Tunnel working well head trestle with hoisting function

Abstract

This invention discloses a tunnel working shaft opening trestle bridge with hoisting function, including a left bridge, a right bridge, bridge plates installed on the left and right bridges respectively for sealing the working shaft opening, and gantry cranes supported on the left and right bridges respectively. The left and right bridges each have at least two traveling sections under them that can support the tunnel surface and travel on the tunnel surface. When the bridge plates are removed from above the shaft opening, the gantry cranes can stand on the left and right bridges to hoist materials into the working shaft. The length and width of the bridge plates are smaller than the length and width of the working shaft opening, and the bridge plates can be sunk into the working shaft opening so that the bridge surface of the bridge plates is flush with the tunnel surface around the working shaft.

Description

Technical Field

[0001] This invention relates to a tunnel working shaft opening trestle bridge that also has a hoisting function, belonging to the field of tunnel construction equipment technology. Background Technology

[0002] In the excavation of one type of tunnel, there is often a parallel small-diameter functional pipeline with functions such as drainage or pipeline laying. The excavation of this functional pipeline requires the establishment of several working shafts, each seven to eight meters long, at equal intervals along the tunnel surface of the already excavated section. Equipment for excavating the functional pipeline and the concrete jacking pipe lining the inner wall of the pipeline are then hoisted down through these working shafts. Here, the already excavated section of the tunnel has essentially completed the construction of the concrete segments or lining of the tunnel walls and the pouring of the concrete tunnel surface.

[0003] Because the tunnel above is still under construction, the excavated soil and rock need to be transported to the tunnel entrance through the already excavated tunnel, and building materials also need to be transported forward through the already excavated tunnel. The existence of the working shaft becomes a difficult obstacle to overcome for both materials and personnel to pass through. At the same time, since the excavation of the functional pipeline below and the excavation of the tunnel above are usually carried out simultaneously, it is often necessary to hoist pipe jacking down from the opening of the working shaft. This presents a difficult problem: it is necessary to ensure the passage of materials for the tunnel excavation above the working shaft, and at the same time, to ensure the supply of materials for the excavation of the functional pipeline below through the working shaft.

[0004] To solve this problem, the traditional method is to build a temporary bridge at the opening of the working shaft to ensure the passage of materials and personnel during the tunnel excavation process. When it is necessary to hoist materials such as pipe jacking into the working shaft, a crane is brought in from a distance to move the bridge, and then the crane is used to hoist the pipe jacking materials into the shaft. Finally, the bridge is put back on the shaft opening to restore tunnel access.

[0005] Problems with the above measures: 1. The bridge opening is narrow and the bridge deck is seven or eight meters long. When using a crane to temporarily erect or move the bridge deck, the crane needs to move forward or backward after lifting the bridge deck to place it in a suitable position. Unlike in open areas, the crane cannot rotate 180° on the spot to move the lifted bridge deck. The operation is complicated, time-consuming and labor-intensive. 2. Cranes cannot be parked next to the shaft opening under normal circumstances, which would obstruct the passage of people and goods. They can only be parked at a certain interval in the tunnel, in a wide area specially set up next to the tunnel (for temporary storage of maintenance personnel or equipment when the tunnel is built and put into use). When needed, they need to travel a long distance to carry out hoisting, which is also time-consuming and labor-intensive, increasing construction costs. 3. The bridge deck itself is about 0.7 meters thick. When it is built at the wellhead, the bridge deck is much higher than the tunnel road surface at both ends, making it difficult for engineering vehicles to pass smoothly. Summary of the Invention

[0006] The technical problem to be solved by this invention is: how to easily and quickly build bridge panels at the wellhead and remove them from the wellhead, and how to conveniently and quickly hoist goods down into the well.

[0007] To address the above problems, the technical solution proposed by this invention is as follows: A tunnel working shaft opening trestle with hoisting function includes a left bridge, a right bridge, bridge plates installed on the left and right bridges respectively for sealing the working shaft opening, and gantry cranes supported on the left and right bridges respectively. The left and right bridges each have at least two traveling sections under them that can be supported on the tunnel road surface and travel on the tunnel road surface. When the bridge plates are removed from above the shaft opening, the gantry cranes can stand on the left and right bridges to hoist materials into the working shaft.

[0008] The length and width of the bridge deck are both smaller than the length and width of the working well opening, allowing the bridge deck to be sunk into the working well opening so that the bridge deck surface is flush with the tunnel road surface around the working well.

[0009] The bridge deck has a left mounting portion and a right mounting portion on each side, and the left mounting portion and the right mounting portion are installed on the left bridge and the right bridge, respectively.

[0010] The bridge deck is located between the left and right bridges. A lifting mechanism is provided between its left side and the left mounting part, and between its right side and the right mounting part. The bridge deck can rise and fall under the action of the lifting mechanism.

[0011] A lifting mechanism 2 is provided between the left bridge and each of its traveling sections 1, and between the right bridge and each of its traveling sections 1, for enabling the traveling sections 1 on the left bridge to rise and fall relative to the left bridge, and enabling the traveling sections 1 on the right bridge to rise and fall relative to the right bridge.

[0012] The distance between the left and right bridges is greater than the width of the manhole opening, and the left and right bridges can pass through the tunnel surface on both sides of the manhole via their respective travel sections.

[0013] The bridge deck is located at one end of the left and right bridges, and the gantry crane is located at the other end of the left and right bridges.

[0014] The distance between the left and right bridges is less than the width of the working well opening. Each of the left and right bridges has only two traveling sections located at both ends of the left and right bridges. The system also includes a bridge frame, on which the bridge plates are mounted. The length and width of the bridge frame are both less than the length and width of the working well opening. The two sides of the bridge frame are fixed to the left and right mounting sections, respectively. The bottom of the bridge frame is lower than the height of the first traveling section after it is raised but higher than the height of the first traveling section after it is lowered. The left and right mounting sections can slide back and forth on the left and right bridges, respectively. The gantry crane can also slide back and forth on the left and right bridges.

[0015] The bridge deck consists of a left half bridge deck and a right half bridge deck. The left side of the left half bridge deck is hinged to the left side of the bridge frame, and the right side of the right half bridge deck is hinged to the right side of the bridge frame. Under the action of external force, the left half bridge deck can be flipped to the upper left to open the left side of the working well, and the right half bridge deck can be flipped to the upper right to open the right side of the working well.

[0016] The bridge plate consists of a left half bridge plate and a right half bridge plate. The inner front side and the inner rear side of the bridge frame are respectively provided with guide slides. The front and rear ends of the left half bridge plate and the right half bridge plate are both placed on the guide slides. Under the action of external force, the left half bridge plate can be pushed out to the left side of the working well opening and pushed back, and the right half bridge plate can be pushed out to the right side of the working well opening and pushed back.

[0017] The bridge deck is placed on the bridge frame, and its upper surface is provided with a hook structure, which can be lifted by the sling of the gantry crane and placed on the tunnel surface in front of or behind the working shaft.

[0018] The gantry crane has a crane beam and a transverse crane rail, which extends to the left and / or right out of the side of the trestle bridge.

[0019] Beneficial effects: The trestle bridge is very convenient to set up and remove. It can hoist materials into the working shaft without calling cranes from a distance. The gantry cranes spanning the left and right bridges can be put into use immediately. After the materials are hoisted, there is no need to leave the site. This not only ensures the normal passage of personnel and materials in the tunnel, but also allows materials to be hoisted through the working shaft to meet the needs of the functional pipeline excavation below. The bridge deck of the trestle bridge is flush with the road surface of the tunnel in front of and behind the working shaft, ensuring that engineering vehicles transporting materials can pass smoothly. The bridge deck can be quickly removed from the shaft opening or opened on the spot. After the materials are hoisted into the shaft, the bridge deck can be quickly covered to seal the shaft opening. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the trestle bridge described in Embodiment 1 located above the manhole opening inside the tunnel. The diagram shows that the bridge deck has sealed the manhole opening and the top surface of the bridge deck is flush with the tunnel road surface. Figure 2 for Figure 1 A partial schematic diagram; Figure 3 This is a three-dimensional schematic diagram of the trestle bridge described in Embodiment 1 located above the working shaft opening inside the tunnel. The diagram shows that the bridge deck has been raised and is moving forward with the trestle bridge along with the gantry crane, in preparation for opening the shaft opening so that the gantry crane is positioned above the shaft opening. Figure 4 This is a three-dimensional schematic diagram of the trestle bridge described in Embodiment 1 located above the working shaft opening inside the tunnel. The diagram shows that the bridge deck has been removed from the shaft opening, and the gantry crane is positioned above the shaft opening to lift the jacking pipe into the shaft. Figure 5 This is a three-dimensional schematic diagram of the trestle bridge described in Embodiment 2 located above the manhole opening inside the tunnel. The diagram shows that the bridge deck has sealed the manhole opening and the top surface of the bridge deck is flush with the tunnel road surface. Figure 6 for Figure 5 A magnified view of a portion of the image; Figure 7 This is a three-dimensional schematic diagram of the trestle bridge described in Embodiment 2 located above the working shaft opening inside the tunnel. The diagram shows that the bridge deck has been moved away from the working shaft opening along with the bridge frame, and the gantry crane is located above the shaft opening, hoisting the jacking pipe into the shaft. Figure 8 for Figure 7 A magnified view of a portion of the image; Figure 9 This is a three-dimensional schematic diagram of the trestle bridge described in Embodiment 2 located in the working shaft opening area inside the tunnel. The diagram shows the bridge frame and its bridge deck landing on the ground behind the shaft opening to provide support. The front end of the left and right bridges rises upwards. Under the push of the rear end of the bridge, the front end of the left and right bridges begins to cross the working shaft opening. The horizontal straight arrow in the diagram points forward. Figure 10 This is a three-dimensional schematic diagram of the trestle bridge described in Embodiment 2 located in the working shaft opening area inside the tunnel. The diagram shows the bridge frame and its bridge deck landing on the ground in front of the shaft opening to provide support. The rear travel sections of the left and right bridges rise upwards. With the front travel section being pulled, the rear ends of the left and right bridges begin to cross the working shaft opening. The horizontal straight arrow in the diagram points forward. Figure 11 This is a three-dimensional schematic diagram of the bridge plate arrangement described in Embodiment 3. The diagram shows that the left and right halves of the bridge plate seal the wellhead. Figure 12 This is a three-dimensional schematic diagram of the bridge plate opening method described in Embodiment 3. The diagram shows that the left and right halves of the bridge plate are opened by a winch in a flip-top manner. Figure 13 This is a three-dimensional schematic diagram of the bridge plate arrangement described in Embodiment 4, showing that the left and right halves of the bridge plate seal the wellhead. Figure 14 This is a three-dimensional schematic diagram of the bridge plate opening method described in Embodiment 4, showing the left and right halves of the bridge plate beginning to slide open to both sides; Figure 15 This is a three-dimensional schematic diagram of the bottom structure of the cable tray and cable plate described in Embodiment 4; Figure 16 This is a three-dimensional schematic diagram of the bridge plate arrangement described in Embodiment 5, showing the bridge plate sealing the wellhead; Figure 17 This is a three-dimensional schematic diagram of the bridge plate movement method described in Embodiment 5. The diagram shows that the bridge frame and its bridge plate have been moved as a whole to the tunnel surface behind the wellhead by the gantry crane. Figure 18 This is a three-dimensional schematic diagram of the gantry crane installation method described in Embodiment Six.

[0021] In the diagram: 100. Trestle; 1. Left bridge; 2. Right bridge; 3. Bridge deck; 301. Left half of bridge deck; 302. Right half of bridge deck; 303. Hook structure; 4. Bridge frame; 5. Gantry crane; 501. Lifting cable; 502. Crane beam; 503. Transverse crane rail; 6. Traveling section one; 601. Traveling wheel one; 602. Drive motor one; 7. Traveling section two; 701. Traveling wheel two; 702. Drive motor two; 8. Left installation 9. Right mounting section; 10. Hydraulic cylinder one; 11. Crossbeam; 12. Lifting mechanism two; 121. Hydraulic cylinder two; 122. Guide component; 13. Left guide rail; 14. Right guide rail; 15. Longitudinal groove; 16. Lead screw; 17. Winch; 18. Cable; 19. Guide slide; 20. Reverse threaded lead screw; 201. Nut component; 21. Drive motor three; 200. Tunnel; 300. Working shaft; 400. Tunnel pavement. Detailed Implementation

[0022] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1

[0023] like Figure 1-4As shown, a tunnel working shaft trestle with hoisting function includes a left bridge 1, a right bridge 2, bridge plates 3 installed on the left bridge 1 and right bridge 2 respectively to cover the opening of the working shaft 300, and a gantry crane 5 supported on the left bridge 1 and right bridge 2 respectively. The left bridge 1 and right bridge 2 each have at least two traveling sections 6 under them, capable of supporting the tunnel surface 400 and traveling on the tunnel surface 400. In application, the trestle 100 moves within the tunnel 200 using the traveling sections 6 located under the left bridge 1 and right bridge 2, positioning the bridge plates 3 at the opening of the working shaft 300 and sealing the opening, thus connecting the tunnel surface roads at both ends of the opening. Pedestrians and material transport vehicles can pass normally between the left bridge 1 and right bridge 2 below the gantry crane 5. When the bridge plates 3 are removed from above the opening, the gantry crane 5 can straddle the left bridge 1 and right bridge 2 to hoist materials into the working shaft 300. In this way, the construction and removal of the trestle bridge 100 are very convenient. Materials can be hoisted into the working shaft 300 without the need to call a crane from a distance. The gantry crane 5, which spans the left bridge 1 and the right bridge 2, can be put into use immediately. After the materials are hoisted, there is no need to leave the site. This ensures the normal passage of personnel and materials in the tunnel and also allows materials to be hoisted through the working shaft 300 to meet the needs of the functional pipeline excavation below. As a result, the construction, use and removal of the trestle bridge 100 are simple and efficient.

[0024] like Figure 2 As shown, the traveling section 6 here includes a traveling wheel 601, a drive motor 602, and a steering mechanism, etc.

[0025] like Figure 1 As shown, the length and width of the bridge deck 3 are both smaller than the length and width of the wellhead of the working well 300, so that it can be sunk into the wellhead of the working well 300. The bridge deck 3 can be sunk into the wellhead of the working well 300 so that the bridge deck of the bridge deck 3 can be flush with the tunnel road surface 400 around the working well 300.

[0026] like Figure 1 , 2 As shown, the bridge plate 3 has a left mounting part 8 and a right mounting part 9 on both sides, which are respectively mounted on the left bridge 1 and the right bridge 2. The left mounting part 8 and the right mounting part 9 can be fixed or movable and can slide back and forth along their respective left bridge 1 and right bridge 2 as needed.

[0027] The bridge deck 3 is located between the left bridge 1 and the right bridge 2. A lifting mechanism is installed between its left side and the left mounting part 8, and between its right side and the right mounting part 9. The bridge deck 3 can rise and fall under the action of the lifting mechanism. When falling, the bridge deck 3 can be lowered into the manhole, making the bridge surface flush with the tunnel road surface 400. When rising, the bridge deck 3 can be raised above the tunnel road surface 400, allowing it to move back and forth with the trestle bridge 100, facilitating the sealing and removal of the manhole.

[0028] The lifting mechanism here includes lifting components, which can be cylinder-type components, such as electric cylinders, hydraulic cylinders 10 or pneumatic cylinders, or threaded screws, preferably hydraulic cylinders 10.

[0029] In this embodiment, the distance between the left bridge 1 and the right bridge 2 is designed to be greater than the width of the working well 300 opening, so that the traveling section 6 under the left bridge 1 and the traveling section 6 under the right bridge 2 can pass through the tunnel road surface on the left and right sides of the opening respectively.

[0030] In this embodiment, the bridge plate 3 is located at one end of the left bridge 1 and the right bridge 2, and the gantry crane 5 is located at the other end of the left bridge 1 and the right bridge 2. When the working well 300 is needed, the bridge plate 3 is raised, the trestle 100 moves in the direction of the bridge plate 3, the bridge plate 3 leaves the well opening, and the gantry crane 5 is positioned above the well opening to carry out hoisting operations.

[0031] It should be noted that the bridge plate 3 and its left mounting portion 8 and right mounting portion 9 on both sides connect the left bridge 1 and right bridge 2 on both sides, and together they form a structure that maintains the integrity of the trestle 100 during application. To enhance the integrity of the trestle 100 during overall movement, snap-fit ​​crossbeams 11 are provided between the front end and rear end of the left bridge 1 and right bridge 2 respectively (not shown in this embodiment, please refer to the appendix of Embodiment 2). Figure 9 , 10 When the trestle bridge 100 is in use, the crossbeam 11 can be removed to ensure the passage of people and vehicles.

[0032] The trestle 100 has a simple circuit and / or remote control setup. When the trestle 100 moves, the operator can sit on the bridge plate 3 and move along with it.

[0033] The gantry crane 5 is shaped like a gate and has columns on both sides for support. Example 2

[0034] like Figure 5-10 The difference between this embodiment and the first embodiment is that a lifting mechanism 2 12 is provided between the left bridge 1 and each of its traveling parts 1 6 and between the right bridge 2 and each of its traveling parts 1 6, so that the traveling parts 1 6 on the left bridge 1 can be raised and lowered relative to the left bridge 1, and the traveling parts 1 6 on the right bridge 2 can be raised and lowered relative to the right bridge 2.

[0035] In this embodiment, the distance between the left bridge 1 and the right bridge 2 is less than the width of the manhole opening of the working shaft 300. Both the left bridge 1 and the right bridge 2 have only two traveling sections 6 located at both ends of the left bridge 1 and the right bridge 2. The trestle 100 also includes a bridge frame 4, with the bridge plate 3 installed on the bridge frame 4. The length and width of the bridge frame 4 are both less than the length and width of the manhole opening of the working shaft 300, so that the bridge frame 4 can also be placed into the manhole opening, ensuring that the bridge plate 3 can be flush with the tunnel road surface at both ends of the manhole opening. The two sides of the bridge frame 4 are fixed to the left mounting section 8 and the right mounting section 9, respectively. The height of the bottom of the bridge frame 4 is lower than the height of the traveling section 6 after it is raised but higher than the height of the traveling section 6 after it is lowered. The left mounting section 8 and the right mounting section 9 can slide back and forth on the left bridge 1 and the right bridge 2, respectively. The gantry crane 5 can slide back and forth on the left bridge 1 and the right bridge 2.

[0036] like Figure 5-8 As shown, during the application process, the trestle 100 straddles the working shaft from front to back. The front travel section 6 of the left bridge 1 and the right bridge 2 is supported on the tunnel surface 400 in front of the working shaft 300, and the rear travel section 6 of the left bridge 1 and the right bridge 2 is supported on the tunnel surface 400 behind the working shaft 300. When it is necessary to seal the manhole, the bridge plate 3 is located above the working manhole 300. The lifting mechanism 2 12 is operated to lower the left bridge 1 and the right bridge 2. The bridge frame 4, together with the bridge plate 3, falls down to the working manhole 300 until the surface of the bridge plate 3 is flush with the tunnel road surface 400 in front of and behind the working manhole 300. When it is necessary to open the manhole to hoist materials into the working manhole 300, the lifting mechanism 2 12 is operated to raise the left bridge 1 and the right bridge 2. The bridge frame 4, together with the bridge plate 3, rises from the manhole to above the tunnel road surface. The bridge plate 3 is pushed forward or backward along the left bridge 1 and the right bridge 2 away from the working manhole 300. Then the gantry crane 5 is slid to the top of the working manhole 300 to carry out the hoisting operation.

[0037] like Figure 9-10As shown, when the trestle bridge 100 needs to cross the working shaft 300, taking the forward crossing of the working shaft 300 as an example, the bridge frame 4 together with the bridge plate 3 is slid to the front of the trestle bridge 100 near the edge of the working shaft 300. The lifting mechanism 12 is operated to lower the left bridge 1 and the right bridge 2 until the bottom of the bridge frame 4 touches the ground as support. The gantry crane 5 is slid to the rear of the trestle bridge to act as a counterweight. The lifting mechanism 12 is operated to raise the two left and right traveling parts 6 at the front of the trestle bridge 100. The two left and right traveling parts 6 at the rear of the trestle bridge 100 drive the left bridge 1 and the right bridge 2 forward relative to the bridge frame 4 to slide forward until they cross the working shaft 300. Then, the two left and right traveling parts 6 at the front are lowered to allow them to slide forward. By placing the bridge 100 on the ground, the trestle can be erected or materials hoisted into the working shaft by moving the bridge frame 4 and the gantry crane 5. To move the entire trestle 100 forward across the working shaft 300, the bridge frame 4 is moved to the front of the working shaft at the front of the trestle 100 and placed on the ground for support. The gantry crane 5 is moved to the front of the trestle 100 to provide additional weight. The lifting mechanism 12 is operated to raise the two left and right traveling sections 6 at the rear of the trestle. The left bridge 1 and right bridge 2 are then dragged forward relative to the bridge frame 4, sliding forward until they cross the working shaft 300. Finally, the two left and right traveling sections 6 at the rear are lowered to the ground, thus allowing the entire trestle 100 to cross the working shaft 300 forward. The principle for moving the trestle 100 backward across the working shaft 300 is the same as for moving it forward, using the bridge frame 4 as support and the gantry crane 5 for additional weight.

[0038] like Figure 6 As shown, it should be noted that the lower part of both sides of the gantry crane 5 has a traveling section 7, which includes a traveling wheel 701 and a drive motor 702. The top surfaces of the left bridge 1 and the right bridge 2 respectively have a left guide rail 13 and a right guide rail 14 for the traveling wheel 701 to travel on.

[0039] It should also be noted that the movement of the gantry crane 5 and the cable tray 4 on the left bridge 1 and right bridge 2 is independent of each other. The left mounting part 8 and right mounting part 9 on both sides of the cable tray 4 are actually sleeves fitted onto the left bridge 1 and right bridge 2 respectively. A longitudinal groove 15 is opened in the middle of the top of the sleeve. The left guide rail 13 and right guide rail 14 are located in the longitudinal groove 15 of the left mounting part 8 and the right mounting part 9 respectively. The left mounting part 8 and right mounting part 9 can slide relative to the left guide rail 13 and the right guide rail 14 respectively.

[0040] The longitudinal sliding of the cable tray 4 is achieved by a propulsion mechanism provided between the left mounting part 8 and the left bridge 1 and between the right mounting part 9 and the right bridge 2. This propulsion mechanism can be a cylinder, such as a hydraulic cylinder or an electric cylinder, or a lead screw 16 driven by a motor.

[0041] Preferably, the lifting mechanism 2 12 includes a hydraulic cylinder 2 121 and a guide member 122. Example 3

[0042] like Figure 11-12 As shown, this is a further improvement based on Embodiment 2. The bridge plate 3 consists of a left half-bridge plate 301 and a right half-bridge plate 302. The left side of the left half-bridge plate 301 is hinged to the left side of the bridge frame 4, and the right side of the right half-bridge plate 302 is hinged to the right side of the bridge frame 4. Under external force, the left half-bridge plate 301 can be flipped upwards to the left to open the left side of the working well, and the right half-bridge plate 302 can be flipped upwards to the right to open the right side of the working well. The external force described in this embodiment can be applied by a hydraulic cylinder, electric cylinder, etc., or it can be provided by a winch 17 equipped with a motor and cable 18. When using the winch 17, the upper surfaces of the left half-bridge plate 301 and the right half-bridge plate 302 have hook structures 303. Example 4

[0043] like Figure 13-15 As shown, this is a further improvement based on Embodiment 2. The bridge plate 3 consists of a left half bridge plate 301 and a right half bridge plate 302. The inner front end and inner rear end of the bridge frame 4 are respectively provided with guide slides 19. The front and rear ends of the left half bridge plate 301 and the right half bridge plate 302 are both placed on the guide slides 19. Under the action of external force, the left half bridge plate 301 can be pushed out to the left side of the working well 300 opening and pushed back, and the right half bridge plate 302 can be pushed out to the right side of the working well 300 opening and pushed back.

[0044] The external force described in this embodiment can be applied by a hydraulic cylinder, an electric cylinder, or the like.

[0045] Preferably, the front and rear parts of the inner side of the bridge frame 4 are respectively provided with reverse threaded screws 20 with opposite left and right thread directions. The front ends of the left half bridge plate 301 and the right half bridge plate 302 are respectively provided with nuts 201 fitted on the left and right ends of the front reverse threaded screws 20. The rear ends of the left half bridge plate 301 and the right half bridge plate 302 are respectively provided with nuts 201 fitted on the left and right ends of the rear reverse threaded screws 20. Both the front reverse threaded screws 20 and the rear reverse threaded screws 20 are provided with drive motors 21. The external force is applied by the drive motors 21. Example 5

[0046] like Figure 16-17 As shown, it is a further improvement based on Embodiment 2. The bridge plate 3 is placed on the bridge frame 4, and its upper surface is provided with a hook structure 303, which can be lifted by the sling 501 of the gantry crane 5 and placed on the tunnel surface 400 in front of or behind the working shaft 300. Example 6

[0047] like Figure 18 As shown, its difference from the above embodiment is that the gantry crane 5 has a crane beam 502 and a transverse crane rail 503, which extends to the left and / or right beyond the side of the trestle 100. It can be used to lift materials to the area outside the tunnel side.

[0048] The above embodiments are only used to describe the present invention more clearly, and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. A tunnel working shaft opening trestle bridge with hoisting function, characterized in that: Includes a left bridge (1), a right bridge (2), bridge plates (3) installed on the left bridge (1) and right bridge (2) respectively for sealing the opening of the working well (300), and gantry cranes (5) supported on the left bridge (1) and right bridge (2) respectively. The left bridge (1) and right bridge (2) respectively have at least two traveling parts (6) under them that can be supported on the tunnel road surface (400) and can travel on the tunnel road surface (400). When the bridge plate (3) is removed from above the opening, the gantry crane (5) can stand on the left bridge (1) and right bridge (2) to hoist materials into the working well (300).

2. The tunnel working shaft opening trestle bridge with hoisting function as described in claim 1, characterized in that: The length and width of the bridge plate (3) are both smaller than the length and width of the wellhead (300). The bridge plate (3) can be sunk into the wellhead (300) so that the bridge surface of the bridge plate (3) can be flush with the tunnel road surface (400) around the wellhead (300).

3. The tunnel working shaft entrance trestle bridge with hoisting function as described in claim 2, characterized in that: The bridge plate (3) has a left mounting part (8) and a right mounting part (9) on both sides, and the left mounting part (8) and the right mounting part (9) are respectively installed on the left bridge (1) and the right bridge (2).

4. The tunnel working shaft opening trestle bridge with hoisting function as described in claim 3, characterized in that: The bridge plate (3) is located between the left bridge (1) and the right bridge (2). A lifting mechanism is provided between its left side and the left mounting part (8) and between its right side and the right mounting part (9). The bridge plate (3) can rise and fall under the action of the lifting mechanism.

5. The tunnel working shaft opening trestle bridge with hoisting function as described in claim 3, characterized in that: Lifting mechanism 2 (12) is provided between the left bridge (1) and each of its traveling parts 1 (6) and between the right bridge (2) and each of its traveling parts 1 (6), for enabling the traveling parts 1 (6) on the left bridge (1) to rise and fall relative to the left bridge (1), and enabling the traveling parts 1 (6) on the right bridge (2) to rise and fall relative to the right bridge (2).

6. The tunnel working shaft opening trestle bridge with hoisting function according to claim 4 or 5, characterized in that: The distance between the left bridge (1) and the right bridge (2) is greater than the width of the wellhead (300). The left bridge (1) and the right bridge (2) can pass through the tunnel road surface (400) on both sides of the wellhead (300) through their respective travel sections (6).

7. The tunnel working shaft opening trestle bridge with hoisting function as described in claim 6, characterized in that: The bridge deck (3) is located at one end of the left bridge (1) and the right bridge (2), and the gantry crane (5) is located at the other end of the left bridge (1) and the right bridge (2).

8. The tunnel working shaft entrance trestle bridge with hoisting function as described in claim 5, characterized in that: The distance between the left bridge (1) and the right bridge (2) is less than the width of the wellhead of the working well (300). The left bridge (1) and the right bridge (2) each have only two traveling parts (6) located at both ends of the left bridge (1) and the right bridge (2). The bridge also includes a bridge frame (4). The bridge plate (3) is installed on the bridge frame (4). The length and width of the bridge frame (4) are both less than the length and width of the wellhead of the working well (300). The two sides of the bridge frame (4) are fixed to the left mounting part (8) and the right mounting part (9) respectively. The bottom height of the bridge frame (4) is lower than the height of the traveling part (6) after it is raised but higher than the height of the traveling part (6) after it is lowered. The left mounting part (8) and the right mounting part (9) can slide back and forth on the left bridge (1) and the right bridge (2) respectively. The gantry crane (5) can slide back and forth on the left bridge (1) and the right bridge (2).

9. The tunnel working shaft opening trestle bridge with hoisting function according to claim 8, characterized in that: The bridge plate (3) is composed of a left half bridge plate (301) and a right half bridge plate (302). The left side of the left half bridge plate (301) is hinged to the left side of the bridge frame (4), and the right side of the right half bridge plate (302) is hinged to the right side of the bridge frame (4). Under the action of external force, the left half bridge plate (301) can be flipped to the left and the left side of the working well can be opened, and the right half bridge plate (302) can be flipped to the right and the right side of the working well can be opened.

10. The tunnel working shaft opening trestle bridge with hoisting function according to claim 8, characterized in that: The bridge plate (3) is composed of a left half bridge plate (301) and a right half bridge plate (302). The inner front end and the inner rear end of the bridge frame (4) are respectively provided with guide slides (19). The front and rear ends of the left half bridge plate (301) and the right half bridge plate (302) are both placed on the guide slides (19). Under the action of external force, the left half bridge plate (301) can be pushed out to the left side of the working well (300) and pushed back, and the right half bridge plate (302) can be pushed out to the right side of the working well (300) and pushed back.

11. The tunnel working shaft opening trestle bridge with hoisting function as described in claim 8, characterized in that: The bridge plate (3) is placed on the bridge frame (4), and its upper surface is provided with a hook structure (303), which can be lifted by the sling (501) of the gantry crane (5) and placed on the tunnel surface (400) in front of or behind the working shaft (300).

12. The tunnel working shaft opening trestle bridge with hoisting function as described in claim 8, characterized in that: The gantry crane (5) has a gantry beam (502) and a transverse gantry rail (503), which extends to the left and / or right out of the side of the trestle (100).

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