Basket-type steel box arch bridge arch rib hoisting device and method

Abstract

The present invention discloses a basket-type steel box arch bridge arch rib hoisting device and method, which belongs to the field of bridge construction technology. The device includes a first hoisting assembly and a second hoisting assembly respectively used to connect the two ends of the steel box arch rib. The first hoisting assembly and the second hoisting assembly have the same structure; the first hoisting assembly includes an arch rib first lifting lug, a first bidirectional steering rod, a first sliding frame, a first sling load-bearing beam, a first telescopic jack and a first cable hanging hook. Two groups of arch rib first lifting lugs are respectively installed on both sides of the steel box arch rib, one group of arch rib first lifting lugs is hinged to one end of the first sliding frame through a group of first bidirectional steering rods, and the other group of arch rib first lifting lugs is hinged to the other end of the first sliding frame through another group of first bidirectional steering rods. The first sliding frame is slidably installed on the first sling load-bearing beam. The device and method of the present invention can facilitate arch rib hoisting, spatial posture adjustment and improve installation accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a basket-type steel box arch bridge arch rib hoisting device and method. Background Art

[0002] Basket-type steel box arch bridges offer advantages such as light weight, strong stability, and excellent seismic performance, making them the preferred bridge type for bridge construction in areas with high seismic intensity. However, the steel box arch ribs must be fabricated and pre-assembled in a fabrication plant before being transported to the site for hoisting. Due to the varying structural dimensions, center of gravity locations, and hoisting control parameters of different ribs in basket-type steel box arch bridges, these bridges present challenges such as heavy lifting weight, difficulty adjusting the ribs, low hoisting efficiency, and high risks associated with overhead operations.

[0003] In the prior art, Chinese Patent Publication No. CN107338733A discloses a hoisting device and method for adjusting and positioning the mid-air posture of steel box arch ribs. By adjusting the lifting height of the jack and the rotation angle of the rotating shaft, the mid-air posture of the steel box arch ribs can be adjusted, enabling control of the horizontal and vertical tilt angles of the steel box arch ribs. Chinese Patent Publication No. CN102733310A discloses a method for hoisting and constructing arch rib segments of steel box basket arch bridges. Two sets of cable-type, adjustable-length shoulder beam slings are installed on the arch rib segments. The horizontal and vertical tilt angles of the steel box arch ribs can be controlled by adjusting the front and rear sets of slings and the lateral auxiliary cables of the slings.

[0004] Since the above hoisting devices and methods have problems such as heavy weight and complicated spatial posture adjustment, it is necessary to study a hoisting device and method suitable for the rapid hoisting of the arch ribs of basket-type steel box arch bridges. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a basket-type steel box arch bridge arch rib hoisting device and method, which facilitates arch rib hoisting, spatial posture adjustment and improves installation accuracy.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention discloses a basket-type steel box arch bridge arch rib lifting device, comprising a first lifting assembly and a second lifting assembly respectively used to connect the two ends of the steel box arch rib, the first lifting assembly and the second lifting assembly having the same structure; the first lifting assembly comprises an arch rib first lifting ear, a first bidirectional steering rod, a first sliding frame, a first sling load-bearing beam, a first telescopic jack and a first cable lifting hook, two groups of arch rib first lifting ears are respectively installed on both sides of the steel box arch rib, one group of arch rib first lifting ears is hinged to one end of the first sliding frame through a group of first bidirectional steering rods, and the other group of arch rib first lifting ears is hinged to the other end of the first sliding frame through another group of first bidirectional steering rods, the first sliding frame is slidably installed on the first sling load-bearing beam, and the first sling load-bearing beam is also installed with a first telescopic jack, the output end of the first telescopic jack is connected to the first sliding frame, and the two groups of first cable lifting hooks are respectively lifted at both ends of the first sling load-bearing beam.

[0008] Furthermore, a polytetrafluoroethylene plate is arranged between the first sliding frame and the first sling load-bearing beam.

[0009] Furthermore, the distances between the lifting points of the first lifting ears of the two groups of arch ribs and the center line of the steel box arch ribs are equal.

[0010] Furthermore, a digital level is arranged on the load-bearing beam of the first spreader.

[0011] Furthermore, a safety locking device is installed on the first spreader load-bearing beam, and the safety locking device includes a rack, a gear, a rotating shaft, an outer ratchet and two groups of side plates. The rack is fixedly connected to the first sliding frame and slidingly cooperates with the first spreader load-bearing beam. The two groups of side plates are fixed on both sides of the first spreader load-bearing beam. Holes are opened on the side plates, and internal teeth cooperating with the external ratchet are provided in the holes. The external ratchet is coaxially installed on the rotating shaft, and the rotating shaft is rotatably installed in the center of the hole. A gear is installed on the outside of the rotating shaft, and the gear is meshed with the rack.

[0012] Furthermore, an inner ratchet is installed on the outer side of the side plate, and a rotating wheel is coaxially installed on the rotating shaft. The outer side of the rotating shaft is rotatably connected to a mass block, and an arc-shaped groove is provided on the rotating wheel. A clamping block is slidingly provided in the arc-shaped groove, and the clamping block is fixed on the end face of the mass block; the inner side of the rotating wheel is rotatably connected to a locking tooth, and the mass block can act on the locking tooth when it rotates under the action of inertia, and the locking tooth can cooperate with the inner ratchet to lock the rotating shaft.

[0013] Furthermore, an outer cylinder is fixed on the side surface, and a retaining ring for limiting the rotating wheel is fixed on the inner side of the outer cylinder.

[0014] A method for hoisting the arch ribs of a basket-type steel box arch bridge, using any of the hoisting devices described above, comprises the following steps:

[0015] S1, completing the installation of the first hanging assembly and the second hanging assembly;

[0016] S2, use the telescopic jack to adjust the sliding frame to the middle position of the spreader load-bearing beam;

[0017] S3, driving the transport ship of the steel box arch rib to the lifting position;

[0018] S4, the first hoisting assembly and the second hoisting assembly are moved to above the steel box arch rib on the transport ship and are pin-connected to the steel box arch rib respectively;

[0019] S5, tighten the cable hooks away from the inward tilting side, and when the digital level shows that the adjustment spreader is kept level, tighten the remaining cable hooks at the same time, so that the steel box arch rib meets the installation posture of the steel box arch rib centerline cross-section angle;

[0020] S6, when the steel box arch rib is hoisted close to the installation position, the first hoisting assembly remains stationary, and the second hoisting assembly is lifted to make the steel box arch rib meet the installation posture in the front-to-back direction of the steel box arch rib;

[0021] S7, adjusting the telescopic jacks of the first hoisting assembly and the second hoisting assembly, and pushing them symmetrically in two directions respectively, so that the steel box arch ribs meet the installation posture in the left and right directions of the steel box arch ribs;

[0022] S8, hoist the steel box arch rib to the installation location for fixed installation;

[0023] S9, release the hook, and repeat S2-S8 until the steel box arch is closed.

[0024] The beneficial effects of the present invention are:

[0025] (1) The present invention discloses a basket-type lifting device and method for lifting the arch ribs of a steel box arch bridge. The lifting device matched with the steel box arch ribs has a simple structure, is lighter in weight than traditional lifting devices, and is easy to operate, practical and efficient. It can avoid the problems of the basket-type arch rib lifting device in the prior art, such as the heavy weight of the device and the cumbersome spatial posture adjustment, and can improve the positioning precision and accuracy during the installation of the column foot.

[0026] (2) In the technical solution of the present invention, a first hoisting assembly and a second hoisting assembly are provided, and a telescopic jack is provided on the hoist. The telescopic jack can adjust the lateral position, which can effectively adjust the spatial posture of the basket-type arch rib, realize the rapid positioning and installation of different arch rib segments, and thus improve the accuracy of the arch rib installation posture.

[0027] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0029] Figure 1 It is a structural schematic diagram of the first hoisting assembly of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the first cable hanging hook of the present invention;

[0031] Figure 3 Schematic diagram of step S3 of the hoisting construction method of the present invention;

[0032] Figure 4 Schematic diagram of step S4 of the hoisting construction method of the present invention;

[0033] Figure 5 Schematic diagram of step S5 of the hoisting construction method of the present invention;

[0034] Figure 6 This is a side view of the arch rib hoisting in step S5 of the hoisting construction method of the present invention;

[0035] Figure 7 This is a side view of the arch rib hoisting in step S6 of the hoisting construction method of the present invention;

[0036] Figure 8 Schematic diagram of the arch rib hoisting spatial posture in step S7 of the hoisting construction method of the present invention;

[0037] Figure 9 This is the installation location diagram of the safety locking device;

[0038] Figure 10 It is a structural diagram of the safety locking device;

[0039] Figure 11 Exploded view of the safety locking device.

[0040] The markings in the accompanying drawings are as follows: first lifting assembly 1, first lifting device load-bearing beam 111, first telescopic jack 112, first sliding frame 113, first bidirectional steering rod 114, first cable lifting hook 12, arch rib first lifting ear 13, second lifting assembly 2, second lifting device load-bearing beam 211, second telescopic jack 212, second sliding frame 213, second bidirectional steering rod 214, second cable lifting hook 22, arch rib second lifting ear 23, steel box arch rib 3, rack 4, gear 5, rotating shaft 6, outer ratchet 7, side plate 8, hole 9, inner tooth 10, inner ratchet 11, rotating wheel 12, mass block 13, arc groove 14, block 15, lock tooth 16, outer cylinder 17, retaining ring 18. DETAILED DESCRIPTION

[0041] like Figures 1 to 11 As shown, the present invention discloses a basket-type steel box arch bridge arch rib lifting device, including a first lifting component 1 and a second lifting component 2 respectively used to connect the two ends of the steel box arch rib 3. The length direction of the steel box arch rib 3 is the longitudinal direction, and the first lifting component 1 and the second lifting component 2 are located at the two ends of the steel box arch rib 3. The structure and connection method of the first lifting component 1 and the second lifting component 2 are exactly the same, but when controlling, certain differences will be made according to the posture of the steel box arch rib 3.

[0042] Take the first hoisting assembly 1 as an example. The first hoisting assembly 1 includes an arch rib first lifting lug 13, a first bidirectional steering rod 114, a first sliding frame 113, a first sling load-bearing beam 111, a first telescopic jack 112 and a first cable hook 12. Two sets of arch rib first lifting lugs 13 are respectively installed on both sides of the steel box arch rib 3, one set of arch rib first lifting lugs 13 is hinged to one end of the first sliding frame 113 through a set of first bidirectional steering rods 114, wherein the arch rib first lifting lug 13 and the lower end of the first bidirectional steering rod 114 are hinged via a pin, and the upper end of the first bidirectional steering rod 114 is hinged to the lower end of the first sliding frame 113 via a pin.

[0043] Similarly, another set of arch rib first lifting ears 13 are hinged to the other end of the first sliding frame 113 through another set of first bidirectional steering rods 114, so that the first sliding frame 113 corresponds to two sets of first bidirectional steering rods 114 and two sets of arch rib first lifting ears 13 at the same time. When the first sliding frame 113 slides along the first hanger load-bearing beam 111, the tension direction of the two sets of first bidirectional steering rods 114 can be changed, thereby adjusting the lateral posture of the steel box arch rib 3.

[0044] As a power source for adjusting the position of the first sliding frame 113, a first telescopic jack 112 is also installed on the first sling load-bearing beam 111. The output end of the first telescopic jack 112 is connected to the first sliding frame 113. Two sets of first cable hooks 12 are respectively hoisted at both ends of the first sling load-bearing beam 111, so that the steel box arch rib 3 meets the left and right installation posture of the steel box arch rib 3.

[0045] Similarly, the second lifting assembly 2 includes an arch rib second lifting lug 23, a second bidirectional steering rod 214, a second sliding frame 213, a second sling load-bearing beam 211, a second telescopic jack 212, and a second cable hook 22. Two sets of arch rib second lifting lugs 23 are respectively installed on both sides of the steel box arch rib 3. One set of arch rib second lifting lugs 23 is hinged to one end of the second sliding frame 213 through a set of second bidirectional steering rods 214, and the other set of arch rib second lifting lugs 23 is hinged to the other end of the second sliding frame 213 through another set of second bidirectional steering rods 214. The arch rib second lifting lugs 23 are hinged to the lower end of the second bidirectional steering rod 214 via a pin, and the upper end of the second bidirectional steering rod 214 is hinged to the lower end of the second sliding frame 213 via a pin.

[0046] The second sliding frame 213 is slidably mounted on the second spreader support beam 211. A second telescopic jack 212 is also mounted on the second spreader support beam 211. The output end of the second telescopic jack 212 is connected to the second sliding frame 213. Two sets of second cable hooks 22 are respectively mounted on both ends of the second spreader support beam 211. The adjustment method of the second lifting assembly 2 itself is exactly the same as that of the first lifting assembly 1 and will not be repeated here. The combination of the first and second lifting assemblies 1 and 2 is used to adjust the steel box arch rib 3 to the desired installation posture in the front-to-back direction.

[0047] In this embodiment, a polytetrafluoroethylene plate is arranged between the first sliding frame 113 and the first sling load-bearing beam 111, which can reduce the friction between the first sliding frame 113 and the first sling load-bearing beam 111, thereby serving as a protective device. Similarly, a polytetrafluoroethylene plate is arranged between the second sliding frame 213 and the second sling load-bearing beam 211.

[0048] In this embodiment, the distances from the hanging points of the two groups of arch rib first lifting ears 13 to the center line of the steel box arch rib 3 are equal, and the distances from the hanging points of the two groups of arch rib second lifting ears 23 to the center line of the steel box arch rib 3 are equal, which can increase the balance of the steel box arch rib 3 when adjusting its posture.

[0049] In this embodiment, digital levels are arranged on both the first sling load-bearing beam 111 and the second sling load-bearing beam 211 to facilitate adjustment and feedback, thereby improving the efficiency of lifting.

[0050] In this embodiment, a safety locking device is installed on the first spreader support beam 111. This device provides protection even when the telescopic jack fails or is unloaded. Specifically, the safety locking device can promptly lock the first sliding frame 113 when deflection occurs between the first sliding frame 113 and the first spreader support beam 111, preventing safety issues caused by excessive sliding of the first sliding frame 113 caused by the steel box arch ribs 3. Similarly, a safety locking device can be installed on the second spreader support beam 211 to enhance the safety of the device during use.

[0051] Specifically, the safety locking device disclosed in the present invention includes a rack 4, a gear 5, a rotating shaft 6, an outer ratchet 7 and two sets of side plates 8. The rack 4 is fixedly connected to the first sliding frame 113 and slidably cooperates with the first sling load-bearing beam 111. The two sets of side plates 8 are fixed on both sides of the first sling load-bearing beam 111. A hole 9 is provided on the side plate 8. An internal snap-fitting tooth 10 that cooperates with the outer ratchet 7 is provided in the hole 9. The outer ratchet 7 is coaxially mounted on the rotating shaft 6. The rotating shaft 6 is rotatably mounted at the center of the hole 9. A gear 5 is mounted on the outside of the rotating shaft 6, and the gear 5 is meshed with the rack 4. It is understandable that in order to facilitate the cooperation between the internal snap-fitting tooth 10 and the outer ratchet 7, the internal snap-fitting tooth 10 can be set at multiple locations in the circumferential direction of the hole 9, which can be understood by those skilled in the art. The rotating shaft 6 is rotatably installed on the side plate 8 through an elastic support. When deflection occurs between the first sliding frame 113 and the first hoist load-bearing beam 111, the rotating shaft 6 compresses the side plate 8, and the outer ratchet 7 on the rotating shaft 6 engages with the inner latching tooth 10, thereby preventing the rotating shaft 6 from continuing to rotate, avoiding excessive sliding of the first sliding frame 113, facilitating subsequent adjustments and continuing lifting, and improving safety.

[0052] In this embodiment, the side panels 8 have two sets of inner ratchets 11 mounted on the outer sides of the side panels 8. Each set of side panels 8 has one set of inner ratchets 11 mounted on it. The ratchet teeth of the two sets of inner ratchets 11 are oriented in opposite directions, thus accommodating the movement of the rack 4 in both directions. A rotating wheel 12 is coaxially mounted on the rotating shaft 6. A mass block 13 is rotatably connected to the outer side of the rotating shaft 6. The rotating wheel 12 has an arcuate groove 14, and a clamping block 15 is slidably disposed within the arcuate groove 14. The clamping block 15 is fixed to the end face of the mass block 13. A locking tooth 16 is rotatably connected to the inner side of the rotating wheel 12. The mass block 13 rotates under the action of inertia, acting on the locking tooth 16. The locking tooth 16 can cooperate with the inner ratchet 11 to lock the rotating shaft 6. When the first sliding frame 113 slides rapidly and needs to stop, the load of the telescopic jack is reduced, and the rotating wheel 12 stops rotating at this time. However, there is space for the block 15 to move in the arc groove 14 of the rotating wheel 12. Under the action of the inertia of the mass block 13, it can still rotate a certain arc relative to the rotating wheel 12. At this time, the mass block 13 acts on the locking tooth 16, and the locking tooth 16 is pushed outward, so that it can cooperate with the inner ratchet 11 to lock the rotating shaft 6, thereby playing a locking role.

[0053] In this embodiment, an outer cylinder 17 is fixed on the side surface, and a retaining ring 18 is fixed on the inner side of the outer cylinder 17 for limiting the rotating wheel 12 and also guiding the rotation of the rotating wheel 12.

[0054] A method for hoisting the arch ribs of a basket-type steel box arch bridge, using any of the hoisting devices described above, comprises the following steps:

[0055] S1, complete the installation of the first hanging component 1 and the second hanging component 2;

[0056] S2, use the telescopic jack to adjust the sliding frame to the middle position of the spreader load-bearing beam;

[0057] S3, driving the transport ship of the steel box arch rib 3 to the hoisting position;

[0058] S4, the first hoisting assembly 1 and the second hoisting assembly 2 are moved to above the steel box arch rib 3 on the transport ship, and are pin-connected to the steel box arch rib 3 respectively;

[0059] S5, tighten the cable hook away from the inward tilt side, and when the digital level shows that the adjustment spreader is kept level, tighten the remaining cable hooks at the same time, so that the steel box arch rib 3 meets the installation posture of the centerline section angle of the steel box arch rib 3;

[0060] S6, when the steel box arch rib 3 is hoisted close to the installation position, the first hoisting assembly 1 remains stationary, and the second hoisting assembly 2 is lifted to make the steel box arch rib 3 meet the installation posture in the front-to-back direction of the steel box arch rib 3;

[0061] S7, adjusting the telescopic jacks of the first hoisting assembly 1 and the second hoisting assembly 2, and pushing them symmetrically in two directions respectively, so that the steel box arch rib 3 satisfies the left and right installation posture of the steel box arch rib 3;

[0062] S8, the steel box arch rib 3 is hoisted to the installation location for fixed installation;

[0063] S9, release the hook, and repeat S2-S8 until the steel box arch is closed.

[0064] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A basket-type steel box arch bridge arch rib lifting device, characterized by: The cam is connected to the first lifting device and the second lifting device is connected to the first lifting device and the second lifting device is connected to the first lifting device. The locking device comprises a rack, a gear, a rotating shaft, an outer ratchet and two sets of side plates, the rack being fixedly connected to the first sliding frame and slidingly cooperating with the first sling load-bearing beam, the two sets of side plates are fixed on both sides of the first sling load-bearing beam, and the two sets of side plates are fixed to the two sides of the first sling load-bearing beam. The side plates are provided with a hole, and the hole is provided with an inner clamping tooth that cooperates with the outer ratchet, and the outer ratchet is coaxially mounted on the rotating shaft, and the rotating shaft is rotatably mounted at the center of the hole, and the gear is meshed with the rack; an inner ratchet is installed on the outer side of the side plate, and a rotating wheel is coaxially mounted on the rotating shaft, and the outer side of the rotating shaft is rotatably connected to the mass block, and the rotating wheel is provided with an arc groove, and a clamping block is slidably provided in the arc groove, and the clamping block is fixed on the end face of the mass block; the inner side of the rotating wheel is rotatably connected with a locking tooth, and the mass block can rotate under the action of inertia to act on the locking tooth, and the locking tooth can cooperate with the inner ratchet to lock the rotating shaft.

2. The basket-type steel box arch bridge arch rib lifting device according to claim 1, characterized in that: A polytetrafluoroethylene plate is arranged between the first sliding frame and the first spreader load-bearing beam.

3. The basket-type steel box arch bridge arch rib lifting device according to claim 1, characterized in that: The distances between the lifting points of the first lifting ears of the two groups of arch ribs and the center line of the steel box arch ribs are equal.

4. The basket-type steel box arch bridge arch rib lifting device according to claim 1, characterized in that: A digital level is arranged on the first spreader load-bearing beam.

5. The basket-type steel box arch bridge arch rib lifting device according to claim 1, characterized in that: An outer cylinder is fixed on the side plate, and a retaining ring for limiting the rotating wheel is fixed on the inner side of the outer cylinder.

6. A basket-type steel box arch bridge arch rib hoisting method, characterized by: Using the lifting device according to any one of claims 1 to 5, the method comprises the following steps: S1, completing the installation of the first hanging assembly and the second hanging assembly; S2, use the telescopic jack to adjust the sliding frame to the middle position of the spreader load-bearing beam; S3, driving the transport ship of the steel box arch rib to the lifting position; S4, the first hoisting assembly and the second hoisting assembly are moved to above the steel box arch rib on the transport ship and are pin-connected to the steel box arch rib respectively; S5, tighten the cable hooks away from the inward tilting side, and when the digital level shows that the adjustment spreader is kept level, tighten the remaining cable hooks at the same time, so that the steel box arch rib meets the installation posture of the steel box arch rib centerline cross-section angle; S6, when the steel box arch rib is hoisted close to the installation position, the first hoisting assembly remains stationary, and the second hoisting assembly is lifted to make the steel box arch rib meet the installation posture in the front-to-back direction of the steel box arch rib; S7, adjusting the telescopic jacks of the first hoisting assembly and the second hoisting assembly, and pushing them symmetrically in two directions respectively, so that the steel box arch ribs meet the installation posture in the left and right directions of the steel box arch ribs; S8, hoist the steel box arch rib to the installation location for fixed installation; S9, release the hook, and repeat S2-S8 until the steel box arch is closed.

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