A construction device and construction method for a cable-stayed bridge section using temporary cables

Abstract

The present invention discloses a construction device and a construction method of a cable-stayed bridge section using temporary cables, which comprises two rows of Bailey beams, which are respectively used to be installed at both ends of the zero block, one end of the Bailey beam is used to be fixed to the zero block through a connecting piece, and the other end is used to extend outside the first block, and the Bailey beams in the same row are used to be arranged at intervals along the width direction of the bridge deck; a working platform is fixedly installed on the top of the Bailey beams in the same row, and a lifting member for lifting the beam section is fixedly installed on the working platform. The present application has the effect of improving the overall work efficiency and reducing safety hazards.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and in particular to a construction device for a cable-stayed bridge section using temporary cables and a construction method thereof. Background Art

[0002] At present, the cable-stayed bridge is a bridge in which the main tower is directly pulled on the main tower by many inclined cables. It is a structural system composed of pressure-bearing towers, tension cables and bending beams. It can be regarded as a multi-span elastically supported continuous beam with inclined cables replacing piers. It can reduce the bending moment in the beam body, lower the building height, reduce the structural weight and save materials.

[0003] Existing main beam block at the top of main tower of cable-stayed bridge is called block No. 0, and beam sections connected to both ends of block No. 0 are called blocks No. 1. After block No. 0 and block No. 1 are built with tower crane, block No. 2 is far away from tower crane and difficult to be hoisted by tower crane. Therefore, it is necessary to install bridge crane on block No. 0 and block No. 1, and then hoist block No. 2 at the positions of two blocks No. 1 in turn.

[0004] With regard to the above-mentioned related technologies, the bridge crane occupies a large area, and it is impossible to simultaneously set up the bridge crane at both ends to lift the prefabricated truncated beam. Moreover, if the second beam is cast at only one end, there will be an imbalance at both ends and a tendency to twist, posing a safety hazard. Summary of the invention

[0005] In order to improve overall work efficiency and reduce potential safety hazards, the present application provides a cable-stayed bridge section construction device and a construction method thereof using temporary cables.

[0006] In the first aspect, the present application provides a construction device for a cable-stayed bridge section using temporary cables, which adopts the following technical solution:

[0007] A construction device for a cable-stayed bridge section using temporary cables comprises two rows of Bailey beams, wherein the two rows of Bailey beams are respectively used to be installed at the two ends of the No. 0 block, one end of the Bailey beam is used to be fixed to the No. 0 block through a connecting piece, and the other end is used to extend out of the No. 1 block, and the Bailey beams in the same row are used to be arranged at intervals along the width direction of the bridge deck; a working platform is fixedly installed on the top of the Bailey beams in the same row, and a lifting member for lifting the beam section is fixedly installed on the working platform.

[0008] By adopting the above technical scheme, two rows of Bailey beams are lifted to the two end positions of block No. 0 in sequence by a tower crane, and the Bailey beams of the same row are arranged at intervals along the width of the bridge deck, with one end of each Bailey beam fixedly installed on block No. 0 and the other end extending out of block No. 1; when block No. 2 needs to be built, the lifting members at both ends can simultaneously lift block No. 2 to the position corresponding to block No. 1, and then connect block No. 2 and block No. 1; in this structure, since the Bailey beam occupies a small area, block No. 2 can be simultaneously lifted at both ends of block No. 0, which can not only greatly improve work efficiency, but also balance the forces on both sides, reduce torsion and reduce installation risks.

[0009] Preferably, anchors are provided in the Bailey beams in the same row, and temporary cables are fixedly connected to the anchors. The temporary cables are far away from one end connected to the anchors and are used for anchoring connection with the main tower.

[0010] By adopting the above technical solution, when the lifting member on the working platform lifts the beam section, the gravity borne by the Bailey beams in the same row will increase. Through the action of the temporary cable, the temporary cable will share the gravity borne by the Bailey beams to the main tower through the connection at both ends, thereby effectively improving the bearing capacity of the Bailey beams and making it safer and more stable.

[0011] Preferably, a connecting frame is provided at one end of the Bailey beam used to be fixed on the zero block, and two rows of Bailey beams used to be fixed on one end of the zero block are fixedly connected via the connecting frame.

[0012] By adopting the above technical solution, when the lifting member lifts the beam section, the portion of the Bailey beam extending out of block No. 1 will have a tendency to twist, that is, the portion of the Bailey beam extending out of block No. 1 will have a tendency to tilt downward. By connecting the two rows of Bailey beams through the rear connecting frame, a tensioning force can be generated to resist the twisting tendency, thereby improving the bearing capacity while ensuring operation safety.

[0013] Preferably, the connecting member includes: an anchor screw preset on block No. 0 and corresponding to the position of each Bailey beam and an anchor nut threadedly mounted on the anchor screw, the anchor screw passes through the Bailey beam, and the anchor nut abuts against the top of the Bailey beam.

[0014] By adopting the above technical solution, one end of each Bailey beam corresponding to the zero block is passed through the anchor screw, and then the anchor nut is screwed into the anchor screw to complete the fixation of the Bailey beam; the installation is simple and its stability is high.

[0015] Preferably, tracks are laid directly below the Bailey beams in the same row and at the position of block No. 1, and a base is slidably installed on the track, and a first baffle and a second baffle are provided on the base, and the first baffle and the second baffle are respectively located on both sides of the sliding direction of the base, and the first baffle is fixedly installed on the base; the second baffle is hinged to the base, and the rotating shaft sleeve of the second baffle is provided with a torsion spring, and the two ends of the torsion spring are respectively connected to the second baffle and the base; the base is installed with a limiter for limiting the rotation position of the second baffle; the track is installed with a driving component for driving the base to slide.

[0016] By adopting the above technical solution, when hoisting the Bailey beam crane, the Bailey beam can be accurately placed at the corresponding position through the guidance of the first baffle and the second baffle, and the anchor screw is passed through the Bailey beam; then the restraint on the second baffle is loosened through the limiter, the drive assembly is started, and the base is pulled to rotate the second baffle, and the second baffle slides from the position between the Bailey beam and the first block; when the second baffle leaves the Bailey beam position, the second baffle is reset by the action of the torsion spring until the first baffle and the second baffle move to the next Bailey beam installation position, and the next Bailey beam is positioned and installed; the above process only requires the drive assembly to drive the base to slide so that the first baffle and the second baffle can be moved to the installation position of each Bailey beam, and the operator only needs to release the limiter, which is easy to operate and has high construction efficiency.

[0017] Preferably, guide plates are provided at the top ends of the first baffle plate and the second baffle plate, and the two guide plates extend from the first baffle plate or the second baffle plate in directions away from each other.

[0018] By adopting the above technical solution, when the Bailey beam is hoisted to the position between the two guide plates, the guiding effect of the guide plates can accurately guide the Bailey beam to the point where the anchor screw can pass through the Bailey beam, thereby improving the installation efficiency of the Bailey beam.

[0019] Preferably, the track includes: a plurality of segments arranged along the length direction, the plurality of segments are sequentially nested and slidably arranged, and each of the segments is detachably connected to block No. 1 through a positioning piece; a plurality of positioning grooves are spaced apart along the length direction on the track, and a clamping block is installed at one end of the guide plate located on the second baffle away from the second baffle; when the second baffle rotates to a position corresponding to the gap between the Bailey beam and block No. 1, the clamping block is inserted into the positioning groove.

[0020] By adopting the above technical solution, when the base is pulled to drive the second baffle to rotate, the locking block can be inserted into the locking groove, and then the restraint of the corresponding segment is released, so that when the base continues to be pulled, the corresponding segment can be driven to slide together, so that the segment is partially retracted into the adjacent segment, shortening the length of the entire track; every time the positioning of a Bailey beam is completed and the base is driven to move, the purpose of shortening the entire track can be achieved; so that after all the Bailey beams are positioned, the track can be easily removed.

[0021] Preferably, the driving assembly includes: a winding shaft rotatably mounted at one end of the track, a driving member for driving the winding shaft to rotate, and a pull rope wound on the winding shaft, wherein one end of the pull rope away from the winding shaft is connected to the base.

[0022] By adopting the above technical solution, the driving component is started to reel in the pull rope, thereby pulling the base to slide on the track. The driving structure can complete the recovery after completing the positioning of all Bailey beams, without the need to dismantle the entire driving structure such as the screw rod, thereby improving the disassembly and assembly efficiency.

[0023] Preferably, the limiting member comprises: a locking plate and a locking bolt, the locking plate is rotatably mounted on the base, the locking bolt passes through the locking plate and is threadedly mounted on the second baffle; the base is provided with a receiving groove for the locking plate to be rotated into.

[0024] By adopting the above technical solution, when the base completes the movement, the locking plate is rotated, and then the locking plate is connected to the second baffle through the locking bolt to complete the locking of the second baffle; the structure is simple and easy to operate.

[0025] In the second aspect, the present application provides a method for constructing a cable-stayed bridge section, which adopts the following technical solution:

[0026] A cable-stayed bridge section construction method, based on the cable-stayed bridge section construction device using temporary cables, the construction method comprises:

[0027] Step 1: Lay the track so that the first baffle and the second baffle correspond to the position of the first Bailey beam;

[0028] Step 2: Hang the Bailey beam between the first baffle plate and the second baffle plate, and allow the anchor screw to pass through the Bailey beam;

[0029] Step 3: Keep the Bailey beam in a suspended state, loosen the restraint on the second baffle, pull the base, and through the resistance of the Bailey beam, make the second baffle rotate until the clamping block is clamped into the clamping groove, driving the segment where the clamping groove is located to move together; then fix the Bailey beam through the anchor nut;

[0030] Step 4: Lift and secure the remaining Bailey beams in sequence, and then tie temporary cables;

[0031] Step 5: Remove the track and install the working platform.

[0032] By adopting the above technical solution, the track is laid before installing the Bailey beam. When the Bailey beam is hoisted to the corresponding position, the Bailey beam can be accurately positioned through the action of the first baffle and the second baffle, and the anchor screw can be accurately passed through the Bailey beam. After completing the positioning of one Bailey beam, the first baffle and the second baffle can be placed in the assembly position of the next Bailey beam only by pulling the base, which is easy to operate and has high construction efficiency.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. The tower crane lifts two rows of Bailey beams to the two ends of block 0 in sequence. The Bailey beams in the same row are arranged at intervals along the width of the bridge deck. One end of each Bailey beam is fixedly installed on block 0, and the other end extends out of block 1. When block 2 needs to be built, the lifting members at both ends can simultaneously lift block 2 to the position corresponding to block 1, and then connect block 2 and block 1. In this structure, since the Bailey beam occupies a small area, block 2 can be simultaneously lifted at both ends of block 0, which can not only greatly improve work efficiency, but also balance the forces on both sides, reduce torsion and reduce installation risks;

[0035] 2. The first baffle and the second baffle can be moved to the installation position of each Bailey beam only by driving the base to slide through the driving assembly, and the operator only needs to release the limiter, which is easy to operate and has high construction efficiency;

[0036] 3. When the base is pulled to drive the second baffle to rotate, the clamping block can be inserted into the clamping groove, and then the restraint of the corresponding segment is released. When the base is continued to be pulled, the corresponding segment can be driven to slide together, so that the segment is partially retracted into the adjacent segment, shortening the length of the entire track; every time a Bailey beam is positioned and the base is driven to move, the purpose of shortening the entire track can be achieved; so that after all the Bailey beams are positioned, the track can be easily removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0038] Figure 2 yes Figure 1 A partial enlarged view of middle A.

[0039] Figure 3 It is a schematic diagram of the base of an embodiment of the present application moving on the track.

[0040] Figure 4 yes Figure 3 A partial enlarged view of B.

[0041] Figure 5 It is a flow chart of the construction method of an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 1. Bailey beam; 11. Anchor; 12. Temporary cable; 13. Anchor screw; 14. Anchor nut; 2. Connecting frame; 3. Working platform; 4. Lifting member; 5. Track; 51. Segment; 52. Positioning slot; 6. Base; 61. First baffle plate; 62. Second baffle plate; 63. Guide plate; 64. Snap-in block; 65. Limiting member; 651. Locking plate; 652. Locking bolt; 66. Drive assembly; 661. Reel; 662. Pull rope; 663. Drive member; 67. Receiving slot; 101. Main tower of cable-stayed bridge; 102. Block No. 0; 103. Block No. 1. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-5 This application is described in further detail.

[0045] The main beam block at the top of the main tower of the cable-stayed bridge is called block No. 0, the beam sections connected to both ends of block No. 0 are called blocks No. 1, and the beam section installed on the end of block No. 1 away from block No. 0 is called block No. 2.

[0046] The present application embodiment discloses a cable-stayed bridge section construction device using temporary cables. Figure 1 The cable-stayed bridge section construction device includes two rows of Bailey beams 1, which are respectively used to be installed on the two ends of the zero block 102, one end of the Bailey beam 1 is used to be fixed to the zero block 102 through a connecting piece, and the other end is used to extend out of the first block 103, and the Bailey beams 1 in the same row are used to be arranged at intervals along the width direction of the bridge deck; an anchor 11 is fixedly installed in each Bailey beam 1, and the anchor 11 is fixedly connected with a temporary cable 12, and the temporary cable 12 is used to be anchored on the main tower 101 of the cable-stayed bridge at one end away from the anchor 11; the two rows of Bailey beams 1 are arranged in a one-to-one correspondence, and a connecting frame 2 is arranged between the ends of the two corresponding Bailey beams 1 that are close to each other, and the two ends of the connecting frame 2 are respectively fixedly connected to the corresponding two Bailey beams 1, so as to further improve the overall stability of the two rows of Bailey beams 1.

[0047] A working platform 3 is fixedly installed at the top of the same row of Bailey beams 1 and at one end corresponding to the end extending outside the No. 1 block 103, and a lifting member 4 for lifting the beam section is fixedly installed on the working platform 3; in the present embodiment, the lifting member 4 is a plurality of through-type jacks; thereby, the No. 2 blocks at both ends can be lifted to the corresponding No. 1 blocks 103 at the same time.

[0048] Reference Figure 1 and Figure 2 The connecting parts include anchor screws 13 and anchor nuts 14. At least one pair of anchor screws 13 is arranged at the position of each Bailey beam 1 corresponding to the zero block 102. In the present embodiment, the anchor screws 13 are a pair, one end of the anchor screw 13 is preset on the zero block 102, and the other end is passed through the Bailey beam 1; each anchor screw 13 is threadedly installed with a plurality of anchor nuts 14, and the anchor nuts 14 abut against the top of the Bailey beam 1, thereby completing the fixation of the Bailey beam 1.

[0049] Reference Figure 3 and Figure 4 A track 5 is laid directly below the same row of Bailey beams 1 and at the position of the first block 103. The track 5 extends in the arrangement direction of the Bailey beams 1 in the same row. A base 6 is slidably installed on the track 5. The base 6 is horizontally arranged. A first baffle 61 and a second baffle 62 are arranged on the base 6. The first baffle 61 and the second baffle 62 are respectively arranged at the two end positions in the sliding direction of the base 6; the first baffle 61 is vertically arranged, and the bottom end of the first baffle 61 is fixedly installed on the base 6; the bottom end of the second baffle 62 is hinged to the base 6, and the rotating shaft sleeve of the second baffle 62 is provided with a torsion spring, and the two ends of the torsion spring are respectively arranged. The first baffle plate 61 and the second baffle plate 62 are respectively fixedly mounted on the second baffle plate 62 and the base 6; when the second baffle plate 62 is in a natural state, the second baffle plate 62 is in a vertical state; thus, after the positioning of a Bailey beam 1 is completed, the base 6 is pulled, and the second baffle plate 62 will rotate and smoothly pass through the position between the Bailey beam 1 and the first block 103; guide plates 63 are provided at the top ends of the first baffle plate 61 and the second baffle plate 62, and one end of the two guide plates 63 is respectively fixedly mounted on the first baffle plate 61 and the second baffle plate 62, and the other ends of the two guide plates 63 extend upward in a direction away from each other, thereby achieving a guiding effect on the Bailey beam 1.

[0050] The base 6 is provided with a limiter 65 for limiting the rotational position of the second baffle 62, so that when the Bailey beam 1 needs to be guided, the second baffle 62 can be stably limited in a vertical state by the limiter 65; the track 5 is provided with a driving assembly 66 for driving the base 6 to slide.

[0051] Reference Figure 3 and Figure 4The track 5 includes a plurality of segments 51 arranged along the length direction, and the plurality of segments 51 are arranged in sequence along the extension direction of the track 5. Two adjacent segments 51 are mutually sleeved and slidably arranged, and each segment 51 is detachably connected to the No. 1 block 103 through a positioning member. In this embodiment, the positioning member is a bolt, and the bolt is penetrated through the segment 51 and threadedly installed on the No. 1 block 103; a plurality of clamping grooves 52 are spaced apart along the length direction on the track 5, and a clamping block 64 is fixedly installed at one end of the guide plate 63 on the second baffle plate 62 away from the second baffle plate 62; when the second baffle plate 62 rotates to the gap position corresponding to the Bailey beam 1 and the No. 1 block 103, the clamping block 64 is clamped into the clamping groove 52, so that when the base 6 is pulled, the corresponding segment 51 can be driven to move, so that the track 5 is shortened as a whole.

[0052] A pair of limit members 65 are provided on the base 6, and the limit members 65 are spaced apart in a direction perpendicular to the sliding direction of the track 5. The limit members 65 include a locking plate 651 and a locking bolt 652. The base 6 is provided with a receiving groove 67 at a position close to the second baffle 62 and corresponding to the position of each limit member 65. One end of the locking plate 651 is rotatably mounted on the base 6 through the receiving groove 67, and the locking bolt 652 is passed through the other end of the locking plate 651 and threadedly mounted on the second baffle 62; therefore, when it is necessary to guide the Bailey beam 1, the second baffle 62 can be locked in a vertical setting through the locking plate 651; when it is necessary to pull the base 6, the locking plate 651 is retracted into the receiving groove 67.

[0053] Reference Figure 3 The driving assembly 66 includes a winding shaft 661, a pull rope 662 and a driving member 663. The winding shaft 661 is rotatably mounted at one end of the track 5 away from the second baffle 62; one end of the pull rope 662 is wound on the winding shaft 661, and the other end is fixedly mounted on the base 6; the driving member 663 is a motor, the driving member 663 is fixedly mounted on the track 5, and the output shaft of the driving member 663 is fixedly mounted on the winding shaft 661; thereby, the base 6 can be pulled to slide.

[0054] The present application also discloses a method for constructing a cable-stayed bridge segment. Referring to 5, the construction method includes:

[0055] S10: Laying the track 5, positioning each segment 51 on the first block 103 by means of positioning pieces, and making the position between the first baffle plate 61 and the second baffle plate 62 correspond to the position of the first Bailey beam 1.

[0056] S20 : ​​The Bailey beam 1 is suspended between the first baffle 61 and the second baffle 62 , and the anchoring screw 13 is passed through the Bailey beam 1 .

[0057] S30: Release the restraint on the second baffle 62, start the driving member 663, pull the base 6, and through the resistance of the Bailey beam 1, make the second baffle 62 rotate until the clamping block 64 is clamped into the clamping groove 52, driving the segment 51 where the clamping groove 52 is located to move together; then fix the Bailey beam 1 through the anchor nut 14.

[0058] S40: The remaining Bailey beams 1 are hoisted and fixed in sequence, and then the temporary cables 12 are tied.

[0059] S50: Remove the track 5; and install the working platform 3 and the lifting member.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction device for a cable-stayed bridge section using temporary cables, characterized in that: It comprises two rows of Bailey beams (1), the two rows of Bailey beams (1) are respectively used to be installed at the two ends of the zero block (102), one end of the Bailey beam (1) is used to be fixed to the zero block (102) through a connecting piece, and the other end is used to extend outside the first block (103), and the Bailey beams (1) in the same row are used to be arranged at intervals along the width direction of the bridge deck; a working platform (3) is fixedly installed on the top of the Bailey beams (1) in the same row, and a lifting member (4) for lifting the beam section is fixedly installed on the working platform (3); The connecting member comprises: an anchoring screw (13) preset on the zero block (102) and corresponding to the position of each Bailey beam (1) and an anchoring nut (14) threadedly mounted on the anchoring screw (13), the anchoring screw (13) passing through the Bailey beam (1), and the anchoring nut (14) abutting against the top of the Bailey beam (1); A track (5) is laid directly below the Bailey beams (1) in the same row and at the position of the first block (103); a base (6) is slidably mounted on the track (5); a first baffle (61) and a second baffle (62) are arranged on the base (6); the first baffle (61) and the second baffle (62) are respectively located on both sides of the base (6) in a sliding direction; the first baffle (61) is fixedly mounted on the base (6); the second baffle (62) is hinged to the base (6); a rotating shaft sleeve of the second baffle (62) is provided with a torsion spring, and two ends of the torsion spring are respectively connected to the second baffle (62) and the base (6); a limiting member (65) for limiting the rotation position of the second baffle (62) is installed on the base (6); and a driving component (66) for driving the base (6) to slide is installed on the track (5); A guide plate (63) is provided at the top end of the first baffle plate (61) and the second baffle plate (62), and the two guide plates (63) extend from the first baffle plate (61) or the second baffle plate (62) in a direction away from each other; The track (5) comprises: a plurality of segments (51) arranged along the length direction, the plurality of segments (51) are arranged in sequence and slidably arranged with each other, and each of the segments (51) is detachably connected to the first block (103) through a positioning piece; a plurality of positioning grooves (52) are arranged at intervals along the length direction on the track (5), and a clamping block (64) is installed at one end of the guide plate (63) located on the second baffle plate (62) away from the second baffle plate (62); when the second baffle plate (62) rotates to a gap position corresponding to the Bailey beam (1) and the first block (103), the clamping block (64) is clamped into the positioning groove (52).

2. A cable-stayed bridge section construction device using temporary cables according to claim 1, characterized in that: Anchors (11) are provided in the Bailey beams (1) in the same row, and the anchors (11) are fixedly connected with temporary cables (12). The temporary cables (12) are far away from one end connected with the anchors (11) and are used for anchoring connection with the main tower.

3. A cable-stayed bridge section construction device using temporary cables according to claim 1, characterized in that: The Bailey beam (1) is used to be fixed on one end of the zero block (102) and is provided with a connecting frame (2), and two rows of the Bailey beams (1) are used to be fixed on one end of the zero block (102) and are fixedly connected via the connecting frame (2).

4. A cable-stayed bridge section construction device using temporary cables according to claim 1, characterized in that: The driving assembly (66) comprises: a reel (661) rotatably mounted at one end of the track (5), a driving member (663) for driving the reel (661) to rotate, and a pull rope (662) reeled on the reel (661), wherein one end of the pull rope (662) away from the reel (661) is connected to the base (6).

5. The construction device for a cable-stayed bridge section using temporary cables according to claim 1, characterized in that: The limiting member (65) comprises: a locking plate (651) and a locking bolt (652); the locking plate (651) is rotatably mounted on the base (6); the locking bolt (652) is passed through the locking plate (651) and is threadedly mounted on the second baffle (62); and the base (6) is provided with a receiving groove (67) for the locking plate (651) to be rotated into.

6. A method for constructing a cable-stayed bridge section, based on the cable-stayed bridge section construction device using temporary cables as claimed in claim 1, characterized in that: The construction method comprises: Step 1: laying the track (5) so that the position between the first baffle (61) and the second baffle (62) corresponds to the position of the first Bailey beam (1); Step 2: Hang the Bailey beam (1) between the first baffle (61) and the second baffle (62), and allow the anchoring screw (13) to pass through the Bailey beam (1); Step 3: Keep the Bailey beam (1) in a suspended state, loosen the restraint on the second baffle (62), pull the base (6), and through the resistance of the Bailey beam (1), make the second baffle (62) rotate until the clamping block (64) is clamped into the clamping groove (52), driving the segment (51) where the clamping groove (52) is located to move together; then fix the Bailey beam (1) through the anchor nut (14); Step 4: hoist and fix the remaining Bailey beams (1) in sequence, and then tie the temporary cables (12); Step 5: Remove the track (5); and install the working platform (3).

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