不同工法对高边墙超大断面地下硐室结构变形及应力响应分析

Analysis of Structural Deformation and Stress Response of Underground Chamber With High Side Wall and Large Section by Different Construction Methods

为了分析不同条件下高边墙超大断面地下硼室结构变形及应力响应,文中建立了施工过程中高边墙超大断面地下碉室结构模型,分析了不同围岩等级下6种工法下高边墙超大断面地下碉室结构的应力及变形。结果表明,随着施工步数的不断增加,所有工法下拱顶的沉降量及隆起量均表现为先快速增加后稳定的变化规律,这为高边墙超大断面地下室结构的施工方案优化奠定了基础。

In order to analyze the structural deformation and stress response of large section underground chamber with high side walls under different conditions,the paper establishes the structural model of large section underground chamber with high side walls during construction,and analyzes the stress and deformation analysis of large section underground chamber structure with high side walls under 6 construction meth-ods under different surrounding rock grades.The results show that with the increasing of the number of construction steps,the settlement and uplift of the vault under all construction methods increase rapidly at first and then change steadily.It lays a foundation for the optimization of the construction scheme of the underground chamber structure with high side wall and large section.