Hanging basket and bottom basket system for extra-wide box beam

Abstract

The present invention provides a bottom basket system of a hanging basket, which includes a bottom basket truss, at least one group of traveling trusses supported at the bottom of the bottom basket truss, and a traveling hanger anchored on an engineering interface for suspending the traveling truss. The present invention also provides a hanging basket for an ultra-wide box girder using the above bottom basket system. The bottom basket system of the present invention can reduce the load on the bridge deck and has a large bearing capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a hanging basket for an ultra-wide box girder and a bottom basket system thereof. Background Art

[0002] In bridge engineering, especially when building wider box girders, the construction of the suspended casting section places high demands on the strength and rigidity of the hanging basket. The existing technical means is to install a C-beam on the bottom basket and drive the entire bottom basket to move synchronously through the movement of the main truss. However, this rear crossbeam movement method is only suitable for bridges with narrow width and small deadweight, and it is powerless for bridges with wide decks, large deadweight, and flange plates that cannot withstand excessive loads, such as cable-stayed bridges with ultra-wide box girders on the central cable plane. Therefore, the development of a new bottom basket system that adapts to the development of bridge construction technology has become an urgent issue to be solved. Summary of the invention

[0003] The primary purpose of the present invention is to provide a hanging basket bottom basket system which can reduce the bridge deck load and has a large bearing capacity.

[0004] Another object of the present invention is to provide a hanging basket using the above-mentioned bottom basket system.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A bottom basket system of a hanging basket comprises a bottom basket truss, at least one group of traveling trusses supported at the bottom of the bottom basket truss, and a traveling hanger anchored on an engineering interface for suspending the traveling trusses.

[0007] Furthermore, the bottom basket truss includes a front cross beam, a rear cross beam, and a plurality of longitudinal beams intersecting and connecting the front cross beam and the rear cross beam.

[0008] Furthermore, the front end of the walking truss is anchored below the front cross beam, and the middle part is anchored below the rear cross beam.

[0009] Preferably, the walking truss is perpendicular to the front crossbeam.

[0010] Preferably, the group of traveling trusses are evenly arranged below the bottom basket trusses along the axis of the front cross beam.

[0011] Preferably, the traveling hanger includes a fixed frame anchored to the engineering interface, a pair of connecting rods fixedly connected to the front end of the fixed frame and extending downward, and a pair of diagonal rods connecting the rear end of the fixed frame and the lower end of the connecting rods; the pair of connecting rods and the pair of diagonal rods are respectively kept at intervals along the transverse direction of the bridge, and the intervals are allowed to pass through by the traveling truss along the longitudinal direction of the bridge.

[0012] Preferably, the number of the traveling hangers corresponds one-to-one to the number of the traveling trusses.

[0013] Preferably, the front end and / or rear end of the fixing frame is anchored to the engineering interface by a first anchoring device; the first anchoring device comprises a sling passing through the front end / rear end of the fixing frame, a first shoulder pole beam abutting against the engineering interface and a second shoulder pole beam abutting against the bottom of the fixing frame, the first shoulder pole beam and the second shoulder pole beam being respectively used for fixing the two ends of the sling; wherein, the fixing frame is provided with a through hole for the sling to pass through, and the engineering interface is provided with a reserved hole for the installation of the first anchoring device.

[0014] Preferably, the front end and / or rear end of the fixing frame is anchored to the engineering interface through a second anchoring device; the second anchoring device includes two anchor rods and a third shoulder beam abutting against the engineering interface; wherein, the fixing frame is provided with a through hole for the two anchor rods to pass through, and the engineering interface is provided with a reserved hole for the installation of the second anchoring device.

[0015] Preferably, the traveling hanger is further provided with a supporting rod connecting the oblique rod and the connecting rod on the same side.

[0016] Preferably, the lower ends of the oblique rod and the connecting rod are fixed to form a lower end connecting structure, and a roller structure is provided above the connecting structure to assist the walking truss in walking.

[0017] Preferably, the roller structure comprises a pin and a steel pipe with an outer sleeve, and the outer wall of the pin and the inner wall of the steel pipe are filled with lubricant.

[0018] Preferably, a limit block is provided at the lower end of the traveling hanger, which is used to abut against the connecting structure / roller structure to prevent the traveling truss from escaping from the traveling hanger.

[0019] The present application also provides a hanging basket for an extra-wide box girder, which adopts the bottom basket system of any of the hanging baskets described above.

[0020] Preferably, the hanging basket also includes a main truss system, which includes a plurality of groups of main truss plates, each of which is arranged at a middle support point of the bridge deck box girder, and each group of main truss plates is transversely connected.

[0021] Preferably, each of the main truss pieces is provided with a main truss leg, and the main truss legs of the main truss pieces are of different heights.

[0022] Compared with the prior art, the solution of the present invention has the following advantages:

[0023] 1. The bottom basket system of the present invention is provided with a walking truss on the basis of the bottom basket truss, which overcomes the disadvantage that the bridge deck flange plate cannot bear excessive loads. At the same time, on the basis of ensuring that the deadweight of the bottom basket system does not increase, part of the force directly acting on the weaker parts of the cast box girder can be transferred, preventing the cast box girder from being subjected to excessive local force, and greatly increasing the bearing capacity of the bottom basket system.

[0024] 2. The bottom basket system of the present invention is equipped with a traveling hanger which is very convenient for loading and unloading. On the one hand, it can carry the walking truss and indirectly assist the walking of the bottom basket system. On the other hand, it ensures the synchronization of the walking of the hanging basket.

[0025] 3. The main truss of the hanging basket of the present invention is arranged at the middle support point of the bridge deck box girder, which can effectively solve the problem that the conventional cable hanging basket cannot meet the construction conditions due to the ultra-wide box girder cable-stayed bridge with the central cable surface and the flange plate cannot withstand excessive loads.

[0026] 4. The main truss legs of the hanging basket of the present invention are set to unequal heights. By adjusting the height of the front legs of each main truss, the height difference caused by the lateral slope of the top surface of the main beam can be offset.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 It is a structural schematic diagram of a hanging basket for an ultra-wide box girder of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the bottom basket system of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the traveling hanger in the bottom basket system of the present invention;

[0032] Figure 4 It is a schematic diagram of the plane layout of the reserved holes for the walking hanger in the bottom basket system of the present invention.

[0033] Among them, 10-main truss system; 101-main truss piece; 102-main truss leg; 20-bottom basket system; 201-bottom basket truss; 2011-front crossbeam; 2012-rear crossbeam; 202-traveling truss; 203-traveling hanger; 2031-fixed frame; 2032-connecting rod; 2033-diagonal rod; 2034-support rod; 2035-limiting block; 2036-connecting structure; 2037-roller structure; 204-first anchoring device; 2041-sling; 2042-first shoulder pole beam; 2043-second shoulder pole beam; 205-second anchoring device; 2051-anchor rod; 2052-third shoulder pole beam 30-anchoring system; 40-suspension system; 50-cast box beam; 501-reserved hole. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention. In addition, if the detailed description of the known technology is unnecessary for illustrating the features of the present invention, it will be omitted.

[0035] The hanging basket is a movable scaffolding that can move along the track. The main construction process of the hanging basket includes: installation of the hanging basket, pre-pressing of the hanging basket and moving the hanging basket forward to construct the beam section.

[0036] After the construction of sections 0# and 1# is completed, the installation procedure of the hanging basket is as follows:

[0037] A. Install the pillows and tracks;

[0038] B. Assemble the main frame of the hanging basket;

[0039] C. Install the front crossbeam and front sling;

[0040] D. Use a crane to hoist the assembled bottom formwork platform under the bridge into place, connect it with the front sling, and then install the rear sling;

[0041] D. Install the rear crossbeam and rear outer sling;

[0042] E. Pre-press the hanging basket to eliminate plastic deformation and measure the amount of elastic deformation

[0043] F. Install the inner and outer formwork beams and put them in place at section 1#;

[0044] The steps for beam section construction are as follows:

[0045] A. Adjust the bottom mold elevation and set the pre-camber;

[0046] B. Tie the bottom plate steel bars and web steel bars, and install the longitudinal prestressed pipes of the bottom plate and web;

[0047] C. Install the inner mold;

[0048] D. Tie the top plate reinforcement and install the top plate longitudinal prestressed pipes;

[0049] E. pouring concrete;

[0050] F. Maintenance, prestressing, grouting and anchor sealing.

[0051] The hanging basket can only move after the concrete pouring of the corresponding construction block is completed and the prestressed tendons are tensioned to the designed tension strength. When walking, a hand winch is set at the rear of the hanging basket to relax while walking. The hanging basket uses a synchronous hydraulic system for walking. One hanging basket uses a centrally controlled oil pump, which is set in the middle of the hanging basket. The length of the oil pipe from the oil pump to each jack is consistent, so as to ensure the synchronization of the hanging basket.

[0052] See also Figure 1-2 A hanging basket for an extra-wide box girder, the main structure of which includes a main truss system 10, a bottom basket system 20, an anchoring system 30, a suspension system 40, etc. The main truss system 10 includes a plurality of main truss pieces 101, which are diamond-shaped structures, composed of chords and node plates, and each group of main truss pieces 101 is transversely connected. Preferably, in order to solve the problem that the conventional guy-cable hanging basket cannot meet the construction conditions due to the central cable plane of the extra-wide box girder cable-stayed bridge, etc., the flange plate cannot withstand excessive loads on the bridge deck, the main truss piece 101 is arranged at the middle support point of the bridge deck box girder. Preferably, the main girder pieces 101 are all provided with main girder legs 102. Since the top surface elevations of the tracks of the main girder pieces 101 on both sides are inconsistent, mortar needs to be used for leveling under the low side track. The top surface of the track of the middle main girder piece 101 is higher than the top surface of the tracks of the main girder pieces 101 on both sides. Therefore, in order to offset the height difference of the top surface of the main beam caused by the lateral slope of the top surface of the main beam, the main girder legs 102 of the main girder pieces 101 on both sides are higher than the legs of the middle main girder piece 101. The main girder legs 102 are set to different heights for easy adjustment so that each main girder piece 101 can be kept at the same height.

[0053] See also Figure 2-3 The bottom basket system 20 includes a bottom basket truss 201, at least one group of traveling trusses 202 supported at the bottom of the bottom basket truss 201, and a traveling hanger 203 anchored on the engineering interface for suspending the traveling trusses 202. Generally, the engineering interface is a cast box beam 50.

[0054] The bottom basket truss 201 includes a front cross beam 2011, a rear cross beam 2012, and a plurality of longitudinal beams intersecting and connecting the front cross beam 2011 and the rear cross beam 2012. Preferably, in order to make the surface of the cast box beam 50 bear force uniformly, the group of walking trusses 202 are evenly arranged below the bottom basket truss 201 along the axis of the front cross beam 2011. At the same time, in order to adapt to the construction conditions of bridge decks of different widths, the group of walking trusses 202 can be composed of one or more walking trusses 202. In order to ensure that the walking truss 202 is firmly connected to the bottom basket truss 201, the front end of the walking truss 202 is anchored below the front cross beam 2011 and is perpendicular to the front cross beam 2011, the middle part of the walking truss 202 is anchored below the rear cross beam 2012, and the rear end of the walking truss 202 is anchored on the cast box girder 50 by setting a walking hanger 203, wherein the anchoring of the walking truss 202 and the bottom basket truss 201 can be achieved by means of a truss connection structure or other anchoring devices. The walking truss 202 is set on the basis of the bottom basket truss 201, which overcomes the disadvantage that the bridge deck flange plate cannot withstand excessive loads. At the same time, the setting method of the walking truss 202 greatly reduces the force of the bottom basket system 20 directly acting on the weaker parts of the cast box girder 50, and alleviates the local force of the cast box girder 50.

[0055] A traveling truss 202 is arranged on the basis of the bottom basket truss 201, and is used in conjunction with the traveling hanger 203. On the basis of ensuring that the dead weight of the bottom basket system 20 is not increased, uniform stress can be applied to the cast box girder 50, so that part of the force directly acting on the weaker parts of the cast box girder 50 can be transferred, preventing the cast box girder 50 from being subjected to excessive local stress. Therefore, the number of the traveling hangers 203 corresponds one-to-one to the number of the traveling trusses 202.

[0056] The traveling hanger 203 includes a fixed frame 2031 anchored to the cast box girder 50, a pair of connecting rods 2032 fixedly connected to the front end of the fixed frame 2031 and extending downward, and a pair of diagonal rods 2033 connecting the rear end of the fixed frame 2031 and the lower end of the connecting rods 2032. The pair of connecting rods 2032 and the pair of diagonal rods 2033 are respectively spaced apart along the transverse direction of the bridge, and the space is provided for the traveling truss 202 to pass through along the longitudinal direction of the bridge. The overall shape of the traveling hanger 203 is similar to a triangular prism, and the arrangement of the traveling truss 202 is equivalent to passing through the rectangular side of the triangular prism. The traveling hanger 203 not only serves as a supporting structure for the traveling truss 202, but also provides a traveling guide structure for the traveling truss 202. The traveling hanger 203 is also provided with a support rod 2034 connecting the oblique rod 2033 and the connecting rod 2032 on the same side, and the support rod 2034 is used to reinforce the connection between the oblique rod 2033 and the connecting rod 2032, and prevent the traveling truss 202 from coming out of the side of the traveling hanger 203 when traveling. The lower ends of the oblique rod 2033 and the connecting rod 2032 are fixed to form a lower end connecting structure 2036, and a roller structure 2037 is provided above the connecting structure 2036. The roller structure 2037 includes a pin and a steel pipe with an outer sleeve, and the outer wall of the pin and the inner wall of the steel pipe are filled with lubricant, such as butter, etc., to assist the traveling truss 202 in traveling. A stop block 2035 is also provided below the traveling hanger 203. The stop block 2035 is used to abut against the connection structure 2036 / roller structure 2037 to prevent the traveling truss 202 from coming out of the traveling hanger 203. Generally, in order to achieve the above function, the stop block 2035 can also be replaced by other similar structures. The traveling hanger 203, which is very convenient to install and remove, can carry the traveling truss 202 while indirectly assisting the walking of the bottom basket system 20. On the other hand, it ensures the synchronization of the walking of the hanging basket.

[0057] The traveling hanger 203 is anchored to the cast box girder 50 through the front end and / or rear end of the fixed frame 2031 via a first anchoring device 204; the first anchoring device 204 includes a sling 2041 passing through the front end / rear end of the fixed frame 2031, a first shoulder pole beam 2042 abutting against the cast box girder 50, and a second shoulder pole beam 2043 abutting against the bottom of the fixed frame 2031, the first shoulder pole beam 2042 and the second shoulder pole beam 2043 are respectively used for fixing the two ends of the sling 2041; wherein, the fixed frame 2031 is provided with a through hole for the sling 2041 to pass through. The front end and / or rear end of the fixing frame 2031 is anchored to the cast box beam 50 through the second anchoring device 205; the second anchoring device 205 includes two anchor rods 2051 and a third shoulder beam 2052 against the cast box beam 50; wherein the fixing frame 2031 is provided with through holes for the two anchor rods 2051 to penetrate. To adapt to different construction conditions, the anchoring methods of the first anchoring device 204 and the second anchoring device 205 can be flexibly adjusted according to the traveling hanger 203 or the engineering interface.

[0058] See also Figure 4 The cast box beam 50 is provided with a plurality of groups of reserved holes 501 for installing the first anchoring device 204 and the second anchoring device 205, wherein each group of reserved holes includes: a square through hole for the sling 2041 in the first anchoring device 204 to pass through, and two circular through holes for the two anchor rods 2051 in the second anchoring device 205 to pass through. When the specification of the sling 2041 is 20*4cm, the square through hole can be set to be 22cm in the longitudinal width and 5cm in the transverse width. The two circular through holes are arranged side by side in the transverse direction of the bridge, and the diameter matches the size of the anchor rod. Preferably, the diameter of the circular through hole is 4cm.

[0059] The reserved holes 501 are set from the 0# cast box girder 50, and the number of groups of the reserved holes 501 arranged in the transverse direction of the bridge is determined according to the number of traveling hangers 203 corresponding to the traveling trusses 202. For example, if there are two groups of traveling trusses 202, then there are also two groups of traveling hangers 203, and two groups of reserved holes 501 are evenly arranged in the transverse direction of the bridge. The first group of reserved holes 501 is set on the 0# cast box girder close to the side of the 1# cast box girder 50. The second set of reserved holes 501 is set on the first and second cast box beams 50, wherein the square through hole for the sling 2041 in the first anchoring device 204 to pass through is set on the second cast box beam close to the first cast box beam 50, and the two circular through holes for the two anchor rods 2051 in the second anchoring device 205 to pass through are set on the first cast box beam close to the second cast box beam 50. The third set of reserved holes is set in the same way, and the reserved holes 501 are guaranteed to be vertical, and after the reserved holes 501 are set, check again whether the hole positions are correctly reserved before pouring concrete.

[0060] Walking method of the walking truss 202: When the walking truss 202 completes the current travel, another walking hanger 203 is installed at the reserved hole 501 of the next section of the cast box girder 50 in the direction of the bridge deck construction, and the hanging basket moves forward to drive the walking truss 202 forward, and this cycle is repeated until the bridge deck construction is completed.

[0061] The above descriptions are only some embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bottom basket system of a hanging basket, characterized in that: It includes a bottom basket truss, at least one group of traveling trusses supported at the bottom of the bottom basket truss, and a traveling hanger anchored on the engineering interface for suspending the traveling trusses; The traveling hanger comprises a fixing frame anchored to the engineering interface, a pair of connecting rods fixedly connected to the front end of the fixing frame and extending downward, and a pair of diagonal rods connecting the rear end of the fixing frame and the lower end of the connecting rods; the pair of connecting rods and the pair of diagonal rods are respectively spaced apart along the transverse direction of the bridge, and the space is for the traveling truss to pass through along the longitudinal direction of the bridge; The traveling hanger not only serves as the supporting structure of the traveling truss, but also provides a traveling guide structure for the traveling truss; The front end and / or rear end of the fixing frame is anchored to the engineering interface through a first anchoring device; the first anchoring device comprises a sling passing through the front end / rear end of the fixing frame, a first shoulder pole beam abutting against the engineering interface, and a second shoulder pole beam abutting against the bottom of the fixing frame, the first shoulder pole beam and the second shoulder pole beam being respectively used for fixing the two ends of the sling; wherein the fixing frame is provided with a through hole for the sling to pass through, and the engineering interface is provided with a reserved hole for the installation of the first anchoring device; The front end and / or rear end of the fixing frame is anchored to the engineering interface through a second anchoring device; the second anchoring device comprises two anchor rods and a third shoulder beam abutting against the engineering interface; wherein the fixing frame is provided with through holes for the two anchor rods to pass through, and the engineering interface is provided with a reserved hole for the installation of the second anchoring device; The traveling hanger is also provided with a support rod connecting the diagonal rod and the connecting rod on the same side, and the support rod is used to reinforce the connection between the diagonal rod and the connecting rod, and prevent the traveling truss from coming out of the side of the traveling hanger when traveling; The lower ends of the oblique rod and the connecting rod are fixed to form a lower end connecting structure, and a roller structure is provided above the connecting structure to assist the walking truss in walking; The roller structure includes a pin and a steel pipe with an outer sleeve, and the outer wall of the pin and the inner wall of the steel pipe are filled with lubricant; A limit block is provided below the traveling hanger, which is used to abut against the connecting structure / roller structure to prevent the traveling truss from falling out of the traveling hanger; When the traveling truss completes the current travel, another traveling hanger is installed at the reserved hole of the next engineering interface in the direction of the bridge deck construction, and the hanging basket moves forward to drive the traveling truss forward, and this cycle is repeated until the bridge deck construction is completed.

2. The bottom basket system of the hanging basket according to claim 1, characterized in that: The bottom basket truss includes a front cross beam, a rear cross beam, and a plurality of longitudinal beams intersecting and connecting the front cross beam and the rear cross beam.

3. The bottom basket system of the hanging basket according to claim 2, characterized in that: The front end of the walking truss is anchored below the front cross beam, and the middle part is anchored below the rear cross beam.

4. The bottom basket system of the hanging basket according to claim 3, characterized in that: The walking truss is perpendicular to the front crossbeam.

5. The bottom basket system of the hanging basket according to claim 3, characterized in that: The group of traveling trusses are evenly arranged below the bottom basket trusses along the axis of the front cross beam.

6. The bottom basket system of the hanging basket according to claim 1, characterized in that: The number of the traveling hangers corresponds one to one to the number of the traveling trusses.

7. A hanging basket for an extra-wide box beam, characterized in that: It adopts the bottom basket system of the hanging basket as described in any one of claims 1-6.

8. The hanging basket for the ultra-wide box beam according to claim 7, characterized in that: The hanging basket also includes a main truss system, which includes a plurality of groups of main truss pieces. The main truss pieces are all arranged at the middle support points of the bridge deck box girder, and each group of main truss pieces are transversely connected.

9. The hanging basket for the ultra-wide box beam according to claim 8, characterized in that: The main truss pieces are all provided with main truss legs, and the main truss legs of the main truss pieces are of different heights.

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