地下综合管廊下穿施工对珠江堤防安全影响及保护措施探讨

Study on the Influence of Underground Comprehensive Pipeline Corridor Underpass Construction on the Safety of Pearl River Embankment and Protection Measures

隧道及竖井在堤防安全影响距离内,确保堤岸的安全是拟建工程关键控制点。基于此,该文结合工程实例,从堤防安全控制标准、建立数值模型分析了开挖隧道及竖井施工及加固对堤防的影响,结果表明,隧道及竖井施工对堤防具有显著的水平卸荷作用,不可避免地引起堤防结构岩土体应力场和位移场的改变,引起堤防结构发生水平位移,但采用合理的加固措施,施工期间堤防的安全能够得到保证。研究成果可为工程设计和施工的改进提供参考,同时也可为类似工程提供借鉴。

The tunnel and shaft are within the embankment safety influence distance,and the safety impacts of the construction of the tunnel and shaft on the existing embankment is one of the critical points of this project.Therefore,according to the embankment safety control standards,a numerical model is established to analyze the influence of excavation tunnel and shaft construction and reinforcement on the embankment.The results show that the tunnel and shaft construction has obvious horizontal unloading effect on the dike,which inevitably causes the change of stress field and displacement field of the embankment structure and horizontal displacement of the embankment structure.However,with reasonable reinforcement measures,the safety of the embankment can be guaranteed during construction.The results of this paper offer practical guidance for improving engineering design and construction,and also provide valuable experience for reference in similar projects.