基坑开挖影响下邻近长江大桥双曲拱桥的安全性能评价  

SAFETY PERFORMANCE EVALUATION OF ADJACENT YANGTZE RIVER BRIDGE HYPERBOLIC ARCH BRIDGE UNDER THE INFLUENCE OF FOUNDATION PIT EXCAVATION

作　　者：陈玉良 李丹 杨明 童立元[2] 闫鑫[2] CHEN Yu-liang;LI Dan;YANG Ming;TONG Li-yuan;YAN Xin(Nanjing Public Construction Center,210019,Nanjing,China;School of Transportation,Southeast University,210096,Nanjing,China)

机构地区：[1]南京市公共工程建设中心,南京210019 [2]东南大学交通学院,南京210096

出　　处：《建筑技术》2023年第16期1982-1985,共4页Architecture Technology

摘　　要：通过两阶段模拟法对深大基坑开挖影响下的邻近南京长江大桥双曲拱桥进行了分步模拟计算。先通过有限差分软件计算基坑开挖对临近双曲拱桥基础的影响,求解最不利工况下的拱脚变形;再结合混凝土抗拉强度设计值计算4种工况下拱脚允许最大位移值,作为邻近基坑开挖影响下的双曲拱桥安全理论限值。The two-stage method was used to simulate the adjacent hyperbolic arch bridge under the influence of deep foundation pit excavation.The influence of foundation pit excavation on adjacent hyperbolic arch bridge foundation was calculated by finite difference software,and the arch foot deformation under the most unfavorable condition was solved.Combined with the design value of concrete tensile strength,the maximum allowable displacement value of arch foot under four working conditions was calculated as the theoretical limit value of safety of hyperbolic arch bridge under the influence of adjacent foundation pit excavation.

关 键 词：南京长江大桥 双曲拱桥 深基坑 数值模拟 安全评价 

分 类 号：TU744[建筑科学—建筑技术科学]