A water drill support device for breaking a tunnel portal before shield launching

Abstract

This utility model provides a water drill support device for breaching the portal before tunnel boring machine (TBM) launch. It includes a movable scaffold, two boom supports, a hoist, and three electric hoists. The hoist is mounted on the scaffold uprights and has a central support fixed to it. One end of each of the two boom supports is rotatably connected to the central support, and the other end of each boom support is fixed with a water drill. The movement trajectories of the two boom supports are on the same horizontal plane, and the projected length of the boom supports on the horizontal plane is less than the radius of the portal. The electric hoists are all located at the top of the scaffold, and three drive chains on the three electric hoists are connected to the central support and the two boom supports, respectively. The advantages of this utility model are improved drill bit stability, ensuring construction accuracy and worker safety.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel construction technology, specifically a water drill support device for breaking through the tunnel portal before shield launching. Background Technology

[0002] For the demolition of the tunnel portal before the shield tunneling machine starts, existing technologies include a fixed scaffolding and pneumatic hammer demolition scheme and a fixed scaffolding and water drill support scheme. The fixed scaffolding and pneumatic hammer demolition scheme has the following technical drawbacks: poor safety, as workers operating heavy pneumatic hammers at heights are at risk of falls from heights and scaffold instability and collapse; low efficiency, as manual demolition is slow, single-point operations require repeated adjustments to the position, and pneumatic hammer demolition is prone to frequent maintenance; insufficient precision, relying on manual positioning, which easily leads to over-excavation of the demolition boundary; and environmental pollution, as pneumatic hammer operations generate a large amount of dust and noise, requiring additional dust and noise reduction equipment and increasing construction complexity. The fixed scaffolding support water drill demolition scheme has the following technical drawbacks: limited coverage area, after the scaffolding is fixed, the water drill can only operate within a limited radius, requiring multiple disassemblies and reassemblies of the scaffolding to adjust its position, making continuous demolition impossible; large space occupation, the scaffolding support system needs to occupy the space around the opening, affecting other work processes and resulting in poor construction organization flexibility; low level of mechanization, the water drill still needs to be manually moved and positioned, resulting in high labor intensity and difficulty in coordinating multiple drill bits.

[0003] During the construction of the tunnel portal, due to the large size of the portal and the excessive construction height, there are often hidden dangers such as poor stability of the water drill, low construction efficiency, and safety hazards for workers working at height continuously. Summary of the Invention

[0004] The problem to be solved by this utility model is to provide a water drill support device for breaking through the tunnel portal before the shield tunneling starts, which overcomes the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a water drill support device for breaking through the portal before shield tunneling, comprising a movable scaffold, two boom supports, a hoist, and three electric hoists. The hoist is installed on the uprights of the scaffold, and a central support is fixed on the hoist. One end of each of the two boom supports is rotatably connected to the central support, and the other end of each of the two boom supports is fixed with a water drill. The movement trajectories of the two boom supports are located on the same horizontal plane, and the projected length of the boom support on the horizontal plane is less than the radius of the portal. The electric hoists are all located at the top of the scaffold, and the three transmission chains on the three electric hoists are respectively connected to the central support and the two boom supports.

[0006] A water drill support device for breaching the portal before shield tunneling starts includes scaffolding fixed in front of the portal, two telescopic boom supports, a central support, and two electric hoists. The central support is fixed to the scaffolding at the center of the portal. One end of each of the two boom supports is rotatably connected to the central support, and the other end of each boom support is fixed with a water drill. The rotation trajectories of the two boom supports are on the same horizontal plane, and two transmission chains on the two electric hoists are respectively connected to the two boom supports.

[0007] Optionally, the arm span support includes a fixed frame and a telescopic frame. The fixed frame is hinged to the central support, the telescopic frame is slidably connected to the fixed frame, the telescopic frame is fixed to the fixed frame by a limiting member, and the water drill is fixed to the end of the telescopic frame.

[0008] The advantages and positive effects of this utility model are: due to the adoption of the above technical solution, the structure is simple, easy to assemble, sturdy and durable, low in cost, improves construction accuracy, has a wide range of applications, high construction efficiency, and can better ensure the safety of construction personnel. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of this utility model;

[0010] In the picture: 1. Scaffolding; 2. Arm span support; 3. Water drill; 4. Central support; 5. Electric hoist crane; 6. Drive chain; 7. Edge of the starting front doorway. Detailed Implementation

[0011] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

[0012] like Figure 1 As shown, this utility model provides a water drill support device for breaking through the tunnel portal before shield tunneling starts. It includes a movable scaffold 1, two boom supports 2, a lift, and three electric hoists 5. The lift is installed on the uprights of the scaffold 1, and a central support 4 is fixed on the lift. One end of each of the two boom supports 2 is rotatably connected to the central support 4, and the other end of each of the two boom supports 2 is fixed with a water drill 3. The movement trajectory of the two boom supports 2 is on the same horizontal plane, and the projected length of the boom supports 2 on the horizontal plane is less than the radius of the tunnel portal. The electric hoists 5 are all located at the top of the scaffold 1, and the three transmission chains 6 on the three electric hoists 5 are respectively connected to the central support 4 and the two boom supports 2.

[0013] When the above structure is in use, the electric hoist crane 5 is fixed on the front opening above the scaffold 1. The three electric hoist cranes 5 control the vertical lifting of the elevator and the angle between the boom support 2 and the horizontal bar of the scaffold 1. By changing the angle of the boom support 2 and the position of the scaffold 1, the water drill can operate in the area within the edge 7 of the front opening.

[0014] Based on the above structure, this application also provides another structure for fixing the scaffold 1, such as... Figure 1As shown, a water drill support device for breaching the portal before a tunnel boring machine (TBM) launch includes scaffolding 1 fixed in front of the portal, two telescopic boom supports 2, a central support 4, and two electric hoists 5. The central support 4 is fixed to the scaffolding 1 at the center of the portal. One end of each of the two boom supports 2 is rotatably connected to the central support 4, and a water drill 3 is fixed to the other end of each boom support 2. The rotation trajectories of the two boom supports 2 are on the same horizontal plane. Two transmission chains 6 on the two electric hoists 5 are respectively connected to the two boom supports 2. Each boom support 2 includes a fixed frame and a telescopic frame. The fixed frame is hinged to the central support, and the telescopic frame is slidably connected to the fixed frame. The telescopic frame and the fixed frame are fixed by limiting members. The water drill 3 is fixed to the end of the telescopic frame. The above structure controls the angle between the boom support 2 and the horizontal bar of the scaffold 1 by the electric hoist crane 5, and controls the effective working length of the boom support 2 by the retraction of the boom support 2. By controlling the above two parameters, the coordinates of the water drill 3 in the area within the edge 7 of the starting gate are changed.

[0015] The embodiments of this utility model have been described in detail above, but the content is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A water drill support device for breaking down a shield launching front portal, characterized in that: The system includes a movable scaffold, two boom supports, a lift, and three electric hoists. The lift is mounted on the uprights of the scaffold and has a central support fixed to it. One end of each of the two boom supports is rotatably connected to the central support, and the other end of each boom support is fixed with a water drill. The movement trajectories of the two boom supports are on the same horizontal plane, and the projected length of each boom support on the horizontal plane is less than the radius of the front door. The electric hoists are all located at the top of the scaffold, and three drive chains on the three electric hoists are respectively connected to the central support and the two boom supports.

2. A water drill support device for breaking a shield launching pre-head, characterized in that: The system includes scaffolding fixed in front of the front doorway, two telescopic boom supports, a central support, and two electric hoists. The central support is fixed to the scaffolding at the center of the front doorway. One end of each of the two boom supports is rotatably connected to the central support, and the other end of each boom support is fixed with a water drill. The rotation trajectories of the two boom supports are on the same horizontal plane, and two transmission chains on the two electric hoists are respectively connected to the two boom supports.

3. The water drill support device for breaking the shield launching front tunnel portal according to claim 2, characterized in that: The arm span support includes a fixed frame and a telescopic frame. The fixed frame is hinged to the central support, and the telescopic frame is slidably connected to the fixed frame. The telescopic frame and the fixed frame are fixed by a limiting member, and the water drill is fixed to the end of the telescopic frame.

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