Bottom-anchor-constrained tunnel lining structure

Abstract

The invention relates to a floor anchoring constraint tunnel lining structure, so as to effectively reduce vertical deformation of a base and enhance hydraulic pressure resistance and floating resistance of the lining structure. The floor anchoring constraint tunnel lining structure comprises a primary arch wall bracing structure, a secondary lining structure, a waterproof and drainage system and a central drainage channel, and the waterproof and drainage system is arranged between the primary arch wall bracing structure and the secondary lining structure. The secondary lining structure comprises a secondary arch wall lining and a floor, the floor is located on a base leveling course, and two ends of the floor are solidified with two ends of the secondary arch wall lining. Vertical constraint members are arranged in a base rock and soil layer under the floor transversely in a spaced manner as well as in the route extension direction in a spaced manner, the lower end of each vertical constraint member extends into a stable rock and soil layer, and the upper end of each vertical constrain member penetrates the base leveling course to be fixedly connected with the floor.

Description

technical field [0001] The invention relates to a tunnel lining structure, in particular to a lining structure capable of controlling the vertical deformation of a basement in a karst area where underground water develops. Background technique [0002] Since the beginning of the 21st century, my country's railway construction has developed rapidly, and more and more high-standard double-track railways with a speed of more than 200km per hour have been built. Especially in the southwest mountainous area, karst is developed, and the development of the line is subject to many factors such as large curve radius and complex topographic and geological conditions. Restricted by these factors, the scale of karst tunnels increased rapidly. Due to the complexity, diversity, and irregularity of karst and karst water development, the risks of building large karst tunnels, especially their operation, are getting higher and higher. [0003] In recent years, during the operation of Yiwan, ...

AI Technical Summary

Problems solved by technology

The biggest defect of the traditional drainage system is that the central ditch is set inside the tunnel structure, mainly to drain and drain the surrounding groundwater in the area of ​​the main arch wall, and the accumulated water below the inverted arch of the tunnel cannot be effectively drained

Especially in areas with close hydraulic connection of the foundation, in continuous rainfall or rainstorm weather, due to the sudden increase in the amount of groundwater, the traditional drainage system often cannot lead the drainage to the drainage ditch in the tunnel structure in time, resulting in a sharp rise in the groundwater level

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