CN215064152U

CN215064152U - Mountain tunnel portal blasting flyrock blocking device

Info

Publication number: CN215064152U
Application number: CN202120506265.4U
Authority: CN
Inventors: 邓群峰
Original assignee: CCCC Third Highway Engineering Co Ltd
Current assignee: CCCC Third Highway Engineering Co Ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-12-07
Anticipated expiration: 2031-03-10

Abstract

The utility model discloses a mountain tunnel portal blasting flying stone blocking device, which comprises a baffle plate covered at the blasting position of the mountain tunnel portal, wherein the top of the baffle plate is provided with a lifting rope; the baffle comprises a plurality of supporting assemblies which are arranged at intervals up and down, a blocking piece is arranged between two adjacent supporting assemblies up and down, and the blocking piece is plate-shaped and is used for blocking flying stones generated by blasting from flying out; the front end of the suspender is fixed in the mountain body, the rear end of the suspender is positioned on the surface of the mountain body, and the rear end of the suspender is provided with a hook-shaped part used for suspending a lifting rope so that the baffle covers the blasting part of the mountain tunnel portal; the utility model discloses a lifting rope covers the outside of baffle in mountain tunnel entrance to a cave blast department, and when the flyrock that the blasting produced outwards flew out, the baffle has blockked blasting flyrock whole get off, has reduced the harm of blasting flyrock to personnel, equipment and structures around the operation point.

Description

Mountain tunnel portal blasting flyrock blocking device

Technical Field

The utility model belongs to the technical field of tunnel engineering, concretely relates to mountain tunnel entrance to a cave blasting flying stone blocking device.

Background

The traditional drilling and blasting method is mostly adopted in mountain tunnel tunneling construction in China. The tunnel portal of the mountain tunnel is mostly positioned at the waist of a mountain, the rock is hard, the flying distance of blasting flying stones is relatively flat and farther due to the action of force and the influence of terrain in the blasting excavation process, and great safety threat is brought to personnel and structures around an operation point.

At present, when blasting and excavating are carried out on a mountain tunnel portal, blasting flystones are intercepted by covering a steel pipe bent with a bamboo fence. The method is easy to obtain materials and simple to implement, but individual flying stones are easy to fly out due to the fact that the height of the steel pipe bent is not enough, and serious damage is caused to personnel, equipment and structures around an operation point.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mountain tunnel entrance to a cave blasting flyrock blocking device to the blasting flyrock departure that produces when blockking tunnel entrance to a cave blasting excavation reduces the harm to personnel, equipment and structures around the operation point.

The utility model adopts the following technical scheme: a device for blocking blasting flying stones at a tunnel portal of a mountain tunnel comprises a baffle plate covering the blasting position of the tunnel portal of the mountain tunnel, wherein a lifting rope is arranged at the top of the baffle plate;

the baffle comprises a plurality of supporting assemblies which are arranged at intervals up and down, a blocking piece is arranged between two adjacent supporting assemblies up and down, and the blocking piece is plate-shaped and is used for blocking flying stones generated by blasting from flying out;

the hanging rod is fixedly arranged above the opening of the mountain tunnel, the front end of the hanging rod is fixed in the mountain body, the rear end of the hanging rod is located on the surface of the mountain body, and the rear end of the hanging rod is provided with a hook-shaped part used for hanging a hanging rope so that the baffle covers the blasting position of the opening of the mountain tunnel.

Further, a plurality of supporting components are all parallel to each other.

Further, every supporting component all includes preceding horizontal pole and the back horizontal pole that is parallel to each other, blocks that the piece is located between preceding horizontal pole and the back horizontal pole, and through connecting wire and preceding horizontal pole and back horizontal pole fixed connection.

Further, the barrier sheet is an elastic barrier sheet made of a soft material.

Furthermore, the lifting rope is fixed on a supporting component at the top of the baffle plate, and two ends of the lifting rope are respectively positioned at two sides of the supporting component.

Further, the distance between the two ends of the lifting rope and the center point of the top support assembly is equal.

And furthermore, stiffening ribs are arranged between the adjacent front cross bars and/or rear cross bars.

The utility model has the advantages that: the utility model discloses a lifting rope covers the baffle in the outside of mountain tunnel entrance to a cave blast department, and the baffle has buffering reaction force, and when the flyrock that the blasting produced outwards flew out, before the blasting flyrock had not come to and lifted mountain tunnel entrance to a cave blasting flyrock blocking device, the baffle has blockked blasting flyrock whole, has reduced the harm of blasting flyrock to personnel, equipment and structures around the operation point.

Drawings

Fig. 1 is a schematic view of the arrangement of the blasting flying stone blocking device for the mountain tunnel portal of the present invention;

fig. 2 is a schematic structural view of a device for stopping flying stones during blasting at the entrance of a mountain tunnel according to the present invention;

fig. 3 is a schematic side view of the blasting flying rock blocking device for mountain tunnel portal according to the present invention;

wherein, 1, a support component; 2. a blocking sheet; 3. a stiffening rib; 4. a lifting rope; 5. connecting wires; 6. a mountain body; 7. a boom; and 8, a baffle plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses a mountain tunnel portal blasting flying stone blocking device, as shown in figure 1, which comprises a baffle 8 covering the blasting part of the mountain tunnel portal, wherein the top of the baffle 8 is provided with a lifting rope 4; as shown in fig. 2, the baffle 8 includes a plurality of support assemblies 1 arranged at intervals up and down, a blocking piece 2 is arranged between two adjacent support assemblies 1 up and down, and the blocking piece 2 is plate-shaped and used for blocking flying stones generated by blasting from flying out; the device is characterized by further comprising a hanging rod 7 fixedly arranged above the opening of the mountain tunnel, the front end of the hanging rod 7 is fixed in the mountain body 6, the rear end of the hanging rod 7 is located on the surface of the mountain body 6, and the rear end of the hanging rod 7 is provided with a hook-shaped part used for hanging the hanging rope 4, so that the baffle 8 covers the blasting position of the opening of the mountain tunnel.

The utility model discloses in cover the baffle in the outside of mountain tunnel entrance to a cave blast department through lifting rope 4, the baffle has buffering reaction force, when the flyrock that the blasting produced outwards fly out, before the blasting flyrock has not yet come to reach mountain tunnel entrance to a cave blasting flyrock blocking device and has opened, the baffle has blockked blasting flyrock whole, has reduced the harm of blasting flyrock to personnel, equipment and structures around the operation point.

In this embodiment, as shown in fig. 3, each support assembly 1 includes a front cross bar and a rear cross bar parallel to each other, and the blocking piece 2 is disposed between the front cross bar and the rear cross bar and is fixedly connected with the front cross bar and the rear cross bar through a connecting wire 5. The front cross rod and the rear cross rod can be made of local materials, and steel pipes on a construction site are selected. More specifically, in this embodiment, the steel pipe is a diameter of 48 × 2.5 mm. The barrier sheet 2 can also be made of local materials, and is made of waste plastic plates or bamboo plates and the like; the steel tube can be used as a framework for supporting a plastic plate or a bamboo plate. The connecting wire 5 can be iron wire, steel wire or the like. The steel pipe is fixed on the waste plastic plate by the connecting wire 5 to process the baffle 8, thus the local materials are obtained and the wastes are utilized. The method has the advantages of easily-obtained materials, simple implementation, low cost of the used materials, easy obtainment, economy, high efficiency, safety and reliability.

In this embodiment, a plurality of supporting assemblies 1 are all parallel to each other, and the front cross bar and the rear cross bar of the supporting assemblies are parallel to each other, and the blocking piece 2 is vertically placed in the front cross bar and the rear cross bar which are parallel to each other, so that the stability of the blocking piece 8 can be ensured. When blocking the tunnel flyrock, the baffle 8 can ensure that the baffle 8 is not easy to deform, and the flyrock is blocked in the baffle 8.

In this embodiment, the blocking sheet 2 is an elastic blocking sheet made of soft material, and the elastic blocking sheet can be made of light and elastic material such as waste plastic board or bamboo board, etc. for blocking flying stones and absorbing impact force. Specifically, the blocking piece 2 may be composed of a plurality of single plates, or may be an integral single plate (in this case, the single plate may cover the entire excavation contour line of the tunnel portal). The size of the combined single plate or the size of the integrated single plate can completely cover the excavation contour line of the tunnel opening, so that the blasting flying stones are prevented from punching out of the baffle 8, and unnecessary damage to personnel, equipment and structures around the operation point is avoided.

In this embodiment, the lifting rope 4 is fixed to the support member 1 on top of the apron 8, and its both ends are located on both sides of the support member 1. Specifically, a rock drill is used for drilling a hole at the 50cm position of the highest point outside an excavation contour line of a tunnel portal, a 22 cm-diameter hooked mortar anchor rod (namely a suspender 7) is driven into stable basement rock of a mountain, one end of the mortar anchor rod extends into the basement rock of the mountain, the other end of the mortar anchor rod is exposed out of the mountain, and the rock-entering depth is not less than 50 cm; and (3) installing a mortar anchor rod with a hook and a diameter of 22cm in stable bedrock at the 50cm position of the highest point outside the excavation outline of the tunnel portal by using a loader or an excavator. The lifting rope 4 is made of steel wire ropes, the baffle 8 is hung at the exposed end of a mortar anchor rod reserved at the upper end of the tunnel portal to be blasted through the steel wire ropes, the steel wire ropes are used for hanging the flying stone stoppers, and the baffle 8 is used for unloading blasting impact force.

In this embodiment, the lifting rope 4 is installed at the center of the top support assembly 1, and the lifting rope 4 is installed at the center of the top end of the baffle plate 8 in order to ensure the stability and balance of the baffle plate 8 in the rock-flying stopping operation.

In this embodiment, a stiffener 3 is provided between adjacent front and/or rear crossbars. Specifically, in order to ensure that the baffle 8 has certain rigidity and is not easy to deform in the lifting process, round steel with the diameter of 16mm can be installed on the front cross rod to serve as the stiffening rib 3; round steel with the diameter of 16mm can be arranged on the rear cross rod as a stiffening rib; or round steel with the diameter of 16mm is arranged on the front cross rod and the rear cross rod to be used as a stiffening rib for reinforcing the baffle 8.

Claims

1. A mountainous tunnel portal blasting flyrock blocking device is characterized by comprising a baffle (8) covering a mountain tunnel portal blasting part, wherein a lifting rope (4) is arranged at the top of the baffle (8);

the baffle (8) comprises a plurality of supporting assemblies (1) which are arranged at intervals up and down, a blocking piece (2) is arranged between every two adjacent supporting assemblies (1), and the blocking piece (2) is plate-shaped and is used for blocking flying stones generated by blasting from flying out;

the tunnel hanging device is characterized by further comprising a hanging rod (7) fixedly arranged above the mountain tunnel portal, the front end of the hanging rod (7) is fixed in the mountain body (6), the rear end of the hanging rod (7) is located on the surface of the mountain body (6), and the rear end of the hanging rod (7) is provided with a hook-shaped portion used for hanging the lifting rope (4) so that the baffle (8) covers the blasting position of the mountain tunnel portal.

2. A mountain tunnel portal blasting flyrock barrier as claimed in claim 1, wherein a plurality of said support members (1) are parallel to each other.

3. The device as claimed in claim 2, wherein each of said supporting members (1) comprises a front cross bar and a rear cross bar parallel to each other, and said blocking piece (2) is disposed between said front cross bar and said rear cross bar and is fixedly connected to said front cross bar and said rear cross bar by a connecting wire (5).

4. The mountain tunnel portal blasting flyrock blocking device according to claim 3, wherein the blocking sheet (2) is an elastic blocking sheet made of soft material.

5. The device as claimed in any one of claims 2 to 4, wherein the lifting rope (4) is fixed to the supporting member (1) on top of the retaining plate (8), and two ends of the lifting rope are respectively located at two sides of the supporting member (1).

6. The blasting flyrock barrier of a mountain tunnel portal according to claim 5, wherein the distance between the two ends of the lifting rope (4) and the center point of the top support member (1) is equal.

7. The device for stopping blasting flyrock at the entrance of the mountain tunnel as claimed in claim 6, wherein a stiffener (3) is arranged between adjacent front cross bars and/or rear cross bars.