复杂地形黄土斜井稳定性分析及施工优化

Stability analysis and construction optimization of loess inclined shaft in complex terrain

为了研究复杂地形黄土斜井开挖数值模型,分析开挖前后坡体稳定性和斜井结构安全性,优化设计施工方案,采用有限元强度折减法分析坡体稳定性,通过对比不同开挖方式下斜井的变形特点和应力分布规律,提出斜井开挖及支护优化方案。研究表明,根据实际地形采有限元方法模拟开挖过程、采用强度折减法分析坡体稳定性,不需要简化地形,可实现斜井开挖工况模拟和安全分析,对斜井设计和施工具有积极的指导作用。(图6,表1,参6)

In order to study the excavation numerical model of loess inclined shaft in complex terrains, analyze the slope stability and structure security of inclined shaft before and after excavation, and optimize construction scheme, strength reduction finite element method is used to analyze the slope stability, prioritization schemes of excavation and support of inclined shaft are optimized through comparing the deformation characteristics and stress distribution law of different excavation methods. The study shows that the excavation simulation and safety analysis can be realized by simulating the excavation process with finite element method based on actual terrain and analyzing slope stability by strength reduction method without simplifying the terrain, which is instructive to the design and construction of inclined shafts.