Large cantilever prestress bent cap truss girder support

Abstract

The utility model relates to a large cantilever prestress bent cap truss main beam support which is characterized in that the bottom of a steel stand column is fixedly installed through an embedded anchor bolt in a bearing platform, sections of the steel stand column are connected through a flange plate and a bolt, a transverse connecting rod and an inner support are arranged in the transverse bridge direction of the steel stand column, and a stand column parallel connection is arranged in the longitudinal bridge direction of the steel stand column; the bottoms of the inclined struts are welded to the steel stand columns, unloading blocks are arranged on the tops of the inclined struts and fixedly connected with the truss horizontal rods, and reinforcing rods are arranged on the upper portions of the inclined struts and connected with the steel stand columns. The utility model has the beneficial effects that the embedded anchor bolt, the transverse connecting rod, the inner support, the upright post parallel connection, the truss parallel connection and the truss diagonal bridging are adopted, so that the bottom of the steel upright post is firmly combined with the bearing platform while the structural integrity of the steel upright post is strengthened, the stability of the bracket is effectively enhanced, and the overall construction quality of a support system is improved.

Description

Technical Field

[0001] The utility model relates to the field of bridge engineering, and in particular comprises a large cantilever prestressed cap beam truss main beam bracket. Background Art

[0002] In the construction of modern bridges and high-rise buildings, large cantilever cap beams are a common structural form, widely used in practical projects due to their large cantilever distances and high load-bearing capacity. However, with the continuous advancement of construction engineering technology and the increasing complexity of project requirements, the design and construction of cast-in-place supports for large cantilever cap beams face increasing challenges. Traditional full-frame support methods and steel pipe column supports require large floor space, are slow to construct, and are difficult to construct. The steel rod threading method damages the main reinforcement and appearance of the pier column. Cantilever truss structures overcome these traditional process challenges and are therefore gradually being adopted. However, with the increasing complexity of construction environments and the continuous improvement of project quality requirements, conventional cap beam cantilever supports face challenges such as complex installation and disassembly, insufficient load-bearing capacity and stability, and low adaptability. Therefore, optimizing the main beam supports for large cantilever prestressed cap beam trusses to improve on-site construction efficiency, ensure construction stability, and enhance construction flexibility is of great practical significance. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a large cantilever prestressed cap beam truss main beam bracket.

[0004] This large cantilever prestressed cap beam truss main beam support includes: steel columns, internal supports, transverse connecting rods, diagonal braces, reinforcement rods, unloading blocks, two layers of truss horizontal rods and distribution beams fixed above the upper truss horizontal rods; the bottom of the steel column is fixedly installed by pre-buried anchor bolts in the pedestal, and the steel column segments are connected by flanges and bolts. The steel column is provided with transverse connecting rods and internal supports in the transverse bridge direction, and the steel column is provided with column parallel joints in the longitudinal bridge direction; the bottom of the diagonal brace is welded to the steel column, and an unloading block is provided on the top to be fixedly connected to the truss horizontal rod, and a reinforcement rod is provided on the upper part of the diagonal brace to connect the steel column; a truss plate is provided between the upper and lower truss horizontal rods, and the truss plate includes a truss diagonal rod and a truss vertical rod, and the truss plate is arranged with a truss parallel joint and a truss scissors brace in the longitudinal bridge direction.

[0005] Preferably, the steel columns are symmetrically mounted on the caps around the pier, and a base plate is provided at the bottom of the steel columns, which is connected to the embedded anchor bolts in the cap.

[0006] Preferably, the transverse connecting rods and the inner supports are fixedly connected to form a transverse bridge connection system between the steel columns, wherein the ends of the transverse connecting rods are respectively welded and fixed to the steel columns on both sides, and the transverse bridge connection system composed of the transverse connecting rods and the inner supports is arranged in three rows between the steel columns.

[0007] As preferred, the four columns are horizontally connected and longitudinally installed between the steel columns.

[0008] As preferred, the unloading blocks are fixedly installed on the inclined braces and the top of the steel columns, and are used for stroke adjustment when the upper support is installed or dismounted.

[0009] As preferred, the truss horizontal rods are fixedly installed between the truss plates in the longitudinal direction.

[0010] As preferred, the bolt interfaces are symmetrically arranged on the upper truss horizontal rods and the lower truss horizontal rods, and the upper truss horizontal rods and the lower truss horizontal rods are fixedly connected by using the opposite pull bolts at the bolt interfaces.

[0011] The utility model discloses a pre-embedded anchor bolt, transverse contact rod, inner support, column horizontal connection, truss horizontal connection and truss shear brace are adopted, the steel column bottom is firmly combined with the bearing platform while the integral structure of the reinforced steel column is strengthened, the stability of the support is effectively enhanced, and the overall construction quality of the support system is improved.

[0012] 1) The utility model discloses a pre-embedded anchor bolt, transverse contact rod, inner support, column horizontal connection, truss horizontal connection and truss shear brace are adopted, the steel column bottom is firmly combined with the bearing platform while the integral structure of the reinforced steel column is strengthened, the stability of the support is effectively enhanced, and the overall construction quality of the support system is improved.

[0013] 2) The utility model discloses a truss horizontal rod adopts double-layer arrangement, and each layer truss horizontal rod is assembled by three sections, and the opposite pull bolt is used for stable connection at the bolt interface arranged at the section joint in the field, the construction convenience when the truss is installed or dismounted is effectively increased by sectional division of the truss horizontal rod, and the construction efficiency is improved under the premise of guaranteeing the construction quality.

[0014] 3) The utility model discloses a diagonal brace structure is symmetrically installed on the steel column on both sides of the pier column, and the reinforcing rod is arranged on the upper portion of the diagonal brace and is transversely connected between the steel columns, the bearing capacity of the cantilever support is improved, and the safety of the construction site is guaranteed. DRAWINGS

[0015] Figure 1 It is a main view of a large cantilever prestressed cap beam truss girder support.

[0016] Figure 2 It is a side view of a large cantilever prestressed cap beam truss girder support.

[0017] The figure mark explanation: 1 - distribution beam, 2 - bolt interface, 3 - truss diagonal rod, 4 - truss vertical rod, 5 - truss horizontal rod, 6 - unloading block, 7 - reinforcing rod, 8 - inclined brace, 9 - bolt, 10 - flange plate, 11 - bottom plate, 12 - transverse contact rod, 13 - inner support, 14 - pier column, 15 - steel column, 16 - pre-embedded anchor bolt, 17 - bearing platform, 18 - truss plate, 19 - truss shear brace, 20 - truss horizontal connection, 21 - column horizontal connection. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the following embodiments. The following embodiments are provided solely to facilitate understanding of the present invention. It should be noted that, within the scope of the present invention, modifications may be made by a person skilled in the art without departing from the principles of the present invention. Such improvements and modifications are also within the scope of the claims of the present invention.

[0019] As an example, Figure 1 and Figure 2 As shown, this large cantilever prestressed cap beam truss main beam support includes: steel columns 15, internal supports 13, transverse connecting rods 12, diagonal braces 8, reinforcing rods 7, unloading blocks 6, truss horizontal rods 5, truss diagonal rods 3, truss vertical rods 4 and distribution beams 1 fixed above the truss horizontal rods 5.

[0020] The bottom of the steel column 15 is fixedly installed by the embedded anchor bolts 16 in the pedestal 17, and the sections of the steel column 15 are firmly connected by flanges 10 and bolts 9. The steel column 15 is provided with a transverse connecting rod 12 and an internal support 13 in the transverse bridge direction for strengthening the connection, and the steel column 15 is provided with a column parallel joint 21 in the longitudinal bridge direction; the bottom of the diagonal brace 8 is welded to the steel column 15, and a unloading block 6 is installed at the end to be fixedly connected to the upper truss horizontal rod 5. A reinforcing rod 7 is provided on the upper part of the diagonal brace 8 to enhance the transverse connection strength between the steel column 15; a truss diagonal rod 3 and a truss vertical rod 4 are provided between the upper and lower layers of the truss horizontal rod 5, and the truss horizontal rod 5 as a whole is assembled from multiple sections through bolt interfaces 2; the truss piece 18 is arranged with a truss parallel joint 20 and a truss scissors brace 19 in the longitudinal bridge direction to improve the integrity of the structure.

[0021] Specifically, the steel columns 15 are symmetrically installed on the pedestals 17 around the pier 14, and the bottom plate 11 at the bottom of the steel columns 15 is tightly connected to the embedded anchor bolts 16 in the pedestal 17 using bolts on site; the transverse bridge connection system composed of the transverse connecting rods 12 and the internal supports 13 is arranged in three rows between the steel columns 15, and the ends of the transverse connecting rods 12 are welded and fixed to the steel columns 15 on both sides; the column parallel joints 21 are provided with four rows in the longitudinal bridge direction; the steel pads 4 are symmetrically arranged on the top of the precast concrete foundation 3; the unloading blocks 6 can be adjusted in a small range of stroke to improve the accuracy and convenience of the bracket installation and disassembly construction; the truss parallel joints 20 and the truss scissors braces 19 are made of channel steel and fixed between the truss pieces 18 in the longitudinal bridge direction; the bolt interfaces 2 are symmetrically arranged on the upper and lower truss horizontal bars 5, and tension bolts are used at the bolt interfaces 2 on site to temporarily fix the multi-segment truss horizontal bar 5 components, thereby improving the convenience of truss installation and disassembly.

[0022] The installation process of the large cantilever prestressed cap beam truss main beam support is as follows:

[0023] Before installation, the support frame components are made according to the on-site construction requirements, the construction site is cleaned, and the embedded anchor bolts 16 are checked for firmness and accuracy. After the support frame components are transported to the site, the main components such as the steel columns 15, internal supports 13, transverse connecting rods 12, diagonal braces 8, reinforcing rods 7, unloading blocks 6, truss horizontal rods 5, truss diagonal rods 3, and truss vertical rods 4 are assembled and checked to ensure accuracy during on-site assembly construction.

[0024] During installation, first use bolts to tightly connect the base plate 11 of the steel column 15 with the embedded anchor bolts 16 in the pedestal 17, and assemble the steel column 15 segments, transverse connecting rods 12, internal supports 13, and column parallel joints 21 into place. Use flanges 10 and bolts 9 to firmly connect the steel column 15 segments, then install the diagonal braces 8 and reinforcing rods 7. After confirmation, install the unloading blocks 6, then splice the truss horizontal bars 5, truss diagonal bars 3, truss vertical bars 4, truss scissors braces 19, truss parallel joints 20, and distribution beams 1, and use lifting equipment to hoist them to the predetermined position. The lower part of the truss is fixedly connected to the unloading block 6. Finally, after the bracket is firmly installed, check the construction position and adjust it to the correct position using the unloading block 6.

[0025] After the construction of the current cap beam structure is completed, professional personnel on site will gradually dismantle the supporting components from top to bottom, and hoist and transport them to the next cap beam construction location for installation and use.

[0026] Example 2

[0027] As another embodiment, this embodiment 2 proposes a more specific large cantilever prestressed cap beam truss main beam bracket on the basis of embodiment 1. The structural design is novel. The truss horizontal rod 5 is designed as a splicable module to improve the convenience of on-site bracket installation and disassembly and improve the overall stress performance. The flange 10 and bolts 9 are set on the steel column 15 to adapt to construction requirements of different heights. At the same time, the bottom of the steel column 15 is firmly connected to the base 17 through the embedded anchor bolts 16 to ensure the stability of the bracket. The construction site has little impact on the lower space, the overall construction efficiency of the bracket is high, and the on-site safety is effectively guaranteed.

[0028] The steel columns 15 are symmetrically mounted on the caps 17 around the piers 14. A base plate 11 is provided at the bottom of the steel columns 15. Bolts are used on site to tightly connect the base plate 11 with the embedded anchor bolts 16 in the cap 17 to improve the lower stability of the support structure.

[0029] The transverse connecting rods 12 and the inner supports 13 are fixedly connected to form a transverse bridge connection system of the steel columns 15, wherein the ends of the transverse connecting rods 12 are respectively welded and fixed to the steel columns 15 on both sides. The transverse bridge connection system composed of the transverse connecting rods 12 and the inner supports 13 is arranged three times between the steel columns 15, thereby effectively ensuring the stability of the steel columns 15;

[0030] The four longitudinal bridge installations of the column flat link 21 are used to strengthen the connection between the longitudinal bridge steel columns 15, and the column flat link 21 is made of profile steel;

[0031] The unloading block 6 is fixedly installed on the inclined brace 8 and the top of the steel column 15, and when the upper support is installed and removed, the unloading block 6 can be used for small-range travel adjustment, so as to improve the accuracy and convenience of the support installation and removal construction;

[0032] The truss flat link 20 and the truss scissor brace 19 are made of channel steel, and are fixedly installed between the truss plates 18 in the longitudinal bridge direction, so as to ensure that the bearing capacity and stability of the upper truss structure meet the requirements;

[0033] The bolt interfaces 2 are symmetrically arranged on the upper and lower truss horizontal rods 5, and when the support is installed on site, the multi-section truss horizontal rod 5 components are temporarily fixed and connected by using the tensioning bolts at the bolt interfaces 2, so as to divide the truss horizontal rod 5 into several sections for installation and removal, thereby improving the installation and removal convenience on the basis of ensuring the construction quality.

[0034] It should be noted that the same or similar parts in the present embodiment and the first embodiment can be mutually referred to, and will not be described in detail in the present application.

[0035] The embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

Claims

1. A large cantilever prestressed cap beam truss main beam support, characterized in that: include: Steel columns, internal supports, transverse connecting rods, diagonal braces, reinforcement rods, unloading blocks, two-layer truss horizontal rods and distribution beams fixed above the upper truss horizontal rods; the bottom of the steel column is fixedly installed by pre-buried anchor bolts in the pedestal, and the steel column segments are connected by flanges and bolts. The steel column is provided with transverse connecting rods and internal supports in the transverse bridge direction, and the steel column is provided with column parallel joints in the longitudinal bridge direction; the bottom of the diagonal brace is welded to the steel column, and an unloading block is provided on the top to fix it with the truss horizontal rod, and a reinforcement rod is provided on the upper part of the diagonal brace to connect the steel column; a truss plate is provided between the upper and lower truss horizontal rods, and the truss plate includes a truss diagonal rod and a truss vertical rod, and the truss plate is arranged with a truss parallel joint and a truss scissors brace in the longitudinal bridge direction.

2. The large cantilever prestressed cap beam truss main beam support according to claim 1, characterized in that: The steel columns are symmetrically mounted on the caps around the piers. A bottom plate is provided at the bottom of the steel columns, and the bottom plate is connected to the embedded anchor bolts in the cap.

3. The large cantilever prestressed cap beam truss main beam support according to claim 1, characterized in that: The transverse connecting rods and the inner supports are fixedly connected to form a transverse bridge connection system between the steel columns, wherein the ends of the transverse connecting rods are respectively welded and fixed to the steel columns on both sides, and the transverse bridge connection system composed of the transverse connecting rods and the inner supports is arranged in three rows between the steel columns.

4. The large cantilever prestressed cap beam truss main beam support according to claim 1, characterized in that: The column parallel connections are provided in four paths in total and are installed between the steel columns in the longitudinal bridge direction.

5. The large cantilever prestressed cap beam truss main beam support according to claim 1, characterized in that: The unloading block is fixedly installed on the top of the diagonal support and the steel column, and is used for adjusting the stroke when the upper bracket is installed and removed.

6. The large cantilever prestressed cap beam truss main beam support according to claim 1, characterized in that: The truss parallel joints and truss scissor braces are fixedly installed between the truss pieces in the longitudinal direction of the bridge.

7. The large cantilever prestressed cap beam truss main beam support according to claim 1, characterized in that: The bolt interfaces are symmetrically arranged on the upper truss horizontal bars and the lower truss horizontal bars, and the upper truss horizontal bars and the lower truss horizontal bars are fixedly connected at the bolt interfaces using tension bolts.

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