One-time forming sector excavation method for hyperboloidal cave depot dome

Abstract

The invention provides a one-time forming sector excavation method for a hyperboloidal cave depot dome. The one-time forming sector excavation method comprises the following steps that firstly, first-part excavation is conducted, wherein after entering the hyperboloidal dome from a pilot tunnel, excavation is conducted to the circle center position of a hyperboloidal dome look-up view along the radius of the dome; secondly, excavation from the second part to the Mth part is conducted, wherein M-1 sectors are excavated and expanded towards the two sides in sequence till excavation is conductedto the vertical plane where the first diameter is located; and thirdly, excavation from the (M+1)th part to the Nth part is conducted, wherein the circle center of the hyperboloid dome look-up view serves as the center, N-M sectors are excavated and expanded towards the two sides in sequence, M and N are natural numbers, and N is larger than M. The method is particularly suitable for double-hyperboloidal dome excavation construction, the construction efficiency is greatly improved, meanwhile, the construction risk is reduced, the construction progress is accelerated, the engineering investmentis reduced, and the economic benefits are obvious.

Description

technical field [0001] The invention belongs to the technical field of underground cavern excavation in tunnels and underground structures, and in particular relates to a fan-shaped excavation method for one-time forming of a hyperboloid cavern dome. Background technique [0002] At present, the use of underground space plays a huge role in the fields of politics, economy, national defense, and scientific research. China has developed rapidly in related fields due to its large demand for underground space and rich geological conditions. With the rapid changes in the natural environment and social environment, the development and utilization of underground space must not only have the function of economic construction, but also require the ability to reserve resources in extreme cases. With the continuous development of the development and utilization of underground space, the underground structure is more and more developed towards the long-span method. [0003] Due to the ...

AI Technical Summary

Problems solved by technology

The contour of the hyperboloid dome is relatively complex, and the horizontal boundary and vertical boundary are both curved surfaces. Conventional excavation methods can easily cause over- and under-excavation, which brings losses in construction period and cost to the project

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