CN204212058U - For the steel truss girder assembling support in the construction of steel concrete composite truss beam - Google Patents

Abstract

The utility model discloses a kind of for the steel truss girder assembling support in the construction of steel concrete composite truss beam, belong to technical field of bridge construction.It comprises multiple assembling support unit corresponding to the longitudinal Node configuration of steel truss girder, each described assembling support unit comprises upper bracket and the corresponding lower carriage being arranged on described upper bracket bottom, described lower carriage is positioned at beam body bottom, lower carriage comprises four and vertically arranges and the steel post of rectangular arrangement, the lower end of every root steel post is connected with the concrete foundation being arranged on its underpart, described upper bracket comprises two along the side stand of steel truss girder horizontally set and the top rail being connected to two side stand upper ends, the upper end of four steel posts of lower carriage is fixedly connected with a solid lintel steel column respectively, described lintel steel column is fixedly connected with through the lower end of upper bracket described in Liang Tiyu.The utility model structural strength is high, and regular shape is simply stressed, can provide the strong strong point for girder steel is assembled.

Description

Steel truss beam assembly support used in steel concrete composite truss beam construction

technical field

The utility model relates to a steel truss girder assembly bracket used in the construction of a steel-concrete composite truss girder, which belongs to the technical field of bridge construction. The utility model also relates to a steel concrete composite truss beam construction support system using the steel truss beam assembly support.

Background technique

The Shaoguan Zhenjiang Bridge on the Deconstruction Line has a total length of 2.3km, 1-88m composite truss girders spanning 13# to 14#, across the uplink and downlink lines of the Beijing-Guangzhou Railway, and the angle of intersection is 30°. It is located on a curve with a radius of R= 800m on the transition curve. It adopts the construction method of lateral cast-in-place, dragging and moving in place.

In the prior art, for the assembly construction of the steel structure part of the under-supported composite beam, most of them use concrete pouring supports for construction, but for steel structural beams with large loads, the stress of the concrete pouring supports is excessively concentrated at the joints of the steel beams, and its It cannot bear the concentrated stress of the steel beam joints, and the elastic deformation of the support is large, which is not conducive to the accurate positioning of the steel beam joints.

Contents of the invention

Aiming at the above-mentioned defects in the prior art, the utility model provides a steel truss beam assembly support which can provide a strong supporting point for steel truss beam assembly in the construction of a steel-concrete composite truss beam.

The utility model is realized through the following technical scheme: a steel truss girder assembly support used in the construction of steel-concrete composite truss girders, which includes a plurality of assembly support units corresponding to the longitudinal nodes of the steel truss girders, each The assembled bracket unit includes an upper bracket and a lower bracket correspondingly arranged at the lower part of the upper bracket, the lower bracket is located at the lower part of the beam body, and the lower bracket includes four vertically arranged steel columns arranged in a rectangular shape, each The lower end of the steel column is connected to the concrete foundation arranged at its lower part, and the four steel columns of the lower bracket are provided with an upper flat connection, a lower flat connection and at least one connecting system, and the upper bracket includes two steel truss beams Horizontally arranged side brackets and upper beams connected to the upper ends of the two side brackets. The side brackets include triangular brackets I and triangular brackets II. Triangular brackets I are vertically arranged, and their upper ends are connected to the upper beams. The triangular brackets II is obliquely arranged on the outside of the triangular bracket I, its lower end is fixed with the lower end of the triangular bracket I, its upper end is connected with the upper beam and is located outside the triangular bracket I, and an upper bracket is arranged between the two side brackets of the upper bracket. The bottom parallel connection of the support and the parallel connection of the upper support are provided with oblique connections at least on the triangular support I, and the upper ends of the four steel columns of the lower support are respectively fixedly connected with a solid lintel steel column, and the lintel steel column passes through the beam body It is fixedly connected with the lower end of the upper bracket.

In the utility model, each assembly unit is independent, and two or two units form a force-bearing system independently. When the steel truss beam is assembled, the steel truss beam assembly bracket supports the entire weight of the steel truss beam, and the load is directly transmitted to the concrete foundation. .

In order to improve the bearing capacity of the assembled bracket, the upper beam is formed by assembling and welding two I-beams side by side. Two I-beams are assembled side by side to form a beam with a rectangular cavity in the middle, which can improve the bearing capacity of the upper beam, and the top of the upper beam of this structure can be equipped with a vertical jack during construction, which is beneficial to the linear adjustment of the beam.

In order to ensure the bearing capacity of the assembled bracket, the diameter of the lintel steel column is 120mm.

The utility model also provides a steel-concrete composite truss beam construction support system, which adopts the technical scheme of: including a full hall support for concrete pouring, and also includes a steel truss as described in any one of claims 1 to 3 Beam assembly support, corresponding to the assembly support unit of the steel truss assembly support set between each steel truss beam longitudinal node, the concrete pouring support and steel truss assembly support share a foundation, the lower support of the assembly support unit is located In the lower part of the beam body, the upper bracket of the assembled bracket unit is located at the upper part of the beam body, and the lower bracket and the upper bracket of the assembled bracket unit are connected by a lintel steel column passing through the beam body.

The steel truss girder assembly bracket in the utility model has high structural strength, regular shape, and simple stress. During the construction process of the steel-concrete composite beam, it can provide a strong support point for the steel beam assembly, and the elastic deformation of the bracket is relatively small compared to the beam body. The full support for concrete pouring is much smaller, which is conducive to the accurate positioning of steel truss girder nodes. In the specific construction, the steel truss girder assembly support and the beam body concrete pouring are constructed at the same time and are independent of each other. The steel truss girder assembly support alone bears the pressure of the steel truss girder and directly transfers the load to the concrete foundation, avoiding the need for beam body concrete The excessive concentration of stress at the node position of the steel truss beam by pouring the support reduces the local pressure burden of the full hall support and ensures the safety of the construction; in addition, the top of the upper beam of the steel truss beam assembly support in the utility model can be installed during construction The vertical jack is conducive to the linear adjustment of the beam body. The utility model can cleverly use the step distance of the cross bar of the full hall support to design the transverse connection between the assembled steel truss beams, and increase the strength of the support while making full use of the limited space to avoid conflicts between the supports.

Description of drawings

The structural representation in Fig. 1 specific embodiment of the utility model;

Fig. 2 is the E-E schematic diagram in Fig. 1;

Fig. 3 is the F-F schematic diagram in Fig. 1;

Fig. 4 is an enlarged schematic diagram of part A in Fig. 1;

Fig. 5 is a structural schematic diagram of the assembly unit of the steel truss beam assembly support in a specific embodiment of the present invention;

Fig. 6 is a side view of Fig. 5;

Fig. 7 is a G-G schematic diagram in Fig. 6;

Fig. 8 is the H-H schematic diagram in Fig. 6;

Fig. 9 is a schematic side view of the upper bracket of the assembled unit of the steel truss beam assembled bracket in the present invention;

Fig. 10 is a schematic view of D-D in Fig. 9;

Fig. 11 is the B-B schematic diagram in Fig. 10;

In the figure, 1. Assembled support unit, 2. Steel truss beam, 3. Upper support, 4. Lower support, 5. Liner steel column, 6. Upper beam, 7. Triangular support I, 8. Triangular support II, 9. Upper Bracket flat connection, 10. Upper bracket bottom flat connection, 11. Steel column, 12. Connection system, 13. Concrete foundation, 14. Lower bracket connection, 15. Upper bracket connection, 16. Diagonal connection, 17 , Ribbed plate, 18, connecting steel plate, 19, basic steel plate.

Detailed ways

Below in conjunction with accompanying drawing and non-limiting embodiment, the utility model is further described:

As shown in the attached picture, the Shaoguan Zhenjiang Bridge on the decommissioning line has a total length of 2.3km, 1-88m steel-concrete composite truss girders span 13# to 14#, and cross the Beijing-Guangzhou Railway up and down lines, with an intersection angle of 30 °, located on the transitional curve with a curve radius of R=800m. This project adopts the construction method of lateral cast-in-place and dragging and moving laterally.

The construction of steel-concrete composite truss girders is carried out by erecting full-wall brackets and steel truss girder assembly brackets on the right side of the bridge. The full hall bracket is used for pouring concrete, and the steel truss beam assembly bracket is used for assembling the steel truss beam 2. The assembled support of the steel truss girder includes eight assembled support units 1 , which are respectively arranged corresponding to the longitudinal nodes of the steel truss girder 2 . Each assembled bracket unit 1 includes an upper bracket 3 and a lower bracket 4 correspondingly arranged at the lower part of the upper bracket 3 . The lower bracket 4 is located at the bottom of the beam body. The lower bracket 4 includes four vertically arranged steel columns 11 arranged in a rectangular shape. The lower end of each steel column 11 is connected with the concrete foundation 13 arranged at its lower part. An upper parallel link 15, a lower parallel link 14 and at least one connecting system 12 are arranged between the steel columns 11. In this embodiment, in order to ensure the overall strength of the steel truss beam assembly bracket, the steel column 11 of the lower bracket adopts a steel pipe of φ219×12mm, the upper flat connection 15 and the lower flat connection 14 adopt No. 16 channel steel, and the connecting system 12 adopts No. 16 groove steel. The connection system 12 can be provided with one or more paths according to the overall design capability of the assembled bracket. The lower ends of the four steel columns 11 of the lower bracket 4 are provided with connecting steel plates 18 of 500×500×20 mm, and the foundation steel plates 19 of 550×550×20 mm and pre-embedded connectors are arranged in the concrete foundation 13, and the steel columns 11 of the lower bracket 4 pass through The buried connectors are fixedly connected to the concrete foundation and pre-buried in the concrete foundation. In order to ensure the connection strength, several 100×200×10mm ribbed plates 17 are arranged between the steel column 11 and the connecting steel plate 18 . The upper ends of the four steel columns 11 of the lower bracket 4 are each connected with a vertically arranged solid lintel steel column 5, and the diameter of the lintel steel column 5 is 120mm. The upper bracket 3 is located on the upper part of the beam body, and the upper bracket 3 includes two side brackets arranged transversely along the steel truss girder and an upper beam 6 connected to the upper ends of the two side brackets. Each side bracket includes a triangular bracket I7 and a triangular bracket II8. The triangular support I7 is vertically arranged, and the upper apex of the triangle is fixedly connected with the upper beam 6. The triangular support II8 is obliquely arranged on the outside of the triangular support I7, and its lower end is fixed with the lower end of the triangular support I7. The upper apex is fixedly connected with the upper beam 6 and is located outside the triangular bracket I7. Both the triangular support I7 and the triangular support II8 are welded from φ219×9mm steel pipes. The upper bracket bottom flat connection 10 and the upper bracket flat connection 9 are arranged between the two side brackets of the upper bracket 3, and at least a diagonal connection 16 is provided on the triangular bracket I7, and the bottom flat connection 10 of the upper bracket adopts a φ159×6mm steel pipe , The upper bracket flat joint 9 adopts φ108×6mm steel pipe, and the oblique joint 16 adopts φ108×6mm steel pipe. The upper beam 6 is formed by assembling and welding two 30a I-beams side by side. The four lintel steel columns 5 arranged at the upper end of the lower bracket 4 pass through the beam body and are fixedly connected with the lower ends of the two side brackets of the upper bracket 3 located at the top of the beam body. The position where the lintel steel column passes through the beam body can utilize the position of the drain hole of the beam body.

In the specific construction, the steel truss beam assembly support and the beam body concrete pouring full hall support are constructed at the same time, and the steel truss beam assembly support and the full hall support share a foundation. The specific construction method of the steel truss beam assembly support is: including the following steps: (1) measurement and positioning: calculate the four steel columns 11 of the lower support 4 in each assembly support unit according to the position of each assembly segment of the steel truss beam and determine the position of the upper parallel connection of the lower bracket 4 according to the elevation setting of the beam bottom; (2) Foundation treatment: Since the steel truss beam assembly bracket and the full hall bracket share the same foundation, the foundation of the steel truss beam assembly bracket foundation needs to be strengthened. The support foundation is compacted with a road roller, and a 20cm hardened concrete layer is poured, and the support concrete foundation is poured on the hardened concrete layer; (3) support erection: an assembled support unit 1 is arranged corresponding to each longitudinal node of the steel truss girder, and the assembled support The lower bracket 4 of unit 1 is erected at the same time as the full bracket for concrete pouring, the inclination of the steel column 11 of the lower bracket is controlled within one thousandth, and the upper bracket 3 of the assembled bracket unit 1 is erected after the beam formwork is installed. The lower bracket 4 and the upper bracket 3 are connected as a whole through the lintel steel column 5 . The upper bracket 3 can be prefabricated and then integrally connected with the lintel steel column 5 .

In the utility model, the steel truss girder assembly bracket alone forms a force-bearing system. When the steel truss girder is assembled, the steel truss girder assembly supports the entire weight of the steel truss girder, and the load is directly transmitted to the concrete foundation, reducing the overall support. The local pressure burden ensures the safety of construction.

In the utility model, the steel truss beam assembly support and the beam body concrete pouring full hall support are constructed at the same time and are independent of each other. The steel truss beam assembly support bears the pressure of the steel truss beam alone, which avoids the stress of the beam body concrete pouring support at the node position of the steel truss beam. Excessive concentration, the elastic deformation of the bracket is much smaller than that of the beam concrete poured full-wall bracket, which is conducive to the accurate positioning of the steel truss girder joints. During the assembly construction of the steel truss girder, a vertical jack can be arranged on the upper beam 6 of the steel truss girder assembly support, so as to facilitate the linear adjustment of the beam body.

Other parts in this embodiment adopt the prior art, and will not be repeated here.

This embodiment is only used to illustrate the utility model, and it is not intended to limit the utility model. Without departing from the spirit and essence of the utility model, those skilled in the art should be able to make various corresponding modifications according to the present invention. changes and deformations.

Claims (4)

1. A steel truss beam assembly support used in steel-concrete composite truss beam construction is characterized in that: it comprises a plurality of assembly support units (1) corresponding to the steel truss beam longitudinal nodes, each described assembly support unit (1) includes an upper bracket (3) and a lower bracket (4) correspondingly arranged at the bottom of the upper bracket (3), the lower bracket (4) is located at the lower part of the beam body, and the lower bracket (4) includes four The steel columns (11) arranged vertically and arranged in a rectangle, the lower end of each steel column (11) is connected with the concrete foundation arranged at its lower part, and the four steel columns (11) of the lower support (4) There are upper flat connection, lower flat connection and at least one connecting system (12) between them, and the upper bracket (3) includes two side brackets arranged transversely along the steel truss girder and an upper beam (6) connected to the upper ends of the two side brackets ), the side support includes a triangular support I (7) and a triangular support II (8), the triangular support I (7) is vertically arranged, and its upper end is connected with the upper beam (6), and the triangular support II (8 ) is obliquely arranged on the outside of the triangular bracket I (7), its lower end is fixed with the lower end of the triangular bracket I (7), its upper end is connected with the upper beam (6) and is located outside the triangular bracket I (7), the Between the two side brackets of the upper bracket (3) there is an upper bracket bottom flat connection (10) and an upper bracket flat connection (9), and at least a diagonal connection (16) is provided on the triangular bracket I (7). The upper ends of the four steel columns (11) of the lower bracket (4) are respectively fixedly connected with a solid lintel steel column (5), and the lintel steel column (5) passes through the beam body and is fixed to the lower end of the upper bracket (3). connect. 2. The steel truss girder assembly bracket used in the construction of steel-concrete composite truss girders according to claim 1, characterized in that: the upper beam (6) is formed by assembling and welding two I-beams side by side. 3. The steel truss beam assembly support used in the construction of steel-concrete composite truss beams according to claim 1 or 2, characterized in that: the diameter of the lintel steel column (5) is 120 mm. 4. A steel-concrete composite truss beam construction support system, including a full-scale support for concrete pouring, characterized in that: it also includes a steel truss beam assembly support as described in any one of claims 1 to 3, corresponding to each An assembled support unit (1) of the steel truss assembled support is arranged between two steel truss beam longitudinal nodes, the concrete pouring support and the steel truss assembled support share a foundation, and the lower support (4) of the assembled support unit (1) ) is located at the lower part of the beam body, the upper bracket (3) of the assembled bracket unit (1) is located at the upper part of the beam body, and the lower bracket (4) and the upper bracket (3) of the assembled bracket unit (1) pass through the beam body The lintel steel column (5) is connected.