Steel box girder sliding support
By designing a steel box beam slip bracket including limiting plates and sealing strips, the problems of road occupation and slip unstable during the sliding construction of steel box beams on the main traffic road are solved, and efficient and stable slip construction is achieved.
Patent Information
- Application Number
- CN202422156710.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-03
AI Technical Summary
When the steel box beam slip construction is carried out on the main traffic road, the existing slip brackets cannot avoid road occupation construction, and when the tracks with high curvature are laid, the fitting surface between the pulley and the track is unstable, resulting in the slip being out of synchronization and prone to blockage.
A steel box beam sliding bracket is designed, including multiple vertically mounted ground steel pipe pile columns, steel pipe connection systems, cow legs, cross beams, support beams and "working" tracks. Sliding boots are installed on the track, and the first limiting plate and the second limiting plate are provided on the bottom of the sliding boots. Combined with the sealing strip, it ensures that the sliding boots are tightly attached to the side wall of the track, prevent deflection, and remove dust and impurities on the track.
By optimizing the designed limit plate and sealant strips, the sliding boots slide stably on the track, avoiding the problems of slipping out of synchronization and blockage, and achieving safe and efficient steel box beam slip construction on the main traffic road.
Smart Images
Figure CN223033852U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge construction, in particular to a steel box girder sliding support. Background Technique
[0002] The steel box girder sliding construction method is a construction method widely used in the construction of suspension bridges, cross-water projects and long-span bridges. With its advantages of high efficiency, safety, time and labor saving, and environmental protection and energy saving, it has become an important technical means in modern bridge construction. It erects tracks along the length direction of the bridge and uses thrust equipment such as hydraulic push rods to push the steel box girder to slide in place along the bridge axis direction.
[0003] When our company conducts the construction of steel box girders, due to the limitations of the on-site conditions: the bridge to be built needs to span the main traffic artery, with a large traffic flow, and it is not possible or allowed to set up piers and occupy the road for construction. Moreover, the total width of the bridge to be built is 44m, and it is obliquely intersecting with the line at 33°. The conventional construction plan cannot avoid occupying the road for construction. Therefore, when using the sliding method for the construction of steel box girders, it is necessary to avoid occupying the road for construction and have a large construction span. It is necessary to reasonably plan the spacing and size of the sliding supports to safely carry the steel box girder stage. The existing sliding supports usually include tracks, sliding shoes, and supports. For example, a steel box girder lateral sliding installation structure disclosed in the publication number CN11962402A welds two rows of sliding devices transversely on the bottom of the steel box girder. The sliding device includes two vertically arranged support plates and a pulley. The upper ends of the two support plates are welded to the bottom of the steel box girder. The two support plates have a certain spacing and are provided with through shaft holes. The pulley is located between the two support plates, and the two ends of the wheel shaft of the pulley are respectively inserted into the shaft holes of the two support plates.
[0004] It can be seen from the above solution that since the pulley in contact with the top surface of the track is concave and the top surface of the track is convex upward, only through the cooperation of the concave and convex surfaces and the weight of the steel box girder, the pulley is pressed against the track, and there is no restriction on both sides. When laying a track with a certain curvature, the contact surface between the pulley and the track is unstable, which easily leads to a deviation in the synchronous sliding of two points of the same steel box girder. At the same time, due to the certain time difference between the track laying and the sliding construction during the construction process, and the frequent rainy weather in Guizhou, impurities are easily adhered to the slide rail, resulting in blockage during reciprocating sliding. Summary of the Utility Model
[0005] The utility model aims to provide a steel box girder sliding support to solve the problem that the existing sliding support cannot occupy the road for construction on the main traffic artery due to the limitations of on-site conditions.
[0006] To solve the above problems, the technical solution adopted by the utility model is as follows: a steel box girder sliding support, including a support and a sliding device. The support includes two rows of steel pipe pile columns vertically erected on the ground. A steel pipe connection system is connected between adjacent two steel pipe pile columns. A bracket is installed on the top surface of the steel pipe pile column. A cross beam is fixed on the brackets of the same row. A support beam perpendicular to and horizontal to the cross beam is lapped on the cross beam. An "I"-shaped track is provided along the length of the support beam. A sliding shoe is slidably connected to the track. Two rows of first limiting plates are provided on the bottom surface of the sliding shoe. The distance between the first limiting plates is the width of the upper part of the track. The length of the first limiting plate exceeds the widest point at the upper end of the track. Horizontal second limiting plates are respectively connected to the bottoms of the first limiting plates. A sealing strip is installed on the top surface of the second limiting plate. The opposite surfaces of the sealing strip are respectively attached to the side walls of the track. There are multiple supports. Multiple supports are arranged along the existing traffic road. And multiple supports are arranged in the open area beside the traffic road. Multiple supports are symmetrically and evenly arranged on both sides of the main tower foundation. The distance between adjacent two supports is 12m.
[0007] Further, the sliding shoe includes a steel plate, a section steel, and a jacking ear plate. The steel plate is a two-layer structure horizontal to the ground. The section steel is fixed between the two layers of steel plates. The section steel is a quadrangular prism with a vertical axis. The jacking ear plate is fixed on the front side of the section steel for connecting the crawler.
[0008] Further, several stiffening plates are respectively arranged at intervals on both sides of the section steel. The stiffening plates are connected between the two layers of section steel.
[0009] Further, two rows of first limiting plates are arranged along the length of the sliding shoe.
[0010] Further, there are two rows of steel pipe pile columns, and each row has 5 steel pipe pile columns.
[0011] Further, the steel pipe connection system includes three layers of horizontal steel pipes and two layers of inclined steel pipes. The horizontal steel pipes are connected between adjacent steel pipe pile columns. The inclined steel pipes are diagonally connected to the intersection points of the horizontal steel pipes and the steel pipe pile columns.
[0012] Further, the depth of the steel pipe pile column erected below the ground is twice the height erected on the ground.
[0013] The beneficial effects of this solution are as follows: The sliding shoe is clamped onto the track from top to bottom by the first limiting plate. The track is in an "I" shape. The distance between the first limiting plates is the width of the track head, and the length of the first limiting plate exceeds the widest point of the track so as to cover the waist of the track. A second limiting plate is connected to the bottom surface of the first limiting plate, and the distance between the second limiting plates is less than the widest point of the track, so that the sliding shoe can be buckled onto the track, ensuring stable sliding. And a sealing rubber strip is installed between the second limiting plate and the track, so that the gap under the sliding shoe can be sealed by the sealing rubber strip, and the dust and impurities on the track surface can be scraped off when the sliding shoe moves. The top surface of the track is a convex surface upward. Only by the cooperation of the concave-convex surface and the weight of the steel box girder, the pulley is pressed onto the track, but there is a lack of restrictions on both sides. When laying a track with a certain curvature, the fitting surface between the pulley and the track is unstable, which easily leads to deviations in the synchronous sliding of two points on the same steel box girder. At the same time, due to the certain time difference between track laying and sliding construction during the construction process, and the frequent rainy weather in Guizhou, impurities are easily adhered to the sliding rail, resulting in blockage during reciprocating sliding. This solution optimizes the length and width of the first limiting plate, adds a second limiting plate and a sealing rubber strip at the bottom of the first limiting plate, so that the sliding shoe can tightly hold the side wall of the track, prevent left and right deflection, and scrape off the dust and impurities on the track by the sealing rubber strip when the sliding shoe slides, avoiding blockage during reciprocating sliding. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 Schematic diagram of a sliding support in the prior art;
[0015] Figure 2 Front view schematic diagram of an embodiment of the present invention;
[0016] Figure 3 Side view schematic diagram of an embodiment of the present invention;
[0017] Figure 4 For Figure 2 Schematic diagram of part A in
[0018] Figure 5 For Figure 3 Schematic diagram of part B in
[0019] Figure 6 For Figure 5 Schematic diagram of part C in
[0020] Figure 7 Front view schematic diagram of the sliding shoe in an embodiment of the present invention;
[0021] Figure 8 Side view schematic diagram of the sliding shoe in an embodiment of the present invention;
[0022] Figure 9This is a top view schematic diagram of the sliding shoe in the embodiment of the present utility model;
[0023] Figure 10 This is an overall side view of the embodiment of the present utility model. Specific embodiments
[0024] The following is a further detailed description through specific embodiments:
[0025] The reference numerals in the accompanying drawings of the specification include: steel box girder 1, support 2, steel pipe pile column 21, steel pipe connection system 22, thick corbel 23, cross beam 24, support beam 25, track 3, track head 31, track waist 32, track lower part 33, sliding shoe 4, steel plate 41, section steel 42, stiffening plate 43, jacking ear plate 44, first limiting plate 45, second limiting plate 46, sealing strip 461, main tower base 5.
[0026] The embodiment is basically as shown in Figure 1 to Figure 10 shown:
[0027] The installation of the steel box girder 1 adopts a segment jacking and sliding scheme. Erection supports 2 and platforms are built at both ends of the bridge, and steel box girder 1 sliding supports 2 for jacking are set at the remaining parts. The steel box girder 1 sliding support 2 includes a support 2 and a sliding device. The support 2 is installed on the ground and is located at the bottom of the steel box girder 1 to be slid. There are multiple supports, and the multiple supports are arranged along the existing traffic highway, and the multiple supports are laid in the open area beside the traffic highway. The multiple supports are symmetrically and evenly distributed on both sides of the main tower base, and the distance between adjacent two supports is 12m.
[0028] As Figure 1 、 2 shown, the support 2 includes a steel pipe pile column 21, a steel pipe connection system 22, a cross beam 24, a corbel, and a support beam 25. In this embodiment, the steel pipe pile columns 21 are arranged in two rows. The steel pipe connection system 22 includes horizontal steel pipes horizontally connected between adjacent two steel pipe pile columns 21 and diagonal steel pipes connected diagonally. In this embodiment, there are three layers of horizontal steel pipes connected between the two rows of steel pipe pile columns 21, and there are two layers of diagonal steel pipes connected between the horizontal steel pipes. The same cross beam 24 is connected to the top of each row of steel pipe pile columns 21. The bottom surface of the cross beam 24 and the top surface of the steel pipe pile column 21 are connected through a corbel. Support beams 25 perpendicular to the cross beam 24 are respectively connected to the two cross beams 24, and a sliding device is installed on the top surface of the support beam 25.
[0029] The cross beam 24 is of the HW400*400 specification, the support beam 25 is a double HN588*300 track beam, the bracket is a 10-mm-thick bracket, the steel pipe connection system 22 is of the P273*8 steel pipe connection system specification, and the steel pipe pile column is of the P609*10 steel pipe pile column specification. There are five steel pipe pile columns in total. The distance between the first and the second column from left to right is 4.0 m, and the distance between the second and the fourth column is 9.5 m. The five columns are symmetrically arranged along the middle third column.
[0030] The sliding device includes a track 3 and a sliding shoe 4 slidably connected to the track 3. The track 3 is arranged along the top surface of the support beam 25, and the direction of the track 3 is consistent with the extending direction of the bridge. As Figure 5 , 6 shown, the overall vertical cross-section of the track 3 is in the shape of "I". The track 3 successively includes three parts from top to bottom: a track head 31, a track waist 32, and a track bottom 33. Among them, the top surface of the track head 31 is a convex arc surface, and the lower part of the track head 31 is in concave-convex fit with the lower part of the sliding shoe 4, so as to ensure that the sliding shoe 4 can be adapted to the slide rail.
[0031] As Figures 7 - 9 shown, the sliding shoe 4 includes a steel plate 41, a section steel 42, a stiffening plate 43, a jacking ear plate 44, and a first limiting plate 45. The steel plate 41 has two horizontal and square layers. The section steel 42 in the shape of a well is welded between the two layers of the steel plate 41. A number of stiffening plates 43 are respectively and spacedly welded on both side walls of the section steel 42. Two rows of first limiting plates 45 are welded on the bottom surface of the bottom steel plate 41. The distance between the first limiting plates 45 is the width of the track head 31. The first limiting plates 45 are arranged in two columns along the length of the sliding shoe 4, so as to evenly limit the sliding shoe 4 on the track 3. As Figure 6 shown, the length of the first limiting plate 45 exceeds the height of the track head 31. A horizontal second limiting plate 46 is respectively fixed on the bottom surface of the first limiting plate 45. The interval between the opposite surfaces of the second limiting plate 46 is available for the track waist 32 to pass through. A sealing strip 461 is installed on the top surface of the second limiting plate 46 and on one side opposite to the bottom wall of the track head 31. A sealing strip 461 is also installed at the angle between the first limiting plate 45 and the steel plate 41. The sealing strip 461 can be attached to the outer wall of the track 3, so that during the process of the sliding shoe 4 sliding along the track 3, the impurities on the track 3 can be scraped off. In this embodiment, the second limiting plate 46 is detachably connected to the first limiting plate 45, and the sealing strip 461 is fixed to the second limiting plate 46 by bolts. After the entire sliding shoe 4 is clamped into the track 3, the second limiting plate 46 is fixed to the first limiting plate 45.
[0032] A jacking ear plate 44 is welded on the front side wall of the track 3 and the sliding shoe 4. The jacking ear plate 44 is used to connect a crawler, and the crawler is a prior art.
[0033] The specific implementation process is as follows:
[0034] Erect the support 2 along the laying direction of the bridge. Use a 150-ton crawler crane to erect the steel pipe pile columns 21 in the foundation. The laying depth of the steel pipe piles below the ground is 18 m, and the height above the ground is 9 m. Install the steel pipe connecting system 22 between the steel pipe pile columns 21. After installing the corbels on the top surfaces of the steel pipe pile columns 21, horizontally erect the cross beam 24. Vertically erect the horizontal support beam 25 on the cross beam 24. Install the track 3 along the support beam 25. Slide the sliding shoe 4 on the track 3 through the first limit plate 45. After installing the sealing strip 461 on the second limit plate 46, fix the second limit plate 46 to the bottom of the first limit plate 45. After connecting the crawler to the jacking ear plate 44, through the external sliding jacking control system, jack each section of the multi-section integral steel box girder 1 to the corresponding position, and accurately adjust its position and elevation to the design requirements.
[0035] The above are only the embodiments of the present utility model. Common knowledge such as the specific structures and characteristics in the solutions is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners recorded in the description can be used to explain the content of the claims.
Claims
1. A steel box girder sliding support, comprising a support and a sliding device, characterized in that: The support includes two rows of steel pipe pile columns vertically erected on the ground, a steel pipe connection system is connected between two adjacent steel pipe pile columns, a corbel is installed on the top surface of the steel pipe pile column, a crossbeam is fixed on the same row of corbels, a support beam perpendicular to the crossbeam and horizontal is overlapped on the crossbeam, an "I"-shaped track is arranged along the length of the support beam, and a sliding shoe is slidably connected to the track; Two rows of first limit plates are arranged on the bottom surface of the sliding shoe, the spacing between the first limit plates is the width of the upper part of the track, the length of the first limit plates exceeds the widest point of the upper end of the track, the bottoms of the first limit plates are respectively connected to horizontal second limit plates, the top surfaces of the second limit plates are installed with sealing strips, and the opposite surfaces of the sealing strips are respectively attached to the side walls of the track; There are multiple supports, and multiple supports are arranged along the existing traffic road. Multiple supports are arranged in an open area beside the traffic road. Multiple supports are symmetrically and evenly arranged on both sides of the main tower base, and the distance between two adjacent supports is 12m.
2. The steel box girder sliding bracket according to claim 1, characterized in that: The sliding shoe includes a steel plate, a steel section, and a push ear plate. The steel plate is a two-layer structure horizontal to the ground. The steel section is fixed between the two layers of steel plates. The steel section is in the shape of an axially vertical quadrangular prism. The push ear plate is fixed on the front side of the steel section for connecting the crawler.
3. The steel box girder sliding bracket according to claim 2, characterized in that: A plurality of stiffening plates are arranged at intervals on both sides of the steel section, and the stiffening plates are connected between two layers of steel section.
4. The steel box girder sliding bracket according to claim 3, characterized in that: The first limiting plates are arranged in two rows along the length of the sliding shoe.
5. The steel box girder sliding bracket according to claim 4, characterized in that: The steel pipe pile columns are arranged in two rows, and each row has 5 steel pipe pile columns.
6. The steel box girder sliding bracket according to claim 5, characterized in that: The steel pipe connection system comprises three layers of horizontal steel pipes and two layers of inclined steel pipes. The horizontal steel pipes are connected between adjacent steel pipe pile columns, and the inclined steel pipes are diagonally connected at the intersection of the horizontal steel pipes and the steel pipe pile columns.
7. The steel box girder sliding bracket according to claim 6, characterized in that: The depth of the steel pipe pile column erected below the ground is twice the height of the steel pipe pile column erected on the ground.