Frame support arch tunnel lining structure

Abstract

The invention discloses a frame support arch tunnel lining structure. The side wall structure cracking damage due to insufficient drainage capacity when underground water increases dramatically in rainy and flood seasons is effectively avoided, the action of underground water on a tunnel lining bottom structure is reduced or even eliminated, and thus the damage risk of underground water to the lining structure in rainy and flood seasons is eliminated. The frame support arch tunnel lining structure comprises a primary arch wall supporting structure, a secondary lining structure body and a waterproofing and drainage system located between the primary arch wall supporting structure and the secondary lining structure body. The secondary lining structure body comprises an arch crown section, side wall sections and an inverted arch section. The side wall sections are side wall frame support structures and are used as bearing structures of the arch crown section. The inverted arch section is a tunnel bottom frame structure with an internal cavity. A bottom plate is laid on the top face of the tunnel bottom frame structure. An annular end opening of the waterproofing and drainage system is led to the internal cavity of the tunnel bottom frame structure.

Description

technical field [0001] The invention relates to a tunnel lining structure, in particular to a hard rock tunnel or a tunnel lining structure in a karst area 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 building long tunnels, especially the risk of operation, 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 sidewalls (gen...

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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