Fish-belly type suspension cable combined bracket and construction method thereof

Abstract

The present invention discloses a fish-belly type suspension cable combination bracket and a construction method thereof. The fish-belly type suspension cable combination bracket is arranged at the bottom of a steel main beam, and includes a flat connecting rod, an upper column, an end fixing block and a cable. The bottom of the flat connecting rod is connected to a plurality of rows of upper columns arranged in parallel, and the left and right sides of the flat connecting rod are provided with the end fixing blocks, and the end fixing blocks are connected to the steel main beam. The upper columns are connected in the transverse direction by the cable and the two ends of the cable are respectively connected to the left and right sides of the flat connecting rod, and an upper jack is provided at the upper end of the upper column. The advantages of the present invention are: it can effectively solve the settlement problem of the bracket, and for a large-span composite beam structure, it can efficiently achieve full combination before bearing the structural load, greatly improving the economy of the bridge structure.

Description

Technical Field

[0001] The invention relates to the technical field of bridge supports, in particular to a fish-belly type suspension cable combined support and a construction method thereof. Background Art

[0002] At present, there are many forms of known support systems for bridge construction, such as Bailey support, bowl-hook support, portal support, etc. Traditional support systems have problems such as settlement and deformation. When the structure span is large or the terrain and structure itself are complex, they are often unable to be used, and often face the need to take complicated and expensive construction measures such as foundation treatment and preloading. When the structure is very high or crosses special terrain such as protected areas and river canyons, traditional supports cannot be used or it is very uneconomical to use traditional supports. Bridge construction must use expensive large equipment such as bridge-building machines. When the structure span is large, the cost of transportation and erection of large bridges is extremely high. Summary of the invention

[0003] The purpose of the present invention is to provide a fish-belly type suspension cable combination bracket based on the above-mentioned deficiencies of the prior art. The bracket is installed at the bottom of the steel main beam through the end fixing block, and forms a self-supporting structure by tensioning the cable, thereby solving the problem of settlement deformation.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A fish-belly type suspension cable combination bracket is arranged at the bottom of a steel main beam, and is characterized in that it includes a flat connecting rod, an upper column, an end aiming block and a cable, wherein the bottom of the flat connecting rod is connected to a plurality of rows of upper columns arranged in parallel, the left and right sides of the flat connecting rod are provided with the end aiming blocks, the end aiming blocks are connected to the steel main beam, the upper columns are connected in the transverse direction through the cable and the two ends of the cable are respectively connected to the left and right sides of the flat connecting rod, and an upper jack is provided at the upper end of the upper column.

[0006] The flat connecting rod includes a cross bar and a longitudinal rod, the upper column is arranged along the length direction of the cross bar, and the length of the upper column increases from the left side of the cross bar to the middle of the cross bar, and decreases from the middle of the cross bar to the right side of the cross bar.

[0007] The upper columns are connected in the longitudinal direction by connecting rods, and the side parts of the upper columns are connected to the flat connecting rods by side rods.

[0008] The lower ends of the upper column and the end aiming block are both provided with lower columns, and lower jacks are both provided between the upper column and the lower column, and between the end aiming block and the lower column.

[0009] A construction method for a fish-belly type suspension cable combined support, characterized in that: the construction method comprises:

[0010] a. erecting the steel main beam on the bridge pier, and setting a support between the top of the bridge pier and the end of the steel main beam;

[0011] b. manufacturing the fish-belly type suspension cable combined bracket, anchoring the fish-belly type suspension cable combined bracket to the bottom of the steel main beam through the end anchoring block, and tensioning the cable to form a self-supporting structure;

[0012] c. erecting the prefabricated bridge deck, adjusting the lifting force of the upper jack at the upper end of the upper column to a reasonable value, and then combining and casting the steel main beam and the prefabricated bridge deck;

[0013] d. After the strength of the joint surface reaches the design requirement, release the lifting force of the upper jack, finally separate the end aiming block from the steel main beam, remove the fishbelly suspension cable combination bracket, and complete the construction.

[0014] A construction method for a fish-belly type suspension cable combined support, characterized in that: the construction method comprises:

[0015] a. Make the fish-belly type suspension cable combination bracket, install the lower column and the fish-belly type suspension cable combination bracket on the top of the lower column, and install the lower jack between the lower column and the upper column of the fish-belly type suspension cable combination bracket, the lower column and the end fixing block of the fish-belly type suspension cable combination bracket;

[0016] b. The steel main beam is hoisted and installed in sections on the fish-bellied cable combined bracket, the two ends of the steel main beam are arranged on the bridge pier, and a support is arranged between the top of the bridge pier and the end of the steel main beam, and the fish-bellied cable combined bracket is anchored to the two ends of the steel main beam through the end fixing blocks;

[0017] c. Adjust the telescopic length of the lower jack to connect the steel main beam into a whole, and tension the cable to form a self-supporting structure, and then remove the lower column and the lower jack thereon;

[0018] d. erecting the prefabricated bridge deck, adjusting the lifting force of the upper jack at the upper end of the upper column to a reasonable value, and then combining and casting the steel main beam and the prefabricated bridge deck;

[0019] e. After the strength of the joint surface reaches the design requirement, release the lifting force of the upper jack, finally separate the end aiming block from the steel main beam, remove the fish-belly suspension cable combination bracket, and complete the construction.

[0020] The advantages of the present invention are that the settlement problem of the support can be effectively solved, and for a large-span composite beam structure, the structural load can be borne after being fully combined efficiently, thereby greatly improving the economy of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a vertical view of the hanging self-supporting fish belly type suspension bracket in the present invention;

[0022] Figure 2 It is a cross-sectional view of the hanging self-supporting fish-belly type suspension bracket in the present invention;

[0023] Figure 3 It is a vertical view of the supporting fish-belly type suspension bracket in the present invention;

[0024] Figure 4 It is a cross-sectional view of the supporting fish-belly type suspension bracket in the present invention. DETAILED DESCRIPTION

[0025] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0026] like Figure 1-4 As shown, the marks 1-14 in the figure respectively represent: cable 1, upper column 2, flat connecting rod 3, end anchor block 4, upper jack 5, steel main beam 6, lower column 7, lower jack 8, pier 9, support 10, prefabricated bridge panel 11, connecting rod 12, side rod 13, and abutment 14.

[0027] Example 1: Figure 1 and Figure 2 As shown, this embodiment relates to a fish-belly type suspension cable combination bracket. In this embodiment, the bracket is a hanging self-supporting fish-belly type suspension cable bracket, which is arranged at the bottom of the steel main beam 6. It mainly includes a flat connecting rod 3, an upper column 2, an end fixing block 4 and a cable 1. The bottom of the flat connecting rod 3 is connected with two rows of upper columns 2 arranged in parallel. Two end fixing blocks 4 are arranged on the left and right sides of the flat connecting rod 3, and the end fixing blocks 4 are connected to the steel main beam 6. The flat connecting rod 3 includes a cross bar and a longitudinal bar. The upper column 2 is arranged along the length direction of the cross bar, and the length of the upper column 2 increases from the left side of the cross bar to the middle of the cross bar, and decreases from the middle of the cross bar to the right side of the cross bar, so that the reaction force of each upper column 2 is relatively uniform after the cable 1 is tensioned. In implementation, the vertical axial force of the upper column 2 can be adjusted by adjusting the length of the upper column 2. An upper jack 5 is arranged at the upper end of the upper column 2, and the upper jack 5 provides a certain lifting force for the steel main beam 6. In the construction of the steel-concrete composite beam, the internal force between the steel beam and the concrete bridge deck can be flexibly adjusted by changing the length of the upper column 2 and the upper force of the upper jack 5 to achieve the optimal state of structural stress.

[0028] like Figure 1 and Figure 2As shown, in the transverse direction, the bottom ends of the upper columns 2 are connected by a cable 1, and the two ends of the cable 1 are respectively connected to the left and right sides of the horizontal connecting rod 3. By tensioning the cable 1, a self-supporting structure can be formed; in the longitudinal direction, the bottom ends of the upper columns 2 are connected by a connecting rod 12, which increases the stability of the hanging self-supporting fish belly suspension bracket. In addition, the side of the upper column 2 is connected to the horizontal connecting rod 3 through multiple side rods 13 to form a triangular structure for reinforcing the connection between the upper column 2 and the horizontal connecting rod 3.

[0029] like Figure 1 and Figure 2 As shown, this embodiment has the following construction method:

[0030] a. Install the steel main beam 6 on the bridge pier 9, and set a support 10 between the top of the bridge pier 9 and the end of the steel main beam 6;

[0031] b. According to the actual situation, a suitable hanging self-supporting fish-belly type suspension cable bracket is made, and the hanging self-supporting fish-belly type suspension cable bracket is anchored to the bottom of the steel main beam 6 through the end fixing block 4, and the cable 1 is tensioned to form a self-supporting structure;

[0032] c. Erect the prefabricated bridge deck 11, adjust the lifting force of the upper jack 5 at the upper end of the upper column 2 to a reasonable value, and then cast the steel main beam 6 and the prefabricated bridge deck 11 together;

[0033] d. After the strength of the joint surface reaches the design requirement, release the lifting force of the upper jack 5, and finally separate the end aiming block 4 from the steel main beam 6, remove the hanging self-supporting fish belly suspension bracket, and complete the construction.

[0034] Example 2: Figure 3 and Figure 4As shown, this embodiment relates to a fish-belly suspension combined bracket. In this embodiment, the bracket is a supporting fish-belly suspension bracket, which is arranged at the bottom of the steel main beam 6. It mainly includes a flat connecting rod 3, an upper column 2, an end fixing block 4, a cable 1 and a lower column 7. The bottom of the flat connecting rod 3 is connected with two rows of upper columns 2 arranged in parallel. Two end fixing blocks 4 are respectively arranged on the left and right sides of the flat connecting rod 3. The end fixing blocks 4 are connected to the steel main beam 6. The flat connecting rod 3 includes a cross bar and a longitudinal bar. The upper column 2 is arranged along the length direction of the cross bar, and the length of the upper column 2 increases from the left side of the cross bar to the middle of the cross bar, and decreases from the middle of the cross bar to the right side of the cross bar. An upper jack 5 is arranged at the upper end of the upper column 2, and the upper jack 5 provides a certain lifting force for the steel main beam 6. The lower ends of the upper column 2 and the end aiming block 4 are both provided with a lower column 7, and lower jacks 8 are provided between the upper column 2 and the lower column 7, and between the end aiming block 4 and the lower column 7. The lower jacks 8 are used to lift the upper column 2 and the end aiming block 4, and then adjust the position of the segmented steel main beam 6, so that the segmented steel main beam 6 is connected as a whole. Specifically, the lower column 7 at the lower end of the end aiming block 4 can be set on the pedestal 14, and the lower column 7 at the lower end of the upper column 2 can be set on the ground or other supporting structures. In addition, the lower columns 7 can also be connected and reinforced in the longitudinal direction by connecting pieces.

[0035] like Figure 3 and Figure 4 As shown, in the transverse direction, the bottom ends of the upper columns 2 are connected by a cable 1, and the two ends of the cable 1 are respectively connected to the left and right sides of the horizontal connecting rod 3. By tensioning the cable 1, a self-supporting structure can be formed; in the longitudinal direction, the bottom ends of the upper columns 2 are connected by a connecting rod 12, which increases the stability of the hanging self-supporting fish belly suspension bracket. In addition, the side of the upper column 2 is connected to the horizontal connecting rod 3 through multiple side rods 13 to form a triangular structure for reinforcing the connection between the upper column 2 and the horizontal connecting rod 3.

[0036] like Figure 3 and Figure 4 As shown, this embodiment has the following construction method:

[0037] a. Make a suitable supporting fish-belly type suspension bracket according to the actual situation, then install the lower column 7 and the supporting fish-belly type suspension bracket on the top of the lower column 7, and install the lower jack between the lower column 7 and the upper column 2, and between the lower column 7 and the end anchor block 4;

[0038] b. The steel main beam 6 is hoisted and erected in sections on the supporting fish-belly type suspension bracket. The two ends of the steel main beam 6 are arranged on the bridge pier 9, and a support 10 is arranged between the top of the bridge pier 9 and the end of the steel main beam 6. The supporting fish-belly type suspension bracket is anchored to the two ends of the steel main beam 6 through the end fixing block 4;

[0039] c. Adjust the telescopic length of the lower jack 8 to connect the steel main beam 6 into a whole, and tension the cable 1 to form a self-supporting structure, and then remove the lower column 7 and the lower jack 8 thereon;

[0040] d. Erect the concrete bridge deck 11, adjust the lifting force of the upper jack 5 at the upper end of the upper column 2 to a reasonable value, and then cast the steel main beam 6 and the concrete bridge deck 11 together;

[0041] e. After the strength of the joint surface reaches the design requirement, release the lifting force of the upper jack 5, and finally separate the end aiming block 4 from the steel main beam 6, remove the supporting fish belly suspension bracket, and complete the construction.

[0042] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A construction method of a fish-belly type suspension cable combined bracket, which is arranged at the bottom of a steel main beam, characterized in that: It includes a flat connecting rod, an upper column, an end aiming block and a cable. The bottom of the flat connecting rod is connected to a plurality of rows of upper columns arranged in parallel. The left and right sides of the flat connecting rod are provided with the end aiming blocks. The end aiming blocks are connected to the steel main beam. The upper columns are connected in the transverse direction by the cable and the two ends of the cable are respectively connected to the left and right sides of the flat connecting rod. The upper end of the upper column is provided with an upper jack. The lower ends of the upper column and the end aiming block are both provided with lower columns, and lower jacks are both provided between the upper column and the lower column, and between the end aiming block and the lower column; The construction method of the fish-belly type suspension cable combined support comprises the following steps: a. Make the fish-belly type suspension cable combination bracket, install the lower column and the fish-belly type suspension cable combination bracket on the top of the lower column, and install the lower jack between the lower column and the upper column of the fish-belly type suspension cable combination bracket, the lower column and the end fixing block of the fish-belly type suspension cable combination bracket; b. The steel main beam is hoisted and installed in sections on the fish-bellied cable combined bracket, the two ends of the steel main beam are arranged on the bridge pier, and a support is arranged between the top of the bridge pier and the end of the steel main beam, and the fish-bellied cable combined bracket is anchored to the two ends of the steel main beam through the end fixing blocks; c. Adjust the telescopic length of the lower jack to connect the steel main beam into a whole, and tension the cable to form a self-supporting structure, and then remove the lower column and the lower jack thereon; d. erecting the prefabricated bridge deck, adjusting the lifting force of the upper jack at the upper end of the upper column to a reasonable value, and then combining and casting the steel main beam and the prefabricated bridge deck; e. After the strength of the joint surface reaches the design requirement, release the lifting force of the upper jack, finally separate the end aiming block from the steel main beam, remove the fish-belly suspension cable combination bracket, and complete the construction.

2. The construction method of a fish-belly type suspension cable combined support according to claim 1, characterized in that: The flat connecting rod includes a cross bar and a longitudinal rod, the upper column is arranged along the length direction of the cross bar, and the length of the upper column increases from the left side of the cross bar to the middle of the cross bar, and decreases from the middle of the cross bar to the right side of the cross bar.

3. The construction method of a fish-belly type suspension cable combined support according to claim 1 or 2, characterized in that: The upper columns are connected in the longitudinal direction by connecting rods, and the side parts of the upper columns are connected to the flat connecting rods by side rods.

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