复杂地质环境中隧道修建仰拱病害处治临时支撑新技术研究  

Study on new structure of temporary support for treatment of tunnel invert disease in complex geological environment

作　　者：刘鹏[1] LIU Peng(CCCC First Highway Consultants Co.,Ltd.,Shaanxi Xi'an 710075 China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075

出　　处：《山东交通科技》2023年第4期100-104,共5页

摘　　要：隧道穿越复杂地层区域,受不良地质构造影响,结构受力复杂且难以预测。由于公路隧道多为扁平状,仰拱矢跨比较小,仰拱成为病害发生的一个重点区域。为减少仰拱病害,拟研究一种可用于二衬及仰拱结构的临时支撑。通过结构验算结果可知:当以水平构造应力为主且仰拱承受主动形变压力时,路面隧道中线部位、两侧路面与水沟的连接部位为危险区域。使用临时支撑可改善结构的受力性能,结构安全系数不同程度提升,可起到加固作用。The tunnel passes through a complex stratum area,which is affected by unfavorable geological structure,and the structural stress is complex and difficult to predict.As most highway tunnels are flat,and the rise span ratio of inverted arch is small,the inverted arch has become a key area of disease.In order to reduce the disease of inverted arch,it is proposed to study a temporary support that can be used for secondary lining and inverted arch structure.It can be seen from the checking calculation of structure that when the horizontal tectonic stress is dominant and the inverted arch bears the active deformation pressure,the road center line of the tunnel,and the connection between the road surface on both sides and the ditch is a dangerous area.The use of temporary supports can improve the mechanical performance of the structure,and the structural safety factor can be improved to varying degrees,which can play a role in strengthening.

关 键 词：隧道工程 病害处治 断层破碎带 临时支撑 数值模拟 仰拱 

分 类 号：U455[建筑科学—桥梁与隧道工程]