Monitoring and protecting device for broken dangerous rock at tunnel portal

Abstract

The utility model belongs to the technical field of existing railway tunnel portal dangerous rock monitoring, and particularly relates to a tunnel portal dangerous rock breaking monitoring and protecting device which is characterized by comprising a plurality of H-shaped steel arranged in a tunnel portal. The surface of each piece of H-shaped steel is covered by a protective net; a monitoring belt is further arranged on the surface of each piece of H-shaped steel; a monitoring element is arranged on the monitoring belt; and an on-off monitoring network is connected between every two monitoring belts. Dangerous edge and rockfall hazards can be prevented through a shed tunnel formed by the H-shaped steel and the protective net, and the operation safety of the existing railway is guaranteed; a plurality of monitoring elements and on-off monitoring nets are arranged on the surface of the H-shaped steel and between the H-shaped steel; the vibration condition can be monitored, and the distribution condition of the falling rocks after falling is judged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of monitoring protection devices, more specifically to a kind of tunnel portal dangerous rock fragmenting monitoring protection device, belong to existing railway tunnel portal dangerous rock monitoring technical field. BACKGROUND

[0002] Through many years of engineering practice and exploration, setting protective shed hole at existing railway tunnel portal is considered as effective method to deal with tunnel portal dangerous rock falling disease problem, and has been widely applied in recent years in the aspect of existing railway tunnel portal protection. At present, regarding the setting type of dangerous rock falling protective shed hole at railway tunnel portal, according to shed hole material, it can be roughly divided into three types of flexible steel shed hole, rigid steel shed hole and reinforced concrete shed hole, and their applicable conditions are different, which need to be selected according to actual engineering conditions. For existing line, considering its busy operation state, in order to reduce the influence of shed hole implementation on existing line operation, flexible or rigid steel shed hole which is easy to install and has less influence on existing line operation is often used.

[0003] Although setting steel shed hole at tunnel portal can play the function of dangerous rock falling protection, however, when dangerous rock falling disease problem actually occurs, the deformation size and deformation degree of shed hole caused by rock falling cannot be directly observed, the influence on existing line operation cannot be directly evaluated, and whether dangerous rock falling is on line, whether shed hole deformation invades limit to cause secondary disaster, etc. often need to be concluded by field measurement of maintenance personnel, which not only increases the workload and labor cost of maintenance protection personnel, but also cannot discover and handle dangerous rock falling disease problem in the first time, and there is still great safety hazard for existing railway operation. In order to reduce the workload of maintenance protection, reduce labor cost, improve the timeliness of discovery and handling of tunnel portal dangerous rock falling disease problem, it is urgent to provide a kind of dangerous rock falling protective steel shed hole at existing railway tunnel portal.

[0004] Therefore, further improvement is needed. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above technical deficiencies, and proposes a kind of tunnel portal dangerous rock fragmenting monitoring protection device, which prevents dangerous rock falling, timely monitors steel shed damage, efficiently judges steel shed damage position, and reduces later maintenance cost.

[0006] A kind of tunnel portal dangerous rock fragmenting monitoring protection device, comprising several H-shaped steels arranged in tunnel portal;The surface of each H-shaped steel is covered by protective net;Each H-shaped steel surface is further provided with monitoring belt;Monitoring element is arranged on the monitoring belt;On-off monitoring net is connected between each monitoring belt.

[0007] Further, the monitoring belt is a chain plate belt; the chain plate belt covers the outside of the protective net and is opposite to the H-shaped steel; a first screw hole is formed on the outer upper surface of each H-shaped steel; a second screw hole is formed on the chain plate belt opposite to the first screw hole.

[0008] Further, the first screw hole and the second screw hole are connected by a screw; the screw penetrates the aperture on the protective net.

[0009] Further, the monitoring element is a vibration sensor and a deformation sensor; the vibration sensor is arranged at the vault position of each chain plate belt; the deformation sensor is distributed at the vault to the maximum span of each chain plate belt.

[0010] Further, a mounting seat is welded on each chain plate belt opposite to the vibration sensor and the deformation sensor; a fixing hole is arranged on the side wall of the mounting seat opposite to the vibration sensor and the deformation sensor.

[0011] Further, the on-off monitoring net is a sensing optical fiber.

[0012] Further, a plurality of buckles are arranged on the side of each chain plate belt; the sensing optical fiber is embedded in the buckle and is arranged along the chain plate belt.

[0013] Further, the chain plate belt surface is further provided with a buckle; the sensing optical fiber is connected between each chain plate belt in the horizontal and vertical directions.

[0014] The utility model has the following beneficial effects: not only can the shed formed by the H-shaped steel and the protective net prevent the danger of rockfall and ensure the operation safety of the existing railway, but also a plurality of monitoring elements and on-off monitoring nets are arranged on the surface of the H-shaped steel and between the H-shaped steels; the vibration condition can be monitored and the distribution condition after the rockfall is judged; the main stress points of the shed can be monitored and the deformation condition of the shed is judged. The distribution condition, severity and the like of the rockfall are fed back in time. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the whole structure schematic view of the utility model.

[0016] Fig. 2 It is the side structure schematic view of the utility model.

[0017] Fig. 3 It is the structure schematic view of the monitoring belt.

[0018] In the drawing: 1 is H-shaped steel, 1-1 is first screw hole, 2 is protective net, 3 is chain plate belt, 3-1 is second screw hole, 4 is vibration sensor, 5 is deformation sensor, 6 is buckle, 7 is sensing optical fiber, 8 is mounting seat. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0020] Referring to Figs. 1-3 The embodiment of the present application discloses a tunnel portal dangerous rock falling monitoring and protecting device, which comprises a plurality of H-shaped steels 1 arranged in the tunnel portal; the surface of each H-shaped steel 1 is covered by a protective net 2; each H-shaped steel 1 is further provided with a monitoring belt; the monitoring belt is provided with a monitoring element; and the monitoring belts are connected by an on-off monitoring net.

[0021] Further, the monitoring belt is a chain plate belt 3; the chain plate belt 3 is arranged on the outer side of the protective net 2 and is in a relative position with the H-shaped steel 1; a first screw hole 1-1 is formed in each H-shaped steel 1; and a second screw hole 3-1 is formed in the chain plate belt 3 opposite to the first screw hole 1-1.

[0022] Further, the first screw hole 1-1 and the second screw hole 3-1 are connected by a screw; and the screw penetrates the aperture of the protective net 2.

[0023] Specifically, in the embodiment, since the chain plate belt 3 is a flexible structure with multiple sections, it can not only adapt to the arrangement of the H-shaped steel 1, but also can install the monitoring element by using the multiple chain plates. In the embodiment, the second screw hole 3-1 is formed in any multiple chain plates of the chain plate belt 3, and the first screw hole 1-1 is formed in the corresponding position of the H-shaped steel 1, so that the chain plate belt 3 can be installed on the H-shaped steel; at the same time, since the protective net has a large number of apertures, the screw tightening will not be hindered.

[0024] Further, the monitoring element is a vibration sensor 4 and a deformation sensor 5; the vibration sensor 4 is arranged at the vault position of each chain plate belt 3; and the deformation sensor 5 is distributed from the vault position to the maximum span of each chain plate belt 3.

[0025] Specifically, in the embodiment, the vibration sensor 4 is arranged at the vault position of each chain plate belt 3, that is, the position corresponding to the vault position of the H-shaped steel. This position is most likely to perceive the vibration generated by the hole body. The deformation sensor 5 is distributed from the vault position to the maximum span; in this range, since the steel is directly stressed by the hole body, the rockfall can be perceived at the first time.

[0026] Specifically, the distribution interval of the plurality of deformation sensors 5 from the vault position to the maximum span is 2-3 m.

[0027] Further, the mounting seat 8 is welded on each chain plate 3 opposite the vibration sensor 4 and the deformation sensor 5.

[0028] The vibration sensor 4 and the deformation sensor 5 are placed in the mounting seat, and then the screw is screwed from the outside of the mounting seat to the inside to be fixed.

[0029] Further, the on-off monitoring network is the sensing optical fiber 7.

[0030] Further, the side of each chain plate 3 is provided with a plurality of buckles 6, and the sensing optical fiber is embedded in the buckle 6 and arranged along the chain plate 3.

[0031] Further, the surface of the chain plate 3 is also provided with the buckle 6, and the sensing optical fiber is connected between each chain plate in the horizontal and vertical directions.

[0032] Specifically, the sensing optical fiber 7 is distributed along the direction of each chain plate 3 and also across each chain plate 3, forming an interlaced monitoring network; if the sensing optical fiber 7 is damaged to form an open circuit, an alarm signal can be generated.

[0033] After the vibration sensor 4, the deformation sensor 5 and the sensing optical fiber 7 are all assembled, the communication optical cable can be connected, and the background terminal can be monitored in real time.

[0034] The specific implementation mode of the above-mentioned utility model does not constitute a limitation on the protection scope of the utility model. Any various other corresponding changes and deformations made according to the technical concept of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A monitoring and protection device for rockfall at tunnel entrances, characterized in that: It comprises several H-shaped steels arranged in the tunnel entrance, the surface of each H-shaped steel is covered by a protective net, each H-shaped steel is further provided with a monitoring belt, the monitoring belt is provided with a monitoring element, and the monitoring belts are connected by an on-off monitoring net.

2. The tunnel entrance dangerous rockfall monitoring and protection device according to claim 1, characterized in that: The monitoring belt is a chain belt, the chain belt is arranged outside the protective net and opposite to the H-shaped steel, a first screw hole is arranged on the outer top of each H-shaped steel, and a second screw hole is arranged on the chain belt opposite to the first screw hole.

3. The monitoring and protecting device for the falling of dangerous rock at the tunnel entrance according to claim 2, characterized in that: The first screw hole and the second screw hole are connected by a screw, and the screw penetrates the aperture of the protective net.

4. The monitoring and protecting device for the falling of dangerous rock at the tunnel entrance according to claim 3, characterized in that: The monitoring element is a vibration sensor and a deformation sensor, the vibration sensor is arranged at the vault of each chain belt, and the deformation sensor is distributed from the vault to the maximum span of each chain belt.

5. The monitoring and protecting device for the falling of dangerous rock at the tunnel portal according to claim 4, characterized in that: An installation seat is welded on each chain belt opposite to the vibration sensor and the deformation sensor, and a fixing hole is arranged on the side wall of the installation seat opposite to the vibration sensor and the deformation sensor.

6. The monitoring and protecting device for the falling of dangerous rock at the tunnel portal according to claim 5, characterized in that: The on-off monitoring net is a sensing optical fiber.

7. The monitoring and protecting device for the falling of dangerous rock at the tunnel portal according to claim 6, characterized in that: The side of each chain belt is provided with several buckles, the sensing optical fiber is embedded in the buckle and arranged along the chain belt.

8. The monitoring and protecting device for the falling of dangerous rock at the tunnel entrance according to claim 7, characterized in that: The surface of the chain belt is further provided with a buckle, and the sensing optical fiber is connected between each chain belt in the horizontal and vertical directions.

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