滨海地区超大直径盾构隧道穿越对邻近桥梁的影响  

Impact of Ultra⁃large Diameter Shield Tunnel Crossing on Adjacent Bridges in Coastal Region

作　　者：许岩[1] 黎莉 林嘉伟 何志倩 尚国军 XU Yan;LI Li;LIN Jiawei;HE Zhiqian;SHANG Guojun(Shenzhen Transportation Utility Construction Center,Shenzhen,Guangdong 518040,China;Shenzhen Urban Public Safety Technology Research Institute Co.,Ltd.,Shenzhen,Guangdong 518000,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]深圳市交通公用设施建设中心,广东深圳518040 [2]深圳市城市公共安全技术研究院有限公司,广东深圳518000 [3]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《施工技术（中英文）》2023年第21期41-47,共7页Construction Technology

基　　金：国家自然科学基金(51878569)。

摘　　要：滨海地区地质条件复杂,超大直径盾构工程近距离侧穿对桥梁桩基的影响不可忽略。对深圳望海路快速化改造工程超大直径盾构近距离穿越对深圳湾大桥深圳侧匝道桥的影响以及预加固措施的合理性进行分析。根据匝道桥现状资料建立隧-土-桩相互作用力学模型,分析隧道开挖引起的既有桩基承载力、沉降及水平位移变化。通过对预加固前后匝道桥在盾构穿越扰动影响下的下部桥墩及桩基础的计算,分析穿越对匝道桥的影响以及预加固措施的有效性。The geological conditions in the coastal area are complex.And the influence of the ultra⁃large diameter shield project on the bridge pile foundation cannot be ignored.The influence of super⁃large diameter shield tunneling on the Shenzhen side ramp bridge of the Shenzhen Bay Bridge and the rationality of pre⁃reinforcement measures are analyzed.Based on the current data of the ramp bridge,a mechanical model of tunnel⁃soil⁃pile interaction was established to analyze the bearing capacity,settlement and horizontal displacement of the existing pile foundation caused by tunnel excavation.The influence of crossing on the ramp bridge and the effectiveness of pre⁃reinforcement measures are analyzed through the calculation results of pile foundation displacement,settlement and other parameters of the ramp bridge before and after pre⁃reinforcement under the influence of shield crossing disturbance.

关 键 词：隧道 盾构 滨海地区 近距离穿越 数值模拟 位移场 变形 

分 类 号：U455[建筑科学—桥梁与隧道工程]