地下工程平衡稳定理论再研究

Restudy on Equilibrium and Stability Theory of Underground Engineering

目前,地下工程结构在计算分析方面主要采用传统松弛荷载理论(类似荷载结构法)和数值分析法;在合理结构构造、施工工法等方面主要采用岩承理论(类似地层结构法),这些已有理论或方法隐含"变形协调控制"假定,实际应用中往往将这些假定忽视,因而需进一步发展新的理论方法以适应实际应用的需求。在大量工程实践和试验的基础上,揭示地下工程有效承载结构层与围岩荷载转移规律之间的关联性,建立地下工程平衡稳定理论,此理论既能反映传统"松弛荷载理论"和现代"岩承理论"的基本内容,又能拓宽平衡稳定性等内容,是地下工程平衡稳定性的新认识、新理念;同时提出能量控制技术、预支护技术、受力独立性综合技术、变形协调控制技术4项关键技术。将这些技术合理地运用到实际工程施工中,将便于利用已有或新成果分类预防和控制地下工程质量和安全,为解决新型地下工程问题提供新的依据。

At present, the traditional loosen load theory(resemble load-structure method) and numerical analysis method have been widely adopted in the calculation and analysis of the underground structure. In terms of structure construction and construction technology, the modern bearing capacity theory of surrounding rock(resemble layer-structure method) is mainly used. However, the hypothesis of deformation coordinated control implied in these theories and methods has been regularly ignored in practical applications. Therefore, it is necessary to further develop new theories and methods to meet the needs of practical application. Based on a large number of engineering practices and experiments, the correlation between the effective bearing structure layer of underground engineering and the law of load transfer of surrounding rock is revealed, and the equilibrium and stability theory of underground engineering is established. The theory can reflect the traditional loosen load theory and modern bearing capacity theory and can widen the equilibrium and stability. In addition, four key technologies, i.e. the energy control technology, the pre-supporting technology, the comprehensive technology of independent stress, and the deformation coordinated control technology. The rational application of these technologies will facilitate the classification prevention and control of engineering risks by means of the existing or new achievements, which can provide a new basis for solving the new underground engineering problems.