阅读说明：本技术 一种桥面可开启折塔式斜拉桥 (Tower cable-stayed bridge with openable bridge deck ) 是由 宋杰 于 2019-12-12 设计创作，主要内容包括：本发明公开了一种桥面可开启折塔式斜拉桥,包括钢折塔、钢主梁、转动系统、锚碇滑动系统、混凝土主墩和混凝土边墩,所述转动系统包括斜拉索、折塔背索、塔索转动铰、背索张拉系统装置、梁墩转动铰和塔墩转动铰,所述锚碇滑动系统包括活动锚碇结构、水平活动箱室、水平钢滑道和四氟乙烯钢滑块,所述钢折塔正面通过所述斜拉索与所述钢主梁连接,所述钢折塔背面通过所述折塔背索绕过所述塔索转动铰与所述活动锚碇结构连接,本发明满足了通航净空界限要求的特有实现方案,通过索、塔的合理布置达到精妙的力学平衡,通过折塔背索张拉系统装置的竖直方向张拉和活动锚碇结构的水平滑动直接实现钢折塔的转动,间接实现钢主梁桥面的开启。(The invention discloses a bridge deck openable and foldable tower type cable-stayed bridge, which comprises a steel folding tower, a steel main beam, a rotating system, an anchorage sliding system, a concrete main pier and a concrete side pier, wherein the rotating system comprises a stay cable, a folding tower back cable, a tower cable rotating hinge, a back cable tensioning system device, a beam pier rotating hinge and a tower pier rotating hinge, the anchorage sliding system comprises a movable anchorage structure, a horizontal movable box chamber, a horizontal steel slideway and a tetrafluoroethylene steel sliding block, the front surface of the steel folding tower is connected with the steel main beam through the stay cable, the back surface of the steel folding tower is connected with the movable anchorage structure through the folding tower back cable bypassing the tower cable rotating hinge, the special implementation scheme of the navigation clearance limit requirement is met, the delicate mechanical balance is achieved through the reasonable arrangement of cables and the tower, the rotation of the steel folding tower back cable system device is directly realized through the vertical direction of the folding tower back cable system device and the horizontal sliding of the movable anchorage structure, the opening of the steel girder bridge deck is indirectly realized.)

1. The utility model provides a bridge floor can open and roll over tower cable-stay bridge, rolls over tower, steel girder, rotational system, anchorage sliding system, concrete main pier and concrete limit mound, its characterized in that including the steel: rotating system includes suspension cable, book tower back of the body cable, tower cable rotation hinge, back of the body cable stretch-draw system device, beam pier rotation hinge and tower pier rotation hinge, anchorage sliding system includes activity anchorage structure, horizontal activity case room, horizontal steel slide and tetrafluoroethylene steel slider, the steel book tower openly passes through the suspension cable with the steel girder is connected, the steel book tower back passes through book tower back of the body cable is walked around the tower cable rotate hinge with activity anchorage structural connection, the steel book tower bottom passes through the tower pier rotates the hinge with concrete main pier is connected, the steel girder upper surface passes through the suspension cable with the steel book tower is connected, the one end of steel girder lower surface passes through the beam pier rotates the hinge with concrete main pier meets, the other end overlap joint of steel girder lower surface is in the top of concrete side pier.

2. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: the steel folding tower is characterized in that the vertical face of the steel folding tower is linear, the steel folding tower is transversely in a herringbone shape, the steel folding tower is made of Q345qd steel materials, and the section of a tower column of the steel folding tower is in a thin-wall box-shaped structure.

3. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: horizontal steel support rods are welded to the outer sides of the steel folding towers, the cross sections of the horizontal steel support rods are of H-shaped structures, the tower cable rotating hinges are welded to the end portions of the horizontal steel support rods, and the tower cable rotating hinges are made of Q345qd materials.

4. The bridge deck openable and foldable tower type cable-stayed bridge according to claim 1, characterized in that the opening angle of the bridge deck of the steel main beam is α, the horizontal movement stroke of the movable anchorage structure is L, the horizontal projection of the center of gravity of the whole bridge system in the rotation process of the steel main beam does not exceed the vertical center line of the concrete main pier to the side span side, the steel main beam is in a steel box girder type, and the steel main beam is made of Q345qd material.

5. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: the stay cables are arranged in a double-cable-surface semi-sector mode, the stay cables are all parallel steel wire cables, and the stay cables are fork lug bidirectional screw type end heads.

6. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: the upper end of the tower back cable is obliquely connected with the top of the steel folding tower, the middle of the tower back cable is wound around the tower cable rotating hinge, and the lower end of the tower back cable is vertically connected with the back cable tensioning system device at the top of the movable anchorage structure.

7. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: the beam pier rotates the hinge and includes ring flange and axis of rotation, the ring flange is provided with two, a welding in the ring flange is in the lower surface of steel girder, another in the ring flange is inlayed the top of concrete owner mound, the tower pier rotates the hinge and includes ring flange and axis of rotation the ring flange is provided with two, a welding in the ring flange is in the bottom of tower is rolled over to the steel, another in the ring flange is inlayed the top of concrete owner mound, the beam pier rotates the hinge and all adopts Q345qd material with the tower pier rotation hinge to make.

8. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: the bottom of activity anchorage structure is discoid, the middle part of activity anchorage structure is cylindricly, the welding has triangle stiffening rib between the bottom of activity anchorage structure and the middle part, the bottom of activity anchorage structure is located horizontal activity incasement, surface mounting has the tetrafluoroethylene steel slider on the bottom of activity anchorage structure, the top of horizontal activity incasement wall is inlayed and is had horizontal steel slide, the tetrafluoroethylene steel slider with horizontal steel slide contacts, the activity anchorage structure passes through the tetrafluoroethylene steel slider with horizontal steel slide cooperation realizes horizontal motion.

9. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: the bottom of the horizontal movable box chamber is fixedly arranged on a ground foundation through bolts.

10. A bridge deck openable-foldable tower type cable-stayed bridge according to claim 1, wherein: the back cable tensioning system device is pre-buried at the top of the movable anchorage structure.

Technical Field

The invention relates to the technical field of bridge engineering in traffic infrastructure industry, in particular to a tower type cable-stayed bridge with an openable and foldable bridge deck.

Background

Along with the continuous and rapid development of Chinese economy, the urbanization and industrialization process is continuously accelerated, the traffic infrastructure industry develops rapidly, and a large number of municipal roads, highways, railways and rivers form spatial intersection. In view of the fact that river navigation conditions need to be reserved for the development of decades in the future, navigation clearance requirements are high often, dense urban environments are combined, existing complex field conditions are combined, and if the elevation of a full-line overhead or roadbed is improved to meet the requirements of river navigation clearances at specific positions, the construction cost is increased by tens of millions or even hundreds of millions often, engineering materials are wasted, and unnecessary removal is caused.

In order to avoid the increase of engineering cost, material waste and unnecessary removal caused by the lifting of a full-line overhead or a roadbed, only a few cities at home and abroad currently adopt openable bridges to realize navigation. In addition, the folding tower type cable-stayed bridge is built in a single project at home and abroad in recent years, the bridge cable tower adopts a bending mode, back cables are all obliquely and linearly arranged, and if a self-anchoring system is adopted, a section of side span needs to be configured behind the tower; if an external anchor system is adopted, the anchor and the fixed pier foundation act a pair of longitudinal component forces with opposite directions and large magnitude because the back cable is inclined, and the anchor and the fixed pier foundation are very unfavorable. In view of this, a new solution that can be opened on the bridge floor, has novel and definite stress, reasonable and efficient material utilization, good dynamic and static compatibility and landscape performance and meets the requirement of navigation limit is urgently needed to be proposed.

Disclosure of Invention

The invention aims to provide a tower type cable-stayed bridge with an openable and foldable bridge deck, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a bridge deck openable folding tower type cable-stayed bridge comprises a steel folding tower, a steel main beam, a rotating system, an anchorage sliding system, a concrete main pier and a concrete side pier, wherein the rotating system comprises a stay cable, a folding tower back cable, a tower cable rotating hinge, a back cable tensioning system device, a beam pier rotating hinge and a tower pier rotating hinge, the anchorage sliding system comprises a movable anchorage structure, a horizontal movable box chamber, a horizontal steel slideway and a tetrafluoroethylene steel sliding block, the front surface of the steel folding tower is connected with the steel main beam through the stay cable, the back surface of the steel folding tower bypasses the tower cable rotating hinge through the folding tower back cable and is connected with the movable anchorage structure, the bottom of the steel folding tower is connected with the concrete main pier through the tower pier rotating hinge, the upper surface of the steel main beam is connected with the steel folding tower through the stay cable, the lower surface of the steel folding tower is connected with the concrete main pier through the beam pier rotating hinge, the other end of the lower surface of the steel main beam is lapped on the top of the concrete side pier.

The steel folding tower is made of Q345qd steel materials, and the section of the tower column of the steel folding tower is of a thin-wall box-shaped structure.

The outer side of the steel folding tower is welded with a horizontal steel support rod, the section of the horizontal steel support rod is of an H-shaped structure, the tower cable rotating hinge is welded at the end part of the horizontal steel support rod, and the tower cable rotating hinge is made of Q345qd material.

The opening angle of the bridge surface of the steel main beam is α, the horizontal moving stroke of the movable anchor structure is L, the horizontal projection of the gravity center of the whole bridge system does not exceed the vertical central line of the concrete main pier to the side span side in the rotating process of the steel main beam, the steel main beam is in a steel box girder type, and the steel main beam is made of Q345qd materials.

The stay cables are arranged in a double-cable-surface semi-sector mode, the stay cables are all parallel steel wire cables, and the stay cables are fork lug bidirectional screw type end heads.

The upper end of the tower back cable is obliquely connected with the top of the steel folding tower, the middle of the tower back cable is wound around the tower cable rotating hinge, and the lower end of the tower back cable is vertically connected with the back cable tensioning system device at the top of the movable anchorage structure.

Wherein, the beam pier rotates the hinge and includes ring flange and axis of rotation, the ring flange is provided with two, one welding in the ring flange is in the lower surface of steel girder, another in the ring flange is inlayed the top of concrete owner mound, the tower pier rotates the hinge and includes ring flange and axis of rotation the ring flange is provided with two, a welding in the ring flange is in the bottom of steel book tower, another in the ring flange is inlayed the top of concrete owner mound, the beam pier rotates the hinge and all adopts Q345qd material with the tower pier rotation hinge to make.

The bottom of the movable anchorage structure is disc-shaped, the middle of the movable anchorage structure is cylindrical, triangular stiffening ribs are welded between the bottom and the middle of the movable anchorage structure, the bottom of the movable anchorage structure is located in the horizontal movable box chamber, a tetrafluoroethylene steel sliding block is mounted on the upper surface of the bottom of the movable anchorage structure, a horizontal steel slide way is embedded at the top of the inner wall of the horizontal movable box chamber, the tetrafluoroethylene steel sliding block is in contact with the horizontal steel slide way, and the movable anchorage structure is matched with the horizontal steel slide way to achieve horizontal motion through the tetrafluoroethylene steel sliding block.

Wherein, the bottom of the horizontal movable box chamber is fixedly arranged on a ground foundation through bolts.

The back cable tensioning system device is pre-buried at the top of the movable anchorage structure.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention meets the special realization scheme of the requirement of navigation clearance limit, achieves delicate mechanical balance through reasonable arrangement of the cable and the tower, directly realizes the rotation of the steel folding tower through the vertical direction tensioning of the folding tower back cable tensioning system device and the horizontal sliding of the movable anchorage structure, and indirectly realizes the opening of the steel main beam bridge deck; before the ship passes through the bridge, the traffic on the two sides of the bridge is suspended, the back cable is tensioned, the steel folding tower and the steel main beam rotate, the bridge floor is opened, the requirement of a navigation clearance limit is met, the back cable is slowly released after the ship passes through the bridge smoothly, the steel folding tower and the steel main beam rotate to be right, and the traffic on the two sides is recovered.

2. The invention avoids lifting the elevation of the traffic connection line of the two banks, reduces the removal, lowers the manufacturing cost, benefits the society, and the main bridge and the traffic connection bridge of the two banks are synchronously constructed, and the elevation of the traffic connection line of the two banks is avoided from the overall project, so that the engineering volume of the connection overhead frame or the roadbed can be reduced, thereby often saving the construction cost of tens of millions or even hundreds of millions, reducing the removal, having good social benefit and being beneficial to the social stability.

3. The structure of the invention is stressed definitely, the material utilization is reasonable and efficient, in order to solve the problem that the oblique back cable causes longitudinal component force, the back cable at the lower section is changed into the vertical direction by arranging the horizontal stay bar at the back side of the cable tower, so that the stress of the anchor and the fixed pier foundation is vertical, and the longitudinal force is ingeniously eliminated; meanwhile, in the rotating process of the bridge system, the movable anchorage structure slides in the horizontal movable box chamber, so that the tension force of the folding tower back cable can be ensured to be vertical force all the time, and the negative influence of longitudinal force is eliminated.

4. The bridge system of the invention adopts the tower pier rotating hinge, the beam pier rotating hinge and the cable tower rotating hinge, so that the bending moment at the joint is released, the secondary stress and the fatigue stress caused by the bending moment are eliminated, and the hyperstatic frequency of the structural system is reduced.

Drawings

FIG. 1 is a front view of a tower type cable-stayed bridge with an openable and foldable bridge deck according to an embodiment of the present invention;

FIG. 2 is a front view of a tower-type cable-stayed bridge with an openable and foldable bridge deck according to an embodiment of the present invention;

FIG. 3 is a side view of the connection of the pier beams of the tower-type cable-stayed bridge with the bridge deck capable of being opened and folded according to the embodiment of the invention;

FIG. 4 is an enlarged view of the portion A of FIG. 3;

FIG. 5 is a schematic structural diagram of a front view of an anchor sliding system of a tower cable-stayed bridge with a bridge deck capable of being opened and folded according to an embodiment of the invention;

FIG. 6 is a schematic top view of an anchor sliding system of a tower cable-stayed bridge with a bridge deck capable of being opened and folded according to an embodiment of the invention;

FIG. 7 is a schematic side view of an anchor sliding system of a tower cable-stayed bridge with an openable and foldable bridge deck according to an embodiment of the invention.

In FIGS. 1-7: 1-folding a steel tower; 2-a steel girder; 3-horizontal steel stay bars; 4-stay cables; 5-folding a tower back cable; 6-tower cable rotation hinge; 7-a back cable tensioning system device; 8-movable anchorage structure; 9-concrete main pier; 10-concrete side piers; 11-beam pier rotating hinge; 12-tower pier rotating hinge; 13-horizontal steel slides; 14-tetrafluoroethylene steel slider; 15-horizontal movable chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a bridge deck openable and foldable tower type cable-stayed bridge comprises a steel folding tower 1, a steel main beam 2, a rotating system, an anchorage sliding system, a concrete main pier 9 and a concrete side pier 10, wherein the rotating system comprises a stay cable 4, a folding tower back cable 5, a tower cable rotating hinge 6, a back cable tensioning system device 7, a beam pier rotating hinge 11 and a tower pier rotating hinge 12, the anchorage sliding system comprises a movable anchorage structure 8, a horizontal movable box chamber 15, a horizontal steel slideway 13 and a tetrafluoroethylene steel sliding block 14, the front side of the steel folding tower 1 is connected with the steel main beam 2 through the stay cable 4, the back side of the steel folding tower 1 is connected with the movable anchorage structure 8 through the folding tower back cable 5 bypassing the tower cable rotating hinge 6, the bottom of the steel folding tower 1 is connected with the concrete main pier 9 through the tower pier rotating hinge 12, the upper surface of the steel main beam 2 is connected with the steel folding tower 1 through the stay cable 4, 2 lower surfaces of steel girder pass through the beam pier rotate hinge 11 with concrete main pier 9 meets, the other end overlap joint of 2 lower surfaces of steel girder is in the top of concrete limit mound 10, reaches exquisite mechanical balance through the rational arrangement of cable, tower, directly realizes the rotation of steel book tower 1 through the vertical direction stretch-draw of folding back of the tower cable stretch-draw system device 7 and the horizontal slip of activity anchorage structure 8, realizes opening of 2 bridge decks of steel girder indirectly.

The vertical surface of the steel folding tower 1 is linear, the steel folding tower 1 is transversely in a herringbone shape, the steel folding tower 1 is made of Q345qd steel materials, and the cross section of a tower column of the steel folding tower 1 is in a thin-wall box-shaped structure.

The outer side of the steel folding tower 1 is welded with a horizontal steel supporting rod 3, the section of the horizontal steel supporting rod 3 is in an H-shaped structure, the tower cable rotating hinge 6 is welded at the end part of the horizontal steel supporting rod 3, and the tower cable rotating hinge 6 is made of Q345qd material.

In the bridge deck openable folding tower type cable-stayed bridge described in the embodiment, the bridge span is arranged to be 63+10 m. The length of the steel main beam 2 is 73.0m, the height is 2.0m, the width is 8.0m, the total height of the steel folding tower 1 is 38.0m, the length of the horizontal steel stay bar 3 is 14.5m, the height of the concrete main pier 9 and the height of the concrete side pier 10 are 7.5m, the height of the movable anchorage structure is 7.0m, the diameter of the middle cylinder is 2.0m, the diameter of the bottom disc is 6.0m, the size length multiplied by the width multiplied by the height of the horizontal movable box chamber 15 is 13.0 multiplied by 9.0 multiplied by 4.5m respectively, the total number of the full-bridge stay cables is 20, the total number of the folding tower back cables is 1, the parallel steel cables are adopted, and the tensile strength is 1670.

The opening angle of the bridge surface of the steel main beam 2 is α, the horizontal moving stroke of the movable anchor structure 8 is L, the horizontal projection of the gravity center of the whole bridge system in the rotating process of the steel main beam 2 does not exceed the vertical central line of the concrete main pier 9 to the side span side, the steel main beam 2 is in a steel box girder type, and the steel main beam 2 is made of Q345qd materials.

The stay cables 4 are arranged in a double-cable-surface semi-sector mode, the stay cables 4 are all parallel steel wire cables, and the stay cables 4 are fork lug bidirectional screw type ends.

The upper end of the tower back cable 5 is obliquely connected with the top of the steel folding tower 1, the middle of the tower back cable 5 is wound around the tower cable rotating hinge 6, and the lower end of the tower back cable 5 is vertically connected with the back cable tensioning system device 7 at the top of the movable anchor structure 8 in a fixed mode.

Wherein, beam pier rotates hinge 11 and includes ring flange and axis of rotation, the ring flange is provided with two, one of the ring flange is welded the lower surface of steel girder 2, another in the ring flange is inlayed the top of concrete owner mound 9, tower pier rotates hinge 12 and includes ring flange and axis of rotation the ring flange is provided with two, one of the ring flange is welded the bottom of steel book tower 1, another in the ring flange is inlayed the top of concrete owner mound 9, beam pier rotates hinge 11 and tower pier rotates hinge 12 and all adopts Q345qd material to make.

The bottom of the movable anchor structure 8 is disc-shaped, the middle of the movable anchor structure 8 is cylindrical, triangular stiffening ribs are welded between the bottom and the middle of the movable anchor structure 8, the bottom of the movable anchor structure 8 is located in the horizontal movable box chamber 15, a tetrafluoroethylene steel sliding block 14 is installed on the upper surface of the bottom of the movable anchor structure 8, a horizontal steel slideway 13 is embedded at the top of the inner wall of the horizontal movable box chamber 15, the tetrafluoroethylene steel sliding block 14 is in contact with the horizontal steel slideway 13, and the movable anchor structure 8 is in horizontal motion through the tetrafluoroethylene steel sliding block 14 and the horizontal steel slideway 13.

Wherein, the bottom of the horizontal movable box chamber 15 is fixedly installed on the ground foundation through bolts.

The back cable tensioning system device 7 is pre-buried at the top of the movable anchor structure 8.

The concrete construction method of the tower type cable-stayed bridge with the openable and foldable bridge deck comprises the following steps of foundation construction → horizontal movable box chamber 15 and anchorage construction → steel girder 2 construction → steel tower 1 and stay cable 4 construction → bridge reciprocating rotation angle α → bridge formation construction.

(1) Construction of foundations

Firstly, cleaning a field and preparing materials, secondly, constructing a concrete main pier 9, a concrete side pier 10, a bearing platform and a pile foundation on the premise of reliable protective measures, and embedding a tower pier rotating hinge 12 and a beam pier rotating hinge 11 on the concrete main pier 9.

(2) Construction of horizontal movable box chamber 15 and movable anchorage structure 8

Firstly, foundation reinforcement treatment is carried out on the position where the horizontal movable box chamber 15 is located before construction, uneven settlement is caused when the horizontal movable box chamber 15 is placed, secondly, the horizontal movable box chamber 15 and the movable anchorage structure 8 are poured, a horizontal steel slide rail 13 and a tetrafluoroethylene steel slide block 14 are installed, and a back cable tensioning system device 7 is arranged in the movable anchorage structure 8.

(3) Steel girder 2 construction

The sections of the steel main beam 2 are transported, hoisted, erected and welded through construction trestles and floating transportation measures, and a beam pier rotating hinge 11 is arranged between the bottom of the steel main beam 2 and the concrete main pier 9.

(4) Construction of steel folding tower 1 and stay cable 4

The steel folding tower 1 and the horizontal steel support rod 3 are hoisted and erected through crane equipment, a cable tower rotating hinge 6 is welded on site, and a beam pier rotating hinge 6 is installed between the bottoms of the stay cable 4 and the folding tower back cable steel main beam 2 and the concrete main pier 9.

(5) Bridge reciprocating swivel angle α

The rotation of the steel folding tower 1 is directly realized through the vertical direction tensioning of the folding tower back cable tensioning system device 7 and the horizontal sliding of the movable anchorage structure 8, and the opening of the bridge deck of the steel main beam 2 is indirectly realized.

(6) Construction of bridge

After the back-and-forth rotation angle α of the bridge is successfully completed, the bridge construction is completed by constructing the auxiliary structures such as the bridge deck pavement and the railings of the steel girder 2.

It is noted that, herein, 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.