CAJ | 학술논문

由于城市对市政工程项目的需求与日俱增,市政工程项目中难免出现深基坑开挖施工,容易对城市既有沟槽管线造成附加应力,使既有项目产生拉裂等事故。结合工程实践,采用三维有限元方法,分析基坑开挖对坑底已建隧道的影响,包括数值分析的模型网格划分、模型力学参数及单元类型选择和开挖进程模拟及监测面设置。分析结果表明,处于坑底中心的隧道,其横截面在基坑开挖过程的最大直径改变发生在竖向与水平向,竖向伸长,水平向压缩。处于坑底靠近地连墙的隧道,绕垂直轴向在坑内旋转一定的角度。
유우성시대시정공정항목적수구여일구증,시정공정항목중난면출현심기갱개알시공,용역대성시기유구조관선조성부가응력,사기유항목산생랍렬등사고。결합공정실천,채용삼유유한원방법,분석기갱개알대갱저이건수도적영향,포괄수치분석적모형망격화분、모형역학삼수급단원류형선택화개알진정모의급감측면설치。분석결과표명,처우갱저중심적수도,기횡절면재기갱개알과정적최대직경개변발생재수향여수평향,수향신장,수평향압축。처우갱저고근지련장적수도,요수직축향재갱내선전일정적각도。
As the city of the increasing demand for public works projects,public works projects will inevitably lead to deep excavation,the trench lines of both the city is easy to cause additional stress,resulting in rupture of both the project and other accidents occur there.Built with a project practice,three-dimensional finite element method to analyze the Bottom of excavation of the tunnel has been built,including numerical analysis of model meshing,and mechanical parameters of the model unit type selection and surface excavation process modeling and monitoring set.The results show that,at the Bottom of the center tunnel,the cross-section of the excavation process of change in maximum diameter vertical and horizontal,vertical stretch,horizontal compression.Even the walls at the bottom of the pit near the tunnel,pit rotated around the vertical axis angle.