CN113718654B - Installation structure for ropeless beam section of bridge tower area - Google Patents
Installation structure for ropeless beam section of bridge tower area Download PDFInfo
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- CN113718654B CN113718654B CN202111021745.2A CN202111021745A CN113718654B CN 113718654 B CN113718654 B CN 113718654B CN 202111021745 A CN202111021745 A CN 202111021745A CN 113718654 B CN113718654 B CN 113718654B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The invention relates to a mounting structure of a ropeless beam section in a bridge tower area, which comprises two temporary beam rods, wherein the two temporary beam rods are symmetrically arranged between two middle tower columns of a main tower and are positioned above a lower cross beam, and the temporary beam rods are arc-shaped beams which are convex downwards; the diagonal braces are used for supporting the temporary beam on the middle tower column, the diagonal braces are obliquely arranged, and the upper ends of the diagonal braces are uniformly fixed at different positions of the temporary beam; the inclined strut embedded parts are used for being connected with corresponding inclined struts so as to fix the inclined struts relative to the middle tower column; the cable hoisting machines are respectively erected on the two temporary beam rods and can move along the length direction of the temporary beam rods; the temporary guy cable has many, and the upper end is connected respectively on two interim roof beam poles, and the lower extreme is used for being connected with the no cable beam section of treating the installation. The method has the advantages of simple construction process, flexible and convenient construction and synchronous symmetrical construction.
Description
Technical Field
The invention relates to a mounting structure of a ropeless beam section in a bridge tower area.
Background
A cable-stayed bridge is also called a diagonal tension bridge, is a bridge with a main beam directly pulled on a bridge tower by a plurality of guys, and is a structural system formed by combining a pressure-bearing tower, a pulled guy and a bending-bearing beam body. It can be seen as a multi-span elastically supported continuous beam with guy cables instead of buttresses. It can reduce the bending moment in the beam body, reduce the building height, lighten the structure weight and save materials. The cable-stayed bridge mainly comprises a cable tower, a main beam and a stay cable. The cable tower type comprises A type, inverted Y type, H type and single column, and the material comprises steel and concrete. The stay cable is provided with a single cable surface, parallel double cable surfaces, an inclined cable surface and the like.
The pylon is also called a main pylon, for example, an H-shaped single-pylon double-cable-side prestressed concrete cable-stayed bridge main pylon structure disclosed in the grant publication No. CN210507098U, as shown in fig. 1-2, the main pylon structure includes two sets of pylons 2 fixed above a bearing platform 1, a lower pylon 3, a middle pylon 4 and an upper pylon 5 are sequentially connected above each set of pylon 2, the upper, middle and lower pylons are respectively connected and supported by an upper cross beam 6 and a lower cross beam 7, the upper portion of the upper pylon 5 and the upper portion of the middle pylon 4 are pylon anchoring areas of stay cables, anchoring teeth are arranged on the inner wall of the pylon for cable anchoring, and the upper and lower cross beams are both provided with prestressed steel bundles.
For the construction of the non-cable beam section of the large-span cable-stayed bridge, the floor support method is mostly adopted at home and abroad at present, but along with the increase of the length of the cable beam section and the increase of the installation height, the floor support method has the defects of construction period, safety and economy, and when the bridge is positioned in areas with poor basic geological conditions, deep water level and the like, the floor steel pipe support cannot be erected.
The Chongqing Mingshan bridge is a typical example, and belongs to a first large cable-stayed bridge constructed after water storage in a three gorges reservoir area, the longitudinal length of a main pier tower area ropeless beam section is as long as 43m, the height of the bottom of the main pier tower area ropeless beam section from the top of a bearing platform is about 68m, if the bridge is constructed according to a traditional falling support method, because the reservoir area water level change, the main pier structural design is higher and the like, the construction of the tower area ropeless beam section by adopting the method of erecting the falling support has the following defects: the requirement of the length of the ropeless beam section and the requirement of the change according to the height are difficult to adapt; the erection period of the support is long, the erection difficulty is high, cross operation exists, the construction safety risk is high, and a plurality of unforeseeable factors which are not beneficial to engineering construction exist in the aspects of quality, safety and environmental protection; after the support is erected, pre-pressing construction is required, so that time and material are consumed; the investment of the bracket material and the water ship equipment is very large.
Therefore, the chinese patent with application publication No. CN106522101A discloses a construction method of an ultra-long cable-free beam section of a cable-stayed bridge, which mainly comprises the following processes: 1. pre-burying of a bracket embedded part of a non-lock beam section during construction of a lower cross beam, and then completing construction of a main beam, an inclined strut, a parallel connection, a joist, a pad beam and a shoulder pole beam of the bracket; 2. hoisting and mounting five middle steel box girders by using floating crane equipment matched with a bracket, wherein the operations of girder falling, fine adjustment and the like are required in the process; 3. the method comprises the following steps of connecting beam sections, then carrying out tower beam temporary consolidation facility installation construction, adopting a form of temporary guy cables and vertical temporary supports, stretching the temporary guy cables at the bottom of a lower cross beam, connecting the guy cables with a steel box beam through anchoring parts, then carrying out transverse and longitudinal temporary constraint construction on the tower beam, and adopting a permanent wind-resistant support and steel corbels during the construction; 4. assembling a bridge deck crane on the bridge deck in a splicing welding and pin shaft connection mode, wherein floating crane equipment is required to be used for auxiliary allocation and transportation; 5. because the construction process is asymmetric construction, the unbalanced bending moment is reduced by applying or reducing the counter weight; 6. and the subsequent construction also needs to install a cofferdam platform at the bottom of the main tower and assemble a bridge deck crane and the like on the side of the side span. Therefore, the construction method has the advantages of various used equipment quantity, complicated construction process, asymmetrical construction, application and adjustment of the balance weight, long construction period and high cost caused by the use of various equipment.
Disclosure of Invention
The invention aims to provide a mounting structure of a ropeless beam section in a bridge tower area, which has the advantages of simple construction process, flexible and convenient construction and synchronous and symmetrical construction.
The technical scheme of the invention is as follows:
bridge tower district does not have cable beam section mounting structure includes:
the two temporary beam rods are symmetrically arranged between the two middle tower columns of the main tower and are positioned above the lower cross beam, the two temporary beam rods are arranged in parallel, and the temporary beam rods are arc-shaped beams which are convex downwards;
the diagonal braces are used for supporting the temporary beam on the middle tower column, the diagonal braces are obliquely arranged, the upper ends of the diagonal braces are uniformly fixed at different positions of the temporary beam, the lower ends of the diagonal braces are fixed relative to the middle tower column, and the diagonal braces are symmetrically arranged in the extending direction of the bridge floor and the width direction of the bridge floor relative to the main tower;
the inclined strut embedded part is used for being connected with the corresponding inclined strut so as to fix the inclined strut relative to the middle tower column;
the cable hoisting machine is used for transporting the beam sections of the main beam and is respectively erected on two temporary beam rods, the cable hoisting machine can move along the length direction of the temporary beam rods and comprises a sling and a locking mechanism, and the cable hoisting machine can be locked on the temporary beam rods through the locking mechanism;
the interim cable has many, and the upper end is connected respectively on two interim beam poles, and the lower extreme is used for being connected with the no cable beam section of waiting to install, and the width direction symmetry setting of bridge floor is followed to interim cable, and the both ends middle part that every interim cable of group corresponds a no cable beam section sets up in order to be used for hanging the no cable beam section that draws the correspondence.
Furthermore, the diagonal brace and the temporary beam are made of steel.
Furthermore, the inclined strut embedded part comprises a connecting flange plate and a steel corbel arranged on the lower portion of the connecting flange plate and used for supporting the lower end of the inclined strut.
Furthermore, the temporary beam rod is composed of a plurality of I-shaped steels which are stacked up and down, and any two adjacent layers of I-shaped steels are welded and fixed.
Furthermore, the cable hoisting machine comprises a travelling mechanism capable of travelling on the temporary beam and a transverse moving mechanism capable of driving the sling to reciprocate along the width direction of the bridge deck.
Further, the length of each temporary guy cable is equal to the vertical height from the upper end of the temporary guy cable to the bridge floor.
Furthermore, two ends of each temporary beam rod are respectively detachably connected with a stopping structure so as to limit the moving range of the cable hoist.
Furthermore, the diagonal brace comprises a front brace rod and a rear brace rod which are connected to the front side and the rear side of the middle tower column and an inner brace rod which is connected to the inner side of the middle tower column, the front side and the rear side are two sides which are arranged in the direction perpendicular to the extending direction of the bridge deck, and the inner side is one side of the two middle tower columns close to the bridge deck.
The invention has the beneficial effects that: when the installation structure for the cable-free beam section in the bridge tower area is used, complex equipment such as a cable-free beam section bracket, a floating crane and an assembled bridge deck crane is not needed, two parallel temporary beam rods are supported on a middle tower column through the inclined support rods to serve as tracks for the cable-on cranes to move, and the two cable-on cranes can be operated simultaneously, so that the cable-free beam sections on two sides of a main tower can be synchronously constructed. Therefore, when the installation structure of the ropeless beam section in the bridge tower area is used for constructing the ropeless beam section, the installation structure has the advantages of less equipment used for construction, simplicity, flexibility and convenience in operation, simple and efficient construction process, capability of synchronous symmetrical construction without counterweight and the like, and is particularly suitable for construction under the scenes that the height of the ropeless beam section from the top of a bearing platform is high, a landing support is difficult to erect and a reservoir or water depth is deep.
Drawings
FIG. 1 is a front view of a main tower of an H-shaped concrete cable-stayed bridge according to the prior art;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a schematic structural diagram of an embodiment of the installation structure of the ropeless beam section in the bridge tower area (Z1 block and B1 block are being constructed);
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a state diagram when Z2 and B2 blocks are constructed;
FIG. 6 is a state diagram when Z3 and B3 blocks are constructed;
FIG. 7 is a state diagram of the ropeless beam segment after the construction and before the temporary beam is removed;
FIG. 8 is a front view of a main tower in which the installation structure of a ropeless beam section in a bridge tower area according to the present invention is used;
FIG. 9 is an enlarged view of a portion of FIG. 8 at B;
in the figure: 1-a bearing platform; 2-a tower base; 3, lowering the tower column; 4-middle tower column; 5, mounting a tower column; 6-upper cross beam; 7-a lower cross beam; 10-temporary beam rods, 11-diagonal braces, 111-front and rear braces, 112-inner braces, 12-diagonal embedded parts, 13-cable hoisting machines, 131-slings, 14-temporary guys, 15-ropeless beam sections and 16-transport ships.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, not by way of limitation, i.e., the embodiments described are intended as a selection of the best mode contemplated for carrying out the invention, not as a full mode. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The invention discloses an implementation mode of a mounting structure of a ropeless beam section in a bridge tower area, which comprises the following steps: as shown in fig. 3 and 7, the installation structure of the ropeless beam section in the bridge tower area includes two temporary beams 10, a plurality of diagonal braces 11 and corresponding diagonal embedded parts 12, two cable cranes 13 running on the temporary beams 10, and a plurality of temporary cables 14 arranged on the temporary beams 10 and respectively corresponding to the ropeless beam sections 15.
The two temporary beam rods 10 are symmetrically arranged between the two middle tower columns 4 of the main tower and are positioned above the lower cross beam 7, the two temporary beam rods 10 are arranged in parallel, and the temporary beam rods 10 are arc-shaped beams protruding downwards; the diagonal braces 11 are used for supporting the temporary beam rods 10 on the middle tower column 4, the diagonal braces 11 are obliquely arranged, the upper ends of the diagonal braces 11 are uniformly fixed at different positions of the temporary beam rods 10, the lower ends of the diagonal braces 11 are fixed relative to the middle tower column 4, and the diagonal braces 11 are symmetrically arranged in the extending direction of the bridge floor and the width direction of the bridge floor relative to the main tower; the inclined strut embedded parts 12 are used for being connected with corresponding inclined struts 11 so as to fix the inclined struts 11 relative to the middle tower column 4; the cable hoist 13 is used for transporting the beam sections of the main beam, and is provided with two cable hoists which are respectively erected on two temporary beam rods 10, the cable hoist 13 can move along the length direction of the temporary beam rods 10, the cable hoist 13 comprises a sling 131 and a locking mechanism, and the cable hoist 13 can be locked on the temporary beam rods 10 through the locking mechanism; the temporary guy cables 14 are multiple, the upper ends of the temporary guy cables are connected to the two temporary beam rods 10 respectively, the lower ends of the temporary guy cables are used for being connected with the ropeless beam sections 15 to be installed, the temporary guy cables 14 are symmetrically arranged along the width direction of the bridge floor, and the middle parts of the two ends of each group of temporary guy cables 14, corresponding to one ropeless beam section 15, are arranged for hoisting and pulling the corresponding ropeless beam sections 15.
In this embodiment, the diagonal brace 11 and the temporary beam 10 are made of steel. The inclined strut embedded part 12 comprises a connecting flange plate and a steel corbel arranged at the lower part of the connecting flange plate and used for supporting the lower end of the inclined strut 11. The temporary beam 10 is formed by a plurality of i-beams stacked in the vertical direction, and any two adjacent layers of i-beams are welded and fixed. The cable hoist 13 includes a traveling mechanism that travels on the temporary beam 10 and a traversing mechanism that drives the hoist cable 131 to reciprocate in the width direction of the bridge deck. The length of each temporary guy cable 14 is equal to the vertical height from the upper end of the temporary guy cable 14 to the bridge deck. Stop structures are detachably connected to both ends of each temporary beam 10 to limit the moving range of the cable hoist 13. The diagonal brace 11 includes a front brace 111 connected to the front side and a rear brace 111 connected to the rear side of the middle tower column 4, and an inner brace 112 connected to the inner side of the middle tower column 4, the front side and the rear side are two sides arranged perpendicular to the extending direction of the bridge deck, and the inner side is one side of the two middle tower columns 4 close to the bridge deck.
The construction process is as follows:
step one, erection and installation of temporary beam rod 10 and upper cable hoist 13 thereof
As shown in fig. 3, 4, and 8, first, when constructing the middle tower column 4 of the main tower, the construction of the inclined strut embedded part 12 is performed, which includes the embedded steel bar frames, the connecting flange plates, the steel corbels, and the like, so that the inclined strut embedded part 12 is firmly fixed on the middle tower column 4, wherein the embedded steel bar frames need to be welded or tied with the steel reinforcement cages in the middle tower column 4.
Then, according to the design size, the lower ends of the front and rear support rods 111 and the inner support rods 112 corresponding to each temporary beam 10 are fixedly connected with respect to the corresponding inclined strut embedded part 12 with the aid of a lifting device, for example, a flange and a plurality of bolts which are uniformly and densely arranged are used for connection, or a welding manner is used, and when the connection is performed, the angle of the inclined support rods 11 is basically the same as the design.
Then two temporary beam rods 10 are sequentially installed, the temporary beam rods 10 are machined to be in the required radian, each temporary guy cable 14 is installed at a corresponding position or the temporary guy cable 14 is connected after the temporary beam rods 10 are installed, each temporary beam rod 10 is a bearing piece with high structural strength, for example, a bearing beam formed by stacking and welding or connecting a plurality of I-shaped steel bars is adopted, after the temporary beam rods 10 are lifted in place, each inclined stay rod 11 is fixed at the lower part of each temporary beam rod 10 in a welding or bolt connection mode to support the temporary beam rods 10, a semi-cylindrical or tile-shaped steel sheet can be welded at the upper part of each inclined stay rod 11 to serve as a support plate for supporting the temporary beam rods 10, bolt holes need to be reserved at the corresponding positions of the temporary beam rods 10 when bolt connection is adopted, and then the tile-shaped support plate is connected with the temporary beam rods 10 through a plurality of bolts. Since the diagonal stay 11 is obliquely arranged and is in a state of being inclined in both directions, interference is not caused to the temporary stay 14 connected to the temporary beam 10. In fig. 3, half of the tower is shown hidden, and the temporary beam 10 and other structures between the two towers can be seen. In fact, as shown in fig. 8, the two temporary beams 10 are symmetrically arranged in the width direction of the bridge deck, and the two temporary beams 10 are arranged close to the inner side surface of the corresponding middle tower column 4. Secondly, as shown in fig. 3, each temporary beam 10 is also symmetrical back and forth in the length direction of the bridge deck, i.e. the heights of the two ends of the temporary beam 10 are consistent.
After the temporary beam rods 10, the diagonal braces 11 and the temporary guys 14 are fixed, respectively installing a cable hoist 13 at each end of the temporary beam rods 10, respectively, and movably connecting the traveling mechanisms at each end of the cable hoist 13 to the corresponding temporary beam rods 10, wherein the two temporary beam rods 10 are in a parallel state, so that the cable hoist 13 can smoothly move along the length direction of the temporary beam rods 10 and keep a horizontal state in the moving process, and when the cable hoist 13 moves to a certain position and stops running, the locking mechanism on the cable hoist automatically locks the traveling mechanism, thereby ensuring that the cable hoist 13 does not move any more. The corresponding traversing mechanism and the suspension cable 131 of the cable hoist 13 are installed together with the cable hoist 13.
Step two, installation of the ropeless beam section
As shown in fig. 3, depending on the site conditions, if there is more water at the main tower, the funicular sections 15 can be transported using transport vessels 16, and if there is less or no water, the funicular sections 15 can be transported using land transport machinery. The mode is shown as a transport ship 16 transport mode, a No. 0 block of a ropeless beam section 15 is transported to the position near a bearing platform 1 of a main tower or the position near a lower tower column 3 close to the main tower and is positioned below one of cable lifting machines 13, the cable lifting machine 13 on the corresponding side is started to move to a proper position, a lifting sling 131 is put down to be connected with the No. 0 block and lifts the No. 0 block to a corresponding installation position right above a lower cross beam 7, then the cable lifting machines 13 are reset, two transport ships 16 are respectively opened to the positions right below the two cable lifting machines 13, two persons operate simultaneously, the Z No. 1 block and the B No. 1 block are synchronously lifted to the positions on the front side and the rear side of the No. 0 block, then the temporary cables 14 above the Z No. 1 block and the B No. 1 block are respectively connected with reserved lifting structures on the Z No. 1 block and the B No. 1 block, so that the Z No. 1 block and the No. 1 block can be suspended on a temporary beam rod 10 by the temporary cables 14, and the temporary cables 15 of each ropeless beam section 15 are respectively connected to the two temporary beam sections 10 in a symmetrical mode, the corresponding to the two temporary lifting ropes 15 and the temporary blocks 14 are respectively, and the two temporary lifting ropes 15 are respectively in a horizontal state of the No. 1 beam section 15, and the temporary lifting structure is adopted.
Then, the same method is adopted to complete the installation of the block No. Z2 and the block No. B2 (shown in FIG. 5), the block No. Z3 and the block No. B3 (shown in FIG. 6), and the block No. Z4 and the block No. B4 (shown in FIG. 7) in pairs.
After all subsequent operations are completed and closure is successful, the cable hoist 13, the temporary inhaul cable 14, the inclined stay bar 11, the temporary beam rod 10 and the like can be sequentially dismounted.
When the installation structure of the cable-free beam section in the bridge tower area is used, a cable-free beam section bracket, a floating crane device, a bridge deck crane and other complex devices are not required to be erected, and only two parallel temporary beam rods 10 are required to be supported on the middle tower column 4 through the inclined strut 11 to serve as a track for movement of the cable-free beam section 13, and the two cable-free beam sections 13 can be operated simultaneously, so that synchronous construction of the cable-free beam sections 15 on two sides of the main tower can be performed synchronously, and meanwhile, the temporary beam rods 10 can also serve as upper bearing beams of the temporary cables 14, so that the cable-free beam sections 15 of the cable-stayed bridge can be constructed in a manner similar to suspension beam sections of the cable-stayed bridge, and on the other hand, because the temporary beam rods 10 are required to bear large downward pressure from the cable-free beam sections 13, on the premise of being supported by the inclined strut 11, the temporary beam rods 10 are designed into an upward-tilting and downward-protruding shape, so that a part of the pressure from the cable-free beam sections 13 can be directly transmitted to the temporary beam columns 4, and the capacity of the temporary beam sections 10 is greatly improved. Therefore, when the installation structure of the ropeless beam section in the bridge tower area is used for constructing the ropeless beam section 15, the installation structure has the advantages of less equipment used for construction, simplicity, flexibility and convenience in operation, simple and efficient construction process, capability of synchronous symmetrical construction without counterweight and the like, and is particularly suitable for construction under the scenes that the height of the ropeless beam section 15 from the top of the bearing platform 1 is high, a landing support is difficult to erect and a reservoir or water depth is deep.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (8)
1. Bridge tower district does not have cable beam section mounting structure, its characterized in that includes:
the two temporary beam rods are symmetrically arranged between the two middle tower columns of the main tower and are positioned above the lower cross beam, the two temporary beam rods are arranged in parallel, and the temporary beam rods are arc-shaped beams protruding downwards;
the diagonal braces are used for supporting the temporary beam on the middle tower column, the diagonal braces are obliquely arranged, the upper ends of the diagonal braces are uniformly fixed at different positions of the temporary beam, the lower ends of the diagonal braces are fixed relative to the middle tower column, and the diagonal braces are symmetrically arranged in the extending direction of the bridge floor and the width direction of the bridge floor relative to the main tower;
the inclined strut embedded parts are used for being connected with corresponding inclined struts so as to fix the inclined struts relative to the middle tower column;
the cable hoisting machine is used for transporting a cable-free beam section of the main beam and is respectively erected on two temporary beam rods, the cable hoisting machine can move along the length direction of the temporary beam rods and comprises a sling and a locking mechanism, and the cable hoisting machine can be locked on the temporary beam rods through the locking mechanism;
the temporary guy cables are multiple in number, the upper ends of the temporary guy cables are connected to the two temporary beam rods respectively, the lower ends of the temporary guy cables are used for being connected with the ropeless beam sections to be installed, the temporary guy cables are symmetrically arranged along the width direction of the bridge floor, and the middle parts of the two ends, corresponding to one ropeless beam section, of each group of temporary guy cables are arranged to be used for hanging and pulling the corresponding ropeless beam sections.
2. The installation structure of the ropeless beam section in a bridge tower area according to claim 1, wherein the diagonal brace and the temporary beam are made of steel.
3. The installation structure of the ropeless beam section in the tower area of a bridge according to claim 1, wherein the inclined strut embedded parts comprise a connecting flange plate and a steel corbel arranged at the lower part of the connecting flange plate and used for supporting the lower end of the inclined strut.
4. The installation structure of the ropeless beam section in the bridge tower area according to claim 1, wherein the temporary beam rod is formed by a plurality of i-shaped steel beams which are stacked up and down, and any two adjacent layers of i-shaped steel beams are welded and fixed.
5. The installation structure of the ropeless beam section in the tower area of a bridge as claimed in claim 1, wherein the cable hoist comprises a traveling mechanism capable of traveling on the temporary beam and a traversing mechanism capable of driving the suspension cable to reciprocate in the width direction of the bridge deck.
6. The bridge tower area ropeless beam section installation structure of claim 1, wherein the length of each temporary guy cable is equal to the vertical height from the upper end of the temporary guy cable to the bridge deck.
7. The installation structure of the ropeless beam section in the tower area of a bridge as claimed in claim 1, wherein the temporary beam rods are detachably connected with blocking structures at both ends thereof respectively to limit the moving range of the cable hoist.
8. The bridge tower region ropeless beam segment installation structure of claim 1, wherein the diagonal braces comprise front and rear braces connected to front and rear sides of the middle tower column, and inner braces connected to inner sides of the middle tower column, the front and rear sides being two sides disposed perpendicular to an extending direction of the bridge deck, and the inner sides being sides of the two middle tower columns near the bridge deck.
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| CN202111021745.2A CN113718654B (en) | 2021-09-01 | 2021-09-01 | Installation structure for ropeless beam section of bridge tower area |
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| CN202111021745.2A CN113718654B (en) | 2021-09-01 | 2021-09-01 | Installation structure for ropeless beam section of bridge tower area |
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| CN113718654B true CN113718654B (en) | 2022-11-22 |
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