Temporary locking method for upper and lower rotating discs of swivel cable-stayed bridge

Abstract

The application relates to a temporary locking method of upper and lower rotating discs of a swivel cable-stayed bridge, which comprises the following steps: installing the lower rotating disc, installing a slide and a lower spherical hinge in the lower rotating disc, arranging a plurality of steel pipe columns with cavities on the outer periphery of the lower spherical hinge; installing the upper spherical hinge on the lower spherical hinge, installing a plurality of supporting feet in the slide, and integrally pouring the upper ends of the plurality of steel pipe columns, the upper ends of the plurality of supporting feet and the upper spherical hinge with the upper rotating disc, so that the plurality of steel pipe columns form a temporary locking structure connecting the upper rotating disc and the lower rotating disc; filling the steel pipe columns with concrete in the process of constructing the tower column and the main beam on the upper rotating disc, so that the steel pipe columns and the concrete form a steel pipe concrete column; removing the temporary locking structure between the upper rotating disc and the lower rotating disc, and rotating the main beam. Since the vertical load is mainly borne by the spherical hinge during the construction of the bridge, the steel pipe columns bear less load and are not easy to be damaged, and the steel pipe columns are filled with concrete according to the load borne by the steel pipe columns, so that the steel pipe concrete column bears greater load.

Description

Technical Field

[0001] This application relates to the field of bridge engineering construction technology, specifically to a temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge. Background Technology

[0002] To minimize the impact on existing operational lines, bridge rotation construction is often the preferred or even mandatory solution when crossing existing railway lines, highways, etc. The rotation device of a swing bridge consists of an upper turntable, a lower turntable, a ball joint, a sliding track, and a traction device. During the construction of the structure above the upper turntable, the upper and lower turntables need to be temporarily locked.

[0003] In related technologies, a common temporary locking method for the upper and lower turntables of a swing bridge is to install a ring of pressure sand boxes around the top of the slide. However, the sand boxes will compress and deform under pressure and are not easy to recover. In each construction stage, although the multiple sand boxes and ball joints on the slide share the force, the magnitude of the force on each sand box may be different at different stages. That is, the cumulative deformation of each sand box is not the same, which leads to an unclear load distribution relationship in each sand box. One or several sand boxes may be damaged due to excessive load, which may cause the upper and lower turntables to rotate relative to each other or overturn. Summary of the Invention

[0004] This application provides a temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge, which can solve the technical problem in related technologies that one or more sand boxes located in the slide may be damaged due to excessive load, which may cause the upper and lower turntables to rotate relative to each other or overturn.

[0005] In a first aspect, embodiments of this application provide a temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge, comprising the following steps: installing the lower turntable, and installing a slide rail and a lower ball joint in the lower turntable; arranging multiple steel pipe columns with cavities on the outer periphery of the lower ball joint; installing the upper ball joint on the lower ball joint, and installing multiple support legs in the slide rail; casting the upper ends of the multiple steel pipe columns, the upper ends of the multiple support legs, and the upper ball joint integrally with the upper turntable, so that the multiple steel pipe columns form a temporary locking structure connecting the upper and lower turntables; filling concrete into the steel pipe columns during the construction of the tower columns and main beams on the upper turntable, so that the steel pipe columns and concrete form a steel-concrete composite column; releasing the temporary locking structure between the upper and lower turntables, and rotating the main beam.

[0006] In conjunction with the first aspect, in one embodiment, the upper turntable includes an outer ring structure and an inner ring structure. The step of casting the upper ends of the multiple steel pipe columns, the upper ends of the multiple support legs, and the upper ball joint into the upper turntable to form a temporary locking structure connecting the upper and lower turntables includes: casting the upper ends of the multiple support legs into the inner ring structure of the upper turntable, and simultaneously casting the upper ends of the multiple steel pipe columns into the outer ring structure of the upper turntable.

[0007] In conjunction with the first aspect, in one embodiment, the step of casting the upper ends of the multiple support legs and the inner ring structure of the upper turntable as one unit, and simultaneously casting the upper ends of the multiple steel pipe columns and the outer ring structure of the upper turntable as one unit, includes: connecting two adjacent steel pipe columns through a "Z"-shaped connection system; and connecting each steel pipe column to the inner ring structure through a steel structure.

[0008] In conjunction with the first aspect, in one embodiment, the construction of the tower column and main beam on the upper turntable, and the filling of concrete into the steel pipe column to form a steel-concrete composite column, includes: calculating the load-bearing capacity of multiple steel pipe columns, and filling concrete into the steel pipe column when the tower column and main beam have been constructed to a predetermined scale.

[0009] In conjunction with the first aspect, in one embodiment, releasing the temporary locking structure between the upper and lower turntables and rotating the main beam includes: setting jacks between the upper and lower turntables, with one end of the jacks attached to the lower turntable; using the jacks to lift the upper turntable and cut each steel-concrete column; then controlling all jacks to synchronously return oil, causing the upper turntable to slowly descend; and rotating the main beam after the upper turntable has descended to a stable state.

[0010] In conjunction with the first aspect, in one embodiment, a grid plate is welded to one end of the steel pipe column, and the upper ends of multiple steel pipe columns, the upper ends of multiple support legs, and the upper ball joint are all cast together with the upper turntable to form a temporary locking structure connecting the upper and lower turntables, including: casting the steel pipe column with the grid plate welded to it together with the upper turntable.

[0011] In conjunction with the first aspect, in one embodiment, each steel pipe column is connected to embedded parts at both ends, the embedded parts at both ends of each steel pipe column extend into the upper turntable and the lower turntable respectively, and steel mesh is arranged on the side of the embedded parts away from the steel pipe column.

[0012] In conjunction with the first aspect, in one embodiment, the upper turntable is provided with multiple grouting holes and multiple venting holes. The grouting holes and venting holes are all connected to the cavities inside the steel pipe columns, and each steel pipe column cavity is connected to at least one grouting hole and at least one venting hole. The construction of the tower column on the upper turntable and the filling of concrete into the steel pipe column to form a steel-concrete composite column includes: filling concrete into the steel pipe column through the grouting holes and vibrating the concrete inside the steel pipe column to form a steel-concrete composite column.

[0013] In conjunction with the first aspect, in one embodiment, before installing the lower turntable, and installing the slide rail and lower ball joint in the lower turntable, and arranging multiple steel pipe columns with cavities on the outer periphery of the lower ball joint, the method includes: installing strain gauges on the outer side wall of each steel pipe column.

[0014] In conjunction with the first aspect, in one embodiment, each steel pipe column has a reinforcing bar welded to one end along its inner wall, the reinforcing bar extending along the axial direction of the steel pipe column, and the step of casting the upper ends of multiple steel pipe columns, the upper ends of multiple support legs, and the upper ball joint into an integral part with the upper turntable, so that multiple steel pipe columns form a temporary locking structure connecting the upper turntable and the lower turntable, includes: casting the reinforcing bar in the steel pipe column into an integral part with the upper turntable.

[0015] The beneficial effects of the technical solutions provided in this application include at least the following:

[0016] By utilizing multiple steel pipe columns to form a temporary locking structure connecting the upper and lower turntables, the steel pipe columns can undergo elastic deformation within the allowable load. When the multiple steel pipe columns located between the upper and lower turntables are subjected to forces of different magnitudes, they can partially recover after compression, making them less prone to damage due to cumulative deformation. When the steel pipe columns bear a large load, they can deform, at which point the gap between the upper and lower ball joints can be eliminated as much as possible, meaning they can fit more tightly. This allows the upper and lower ball joints to bear the vertical load primarily during bridge construction, while the steel pipe columns can withstand less load and are less prone to damage. Furthermore, by pouring concrete into the steel pipe columns during bridge construction according to the load they bear, the steel-concrete composite columns can withstand even greater loads, further reducing their susceptibility to damage. This solves the technical problem in related technologies where one or more sand boxes located in the slide may be damaged due to excessive load, potentially causing relative rotation or overturning of the upper and lower turntables. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating the temporary locking method provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the overall structure of the rotating cable-stayed bridge provided in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the connection between the upper and lower turntables provided in an embodiment of this application;

[0021] Figure 4 A schematic diagram of the connection between the upper and lower turntables provided in an embodiment of this application;

[0022] Figure 5 A top view of the connection between the upper and lower turntables provided in an embodiment of this application;

[0023] Figure 6 A top view of the structure in which jacks are arranged between the upper and lower turntables, as provided in an embodiment of this application;

[0024] Figure 7 This is a structural schematic diagram of a steel-concrete composite column provided in an embodiment of this application;

[0025] Figure 8 for Figure 7 Sectional view of AA;

[0026] Figure 9 for Figure 7 Sectional view of BB;

[0027] Figure 10 for Figure 7 A sectional view of CC.

[0028] In the picture:

[0029] 1. Lower turntable; 11. Slide; 12. Support legs;

[0030] 21. Lower ball joint; 22. Upper ball joint;

[0031] 3. Steel pipe column; 31. Grid slab; 32. Vent hole; 33. Grouting hole; 34. Strain gauge; 35. Reinforcing steel bar;

[0032] 4. Upper turntable; 41. Outer ring structure; 42. Inner ring structure;

[0033] 5. Concrete-filled steel tubular columns;

[0034] 6. Connection system;

[0035] 7. Steel structure;

[0036] 8. Jack;

[0037] 9. Embedded parts; 91. Steel mesh;

[0038] 101. Tower column; 102. Main beam. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0040] This application provides a temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge, which can solve the technical problem in related technologies that one or more sand boxes located in the slide may be damaged due to excessive load, which may cause the upper and lower turntables to rotate relative to each other or overturn.

[0041] See Figures 1 to 4 The image shows a temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge, provided in an embodiment of this application. This method may include the following steps:

[0042] S1: Install the lower turntable 1, and install the slide rail 11 and the lower ball joint 21 in the lower turntable 1. Arrange multiple steel pipe columns 3 with cavities on the outer periphery of the lower ball joint 21. That is, during the process of pouring the lower turntable 1 into the foundation pile, the slide rail 11, the ball joint and the steel pipe columns 3 can be poured at the same time with the lower turntable 1, so that the ball joint and the steel pipe columns 3 both extend out of the upper surface of the lower turntable 1, and the slide rail 11 is exposed from the upper surface of the lower turntable 1.

[0043] S2: Install the upper ball joint 22 onto the lower ball joint 21, and install multiple support legs 12 in the slide rail 11. Cast the upper ends of multiple steel pipe columns 3, the upper ends of multiple support legs 12, and the upper ball joint 22 into the upper turntable 4 as one piece, so that the multiple steel pipe columns 3 form a temporary locking structure connecting the upper turntable 4 and the lower turntable 1. That is, at this time, the two ends of the steel pipe columns 3 extend into the upper turntable 4 and the lower turntable 1 respectively. Under the action of the steel pipe columns 3, the upper turntable 4 and the lower turntable 1 are locked. This method can avoid relative rotation between the upper turntable 4 and the lower turntable 1 as much as possible. Preferably, the steel pipe columns 3 are perpendicular to the upper turntable 4 and the lower turntable 1 respectively.

[0044] S3: During the construction of tower column 101 and main beam 102 on the upper turntable 4, concrete is filled into the steel pipe column 3 to form a steel-concrete composite column 5. Afterwards, the main beam 102 can be constructed using a cantilever formwork to the closure section. During the construction of the main structure of the bridge (i.e., tower column 101 and main beam 102, etc.), as the main structure is gradually completed, the vertical load and unbalanced load on the upper turntable 4 increase, causing the load on the spherical hinge structure and the steel-concrete composite column 5 to increase accordingly. When the main structure reaches a certain scale, due to the relatively low stiffness of the steel pipe column 3, it can deform under load. At this time, the support force between the upper turntable 4 and the lower turntable 1 is reduced, causing the upper spherical hinge 22 and the lower spherical hinge... The spherical joints 21 and 22 can fit together tightly and eliminate any possible gaps, so that the spherical joint structure composed of the upper spherical joint 22 and the lower spherical joint 21 and the steel pipe column 3 can share the load. At this time, the spherical joint structure bears most of the load. As the main structure continues to be built, when the main structure reaches another scale, concrete can be poured into the steel pipe column 3. Preferably, the filling concrete is non-shrink concrete. Since the steel pipe concrete column 5 has strong rigidity and its bearing capacity is also increased compared to the steel pipe column 3, the rigidity and bearing capacity of the steel pipe concrete column 5 are increased after its formation, which can meet the stress requirements. The bearing capacity of the upper turntable 4 also gradually increases, and the compressive deformation of the steel pipe concrete column can be reduced at this stage.

[0045] S4: Release the temporary locking structure between the upper turntable 4 and the lower turntable 1, and rotate the main beam 102. That is, multiple steel-concrete composite columns 5 can be cut off before rotating the bridge.

[0046] This embodiment utilizes multiple steel pipe columns 3 to form a temporary locking structure connecting the upper turntable 4 and the lower turntable 1. Since the steel pipe columns 3 exhibit elastic deformation within the allowable load, when the multiple steel pipe columns 3 located between the upper turntable 4 and the lower turntable 1 are subjected to forces of varying magnitudes, each steel pipe column 3 may deform to different degrees. However, because the load-bearing capacity of the steel pipe columns 3 is within the allowable load, as the main structure continues to be constructed, the proportion of pressure on the steel pipe columns 3 that may have previously experienced a larger proportion of stress decreases, and the deformation that occurred previously may recover to varying degrees. After the load-bearing condition of each steel pipe column 3 changes, it is less likely that the steel pipe columns 3 will be damaged due to cumulative deformation. Furthermore, during construction, the temporary locking structure is a variable stiffness structure. When the temporary locking structure consists of multiple steel pipe columns 3, before the steel pipe columns 3 are filled with concrete, the steel pipe columns... The stiffness of column 3 is relatively small, and it is easy to deform under load. At this time, the base plate between the upper ball joint 22 and the lower ball joint 21 is closely fitted to eliminate any possible gaps and minimize inelastic deformation. At this time, the vertical load is mainly borne by the ball joint structure and supplemented by the steel pipe column 3. When the main structure is constructed to a certain scale, the load borne by the ball joint structure and the steel pipe column 3 increases due to the increase in vertical load and unbalanced load. At this time, non-shrink concrete is filled into the steel pipe column 3, which increases the stiffness and design bearing capacity of the steel pipe concrete column 5 to meet the stress requirements. Since the steel pipe column 5 is filled with concrete, it has greater rigidity. During the construction of the main structure, the ball joint structure can bear the main load. Therefore, the steel pipe column 3 is not easy to be damaged due to excessive load. That is, the temporary locking structure formed by multiple steel pipe columns 3 can effectively prevent relative rotation of the upper and lower turntables. This solves the technical problem in the related technology that one or more sand boxes located in the slide 11 may be damaged due to excessive load, which may cause the upper and lower turntables to rotate relative to each other or overturn.

[0047] If non-shrink concrete is filled into the steel pipe column 3 before the construction of tower column 101, the load borne by the steel pipe concrete column 5 and the load borne by the ball joint structure are always distributed in a fixed ratio, and the ratio of the load borne by the steel pipe concrete column 5 and the ball joint structure is relatively close. As the main structure of the bridge is gradually completed, the load borne by both the steel pipe concrete column 5 and the ball joint structure increases. At this time, because the load borne by the steel pipe concrete column 5 and the ball joint structure are always distributed in a fixed ratio, the load borne by the steel pipe concrete column 5 is also larger, resulting in greater stress in the steel pipe concrete column 5. The load on the steel pipe column 3 acts on the upper turntable 4. When the load on the steel pipe column 3 is large, the shear and punching shear resistance of the concrete of the upper turntable 4 is difficult to meet the specifications, and the concrete stress of the upper turntable 4 is large, which is unfavorable to the structural stress. In this embodiment, the steel pipe column 3 is set as a variable stiffness structure. When the upper turntable 4 is just completed and the rest of the main structure of the bridge has not yet been constructed, the steel pipe column... The load borne by column 3 and the load borne by the ball joint structure are also distributed in a fixed proportion. At this time, the stiffness of column 3 is relatively small, so the proportion of load distributed to column 3 is also relatively small. As the main structure of the bridge is constructed, the load borne by column 3 and the ball joint structure gradually increases, but the proportion of load borne by the two remains unchanged. When concrete is filled into column 3 to make it a concrete-filled steel tube column 5, the load borne by column 5 is distributed in a larger proportion than that of column 3 before. When the main structure is built to a certain scale, column 3 will deform, which can make the upper ball joint 22 and the lower ball joint 21 fit more tightly, which means that the proportion of load borne by the ball joint structure can be further increased. Compared with filling column 3 with non-shrink concrete before the construction of tower column 101, setting column 3 as a variable stiffness structure can distribute more load to the ball joint structure. This makes column 5 not only more stable, but also allows for the use of fewer columns 5 as temporary locking structures.

[0048] See Figure 4 As shown, in some optional embodiments, the upper turntable 4 includes an outer ring structure 41 and an inner ring structure 42. The upper ends of the multiple steel pipe columns 3, the upper ends of the multiple support legs 12, and the upper ball joint 22 are all cast together with the upper turntable 4 to form a temporary locking structure connecting the upper turntable 4 and the lower turntable 1. This includes: casting the upper ends of the multiple support legs 12 together with the inner ring structure 42 of the upper turntable 4. Since the support legs 12 are installed on the slide rail 11, that is, the support legs 12 and the slide rail 11 are installed on the inner ring structure 42 at this time, so that the bridge can be more stable when rotating. Casting the upper ends of the multiple steel pipe columns 3 together with the outer ring structure 41 of the upper turntable 4, the steel pipe columns 3 are set on the outer ring structure 41, which allows for the installation of fewer steel pipe columns 3 while meeting the load-bearing requirements of the steel pipe columns 3, thus saving materials.

[0049] See Figure 5 and Figure 6 As shown, in some optional embodiments, the upper ends of the multiple support legs 12 are cast integrally with the inner ring structure 42 of the upper turntable 4, and the upper ends of the multiple steel pipe columns 3 are cast integrally with the outer ring structure 41 of the upper turntable 4. This includes: connecting two adjacent steel pipe columns 3 through a "Z"-shaped connecting system 6; and connecting each steel pipe column 3 to the inner ring structure 42 through a steel structure 7. That is, the temporary locking structure is provided with a connecting system 6 and a steel structure 7. The connecting system 6 and the steel structure 7 enable the upper turntable 4 to withstand a larger amount of gravity load. The "Z"-shaped connecting system 6 can further enhance its stability. Both the connecting system 6 and the steel structure 7 can be made of shaped steel. Since shaped steel itself has good seismic performance, the upper turntable 4 can maintain a relatively stable state during the construction of the main structure located on the upper turntable 4.

[0050] In some optional embodiments, the construction of the tower column 101 and main beam 102 on the upper turntable 4, and the filling of concrete into the steel pipe column 3 to form a steel-concrete composite column 5, includes: calculating the load-bearing capacity of multiple steel pipe columns 3, and filling concrete into the steel pipe column 3 when the tower column 101 and main beam 102 have been constructed to a predetermined scale. It should be understood that the aforementioned expected height can refer to the completion of the main structure construction or any stage in the main structure construction process. Determining whether the tower column 101 has been constructed to this scale can also be calculated according to a set formula. The formula for calculating the compressive stiffness K of the steel pipe column 3 and the ball-joint structure (hereinafter referred to as the component) is:

[0051]

[0052] in:

[0053] N is the load borne by the component;

[0054] Δl represents the amount of compressive deformation of the component;

[0055] E is the elastic modulus of the component;

[0056] A is the area of ​​the component;

[0057] h is the height of the component.

[0058] Preferably, during the construction of the main structure, when the steel pipe column 3 is not filled with non-shrink concrete, the excess or deficiency of the single-sided tower column 101 is calculated based on 5% of its self-weight. Simultaneously, considering the unbalanced moment caused by environmental wind loads and other large construction machinery, the maximum unbalanced bending moment M1 and the maximum vertical load N1 are calculated to determine the vertical load of the temporary locking structure. The main load-bearing structure of the tower column 101 at the completed state is the steel pipe column 3 and the ball joint, resulting in the load R1 borne by the steel pipe column 3:

[0059]

[0060] in:

[0061] R1 is the vertical load borne by steel pipe column 3;

[0062] M1 is the maximum unbalanced bending moment of tower column 101 and main beam 102 during the construction to completion stage;

[0063] N1 represents the maximum vertical load on tower column 101 and main beam 102 during the construction phase until completion.

[0064] n represents the number of steel pipe columns (3);

[0065] L is the distance from the steel pipe column 3 to the center of the ball joint;

[0066] K Q The compressive stiffness of the ball joint;

[0067] K G The compressive stiffness of the steel pipe column is 3.

[0068] [R G [3] represents the allowable bearing capacity of the steel pipe column.

[0069] Preferably, during the cantilever construction stage of the main beam 102, calculations can be used to determine the increase in vertical load and unbalanced load as the main structure reaches a certain scale. The excess or deficiency of the main beam 102 on one side is calculated as 5% of its self-weight. Simultaneously, the unbalanced moment caused by environmental wind load and other large construction machinery is considered to obtain the maximum unbalanced bending moment M2 and the maximum vertical load N2, thus calculating the vertical load of the temporary locking structure. The main load-bearing structure of the tower column 101 at its completed state is the steel pipe column 3 and the ball hinge. The load R2 borne by the steel-concrete composite column 5 is obtained as follows:

[0070]

[0071] in:

[0072] R2 is the load borne by the concrete-filled steel tube column 5.

[0073] M2 is the maximum unbalanced bending moment during the cantilever construction of the main beam 102.

[0074] N2 is the maximum vertical load during the cantilever construction of the main beam 102.

[0075] K H The compressive stiffness of the steel-concrete composite column is 5.

[0076] [R H [5] represents the allowable bearing capacity of a steel-concrete composite column.

[0077] In some optional embodiments, releasing the temporary locking structure between the upper turntable 4 and the lower turntable 1 and rotating the main beam 102 includes: setting up jacks 8 between the upper turntable 4 and the lower turntable 1, with one end of the jacks 8 installed on the lower turntable 1. The jacks 8 can be arranged according to the position of the steel-concrete composite columns 5. They can be evenly distributed on both sides of each steel-concrete composite column 5, or they can be distributed on both sides of some steel-concrete composite columns 5. In some other embodiments, the jacks 8 can also be set at other positions between the upper turntable 4 and the lower turntable 1, as long as they can lift the upper turntable 4; using the jacks 8 to lift the upper turntable 4 and cut off each steel-concrete composite column 5, and then controlling all the jacks 8 to return oil synchronously, so that the upper turntable 4 slowly descends. When the upper turntable 4 descends to a stable state... The main beam 102 is rotated. That is, when the main beam 102 structure needs to be rotated, the temporary locking structure needs to be released before the rotation. The temporary locking mechanism is released by cutting each steel-concrete composite column 5. The cutting method can be set up by using a wire saw. After all the steel-concrete composite columns 5 are cut, the load-bearing capacity of the upper turntable 4 will be reduced. Therefore, before cutting the steel-concrete composite columns 5, jacks 8 are set up around the steel-concrete composite columns 5 so that the load-bearing position of the jacks 8 is close to the position of the steel-concrete composite columns 5 before they are cut, so as to minimize the impact caused by the cutting of the steel-concrete composite columns 5. When the jacks 8 are lifted to replace the steel-concrete composite columns 5 in bearing the force, after the steel-concrete composite columns 5 are cut with a wire saw, all the jacks 8 return to oil synchronously, and the rotating structure slowly descends.

[0078] See Figure 8 As shown, in some optional embodiments, a grid plate 31 is welded to one end of the steel pipe column 3. The upper ends of the multiple steel pipe columns 3, the upper ends of the multiple support legs 12, and the upper ball joint 22 are all cast together with the upper turntable 4 to form a temporary locking structure connecting the upper turntable 4 and the lower turntable 1. This includes casting the steel pipe column 3 with the grid plate 31 welded to it together with the upper turntable 4. That is, a grid plate 31 can be set at one end of the steel pipe column 3. When the upper end of the steel pipe column 3 is cast together with the upper turntable 4, there is pressure from the turntable on the steel pipe column 3. Since there is a grid plate 31 in the steel pipe column, the force from the upper turntable 4 can be evenly transmitted to the steel pipe column 3 through the grid plate 31, so that the force from the upper turntable 4 can have a better transmission effect.

[0079] In some optional embodiments, each steel pipe column 3 is connected to two ends of an embedded part 9. The embedded parts 9 at both ends of each steel pipe column 3 extend into the upper turntable 4 and the lower turntable 1, respectively. The side of the embedded part 9 away from the steel pipe column 3 is provided with a steel mesh 91. That is, the embedded part 9 can help fix the two ends of the steel pipe column 3 to the upper turntable 4 and the lower turntable 1, respectively. The steel mesh 91 can also make the steel pipe column 3 have a better load-bearing effect.

[0080] See Figures 8 to 10 As shown, in some optional embodiments, the upper turntable 4 is provided with multiple grouting holes 33 and multiple venting holes 32. Both the grouting holes 33 and venting holes 32 are connected to the cavities inside the steel pipe columns 3, and each steel pipe column 3 cavity is connected to at least one grouting hole 33 and at least one venting hole 32. The construction of the tower column 101 on the upper turntable 4, and the filling of concrete into the steel pipe columns 3 to form a steel-concrete composite column 5, includes: grouting concrete into the steel pipe columns 3 through the grouting holes 33... The concrete is filled into the steel pipe column 3 and vibrated to form a steel-concrete composite column 5. That is, during the process of pouring concrete into the steel pipe column 3, the gas in the steel pipe column 3 is discharged through the vent hole 32, making the process of pouring concrete into the steel pipe column 3 smoother. During the process of pouring concrete, a vibrator can also be inserted into the grouting hole 33, which can also be regarded as a vibration hole, so that the concrete in the steel pipe column 3 can be vibrated to improve the density of the concrete in the steel pipe column 3.

[0081] Preferably, before installing the lower turntable 1, and installing the slide rail 11 and the lower ball joint 21 in the lower turntable 1, and before arranging multiple hollow steel pipe columns 3 on the outer periphery of the lower ball joint 21, the method includes: installing strain gauges 34 on the outer wall of each steel pipe column 3. The strain gauges 34 are installed in the steel pipe column 3 to monitor the stress and strain of the steel pipe column 3 and the steel-concrete composite column 5 during construction, so as to compare the measured data with the calculated data at different stages of bridge construction, prevent some accidents from happening, and when there is a deviation between the measured data and the calculated data, the staff can make timely corrections.

[0082] Preferably, each steel pipe column 3 has a reinforcing steel bar 35 welded to one end along its inner wall. The reinforcing steel bar 35 extends along the axial direction of the steel pipe column 3. The upper ends of the multiple steel pipe columns 3, the upper ends of the multiple support legs 12, and the upper ball joint 22 are all cast together with the upper turntable 4 to form a temporary locking structure connecting the upper turntable 4 and the lower turntable 1. This includes: casting the reinforcing steel bar 35 in the steel pipe column 3 together with the upper turntable 4. The reinforcing steel bar 35 can be welded into the steel pipe column 3 during construction, or it can be welded into the steel pipe column 3 after the lower turntable 1 is installed and before the upper turntable 4 is installed. Welding the reinforcing steel bar 35 to the inner wall of the steel pipe column 3 and extending it into the upper turntable 4 can improve the torsional and shear bearing capacity of the temporary locking mechanism.

[0083] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0084] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0085] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge, characterized in that, It includes the following steps: Install the lower turntable (1), and install the slide (11) and lower ball joint (21) in the lower turntable (1). Arrange multiple steel pipe columns (3) with cavities on the outer periphery of the lower ball joint (21). The upper ball joint (22) is installed on the lower ball joint (21), and multiple support feet (12) are installed in the slide (11). The upper ends of multiple steel pipe columns (3), the upper ends of multiple support feet (12) and the upper ball joint (22) are all cast together with the upper turntable (4), so that multiple steel pipe columns (3) form a temporary locking structure connecting the upper turntable (4) and the lower turntable (1). During the construction of the tower column (101) and main beam (102) on the upper turntable (4), concrete is filled into the steel pipe column (3) so that the steel pipe column (3) and the concrete form a steel pipe concrete column (5). Release the temporary locking structure between the upper turntable (4) and the lower turntable (1), and rotate the main beam (102); During the construction of the tower column (101) and main beam (102) on the upper turntable (4), concrete is filled into the steel pipe column (3) to form a steel-concrete composite column (5) with the concrete, including: During the construction of the tower column (101) and main beam (102), when the tower column (101) and main beam (102) are built to the first preset scale, the steel pipe column (3) deforms, causing the upper ball joint (22) and the lower ball joint (21) to fit tightly together. The ball joint structure formed by the upper ball joint (22) and the lower ball joint (21) and the steel pipe column (3) reach a state of joint stress. As the tower column (101) and main beam (102) continue to be built, when the tower column (101) and main beam (102) are built to the second preset scale, concrete is filled into the steel pipe column (3) to form a steel pipe concrete column (5).

2. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 1, characterized in that, The upper turntable (4) includes an outer ring structure (41) and an inner ring structure (42). The upper ends of the multiple steel pipe columns (3), the upper ends of the multiple support legs (12), and the upper ball joint (22) are all cast together with the upper turntable (4) to form a temporary locking structure connecting the upper turntable (4) and the lower turntable (1), including: The upper ends of multiple support legs (12) are cast into one piece with the inner ring structure (42) of the upper turntable (4), and the upper ends of multiple steel pipe columns (3) are cast into one piece with the outer ring structure (41) of the upper turntable (4).

3. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 2, characterized in that, The process of casting the upper ends of multiple support legs (12) into the inner ring structure (42) of the upper turntable (4) and simultaneously casting the upper ends of multiple steel pipe columns (3) into the outer ring structure (41) of the upper turntable (4) includes: Connect two adjacent steel pipe columns (3) using a "Z" type connecting system (6); Each steel pipe column (3) is connected to the inner ring structure (42) via a steel structure (7).

4. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 1, characterized in that, The release of the temporary locking structure between the upper turntable (4) and the lower turntable (1), and the rotation of the main beam (102), includes: A jack (8) is set between the upper turntable (4) and the lower turntable (1), with one end of the jack (8) installed on the lower turntable (1). Use jacks (8) to lift the upper turntable (4) and cut each steel pipe concrete column (5). Then control all jacks (8) to return oil synchronously so that the upper turntable (4) slowly descends. When the upper turntable (4) descends to a stable state, rotate the main beam (102).

5. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 1, characterized in that, One end of the steel pipe column (3) is welded with a grid plate (31). The upper ends of the multiple steel pipe columns (3), the upper ends of the multiple support legs (12), and the upper ball joint (22) are all cast together with the upper turntable (4) to form a temporary locking structure connecting the upper turntable (4) and the lower turntable (1), including: The steel pipe column (3) with welded grid plate (31) is cast into one piece with the upper turntable (4).

6. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 5, characterized in that: Each steel pipe column (3) has embedded parts (9) connected to both ends. The embedded parts (9) at both ends of each steel pipe column (3) extend into the upper turntable (4) and the lower turntable (1) respectively. The side of the embedded parts (9) away from the steel pipe column (3) is provided with steel mesh (91).

7. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 1, characterized in that, The upper turntable (4) is provided with multiple grouting holes (33) and multiple venting holes (32). The grouting holes (33) and venting holes (32) are all connected to the cavity inside the steel pipe column (3). Each steel pipe column (3) cavity is connected to at least one grouting hole (33) and at least one venting hole (32). Concrete is filled into the steel pipe column (3) through the grouting holes (33) and the concrete inside the steel pipe column (3) is vibrated to form a steel pipe concrete column (5) with the steel pipe column (3).

8. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 1, characterized in that, Before installing the lower turntable (1), and installing the slide rail (11) and lower ball joint (21) in the lower turntable (1), and arranging multiple hollow steel pipe columns (3) on the outer periphery of the lower ball joint (21), the process includes: Strain gauges (34) are installed on the outer side wall of each steel pipe column (3).

9. The temporary locking method for the upper and lower turntables of a rotating cable-stayed bridge as described in claim 1, characterized in that, Each steel pipe column (3) has a reinforcing steel bar (35) welded to one end along its inner wall. The reinforcing steel bar (35) extends along the axial direction of the steel pipe column (3). The upper ends of the multiple steel pipe columns (3), the upper ends of the multiple support legs (12), and the upper ball joint (22) are all cast together with the upper turntable (4) to form a temporary locking structure connecting the upper turntable (4) and the lower turntable (1). This includes: The reinforcing steel bars (35) in the steel pipe column (3) are cast together with the upper turntable (4).

Images