摘要
武汉地铁2号线南延线区间盾构隧道与光谷大道高架桥匝道桩基础施工距离小,为保证隧道顺利掘进和桩基安全,文中采用三维有限元法对其进行数值计算,模拟隧道开挖过程,求解隧道围岩和桩基应力分布和空间变形情况。计算结果显示,理想状态下隧道盾构掘进对邻近桩基的受力和变形影响小,盾构过程安全。同时,为防止意外情况发生,提出桩基加强、保护和预防措施。
The construction distance between the shield tunnel of Wuhan Metro Line 2 and the Guanggu Avenue viaduct is small. To ensure the safety of tunneling and the pile foundation, the numerical calculation is carried out by using three-dimensional finite element method to simulate the tunnel excavation process.The stress distribution and spatial deformation of the surrounding rock and pile foundation of the tunnel are solved.According to the calculation results, the shield tunneling under ideal conditions has little effect on the stress and deformation of the pile foundation, and the shield process is safe.In order to prevent accidents, pile foundation strengthening, protection and preventive measures are proposed.
作者
刘宇闻
LIU Yuwen(WISDRI Urban Construction Company, Wuhan 430077, China)
出处
《交通科技》
2019年第3期50-53,58,共5页
Transportation Science & Technology
关键词
桥梁桩基础
隧道盾构
近接施工
有限元
bridge pile foundation
shield-tunneling
proximity construction
finite element
