邻近堆载引起既有隧道变形响应分析
田栋梁1,2徐兴3王伊丽4杜明芳1裴增增5施展斌6易领兵7李俊昊8
Analysis of the Deformation Response of Existing Tunnels Induced by Adjacent Surcharge Load
TIAN Dongliang1,2XU Xing3WANG Yili4DU Mingfang1PEI Zengzeng5SHI Zhanbin6YI Lingbing7LI Junhao8
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作者信息:1.河南工业大学土木工程学院, 450001， 郑州
2.青岛理工大学土木工程学院, 266520， 青岛
3.杭州浙大福世德勘测设计有限公司, 310058， 杭州
4.浙江同济科技职业学院艺术设计学院, 310058， 杭州
5.中建八局轨道交通建设有限公司, 210046， 南京
6.浙江大学建筑工程学院, 310058， 杭州
7.中国交通建设股份有限公司轨道交通分公司, 100088， 北京
8.中国建筑第七工程局有限公司, 450001， 郑州
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Affiliation:1.College of Civil Engineering，Henan University of Technology，450001，Zhengzhou，China
2.School of Civil Engineering, Qingdao University of Technology, 266520, Qingdao, China
3.Hangzhou Zhejiang University First Investigation and Design Co., Ltd.，310058，Hangzhou，China
4.School of Arts Design，Zhejiang Tongji Vocational College of Science and Technology，310058，Hangzhou，China
5.China Construction Eight Bureau Rail Transit Construction Co., Ltd.，210046，Nanjing，China
6.College of Civil Engineering and Architecture, Zhejiang University，310058，Hangzhou，China
7.China Transportation Construction Co., Ltd.,Rail Transit Branch，100088，Beijing，China
8.China Construction Seventh Engineering Bureau Co.,Ltd.,450001，Zhengzhou，China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.05.009
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中图分类号/CLCN:U231.3； U455.43
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栏目/Col:土建工程
摘要:
［目的］堆载易造成周边土体产生沉降变形，并可能进一步威胁到下卧既有隧道的安全，但关于此方面的理论大多停留在隧道的力学平衡方面，忽略了隧道变形中隧道系统的能量变化。因此，有必要从能量角度出发，通过理论计算获得邻近堆载对既有隧道受力变形响应的理论解析解。［方法］介绍了隧道变形理论；采用Boussinesq解获得邻近堆载引起既有隧道轴线处的附加荷载，并基于双参数Vlasov地基模型建立隧道在堆载作用下的能量方程；采用能量变分理论，获得既有隧道的受力变形响应。［结果及结论］将所提计算方法与既有文献中的工程案例实测数据进行比较，验证了所提计算方法的准确性；与Winkler地基模型计算结果相比，所提计算方法的计算结果更贴近实测数据。参数研究结果表明：隧道与堆载中心间距的增大会引起隧道纵向位移及内力的减小；堆载荷载和隧道直径的增大会导致隧道在堆载作用下的隧道受力变形及弯矩有所增大；增大土体弹性模量能够有效减少邻近堆载对既有隧道的影响。
Abstracts:
［Objective］Surcharge load easily causes settlement and deformation of the surrounding soil, which may further threaten the safety of the underlying existing tunnel. However, most of the theories in this regard mainly focus on the mechanical equilibrium of the tunnel, neglecting the energy changes in the tunnel system during tunnel deformation. Therefore, it is necessary to start from the perspective of energy, and obtain the theoretical analytical solution to the stress and deformation response of the existing tunnel under adjacent surcharge load through theoretical calculations.［Method］The tunnel deformation theory is introduced. The Boussinesq solution is used to obtain the additional load at the axis of the existing tunnel caused by adjacent surcharge load, and an energy equation of the tunnel under surcharge load is established based on the two-parameter Vlasov foundation model. The stress and deformation response of the existing tunnel is obtained by using the energy variational theory.［Result & Conclusion］The proposed calculation method is compared with the measured data of engineering cases in existing literature, verifying the accuracy of the proposed calculation method. Compared with the calculation results of the Winkler foundation model, the calculation results of the proposed method are closer to the measured data. The results of parameter studies show that an increase in the distance between the tunnel and the center of the surcharge load will cause a decrease in the longitudinal displacement and internal forces of the tunnel; an increase in the surcharge load and the tunnel diameter will lead to an increase in the stress, deformation and bending moment of the tunnel under surcharge load; increasing the elastic modulus of the soil can effectively reduce the impact of adjacent surcharge load on the existing tunnel.
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