Vertical stepping lifting structure for tie beam of large-span channel-crossing tied-arch bridge

Abstract

The utility model provides a large-span channel-crossing tied arch bridge tie beam vertical stepping lifting structure which comprises a plurality of lifting devices, each lifting device comprises a tie beam connecting device, a vertical threaded rod, a tie rod connecting frame, a hollow jack and a tie rod, and the lower end of the tie rod is connected to the tie rod connecting frame. The lower end of the hollow jack is connected with the upper end of the connecting sleeve, the lower end of the vertical threaded rod is connected with the straining beam connecting device, the upper end of the vertical threaded rod sequentially penetrates through the connecting sleeve and the hollow jack and then is connected with the upper suspension nut, and the vertical threaded rod is in threaded connection with the lower suspension nut. The lower hanging nut is used for being hung on the bottom wall so that the vertical threaded rod can be hung on the connecting sleeve. The lifting device has the advantages that the position of the straining beam can be conveniently and reliably lifted to meet the requirement, and the problem that the lifting cost is high due to the fact that a supporting platform is lapped in water to support lifting equipment to lift and lock the straining beam in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a vertical step-by-step lifting structure of a tie beam of a large-span cross-channel tie-bar arch bridge. Background Art

[0002] For a steel box tied arch bridge constructed with the arch-first-beam-later method, the construction quality of the tie beam not only determines the bridge line shape but is also closely related to the internal force of the structure's dead load. Therefore, it is very necessary to determine a reasonable construction procedure so that the state of the completed bridge approaches the design state. The traditional methods for hoisting tie beams mainly include the scaffolding method and the large floating crane method. The scaffolding method has a long construction period and requires continuous closure of the river channel, causing serious traffic damage; the floating crane method has high requirements on the capacity of the hoisting equipment and the external environment. The inclination angle of the boom is limited during hoisting, and safety, stability, and construction quality are not easy to control. Therefore, there is an urgent need for a high-quality and efficient method for hoisting the tie beams of a large-span cross-channel tied arch bridge. Utility Model Content

[0003] The utility model aims to provide a vertical step-by-step lifting structure for the tie beam of a large-span cross-channel tie arch bridge, which can conveniently and reliably lift the position of the tie beam to meet the requirements, thereby solving the problem of high lifting costs caused by the existing lifting lock of the tie beam by overlapping the support platform in water to support the lifting equipment.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technology: a vertical step-by-step lifting structure of a tie beam of a large-span cross-channel tie-bar arch bridge, comprising an arch rib and a tie beam, wherein the tie beam is provided with a plurality of prefabricated tie beam connectors distributed along the extension direction of the tie beam, characterized in that it also comprises a plurality of lifting devices, wherein the lifting devices comprise a tie beam connecting device, a vertical threaded rod, a tie rod connecting frame located above the tie beam connecting device, an upwardly telescopic hollow jack connected to the tie rod connecting frame, and a tie rod connected at the lower end to the tie rod connecting frame, wherein the hollow jack The lower end of the jack is connected to the upper end of the connecting sleeve, and a bottom wall is provided in the connecting sleeve. The lower end of the vertical threaded rod is connected to the tie beam connecting device, and the upper end of the vertical threaded rod passes through the connecting sleeve and the hollow jack in sequence and is connected to the upper suspension nut. The upper suspension nut is used to hang the vertical threaded rod on the hollow jack. The vertical threaded rod is threadedly connected with a lower suspension nut, and the lower suspension nut is used to hang on the bottom wall and hang the vertical threaded rod on the connecting sleeve. The process of lifting the tie beam is as follows: the first step is to connect the components: the arch rib is erected, the tie beam is sent to the bottom of the arch rib by a ship, the tie beam connecting devices of the plurality of lifting devices are connected to one of the tie beam pre-supporting connecting parts, the distance between the tie rod connecting frame and the tie beam connecting device is adjusted until the upper end of the tie rod can be connected to the arch rib when the hollow jack is in a contracted state and the upper hanging nut is suspended on the open-center jack, the upper end of the tie rod is connected to the arch rib, and the tie beam is in a horizontal state at this time; the second step is to lift the tie beam: the hollow jack is extended, the lower hanging nut is turned to abut against the bottom wall, the hollow jack is contracted, the upper hanging nut is turned to abut against the open-center jack, and the second step is repeated until the height of the tie beam meets the requirements; the third step is to connect the tie beam and the arch rib together through a sling, and the lifting device is removed from between the tie beam and the arch rib.

[0005] Preferably, there are two vertical threaded rods and two hollow jacks, and the two vertical threaded rods are correspondingly inserted into the two hollow jacks, and when the tie beam connection device is connected with the tie beam prefabricated connection piece, the two vertical threaded rods are located on both sides of the vertical plane passing through the center of gravity of the tie beam, so that the tie beam does not tilt laterally when lifting the tie beam.

[0006] Preferably, the vertical threaded rods are located on both sides of a vertical plane passing through the center of gravity of the tie beam, so that the tie beam does not tilt laterally when the tie beam is lifted.

[0007] Preferably, the two vertical threaded rods are located on both sides of the tie beam along the width direction of the tie beam.

[0008] Preferably, one lifting device is provided with two tie rods, and the two tie rods are distributed along the width direction of the tie beam.

[0009] Preferably, the tie rod connecting frame comprises an upper frame and a lower connecting plate, the hollow jack is connected to the upper frame, and the lower end of the connecting sleeve is connected to the lower connecting plate, so as to improve the connection reliability.

[0010] Preferably, the tie rod is fixed together with the upper frame and the lower connecting plate, so that the connection reliability is good.

[0011] Preferably, the tie rod is passed through the lower connecting plate, a large diameter section is provided at the lower end of the tie rod, a supporting step is formed between the large diameter section and the tie rod, and the lower connecting plate is placed on the supporting step, so that the connection is convenient.

[0012] Preferably, the tie rod connecting frame includes an upper frame, the upper frame includes two connecting rings, two upper horizontal connecting rods connecting the two connecting rings together, two longitudinal connecting rods correspondingly connecting the two ends of the upper horizontal connecting rods together, and two lower horizontal connecting rods connecting the two longitudinal connecting rods together, the two hollow jacks are correspondingly inserted into the two connecting rings and fixed together with the connecting rings, there are two tie rods, one tie rod is fixed together with a longitudinal connecting rod, a connecting ring, one end of the two upper horizontal connecting rods and one end of the two lower horizontal connecting rods, and the other tie rod is fixed together with another longitudinal connecting rod, another connecting ring, the other end of the two upper horizontal connecting rods and the other end of the two lower horizontal connecting rods. It can more reliably ensure vertical lifting during use.

[0013] Preferably, adjacent tie beam connection devices are connected together by a connecting cable, wherein a rigid section is provided in the middle of the connecting cable, wherein the rigid section is connected with a suspension line and a rigid rod extending downward, wherein the rigid rod is perpendicular to the rigid section, and wherein the lower end of the suspension line is connected with a sinker for straightening the suspension line. During the lifting process of the tie beam, if an angle is formed between the rigid rod and the suspension line, it means that the lifting distance of the tie beam by each lifting device deviates and causes the tie beam to tilt. At this time, the lifting device with a smaller lifting distance lifts the tie beam independently to restore the tie beam to a horizontal state. It is convenient to know whether the tie beam tilts during the lifting process and whether the tilt is corrected to a horizontal state.

[0014] Preferably, adjacent tie beam connection devices are connected together by a connecting cable, wherein a rigid section is provided in the middle of the connecting cable, wherein the rigid section is connected to a sling and a rigid rod extending downward, wherein the rigid rod is perpendicular to the rigid section, and wherein the lower end of the sling is connected to a sinker that straightens the sling. During the lifting process of the tie beam, if an angle is formed between the rigid rod and the sling, it means that the lifting distance of the tie beam by each lifting device deviates, causing the tie beam to tilt. At this time, the lifting device with a smaller lifting distance lifts the tie beam independently, thereby restoring the tie beam to a horizontal state. It is convenient to know whether the tie beam tilts during the lifting process and whether the tilt is corrected to a horizontal state.

[0015] The utility model has the following beneficial effects: the tie beam adopts an integral lifting installation process, with high precision, good structural integrity, good linear control, short construction period, easy quality assurance, simple construction, little impact on navigation, and safety and reliability.

[0016] Fast construction speed: This lifting technology breaks through the traditional lifting method of the tie beam of the tied arch bridge. The self-developed lifting system is easy to install and operate, with little construction interference. It can not only ensure the fast and stable lifting of the tie beam, but also ensure the lifting and installation efficiency of the tie beam.

[0017] Good construction quality: the formed arch ribs are used as the load-bearing system, and the lifting points are evenly set and accurately positioned, so that the stress state of the tie beam during lifting and installation is close to the design state, and the deformation of the tie beam can be effectively controlled.

[0018] Significant economic and social benefits: Tie beam transportation fully utilizes the large component transportation capacity of the waterway under the bridge and effectively controls transportation costs. The in-situ lifting of tie rods has a small impact range, allowing the approach bridge to be constructed simultaneously, while reducing the impact on waterway traffic. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the lifting device in Example 1;

[0020] Figure 2 This is a schematic diagram of the use state of the utility model;

[0021] Figure 3 It is a partial schematic diagram of the second embodiment of the utility model.

[0022] In the figure: arch rib 1, tie beam 2, tie beam prefabricated connector 3, lifting device 4, longitudinal connecting plate 5, transverse connecting plate 6, tie beam connecting device 7, vertical threaded rod 8, hollow jack 9, tie rod 10, connecting sleeve 11, bottom wall 12, upper hanging nut 13, lower hanging nut 14, top plate 15, hanging ear 16, hanging pin 17, operating platform 18, lower connecting plate 19, large diameter section 20, connecting ring 21, upper transverse connecting rod 22, longitudinal connecting rod 23, lower transverse connecting rod 24, connecting rope 25, rigid section 26, suspension line 27, rigid rod 28, pendant 29, upper frame 30. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1, see Figure 1 and Figure 2 A vertical step-by-step lifting structure for a tie beam of a large-span tie-bar arch bridge across a waterway comprises an arch rib 1 and a tie beam 2, wherein the tie beam is provided with a plurality of tie beam prefabricated connectors 3 and a plurality of lifting devices 4 distributed along the extending direction of the tie beam. The tie beam prefabricated connector comprises two longitudinal connecting plates 5 welded together with the tie beam and distributed transversely (the transverse bridge direction is transverse, and the longitudinal bridge direction is longitudinal) and distributed longitudinally and welded together with the tie beam and connecting the two longitudinal connecting plates together, and a transversely extending axial hole is provided on the longitudinal connecting plate. The lifting device comprises a tie beam connecting device 7, a vertical threaded rod 8, a tie rod connecting frame located above the tie beam connecting device, an upwardly telescopic hollow jack 9 connected to the tie rod connecting frame, and a tie rod 10 whose lower end is connected to the tie rod connecting frame. The lower end of the hollow jack is connected to the upper end of a connecting sleeve 11, a bottom wall 12 is provided in the connecting sleeve, and the lower end of the vertical threaded rod is connected to the tie beam connecting device. The upper end of the vertical threaded rod passes through the connecting sleeve and the hollow jack in sequence and is connected with the upper suspension nut 13. The upper suspension nut is used to hang the vertical threaded rod on the hollow jack. The vertical threaded rod is threadedly connected with a lower suspension nut 14. The lower suspension nut is used to hang on the bottom wall and hang the vertical threaded rod on the connecting sleeve. The tie beam connection device includes a top plate 15 and two pairs of suspension ears with suspension holes connected to the lower surface of the top plate. A connection gap is formed between the two suspension ears 16 of the same pair of suspension ears. Two longitudinal connecting plates are correspondingly inserted into the telescopic gaps of the two pairs of suspension ears. Two suspension pins 17 are correspondingly inserted into the telescopic shaft holes of the two longitudinal connecting plates and the suspension holes of the two pairs of suspension ears to connect the suspension ears with the longitudinal connecting plates. The lifting device is also provided with an operating platform 18.

[0025] There are two vertical threaded rods. There are two hollow jacks, and the two vertical threaded rods are correspondingly inserted into the two hollow jacks. When the tie beam connection device is connected with the tie beam prefabricated connection piece, the two vertical threaded rods are located on both sides of the vertical plane passing through the center of gravity of the tie beam. The two vertical threaded rods are located on both sides of the tie rod distributed along the width direction of the tie beam. A lifting device is provided with two tie rods, and the two tie rods are distributed along the width direction of the tie beam. The tie rod connecting frame includes an upper frame 30 and a lower connecting plate 19, the hollow jack is connected to the upper frame, and the lower end of the connecting sleeve is connected to the lower connecting plate. The tie rod is inserted into the lower connecting plate, and a large diameter section 20 is provided at the lower end of the tie rod. A supporting step is formed between the large diameter section and the tie rod, and the lower connecting plate is placed on the supporting step. The upper frame includes two connecting rings 21, two upper horizontal connecting rods 22 connecting the two connecting rings together, two longitudinal connecting rods 23 connecting the two ends of the upper horizontal connecting rods together in a one-to-one correspondence, and two lower horizontal connecting rods 24 connecting the two longitudinal connecting rods together. Two hollow jacks are respectively passed through the two connecting rings and fixed to the connecting rings (for example, by welding). One tie rod is fixed to one longitudinal connecting rod, one connecting ring, one end of the two upper horizontal connecting rods and one end of the two lower horizontal connecting rods. Another tie rod is fixed to another longitudinal connecting rod, another connecting ring, the other end of the two upper horizontal connecting rods and the other end of the two lower horizontal connecting rods.

[0026] The process of lifting the tie beam is as follows: the first step is to connect the components: set up the arch rib, send the tie beam to the bottom of the arch rib by ship, connect the tie beam connecting devices of several lifting devices to a tie beam pre-supporting connecting piece on the tie beam, adjust the distance between the tie rod connecting frame and the tie beam connecting device until the upper end of the tie rod can be connected to the arch rib when the hollow jack is in a contracted state and the upper hanging nut is suspended on the open-center jack, connect the upper end of the tie rod with the arch rib, and the tie beam is in a horizontal state at this time; the second step is to lift the tie beam: extend the hollow jack, turn the lower hanging nut to abut against the bottom wall, shrink the hollow jack, turn the upper hanging nut to abut against the open-center jack, and repeat the second step until the height of the tie beam meets the requirements; the third step is to connect the tie beam and the arch rib together through a sling, and remove the lifting device from between the tie beam and the arch rib.

[0027] Embodiment 2 is different from Embodiment 1 in that: adjacent tie beam connection devices are connected together by connecting cables 25, a rigid section 26 of a straight structure is provided in the middle of the connecting cables, the rigid section is connected with a suspension line 27 and a rigid rod 28 extending downward, the rigid rod is perpendicular to the rigid section, and the lower end of the suspension line is connected with a sinker 29 that makes the suspension line in a straight state. During the process of lifting the tie beam, if an angle is formed between the rigid rod and the suspension cable, it means that the distance of lifting the tie beam by each lifting device deviates and causes the tie beam to tilt, at this time, the lifting device with a smaller lifting distance is made to lift the tie beam independently to restore the tie beam to a horizontal state.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical step-by-step lifting structure of a tie beam of a large-span cross-channel tied arch bridge, comprising an arch rib and a tie beam, wherein the tie beam is provided with a plurality of prefabricated tie beam connectors distributed along the extension direction of the tie beam, characterized in that: It also includes a plurality of lifting devices, which include a tie beam connecting device, a vertical threaded rod, a tie rod connecting frame located above the tie beam connecting device, an upwardly telescopic hollow jack connected to the tie rod connecting frame, and a tie rod whose lower end is connected to the tie rod connecting frame, the lower end of the hollow jack is connected to the upper end of a connecting sleeve, a bottom wall is provided in the connecting sleeve, the lower end of the vertical threaded rod is connected to the tie beam connecting device, the upper end of the vertical threaded rod passes through the connecting sleeve and the hollow jack in sequence, and is connected to an upper suspension nut, the upper suspension nut is used to hang the vertical threaded rod on the hollow jack, the vertical threaded rod is threadedly connected with a lower suspension nut, the lower suspension nut is used to hang on the bottom wall and hang the vertical threaded rod on the connecting sleeve.

2. The vertical step-by-step lifting structure for the tie beam of a large-span cross-channel tied arch bridge according to claim 1 is characterized in that: There are two vertical threaded rods and two hollow jacks. The two vertical threaded rods are correspondingly inserted into the two hollow jacks. When the tie beam connecting device is connected with the tie beam prefabricated connecting piece, the two vertical threaded rods are located on both sides of the vertical plane passing through the center of gravity of the tie beam.

3. The vertical step-by-step lifting structure for the tie beam of a large-span cross-channel tied arch bridge according to claim 2 is characterized in that: The two vertical threaded rods are located on both sides of the tie beam along the width direction of the tie beam.

4. A vertical step-by-step lifting structure for tie beams of a long-span cross-channel tied arch bridge according to claim 1, 2 or 3, characterized in that: One of the lifting devices is provided with two tie rods, and the two tie rods are distributed along the width direction of the tie beam.

5. A vertical step-by-step lifting structure for tie beams of a long-span tied arch bridge across a waterway according to claim 1, 2 or 3, characterized in that: The tie rod connecting frame comprises an upper frame and a lower connecting plate, the hollow jack is connected to the upper frame, and the lower end of the connecting sleeve is connected to the lower connecting plate.

6. The vertical step-by-step lifting structure for the tie beam of a large-span tied arch bridge across a waterway according to claim 5 is characterized in that: The tie rod is fixed together with the upper frame and the lower connecting plate.

7. The vertical step-by-step lifting structure for the tie beam of a large-span cross-channel tied arch bridge according to claim 6 is characterized in that: The tie rod is passed through the lower connecting plate, a large diameter section is provided at the lower end of the tie rod, a supporting step is formed between the large diameter section and the tie rod, and the lower connecting plate is placed on the supporting step.

8. A vertical step-by-step lifting structure for tie beams of a long-span tied arch bridge across a waterway according to claim 2 or 3, characterized in that: The tie rod connecting frame includes an upper frame, which includes two connecting rings, two upper horizontal connecting rods connecting the two connecting rings together, two longitudinal connecting rods correspondingly connecting the two ends of the upper horizontal connecting rods together, and two lower horizontal connecting rods connecting the two longitudinal connecting rods together. The two hollow jacks are correspondingly inserted into the two connecting rings and fixed together with the connecting rings. There are two tie rods, one of which is fixed together with a longitudinal connecting rod, a connecting ring, one end of the two upper horizontal connecting rods and one end of the two lower horizontal connecting rods, and the other tie rod is fixed together with another longitudinal connecting rod, another connecting ring, the other end of the two upper horizontal connecting rods and the other end of the two lower horizontal connecting rods.

9. A vertical step-by-step lifting structure for tie beams of a long-span tied arch bridge across a waterway according to claim 1, 2 or 3, characterized in that: The tie beam prefabricated connecting part includes two transversely distributed longitudinal connecting plates welded together with the tie beam and a longitudinally distributed transverse connecting plate welded together with the tie beam for connecting the two longitudinal connecting plates together, the longitudinal connecting plates are provided with axial holes, the tie beam connecting device includes a top plate and two pairs of hanging ears connected to the lower surface of the top plate and provided with hanging holes, a connecting gap is formed between the two hanging ears of the same pair of hanging ears, the two longitudinal connecting plates are correspondingly inserted into the telescopic gaps of the two pairs of hanging ears, and the two hanging pins are correspondingly inserted into the telescopic axial holes of the two longitudinal connecting plates and the hanging holes of a pair of hanging ears to connect the hanging ears with the longitudinal connecting plates together.

10. A vertical step-by-step lifting structure for tie beams of a long-span tied arch bridge across a waterway according to claim 1, 2 or 3, characterized in that: Adjacent tie beam connection devices are connected together by a connecting cable, a rigid section is provided in the middle of the connecting cable, the rigid section is connected with a suspension line and a rigid rod extending downward, the rigid rod is perpendicular to the rigid section, and the lower end of the suspension line is connected with a sinker that keeps the suspension line in a straight state.

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