Road over-crossing tunnel open cut tunnel structure

Abstract

The utility model discloses a road over-crossing tunnel open cut tunnel structure which comprises an arch protection mechanism and an open cut tunnel mechanism. The arch protection mechanism is arranged on the open cut tunnel mechanism, and a road is arranged on the open cut tunnel mechanism; the open cut tunnel mechanism comprises a tunnel body and a tunnel portal; the arch protection mechanism comprises an arch body, the tunnel portal is arranged at one end of the tunnel body, the arch body is arranged on the tunnel body, and the road is arranged on the arch body. The arch protection mechanism further comprises arch feet and anchor rods. The arch feet are arranged on the two sides of the lower end of the arch body. The anchor rods are connected with the arch feet. The utility model aims to overcome the defects in the prior art, and provides the open cut tunnel structure crossing the tunnel on the road, so that the passage of surrounding people and the operation safety of the tunnel are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of road tunnel open cut structure. BACKGROUND

[0002] When highway, railway is laid in mountainous area, it needs to set a large number of tunnels due to the influence of topography and existing ground buildings and needs to cross stratum.

[0003] When tunnel portal topography is relatively steep, there are dangerous rock or rockfall hazards on the slope, and the tunnel open cut needs to be lengthened. To ensure the safety of the portal before tunnel construction, the existing method is to directly block the existing road, which is not convenient for the surrounding people to pass through. There is an urgent need to retain the road without affecting the structural stability and post-operation safety of the tunnel. Therefore, a road tunnel open cut structure is proposed to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects of the prior art and providing a road tunnel open cut structure that ensures the safety of the surrounding people and the tunnel operation.

[0005] To achieve the above object, the utility model provides the following technical scheme: a road tunnel open cut structure, comprising an arch protection mechanism and an open cut mechanism; the arch protection mechanism is arranged on the open cut mechanism, and the open cut mechanism is provided with a road.

[0006] The open cut mechanism comprises a tunnel body and a tunnel portal; the arch protection mechanism comprises an arch body, the tunnel portal is arranged at one end of the tunnel body, the arch body is arranged on the tunnel body, and the road is arranged on the arch body.

[0007] Preferably, the arch protection mechanism further comprises arch feet and anchor rods; the arch feet are arranged on both sides of the lower end of the arch body; and the anchor rods are connected to the arch feet.

[0008] Preferably, the arch body is provided with a profile steel.

[0009] Preferably, the road comprises a road surface, a backfill layer, a road slope and a slope protection.

[0010] The backfill layer is arranged above the arch body, the road surface is arranged above the backfill layer, the slope protection is arranged on one side of the road surface, and the road slope is arranged on the other side of the road surface.

[0011] Preferably, the road surface is provided with a water interception ditch; and the backfill layer is provided with a drainage ditch.

[0012] Preferably, the slope protection comprises a plurality of mortar anchor rods and slope surface sprayed mortar; the plurality of mortar anchor rods are arranged on the slope surface, and the slope surface sprayed mortar is arranged between the plurality of mortar anchor rods.

[0013] Compared with the prior art, the road overpass tunnel open tunnel structure has the advantages that the arch protection mechanism is arranged on the tunnel body, the road is arranged on the arch protection mechanism, the crowd passing is not affected, the tunnel structure is uniformly stressed, the structure is safe and reliable, and the construction is convenient, and the passing of the surrounding crowd and the tunnel operation safety are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0015] Fig. 1 It is a front view of the road overpass tunnel open tunnel structure of the present application;

[0016] Fig. 2 It is a side view of the road overpass tunnel open tunnel structure of the present application.

[0017] In the drawing: 1, tunnel body; 2, tunnel portal; 3, arch body; 4, profile steel; 5, arch foot; 6, anchor rod; 7, lower excavation line; 8, upper excavation line; 9, backfill layer; 10, road surface; 11, water intercepting ditch; 12, drainage ditch; 13, slope protection; 14, road slope; 15, backfill line. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0019] Please refer to Figs. 1-2 A road overpass tunnel open tunnel structure, comprising an arch protection mechanism and an open tunnel mechanism; the arch protection mechanism is arranged on the open tunnel mechanism, and the open tunnel mechanism is arranged with a road; the open tunnel mechanism comprises a tunnel body 1 and a tunnel portal 2; the arch protection mechanism comprises an arch body 3, one end of the tunnel body 1 is provided with the tunnel portal 2, the tunnel body 1 is provided with the arch body 3, and the arch body 3 is provided with the road. The arch body 3 is provided with a profile steel 4.

[0020] Specifically, the tunnel body 1 is C35 reinforced concrete, the impermeability grade is greater than or equal to P10, and the thickness is 85 cm. The tunnel portal 2 is a hat brim bevel type, the slope is 1:1.25. The thickness of the arch body 3 is 2 m, the arch body 3 extends into the bedrock by 1 m, and C35 concrete is used. The profile steel 4 is I22a profile steel, which is arranged in the center of the arch body 3.

[0021] Specifically, the arch protection mechanism further comprises arch feet 5 and anchor rods 6; the arch feet 5 are arranged at the lower ends of the two sides of the arch body 3; the anchor rods 6 are connected to the arch feet 5. The arch feet 5 are arranged at the lower ends of the two sides of the arch body 3, have a width of 2.5 m and a height of 1 m, and are made of C35 reinforced concrete. The anchor rods 6 are mortar anchor rods with a diameter of 22 mm and a length of 5 m, and two are arranged at each cross section with a longitudinal spacing of 0.5 m.

[0022] Specifically, the slope rate of the lower excavation line 7 is 1:0.3, and the top elevation is located at the bottom of the arch feet 5. The slope rate of the upper excavation line 8 is 1:1, and the bottom elevation is located at the top of the arch feet.

[0023] Specifically, the road comprises a road surface 10, a backfill layer 9, a road slope 14 and a slope protection 13; the backfill layer 9 is arranged above the arch body 3, the road surface 10 is arranged above the backfill layer 9, the slope protection 13 is arranged on one side of the road surface 10, and the road slope 14 is arranged on the other side of the road surface 10. The road surface 10 is provided with a water intercepting ditch 11, and the backfill layer 9 is provided with a drainage ditch 12.

[0024] Specifically, the backfill layer 9 has a particle size of ≤30 cm and is compacted by layering and ramming, and the backfill thickness of each layer is not greater than 0.3 m. The backfill line 15 at the portal has a slope of 1:1.25, and the backfill height is higher than the top of the open tunnel by 2 m. The road surface 10 is made of C30 reinforced concrete with a thickness of 20 cm and uses a steel mesh sheet with a diameter of 12 mm and a spacing of 20 cm. The water intercepting ditch 11 is arranged on the slope side of the road surface 10, has a rectangular shape, a depth of 60 cm and a width of 50 cm. The drainage ditch 12 is 1 m away from the road slope foot, has an inverted trapezoidal shape, a depth of 50 cm, a lower opening width of 30 cm and an upper opening width of 60 cm.

[0025] Specifically, the slope protection 13 comprises a plurality of mortar anchor rods and slope surface sprayed mortar, the plurality of mortar anchor rods are arranged on the slope surface, and the slope surface sprayed mortar is arranged between the plurality of mortar anchor rods. The mortar anchor rods are made of mortar anchor rods with a diameter of 22 mm and a length of 3 m, are arranged in a plum blossom shape with a spacing of 1.5 m×1.5 m, and the slope surface sprayed mortar is made of C20 net sprayed concrete with a thickness of 8 cm, a steel mesh with a diameter of 8 mm and a grid of 25 cm×25 cm. The road slope 14 has a slope rate of 1:1.5 and uses hydraulic spray seeding to plant grass.

[0026] The road overpass tunnel open tunnel structure, by setting the arch protection mechanism on the tunnel body 1, setting the road on the arch protection mechanism, does not affect the public traffic, the tunnel structure is uniformly stressed, the structure is safe and reliable, the construction is convenient, and the safety of the surrounding public traffic and the tunnel operation is ensured.

[0027] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A road overpass tunnel cavern structure, characterized by, The application relates to a tunnel structure, which comprises an arch protection mechanism and a tunnel mechanism; the arch protection mechanism is arranged on the tunnel mechanism, and a road is arranged on the tunnel mechanism. The tunnel mechanism comprises a tunnel body (1) and a tunnel door (2); the tunnel body (1) is provided with the tunnel door (2) at one end; the tunnel body (1) is provided with an arch body (3); and the arch body (3) is provided with the road.

2. The at-grade crossing tunnel cavern structure according to claim 1, wherein, The arch protection mechanism further comprises arch feet (5) and anchor rods (6); the arch feet (5) are arranged on both sides of the lower end of the arch body (3); and the anchor rods (6) are connected to the arch feet (5).

3. The at-grade crossing tunnel cavern structure according to claim 1, wherein, The arch body (3) is provided with a profile steel (4).

4. The at-grade crossing tunnel cavern structure according to claim 1, wherein, The road comprises a road surface (10), a backfill layer (9), a road slope (14) and a slope protection (13). The backfill layer (9) is arranged above the arch body (3); the road surface (10) is arranged above the backfill layer (9); the road surface (10) is provided with the slope protection (13) on one side and the road slope (14) on the other side.

5. The at-grade crossing tunnel cavern structure according to claim 4, wherein, The road surface (10) is provided with a water intercepting ditch (11); and a drainage ditch (12) is arranged on the backfill layer (9).

6. The at-grade crossing tunnel cavern structure according to claim 4, wherein, The slope protection (13) comprises a plurality of mortar anchor rods and slope surface sprayed mortar; the plurality of mortar anchor rods are arranged on a slope surface; and the slope surface sprayed mortar is arranged between the plurality of mortar anchor rods.

Images