Anti-collapse reinforced supporting structure for expansive soil substrate layer tunnel

Abstract

The invention provides an anti-collapse reinforced supporting structure for an expansive soil substrate layer tunnel, and belongs to the field of tunnel disaster-prevention construction. The anti-collapse reinforced supporting structure comprises an expansive soil tunnel substrate layer, an outer layer support fixed-connection top arch frame plate, an inner layer support fixed-connection bottom arch frame plate, an outer ring arc-shaped section reinforced connection partition plate, an inner ring arc-shaped section reinforced connection partition plate, outer layer energy-dissipation and shockabsorption hose structures, outer layer hose built-in cavities, middle-layer energy-dissipation and shock absorption hose structures, middle layer hose built-in cavities, inner layer energy-dissipation and shock absorption hose structures, inner layer hose built-in cavities, a mixed filling layer, bearing bottom support stabilizing devices, a sealing plate and pre-supporting anchor parts, and theouter layer support fixed-connection top arch frame plate is arranged above the inner side of the expansive soil tunnel substrate layer. The anti-collapse reinforced supporting structure has the beneficial effects that the sufficient supporting strength and anti-seismic ability are realized, large deformation of the expansive soil substrate layer can be borne, anti-seismic supporting and shock effect eliminating effects are realized, the tunnel collapse danger can be controlled, and shock response is reduced.

Description

technical field [0001] The invention belongs to the field of tunnel disaster prevention construction, in particular to an expansive soil base layer tunnel anti-collapse strengthening support structure. Background technique [0002] Expansive soil is also called "swellable soil". A cohesive soil that expands violently after immersion in water and shrinks significantly after dehydration. Because the soil contains more clay minerals such as montmorillonite and illite, it is very hydrophilic. When the natural moisture content is high, the expansion amount and expansion force after immersion in water are small, while the shrinkage amount and shrinkage force after dehydration are large. When the natural pore ratio is larger, the expansion amount and expansion force are smaller, and the shrinkage The volume and contraction force are larger. When building a tunnel in expansive soil, due to the large expansibility of the soil after washing, when the traditional tunnel support devic...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned technical problems, the present invention provides an anti-collapse support structure for expansive soil matrix layer tunnels, which overcomes the risk of violent volume expansion after the substratum layer of expansive soil tunnels is soaked in water, which can easily cause tunnel collapse engineering accidents, and has sufficient support Strength and anti-seismic ability, can withstand large deformation of expansive soil matrix layer, play the role of anti-seismic support and eliminate vibration effect, can control the risk of tunnel collapse and reduce vibration response

Images