Separated maintainable tunnel lining structure

Abstract

The invention provides a separated maintainable tunnel lining structure to effectively avoid the phenomenon that a side wall structure is fractured and damaged due to the fact that underground water soars in rain-flood seasons but the discharge capacity is insufficient, improve the hydraulic pressure and floating resistant capacity of the lining structure and reduce the damage risks of underground water in rain-flood seasons to the lining structure, especially a tunnel bottom structure. The separated maintainable tunnel lining structure comprises an arch wall primary supporting structure, a water prevention and discharge system and a lining structure body which are arranged from outside to inside. The lining structure body comprises a secondary arch lining, a side wall frame supporting structure, a filling wall and a tunnel bottom pile-plate structure. The tunnel bottom pile-plate structure comprises a base plate laid on a base confining bed and anchorage piles longitudinally and transversely arranged along a tunnel at intervals. The upper ends of the anchorage piles are fixedly connected with the base plate. The two circumferential ends of the water prevention and discharge system lead to longitudinal drainage ditches formed in the two transverse sides of the base plate.

Description

technical field [0001] The invention relates to a tunnel lining structure, in particular to a separate repairable tunnel lining structure used in hard rock tunnels or karst areas where groundwater develops. Background technique [0002] In the 21st century, with the rapid development of my country's railway construction, more and more high-standard double-track railways with a speed of more than 200km per hour have been built, especially in the western mountainous areas. Due to the constraints of the tunnel, the length and scale of the tunnel increased rapidly. Especially in karst areas, due to the complexity, diversity and irregularity of karst and groundwater development, the risk of water damage in the operation of long tunnels is getting higher and higher. [0003] In recent years, during the operation of Yiwan, Shanghai-Kunming, Guiguang and other high-speed railway tunnels, several ballastless ballast bed deformations, inverted arches and filling uplifts, and lining si...

AI Technical Summary

Problems solved by technology

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

Thirdly, the circular drainage blind pipes of the traditional drainage system are installed at intervals of about 10m along the longitudinal direction. Due to various reasons, the drainage blind pipes may be blocked in some areas. uplift, sidewall cracking

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