Tunnel shield segment prestress construction equipment and implementation method thereof

Abstract

The invention discloses tunnel shield segment prestress construction equipment and an implementation method thereof, belongs to the technical field of tunnel shield segment construction, and solves the technical problem that an existing construction process is low in efficiency. The method is described. The equipment comprises a prestressed tendon blanking mechanism used for cutting coiled prestressed tendons according to a set length, performing bundle weaving to obtain prestressed tendon bundles, and coiling the prestressed tendon bundles on a reel to form a reel; the reel is used for coiling the prestressed tendon bundle into a disc; the pay-off mechanism is used for placing and transporting a reel and paying off; the bundle penetrating and tensioning all-in-one machine is installed on the walking guide rail and used for enabling the prestressed tendon bundle in the pay-off mechanism to penetrate through a prestressed duct of the prestressed duct piece; and the walking guide rails are mounted on the prestressed duct pieces and used for conveying the strand pulling and tensioning all-in-one machine to prestressed ducts of the prestressed duct pieces. The walking guide rail is installed on the prestressed duct piece, and the strand pulling and tensioning all-in-one machine is installed on the walking guide rail for strand pulling and tensioning, so that the construction efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel shield segment construction, and more particularly to tunnel shield segment prestressed construction equipment and an implementation method thereof. Background Art

[0002] Tunnel engineering is complex, dangerous, and requires high quality. During construction, it is necessary to excavate and support at the same time, and shield construction is usually used. The prestressed shield tunnel structure is mainly composed of prestressed segments, prestressed tendons, and prestressed anchors. During the shield construction process, after the prestressed segments are assembled, circumferential prestressing must be applied to ensure that the prestressed segments have independent bearing capacity, and the shield machine can carry out subsequent operations. Currently, the main construction process of circumferential prestressing is: prestressed tendon bundle insertion - installation of working anchor plates - installation of limit plates - installation of deflection supports - installation of jacks - installation of tool anchor plates - jack pre-tightening (simultaneously adjusting the angle and centering of the tensioning device) - tensioning loading - removal of the tensioning device.

[0003] The current technology for prestressed shield tunnel structures has the following shortcomings: 1. Currently, prestressed tendon bundles are mainly pushed or pulled into the prestressed channel, but the placement of raw materials and equipment requires a large amount of space. During shield construction, the shield machine already occupies most of the tunnel space. Therefore, the current bundle insertion method is not suitable for prestressed shield tunnel structures. 2. During current prestressed construction operations, mobile supports are usually required for lifting jacks and transportation, or forklifts are used for transportation directly, and hand winches are used to assist in disassembling and installing jacks. However, during prestressed construction operations in prestressed shield tunnel structures, using mobile supports to lift jacks will affect the operation of the shield machine, and using hand winches for lifting is inefficient. Therefore, the current jack lifting method is not suitable for prestressed shield tunnel structures. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One purpose of the present invention is to provide a prestressed construction equipment for tunnel shield segments.

[0005] The second purpose of the present invention is to provide a method for implementing prestressed construction equipment for tunnel shield segments.

[0006] In order to achieve the above-mentioned first object, the present invention provides a tunnel shield segment prestressing construction equipment, comprising:

[0007] The prestressed tendon cutting mechanism is used to cut the coiled prestressed tendons according to the set length, bundle them to obtain prestressed tendon bundles, and roll the prestressed tendon bundles into coils on the coils;

[0008] a coil, for coiling the prestressed tendons into a coil;

[0009] A pay-off mechanism, used for placing and transporting the reel and paying out the wire during the threading operation;

[0010] A bundle threading and tensioning machine is used to pass the prestressed tendons in the pay-off mechanism through the prestressed channels of the prestressed segments, and the bundle threading and tensioning machine is installed on the inner wall of the prestressed segments via a travel guide rail;

[0011] A walking guide rail is installed on the inner wall of the prestressed pipe segment and is used to transport the bundle threading and tensioning integrated machine to the prestressed channel of each prestressed pipe segment.

[0012] As a further improvement, the prestressed tendon unloading mechanism includes a fixed frame, a single-bar bundle threading machine, a material rack, a traction head, a dragging mechanism, and a coiling machine. The fixed frame, the single-bar bundle threading machine, and the material rack are arranged in sequence in the same straight line direction. The traction head and the dragging mechanism are located at the feeding end of the material rack, the dragging mechanism is connected to the traction head, and the coiling machine is located at the discharging end of the material rack.

[0013] Furthermore, the pay-off mechanism includes a base, and both ends of the top of the base are respectively provided with a pay-off damping mechanism for installing the reel, the top of the pay-off damping mechanism is provided with a reel cover covering the reel, and a lifting beam is provided between the tops of the two pay-off damping mechanisms.

[0014] Furthermore, the walking guide rail includes at least two interconnected guide rail units, each of the guide rail units is installed on the inner wall of a corresponding prestressed pipe segment, and the bundle threading and tensioning integrated machine is installed on the guide rail unit and can move back and forth between the guide rail units.

[0015] Furthermore, the bundle threading and tensioning integrated machine includes a traveling frame and a control module. The traveling frame is respectively provided with a push-pull bundle threading machine and a first tensioning jack. The control module is electrically connected to the oil supply system of the push-pull bundle threading machine and the first tensioning jack.

[0016] Furthermore, the push-pull bundle threading machine and the first tensioning jack are respectively located at two ends of the top of the walking frame.

[0017] Furthermore, the walking frame is provided with a manipulator for installing the push-pull beam threading machine and the first tensioning jack, respectively, and the control module is electrically connected to the manipulator.

[0018] Furthermore, a second tensioning jack and a manipulator for installing the second tensioning jack are provided at the bottom of the traveling frame, and the control module is electrically connected to the manipulator.

[0019] Furthermore, the guide rail unit includes an upper guide rail and a lower guide rail spaced apart from each other, and a first support frame connecting the upper guide rail and the lower guide rail, and a second support frame is provided on the side wall of the same side of the upper guide rail and the lower guide rail;

[0020] The walking frame includes an upper pressure plate slidably connected to the upper guide rail and a lower pressure plate slidably connected to the lower guide rail, and a connecting frame is connected between the upper pressure plate and the lower pressure plate;

[0021] The push-pull bundle threading machine and the first tensioning jack are located at both ends of the top of the upper pressure plate, the second tensioning jack is located at the bottom of the lower pressure plate, and the locking mechanism is provided between the upper guide rail and the upper pressure plate and between the lower guide rail and the lower pressure plate.

[0022] In order to achieve the above-mentioned second objective, the present invention provides a method for implementing a tunnel shield segment prestressing construction device, comprising the following steps:

[0023] Step 1: Unload the prestressed tendons. Place the coiled tendons into a fixed rack. Use a single-strand threading machine to extract the tendons and place them on the rack. Cut the tendons to the set length and use a traction head to bundle the required number of tendons for each prestressed channel to form a tendon bundle. After bundling, connect the traction head on the tendon bundle to the towing mechanism. At the same time, install the empty reel onto the reeling machine, and then secure the other end of the tendon bundle to the reel. Then, reverse the towing mechanism to straighten the tendon bundle. Finally, start the reeling machine and roll the tendon bundle into a reel while it is stretched.

[0024] Step 2. Prestressed tendon transport: Place the pay-off mechanism near the reeling machine, then remove the hoisting beam and reel cover. Next, install the reeled reel onto the pay-off damping mechanism and securely connect it. Return the reel cover and hoisting beam to their original positions. Next, hoist the pay-off mechanism into the tunnel and transport it to the work site along with the prestressed segments.

[0025] Step 3. Install the running rails on the nth ring of segments. After the prestressed segments are assembled based on the prestressed segment structure and shield tunnel construction mode, first install the second support frame on the tension anchor pad of the prestressed segment, then install the first support frame on the lifting hole of the prestressed segment, and finally install the upper and lower guide rails on the first and second support frames;

[0026] Step 4. If n = 1, hoist the bundle threading and tensioning machine and install it on the running rail; adjust the position of the bundle threading and tensioning machine so that it is aligned with the tensioning slot of the prestressed pipe segment; lock the bundle threading and tensioning machine on the running rail;

[0027] If n>1, connect the running rail of the nth ring segment to the running rail of the n-1th ring segment, move the bundle-threading and tensioning machine from the running rail of the n-1th ring segment to the running rail of the nth ring segment; adjust the position of the bundle-threading and tensioning machine so that the bundle-threading and tensioning machine is aligned with the tensioning slot of the prestressed segment; lock the bundle-threading and tensioning machine on the running rail; and remove the running rail of the n-1th ring segment;

[0028] Step 5. Prestressed tendon threading: Place the pay-off mechanism at the location of the prestressed segment to be threaded. Use the push-pull threading machine of the threading and tensioning machine to thread the traction wire through the prestressed channel. Then connect the traction wire to the traction head of the prestressed tendon. Use the push-pull threading machine to retract the traction wire. The prestressed tendon can then be threaded through the prestressed channel.

[0029] Step 6. Prestressing: After the prestressed tendons are threaded, the pulling head is removed and stored. Then, the working anchor plate and working clip are installed on the prestressed tendons. Then, the first tensioning jack or the second tensioning jack is installed on the tendon threading and tensioning machine. The prestressed tendons are tensioned to the set prestress using the first tensioning jack or the second tensioning jack. After tensioning is completed, the first tensioning jack or the second tensioning jack is removed.

[0030] Step 7. Add 1 to n and execute step 3 until all prestressed segments are fully bundled and tensioned.

[0031] Beneficial effects

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] The present invention installs the bundle threading and tensioning machine on the inner wall of the prestressed pipe segment through a walking guide rail. The bundle threading and tensioning machine integrates a push-pull bundle threading machine and a tensioning jack. The bundle is first threaded by the push-pull bundle threading machine, and then tensioned by the tensioning jack. The overall structure is compact, easy to operate, and has high construction efficiency. Moreover, the bundle threading and tensioning machine can be conveniently moved to the bundle threading position between each ring of pipe segments through the walking guide rail, which can reduce the repeated lifting of the bundle threading and tensioning machine and greatly save construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the construction equipment in the present invention;

[0035] Figure 2 Schematic diagram of the structure of the prestressed tendon blanking mechanism in the present invention;

[0036] Figure 3 Schematic diagram of the structure of the pay-off mechanism in the present invention;

[0037] Figure 4 Schematic diagram of the structure of the walking guide rail in the present invention;

[0038] Figure 5 This is a schematic diagram of the main structure of the bundle threading and tensioning integrated machine of the present invention;

[0039] Figure 6 It is a schematic diagram of the left structure of the bundle threading and tensioning integrated machine in the present invention;

[0040] Figure 7 This is a schematic diagram of the main structure of the manipulator in the present invention;

[0041] Figure 8 Schematic diagram of the left side structure of the manipulator in the present invention;

[0042] Figure 9 Schematic diagram of the top view of the manipulator in the present invention;

[0043] Figure 10 Schematic diagram of the structure of the synchronous belt transmission mechanism of the present invention;

[0044] Figure 11 This is a structural diagram of the bundle threading and tensioning machine installed on the walking guide rail;

[0045] Figure 12 This is a structural diagram of the bundle threading and tensioning machine installed on the prestressed pipe segment through a walking guide rail;

[0046] Figure 13 This is a structural diagram of the reel installed on the pay-off mechanism;

[0047] Figure 14 Schematic diagram of prestressed tendon transfer;

[0048] Figure 15 Schematic diagram of the tunnel and shield machine;

[0049] Figure 16 This is a schematic diagram of the first ring segment tensioning of the shield tunnel;

[0050] Figure 17 Schematic diagram of the tensioning of the second ring segments of the shield tunnel.

[0051] Among them: 1-prestressed tendon unloading mechanism, 2-rolled prestressed tendons, 3-prestressed tendon bundles, 4-reel, 5-pay-off mechanism, 6-strand threading and tensioning machine, 7-prestressed pipe segments, 8-travel guide rails, 9-fixed frame, 10-single strand threading machine, 11-material rack, 12-traction head, 13-dragging mechanism, 14-reeling machine, 15-base, 16-pay-off damping mechanism, 17-reel cover, 18-hanging Crossbeam, 19-guide rail unit, 20-travel frame, 21-control module, 22-push-pull bundle threading machine, 23-first tensioning jack, 24-manipulator, 25-second tensioning jack, 26-upper guide rail, 27-lower guide rail, 28-first support frame, 29-second support frame, 30-upper pressure plate, 31-lower pressure plate, 32-connecting frame, 33-locking mechanism, 34-prestressed tendons, 35 -tunnel, 36-tension anchor plate, 37-lifting hole, 38-guide cylinder, 39-screw, 40-screw pair nut, 41-limit guide pin, 42-sliding groove, 43-rotating sleeve, 44-end bearing, 45-lifting swing arm, 46-motor, 47-jack lifting ear, 48-rotating swing arm, 49-angle adjustment screw, 50-first connecting plate, 51-stable support column, 52-second connecting plate, 53-auxiliary support wheel, 54-bottom roller, 55-guide mechanism, 56-handle, 57-pressure rod, 58-handle pressure block, 59-pressure rod mounting seat, 60-synchronous belt transmission mechanism, 61-rotating pin, 62-reducer, 63-fixed mounting seat, 64-driving synchronous pulley, 65-driven synchronous pulley, 66-synchronous belt, 67-transport locomotive, 68-shield machine, 69-segment feeding machine. DETAILED DESCRIPTION

[0052] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0053] See Figures 1 to 17 , a tunnel shield segment prestressing construction equipment, comprising:

[0054] The prestressed tendon cutting mechanism 1 is used to cut the rolled prestressed tendon 2 into pieces according to the set length, bundle them into prestressed tendon bundles 3, and roll the prestressed tendon bundles 3 into coils on the coil 4;

[0055] a coil 4 for coiling the prestressed tendon 3 into a coil;

[0056] The pay-off mechanism 5 is used to place and transport the reel 4 and pay-off the wire during the threading operation;

[0057] The bundle threading and tensioning machine 6 is used to pass the prestressed tendons 3 in the pay-off mechanism 5 through the prestressed channels of the prestressed segments 7. The bundle threading and tensioning machine 6 is installed on the inner wall of the prestressed segments 7 via a travel guide rail 8.

[0058] The walking guide rail 8 is installed on the inner wall of the prestressed pipe segment 7 and is used to transport the bundle threading and tensioning integrated machine 6 to the prestressed channel of each prestressed pipe segment 7.

[0059] like Figure 2 As shown, the prestressed tendon unloading mechanism 1 includes a fixed frame 9, a single-strand threading machine 10, a material rack 11, a traction head 12, a dragging mechanism 13, and a coiling machine 14. The fixed frame 9, single-strand threading machine 10, and material rack 11 are arranged in sequence in the same straight line. The traction head 12 and dragging mechanism 13 are located at the infeed end of the material rack 11. The dragging mechanism 13 is connected to the traction head 12, and the coiling machine 14 is located at the outfeed end of the material rack 11. The single-strand threading machine 10 and the coiling machine 14 are both existing technologies and will not be described in detail here. The dragging mechanism 13 is a winch or hoist.

[0060] like Figure 3 As shown, the pay-off mechanism 5 includes a base 15, and both ends of the top of the base 15 are respectively provided with a pay-off damping mechanism 16 for installing the reel 4, and the top of the pay-off damping mechanism 16 is provided with a reel cover 17 for covering the reel 4, and a lifting beam 18 is provided between the tops of the two pay-off damping mechanisms 16. The lifting beam 18 is sleeved on the top column of the pay-off damping mechanism 16, and then the lifting beam 18 is limited by inserting a pin into the top column.

[0061] like Figure 4 As shown, the walking guide rail 8 includes at least two interconnected guide rail units 19, each guide rail unit 19 is installed on the inner wall of a prestressed pipe segment 7, and the bundle threading and tensioning integrated machine 6 is installed on the guide rail unit 19 and can move back and forth between the guide rail units 19.

[0062] like Figure 5-10 As shown, the bundle threading and tensioning integrated machine 6 includes a traveling frame 20 and a control module 21. The traveling frame 20 is respectively provided with a push-pull bundle threading machine 22 and a first tensioning jack 23. The control module 21 is electrically connected to the oil supply system of the push-pull bundle threading machine 22 and the first tensioning jack 23.

[0063] The push-pull beam threading machine 22 and the first tensioning jack 23 are respectively located at the two ends of the top of the traveling frame 20.

[0064] The traveling frame 20 is provided with a manipulator 24 for installing the push-pull beam threading machine 22 and the first tensioning jack 23. The control module 21 is electrically connected to the manipulator 24. The manipulator 24 can adjust the height and angle of the push-pull beam threading machine 22 and the first tensioning jack 23 to adapt to different construction environments.

[0065] A second tensioning jack 25 and a manipulator 24 for installing the second tensioning jack 25 are provided at the bottom of the traveling frame 20 , and the control module 21 is electrically connected to the manipulator 24 .

[0066] The first and second tensioning jacks 23 and 25 have identical structures and can share a common oil supply system. The first and second tensioning jacks 23 and 25 are located at the top and bottom of the traveling frame 20, respectively, to accommodate tensioning operations at different anchor points (the anchor points of different tunnel segments may be at different heights).

[0067] The guide rail unit 19 includes an upper guide rail 26 and a lower guide rail 27 spaced apart from each other, and a first support frame 28 connecting the upper guide rail 26 and the lower guide rail 27 . A second support frame 29 is provided on the side wall of the upper guide rail 26 and the lower guide rail 27 on the same side.

[0068] The traveling frame 20 includes an upper pressure plate 30 slidably connected to the upper guide rail 26 and a lower pressure plate 31 slidably connected to the lower guide rail 27 . A connecting frame 32 is connected between the upper pressure plate 30 and the lower pressure plate 31 .

[0069] The push-pull bundle threading machine 22 and the first tensioning jack 23 are located at both ends of the top of the upper pressure plate 30, the second tensioning jack 25 is located at the bottom of the lower pressure plate 31, and a locking mechanism 33 is provided between the upper guide rail 26 and the upper pressure plate 30, and between the lower guide rail 27 and the lower pressure plate 31. Figure 11 The figure shows the structure of the bundle threading and tensioning machine installed on the walking guide rail.

[0070] Specifically, the manipulator 24 includes a guide cylinder 38, in which a screw 39 is rotatably provided. Preferably, the screw 39 is a ball screw, and the screw 39 is provided with a screw pair nut 40. The screw pair nut 40 is connected to a limit guide pin 41. The guide cylinder 38 is provided with a sliding groove 42 arranged along its axial direction. The limit guide pin 41 slides through the sliding groove 42. The outer wall of the guide cylinder 38 is provided with a rotating sleeve 43. The rotating sleeve 43 is connected to the limit guide pin 41 through an end bearing 44. The rotating sleeve 43 is provided with a lifting swing arm 45. One end of the guide cylinder 38 is provided with a motor 46 for driving the screw 39 to rotate. The control module 21 is electrically connected to the motor 46. Preferably, the motor 46 is installed at the top of the guide cylinder 38 and drives the screw 39 to rotate through the reducer 62. The motor 46 drives the screw 39 to rotate. Under the action of the limiting guide pin 41, the screw nut 40 moves up and down, thereby driving the rotating sleeve 43 to move up and down. The rotating sleeve 43 can rotate 360 ​​degrees around the guide cylinder 38, so that the lifting swing arm 45 can rotate 360 ​​degrees along the axis of the guide cylinder 38.

[0071] The push-pull beam threading machine 22 is mounted on the corresponding lifting arm 45 of the manipulator 24 via a rotating arm 48, so that the height and angle of the push-pull beam threading machine 22 can be adjusted. The rotating arm 48 is rotatably mounted on the lifting arm 45 via a rotating pin 61.

[0072] The first tensioning jack 23 is provided with a jack lug 47, which is rotatably mounted to the lifting arm 45 of the manipulator 24 corresponding to the first tensioning jack 23 via a rotating swing arm 48. Specifically, the rotating swing arm 48 is rotatably mounted to the lifting arm 45 via a rotating pin 61. The rotating swing arm 48 is provided with an angle adjustment screw 49 for adjusting the horizontal angle of the jack lug 47. The jack lug 47 is L-shaped, with one end of the jack lug 47 connected to the first tensioning jack 23 and the other end of the jack lug 47 rotatably connected to the rotating swing arm 48. The angle adjustment screw 49 is threadedly connected to the rotating swing arm 48, with one end of the angle adjustment screw 49 directed toward the bent portion of the jack lug 47. The angle adjustment screw 49 allows for convenient adjustment of the horizontal angle of the jack lug 47 to accommodate different tensioning jack models and installation horizontal angle requirements.

[0073] The manipulators 24 are mounted on the traveling frame 20 via a fixed mounting base 63 . A first connecting plate 50 is provided between the tops of the two manipulators 24 to improve the stability of the two manipulators 24 .

[0074] The connecting pulling method of the second tensioning jack 25 and the manipulator 24 is the same as that of the first tensioning jack 23 and the manipulator 24. The motor 46 of the manipulator 24 of the second tensioning jack 25 is installed on the top of the guide cylinder 38 and drives the lead screw 39 through a synchronous belt transmission mechanism 60. The synchronous belt transmission mechanism 60 includes a driving synchronous pulley 64 connected to the motor 46 (or the reducer 62), a driven synchronous pulley 65 connected to the lead screw 39, and a synchronous belt 66 connecting the driving synchronous pulley 64 and the driven synchronous pulley 65.

[0075] The manipulator 24 on which the second tensioning jack 25 is installed is located at one end of the bottom of the walking frame 20, and a stabilizing support column 51 is provided at the other end of the bottom of the walking frame 20. A second connecting plate 52 is provided between the stabilizing support column 51 and the top of the manipulator 24 on which the second tensioning jack 25 is installed, which can improve the stability of the manipulator 24.

[0076] Furthermore, the second connecting plate 52 is provided with auxiliary support wheels 53 , which can reduce the load on the upper guide rail 26 and the lower guide rail 27 , and also improve the stability of the movement of the walking frame 20 .

[0077] Specifically, the upper bearing plate 30 is provided with a bottom roller 54 and a guide mechanism 55 that contact the upper guide rail 26. Correspondingly, the lower bearing plate 31 is provided with a bottom roller 54 and a guide mechanism 55 that contact the lower guide rail 27. Both the upper guide rail 26 and the lower guide rail 27 are I-beam structures. The bottom roller 54 is located inside the upper and lower guide rails 26 and 27. The guide mechanism 55 includes two guide wheels that contact the sidewalls of the upper and lower guide rails 26 and 27, respectively.

[0078] In one embodiment, the locking mechanism 33 adopts an eccentric clamping mechanism, such as the eccentric clamping mechanism including a handle 56, a pressure rod 57, a handle pressure block 58, and a pressure rod mounting seat 59. The pressure rod mounting seat 59 is mounted on the upper pressure plate 30 and the lower pressure plate 31. The pressure rod 57 is mounted on the pressure rod mounting seat 59. The lower end of the pressure rod 57 passes downward through the pressure plate 30 and the lower pressure plate 31. The lower end of the pressure rod 57 is connected to the handle pressure block 58. The lower end of the handle 56 is rotatably connected to the pressure rod mounting seat 59. The lower end of the handle 56 is provided with an eccentric cam. When the handle 56 is pressed downward, the eccentric cam drives the pressure rod 57 to move downward and self-lock. The handle pressure block 58 directly presses the walking guide rail 8, thereby positioning and fixing the walking frame and preventing the walking frame from moving accidentally. Of course, the eccentric clamping mechanism can also be an existing mature structure.

[0079] Of course, in other embodiments, the locking mechanism 33 may also be a tightening bolt or a switch magnet seat (similar to the switch magnet seat used for a dial indicator).

[0080] The first tensioning jack 23 and the second tensioning jack 25 are conventional prestressed tensioning construction hydraulic tensioning jacks, which will not be described here.

[0081] The push-pull bundle threading machine 22 is an existing mature special equipment for prestressed tendon bundle threading, and has the characteristics of miniaturization and lightweight, which will not be described here.

[0082] A method for implementing prestressed construction equipment for tunnel shield segments comprises the following steps:

[0083] Step 1. Prestressed tendon cutting: Place the rolled prestressed tendon 2 (e.g., rolled steel strand) into the fixed rack 9, use the single strand threading machine 10 to extract the prestressed tendon 34, and place it on the material rack 11; After cutting the prestressed tendon 34 according to the set length, use the traction head 12 to bundle the number of prestressed tendons required for each prestressed channel to obtain the prestressed tendon bundle 3; After bundling is completed, connect the traction head 12 on the prestressed tendon bundle 3 to the dragging mechanism 13, and at the same time, install the empty reel 4 on the coiling machine 14, and then fix the other end of the prestressed tendon bundle 3 to the reel 4; then reverse the dragging mechanism 13 to straighten the prestressed tendon bundle 3, and finally start the coiling machine 14 to roll the prestressed tendon bundle 3 into a coil in the straightened state (when the dragging mechanism 13 rotates forward, it has a certain damping force, which can keep the prestressed tendon bundle in a straightened state);

[0084] Step 2. Prestressed tendon transport: Place the pay-off mechanism 5 near the coiling machine 14, then remove the hoisting beam 18 and the reel cover 17; then install the coiled reel 4 onto the pay-off damping mechanism 16 and connect them firmly, and install the reel cover 17 and the hoisting beam 18 back to their original positions; then hoist the pay-off mechanism 5 into the tunnel 35 and transport it to the working site along with the prestressed segment 7, such as Figure 14As shown, the prestressed segments 7 and the pay-off mechanism 5 are transported to the operation site by a transport locomotive 67;

[0085] Step 3. Install the walking guide rail 8 on the nth ring segment (the initial value of n is 1). After the prestressed segment 7 is assembled based on the prestressed segment structure and the shield tunnel construction mode, first install the second support frame 29 on the tension anchor plate 36 of the prestressed segment 7, then install the first support frame 28 on the hoisting hole 37 of the prestressed segment 7, and finally install the upper guide rail 26 and the lower guide rail 27 on the first support frame 28 and the second support frame 29. Figure 16 As shown;

[0086] Step 4. If n = 1, hoist the bundle-threading and tensioning machine 6 and install it on the running rail 8; adjust the position of the bundle-threading and tensioning machine 6 so that it is aligned with the tensioning slot of the prestressed segment 7; lock the bundle-threading and tensioning machine 6 on the running rail 8;

[0087] If n>1, after connecting the running guide rail 8 of the n-th ring segment to the running guide rail 8 of the n-1th ring segment, move the bundle-threading and tensioning integrated machine 6 from the running guide rail 8 of the n-1th ring segment to the running guide rail 8 of the n-th ring segment; adjust the position of the bundle-threading and tensioning integrated machine 6 so that the bundle-threading and tensioning integrated machine 6 is aligned with the tensioning notch of the prestressed segment 7; lock the bundle-threading and tensioning integrated machine 6 on the running guide rail 8; remove the running guide rail 8 of the n-1th ring segment for installation in the next ring segment;

[0088] Step 5. Prestressed tendon bundle, place the pay-off mechanism 5 to the position of the prestressed segment 7 that needs to be bundled, such as Figure 15 As shown, the pay-off mechanism 5 is placed at the position of the prestressed segment 7 that needs to be bundled by the segment feeder 69 of the shield machine 38; the push-pull bundle threading machine 22 of the bundle threading and tensioning integrated machine 6 is used to pass the traction wire through the prestressed channel (the position of the push-pull bundle threading machine 22 can be adjusted by the manipulator 24 to align it with the prestressed channel), such as passing the traction wire into the channel from the upper end of the channel and out from the lower end of the channel, and then connecting the traction wire with the traction head 12 of the prestressed tendon bundle 3, and using the push-pull bundle threading machine 22 to retract the traction wire to drag the prestressed tendon bundle 3, the prestressed tendon bundle 3 can be passed through the prestressed channel;

[0089] Step 6. Prestressed tensioning. After the prestressed tendon 3 is threaded through the bundle, the traction head 12 is disassembled and stored, and then the working anchor plate and the working clip are installed on the prestressed tendon 3; then the first tensioning jack 23 or the second tensioning jack 25 is installed on the bundle threading and tensioning integrated machine 6 (the specific method can be determined according to the threading direction (i.e., the tensioning end), and the one closer to the threading direction is installed); the prestressed tendon 3 is tensioned to the set prestress by the first tensioning jack 23 or the second tensioning jack 25, and the first tensioning jack 23 or the second tensioning jack 25 is disassembled after the tensioning is completed (for the convenience of subsequent cable cutting and anti-corrosion operations); of course, when the prestress to be tensioned is large, the first tensioning jack 23 and the second tensioning jack 25 can be installed at the same time, and the first tensioning jack 23 and the second tensioning jack 25 can be used for tensioning at the same time;

[0090] Step 7. n is increased by 1, and step 3 is executed until all prestressed segments 7 are completely bundled and tensioned.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A tunnel shield segment prestressing construction equipment, characterized in that: include: A prestressed tendon cutting mechanism (1) is used for cutting a rolled prestressed tendon (2) according to a set length, bundling the prestressed tendon bundle (3), and rolling the prestressed tendon bundle (3) into a coil on a coil (4); A coil (4) for coiling the prestressed tendon (3) into a coil; A pay-off mechanism (5) is used for placing and transporting the reel (4) and for paying out the wire during the threading operation; A bundle-threading and tensioning integrated machine (6) is used to pass the prestressed tendon bundle (3) in the pay-off mechanism (5) through the prestressed channel of the prestressed pipe segment (7); the bundle-threading and tensioning integrated machine (6) is installed on the inner wall of the prestressed pipe segment (7) via a walking guide rail (8); A walking guide rail (8) is installed on the inner wall of the prestressed pipe segment (7) and is used to transport the bundle-threading and tensioning integrated machine (6) to the prestressed duct of each prestressed pipe segment (7).

2. The tunnel shield segment prestressing construction equipment according to claim 1, characterized in that: The prestressed tendon unloading mechanism (1) comprises a fixed frame (9), a single-strand bundle threading machine (10), a material rack (11), a traction head (12), a dragging mechanism (13), and a coiling machine (14); the fixed frame (9), the single-strand bundle threading machine (10), and the material rack (11) are arranged in sequence in the same straight line direction; the traction head (12) and the dragging mechanism (13) are located at the feeding end of the material rack (11); the dragging mechanism (13) is connected to the traction head (12); and the coiling machine (14) is located at the discharging end of the material rack (11).

3. The tunnel shield segment prestressing construction equipment according to claim 1, characterized in that: The pay-off mechanism (5) comprises a base (15), and both ends of the top of the base (15) are respectively provided with a pay-off damping mechanism (16) for mounting the reel (4), and the top of the pay-off damping mechanism (16) is provided with a reel cover (17) for covering the reel (4), and a hoisting beam (18) is provided between the tops of the two pay-off damping mechanisms (16).

4. The tunnel shield segment prestressing construction equipment according to claim 1, characterized in that: The travel guide rail (8) comprises at least two mutually connected guide rail units (19), each of the guide rail units (19) being mounted on the inner wall of a corresponding prestressed pipe segment (7), and the bundle threading and tensioning integrated machine (6) being mounted on the guide rail unit (19) and capable of reciprocating between the guide rail units (19).

5. The tunnel shield segment prestressing construction equipment according to claim 4, characterized in that: The bundle threading and tensioning integrated machine (6) comprises a traveling frame (20) and a control module (21); the traveling frame (20) is respectively provided with a push-pull bundle threading machine (22) and a first tensioning jack (23); the control module (21) is electrically connected to the oil supply systems of the push-pull bundle threading machine (22) and the first tensioning jack (23).

6. The tunnel shield segment prestressing construction equipment according to claim 5, characterized in that: The push-pull beam threading machine (22) and the first tensioning jack (23) are respectively located at two ends of the top of the walking frame (20).

7. The tunnel shield segment prestressing construction equipment according to claim 5 or 6, characterized in that: The walking frame (20) is provided with a manipulator (24) for installing the push-pull beam threading machine (22) and the first tensioning jack (23), and the control module (21) is electrically connected to the manipulator (24).

8. The tunnel shield segment prestressing construction equipment according to claim 6, characterized in that: A second tensioning jack (25) and a manipulator (24) for installing the second tensioning jack (25) are provided at the bottom of the walking frame (20), and the control module (21) is electrically connected to the manipulator (24).

9. The tunnel shield segment prestressing construction equipment according to claim 8, characterized in that: The guide rail unit (19) includes an upper guide rail (26) and a lower guide rail (27) spaced apart from each other, and a first support frame (28) connecting the upper guide rail (26) and the lower guide rail (27), and a second support frame (29) is provided on the side walls on the same side of the upper guide rail (26) and the lower guide rail (27); The walking frame (20) includes an upper pressure plate (30) slidably connected to the upper guide rail (26) and a lower pressure plate (31) slidably connected to the lower guide rail (27), and a connecting frame (32) is connected between the upper pressure plate (30) and the lower pressure plate (31); The push-pull bundle threading machine (22) and the first tensioning jack (23) are located at both ends of the top of the upper pressure plate (30), and the second tensioning jack (25) is located at the bottom of the lower pressure plate (31). The locking mechanism (33) is provided between the upper guide rail (26) and the upper pressure plate (30) and between the lower guide rail (27) and the lower pressure plate (31).

10. A method for implementing prestressed construction equipment for tunnel shield segments, characterized in that: The following steps are involved: Step 1. Cutting the prestressed tendons, placing the rolled prestressed tendons (2) into the fixed frame (9), using a single-strand threading machine (10) to extract the prestressed tendons (34), and placing them on the material rack (11); after cutting the prestressed tendons (34) according to the set length, use the traction head (12) to bundle the number of prestressed tendons required for each prestressed channel to obtain a prestressed tendon bundle (3); after bundling is completed, the traction head (12) on the prestressed tendon bundle (3) is connected to the dragging mechanism (13), and at the same time, the empty reel (4) is installed on the coiling machine (14), and the other end of the prestressed tendon bundle (3) is fixed to the reel (4); then the dragging mechanism (13) is reversed to straighten the prestressed tendon bundle (3), and finally the coiling machine (14) is started to roll the prestressed tendon bundle (3) into a coil in the straightened state; Step 2. Prestressed tendon transport, the pay-off mechanism (5) is placed near the coiling machine (14), and the hoisting beam (18) and the reel cover (17) are disassembled; then the reel (4) that has been coiled is installed on the pay-off damping mechanism (16), and the connection is secure, and the reel cover (17) and the hoisting beam (18) are installed back to their original positions; then the pay-off mechanism (5) is hoisted into the tunnel (35), and the prestressed segment (7) is transported to the working site; Step 3. After the n-th ring segment is installed with the walking guide rail (8), the prestressed segment (7) is assembled based on the prestressed segment structure and the shield tunnel construction mode, the second support frame (29) is first installed on the tension anchor plate (36) of the prestressed segment (7), and then the first support frame (28) is installed on the hoisting hole (37) of the prestressed segment (7), and finally the upper guide rail (26) and the lower guide rail (27) are installed on the first support frame (28) and the second support frame (29); Step 4. If n=1, hoist the bundle-threading and tensioning integrated machine (6) and install it on the walking guide rail (8); adjust the position of the bundle-threading and tensioning integrated machine (6) so that the bundle-threading and tensioning integrated machine (6) is aligned with the tensioning notch of the prestressed pipe segment (7); lock the bundle-threading and tensioning integrated machine (6) on the walking guide rail (8); If n>1, after connecting the running guide rail (8) of the n-th ring segment to the running guide rail (8) of the n-1th ring segment, move the bundle-threading and tensioning integrated machine (6) from the running guide rail (8) of the n-1th ring segment to the running guide rail (8) of the n-th ring segment; adjust the position of the bundle-threading and tensioning integrated machine (6) so that the bundle-threading and tensioning integrated machine (6) and the tensioning notch of the prestressed segment (7) are aligned; lock the bundle-threading and tensioning integrated machine (6) on the running guide rail (8); and remove the running guide rail (8) of the n-1th ring segment; Step 5. Prestressed tendon bundle threading: Place the pay-off mechanism (5) at the position of the prestressed tube segment (7) to be threaded; Use the push-pull threading machine (22) of the threading and tensioning machine (6) to thread the traction wire through the prestressed channel, then connect the traction wire to the traction head (12) of the prestressed tendon bundle (3), and use the push-pull threading machine (22) to retract the traction wire, and then the prestressed tendon bundle (3) can be passed through the prestressed channel; Step 6. Prestressed tensioning: After the prestressed tendon bundle (3) is threaded, the traction head (12) is disassembled and stored, and then the working anchor plate and the working clip are installed on the prestressed tendon bundle (3); then the first tensioning jack (23) or the second tensioning jack (25) is installed on the threading and tensioning integrated machine (6); the prestressed tendon bundle (3) is tensioned to the set prestress by the first tensioning jack (23) or the second tensioning jack (25), and the first tensioning jack (23) or the second tensioning jack (25) is disassembled after the tensioning is completed; Step 7. n is accumulated by 1, and step 3 is executed until all prestressed pipe segments (7) are completely bundled and tensioned.

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