Frame type low-position draining system tunnel lining structure

Abstract

The invention relates to a frame type low-position draining system tunnel lining structure. The frame type low-position draining system tunnel lining structure comprises a primary arch wall support structure, a secondary arch wall lining structure and a base plate which are sequentially arranged in an arch wall range from outside to inside and a water preventing and draining system located between the primary arch wall support structure and the secondary arch wall lining structure, wherein a tunnel bottom frame structure formed by foundation beams, short columns and crossbeams is arranged below the base plate to serve as the transverse bearing structure of the secondary arch wall lining structure and the vertical bearing structure of the base plate. The lower end of the draining system is arranged in a longitudinal tunnel draining channel in the internal space of the tunnel bottom frame structure in an oriented manner. The frame type low-position draining system tunnel lining structure has the advantages that a traditional tunnel lining tunnel bottom structural form is modified, the stress form of the tunnel bottom structure is changed, the effect of underground water on the tunnel lining bottom structure is reduced even eliminated, draining outside the lining structure is achieved at the same time, and accordingly the safety of the tunnel lining structure during operation especially in rainy and flood seasons is guaranteed.

Description

Technical field [0001] The invention relates to a tunnel lining structure, in particular to a tunnel lining structure in a karst area where groundwater is greatly affected by seasons or groundwater is developed. Background technique [0002] Since the beginning of the 21st century, my country’s railway construction has developed rapidly. More and more high-standard double-track railways have been constructed at speeds of more than 200km per hour, especially in the southwest mountainous areas, where karst is developed, and the line extension is subject to large curve radius and complex terrain and geological conditions. Restricted by various factors, the scale of karst tunnels has increased rapidly. Due to the complexity, diversity and irregularity of the development of karst and karst water, the risk of building long karst tunnels, especially the operational risk, is getting higher and higher. [0003] In recent years, during the operation of high-speed railway tunnels such as Yiwa...

AI Technical Summary

Problems solved by technology

[0005] In extreme rainstorms or continuous rainfall weather, the amount of water entering the tunnel through the blind drainage pipe exceeds the design drainage capacity of the side ditch and the central ditch, resulting in water accumulation in the track bed; The drainage blind pipe is discharged in time, and the water pressure rises sharply, causing the inverted arch to bulge and even the side wall to crack; again, under the action of high water pressure, the waterproof measures at the construction joints of the inverted arch are destroyed, and groundwater enters the inverted arch and fills the gap and will fill the gap. lift up, thereby destroying the track bed structure

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