Multifunctional support structure for steel truss

Abstract

The application discloses a kind of steel truss beam multifunctional support structure, it is related to steel bridge design field, the structure includes lower chord and support pad plate;The lower chord includes lower chord bottom plate, the lower chord bottom plate extends to the both sides of the lower chord;The support pad plate is arranged in the bottom of the lower chord bottom plate, and the support pad plate is connected with the extension area of the both sides of the lower chord bottom plate by bolt;Wherein, each corner of the top of the lower chord bottom plate is equipped with top lifting assembly, and the top lifting assembly is connected with the lower chord.This application is by extending lower chord bottom plate, bolt connection is carried out with pad on the extended lower chord bottom plate, so that staff can not enter lower chord and can be applied to bolt, avoid the weakening of additional manhole to chord mechanics performance;The application is also by setting top lifting assembly at each corner of the top of the lower chord bottom plate, make full use of the structure of lower chord, save space.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel bridge design, and particularly relates to a steel truss girder multifunctional supporting structure. BACKGROUND

[0002] The bridge support is an important structural component connecting the upper structure and the lower structure of the bridge, and is an important force transmission device of the bridge. The bridge support has a complex structure, and a large number of bolts and stiffening ribs are arranged in the bridge support. In the traditional design of the steel truss girder, the support pad plate and the bottom plate are bolted at four edges. In order to meet the maintenance of the support in the later period, a manhole is arranged at the bottom plate of the chord to facilitate the personnel to enter the inside of the chord to tighten the bolts and replace the components. Since the bottom plate in the support area has a large stress, the stress performance of the bottom plate is greatly weakened after the manhole is arranged at the bottom plate of the chord. Even if the plate is attached around the manhole for reinforcement, a large safety hazard is still left. In addition, since the manhole is not an airtight environment, the durability of the chord is also affected. In the existing design, in order to facilitate the replacement of the support in the later period, a temporary jacking device is arranged on the left and right sides of the chord by adding corresponding structures. This inevitably increases the complexity of the structural design and construction, and also increases the cost of the bridge support. SUMMARY

[0003] In view of the defects in the prior art, the present application provides a steel truss girder multifunctional supporting structure, which can solve the problems that the existing bridge support has a manhole arranged at the bottom plate of the chord, which affects the stress performance of the bottom plate, leaves a large safety hazard, and affects the durability of the chord. The present application can also solve the problems that the existing bridge support has corresponding structures added on the left and right sides of the chord to arrange a temporary jacking device, which increases the complexity of the structural design and construction, and increases the cost of the bridge support.

[0004] In a first aspect, the embodiments of the present application provide a steel truss girder multifunctional supporting structure, characterized in that the steel truss girder multifunctional supporting structure comprises a lower chord and a support pad plate. The lower chord comprises a lower chord bottom plate, and the lower chord bottom plate extends to both sides of the lower chord. The support pad plate is arranged at the bottom of the lower chord bottom plate, and the support pad plate and the extension area on both sides of the lower chord bottom plate are connected by bolts. The top of the lower chord bottom plate is provided with a jacking assembly at each corner, and the jacking assembly is connected to the lower chord.

[0005] In combination with the first aspect, in an implementation manner, the lower chord further comprises two opposite and parallel node plates and a lower chord top plate connecting the upper ends of the two node plates.

[0006] In combination with the first aspect, in an implementation manner, the inside of the lower chord is provided with a plurality of partitions. The partitions are vertically arranged, and the plurality of partitions are arranged in the area of the support pad plate in the same interval and in parallel.

[0007] In combination with the first aspect, in an implementation, the extension area on both sides of the lower chord bottom plate is provided with a plurality of support stiffening ribs, the support stiffening ribs correspond to the positions of the partition plates, and are connected through the node plates.

[0008] In combination with the first aspect, in an implementation, the support stiffening ribs are irregular rectangular plates.

[0009] In combination with the first aspect, in an implementation, the bolts are uniformly distributed in the area enclosed by the plurality of support stiffening plates and the support backing plates.

[0010] In combination with the first aspect, in an implementation, the top lifting assembly includes a top lifting backing plate and four top lifting stiffening ribs, the top lifting backing plate is arranged at the bottom of each corner of the lower chord bottom plate, and the top lifting stiffening ribs are arranged above the lower chord bottom plate and correspond to the positions of the top lifting backing plates.

[0011] In combination with the first aspect, in an implementation, the four top lifting stiffening ribs of the top lifting assembly are divided into two pairs, each pair of the top lifting stiffening ribs is symmetrically arranged about the node plate, the two pairs of the top lifting stiffening ribs are parallel to each other, the bottom edges of the top lifting stiffening ribs are welded to the top lifting backing plates, and the side edges of the top lifting stiffening ribs are welded to the node plates.

[0012] In combination with the first aspect, in an implementation, the top lifting stiffening ribs are irregular rectangular plates.

[0013] In combination with the first aspect, in an implementation, the lower chord bottom plate is a variable-width rectangular plate, the width of the lower chord bottom plate inside the area enclosed by the four top lifting backing plates is greater than the width of the lower chord bottom plate outside the area enclosed by the four top lifting backing plates, and the width change is an arc.

[0014] The technical scheme provided by the embodiments has at least the following beneficial effects:

[0015] 1. The application prolongs the lower chord bottom plate, and the extended lower chord bottom plate is bolted to the backing plate, so that the staff can tighten the bolts without entering the lower chord, avoiding weakening of the mechanical properties of the chord due to the addition of manholes, solving the problems in the prior art that manholes are opened in the lower chord bottom plate, affecting the stress performance of the bottom plate, leaving a large safety hazard, and affecting the durability of the chord.

[0016] 2. The application sets a top lifting assembly at each corner of the top of the lower chord bottom plate, fully utilizes the structure of the lower chord, saves space, solves the problems in the prior art that corresponding structures are added to the left and right sides of the lower chord to set temporary top lifting devices, increases the complexity of structural design and construction, and increases the cost of the bridge support. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0018] Figure 1 A plane structure schematic diagram of a steel truss girder multifunctional supporting structure provided by the embodiments of the present application;

[0019] Figure 2 A cross-section schematic diagram of a support pad of a steel truss girder multifunctional supporting structure provided by the embodiments of the present application;

[0020] Figure 3 A cross-section schematic diagram of a top lifting assembly of a steel truss girder multifunctional supporting structure provided by the embodiments of the present application;

[0021] Figure 4 A support pad and bolt structure diagram of a steel truss girder multifunctional supporting structure provided by the embodiments of the present application;

[0022] In the figure: 1, a lower chord; 101, a lower chord bottom plate; 102, a node plate; 103, a lower chord top plate; 2, a partition plate; 3, a support pad; 4, a support stiffening rib; 5, a top lifting pad; 6, a top lifting stiffening rib. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0024] The embodiments of the present application provide a steel truss girder multifunctional supporting structure, which can solve the problems that the existing bridge support will open a manhole in the chord bottom plate, which will affect the stress performance of the bottom plate, leave a larger safety hazard, and affect the durability of the chord; and can also solve the problems that the existing bridge support adds corresponding structures on the left and right sides of the chord to set a temporary top lifting device, which increases the complexity of structure design and construction, and increases the cost of the bridge support.

[0025] Referring to Figure 1As shown, the embodiment of the present application provides a steel truss girder multifunctional support structure, which comprises a lower chord 1 and a support pad 3. The lower chord 1 comprises a lower chord bottom plate 101, which extends to both sides of the lower chord 1. The support pad 3 is arranged at the bottom of the lower chord bottom plate 101, and the support pad 3 is connected to the extension area of both sides of the lower chord bottom plate 101 by bolts. Wherein, a top lifting assembly is arranged at each corner of the top of the lower chord bottom plate 101, and the top lifting assembly is connected to the lower chord 1.

[0026] The steel truss girder multifunctional support structure provided by the embodiment of the present application can prolong the lower chord bottom plate 101, and the support pad 3 is connected to the extended lower chord bottom plate 101 by bolts, so that the staff can tighten the bolts without entering the lower chord 1, thereby avoiding the weakening of the chord mechanical properties caused by the addition of manholes. Compared with the existing steel truss girder support structure, the existing steel truss girder support structure will open manholes on the lower chord bottom plate 101, which will affect the stress performance of the bottom plate, leave a large safety hazard, and affect the durability of the chord. At the same time, the steel truss girder multifunctional support structure provided by the embodiment of the present application sets a top lifting assembly at each corner of the top of the lower chord bottom plate 101, fully utilizes the structure of the lower chord 1, saves space, solves the problem that the existing technology will add corresponding structures on both sides of the lower chord 1 to set temporary top lifting devices, increases the complexity of structural design and construction, and increases the cost of the bridge support.

[0027] As an optional embodiment, referring to Figure 1 and Figure 2 As shown, the lower chord 1 further comprises two opposite and parallel node plates 102 and a lower chord top plate 103 connected to the upper ends of the two node plates 102. The middle parts of the lower chord bottom plate 101, the node plate 102 and the lower chord top plate 103 are all vertically provided with chord reinforcing ribs to strengthen the overall support strength of the lower chord 1. At the same time, the thickness and strength of the node plate 102 itself are high, which can be used as the basis for subsequent construction to construct the top lifting assembly and the support assembly.

[0028] As an optional embodiment, referring to Figure 1 and Figure 2 As shown, the inside of the lower chord 1 is provided with a plurality of partitions 2, which are vertically arranged and arranged in the same interval and parallel in the area of the support pad 3. The partitions 2 are used to strengthen the out-of-plane stability of the node plate 102 and increase the bearing area of the overall structure. The plurality of partitions 2 are arranged in the same interval and parallel, so that the partitions 2 can uniformly transmit the received pressure, ensure the uniform stress of the whole, and prolong the service life of the steel truss girder multifunctional support structure provided by the embodiment of the present application.

[0029] As an optional embodiment, referring to Figure 1 and Figure 2As shown in the drawings, the extension area on both sides of the bottom plate 101 of the lower chord is provided with a plurality of support stiffening ribs 4, which correspond to the position of the partition plate 2 and are connected through the node plate 102. The support stiffening ribs 4 are used to increase the local stiffness of the lower chord 1, and can further increase the overall pressure bearing area and strengthen the pressure bearing capacity of the steel truss multi-functional support structure provided in the embodiment.

[0030] As an optional embodiment, referring to Figure 1 and Figure 2 , the support stiffening rib 4 is a non-regular rectangular plate. The support stiffening rib 4 is a non-regular rectangular plate with a cut corner, and the cut corner is located at the top of the support stiffening rib 4 and away from the end of the node plate 102. The cut corner of the support stiffening rib 4 can reduce the phenomenon of stress concentration.

[0031] As an optional embodiment, referring to Figure 1 , Figure 2 and Figure 4 , the bolts are uniformly distributed in the area enclosed by the support stiffening plates 4 and the support pad plates 3. Each side includes two rows of bolts, and each side of the support stiffening plate 4 and the support pad plate 3 encloses four areas. According to the order from one end to the other end, the number of bolts in each area is eight, ten, ten, and eight, respectively. Since the bolts are arranged on the outside of the node plate 102, the construction personnel do not need to enter the inside of the chord for construction, but only need to tighten the bolts on the outside of the chord, avoiding the weakening of the mechanical properties of the chord due to the addition of manholes.

[0032] As an optional embodiment, referring to Figure 1 and Figure 3 , the jacking assembly includes a jacking pad 5 and four jacking stiffening ribs 6. The jacking pad 5 is arranged at the bottom of each corner of the lower chord bottom plate 101, and the jacking stiffening rib 6 is arranged above the lower chord bottom plate 101 and corresponds to the position of the jacking pad 5. The jacking assembly is erected at the four corners of the lower chord bottom plate 101 to serve as a component for placing jacking equipment, wherein the size of the jacking pad 5 needs to meet the space requirements of the later maintenance and repair arrangement of the jack.

[0033] As an optional embodiment, referring to Figure 1 and Figure 3As shown in the figure, the four roof lifting stiffening ribs 6 of the roof lifting assembly are divided into two pairs, each pair of roof lifting stiffening ribs 6 is symmetrically arranged about the node plate 7, the two pairs of roof lifting stiffening ribs 6 are parallel to each other, the bottom edge of the roof lifting stiffening rib 6 is welded with the roof lifting pad 5, and the side edge of the roof lifting stiffening rib 6 is welded with the node plate 7. Since the node plate 7 itself has sufficient strength and thickness, the roof lifting assembly formed by the stiffening plate 6, the node plate 7 and the roof lifting pad 5 has a certain bearing strength. Compared with the existing roof lifting structure, the existing roof lifting structure usually adds a cross beam on the left and right sides of the lower chord 1 to place the temporary roof lifting device, which increases the complexity of structural design and construction and improves the cost. The steel truss multi-functional supporting structure provided in the embodiment of the application directly sets the roof lifting assembly on the segment plate 102 on the longitudinal two sides of the lower chord 1, which fully utilizes the original structure of the structure, saves space while ensuring the strength of the roof lifting assembly, and saves the construction period.

[0034] As an optional embodiment, refer to Figure 1 and Figure 3 As shown in the figure, the roof lifting stiffening rib 6 is a non-regular rectangular plate. The roof lifting stiffening rib 6 is a non-regular rectangular plate with a cut corner, and the cut corner is located at the top of the roof lifting stiffening rib 6 and away from one end of the node plate 102. The cut corner of the roof lifting stiffening rib 6 can reduce the phenomenon of stress concentration.

[0035] As an optional embodiment, refer to Figure 1 and Figure 3 As shown in the figure, the lower chord bottom plate 101 is a variable-width rectangular plate, and the width of the lower chord bottom plate 101 inside the region enclosed by the four roof lifting pads 5 is greater than the width of the lower chord bottom plate 101 outside the region enclosed by the four roof lifting pads 5, and the width change is an arc. Since the steel truss multi-functional supporting structure provided in the embodiment of the application needs to arrange multiple pads on the bottom of the lower chord bottom plate 101, the width of the lower chord bottom plate 101 is relatively large. In order to save steel as much as possible, the structure of the lower chord bottom plate 101 is determined as a variable-width rectangular plate, and the steel at the four corners outside the pad area is saved. In order to avoid the phenomenon of stress concentration, the width change position of the lower chord bottom plate 101 is changed in an arc transition manner.

[0036] The steel truss multi-functional supporting structure provided in the embodiment of the application has the following specific implementation manners:

[0037] Before the combination construction of the steel truss girder multifunctional supporting structure provided in the embodiment of the present application is performed, the steel truss girder multifunctional supporting structure is pre-designed, the lower chord bottom plate 101 with a variable-width rectangular plate shape and a plurality of support stiffening ribs 4 with irregular rectangular plate shapes and a plurality of top lifting stiffening ribs 6 with irregular rectangular plate shapes are cut out on the steel structure according to the designed structure, and then the combination is assembled. The overall structure of the lower chord 1 is assembled first, the support pad plate 3 is placed at the center of the bottom of the lower chord 1, and then three cross partitions 2 are welded in the interior of the lower chord 1 at equal intervals in the area of the support pad plate 3, and the cross partitions 2 are perpendicular to the lower chord bottom plate 101. Then the support stiffening ribs 4 are welded on the outer side of the lower chord 1, the positions of the support stiffening ribs 4 correspond to the positions of the cross partitions 2, and the support stiffening ribs 4 are arranged on the outer side of the node plate 102. After the support stiffening ribs 4 are welded, bolts are uniformly applied in the area enclosed by the plurality of support stiffening plates 4 and the support pad plate 3, wherein there are two rows of bolts on each side of the lower chord 1, and four areas are enclosed by each support stiffening plate 4 and the support pad plate 3, and the number of bolts in each area is eight, ten, ten, and eight in order from one end to the other end. Finally, the top lifting assembly is installed on the lower chord 1, the top lifting pad 5 is placed at the bottom of each corner of the lower chord bottom plate 101, and the top lifting stiffening rib 6 is arranged above the lower chord bottom plate 101 and corresponds to the position of the top lifting pad 5. The four top lifting stiffening ribs 6 of the top lifting assembly are divided into two pairs, each pair of top lifting stiffening ribs 6 is symmetrically arranged about the node plate 7, the two pairs of top lifting stiffening ribs 6 are parallel to each other, the bottom edge of the top lifting stiffening rib 6 is welded to the top lifting pad 5, and the side edge of the top lifting stiffening rib 6 is welded to the node plate 7. After the overall welding is completed, the combination assembly of the steel truss girder multifunctional supporting structure provided in the embodiment of the present application is completed.

[0038] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or a communication within two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0040] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A multi-functional support structure for steel truss beams, characterized in that, include: The lower chord (1) includes a lower chord base plate (101) which extends to both sides of the lower chord (1). Support plate (3), the support plate (3) is placed on the bottom of the lower chord base plate (101), and the support plate (3) is connected to the extended areas on both sides of the lower chord base plate (101) by bolts; The lifting assembly includes a lifting pad (5) and four lifting stiffening ribs (6). The lifting pad (5) is placed at the bottom of each corner of the bottom plate (101) of the lower chord. The lifting stiffening ribs (6) are located above the bottom plate (101) of the lower chord and correspond to the position of the lifting pad (5).

2. The multi-functional support structure for steel truss beams as described in claim 1, characterized in that: The lower chord (1) also includes two opposite and parallel node plates (102) and a lower chord top plate (103) connecting the upper ends of the two node plates (102).

3. The multi-functional support structure for steel truss beams as described in claim 2, characterized in that: The lower chord (1) is provided with multiple partitions (2) inside. The partitions (2) are vertically arranged and are arranged in parallel at the same intervals in the area of ​​the support pad (3).

4. The multi-functional support structure for steel truss beams as described in claim 3, characterized in that: Multiple support stiffening ribs (4) are provided on the extended areas on both sides of the bottom plate (101) of the lower chord. The support stiffening ribs (4) correspond to the positions of the partition plate (2) and are connected through the node plate (102).

5. The multi-functional support structure for steel truss beams as described in claim 4, characterized in that: The stiffening rib (4) of the support is an irregular rectangular plate.

6. The multi-functional support structure for steel truss beams as described in claim 5, characterized in that: The bolts are evenly distributed in the area enclosed by the multiple support stiffening ribs (4) and the support pad (3).

7. A multi-functional support structure for steel truss beams as described in claim 2, characterized in that: The four lifting stiffening ribs (6) of the lifting assembly are divided into two pairs. Each pair of lifting stiffening ribs (6) is symmetrically arranged about the node plate (7). The two pairs of lifting stiffening ribs (6) are parallel to each other. The bottom edge of the lifting stiffening rib (6) is welded to the lifting pad plate (5), and the side edge of the lifting stiffening rib (6) is welded to the node plate (7).

8. The multi-functional support structure for steel truss beams as described in claim 7, characterized in that: The lifting stiffening rib (6) is an irregular rectangular plate.

9. A multi-functional support structure for steel truss beams as described in claim 6, characterized in that: The lower chord base plate (101) is a rectangular plate with variable width. The width of the lower chord base plate (101) inside the area enclosed by the four top pads (5) is greater than the width of the lower chord base plate (101) outside the area enclosed by the four top pads (5), and the width change is an arc.

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