰动系数与净距关系进行量化并经过理论推导和数值模拟验算,得到了在上下隧道不同净距影响下的修正后Hoek-Brown公式。利用修正后的强度公式计算出结果与实测数据对照,结果相吻合。表明了修正后的Hoek-Brown强度公式能更好的反映出交叉隧道围岩的真实变形情况。To use Hoek-Brown strength criterion which has a wide using range in the engineering field,it must be amended to make it suitable for calculating the anisotropy rock mechanical parameters. Considering the influence of clear distance of crossing tunnel on the strength of surrounding rock comprehensively,the relation between disturbance coefficient and clear distance in Hoek-Brown strength criterion is quantified,and the revised Hoek-Brown formula under the influence of different clear distances of up-down tunnels is obtained through theoretical derivation and numerical checking calculation. The result calculated by the modified strength formula coincides with the measured data,which indicates that the revised Hoek-Brown strength formula can better reflect the real deformation conditions of the surrounding rocks of crossing tunnels.

关 键 词：桥隧工程 近交叉隧道 修正Hoek-Brown强度公式 理论推导 修正 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]