An auxiliary support structure
By designing an auxiliary support structure, and utilizing a combination of liftable supports and support columns, the bearing area is increased and a reverse support force is provided, thus solving the problem of beam overturning during bridge construction and ensuring construction safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA RAILWAY 11TH BUREAU GRP CORP LTD
- Filing Date
- 2023-08-21
- Publication Date
- 2026-05-26
AI Technical Summary
The lack of effective auxiliary support structures in existing technologies to strengthen temporary consolidation makes it difficult to control the risk of beam overturning during bridge construction.
Design an auxiliary support structure, including a liftable support and a support column. Utilize a combination of an upper bearing plate, a vertical support plate, a lower bearing plate, a slide rail, jacks, and a base. The jacks provide pre-jacking force to prevent the beam from overturning and provide reverse support force under unbalanced loads.
It increases the bearing area, prevents local crushing of the concrete at the bottom of the beam, ensures the stability of the support structure, prevents the beam from overturning, shares the temporary consolidation pressure, and provides reverse support force to prevent the beam from overturning.
Smart Images
Figure CN117071438B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bridge construction technology, and more specifically, to an auxiliary support structure. Background Technology
[0002] In the cantilever construction of continuous beams in bridge engineering, in order to ensure that the beam does not overturn during the construction process, temporary supports need to be set on the top of the main pier to solidify the beam and the pier.
[0003] However, when temporary consolidation design fails to fully consider working conditions or unexpected situations, and reinforcement of the existing temporary consolidation is required, there is currently no relevant auxiliary support structure for reinforcing the temporary consolidation. Summary of the Invention
[0004] The purpose of this application is to provide an auxiliary support structure to strengthen temporary consolidation, addressing the shortcomings of the prior art.
[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:
[0006] In a first aspect, one embodiment of this application provides an auxiliary support structure, including: a liftable support and a support column; wherein, the liftable support includes: an upper bearing plate, a vertical support plate, a lower bearing plate, a slide rail, a jack, and a base; the top surface of the upper bearing plate is the support surface of the liftable support, and the angle between the upper bearing plate and the horizontal direction is: the angle between the side support surface of the bottom of the bridge body to be supported and the horizontal direction, for fitting with the side support surface of the bottom of the bridge body to be supported;
[0007] The bottom surface of the upper bearing plate is fixedly connected to the top surface of the vertical support plate, and the bottom surface of the vertical support plate is fixedly connected to the top surface of the lower bearing plate.
[0008] The bottom of the jack is fixedly mounted on the top surface of the base, the bottom surface of the base is fixedly connected to the top surface of the support column, and the bottom surface of the slide is fixedly connected to the top surface of the base, so that the jack is located within the space enclosed by the slide on the top surface of the base; the support part of the jack is in contact with the bottom surface of the lower bearing plate.
[0009] In one possible implementation, the liftable support further includes: a stiffening plate, the top surface of which is fixedly connected to the bottom surface of the upper bearing plate, and the side surface of the vertical support plate is fixedly connected to the side surface of the stiffening plate, and the bottom surface of the stiffening plate is fixedly connected to the top surface of the lower bearing plate.
[0010] In one possible implementation, the liftable support further includes: a limiting plate and a vertical steel plate;
[0011] The top surface of the vertical steel plate is fixedly connected to the bottom surface of the lower bearing plate. The limiting plate is provided with a slot and a first through hole. The bottom surface of the vertical steel plate passes through the slot, and the side surface of the limiting plate is fixed to the inner wall of the slide groove. The support part of the jack passes through the first through hole and contacts the bottom surface of the lower bearing plate.
[0012] In one possible implementation, the liftable support further includes a pad; the pad has a second through hole, and the bottom surface of the pad contacts the limiting plate, so that the support part of the jack passes through the first through hole and the second through hole in sequence and contacts the bottom surface of the lower pressure plate.
[0013] In one possible implementation, the supporting column is a pure steel pipe structure or a steel-concrete composite structure.
[0014] In one possible implementation, if the supporting column is a pure steel pipe structure, the specifications of the pure steel pipe structure are as follows: based on the supporting force of the jack, the parameters of a variety of preset steel pipe structures, and using preset strength verification formulas and stability verification formulas, a target specification is selected from the variety of specifications.
[0015] In one possible implementation, if the supporting column is a steel-concrete composite structure, the construction parameters of the steel-concrete composite structure are determined based on the supporting force of the jack, the cross-sectional area of the preset steel pipe, the preset yield strength of the steel, and the preset technical specifications of the steel-concrete composite structure.
[0016] In one possible implementation, the supporting force of the jack is calculated using the force analysis model of the auxiliary support structure, based on the center distance between the temporary fixed points corresponding to the bridge body to be supported, the center distance between the auxiliary support structure and the temporary fixed points, the vertical force of the bridge body to be supported, the unbalanced load parameters corresponding to the included angle, the vertical stiffness of the temporary fixed points, and the vertical stiffness of the liftable support.
[0017] Secondly, another embodiment of this application provides a bridge support structure, including: the bottom of the bridge support column is fixed to the bottom surface, the top surface of the bridge support column is fixedly connected to the bottom surface of the temporary consolidation, the top surface of the temporary consolidation is in contact with the central support surface of the bottom of the bridge body to be supported, and the top surface of the upper bearing plate in the auxiliary support structure is in contact with the side support surface of the bottom of the bridge body to be supported.
[0018] In one possible implementation, the number of temporary consolidations is two sets, and the top surfaces of the two sets of temporary consolidations are in contact with the bottom surfaces at symmetrical positions on both sides of the central support surface.
[0019] The auxiliary support structure consists of two sets, in which the top surface of the upper bearing plate of the two sets of auxiliary support structures is respectively attached to the side support surfaces at symmetrical positions on both sides of the central axis at the bottom of the bridge body to be supported.
[0020] The beneficial effects of this application are:
[0021] This application provides an auxiliary support structure, including: a liftable support and a support column; wherein, the liftable support includes: an upper bearing plate, a vertical support plate, a lower bearing plate, a slide rail, a jack, and a base. The top surface of the upper bearing plate is the support surface of the liftable support, and the angle between the upper bearing plate and the horizontal direction is the same as the angle between the side support surface of the bottom of the bridge body to be supported and the horizontal direction, for fitting against the side support surface of the bottom of the bridge body to be supported; the bottom surface of the upper bearing plate is fixedly connected to the top surface of the vertical support plate, and the bottom surface of the vertical support plate is fixedly connected to the top surface of the lower bearing plate; the bottom of the jack is fixedly mounted on the top surface of the base, the bottom surface of the base is fixedly connected to the top surface of the support column, and the bottom surface of the slide rail is fixedly connected to the top surface of the base, so that the jack is located within the space enclosed by the slide rail on the top surface of the base; the support part of the jack is in contact with the bottom surface of the lower bearing plate. In this application, by attaching the upper bearing plate to the beam to be supported, the bearing area can be increased, preventing the concrete at the bottom of the beam from being locally crushed. The vertical support plate is moved along the slide rail by the gaps on the left and right sides of the inner wall of the slide rail at the transverse end of the vertical support plate, preventing the bearing plate from overturning. By placing the jack within the space enclosed by the top surface of the base and the slide rail, the main load-bearing structure can move up and down along the slide rail with the support part of the jack, thus providing a certain pre-jacking force and allowing the support to bear the load in advance, thus sharing the pressure on the temporary consolidation. Furthermore, when the beam slightly tilts to one side under uneven loads during cantilever construction, the auxiliary support structure on the tilting side can provide reverse support force to prevent the beam from overturning. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the first auxiliary support structure provided in the embodiments of this application;
[0024] Figure 2 This is a schematic diagram of a second type of auxiliary support structure provided in an embodiment of this application;
[0025] Figure 3 This is a schematic diagram of the third auxiliary support structure provided in the embodiments of this application;
[0026] Figure 4 This is a schematic diagram of the fourth auxiliary support structure provided in the embodiments of this application;
[0027] Figure 5 A stress analysis model diagram of an auxiliary support structure provided in this application embodiment;
[0028] Figure 6 This is a schematic diagram of a bridge support structure provided in an embodiment of this application.
[0029] Icons: 100-Liftable support; 200-Support column; 300-Bridge support column; 400-Temporary consolidation; 500-Bridge body to be supported; 600-Auxiliary support structure; 101-Upper bearing plate; 102-Vertical support plate; 103-Lower bearing plate; 104-Slide rail; 105-Jack; 106-Base; 107-Helping plate; 108-Limiting plate; 109-Vertical steel plate; 110-Padded plate; 111-Slot; 112-First through hole; 113-Second through hole. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0031] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] In the description of this application, it should be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0034] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] To clearly describe the methods provided in the various embodiments of this application, the auxiliary support structure provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings and through multiple embodiments. Figure 1 This is a schematic diagram of the first auxiliary support structure provided in the embodiments of this application, as shown below. Figure 1 As shown, the auxiliary support structure includes: a liftable support 100 and a support column 200.
[0037] The liftable support 100 includes: an upper pressure plate 101, a vertical support plate 102, a lower pressure plate 103, a slide rail 104, a jack 105, and a base 106; the top surface of the upper pressure plate 101 is the support surface of the liftable support 100, and the angle between the upper pressure plate 101 and the horizontal direction is the angle between the side support surface of the bottom of the bridge body 500 to be supported and the horizontal direction, so as to fit with the side support surface of the bottom of the bridge body 500 to be supported.
[0038] The upper pressure plate 101, vertical support plate 102, lower pressure plate 103, slide rail 104, jack 105, and base 106 are all cut from steel plates and fixed by welding. It should be understood that while welding can be used to connect the parts in this embodiment, other methods such as screw fixing can also be used in actual use, as long as the parts are securely connected.
[0039] The bottom surface of the upper bearing plate 101 is fixedly connected to the top surface of the vertical support plate 102, and the bottom surface of the vertical support plate 102 is fixedly connected to the top surface of the lower bearing plate 103.
[0040] For example, the bottom surface of the upper bearing plate 101 is fixed to the vertical support plate 102 by welding, and the upper bearing plate 101 has a certain angle with the horizontal direction. The angle of this angle is the angle between the side support surface of the bottom of the bridge body 500 to be supported and the horizontal direction. The top surface of the upper bearing plate 101 is in close contact with the bridge body 500 to be supported. The bottom surface of the vertical support plate 102 is perpendicular to the top surface of the lower bearing plate 103 and is fixed by welding. There is a gap of about 5 mm between the lateral end of the vertical support plate 102 and the inner wall of the slide 104. It should be understood that the above embodiment is only an illustrative example. The gap between the lateral end of the vertical support plate 102 and the inner wall of the slide 104 can also be 4 mm, 6 mm or even other numbers. It can be flexibly adjusted according to the user's needs and is not limited to the above embodiment.
[0041] The bottom of the jack 105 is set on the top surface of the base 106. The bottom surface of the base 106 is fixedly connected to the top surface of the support column 200. The bottom surface of the slide rail 104 is fixedly connected to the top surface of the base 106, so that the jack 105 is located within the space surrounded by the slide rail 104 on the top surface of the base 106. The support part of the jack 105 is in contact with the bottom surface of the lower pressure plate 103.
[0042] For example, the bottom of the jack 105 is vertically and fixedly connected to the top surface of the base 106 by welding. The bottom surface of the base 106 is vertically and fixedly welded to the top surface of the support column 200. The slide rail 104 is cut from a circular steel pipe, and the bottom surface of the slide rail 104 is vertically and fixedly welded to the top surface of the base 106. The slide rail 104 has holes on its side to facilitate the placement of the jack 105. The holes on the side of the slide rail 104 are designed according to the actual size of the jack. This embodiment does not limit the shape and size of the holes on the side of the slide rail 104, as long as the jack 105 is placed within the space enclosed by the top surface of the base 106 and the slide rail 104. The support part of the jack 105 is vertically and fixedly welded to the bottom surface of the lower pressure plate 103. The center points of the upper pressure plate 101, multiple vertical support plates 102, lower pressure plate 103, slide rail 104, jack, and base 106 are all on the same vertical line.
[0043] This application provides an auxiliary support structure, including: a liftable support and a support column; wherein, the liftable support includes: an upper bearing plate, a vertical support plate, a lower bearing plate, a slide rail, a jack, and a base. The top surface of the upper bearing plate is the support surface of the liftable support, and the angle between the upper bearing plate and the horizontal direction is the same as the angle between the side support surface of the bottom of the bridge body to be supported and the horizontal direction, for fitting against the side support surface of the bottom of the bridge body to be supported; the bottom surface of the upper bearing plate is fixedly connected to the top surface of the vertical support plate, and the bottom surface of the vertical support plate is fixedly connected to the top surface of the lower bearing plate; the bottom of the jack is fixedly mounted on the top surface of the base, the bottom surface of the base is fixedly connected to the top surface of the support column, and the bottom surface of the slide rail is fixedly connected to the top surface of the base, so that the jack is located within the space enclosed by the slide rail on the top surface of the base; the support part of the jack is in contact with the bottom surface of the lower bearing plate. In this application, by attaching the upper bearing plate to the beam to be supported, the bearing area can be increased, preventing the concrete at the bottom of the beam from being locally crushed. The vertical support plate is moved along the slide rail by the gaps on the left and right sides of the inner wall of the slide rail at the transverse end of the vertical support plate, preventing the bearing plate from overturning. By placing the jack within the space enclosed by the top surface of the base and the slide rail, the main load-bearing structure can move up and down along the slide rail with the support part of the jack, thus providing a certain pre-jacking force and allowing the support to bear the load in advance, thus sharing the pressure on the temporary consolidation. Furthermore, when the beam slightly tilts to one side under uneven loads during cantilever construction, the auxiliary support structure on the tilting side can provide reverse support force to prevent the beam from overturning.
[0044] Based on the embodiments of this application, a structural diagram of a second auxiliary support structure is also provided. Figure 2 This is a schematic diagram of a second type of auxiliary support structure provided in an embodiment of this application, as shown below. Figure 2 As shown, the liftable support also includes: a stiffening plate 107, the top surface of the stiffening plate 107 is fixedly connected to the bottom surface of the upper bearing plate 101, and the side surface of the vertical support plate 102 is fixedly connected to the side surface of the stiffening plate 107, and the bottom surface of the stiffening plate 107 is fixedly connected to the top surface of the lower bearing plate 103.
[0045] Among them, the stiffening plate 107 is cut from steel plate.
[0046] For example, the top surface of the stiffening plate 107 is fixed to the bottom surface of the upper bearing plate 101 by welding, and the side surface of the vertical support plate 102 is fixed to the side surface of the stiffening plate 107 by welding, which is perpendicular to each other. The bottom surface of the stiffening plate 107 is fixed to the top surface of the lower bearing plate 103 by welding, which is perpendicular to each other. The vertical support plate 102, the stiffening plate 107, and the lower bearing plate 103 are all perpendicular to each other.
[0047] In this embodiment of the application, stiffening plates are welded into multiple vertical support plates, which increases the stability of the temporary support and ensures that the auxiliary support structure is subjected to balanced forces when supporting the bridge body to be supported, preventing the bridge body to be supported from being crushed locally due to uneven forces, or the auxiliary support structure from being damaged.
[0048] Based on the embodiments of this application, a structural diagram of a third auxiliary support structure is also provided. Figure 3 This is a schematic diagram of the third auxiliary support structure 600 provided in the embodiments of this application, as shown below. Figure 3 As shown, the liftable support also includes: a limiting plate 108 and a vertical steel plate 109;
[0049] The top surface of the vertical steel plate 109 is fixedly connected to the bottom surface of the lower pressure plate 103. The limiting plate 108 is provided with a slot 111 and a first through hole 112. The bottom surface of the vertical steel plate 109 passes through the slot 111. The side of the limiting plate 108 is fixed to the inner wall of the slide 104. The support plate of the jack 105 passes through the first through hole 112 and contacts the bottom surface of the lower pressure plate 103.
[0050] For example, the top surface of the vertical steel plate 109 and the bottom surface of the lower bearing plate 103 are perpendicular to each other and fixed by welding. The two vertical steel plates 109 are symmetrically arranged with the center line of the lower bearing plate 103 as an axis of symmetry. The limiting plate 108 is cut into a circular structure from a steel plate and fixed to the inner wall of the slide 104 by welding. The side of the limiting plate 108 is perpendicular to the slide 104. The limiting plate 108 is provided with two slots 111 and a first through hole 112. The two slots 111 are set according to the positions of the two vertical steel plates 109. The center distance between the two slots 111 is the same as the center distance between the two vertical steel plates 109. The width of the slots 111 is 5 mm wider than the vertical steel plates 109, so that the bottom surface of the vertical steel plates 109 can pass through the slots 111. It should be understood that the above embodiments are merely illustrative examples. The number of vertical steel plates 109 and slots 111 can also be three, four, or even other numbers, which can be flexibly adjusted according to user needs and are not limited to those given in the above embodiments. It is sufficient to ensure that the number of vertical steel plates 109 and slots 111 is equal and that each vertical steel plate 109 can pass through one slot 111. The difference between the width of the slot 111 and the width of the vertical steel plate 109 can also be 4 mm, 6 mm, or even other numbers, which can be flexibly adjusted according to user needs and are not limited to those given in the above embodiments. It is necessary to ensure that the width of the slot 111 is greater than the width of the vertical steel plate 109, and that the vertical steel plate 109 does not wobble after being inserted into the slot 111. The center of the first through hole 112 is the same as the center of the limiting plate 108, and the through hole area of the first through hole 112 is greater than the area of the jack 105, so that the support plate of the jack 105 passes through the first through hole 112 and contacts the bottom surface of the lower pressure plate 103.
[0051] In this embodiment, a limiting plate is set to restrict the lowest position of the liftable support, ensuring the fit between the auxiliary support structure and the bridge body to be supported. A slot is set on the limiting plate, and a vertical steel plate is welded to the bottom surface of the lower bearing plate. The vertical steel plate is inserted into the slot, restricting the part above the lower bearing plate of the liftable support to the inner wall of the slide. This ensures that the supporting force of the jack in the liftable support is always kept in the vertical direction, preventing the auxiliary support structure from becoming unstable after being subjected to force, causing local crushing of the bridge body to be supported, or damage to the auxiliary support due to uneven stress on the structure.
[0052] Based on the embodiments of this application, a structural diagram of a fourth auxiliary support structure is also provided. Figure 4 This is a schematic diagram of the fourth auxiliary support structure provided in the embodiments of this application, as shown below. Figure 4 As shown, the liftable support also includes: a pad 110.
[0053] The pad 110 is provided with a second through hole 113, and the bottom surface of the pad 110 contacts the limiting plate 108, so that the support part of the jack 105 passes through the first through hole 112 and the second through hole 113 in sequence and contacts the bottom surface of the lower pressure plate 103.
[0054] Example, Figure 4 This is a partial structural diagram of the liftable support in the fourth auxiliary support structure provided in this application embodiment, as shown below. Figure 4 As shown, the pad 110 is a circular structure cut from a steel plate and is fixed to the bottom of the lower pressure plate 103 by welding. The pad 110 is provided with a second through hole 113. The bottom surface of the pad 110 contacts the limiting plate 108. The diameter of the second through hole 113 is smaller than the diameter of the first through hole 112. The through hole area of the second through hole 113 is larger than the area of the jack 105, so that the support part of the jack 105 passes through the first through hole 112 and the second through hole 113 in sequence and contacts the bottom surface of the lower pressure plate 103.
[0055] In this embodiment, a circular pad is welded to the bottom of the lower bearing plate so that the jack does not directly contact the lower bearing plate, thus playing a buffering role. This allows the lifting force of the jack to be evenly distributed to the lower bearing plate, ensuring that the lower bearing plate is evenly stressed.
[0056] Based on the embodiments of this application, a material selection for the support column in the auxiliary support structure is also provided, wherein the support column is a pure steel pipe structure or a steel pipe concrete structure.
[0057] Based on the embodiments of this application, a method for selecting the specifications of the support column is also provided. For example, if the support column is a pure steel pipe structure or a steel pipe concrete structure, when the support column is a pure steel pipe structure, the specifications of the pure steel pipe structure are: based on the supporting force of the jack, the preset parameters of various steel pipe structures, and using preset strength verification formulas and stability verification formulas, the target specification is selected from various specifications.
[0058] The supporting force of the jack is a known force. The preset parameters for various specifications of steel pipe structures include: calculated length of steel pipe. steel pipe diameter Yield strength of steel Steel pipe wall thickness The target specification is selected from multiple specifications through calculation.
[0059] For example, when the supporting column is a pure steel pipe structure, the supporting force of the jacks is considered. Yield strength of steel and the preset strength verification formula Determine the cross-sectional area when the supporting column is a pure steel pipe structure. .
[0060] For example, based on the above calculations, the cross-sectional area when the supporting column is a pure steel tube structure is obtained. Corresponding steel pipe diameter Pipe wall thickness And the formula for the moment of inertia of the steel pipe in the preset stability verification formula. Determine the moment of inertia I of the current specification of pure steel pipe.
[0061] For example, based on the above calculations, the moment of inertia I of the pure steel pipe and the cross-sectional area of the current pure steel pipe... And the formula for the radius of gyration of the steel pipe in the preset stability verification formula. Determine the radius of gyration of the pure steel pipe of the current specification. .
[0062] For example, the radius of gyration of the pure steel pipe calculated above. Calculated length of steel pipe And the formula for the slenderness ratio of steel pipes The slenderness ratio of the steel pipe was calculated. .
[0063] For example, when the supporting force of the jack is known... Cross-sectional area of pure steel pipe structure Slenderness ratio of steel pipe The corresponding influence coefficient φ of the steel pipe cross section and the yield strength of the steel. At that time, the stability formula of the steel pipe length in the preset stability verification formula is used. When the above pure steel pipe parameters meet the steel pipe length stability formula in the preset stability verification formula, the specification corresponding to the pure steel pipe parameters is the target specification.
[0064] In this embodiment, based on the supporting force of the jack and the preset parameters of various steel pipe structures, the preset strength verification formula and stability verification formula are used to select the target specification of the auxiliary support structure support column when it is a pure steel pipe structure from various specifications, so that the entire auxiliary support structure provides the supporting force required by the bridge body when supporting the bridge to be supported.
[0065] Based on the embodiments of this application, a method for determining the structural parameters of a support column is also provided. For example, if the support column is a pure steel pipe structure or a steel pipe concrete structure, when the support column is a steel pipe concrete structure, the structural parameters of the steel pipe concrete structure are determined according to the supporting force of the jack, the cross-sectional area of the preset steel pipe, the preset yield strength of the steel, and the preset structural specifications of the steel pipe concrete.
[0066] The supporting force of the jack is a known force. The preset yield strength of the steel is The cross-sectional area of the pre-designed steel pipe includes: the cross-sectional area of the pre-designed steel pipe is... And the cross-sectional area of the core concrete inside the steel pipe is The pre-designed specifications for concrete-filled steel tube structures include: the design value of the compressive strength of the concrete inside the steel tube. Bearing capacity reduction factor considering the effect of eccentricity Bearing capacity reduction factor considering the effect of slenderness ratio Coefficients related to concrete, etc. The construction parameters are determined through calculation.
[0067] For example, when the supporting column is a steel-concrete composite structure, the cross-sectional area of the steel pipe is predetermined. The cross-sectional area of the core concrete inside the pre-designed steel pipe And the pre-set calculation formula for the steel content of concrete-filled steel tubes. Determine the steel content of concrete-filled steel tubes. .
[0068] For example, the steel content of the steel-concrete composite tube calculated above. Yield strength of steel Design value of compressive strength of concrete inside steel pipe And the pre-set formula for calculating the confinement coefficient of steel-concrete composite pipes. Determine the confinement coefficient of concrete-filled steel tubular structures. .
[0069] For example, based on the confinement coefficient of concrete-filled steel tubular structures. Coefficients related to concrete, etc. Related formulas The size relationship determines the supporting reaction force on the supporting column. The value of , when At that time, according to the preset Calculation formula, cross-sectional area of core concrete inside steel pipe Design value of compressive strength of concrete inside steel pipe Concrete-filled steel pipe conduit coupling coefficient Determine the support reaction force on the support column ;when At that time, according to the preset calculation formula Cross-sectional area of the core concrete inside the steel pipe Design value of compressive strength of concrete inside steel pipe Concrete-filled steel pipe conduit coupling coefficient Determine the support reaction force on the support column. .
[0070] For example, when the supporting force of the jack is known... Cross-sectional area of the core concrete inside the steel pipe Design value of compressive strength of concrete inside steel pipe Support reaction force on the support column At that time, through a preset formula When the support reaction force on the support column satisfies the above formula, the corresponding parameter of the support reaction force on the support column is the steel-concrete composite structure parameter in this application.
[0071] In this embodiment, the structural parameters of the steel-concrete composite support column are determined based on the supporting force of the jack, the cross-sectional area of the preset steel pipe, the preset yield strength of the steel, and the preset structural specifications of the steel-concrete composite. This ensures that the supporting force provided by the steel-concrete composite support column, which is cast according to the structural parameters, meets the supporting force required by the bridge body to be supported.
[0072] Based on the embodiments of this application, a method for determining the support force of a jack is also provided. The support force of the jack is calculated by using the force analysis model of the auxiliary support structure based on the center distance between the temporary fixed joints corresponding to the bridge body to be supported, the center distance between the auxiliary support structure and the temporary fixed joints, the vertical force of the bridge body to be supported, the unbalanced load parameters corresponding to the included angle, the vertical stiffness of the temporary fixed joints, and the vertical stiffness of the liftable support.
[0073] Among them, the auxiliary support structure can only provide vertical support force and cannot provide tensile force. Assuming that the stiffness of the beam is infinite, the bridge body to be supported, the temporary fixed joint and the auxiliary support structure are simplified into a theoretical calculation model of three-point elastic support under unbalanced load. The temporary fixed joint and the liftable support are simplified into spring supports. Assuming that the bridge body to be supported undergoes a small rotation around one side of the temporary fixed joint under unbalanced load, the support force of the auxiliary support structure is calculated through the force analysis model diagram.
[0074] Figure 5 A stress analysis model diagram of an auxiliary support structure provided in this application embodiment is shown below. Figure 5 As shown, point A represents the coordinates of the temporary fixed point on the offset side of the bridge, point B represents the coordinates of the temporary fixed point of the offset support of the bridge body to be supported, and point C represents the coordinates of the auxiliary support structure. The center distance between the temporary fixed points corresponding to the bridge body to be supported is... The center distance between the auxiliary support structure and the temporary consolidation is The vertical force on the bridge body to be supported is Vertical stiffness of temporary consolidation Vertical stiffness of adjustable supports And the unbalanced load parameters corresponding to the included angle, which include: the vertical force generated by the unbalanced load. Unbalanced bending moment caused by unbalanced load , The bridge body to be supported undergoes a slight rotation around a temporary fixed point on one side under unbalanced load. It should be understood that the force analysis model of the auxiliary support structure provided in this application embodiment is only one case of the bridge body to be supported shifting. In actual use, the direction of the bridge body to be supported shifting is not limited; it can shift to the left or to the right. The following method can be used to calculate any shift.
[0075] For example, the bridge body to be supported undergoes a slight rotation around a temporary fixed point on one side when subjected to unbalanced loads. At that time, the support force provided by the temporary consolidation of the offset support point of the bridge body to be supported. The tensile force provided by the temporary consolidation on the offset side of the bridge body to be supported Auxiliary support structure provides The supporting force and the vertical force of the bridge body to be supported are Vertical forces generated by unbalanced loads It can be seen that equilibrium has been achieved:
[0076] (1)
[0077] For example, the center distance between the temporary fixed connections corresponding to the bridge body to be supported is... The center distance between the auxiliary support structure and the temporary consolidation is Unbalanced bending moment caused by unbalanced load And from the moment balance of the entire structure, we can see that:
[0078] (2)
[0079] For example, when the spring temporarily fixed on the offset side of the bridge body to be supported has an elongation of... The spring elongation of the auxiliary support structure is According to deformation coordination:
[0080] (3)
[0081] Solving equation (3) yields:
[0082] (4)
[0083] Substituting (4) into equation (2):
[0084]
[0085] (5)
[0086] (6)
[0087] (7)
[0088] Based on the aforementioned known center distance between the temporary fixed connections corresponding to the supporting bridge body, The center distance between the auxiliary support structure and the temporary consolidation is The vertical force on the bridge body to be supported is Vertical stiffness of temporary consolidation Vertical stiffness of adjustable supports And the unbalanced load parameters corresponding to the included angle, which include: the vertical force generated by the unbalanced load. Unbalanced bending moment caused by unbalanced load This allows us to obtain the support force provided by the temporary consolidation of the offset support point of the bridge body to be supported. The tensile force provided by the temporary consolidation on the offset side of the bridge body to be supported Auxiliary support structure provides Support.
[0089] In this embodiment, the supporting force is calculated using a force analysis model of the auxiliary support structure based on the center distance between the temporary fixed points corresponding to the bridge body to be supported, the center distance between the auxiliary support structure and the temporary fixed points, the vertical force of the bridge body to be supported, the unbalanced load parameters corresponding to the included angle, the vertical stiffness of the temporary fixed points, and the vertical stiffness of the liftable support. The supporting force calculated by this force analysis model is the minimum force that the jacks in the auxiliary support structure need to provide. The force provided by the jacks is adjusted according to the supporting force calculated by this force analysis model so that the auxiliary support structure can meet the requirements of supporting the bridge body to be supported while protecting the temporary fixed points.
[0090] Based on the embodiments of this application, a bridge support structure is also provided, including: a bridge support column 300, a temporary consolidation 400, and any of the above-mentioned auxiliary support structures 600; Figure 6 This is a schematic diagram of a bridge support structure provided in an embodiment of this application, as shown below. Figure 6 As shown, the bottom surface of the bridge support column 300 is fixed to the ground, the top surface of the bridge support column 300 is fixedly connected to the bottom surface of the temporary consolidation 400, the top surface of the temporary consolidation 400 is in contact with the bottom central support surface of the bridge body 500 to be supported, and the top surface of the upper bearing plate in the auxiliary support structure 600 is in contact with the bottom side support surface of the bridge body 500 to be supported.
[0091] Based on the embodiments of this application, a method for determining the number of temporary consolidation and auxiliary support structures is also provided. The number of temporary consolidation is two sets, and the top surfaces of the two sets of temporary consolidation are attached to the bottom surfaces at symmetrical positions on both sides of the central axis of the central support surface.
[0092] There are two sets of auxiliary support structures. The top surface of the upper bearing plate in the two sets of auxiliary support structures is respectively attached to the side support surfaces at symmetrical positions on both sides of the bottom center axis of the bridge body to be supported.
[0093] In this embodiment, the number of temporary consolidation and auxiliary support structures corresponds one-to-one. The auxiliary support structures are set on both sides of the temporary consolidation, away from the central axis of the central support surface of the bridge body to be supported. By setting two sets of temporary consolidation and two sets of auxiliary support structures corresponding to the temporary consolidation, the temporary consolidation and auxiliary support structures can support the bridge body to be supported at the same time. The auxiliary support structures can share some of the pressure on the temporary consolidation. When the beam tilts slightly to either side under uneven load during construction, the auxiliary support structures can provide reverse support force to prevent the beam from tilting.
[0094] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An auxiliary support structure, characterized in that, include: A liftable support and a supporting column; wherein the liftable support includes: an upper bearing plate, a vertical support plate, a lower bearing plate, a slide rail, a jack, and a base; the top surface of the upper bearing plate is the support surface of the liftable support, and the angle between the upper bearing plate and the horizontal direction is: the angle between the side support surface of the bottom of the bridge body to be supported and the horizontal direction, for fitting with the side support surface of the bottom of the bridge body to be supported; The bottom surface of the upper bearing plate is fixedly connected to the top surface of the vertical support plate, and the bottom surface of the vertical support plate is fixedly connected to the top surface of the lower bearing plate. The bottom of the jack is fixedly mounted on the top surface of the base, the bottom surface of the base is fixedly connected to the top surface of the support column, and the bottom surface of the slide is fixedly connected to the top surface of the base, so that the jack is located within the space enclosed by the slide on the top surface of the base; the support part of the jack is in contact with the bottom surface of the lower pressure plate. The liftable support also includes: a limiting plate, a vertical steel plate, and a pad; The top surface of the vertical steel plate is fixedly connected to the bottom surface of the lower bearing plate. The limiting plate is provided with a slot and a first through hole. The bottom surface of the vertical steel plate passes through the slot, and the side of the limiting plate is fixed to the inner wall of the slide. The support part of the jack passes through the first through hole and contacts the bottom surface of the lower bearing plate. The pad is provided with a second through hole, and the bottom surface of the pad contacts the limiting plate, so that the support part of the jack passes through the first through hole and the second through hole in sequence and contacts the bottom surface of the lower bearing plate.
2. The auxiliary support structure according to claim 1, characterized in that, The liftable support further includes: a stiffening plate, the top surface of which is fixedly connected to the bottom surface of the upper bearing plate, and the side surface of the vertical support plate is fixedly connected to the side surface of the stiffening plate, and the bottom surface of the stiffening plate is fixedly connected to the top surface of the lower bearing plate.
3. The auxiliary support structure according to claim 1, characterized in that, The supporting columns are either pure steel pipe structures or steel pipe concrete structures.
4. The auxiliary support structure according to claim 3, characterized in that, If the supporting column is a pure steel pipe structure, the specifications of the pure steel pipe structure are as follows: based on the supporting force of the jack, the parameters of a variety of preset steel pipe structures, and using preset strength verification formulas and stability verification formulas, the target specification is selected from the variety of specifications.
5. The auxiliary support structure according to claim 3, characterized in that, If the supporting column is a steel-concrete composite structure, the construction parameters of the steel-concrete composite structure are determined based on the supporting force of the jack, the cross-sectional area of the preset steel pipe, the preset yield strength of the steel, and the preset technical specifications of the steel-concrete composite structure.
6. The auxiliary support structure according to claim 1, characterized in that, The supporting force of the jack is calculated using the force analysis model of the auxiliary support structure, based on the center distance between the temporary fixed points corresponding to the bridge body to be supported, the center distance between the auxiliary support structure and the temporary fixed points, the vertical force of the bridge body to be supported, the unbalanced load parameters corresponding to the included angle, the vertical stiffness of the temporary fixed points, and the vertical stiffness of the liftable support.
7. A bridge support structure, characterized in that, include: Bridge support columns, temporary consolidation, and auxiliary support structures as described in any one of claims 1-6 above; The bottom of the bridge support column is fixed to the ground, the top surface of the bridge support column is fixedly connected to the bottom surface of the temporary consolidation, the top surface of the temporary consolidation is in contact with the central support surface of the bottom of the bridge body to be supported, and the top surface of the upper bearing plate in the auxiliary support structure is in contact with the side support surface of the bottom of the bridge body to be supported.
8. The bridge support structure according to claim 7, characterized in that, The number of temporary consolidations is two sets, and the top surface of the two sets of temporary consolidations is in contact with the bottom surface at symmetrical positions on both sides of the central axis of the central support surface. The auxiliary support structure consists of two sets, in which the top surface of the upper bearing plate of the two sets of auxiliary support structures is respectively attached to the side support surfaces at symmetrical positions on both sides of the central axis at the bottom of the bridge body to be supported.