深埋小净距隧道群围岩压力计算方法探究  

Ground Pressure Calculation for Deep Buried Neighborhood Tunnels

作　　者：杨勇 诸岧 关振长[2] YANG Yong;ZHU Tiao;GUAN Zhenchang(Shanghai Tunnel Quality Inspection Co.,Ltd.,Shanghai 201111,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]上海隧道工程质量检测有限公司,上海201111 [2]福州大学土木工程学院,福建福州350108

出　　处：《水利与建筑工程学报》2021年第6期35-40,75,共7页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金资助(51678155)。

摘　　要：基于极限平衡拱理论,根据有效承载宽度对中夹岩柱的实际支承力提出修正,得到适用于深埋小净距隧道的围岩压力计算方法;同时以兴业快线北段隧道实例为依托,将理论计算结果与数值模拟、现场实测结果相互验证。修正计算方法所得小净距隧道群的竖向围岩压力呈现主洞大于辅洞,内侧大于外侧的分布规律。数值模拟所得深埋小净距隧道群的法向围岩压力,其最大值出现在内侧拱肩处,向着拱顶和边墙呈逐渐减小趋势,其分布形态与现场实测结果基本吻合。修正计算方法所得竖向围岩压力与数值模拟结果、现场实测结果也较为吻合,认为考虑中夹岩柱实际支承力的修正计算方法较符合工程实际,可为深埋小净距隧道设计提供一定的理论依据。The practical supporting force of middle rock pillar was revised according to its effective load width,and the modified calculation method for the ground pressure of deep buried neighborhood tunnels was proposed based on the limit equilibrium theory.The modified calculation method was then applied to the engineering practice of North Xingye Tunnels,and the calculation results were compared and validated with numerical simulation and field measurement.As far as the vertical ground pressure from modified calculation method was concerned,the main tunnel was greater than the auxiliary tunnel and the inner side was greater than the outer side.As far as the normal ground pressure from numerical simulation was concerned,the distribution pattern accorded with field measurement generally.The peak of normal ground pressure appeared at the spandrel and then decreased gradually to crown and sidewall.The vertical ground pressure from modified calculation method also agree with its counterpart from numerical simulation and field measurement.The modified calculation method,by considering the practical supporting force of middle rock pillar,might be more suitable in engineering practice and could provide some reference for the design of deep buried neighborhood tunnels.

关 键 词：小净距隧道 中夹岩柱 围岩压力计算 有效承载宽度 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]