A trestle bridge usable for rock drilling

Abstract

The utility model discloses a trestle bridge can be used for rock drilling construction, including main bridge and rock drilling trolley, and the front end of main bridge is equipped with the front approach bridge of longitudinal removal and is used for driving the lifting mechanism of rock drilling trolley to lift, and the lifting mechanism is detachably connected with rock drilling trolley, and is equipped with rock drilling mechanism on rock drilling trolley. Its excavation method, S1, the front end of front approach bridge is overlapped on the step to be excavated, and rock drilling trolley is located below front approach bridge, and rock drilling mechanism carries out blasthole rock drilling, S2, after all blastholes complete rock drilling, the front approach bridge retreats and gives the space of ascending, and the lifting mechanism is connected with rock drilling trolley, then drives rock drilling trolley to ascend, S3, the front approach bridge moves forward and makes the front end to reoverlap on the step to be excavated, and the lifting mechanism lowers rock drilling trolley to the front approach bridge, and rock drilling trolley retreats to main bridge after passing through front approach bridge, then the front approach bridge retreats to main bridge, S4, charges and blast in blasthole. The utility model discloses can give both rock drilling and vehicle traffic to take out the residue, and it is favorable to improve construction efficiency, and safety is good.

Description

Technical Field

[0001] This utility model relates to the field of tunnel engineering machinery technology, and in particular to a trestle bridge that can be used for rock drilling construction. Background Technology

[0002] During tunnel construction using the bench method, the invert needs to be constructed promptly to ensure structural stability and the formation of a closed pressure ring. Before constructing the invert, excavation of the soil and rock at the invert location is necessary. Currently, this excavation commonly employs the drill-and-blast method, which involves drilling a specific arrangement of blast holes on the invert working face, followed by a series of procedures including charging, blasting, and debris removal. Similarly, when the design requires the laying of deep-buried water trenches within the tunnel, the excavation of these trenches also faces similar drill-and-blast requirements. Currently, the main methods for drilling blast holes for tunnel inverts and deep-buried water trenches are as follows: 1. Manual Handheld Drilling: This is the most traditional and common method. Workers stand on uncleaned or partially cleared rock piles and operate heavy handheld pneumatic or hydraulic rock drills. This method presents serious safety hazards: the working environment is harsh, the site is uneven, and the rock debris is slippery, easily causing personnel to slip, fall, or suffer mechanical injuries. Simultaneously, the dust and noise generated during drilling pose significant health risks to operators. Furthermore, this method is inefficient, requires a large workforce, is labor-intensive, and makes it difficult to guarantee drilling accuracy (mainly including hole depth and direction), affecting subsequent blasting effects and excavation profile quality. It has become one of the key bottlenecks restricting the efficiency of tunnel excavation cycle operations.

[0003] 2. Utilization of large rock drilling rigs: While fully hydraulic rock drilling rigs are highly efficient and safe for drilling at the tunnel face, their large size and complex structure present significant operational blind spots and flexibility limitations when used for drilling invert sections, as the rock and soil at the bottom of the tunnel cross-section are located in the invert area. The rig's boom cannot effectively cover areas near the initial support section or tunnel corners, and a large amount of backfilled and compacted soil is typically required to provide a stable support platform for the rig, a time-consuming and labor-intensive process. After drilling, the backfilled soil must be excavated again, resulting in repetitive work and resource waste. Furthermore, when using rock drilling rigs for invert drilling or deep-buried trench drilling, the front face cannot be cleared for muck removal, severely slowing down the construction progress.

[0004] 3. Temporary scaffolding platform operation: Some construction companies choose to erect steel pipe scaffolding platforms to provide working surfaces for personnel and drilling rigs. However, erecting and dismantling scaffolding itself requires a significant investment of manpower and time, resulting in low efficiency. Furthermore, the stability and safety of temporary scaffolding platforms cannot be guaranteed, and they are prone to instability when subjected to the strong impacts and vibrations of drilling rigs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a trestle bridge that can take into account both rock drilling and vehicle passage and muck removal, which is conducive to improving construction efficiency and safety.

[0006] This utility model further provides an excavation method using the aforementioned trestle bridge.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A trestle bridge for rock drilling includes a main bridge and a rock drilling trolley. The front end of the main bridge is provided with a longitudinally movable front approach bridge and a lifting mechanism for driving the rock drilling trolley to rise and fall. The lifting mechanism is detachably connected to the rock drilling trolley, and the rock drilling trolley is provided with a rock drilling mechanism.

[0008] As a further improvement to the above technical solution: the rock drilling trolley is equipped with a walking mechanism and rock drilling telescopic outriggers.

[0009] As a further improvement to the above technical solution: the bottom of the rock drilling telescopic outrigger is connected to a support pad via a ball joint.

[0010] As a further improvement to the above technical solution: the rock drilling trolley is equipped with a swing arm that can swing laterally, and the rock drilling mechanism is located on the swing arm.

[0011] As a further improvement to the above technical solution: the main bridge is provided with a passageway for vehicles to pass through, the lifting mechanism includes a gantry on the side of the passageway, a lifting component on the gantry and a hook connected to the lifting component, and the rock drilling trolley is provided with a hanging part for detachably connecting to the hook.

[0012] As a further improvement to the above technical solution: the main bridge includes two rows of longitudinal beams and a crossbeam disposed between the two rows of longitudinal beams, the passage is disposed on the crossbeam, and the hanger is disposed on at least one row of longitudinal beams.

[0013] As a further improvement to the above technical solution: the main bridge includes two rows of longitudinal beams, the passage is located on the top of the longitudinal beams, and the hanger is located on the outside of at least one row of the longitudinal beams.

[0014] As a further improvement to the above technical solution: the lifting component is a winch, and the winch is connected to the hook via a wire rope; And / or, the main bridge is provided with a support wheel assembly to support the front approach bridge.

[0015] An excavation method, employing the aforementioned trestle bridge suitable for rock drilling, includes the following steps: S1. The front end of the approach bridge is attached to the step to be excavated, the rock drilling trolley is located below the approach bridge, and the rock drilling mechanism performs blasting. S2. After all the blast holes have been drilled, the front approach bridge moves back to make room for the rise. The lifting mechanism is connected to the rock drilling trolley, and then the rock drilling trolley is raised. S3. The front approach bridge moves forward so that the front end re-attaches to the step to be excavated. The lifting mechanism lowers the rock drilling trolley to the front approach bridge. The rock drilling trolley moves back to the main bridge after passing the front approach bridge. Then the front approach bridge moves back to the main bridge. S4. Blasting with explosives inside the blast hole.

[0016] As a further improvement to the above technical solution: It also includes the following steps: S5. The front approach bridge moves forward so that the front end re-attaches to the step to be excavated. The rock drilling trolley moves forward through the front approach bridge to the bottom of the lifting mechanism. The lifting mechanism connects with the rock drilling trolley and then drives the rock drilling trolley to rise and separate from the front approach bridge. S6. The front approach bridge moves backward to make room for descent. The lifting mechanism lowers the rock drilling trolley onto the excavation surface. Then, the front approach bridge moves forward so that the front end re-attaches to the step to be excavated.

[0017] Compared with the prior art, the advantages of this utility model are: This utility model discloses a trestle bridge for rock drilling operations. During operation, a rock-drilling trolley equipped with a rock-drilling mechanism independently drills blast holes on the excavation face. The front approach bridge of the trestle bridge overlaps the step to be excavated, allowing clearing vehicles or other construction equipment to pass normally without interference, thus improving construction efficiency. After all blast holes in a construction section have been drilled, when blasting is to be carried out, the longitudinal movement of the front approach bridge, in conjunction with the lifting mechanism, drives the rock-drilling trolley to move up and down, allowing the trolley to retreat to a safe area. Simultaneously, the front approach bridge itself can also retreat to a safe area, thereby avoiding damage caused by debris generated during blasting, resulting in good safety and reliability.

[0018] The excavation method disclosed in this utility model involves the front end of the trestle bridge overlapping the step to be excavated, allowing clearing vehicles or other construction equipment to pass normally. Meanwhile, the rock-drilling trolley with a drilling mechanism located on the excavation surface independently performs blasting without interference, effectively improving construction efficiency. After all blasting holes in a construction section are completed, the longitudinal movement of the front approach bridge, in conjunction with the lifting mechanism driving the rock-drilling trolley's lifting motion, allows the trolley to retreat to a safe area. Simultaneously, the front approach bridge itself can also retreat to a safe area before blasting. This avoids damage caused by debris generated during blasting, thus ensuring the safety of the construction process.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention in the rock drilling state. Figure 2 This is a top view of the structure of the present invention in the rock drilling state, wherein (a) is rock drilling in the middle of the inverted arch, and (b) is rock drilling on the side of the inverted arch after lateral swing.

[0021] Figure 3 yes Figure 1 AA view.

[0022] Figure 4 This is a schematic diagram of the main structure of the rock drilling trolley in the lifting state of the front approach bridge and backward retraction.

[0023] Figure 5 This is a schematic diagram of the front approach bridge with the rock drilling trolley lowered into place.

[0024] Figure 6 This is a front view structural diagram of the approach bridge and the rock drilling trolley retracted to the main bridge.

[0025] Figure 7 This is a schematic diagram of the main structure of the rock drilling trolley in this utility model.

[0026] Figure 8 This is a top view schematic diagram of the rock drilling trolley in this utility model.

[0027] Figure 9 This is a schematic diagram of the blast hole excavation for the inverted arch involved in this utility model.

[0028] The labels in the diagram represent: 1. Main bridge; 11. Passage section; 12. Longitudinal beam; 13. Crossbeam; 14. Support wheel assembly; 2. Rock drilling trolley; 21. Rock drilling mechanism; 22. Traveling mechanism; 23. Rock drilling telescopic outrigger; 24. Support pad; 25. Swing arm; 26. Suspension section; 3. Front approach bridge; 4. Lifting mechanism; 41. Hanger; 42. Lifting components; 43. Hook. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1 to 9 As shown, the trestle bridge for rock drilling in this embodiment includes a main bridge 1 and a rock drilling trolley 2. The front end of the main bridge 1 is equipped with a longitudinally movable front approach bridge 3 (driven back and forth by a hydraulic cylinder, sprocket and chain mechanism, etc.) and a lifting mechanism 4 for raising and lowering the rock drilling trolley 2. The lifting mechanism 4 is detachably connected to the rock drilling trolley 2, and the rock drilling trolley 2 is equipped with a rock drilling mechanism 21. Here, longitudinal refers to the length direction of the tunnel, or the front-to-back direction, with the end of the tunnel being excavated being the front. Correspondingly, transverse refers to the width direction of the tunnel.

[0034] In this embodiment, the trestle bridge that can be used for rock drilling operations allows the rock drilling trolley 2, equipped with a rock drilling mechanism 21, located on the excavation face, to independently perform blast hole drilling (the specific location for blast hole drilling on the end face of the invert arch to be excavated is shown in...). Figure 9 As shown), the front approach bridge 3 of the trestle bridge is connected to the step to be excavated, allowing muck removal vehicles or other construction equipment (such as concrete mixer trucks) to pass normally (specifically as shown). Figure 1 As shown), they do not interfere with each other, which is beneficial to improving construction efficiency. After all the blasting holes in a construction section are completed, when charging and blasting, the front approach bridge 3 can move longitudinally, and in conjunction with the lifting mechanism 4, drive the rock drilling trolley 2 to move up and down, so that the rock drilling trolley 2 can move backward to a safe area. At the same time, the front approach bridge 3 itself can also move backward to a safe area (specifically as shown). Figure 6 As shown in the figure, this avoids damage caused by debris generated during the blasting process, resulting in good safety and reliability.

[0035] Specifically, such as Figure 7As shown, in this embodiment, the rock drilling trolley 2 is equipped with a walking mechanism 22 (e.g., a wheel set or tracks) and rock drilling telescopic outriggers 23 (e.g., the outriggers adopt a multi-segment sleeve structure and are driven to extend and retract by hydraulic cylinders or air cylinders). When the rock drilling trolley 2 needs to travel on the excavation face, the front approach bridge 3, or the main bridge 1, the rock drilling telescopic outriggers 23 retract, and the walking mechanism 22 provides support for the rock drilling trolley 2 and drives the rock drilling trolley 22 to travel; when the rock drilling mechanism 21 needs to perform blasting, the rock drilling telescopic outriggers 23 extend, and the rock drilling telescopic outriggers 23 provide support for the rock drilling trolley 2, while the walking mechanism 22 detaches from the excavation face, which helps to prevent damage to the walking mechanism 22 during the rock drilling process. At the same time, each rock drilling telescopic outrigger 23 is also conducive to adapting to the uneven excavation face, so that the rock drilling trolley 2 remains stable.

[0036] Furthermore, in this embodiment, the bottom of the rock drilling telescopic outrigger 23 is connected to a support pad 24 via a ball joint, allowing the support pad 24 to rotate relative to the rock drilling telescopic outrigger 23, thereby adapting to the uneven excavation surface and providing stable support for the rock drilling trolley 2.

[0037] Specifically, such as Figure 2 and Figure 8 As shown, in this embodiment, the rock drilling trolley 2 is provided with a swing arm 25 that can swing laterally, and the rock drilling mechanism 21 is provided on the swing arm 25. For example, the swing arm 25 is hinged to the rock drilling trolley 2, and the swing arm 25 swings laterally through a hydraulic cylinder, so that the working range of the rock drilling mechanism 21 can cover each blast hole on the end face of the arch to be excavated, reducing the blind spot of operation and the number of times the rock drilling trolley 2 moves.

[0038] See details Figure 3 In this embodiment, the main bridge 1 is provided with a passageway 11 for vehicles to pass through. The lifting mechanism 4 includes a hanger 41 located on the side of the passageway 11, a lifting component 42 located on the hanger 41, and a hook 43 connected to the lifting component 42. The rock drilling trolley 2 is provided with a hanging part 26 (e.g., a lifting ring, lifting hole, etc.) for detachable connection with the hook 43. The hanger 41 located on the side of the passageway 11 will not obstruct the passage of cleaning vehicles, etc., through the passageway 11, and the layout is reasonable. When it is necessary to lift the rock drilling trolley 2, the hook 43 is connected to the hanging part 26, and then the lifting component 42 is activated.

[0039] Furthermore, in this embodiment, the main bridge 1 includes two rows of longitudinal beams 12 and a crossbeam 13 located between the two rows of longitudinal beams 12. The structure is simple, reliable, and has a strong load-bearing capacity, making it suitable for tunnels with a large width. The passageway 11 is located on the crossbeam 13, and the hangers 41 are located on the two rows of longitudinal beams 12. Vehicles and other construction equipment can pass normally on the crossbeam 14, and the hangers 41 located on the two rows of longitudinal beams 12 will not obstruct traffic. The structure is simple and the layout is reasonable.

[0040] Of course, in other embodiments, the main bridge 1 includes two rows of longitudinal beams 12, the passage 11 is located on the top of the longitudinal beams 12, and the hanger 41 is located on the outside of the two rows of longitudinal beams 12. This helps to reduce the lateral width of the main bridge 1 itself, making it suitable for narrow tunnels. The hanger 41 also does not obstruct vehicles and other construction equipment from passing through the passage 11.

[0041] In a preferred embodiment, the lifting component 42 is a winch, which is connected to the hook 43 by a wire rope. It has good safety and reliability and can lift a large weight. Of course, in other embodiments, the lifting component 42 can also be a hydraulic cylinder, chain mechanism, etc., which will not be described in detail here.

[0042] The main bridge 1 is equipped with a support wheel assembly 14 for supporting the front approach bridge 3 (preferably, the support wheel assembly 14 is located on the crossbeam 13). During the rock drilling process of the rock drilling mechanism 21, the front approach bridge 3 overlaps with the step to be excavated, facilitating vehicles to pass over and under the main bridge 1. When blasting is required, the front approach bridge 3 retreats to a safe position to avoid damage during blasting, demonstrating a reasonable and effective structure. The support wheel assembly provides support for the front approach bridge 3, reducing the resistance to longitudinal movement and making it more convenient to use.

[0043] The excavation method in this embodiment, implemented using the aforementioned trestle bridge suitable for rock drilling, includes the following steps: S1, the front end of the approach bridge 3 is attached to the step to be excavated, the rock drilling trolley 2 is located below the approach bridge 3, and the rock drilling mechanism 21 performs blasting. Specifically, as follows... Figure 1 As shown; S2. After all blast holes are drilled, the front ramp 3 retracts to create upward space. The lifting mechanism 4 connects to the rock-drilling trolley 2, then drives the rock-drilling trolley 2 to rise, as detailed below. Figure 4 As shown; S3, the front approach bridge 3 moves forward so that the front end re-attaches to the step to be excavated, and the lifting mechanism 4 lowers the rock drilling trolley 2 onto the front approach bridge 3, as detailed below. Figure 5 As shown, the rock drilling trolley 2 retracts onto the main bridge 1 after passing the front approach bridge 3, and then the front approach bridge 3 retracts onto the main bridge 1, specifically as follows: Figure 6 As shown; S4. Blasting with explosives inside the blast hole.

[0044] In this excavation method, the front approach bridge 3 of the trestle bridge is attached to the step to be excavated, allowing clearing vehicles or other construction equipment to pass normally. Meanwhile, the rock-drilling trolley 2, equipped with a rock-drilling mechanism 21, independently drills blast holes on the excavation surface without interference, effectively improving construction efficiency. After all blast holes in a construction section are drilled, the longitudinal movement of the front approach bridge 3, in conjunction with the lifting mechanism 4, drives the rock-drilling trolley 2 to move up and down, allowing it to retreat to a safe area. Simultaneously, the front approach bridge 3 itself can also retreat to a safe area before blasting. This avoids damage caused by debris generated during blasting, ensuring the safety of the construction process. Furthermore, in this embodiment, the excavation method further includes the following steps: S5. The front approach bridge 3 moves forward so that its front end re-attaches to the step to be excavated. The rock drilling trolley 2 moves forward through the front approach bridge 3 to below the lifting mechanism 4. The lifting mechanism 4 connects with the rock drilling trolley 2, and then drives the rock drilling trolley 2 to rise and separate from the front approach bridge 3, as detailed below. Figure 5 As shown; S6. The front approach bridge 3 retracts to create space for descent, and the lifting mechanism 4 lowers the rock drilling trolley 2 onto the excavation surface. Then, the front approach bridge 3 moves forward so that its front end re-attaches to the step to be excavated, as detailed below. Figure 4 and Figure 1 As shown. After completing one cycle of drilling, charging, blasting, and cleaning, the drilling trolley 2 is lowered back to the excavation face to begin drilling for the next construction section, and this cycle continues.

[0045] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A trestle bridge that can be used for rock drilling operations, characterized in that: The system includes a main bridge (1) and a rock drilling trolley (2). The main bridge (1) has a longitudinally movable front approach bridge (3) and a lifting mechanism (4) for driving the rock drilling trolley (2) to rise and fall. The lifting mechanism (4) is detachably connected to the rock drilling trolley (2). The rock drilling trolley (2) is equipped with a rock drilling mechanism (21). The main bridge (1) is equipped with a passage section (11) for vehicles to pass through. The lifting mechanism (4) includes a gantry (41) on the side of the passage section (11), a lifting component (42) on the gantry (41), and a hook (43) connected to the lifting component (42). The rock drilling trolley (2) is equipped with a hanging part (26) for detachably connecting to the hook (43).

2. The trestle bridge for rock drilling as described in claim 1, characterized in that: The rock drilling trolley (2) is equipped with a walking mechanism (22) and rock drilling telescopic outriggers (23).

3. The trestle bridge for rock drilling construction according to claim 2, characterized in that: The bottom of the rock drilling telescopic outrigger (23) is connected to a support pad (24) via a ball joint.

4. The trestle bridge for rock drilling construction according to claim 1, characterized in that: The rock drilling trolley (2) is equipped with a swing arm (25) that can swing laterally, and the rock drilling mechanism (21) is located on the swing arm (25).

5. A trestle bridge for rock drilling operations according to any one of claims 1 to 4, characterized in that: The main bridge (1) includes two rows of longitudinal beams (12) and a crossbeam (13) located between the two rows of longitudinal beams (12). The passage section (11) is located on the crossbeam (13), and the hanger (41) is located on at least one row of longitudinal beams (12).

6. A trestle bridge for rock drilling operations according to any one of claims 1 to 4, characterized in that: The main bridge (1) includes two rows of longitudinal beams (12), the passage section (11) is located on the top of the longitudinal beams (12), and the hanger (41) is located on the outside of at least one row of the longitudinal beams (12).

7. A trestle bridge for rock drilling operations according to any one of claims 1 to 4, characterized in that: The lifting component (42) is a winch, which is connected to the hook (43) by a wire rope; And / or, the main bridge (1) is provided with a support wheel assembly (14) that supports the front approach bridge (3).

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