Auxiliary device for starting stage of open-type hard rock tunnel boring machine

Abstract

The utility model relates to the technical field of shield construction equipment, and discloses an auxiliary device for the starting stage of an open-type hard rock tunnel boring machine, which structurally comprises a shield body stepping seat, a supporting shoe external expansion frame, a saddle stepping base, trolley stepping supporting legs, a braiding climbing frame and a clamping rail synchronous pushing device, and is simple in structure, convenient to operate and reusable. The supporting shoe external expansion frame tightly supports the stepping hole wall, a fulcrum and balance torque are provided for cutterhead tunneling, the cost is lower compared with the mode that an external propelling device is used for providing jacking force for cutterhead propelling, installation is faster, and operation is easy. In the stepping process, the arrangement climbing frame located at the tail can enable the service arrangement to climb onto the trolley lifted by the trolley stepping supporting legs conveniently, and then the muck transportation task is completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield construction equipment technical field, concretely relates to a kind of auxiliary device for open hard rock tunnel boring machine starting stage. BACKGROUND

[0002] Shield construction equipment is a kind of large comprehensive construction equipment for tunnel engineering, and its core is shield machine. Common types of shield construction equipment include open-type shield and closed-type shield according to whether the excavation face is closed. Among them, open-type hard rock tunnel boring machine is a large tunneling equipment for hard rock stratum tunnel construction. It relies on support shoe to tighten rock wall to provide the thrust and torque reaction required for tunneling, and is suitable for hard rock tunnel construction with good rock stability and not easy to collapse.

[0003] After open-type hard rock tunnel boring machine is assembled, it needs to be transported to the reserved starting hole and step by step to the specified tunnel face to start formal tunneling operation. The prior art usually uses a sliding step device to send the cutter head to the tunnel face position. However, from the start of cutter head tunneling to the complete entry of support shoe of tunnel boring machine into the inside of tunneling tunnel, the main machine of tunnel boring machine needs to provide thrust fulcrum and balance cutter head rotation torque for cutter head tunneling. The prior art usually completes this work by setting an auxiliary jacking device. In the equipment design process, a jacking position for the jacking device needs to be reserved, and the installation and removal of the jacking device need to be completed during the stepping process, which is time-consuming and labor-intensive. Moreover, due to the large weight of the entire open-type hard rock tunnel boring machine, the power required by the jacking device is also large, which leads to the corresponding increase in volume, high equipment cost, and difficulty in transportation inside the narrow tunnel. Therefore, it is urgent to design a device that can meet the stepping requirements of open-type hard rock tunnel boring machine and be easily disassembled and transported to solve the above problems. UTILITY MODEL CONTENTS

[0004] The technical problem solved by the utility model is that the existing tunneling machine jacking device is large in size, difficult to disassemble and assemble, and difficult to transport inside the narrow tunnel.

[0005] The purpose of the utility model can be achieved by the following technical solutions.

[0006] A kind of auxiliary device for open-type hard rock tunnel boring machine starting stage, comprising:

[0007] Shield body stepping seat, the top surface profile of the shield body stepping seat is matched with the bottom of the shield of tunneling machine, and the shield body stepping seat comprises two symmetrically arranged half bodies, and the two half bodies are detachably connected;

[0008] The rail clamping synchronous pusher is provided with a clamping jaw at one end for clamping a step rail, and abuts against the shield step seat at the other end.

[0009] The saddle step base is detachably connected with a saddle of the tunneling machine and can move along the step rail.

[0010] The trolley step leg is detachably connected with a trolley of the tunneling machine and can move along the step rail.

[0011] In one scheme of the utility model, the shield step seat comprises a shield support arc plate and a step base which are fixedly connected, the shield support arc plate is arc-shaped, and a baffle is fixedly arranged at one end of the shield step seat.

[0012] In one scheme of the utility model, a plurality of support rib plates are fixedly arranged between the shield support arc plate and the step base.

[0013] In one scheme of the utility model, the saddle step base comprises a fixed plate, a reinforcing rib and a sliding wheel set, a plurality of sliding wheel sets are fixedly connected through reinforcing ribs to form a frame structure, and the fixed plate is arranged at the top end of the sliding wheel set and used for fixedly connecting and mounting the saddle.

[0014] In one scheme of the utility model, the rail clamping synchronous pusher further comprises a power source drag plate and a hydraulic station, the hydraulic station is arranged on the power source drag plate, and a connecting cable is arranged between the power source drag plate and the shield step seat.

[0015] In one scheme of the utility model, a list of climbing frames is further arranged, and the list of climbing frames is movably connected with a trolley at the tail end.

[0016] In one scheme of the utility model, a support shoe outer expansion frame is further arranged, the support shoe outer expansion frame comprises an outer arc plate, a side plate and a connecting plate, the outer arc plate is located at the outer side of the support shoe of the tunneling machine, the side plate is fixedly arranged at both ends of the arc plate, and both ends of the connecting plate are fixedly connected with the support shoe and the side plate.

[0017] In one scheme of the utility model, a plurality of transverse reinforcing members are fixedly connected to the inner wall of the outer arc plate.

[0018] In one scheme of the utility model, a plurality of anti-skid nails are fixedly arranged on the outer wall of the outer arc plate.

[0019] In one scheme of the utility model, a pressing fixing block is arranged between the side plate and the support shoe.

[0020] According to the auxiliary device for the open hard rock tunnel boring machine starting stage, at least one of the following technical effects is achieved.

[0021] The open type hard rock tunnel boring machine is lifted to a suitable height through the shield stepping seat, the supporting shoe outer expansion frame, the saddle stepping base and the trolley stepping support leg, and the shield stepping seat and the front end of the tunnel boring machine thereon are continuously moved along the pre-laid stepping track to a to-be-excavated surface through the rail clamping synchronous pusher, the whole device is simple in structure, convenient to operate and capable of being reused, the anti-skid nails are arranged on the peripheral part of the supporting shoe outer expansion frame, sliding of the supporting shoe outer expansion frame when the stepping hole wall is tightened is prevented, the working instability phenomenon is avoided, when the shield completely enters the tunnel excavated by the cutter head, the shield stepping base can be automatically detached, the dismounting steps are reduced, the working efficiency is improved, the supporting shoe outer expansion frame and the saddle stepping base are also designed as structures convenient to dismount, can be quickly dismounted after the open type hard rock tunnel boring machine steps to the corresponding position, the structure member dismounted into smaller components is also easier to carry in the narrow stepping tunnel and transported to the outside of the hole for subsequent use, the supporting shoe outer expansion frame provides the fulcrum and the balance torque for the cutter head excavation when the stepping hole wall is tightened, the cost is more low in comparison with the external pushing device for providing the thrust force for the cutter head, the installation is more rapid and easy to operate, during the stepping process, the arranged climbing frame at the tail portion can conveniently serve the trolley stepped up by the trolley stepping support leg, and complete the transportation task of the spoil, when the open type hard rock tunnel boring machine completely enters the excavated tunnel after the stepping is completed, the stepping hole and the cutter head excavation hole have a height difference, at this time, the arranged climbing frame can be used as the step for the service arranged into the tunnel interior in the normal excavation stage, so that the equipment for stepping is fully utilized, and the economy of the whole device is improved.

[0022] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0024] Figure 1 It is a kind of open type hard rock tunnel boring machine's starting device in main part structure schematic diagram;

[0025] Figure 2 It is a kind of open type hard rock tunnel boring machine's starting device in the structure schematic diagram of rear matched trolley part;

[0026] Figure 3It is a structure schematic view of a climbing frame in a starting device of an open type hard rock tunnel boring machine;

[0027] Figure 4 It is a structure schematic view of a shield stepping seat in a starting device of an open type hard rock tunnel boring machine;

[0028] Figure 5 It is a structure schematic view of a supporting shoe outer expansion frame in a starting device of an open type hard rock tunnel boring machine;

[0029] Figure 6 It is a structure schematic view of a supporting shoe outer expansion frame and a stepping hole wall supporting structure in a starting device of an open type hard rock tunnel boring machine.

[0030] Figure 7 It is a structure schematic view of a saddle frame stepping base in a starting device of an open type hard rock tunnel boring machine.

[0031] Figure 8 It is a structure schematic view of a trolley stepping support leg in a starting device of an open type hard rock tunnel boring machine.

[0032] The reference numerals in the drawing are:

[0033] 1, shield stepping seat; 101, baffle; 102, shield support arc plate; 103, stepping base plate;

[0034] 2, supporting shoe outer expansion frame; 201, outer arc plate; 202, transverse reinforcing member; 203, side plate; 204, connecting plate; 205, pressing and fixing block; 206, anti-skid nail;

[0035] 3, saddle frame stepping base; 301, fixed plate; 302, reinforcing rib; 304, sliding wheel set;

[0036] 4, trolley stepping support leg;

[0037] 5, climbing frame;

[0038] 6, rail clamping and synchronous pusher; 601, power source dragging plate; 602, hydraulic station. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] Embodiment 1

[0041] Referring to Figures 1-8 The utility model discloses a kind of auxiliary devices for open hard rock tunnel boring machine starting stage, including shield body step seat 1, brace shoe outer expansion frame 2, saddle frame step base 3, trolley step support leg 4, list climb frame 5, rail clamping synchronous pusher 6, when using, shield body step base 1 is placed below open hard rock tunnel boring machine shield, shield body step seat 1 bottom end is placed on pre-laid step track, brace shoe outer expansion frame 2 is fixed on the outside of the brace shoe of open hard rock tunnel boring machine by fixed structure (such as bolt), saddle frame step base 3 is fixed in the bottom of the saddle of open hard rock tunnel boring machine, and the bottom of saddle frame step base 3 is slidably arranged with the step track of open hard rock tunnel boring machine, trolley step support leg 4 is fixed in the bottom of each rear matching trolley of open hard rock tunnel boring machine, and it is slidably arranged with the step track of open hard rock tunnel boring machine, list climb frame 5 is located in the tail of the rear matching trolley of open hard rock tunnel boring machine, and it is rotatably connected (detachable connection, so that list climb frame 5 can move along with trolley, and can be quickly separated when needed) with the rear matching trolley of open hard rock tunnel boring machine tail by connecting piece (such as pin, latch, hook), and bottom is slidably arranged with the step track of open hard rock tunnel boring machine, rail clamping synchronous pusher 6 one end is clamped on the step track of open hard rock tunnel boring machine, and the other end is in contact with the side of shield body step seat 1 and is pressed tightly, so as to be able to drive shield body step seat 1 to move.

[0042] Example 2

[0043] As Figure 4 Shield body step seat 1 includes baffle 101, shield support arc plate 102, step bottom plate 103, step bottom plate 103 is connected and fixed shield support arc plate 102 through support rib above, is reinforced through bolt and bottom steel plate in middle part, baffle 101 is located side and is fixedly connected with the side of shield support arc plate 102 and step bottom plate 103.Shield support arc plate 102 is supported from bottom to the shield of tunnel boring machine, the reinforced portion of step bottom plate 103 bottom with bolt and steel plate can be disassembled from middle position after step ends, reduce the volume of shield body step seat 1 and facilitate transportation.At the same time, the whole base is fixedly connected and composed of plate piece to form non-solid structure, ensure the strength, reduce the weight of the whole device, facilitate disassembly and transportation.

[0044] Example 3

[0045] As Figure 5The outer expansion frame 2 of the support shoe comprises an outer arc plate 201, a transverse reinforcing member 202, a side plate 203, a connecting plate 204, and a compression fixing block 205. The outer arc plate 201 wraps the outer arc surface of the open hard rock tunnel boring machine support shoe, and a plurality of transverse reinforcing members 202 are fixed between the outer arc plate 201 and the open hard rock tunnel boring machine support shoe. The transverse reinforcing members 202 can be plate-shaped or strip-shaped structures, which are used to ensure the strength and stability of the outer arc plate 201. The upper and lower ends of the outer arc plate 201 are fixedly connected with the side plates 203, and the compression fixing blocks 205 are inserted into the intermediate positions between the side plates 203 and the open hard rock tunnel boring machine support shoe, and then the compression fixing blocks 205 are connected and fixed with the connecting plates 204 through bolts. The side plates 203 and the connecting plates 204 are connected through bolts, and the connecting plates 204 and the support shoe body are compressed and fixed through the compression fixing blocks 205, so that loosening does not occur when the step hole wall is braced, and the disassembly is also facilitated after use.

[0046] Embodiment 4

[0047] As Figure 5 During the working stroke of the bracing cylinder of the open hard rock tunnel boring machine support shoe, the outer arc plate 201 can contact and brace the hole wall of the starting hole, and the anti-skid nails 206 are fixedly welded outside the outer arc plate 201. Like the boring machine support shoe, slippage or deflection may occur when bracing the hole wall, and the anti-skid nails 206 can penetrate into the hole wall to a certain depth to improve the anti-deflection capability. In the starting stage, the size of the starting hole wall is larger than that of the formal boring hole wall, and it may be difficult for the support shoe on the boring machine to abut against the starting hole wall and provide sufficient stability. In the present application, the size of the support shoe is increased by providing the outer expansion frame 2, which provides stable support in the starting stage, and the outer expansion frame 2 is connected in a detachable manner, which can be conveniently removed after the starting stage is completed.

[0048] Embodiment 5

[0049] As Figure 7The saddle stepping base 3 comprises a fixed plate 301, a reinforcing rib 302 and a sliding wheel set 303. The fixed plate 301 is fixed to the bottom of the saddle of the open hard rock tunnel boring machine and serves as a fixed connection structure between the saddle and the base. The reinforcing rib 302 and the sliding wheel set 303 are fixed to each other to form a frame and are connected to the fixed plate 301 by bolts. The sliding wheel set 303 can comprise a supporting leg and a roller structure to reduce the resistance between the stepping track. When the next working stroke of the main push cylinder of the open hard rock tunnel boring machine needs to pull the support shoe into the tunnel, the saddle stepping base 3 is also disassembled when the support shoe expansion frame 2 is disassembled. Since the saddle stepping base 3 needs to support the main beam part of the tunnel boring machine at this time, the rear support shoe can be fully tightened downward as the support of the main beam part of the tunnel boring machine. If necessary, a pad can be added under the rear support shoe to raise the ground support point height.

[0050] Embodiment 6

[0051] As Figure 1 The rail clamping synchronous pusher 6 is matched with a hydraulic station 602 and a power source drag plate 601. The power source drag plate 601 is connected to the shield stepping base 1 through a cable, and the hydraulic station 602 is placed on the power source drag plate 601. Since the space inside the stepping hole is small and a long oil supply pipe will cause a large pressure loss, the hydraulic station 602 moving with the power source drag plate 601 can conveniently use a shorter pipe to supply pressure for the rail clamping synchronous pusher 6, and fully utilizes the space below the main beam of the tunnel boring machine.

[0052] Embodiment 7

[0053] The embodiment provides a starting method of an open hard rock tunnel boring machine starting device, comprising the following steps:

[0054] Step one: The open hard rock tunnel boring machine is pushed in the station, a starting track (stepping track) is laid on the ground of the pre-excavated stepping pilot hole, the shield stepping base 1 is pushed to a suitable position on the starting track, then the rail clamping synchronous pusher 6 clamps the starting track and continuously pushes forward under the pressure supplied by the hydraulic station 602 to drive the saddle stepping base 3 and the trolley stepping supporting leg 4 at the bottom of the rear matched trolley of the open hard rock tunnel boring machine to slide forward relative to the starting track until the cutter head of the open hard rock tunnel boring machine reaches the end of the starting hole and contacts the tunnel rock surface;

[0055] Step two: from the open hard rock tunnel boring machine cutter head and the contact with the rock face, the front tunnel needs to be excavated by the cutter head rotation, at this time, the motor in the open hard rock tunnel boring machine provides the excavation power, at the same time, the main machine part needs to provide the cutter head advancing thrust and offset the cutter head rotation torque, at this time, the open hard rock tunnel boring machine stretches the bracing cylinder to expand the bracing shoe outer frame 2 to brace the starting hole wall to provide the advancing and counter-torque force, the main bracing cylinder stretches to push the cutter head to cut, the cut stone is transported to the drop port position by the belt conveyor, and then transported to the outside of the hole by the service train, the service train can reach the drop port position of the belt conveyor along the train climbing frame 5 by setting the train climbing frame 5; after the cutter head jacks into the shield body and completely enters the excavated tunnel, the shield body step seat 1 is completely separated, at this time, it can be disassembled and transported out of the hole;

[0056] Step three: continue the operation of step two until the main push oil cylinder of the open hard rock tunnel boring machine reaches the fully stretched state, the bracing shoe is located at the tunnel entrance excavated by the cutter head, and the tunnel boring stops at this time, at this time, the hole wall in front of the bracing shoe is smaller than the step hole wall diameter, and the bracing shoe can be completely retracted into the tunnel excavated by the cutter head in the fully retracted state of the main push oil cylinder, then the bracing shoe of the open hard rock tunnel boring machine is completely retracted, and the bracing shoe outer frame 2 is disassembled; then, the main push oil cylinder is controlled to retract the bracing shoe completely into the inside of the cutter head excavation tunnel, and then the normal tunneling process of providing the fulcrum and counter-torque by the bracing shoe bracing the hole wall and providing the jacking force by the main push oil cylinder is started; during the continuous tunneling process of the cutter head forward, when each rear matched trolley reaches the initial position of the cutter head excavation tunnel, the corresponding trolley step leg 4 is removed, until the last trolley completely enters the excavation tunnel, then the train climbing frame 5 is disassembled and left at the entrance of the cutter head excavation tunnel to facilitate the train to enter and exit the excavation tunnel climbing.

[0057] The above describes one embodiment of the utility model in detail, but the content described can only be the preferred embodiment of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent change and improvement within the scope of the utility model application should still belong to the scope of the claims of the utility model.

[0058] In the description of the utility model, it is necessary to explain, the term "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relation is based on the orientation or positional relation shown in the drawing, or it is the orientation or positional relation of the utility model product when using usually placed, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the restriction of the utility model. In addition, the term "first", "second", "third" and so on are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0059] In the description of the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0060] In the description of the utility model, it is also necessary to explain that, unless otherwise specified and limited, the terms "set", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. An auxiliary device for open hard rock tunnel boring machine launch phase, characterized in that, The shield body stepping seat comprises two symmetrically arranged half bodies which are detachably connected. The rail clamping synchronous pusher is provided with a clamping jaw at one end for clamping the stepping rail, and the other end abuts against the shield body stepping seat. The saddle stepping base is detachably connected with the saddle of the tunneling machine and can move along the stepping rail. The trolley stepping leg is detachably connected with the trolley of the tunneling machine and can move along the stepping rail. The shield body stepping seat comprises a fixedly connected shield body support arc plate and a stepping bottom plate.

2. A device for assisting the initial stage of open type hard rock tunnel boring machine according to claim 1, characterized in that, The shield body support arc plate and the stepping bottom plate are fixedly provided with a plurality of support rib plates therebetween.

3. A device for assisting the initial stage of open type hard rock tunnel boring machine according to claim 2, characterized in that, The saddle stepping base comprises a fixed plate, a reinforcing rib and a sliding wheel set.

4. The auxiliary device for the initial stage of open hard rock tunnel boring machine according to claim 1, characterized in that, The fixed plate is provided with a top end of the sliding wheel set for fixedly connecting and installing the saddle.

5. The auxiliary device for the initial stage of open hard rock tunnel boring machine according to claim 1, characterized in that, The rail clamping synchronous pusher further comprises a power source drag plate and a hydraulic station.

6. An auxiliary device for open type hard rock tunnel boring machine initial stage according to claim 1, characterized in that, The hydraulic station is arranged on the power source drag plate.

7. The auxiliary device for the initial stage of open hard rock tunnel boring machine according to claim 1, characterized in that, The power source drag plate and the shield body stepping seat are provided with a connecting cable therebetween.

8. An auxiliary device for open hard rock tunnel boring machine initial stage according to claim 7, characterized in that, The list of climbing frames is movably connected with one trolley at the tail end.

9. An auxiliary device for open hard rock tunnel boring machine initial stage according to claim 8, characterized in that, The support shoe outer expansion frame comprises an outer arc plate, a side plate and a connecting plate.

10. The auxiliary device for the initial stage of open hard rock tunnel boring machine according to claim 9, characterized in that, The outer arc plate is located outside the support shoe of the tunneling machine. The side plate is fixedly arranged at both ends of the arc plate. The connecting plate is fixedly connected with the support shoe and the side plate at both ends. The outer wall of the outer arc plate is fixedly provided with a plurality of anti-skid nails. The side plate and the support shoe are provided with a compression fixing block therebetween.

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