CN209260529U - A new type of composite truss beam - Google Patents

Abstract

A new type of combined truss girder. The truss girder is welded by the upper chord, the lower chord, two inclined bar groups and the vertical bar. Both sides of the upper chord and the lower chord are equipped with male and female joints for connection. There are truss connection pin holes connected with other truss beams on the female joint and the other truss beams respectively. Both are equipped with connecting blocks, and the two channel steels are equipped with connecting blocks. The vertical bars, upper chords and lower chords are all equipped with fixed blocks for positioning and fixing the inclined bars. The fixed blocks are provided with slopes, and the slopes are set There are positioning grooves to prevent the oblique rod from moving. The structure of this truss beam is simple and reasonable. The bearing capacity of bridges composed of truss girders and truss girders is determined.

Description

A new type of composite truss beam

technical field

The utility model relates to the technical field of truss beams, in particular to a novel combined truss beam.

Background technique

Truss girder refers to a girder formed by connecting a web composed of many slats and two flanges. Truss girders are generally used in the construction of trestles, drilling platforms, cast-in-place supports, gantry cranes, bridge erecting machines, and hanging baskets.

The spans of existing truss girders are all fixed in size. When constructing some projects with large spans, many truss girders need to be combined to form them. However, the more truss girders are combined, the worse the bearing capacity of the bridge will be. The existing upper chord and lower chord of the truss are only made of ordinary steel, so that the bearing capacity of the truss itself is limited, and the combination of multiple trusses greatly reduces the bearing capacity of the bridge itself.

Utility model content

The purpose of this utility model is to provide a new type combined truss beam, which has a simple and reasonable structure. Rods greatly enhance the bearing capacity of bridges composed of trusses and trusses.

The purpose of this utility model is achieved in the following way: a new combined truss girder, characterized in that the truss girder is welded by the upper chord, the lower chord, two oblique rod groups and the vertical rod, and the welding method is partial penetration The lower chord is arranged directly below the upper chord, and the upper chord and the lower chord are aligned with each other. Both sides of the upper chord and the lower chord are provided with a male joint and a female joint for connection. The male joint It is installed on the left side of the upper chord and the lower chord, and the female joint is installed on the right side of the upper chord and the lower chord. The rods are arranged between the upper chord and the lower chord for connecting the upper chord and the lower chord. Composed of four slanting rods, two slanting rod groups are respectively installed on both sides of the middle vertical rod, and are connected with the middle part of the left vertical rod and the right vertical rod at the corresponding positions, the upper end of the diagonal rod group is connected with the upper chord, and the lower end is connected with the lower chord ;

Further, the upper chord and the lower chord are both made of two channel steels that are combined in pairs to form a ] [-shape, and the two channel steels are equipped with connecting blocks, and the two connecting blocks are arranged alternately. On the corresponding channel steel, the two channel steels are combined together through the connecting block and the chord bolt holes on the connecting block with bolts and nuts. Both the rod and the reinforcing chord are provided with bolt holes, and the reinforcing chord is fixed in the groove of the upper chord and the lower chord through bolts and nuts matching the bolt holes, and the upper chord and the lower chord are also provided with connecting support frames The connecting hole of the support frame;

Further, the vertical bar, the upper chord and the lower chord are all provided with a fixed block for positioning and fixing the inclined bar, and the fixed block is provided with a slope, and the slope is arranged in the direction where the fixed block faces the inclined bar, The slope of the slope is aligned with the inclined bar, and the slope is provided with a positioning groove to prevent the movement of the inclined bar, and one end of the inclined bar is inserted into the positioning groove and connected with the fixed block;

Further, the upper chord, the lower chord, the vertical rod and the inclined rod are all made of Q345B steel plate, the length of the upper chord and the lower chord is L1, L1=4000mm, the length of the vertical rod is L2, L2= 2000mm.

Compared with the prior art, the utility model has the beneficial effects of:

Both the upper chord and the lower chord of this truss are combined with two channel steels made of Q345B steel, which makes this truss increase the bearing capacity while reducing the amount of materials used. Reinforced chords are installed to further enhance the bearing capacity of the truss girder. The truss girder uses fixed blocks to locate and fix the oblique rods, so that the chute of the truss girder is fixed firmly and will not be misplaced, preventing the chute from being used for a long time. It leads to dislocation of the chute, reduces the bearing capacity of the truss girder, causes the bridge to collapse, and endangers people's safety.

Description of drawings

Fig. 1 is a structural diagram of the utility model.

Figure 2 is a structural diagram of the upper chord.

Figure 3 is a block diagram of the fixed block.

Fig. 4 is an enlarged view of direction A in Fig. 1 .

Fig. 5 is an enlarged view of direction B in Fig. 1 .

FIG. 6 is an enlarged view of direction C in FIG. 1 .

Among them, 1 is the upper chord, 11 is the male joint, 12 is the female joint, 13 is the truss connecting pin hole, 14 is the channel steel, 141 is the connecting block, 142 is the chord bolt hole, 15 is the reinforcing chord, and 16 is the support Frame connection hole, 2 is the lower chord, 3 is the oblique bar, 4 is the vertical bar, 5 is the fixed block, 51 is the slope, and 52 is the positioning groove.

Detailed ways

As shown in Figure 1-6, a new type of combined truss girder is characterized in that the truss girder is welded by the upper chord 1, the lower chord 2, two oblique rod groups and the vertical rod 4, and the welding method is partial melting Through the welding seam, the lower chord 2 is arranged directly below the upper chord 1, and the upper chord 1 and the lower chord 2 are aligned with each other, and both sides of the upper chord 1 and the lower chord 2 are provided with male joints 11 for connection and the female joint 12, the male joint 11 is installed on the left side of the upper chord 1 and the lower chord 2, and the female joint 12 is installed on the right side of the upper chord 1 and the lower chord 2, and the male joint 11 and the female joint 12 are respectively There are truss connection pin holes 13 connected with other truss girders. The vertical rods 4 are arranged between the upper chord 1 and the lower chord 2 for connecting the upper chord 1 and the lower chord 2. The vertical rods 4 are respectively set At the left, middle and right ends of the upper chord 1 and the lower chord 2, each slanting rod group consists of four slanting rods placed in a rhombus shape. The vertical bar 4 at the left end of the position is connected with the vertical bar 4 at the right end, the upper end of the inclined bar group is connected with the upper chord 1, and the lower end is connected with the lower chord 2.

Further, the upper chord 1 and the lower chord 2 are both formed by two pairs of channel steels 14 that are combined in opposite directions to form] [glyphs, the two channel steels 14 are equipped with connecting blocks 141, and the two connecting Blocks 141 are arranged alternately on the corresponding channel steel 14, and the two channel steels 14 are combined together through the connecting block 141 and the chord bolt holes 142 on the connecting block 141 with bolts and nuts. The upper chord 1 and the lower chord 2 Reinforcement chords 15 are installed in the grooves of the upper chord 1, lower chord 2 and reinforcement chords 15, and bolt holes are arranged in the reinforcement chords 15. 1 and the groove of the lower chord 2, the upper chord 1 and the lower chord 2 are also provided with a support frame connecting hole 16 for connecting the support frame.

Further, the vertical bar 4, the upper chord 1 and the lower chord 2 are all provided with a fixed block 5 for positioning and fixing the oblique bar 3, and the fixed block 5 is provided with a slope 51, and the slope 51 is arranged on the fixed block. 5. In the direction facing the oblique rod 3, the slope surface of the slope 51 is aligned with the oblique rod 3, and the slope 51 is provided with a positioning groove 52 to prevent the oblique rod 3 from moving, and one end of the oblique rod 3 is inserted into the positioning groove 52 Connect with fixed block 5 inside.

Further, the upper chord 1, the lower chord 2, the vertical rod 4 and the inclined rod 3 are all made of Q345B steel plate, the length of the upper chord 1 and the lower chord 2 is L1, L1=4000mm, the vertical rod 4 The length of L2, L2=2000mm.

The utility model is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the utility model, those skilled in the art can make some technical features based on the disclosed technical content without creative work. Replacement and deformation, these replacements and deformations are all within the protection scope of the present utility model.

Claims (4)

1. a kind of novel combination type trusses, which is characterized in that trusses is by top boom (1), lower boom (2), two brace groups and erects Bar (4) is welded, which is partial penetration weld seam, and the lower boom (2) is arranged immediately below top boom (1), and It is mutually aligned between top boom (1) and lower boom (2), the top boom (1) and lower boom (2) two sides are equipped with the sun of connection Connector (11) and famale connector (12), the male contact (11) are mounted on the left of top boom (1) and lower boom (2), the famale connector (12) be mounted on the right side of top boom (1) and lower boom (2), be respectively equipped on the male contact (11) and famale connector (12) and other Trusses truss connecting pin bores (13) interconnected, the vertical bar (4) are arranged between top boom (1) and lower boom (2), are used for Connect top boom (1) and lower boom (2), the vertical bar (4) be separately positioned on top boom (1) and lower boom (2) left end, middle part and In right end position, each brace group is made of four braces (3) for being put into diamond shape, and two brace groups are separately mounted to middle part vertical bar (4) two sides, and connect with the left end vertical bar (4) of corresponding position and right end vertical bar (4), brace group upper end is connect with top boom (1), Lower end is connect with lower boom (2).

2. a kind of novel combination type trusses according to claim 1, it is characterised in that: the top boom (1) and lower boom (2) be all made of two to be combined into opposite to each other in couples [ channel steel (14) of font is composed, the company of being equipped in two channel steels (14) It connects block (141), for the interlaced setting of two link blocks (141) on corresponding channel steel (14), two channel steels (14) pass through company Chord bolt hole (142) the fitted bolt nut connect on block (141) and link block (141) is combined, the top boom (1) Reinforce chord member (15) with being mounted in the groove of lower boom (2), the top boom (1), lower boom (2) and reinforcement chord member (15) It is inside equipped with bolt hole, the reinforcement chord member (15) is fixed on top boom (1) and lower edge by screw bolt and nut fitted bolt hole In the groove of bar (2), the support frame connecting hole (16) of connection support frame is additionally provided on the top boom (1) and lower boom (2).

3. a kind of novel combination type trusses according to claim 1, it is characterised in that: the vertical bar (4), top boom (1) With the fixed block (5) for being equipped with positioning and fixed brace (3) on lower boom (2), the fixed block (5) is equipped with slope (51), The slope (51) is arranged on the direction of fixed block (5) face brace (3), and the slope surface of the slope (51) is directed at brace (3), The slope (51) is equipped with the locating slot (52) for preventing brace (3) mobile, and brace (3) one end insertion locating slot (52) is interior It is connect with fixed block (5).

4. a kind of novel combination type trusses according to claim 3, it is characterised in that: the top boom (1), lower boom (2), vertical bar (4) and brace (3) are all made of Q345B steel plate and are made, and the length of the top boom (1) and lower boom (2) is L1, L1 =4000mm, the length of the vertical bar (4) are L2, L2=2000mm.