CN110344332A - A support for the construction of the beam on the main tower of the bridge - Google Patents

Abstract

The invention discloses a support for constructing an upper cross beam of a main tower of a bridge, which comprises: the structure comprises two main tower towers which are oppositely arranged left and right, a plurality of assembled brackets which are connected with the two main tower towers in parallel in the longitudinal bridge direction between the two main tower towers, oblique leg bearing frames and arch-shaped steel trusses, wherein the assembled brackets are arranged at the tops of all the assembled brackets side by side, the oblique leg bearing frames and the assembled brackets are welded into a whole through the stiffening plates at the tops of the brackets, the longitudinal bridge direction is arranged at the structural joint of the oblique leg bearing frames, the arch-shaped steel trusses are arranged on the bearing beams in the longitudinal bridge direction, and therefore the shaping truss which is used for supporting the upper cross beam of the main tower is formed. The invention has the advantages that: simple structure, the installation is dismantled conveniently, and the material quantity is few, and use cost is low, and high altitude steel construction hoist and mount risk is little, and the construction safety is high, and construction period is short.

Description

A support for the construction of the beam on the main tower of the bridge

technical field

The invention relates to the technical field of bridge construction, in particular to a support for the construction of a crossbeam on a main tower of a bridge.

Background technique

The main tower is one of the important stress-bearing components of the bridge, which mainly bears the pressure transmitted by the main cable. In order to increase the lateral stiffness of the main tower and ensure the rationality of the structural stress, an upper beam and a lower beam are generally arranged between the two columns of the main tower. For the upper beam of the main tower, steel pipe scaffolding or steel pipe columns and other ground supports are used for construction and installation at present. This construction method has the disadvantages of large amount of support materials, high cost of use, high risk of high-altitude steel structure hoisting, low construction safety, and long construction period. and other shortcomings.

Contents of the invention

The purpose of the present invention is to provide a support for the construction of the upper beam of the bridge main tower with low cost and high construction safety.

In order to achieve the above object, the present invention adopts the following technical scheme: the support for the construction of the upper beam of the bridge main tower includes: two left and right main tower columns opposite to each other, assembled corbels, inclined leg load-bearing frames, The arched steel truss is characterized in that a number of assembled corbels connecting the two main tower columns are arranged side by side in the longitudinal bridge direction between the two main tower columns, and stiffening plates are arranged on the top of all the assembled corbels , the oblique leg load-bearing frame and the assembled corbel are welded into a whole through the stiffening plate on the top of the corbel, and the longitudinal bridge direction load-bearing beam is set at the structural connection of the oblique leg load-bearing frame, and the arched steel truss is arranged in the longitudinal bridge direction on the load-bearing beam to form The shaped truss used to support the beam on the main tower.

Further, the above-mentioned support for the construction of the upper beam of the main tower of the bridge, wherein: when the concrete of the tower column is poured, the locking hole and the load-bearing groove are reserved, and after all the assembled corbels are inserted into the load-bearing groove of the tower column, they pass through the tower column. The precision-rolled rebar of the locking hole is fixed with the tower column.

Further, the above-mentioned support for the construction of the beam on the main tower of the bridge, wherein: the slanted leg load-bearing frame structure includes: multiple pieces of slanted leg load-bearing frames are arranged side by side in the longitudinal direction of the bridge, and the slanted leg load-bearing frames are connected by channel steel to form a whole , to enhance the overall stability of the structure; taking advantage of the characteristics of axial tension and pressure of the steel pipe structure, the load-bearing frame of the inclined legs is composed of inclined steel pipes and horizontal steel pipes. The joints are fixed with two through-core steel plates.

Further, the above-mentioned support for the construction of the upper beam of the main tower of the bridge, wherein: the specific connection structure of the inclined leg load-bearing frame is: on the side near the middle of the connection point between the horizontal steel pipe and the inclined steel pipe, the horizontal steel pipe and the load-bearing corbel, and the inclined steel pipe Flanges are respectively provided for connection with the load-bearing corbels, and the structure is detachably connected and fixed together through the butt locking of the flanges, which is convenient for installation and removal in pieces.

Further, the above-mentioned bracket for the construction of the upper beam of the main tower of the bridge, wherein: the single-piece slanted-leg load-bearing frame is divided into three parts through each flange plate, and when installing, the slanted-leg tripods on both sides are first installed symmetrically, and connected with the tower column The corbels are fixed, and finally the middle horizontal pipe is installed.

Further, the above-mentioned support for the construction of the upper beam of the main tower of the bridge, wherein: at the connection position between the horizontal steel pipe and the load-bearing corbel, and at the top of the connection between the inclined steel pipe and the horizontal steel pipe, a longitudinal load-bearing beam is arranged to ensure that the steel pipe frame mainly bears axial force and prevents The structure produces a large bending moment.

Further, the aforementioned support for the construction of the beam on the main tower of the bridge, wherein: the specific connection structure of the arched steel truss is: mainly composed of vertical rods, horizontal rods and oblique rods, each rod is shaped steel or I-beam, and the nodes The connection position is reinforced by steel plates, the arc of the arch ring is the same as that of the beam, the lower part is connected with the load-bearing beam, and the longitudinal pieces are connected by I-beams between nodes to form a whole.

Through the implementation of the above technical solution, the beneficial effects of the present invention are: simple structure, convenient installation and maintenance, less material consumption, low cost of use, low risk of hoisting high-altitude steel structures, high construction safety, and short construction period.

Description of drawings

Fig. 1 is a structural schematic diagram of a support for beam construction on a bridge main tower according to the present invention.

FIG. 2 is an enlarged schematic view of the E portion shown in FIG. 1 .

FIG. 3 is an enlarged schematic view of a portion F shown in FIG. 1 .

FIG. 4 is an enlarged schematic view of a portion G shown in FIG. 1 .

Fig. 5 is a schematic diagram showing the positional relationship of each oblique leg load-bearing frame in the top view direction of Fig. 1 .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the support for the construction of the upper beam on the main tower of a bridge includes: two main tower columns 1 arranged opposite to each other on the left and right, an assembled corbel 8. Slanted leg load-bearing frame, arched steel truss 4, in this example, a number of assembled corbels 8 connecting the two main tower columns are arranged side by side in the longitudinal bridge direction between the two main tower columns 1 , the tops of all fabricated corbels are provided with stiffening plates, and the oblique leg bearing frame and the fabricated corbel are welded into a whole through the stiffening plate on the top of the corbel. Arched steel trusses 4 are arranged longitudinally on the beam 9 to form a shaped truss for supporting the upper beam of the main tower.

In this example, the locking holes and load-bearing grooves are reserved during the concrete pouring of the tower column 1. After all the assembled corbels 8 are inserted into the load-bearing grooves of the tower column, they are fixed to the tower column through the precision-rolled rebar passing through the locking holes of the tower column. .

In this example, the slanted leg load-bearing frame structure includes: multiple slanted leg load-bearing frames are arranged side by side in the longitudinal direction of the bridge, and each piece of slanted-leg load-bearing frame is connected by channel steel flat joints 5 and scissor braces 6 to form a whole to enhance the overall stability of the structure characteristics; utilizing the characteristics of axial tensile and compressive strength of the steel pipe structure, the inclined leg load-bearing frame is composed of inclined steel pipes 11 and horizontal steel pipes 21 and 22. Two pieces of through-core steel plates 10 are used for stiffening and fixing at the connecting nodes. Flanges 7 are respectively arranged at the connection point between the horizontal steel pipe 21 and the inclined steel pipe 11 near the middle, the horizontal steel pipe 21 and the load-bearing corbel 8, and the connection between the inclined steel pipe 11 and the load-bearing corbel 8, and the structure is locked through the flange 7 And they are detachably connected and fixed together, which is convenient for installation and removal of pieces.

In this example, a longitudinal load-bearing beam 9 is provided at the connection position between the horizontal steel pipe 21 and the load-bearing corbel 8, and at the top of the connection between the inclined steel pipe 11 and the horizontal steel pipe 21, so as to ensure that the steel pipe frame mainly bears axial force and prevents the structure from generating a large bending moment.

In this example, the specific connection structure of the arched steel truss 4 is as follows: it is mainly composed of vertical rods, horizontal rods and oblique rods. Similarly, the lower part is connected with the load-bearing beam, and the vertical plates are connected by the I-beams between the nodes to form a whole.

During installation, the single-piece slanted-leg load-bearing frame is divided into three parts by each flange 7, and the assembled corbel 8, the slanted-leg tripod G on both sides and the arched steel truss 4 are processed and formed in the back field first. Then use the tower crane to symmetrically install the diagonal leg tripod G on both sides, and fix it with the load-bearing corbel 8 through the flange plate 7, and finally install and close the horizontal pipe 22. After the installation of each diagonal leg bearing frame is completed, install the diagonal leg bearing frame The inter-level joint 5 forms a whole with scissors braces 6, and load-bearing beams 9 and arched steel trusses 4 are gradually installed on the inclined-leg load-bearing frame in order to complete the installation of the crossbeam bracket on the main tower of the bridge.

The invention has the advantages of simple structure, convenient installation and disassembly, less material consumption, low use cost, low risk of hoisting high-altitude steel structures, high construction safety and short construction period.

Claims (7)

1. A support for beam construction on the main tower of a bridge, comprising: two left and right main tower columns opposite to each other, assembled corbels, oblique leg load-bearing frames, and arched steel trusses, characterized in that: The longitudinal bridge between the tower columns is arranged side by side in front and back, and a number of assembled corbels connecting the two main tower columns are arranged. Stiffening plates are installed on the top of all the assembled corbels, and the oblique leg bearing frame and the assembled corbel pass through the top of the corbel. The stiffened plates are welded into a whole, and the longitudinal bridge-direction load-bearing beams are arranged at the connection of the inclined-leg load-bearing frame structure, and the arch-shaped steel trusses are arranged in the longitudinal bridge direction on the load-bearing beams to form a shaped truss for supporting the upper beam of the main tower. 2. The bracket for the construction of the beam on the main tower of a bridge according to claim 1, characterized in that: when the tower column is concreted, a locking hole and a load-bearing groove are reserved, and all assembled corbels are inserted into the load-bearing groove of the tower column Finally, it is fixed with the tower column through the finish-rolled rebar passing through the locking hole of the tower column. 3. A support for the construction of the beam on the main tower of a bridge according to claim 1 or 2, wherein the structure of the slanted leg load-bearing frame comprises: a plurality of slanted leg load-bearing frames are arranged side by side in the longitudinal direction of the bridge, and each piece of slanted leg load-bearing The frame is connected as a whole by channel steel to enhance the overall stability of the structure. Taking advantage of the characteristics of the axial tension and pressure of the steel pipe structure, the inclined leg load-bearing frame is composed of inclined steel pipes and horizontal steel pipes. The connection between the inclined steel pipes and the horizontal steel pipes is integrated. , the horizontal steel pipes are intermittent, and are fixed with 2 through-core steel plates at the connection nodes. 4. The support for beam construction on the main tower of a bridge according to claim 3, characterized in that: the specific connection structure of the slanted leg load-bearing frame is: on the side near the middle of the connection point between the horizontal steel pipe and the inclined steel pipe, the horizontal steel pipe and the inclined steel pipe The load-bearing corbels, inclined steel pipes and load-bearing corbels are respectively provided with flanges, and the structure is detachably connected and fixed together through the butt locking of the flanges, which is convenient for piecewise installation and disassembly. 5. A bracket for the construction of the beam on the main tower of a bridge according to claim 1 or 4, characterized in that: the single-piece slanted leg load-bearing frame is divided into three parts by each flange plate, and the two sides are installed symmetrically when installing. The leg tripod is fixed with the corbel of the tower column, and finally the horizontal pipe is installed in the middle. 6. The support for beam construction on the main tower of a bridge according to claim 1, characterized in that: at the connection position between the horizontal steel pipe and the load-bearing corbel, and at the top of the connection between the inclined steel pipe and the horizontal steel pipe, a longitudinal load-bearing beam is set to ensure that the steel pipe frame It mainly bears the axial force and prevents the structure from generating large bending moments. 7. The support for beam construction on the main tower of a bridge according to claim 1, characterized in that: The specific connection structure of the arched steel truss is as follows: it is mainly composed of vertical rods, horizontal rods and oblique rods. Connection, the vertical plates are connected by I-beams between nodes to form a whole.