CN207004542U - Loess tunnel pipe shed support structure - Google Patents

Abstract

The utility model discloses a tube shed support structure for a loess tunnel. The arch frame is composed of I-beams and prefabricated panels. The prefabricated panels are arranged along the longitudinal and circumferential directions of the tunnel and fixed by bolts. A prefabricated slab is connected between them, and a pipe shed arranged at an angle of 3-15° is inserted at the loess on the outer top of the arch along the longitudinal direction and the ring direction of the tunnel. The pipe shed is filled with cement mortar, and the diameter of the pipe shed is 70 ‑180mm, the wall thickness of the pipe shed is 4‑10mm, the pipe shed is composed of a long pipe shed and a short pipe shed, the length of the short pipe shed is 700‑1000m, and the length of the long pipe shed is greater than 10m. The pipe shed support structure of the loess tunnel of the utility model has good integrity, a single excavation length is long, and the area is large, which can effectively solve the problem of landslides caused by the deformation of the soil layer softened by water in the loess area, and effectively isolate the excavation process. mechanical vibration disturbance.

Description

Loess Tunnel Pipe Shed Supporting Structure

technical field

The utility model relates to the technical field of building structures, in particular to a loess tunnel pipe shed supporting structure.

Background technique

The collapsibility of loess is a special engineering geological property of loess. Loess has the property of rapid structural damage and sudden subsidence after being soaked by water under its own weight or external load. The collapsibility of loess is very harmful to human engineering activities, often causing damage to buildings, channels, and reservoir banks. Therefore, when building in collapsible loess areas, special attention should be paid to prevent water infiltration, so as to ensure the safety of tunnel construction and tunnel operation. In the prior art, the initial lining method of sprayed concrete with steel mesh hanging on the steel arch frame is generally used for initial support to ensure the construction safety during the construction process. The disadvantage of this support is that the support range is small and the strength is not enough. The excavation area is small, and when the concrete is sprayed with water, the loess absorbs the water in the concrete and tends to become unstable, causing problems such as landslides.

Utility model content

The purpose of this utility model is to provide a loess tunnel pipe shed support structure, which has good integrity, long single excavation length and large area, which can effectively solve the problem of landslides caused by deformation of the soil layer caused by water softening in the loess area. Effectively isolate mechanical vibration interference during excavation.

In order to achieve the above purpose, the utility model provides a loess tunnel pipe shed support structure, including an arch frame, the arch frame is composed of I-beams and prefabricated panels, and the prefabricated panels are arranged along the longitudinal and circumferential directions of the tunnel and fixed with bolts. A prefabricated panel is connected between every two adjacent I-beams, and a waterproof adhesive strip is provided between the prefabricated panel and the I-beam, and a waterproof adhesive strip is also provided between the adjacent two prefabricated panels. The loess at the top of the outer frame is inserted along the longitudinal direction and ring direction of the tunnel with a pipe shed arranged at an angle of 3-15°. The pipe shed is filled with cement mortar. The diameter of the pipe shed is 70-180mm, and the wall thickness of the pipe shed is 4 -10mm, the distance between two adjacent pipe sheds is 2-5 times the diameter of the pipe shed, the pipe shed is composed of a long pipe shed and a short pipe shed, the length of the short pipe shed is 700-1000m, and the length of the long pipe shed The length is greater than 10m, and a water diversion pipe is provided on the outer side of the upper part of the arch. The water diversion pipe passes through the arch and is connected to the water collection well in the tunnel through a pipe arranged along the inner wall of the tunnel.

Compared with the prior art, the beneficial effects of the loess tunnel pipe shed support structure of the present invention are as follows:

(1) The pipe shed support is used to match the arch frame composed of I-beam and prefabricated slabs, and waterproof rubber strips are used to stop water, so that the integrity is good, the length of a single excavation is long, and the area is large, which can effectively solve the problem of loess areas. Water softens the soil layer and causes landslides, and effectively isolates the mechanical vibration interference during the excavation process.

The utility model will become clearer through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the utility model.

Description of drawings

Figure 1 is a schematic diagram of the tube shed support structure of a loess tunnel.

detailed description

Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

Please refer to Fig. 1, the described loess tunnel pipe shed support structure includes an arch frame 1, the arch frame 1 is composed of I-beam 11 and prefabricated panels 12, and the prefabricated panels 12 are arranged longitudinally and circumferentially along the tunnel and fixed by bolts A prefabricated panel 12 is connected between every two adjacent I-beams 11, a waterproof rubber strip 13 is also provided between the prefabricated panel 12 and the I-beam 11, and a prefabricated panel 12 is also provided between two adjacent prefabricated panels 12. There is waterproof glue strip 13, is used for waterstop. At the loess on the outer top of the arch 1, a pipe shed 2 arranged at an angle of 3-15° is inserted along the longitudinal direction and the ring direction of the tunnel. The pipe shed 2 is filled with cement mortar. The diameter of the pipe shed 2 is 70-180mm. The wall thickness of the shed 2 is 4-10mm, and the distance between two adjacent pipe sheds 2 is 2-5 times the diameter of the pipe shed 2. The pipe shed 2 is composed of a long pipe shed and a short pipe shed. The length is 700-1000m, and the length of the long tube shed is greater than 10m. A water diversion pipe 3 is arranged on the outer side of the upper part of the arch 1, and the water diversion pipe 3 passes through the arch 1 and is connected to a water collecting well in the tunnel through a pipe 4 arranged along the inner wall of the tunnel.

The above-mentioned support structure has good integrity, which can make the single excavation length of the tunnel long and the area large, and can effectively solve the problem of landslides caused by deformation of the soil layer caused by water softening in the loess area, and effectively isolate the tunnel during the excavation process. Mechanical vibration interference.

The utility model has been described above in conjunction with the best embodiments, but the utility model is not limited to the above-disclosed embodiments, but should cover various modifications and equivalent combinations based on the essence of the utility model.

Claims (1)

1. A tube shed support structure for a loess tunnel, comprising an arch, characterized in that: said arch is made of I-beams and prefabricated panels, and the prefabricated panels are arranged longitudinally and circumferentially along the tunnel and fixed with bolts, each adjacent There is a prefabricated panel connected between the two I-beams, and there is also a waterproof adhesive strip between the prefabricated panel and the I-beam, and a waterproof adhesive strip is also provided between the two adjacent prefabricated panels. In the loess of the tunnel, a pipe shed arranged at an angle of 3-15° is inserted along the longitudinal direction and the ring direction of the tunnel. The pipe shed is filled with cement mortar. The diameter of the pipe shed is 70-180mm, and the wall thickness of the pipe shed is 4-10mm. The distance between two adjacent pipe sheds is 2-5 times the diameter of the pipe shed. The pipe shed is composed of a long pipe shed and a short pipe shed. The length of the short pipe shed is 700-1000m, and the length of the long pipe shed is greater than 10m. , a water diversion pipe is arranged on the outer side of the upper part of the arch, and the water diversion pipe passes through the arch and is connected to the water collection well in the tunnel through a pipe arranged along the inner wall of the tunnel.