A bridge tower vertical rotation system and construction method thereof

Abstract

The invention discloses a bridge tower vertical rotation system and a construction method thereof, comprising a vertical rotation device, a traction device and a vertical winch system; the vertical winch system is installed on the pier at the tower root side of the bridge tower and is used for hingedly connecting the tower root end of the bridge tower; the top end of the vertical rotation device is mounted on the middle part of the bridge tower, and the bottom end is mounted on the traction device; the traction device fixing component is mounted on the horizontal pier and can vertically support the bottom end of the vertical rotation device, and the movable component is horizontally connected to the bottom end of the vertical rotation device; when the traction device is in motion, it can drive the bottom end of the vertical rotation device to move horizontally, thereby changing the height of the tower head end of the bridge tower; the invention can be applied to the vertical rotation construction of arch bridges across canyons, existing roads and railway lines, various types of special-shaped prefabricated bridge towers, including vertical bridge towers, vertical rotation construction and vertical rotation of temporary buckled back towers, and has good promotion and application prospects.

Description

[Technical field]

[0001] The invention patent relates to the field of bridge engineering, specifically a bridge tower vertical rotation system and a construction method thereof, which is particularly suitable for the construction and control of special-shaped bridge tower vertical rotation systems. [Background technology]

[0002] At present, the vertical rotation system of bridge towers at home and abroad is mainly composed of temporary towers, traction devices and cables. The bridge tower is rotated around the tower foot through the upward traction force and finally reaches the designated design position. This method requires the installation of temporary back-fastening cable towers and the setting of multiple anchors to balance the horizontal and vertical forces during the rotation process. The project cost is high, the high-altitude operation time is long, and the construction working environment is poor. In the specific bridge construction process, it is also necessary to comprehensively, scientifically and reasonably calculate the key control factors of the construction process, such as the height of the temporary cable tower, the required bearing pressure, the back-fastening cable force and horizontal angle, the deformation and force of the main tower itself, and the center of gravity of the special-shaped tower changes continuously during the vertical rotation process. The stability problem caused by this cannot be ignored, and it has high requirements for designers, construction personnel and construction facilities.

[0003] With the development of my country's economy and society, cross-line bridges such as those across existing highways and railways are becoming more and more common. In order to reduce the impact on existing lines, new vertical rotation devices and construction methods for bridge towers, especially special-shaped towers, are urgently needed to solve the technical problems of vertical rotation of bridge towers under limited site conditions and harsh construction conditions, and provide a new reference angle for the design and construction of cross-line bridges.

[0004] In view of this, overcoming the defects of the above-mentioned prior art is an urgent problem to be solved in the field of this technology. [Summary of the invention]

[0005] The technical problem to be solved by the present invention is that the current vertical rotation device used for bridges has a complex structure, is difficult to construct, and has poor overall balance and stability. It is particularly not suitable for situations where the center of gravity of special-shaped towers constantly changes during the vertical rotation process. A stable vertical rotation device is built through a bridge tower vertical rotation system, and the construction process is simplified through a construction method.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions.

[0007] In a first aspect, the present invention provides a bridge tower vertical rotation system, comprising a vertical rotation device, a traction device and a vertical winch system; the vertical winch system is installed on the pier on the tower root side of the bridge tower, and is used to hinge the tower root end of the bridge tower; the top end of the vertical rotation device is mounted on the middle of the bridge tower, and the bottom end is mounted on the traction device; the traction device fixed component is mounted on the horizontal pier to support the bottom end of the vertical rotation device, and the movable component is horizontally connected between the bottom end of the vertical rotation device and the traction device power component.

[0008] Furthermore, the vertical rotation device is a truss structure, including a top side bar, a bottom side bar, a side bar, a front tie bar and a rear tie bar;

[0009] There are two side bars, which are symmetrically hinged to the two ends of the top bar and the bottom bar to form a rectangular space truss structure;

[0010] One end of the front pull rod is hinged to the top side rod, and the other end is connected to the front end of the back of the bridge tower;

[0011] One end of the rear tie rod is hinged to the top side rod, and the other end is connected to the rear end of the back of the bridge tower;

[0012] A triangular space truss structure is formed between the front tie rod, the rear tie rod and the contact section thereof on the bridge tower.

[0013] Further, the traction device comprises a traction steel rope, a slideway and a winch; wherein the movable part of the traction device is the traction steel rope, wherein the power part of the traction device is the winch;

[0014] The two ends of the bottom side rod are respectively provided with ground bearings to form sliding ends;

[0015] The traction steel rope is provided with a plurality of traction steel ropes, one end of which is connected to the bottom side rod of the vertical rotation device, and the other end is arranged in the winch;

[0016] The slideway is horizontally installed on the bridge pier, and its width is adapted to the vertical rotation device; the bottom side rod is slidably arranged on the slideway;

[0017] The winch is installed on the pier at the tower root side of the bridge tower and is connected to the bottom side rod through a traction steel rope.

[0018] Furthermore, the vertical winch system includes a winch cap, a tower bottom segment, a vertical rotation interface and a position sensor.

[0019] The winch pedestal is vertically fixed on the pier at the tower root side of the bridge tower, the tower bottom segment is arranged at the top of the winch pedestal, and the vertical rotation interface is arranged at the tower root end of the hinged bridge tower in the tower bottom segment; the position sensor is arranged in the rotation interface and connected to the processor of the winch, which is used to monitor the vertical rotation position of the bridge tower and transmit the position information data to the winch.

[0020] Furthermore, a plurality of reinforcing rods are arranged between the two side rods.

[0021] Furthermore, a first groove is provided at the front end of the back of the bridge tower, and a second groove is provided at the rear end; multiple front pull rods and / or rear pull rods are provided, wherein one end of multiple front pull rods is evenly hinged on the top side rod, and the other end is hinged in the first groove at the front end of the back of the bridge tower, wherein one end of multiple rear pull rods is evenly hinged on the top side rod, and the other end is hinged in the second groove at the rear end of the back of the bridge tower.

[0022] Furthermore, an anti-pull-out groove is provided on the slideway, and anti-jump pins are provided at both ends of the bottom edge rod, and the anti-jump pins are stuck in the anti-pull-out groove.

[0023] Furthermore, it also includes a stabilizing cable, one end of which is connected to the pier at the tower head end of the bridge tower, and the other end of which is connected to the tower head of the bridge tower.

[0024] In a second aspect, the present invention provides a construction method for a bridge tower vertical rotation system, which is applied to the bridge tower vertical rotation system proposed in the first aspect and includes the following steps.

[0025] Step 1: Construct and set up the bridge tower piers according to the design drawings, build a winch pedestal at the designated end of the pier, set the tower bottom segment on the upper surface of the winch pedestal, and open a vertical rotation interface in the bottom segment.

[0026] Step 2: Set up the foundation support to complete the construction of the special-shaped bridge, where the tower root end of the special-shaped bridge is connected to the vertical rotation interface.

[0027] Step 3: Install the traction device, wherein the slide is horizontally set on the bridge pier, and the width is adjusted according to the requirements of the design drawings; wherein the winch is installed on the bridge pier at the base of the bridge tower; install the vertical rotation device, hinge one end of the front tie rod and the rear tie rod to the top side rod at the same time, connect the other end of the front tie rod to the first groove on the back of the bridge tower, and connect the other end of the rear tie rod to the second groove on the back of the bridge tower to form a triangular space truss structure; place the bottom side rod on the slide, and hinge the two side rods to the two sides of the top side rod and the bottom side rod to form a parallelogram space truss structure;

[0028] Wind one end of the traction steel rope into the winch, and connect the other end to the bottom side rod, so that it is parallel to the slideway when the traction steel rope is tightened;

[0029] One end of the stabilizing cable is connected to the pier on the tower head side of the bridge tower, and the other end is connected to the tower head of the bridge tower.

[0030] Step 4: The vertical rotation action is to rotate the bridge tower upward around the tower root end: start the winch of the traction device to move forward to retract the traction steel rope. Under the action of the traction steel rope, the bottom of the bottom side rod gradually approaches the tower root of the bridge tower along the slideway, and the bottom of the bottom side rod pushes the side rod to rotate around the top side rod. At the same time, the top of the side rod gradually rises and lifts the top side rod. The top side rod lifts the front pull rod and the rear pull rod to drive the bridge tower to rotate vertically until the position sensor detects that the bridge tower is lifted to the specified position. The winch automatically reduces the power to the specified value according to the position sensor signal, maintains the traction steel rope to resist the horizontal component formed by the bridge tower's own weight, and then fixes the bridge tower to the bottom segment of the tower through bolts to prevent it from falling down automatically, and can use hard blocks to support the bottom side rod to prevent it from automatically sliding toward the tower head of the bridge tower; when the bridge tower position is stable, turn off the winch; when the bridge tower rotates beyond the threshold, the stabilizing cable is just straightened to hold the bridge tower.

[0031] Step 5: Reset action: When the bridge tower is rotated downward around the tower root end in reverse rotation according to the progress of the project, first start the winch in the forward direction to appropriately retract the small section of traction rope until the hard block and bolt can be withdrawn, then control the winch in the reverse direction and slowly release the traction rope. The bridge tower squeezes the hypotenuse rod under the action of gravity, and the hypotenuse rod generates a horizontal component force to push the bottom rod toward the tower head of the bridge tower until the position sensor detects that the bridge tower is placed in the specified position. The winch automatically reduces the power to shut down according to the position sensor signal.

[0032] Step 6: After the bridge tower forms a stable structure, remove the traction device, vertical rotation device, stabilizing cable and other equipment.

[0033] Step 7: Consolidate and seal the tower base and vertical rotation interface of the bridge tower. For steel bridge towers, consolidation can be achieved by welding the patch section at the vertical rotation interface. For concrete bridge towers, consolidation can be achieved by pouring concrete at the vertical rotation interface. Proceed to the next step according to the specific project.

[0034] Compared with the prior art, the present invention has the following advantages.

[0035] 1. The vertical rotation device and construction method designed in this patent application are low-cost, reduce the amount of high-altitude operations, have low construction difficulty, and greatly increase the construction efficiency of vertical rotation construction of bridges across existing lines.

[0036] 2. The bridge tower can be vertically rotated into place at one time through the coordination between the vertical rotation device and the traction device, thus avoiding high-altitude operations; it saves the cost of back cable tower buckling and ground anchor costs, shortens the construction period, saves construction costs, and has huge economic benefits.

[0037] 3. The internal rods of the vertical rotation device form a triangular space truss structure or a quadrangular space truss structure, which simplifies the structure of the vertical rotation device and improves the mechanical strength and stability of the vertical rotation device by adding reinforcing rods.

[0038] 4. The present invention can be applied to the design and construction of cross-line bridges, as well as the vertical rotation construction of arch bridges across canyons, various types of special-shaped prefabricated bridge towers, including vertical bridge towers, vertical rotation construction, and vertical rotation of temporary buckled back towers, and has good prospects for promotion and application.

Brief Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a three-dimensional diagram of the bridge tower when it is horizontal in the bridge tower vertical rotation system in an embodiment of the present invention.

[0041] Figure 2 It is a three-dimensional diagram of the vertical rotation device in an embodiment of the present invention when isolated.

[0042] Figure 3 It is a three-dimensional diagram of the traction device in an embodiment of the present invention when isolated.

[0043] Figure 4 It is a three-dimensional diagram of the vertical winch system in an embodiment of the present invention when isolated.

[0044] Figure 5 It is a three-dimensional diagram of the bridge tower when it is isolated in the embodiment of the present invention.

[0045] Figure 6 It is a stereoscopic diagram of a single-side slideway isolated in an embodiment of the present invention.

[0046] Figure 7 It is a stereoscopic view of the bottom side rod and the ground bearing in an embodiment of the present invention when they are isolated.

[0047] Figure 8 It is a three-dimensional diagram of the bridge tower when it is vertically rotated to the top in an embodiment of the present invention.

[0048] In the figure: 1-vertical rotation device; 2-traction device; 3-vertical winch system; 4-first groove; 5-second groove; 6-stabilizing rope; 101-top side rod; 102-bottom side rod; 103-side rod; 104-front pull rod; 105-rear pull rod; 106-reinforcement rod; 107-ground bearing; 108-anti-jump pin; 201-traction steel rope; 202-slideway; 203-winch; 204-anti-pull-out groove; 301-winch base; 302-tower bottom stage; 303-vertical rotation port; 304-position sensor. [Specific implementation method]

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0051] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0052] Embodiment 1: The embodiment of the present invention provides a bridge tower vertical rotation system, such as Figure 1-8 As shown, it includes a vertical rotation device 1, a traction device 2 and a vertical winch system 3; the vertical winch system 3 is installed on the pier at the base side of the bridge tower, and is used to hinge the base end of the bridge tower; the top of the vertical rotation device 1 is mounted on the middle of the bridge tower, and the bottom end is mounted on the traction device 2; the fixed part of the traction device 2 is mounted on the horizontal pier and vertically supports the bottom end of the vertical rotation device 1, and the movable part is horizontally connected between the bottom end of the vertical rotation device 1 and the power part of the traction device 2; when the traction device 2 is in motion, it can drive the bottom end of the vertical rotation device 1 to move horizontally, thereby changing the height of the tower head end of the bridge tower.

[0053] Furthermore, the vertical rotation device 1 is a truss structure, including a top side bar 101, a bottom side bar 102, a side bar 103, a front rod 104 and a rear rod 105; wherein the top side bar 101 is 7m long, the bottom side bar 102 is 7.2m long, the side bar 103 is 60m long, the front rod 104 is 20m long, and the rear rod 105 is 10m long;

[0054] There are two side bars 103, which are symmetrically hinged to the two ends of the top bar 101 and the bottom bar 102 to form a rectangular space truss structure;

[0055] One end of the front pull rod 104 is hinged to the top side rod 101, and the other end is connected to the front end of the back of the bridge tower;

[0056] One end of the rear tie rod 105 is hinged to the top side rod 101, and the other end is connected to the rear end of the back of the bridge tower;

[0057] The front tie rod 104, the rear tie rod 105 and their contact sections on the bridge tower form a triangular space truss structure to ensure the strength and stability of the bridge tower during the vertical rotation process.

[0058] Further, the traction device 2 includes a traction steel rope 201, a slideway 202 and a winch 203, wherein the slideway 202 is 90m long and is laid on a horizontal bridge pier; wherein the movable component of the traction device 2 is the traction steel rope 201, wherein the power component of the traction device 2 is the winch 203;

[0059] The two ends of the bottom side bar 102 are each provided with a ground bearing 107 to form a sliding end;

[0060] Two traction steel ropes 201 are provided, one end of the traction steel rope 201 is connected to the bottom side rod 102 of the vertical rotation device 1, and the other end is provided in the winch 203;

[0061] The slideway 202 is installed horizontally on the bridge pier, and its width is adapted to the vertical rotation device 1, both of which are 7.2m; the slideway 202 supports the bottom side bar 102 and can guide and constrain the bottom side bar 102 to slide horizontally, wherein the ground bearing 107 of the bottom side bar 102 can roll on the slideway 202 to reduce friction resistance;

[0062] The winch 203 is installed on the pier at the tower root side of the bridge tower to provide traction for the traction steel rope 201. When the winch 203 retracts the traction steel rope 201, the traction steel rope 201 pulls the bottom side rod 102 to move toward the tower root side of the bridge tower, and the tower head end of the bridge tower rises; when the winch 203 releases the traction steel rope 201, the bottom side rod 102 moves toward the tower head side of the bridge tower, and the tower head end of the bridge tower lowers.

[0063] Furthermore, the vertical winch system 3 includes a winch base 301, a tower bottom segment, a vertical rotation interface and a position sensor 304.

[0064] The winch pedestal 301 is vertically fixed on the pier at the base side of the bridge tower, the tower bottom segment is arranged at the top of the winch pedestal 301, and the vertical rotation interface is arranged in the tower bottom segment for hingedly connecting the base end of the bridge tower; the position sensor 304 is arranged in the rotation interface and is connected to the processor of the winch 203, so as to monitor the vertical rotation position of the bridge tower and transmit the position information data to the winch 203.

[0065] Furthermore, three reinforcing rods 106 are arranged between the two side rods 103 to improve the mechanical strength and stability of the rectangular space truss structure.

[0066] Furthermore, a first groove 4 is provided at the front end of the back of the bridge tower, and a second groove 5 is provided at the rear end; two front pull rods 104 and two rear pull rods 105 are provided, wherein one end of the front pull rod 104 is hinged on both sides of the top side rod 101, and the other end is hinged in the first groove 4 at the front end of the back of the bridge tower, wherein one end of the rear pull rod 105 is hinged on both sides of the top side rod 101, and the other end is hinged in the second groove 5 at the rear end of the back of the bridge tower; so that a stable structure is formed between the bridge tower and the front pull rod 104 and the rear pull rod 105.

[0067] Furthermore, an anti-pull-out groove 204 is provided on the slideway 202 , and anti-jump pins 108 are provided at both ends of the bottom side bar 102 . The anti-jump pins 108 are stuck in the anti-pull-out groove 204 to prevent the bottom side bar 102 from being lifted vertically upward.

[0068] Furthermore, it also includes a stabilizing cable 6, one end of which is connected to the pier at the tower head end of the bridge tower, and the other end is connected to the tower head of the bridge tower, which can prevent the bridge tower from tipping over under the action of the traction steel rope 201 or the action of inertia. The maximum extension distance of the stabilizing cable 6 is 90m, and it is a tensile and elastic steel rope or plastic rope.

[0069] Example 2: After providing a bridge tower vertical rotation system as described in Example 1, the embodiment of the present invention further provides a construction method of the bridge tower vertical rotation system. The bridge tower vertical rotation system used in this embodiment can directly utilize the one introduced in Example 1.

[0070] A construction method for a bridge tower vertical rotation system comprises the following steps.

[0071] Step 1: construct and set the bridge tower piers according to the design drawings, build a winch pedestal 301 at the designated end of the bridge pier, set the tower bottom segment on the upper surface of the winch pedestal 301, and open a vertical rotation interface in the bottom segment.

[0072] Step 2: Set up the foundation support to complete the construction of the special-shaped bridge, where the tower root end of the special-shaped bridge is connected to the vertical rotation interface.

[0073] Step 3: Install the traction device 2, wherein the slideway 202 is horizontally arranged on the bridge pier, and the width is adjusted according to the requirements of the design drawings; wherein the winch 203 is installed on the bridge pier at the root side of the bridge tower;

[0074] Install the vertical rotation device 1, hinge one end of the front tie rod 104 and the rear tie rod 105 to the top side rod 101 at the same time, connect the other end of the front tie rod 104 to the first groove 4 on the back of the bridge tower, and connect the other end of the rear tie rod 105 to the second groove 5 on the back of the bridge tower to form a triangular space truss structure; place the bottom side rod 102 on the slide 202, and hinge the two side rods 103 to both sides of the top side rod 101 and the bottom side rod 102 to form a parallelogram space truss structure;

[0075] One end of the traction steel rope 201 is wound in the hoist 203, and the other end is connected to the bottom side rod 102. When the traction steel rope 201 is tightened, it is parallel to the slideway 202;

[0076] One end of the stabilizing cable 6 is connected to the pier on the tower head side of the bridge tower, and the other end is connected to the tower head of the bridge tower.

[0077] Step 4: Vertical rotation, i.e., rotating the bridge tower upward around the tower root end: Start the winch 203 of the traction device 2 to move forward to retract the traction steel rope 201. Under the action of the traction steel rope 201, the bottom of the bottom side rod 102 gradually approaches the tower root of the bridge tower along the slideway 202. The bottom of the bottom side rod 102 pushes the side rod 103 to rotate around the top side rod 101. At the same time, the top of the side rod 103 gradually rises and lifts up the top side rod 101. The top side rod 101 lifts the front pull rod 104 and the rear pull rod 105, thereby driving the bridge tower to rotate vertically, until the position sensor 304 detects that the bridge tower has been lifted to the specified position, and the winch 203 automatically reduces the power to the specified value according to the signal of the position sensor 304, maintains the traction rope 201 to resist the horizontal component formed by the self-weight of the bridge tower, and then fixes the bridge tower to the bottom segment of the tower by bolts to prevent it from automatically falling down, and can prevent it from automatically sliding toward the tower head of the bridge tower by supporting the bottom side rod 102 with a hard block; when the bridge tower position is stable, the winch 203 is turned off; when the bridge tower rotation reaches the threshold value of 75 degrees, the stabilizing cable 6 is just straightened to carry the bridge tower, specifically, in the initial state, the head end of the bridge tower is against the pier, at this time the extended length of the stabilizing cable 6 is 0.5m, the angle between the hypotenuse rod and the slideway 202 is 30 degrees, when the bridge tower is lifted to the specified position, that is, when the stabilizing cable 6 is just straightened, the angle between the hypotenuse rod and the slideway 202 is 75 degrees; in the vertical rotation process, the center of gravity of the initial bridge tower is low The horizontal thrust transmitted to the bottom side rod 102 is large, and the corresponding output of the winch 203 is large. In the later and initial stages, the center of gravity of the bridge tower is high, and the horizontal thrust transmitted to the bottom side rod 102 is small, and the corresponding output of the winch 203 is small, thereby ensuring that the bridge tower rotates uniformly and slowly, especially when the bridge tower rotates more than 70 degrees, the rotation speed must be reduced to prevent the inertial rotation of the bridge tower from having a violent inertial impact on the stabilizing cable 6; when the stabilizing cable 6 is just straightened to carry the bridge tower, the output of the stabilizing cable 6 is 0.

[0078] Step 5: Reset action: When the bridge tower is rotated in the reverse direction according to the progress of the project, that is, when the bridge tower is rotated downward around the tower root end, first start the winch 203 in the forward direction to appropriately retract the small section of traction rope 201 until the hard block and bolt can be withdrawn, and then control the winch 203 to move in the reverse direction, slowly release the traction rope 201, and the bridge tower squeezes the hypotenuse rod under the action of gravity. The hypotenuse rod generates a horizontal component force to push the bottom rod 102 toward the tower head of the bridge tower until the position sensor 304 detects that the bridge tower is placed in the specified position, that is, the head end of the bridge tower is against the bridge pier, and the winch 203 automatically reduces the power to shut down according to the signal of the position sensor 304.

[0079] Step 6: After the bridge tower forms a stable structure, the traction device 2, the vertical rotation device 1, the stabilizing cable 6 and other equipment are gradually removed in a safe process. When removing the vertical rotation device 1, the hypotenuse rod is removed first, and then the front pull rod 104 of the first groove 4 and the rear pull rod 105 of the second groove 5 are removed with the assistance of a crane. The front pull rod 104, the rear pull rod 105 and the top side rod 101 are dropped as a whole and then further removed; then the traction rope 201, the slide 202 and the winch 203 are removed, and the bottom pull rod can be removed smoothly after the slide 202 is loosened.

[0080] Step 7: Consolidate and seal the tower base and vertical rotation interface of the bridge tower. For steel bridge towers, consolidation can be achieved by welding the patch section at the vertical rotation interface. For concrete bridge towers, consolidation can be achieved by pouring concrete at the vertical rotation interface. Proceed to the next step according to the specific project.

[0081] Furthermore, in Example 1, the size and structural strength of the component equipment in the vertical rotation device 1 and the vertical winch system 3 are related to the size and weight of the bridge tower. During the design, it is ensured that the vertical rotation device 1 and the vertical winch system 3 have sufficient strength to support the vertical rotation of the bridge tower, retaining a 100% safety margin, thereby reducing the risk of damage caused by sudden stress changes caused by shaking or impact during the vertical rotation operation in Example 2.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge tower vertical rotation system, characterized in that: The invention comprises a vertical rotation device (1), a traction device (2) and a vertical winch system (3); the vertical winch system (3) is installed on the pier at the base of the bridge tower and is used to hinge the base of the bridge tower; the top of the vertical rotation device (1) is mounted on the middle of the bridge tower, and the bottom is mounted on the traction device (2); the fixed part of the traction device (2) is mounted on the horizontal pier to support the bottom end of the vertical rotation device (1), and the movable part is horizontally connected between the bottom end of the vertical rotation device (1) and the power part of the traction device (2); Wherein, the vertical rotation device (1) is a truss structure, comprising a top side bar (101), a bottom side bar (102), a side bar (103), a front pull rod (104) and a rear pull rod (105); There are two side bars (103), and the two side bars (103) are symmetrically hinged to the two ends of the top bar (101) and the bottom bar (102), forming a rectangular space truss structure; One end of the front pull rod (104) is hinged to the top side rod (101), and the other end is connected to the front end of the back of the bridge tower; One end of the rear tie rod (105) is hinged to the top side rod (101), and the other end is connected to the rear end of the back of the bridge tower; The front tie rod (104), the rear tie rod (105) and their contact sections on the bridge tower form a triangular space truss structure; Wherein, the traction device (2) comprises a traction steel rope (201), a slideway (202) and a winch (203); A ground bearing (107) is provided at each end of the bottom side rod (102) to form a sliding end; A plurality of traction steel ropes (201) are provided, one end of the traction steel rope (201) is connected to the bottom side rod (102) of the vertical rotation device (1), and the other end is provided in the winch (203); The slideway (202) is horizontally installed on the bridge pier, and its width is adapted to the vertical rotation device (1); the bottom side bar (102) is slidably arranged on the slideway (202); The hoist (203) is installed on the pier at the base side of the bridge tower and is connected to the bottom side rod (102) via a traction steel rope (201).

2. The bridge tower vertical rotation system according to claim 1, characterized in that: The vertical winch system (3) comprises a winch support (301), a tower bottom segment, a vertical rotation interface and a position sensor (304). The winch pedestal (301) is vertically fixed on the pier at the base side of the bridge tower, the tower bottom segment is arranged at the top of the winch pedestal (301), and the vertical rotation interface is arranged at the base end of the tower hinged to the bridge tower in the tower bottom segment; the position sensor (304) is arranged in the rotation interface and connected to the processor of the winch (203) for monitoring the vertical rotation position of the bridge tower.

3. The bridge tower vertical rotation system according to claim 2, characterized in that: A plurality of reinforcing bars (106) are arranged between the two side bars (103).

4. The bridge tower vertical rotation system according to claim 3, characterized in that: The front end of the back of the bridge tower is provided with a first groove (4), and the rear end is provided with a second groove (5); a plurality of front tie rods (104) and / or rear tie rods (105) are provided, wherein one end of the plurality of front tie rods (104) is evenly hinged on the top side rod (101), and the other end is hinged in the first groove (4) at the front end of the back of the bridge tower, wherein one end of the plurality of rear tie rods (105) is evenly hinged on the top side rod (101), and the other end is hinged in the second groove (5) at the rear end of the back of the bridge tower.

5. The bridge tower vertical rotation system according to claim 4, characterized in that: An anti-pull-out groove (204) is arranged on the slideway (202), and anti-jump pins (108) are arranged at both ends of the bottom side bar (102), and the anti-jump pins (108) are stuck in the anti-pull-out groove (204).

6. The bridge tower vertical rotation system according to claim 5, characterized in that: It also comprises a stabilizing cable (6), one end of which is connected to the pier at the tower head end of the bridge tower, and the other end of which is connected to the tower head of the bridge tower.

7. A construction method for the bridge tower vertical rotation system as claimed in claim 6, characterized in that: The following steps are involved: Step 1: construct and set the bridge piers of the bridge tower according to the design drawings, build a winch pedestal (301) at the designated end of the bridge pier, set the tower bottom segment on the upper surface of the winch pedestal (301), and open a vertical rotation interface in the tower bottom segment; Step 2: Setting up the foundation support to complete the construction of the special-shaped bridge, wherein the tower root end of the special-shaped bridge is connected to the vertical rotation interface; Step 3: installing the traction device (2), wherein the slideway (202) is horizontally arranged on the bridge pier and the width is adjusted according to the requirements of the design drawings; wherein the winch (203) is installed on the bridge pier at the base of the bridge tower; The vertical rotation device (1) is installed, one end of the front tie rod (104) and the rear tie rod (105) are simultaneously hinged to the top side rod (101), the other end of the front tie rod (104) is connected to the first groove (4) on the back of the bridge tower, and the other end of the rear tie rod (105) is connected to the second groove (5) on the back of the bridge tower to form a triangular space truss structure; the bottom side rod (102) is placed on the slideway (202), and the two side rods (103) are hingedly connected to the two sides of the top side rod (101) and the bottom side rod (102) to form a parallelogram space truss structure; One end of the traction steel rope (201) is wound around the winch (203), and the other end is connected to the bottom side rod (102), so that the traction steel rope (201) is parallel to the slideway (202) when the traction steel rope (201) is tightened; One end of the stabilizing cable (6) is connected to the pier on the tower head side of the bridge tower, and the other end is connected to the tower head of the bridge tower; Step 4: Vertical rotation action, i.e., rotating the bridge tower upward around the tower root end: start the winch (203) of the traction device (2) to move forward to retract the traction steel rope (201), and the bottom of the bottom side rod (102) gradually approaches the tower root of the bridge tower along the slideway (202) under the action of the traction steel rope (201), and the bottom of the bottom side rod (102) pushes the side rod (103) to rotate around the top side rod (101), and at the same time, the top of the side rod (103) gradually rises and lifts the top side rod (101), and the top side rod (101) lifts the front pull rod (104) and the rear pull rod (105), thereby driving the bridge The tower rotates vertically until the position sensor (304) detects that the bridge tower is lifted to the specified position, and the winch (203) automatically reduces the power to the specified value according to the signal of the position sensor (304), maintaining the traction steel rope (201) to resist the horizontal component force formed by the weight of the bridge tower, and then the bridge tower is fixed to the tower bottom segment by bolts to prevent it from automatically falling down, and the bottom side rod (102) is pressed by a hard block to prevent it from automatically sliding toward the tower head of the bridge tower; the winch (203) is turned off when the bridge tower position is stable; when the bridge tower rotates beyond the threshold, the stabilizing cable (6) is just straightened to hold the bridge tower; Step 5: Reset action: When the bridge tower is rotated in the reverse direction according to the progress of the project, that is, when the bridge tower is rotated downward around the tower root end, the winch (203) is first started to move forward to appropriately retract the small section of the traction steel rope (201) until the hard block and the bolt can be withdrawn, and then the winch (203) is controlled to move in the reverse direction to slowly release the traction steel rope (201). The bridge tower squeezes the hypotenuse rod under the action of gravity, and the hypotenuse rod generates a horizontal component force to push the bottom rod (102) toward the tower head of the bridge tower until the position sensor (304) detects that the bridge tower is placed at the specified position, and the winch (203) automatically reduces the power to shut down according to the signal of the position sensor (304); Step 6: After the bridge tower forms a stable structure, the traction device (2), the vertical rotation device (1), and the stabilizing cable (6) are removed; Step 7: Consolidate and seal the tower base and vertical rotation interface of the bridge tower. For steel bridge towers, weld the patch section at the vertical rotation interface to achieve consolidation. For concrete bridge towers, pour concrete at the vertical rotation interface to achieve consolidation. Proceed to the next step according to the specific project.

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