黄河冲积地层深基坑支护结构变形与受力特性分析

Deformation and Mechanical Characteristics Analysis of Deep Foundation Pit in Alluvial Stratum of Yellow River

文中以济南市黄河冲击地层深基坑工程为案例,研究了深基坑支护结构变形与内力在基坑开挖过程中的变化规律。结果表明,墙体最大水平位移出现在开挖深度附近,坑外土体蠕变将引起墙体附加变形;墙顶水平支撑受拉,其他各道支撑受压,各道支撑轴力随开挖深度增大而增大,水平支撑架设完成后,各道支撑轴力基本保持稳定。

Based on the example of a deep foundation pit project near the Yellow River in Jinan City,the deformation and internal force of the deep foundation pit support structure during excavation were studied in this paper.The research results indicate that the maximum horizontal displacement of the wall occurs near the excavation depth,and the creep of the soil outside the pit will cause additional deformation of the wall.The support at the top of the wall bears tension,while the other supports bear pressure.The axial force of each support increases with the depth of excavation.After the installation of all the horizontal supports,the axial force remains basically stable.