Construction method of station roof net rack supporting structure

Abstract

The invention discloses a construction method of a station roof net rack supporting structure. The grid structure is a space structure formed by connecting a plurality of rod pieces through nodes according to a certain grid form. The method comprises the following steps: constructing elevated station piers; mounting a net rack corbel connecting structure; mounting a station roof grid structure; welding work of other bolt balls and the linkage system is completed; the hydraulic jacking equipment is unloaded, and the jacking frame and the hydraulic jacking equipment are dismounted; and the step one to the step five are repeated, and installation of all station roof grid structures is completed. The roof grid structure is broken up into parts, the number of times of single hoisting is effectively reduced, and the requirement for construction equipment is greatly lowered; the rod piece is small in stress in the construction process, and the size of the rod piece does not need to be increased due to construction.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a construction method of a station roof grid support structure. Background Art

[0002] The grid structure is a spatial structure formed by connecting multiple rods through nodes in a certain grid form. It has the advantages of small spatial force, light weight, high rigidity, and good seismic performance. It has been widely used in station roof structures. According to the support conditions, the grid structure can be divided into peripheral support, four-point support, multi-point support, three-side support, opposite-side support, and mixed support. Usually, no matter what kind of support form, a separate column needs to be set at the support point. The separate column needs to occupy a certain space area, the height is the distance from the support point to the ground, and a separate foundation needs to be set, which leads to many unfavorable factors such as reduced space utilization, increased engineering volume, and increased engineering cost. Summary of the invention

[0003] In order to make up for the shortcomings of the prior art, the present invention provides a construction method for a station roof grid support structure with high construction efficiency. The constructed support structure is arranged on the pier corbels, which can greatly reduce the number of independent grid columns and improve the space utilization rate of the station building.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A construction method for a station roof grid support structure comprises the following steps:

[0006] Step 1: Construction of elevated station piers;

[0007] Step 2: Install the grid bracket connection structure;

[0008] Step 3: Install the station roof grid structure;

[0009] Step 4: Complete the welding work of the remaining bolt balls and the connection system;

[0010] Step 5: Use hydraulic jacking equipment to unload and remove the jacking frame and equipment;

[0011] Repeat steps 1 to 5 to complete the installation of the entire station roof grid structure.

[0012] Further, the step 1 is specifically as follows:

[0013] Install the bottom formwork, connect the formwork components, install the supporting structure, tie the steel bars, pour concrete, lift the climbing formwork, and repeat the construction until the pier construction is completed; when tying the steel bars, tie the corbel steel bars and the pier body steel bars together, and embed the spherical steel support embedded steel plates. The spherical steel support embedded steel plates need to be welded to the support embedded steel plates, perforated and plug-welded, and then embedded in the top of the corbel to form a whole after concrete pouring.

[0014] Further, the step 2 is specifically as follows:

[0015] Install the finished spherical steel bearing on the pier corbel, weld the lower base plate of the spherical steel bearing and the embedded steel plate of the spherical steel bearing into one; weld the top surface of the upper base plate of the spherical steel bearing to the circular steel plate, and weld the upper surface of the circular steel plate to the stiffening steel plate and steel rod to connect the grid bolt ball.

[0016] Further, the step three is specifically as follows:

[0017] The station roof grid structure components are transported to the bottom of the bridge and assembled on the ground. After the assembly is completed, the whole is lifted to the designed position, and a tower crane is used to install the upper and lower chords between the lifting grid and the connecting structure at high altitude, so that the grid bolt ball falls into the supporting space formed by the stiffening steel plate and steel rod, and the bolt ball is welded to the stiffening steel plate and steel rod as one.

[0018] Further, the support structure constructed according to the construction method includes an elevated station pier, and the elevated station pier is provided with a corbel;

[0019] The station roof grid is connected to the brackets through the grid bracket connection structure;

[0020] The grid bracket connection structure includes a bolt ball, a stiffening steel plate, a steel rod, a round steel plate, a spherical steel support embedded steel plate, a support embedded steel plate welded steel bar, a spherical steel support lower seat plate, and a spherical steel support upper seat plate;

[0021] A plurality of stiffening steel plates are annularly fixed to the outer periphery of the steel rod, the bottom of the steel rod and the stiffening steel plate are welded to the circular steel plate, and the top of the stiffening steel plate is connected to the bolt ball;

[0022] The bottom of the circular steel plate is welded to the upper seat plate of the spherical steel support, the bottom of the lower seat plate of the spherical steel support is welded to the top of the embedded steel plate of the spherical steel support, and the embedded steel plate of the spherical steel support is arranged on the top of the bracket;

[0023] The spherical steel support embedded steel plate is welded to the support embedded steel plate by welding steel bars.

[0024] Furthermore, the support embedded steel plate welded steel bars are vertically arranged inside the corbel.

[0025] Furthermore, the elevated station piers are reinforced concrete structures.

[0026] Furthermore, the stiffening steel plates are evenly arranged around the periphery of the steel rod.

[0027] Furthermore, the station roof grid includes a grid upper chord node and a grid lower chord node.

[0028] Beneficial effects of the present invention:

[0029] 1) The novel station roof grid support structure provided by the present invention has a simple structure. When applied to a station building under a bridge, the support structure arranged on the pier bracket can significantly improve the space utilization rate of the station building;

[0030] 2) The novel station roof grid support structure provided by the present invention can greatly reduce the number of independent grid columns, thereby reducing the amount of engineering work, saving engineering costs, and generating better economic benefits;

[0031] 3) The invention provides a novel construction method for a station roof grid support structure, which clarifies the construction sequence of pier corbels, connecting systems and roof grids, breaks the roof grid structure into smaller parts, effectively reduces the number of single hoisting operations, and greatly reduces the requirements for construction equipment; during the construction process, the rods are subjected to less force, and there is no need to increase the size of the rods due to construction; during construction, multiple working surfaces can be deployed simultaneously, thereby speeding up the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is the elevation drawing of the station roof grid support;

[0033] Figure 2 This is the plan view of the station roof grid support connection system;

[0034] Figure 3 This is the plan view of the station roof grid support;

[0035] Figure 4 This is the detailed drawing of the embedded parts of the spherical steel bearings supporting the station roof grid;

[0036] Figure 5 This is a schematic diagram of the upper chord node of the station roof grid;

[0037] Figure 6 This is a schematic diagram of the lower chord node of the station roof grid;

[0038] Figure 7 This is the plan view of the station roof grid structure;

[0039] Figure 8 This is the elevation drawing of the station roof grid structure;

[0040] In the figure, 1. bridge pier; 2. corbel; 3. embedded steel plate of spherical steel bearing; 4. welded steel bars of embedded steel plate of bearing; 5. lower seat plate of spherical steel bearing; 6. upper seat plate of spherical steel bearing; 7. round steel plate; 8. stiffening steel plate; 9. bolt ball; 10. steel pipe one; 11. steel rod; 12. sleeve; 13. sealing plate; 14 high-strength bolt; 15. pin; 16. support tube; 17. support plate; 18. steel pipe two. DETAILED DESCRIPTION

[0041] The present invention is described in detail below in conjunction with specific implementation modes.

[0042] The construction method of the station roof grid support structure of the present invention comprises the following steps:

[0043] Step 1: Construction of elevated station pier 1, specifically:

[0044] Install the bottom formwork, connect the formwork components, install the supporting structure, tie the steel bars, pour concrete, lift the climbing formwork, and repeat the construction until the pier construction is completed; when tying the steel bars, tie the corbel 2 steel bars and the pier body steel bars as a whole, and embed the spherical steel support embedded steel plate 3, the spherical steel support embedded steel plate 3 needs to be welded with the support embedded steel plate steel bar 4 through holes and plug welded, and then embedded in the top of the corbel 2 to form a whole after concrete pouring.

[0045] Step 2: Install the grid bracket connection structure, specifically:

[0046] The finished spherical steel bearing is installed on the pier corbel 2, and the lower seat plate 5 of the spherical steel bearing is welded to the embedded steel plate 3 of the spherical steel bearing as a whole; the upper top surface of the upper seat plate 6 of the spherical steel bearing is welded to the circular steel plate 7 as a whole, and the upper surface of the circular steel plate 7 is welded to the stiffening steel plate 8 and the steel rod 11 as a whole to connect the grid bolt ball 9.

[0047] Step 3: Install the station roof grid structure, specifically:

[0048] The station roof grid structure components are transported to the bottom of the bridge and assembled on the ground. After the assembly is completed, the whole is lifted to the designed position, and a tower crane is used to install the upper and lower chord members between the lifting grid and the connecting structure at high altitude, so that the grid bolt ball 9 falls into the supporting space formed by the stiffening steel plate 8 and the steel rod 11, and the bolt ball 9 is welded to the stiffening steel plate 8 and the steel rod 11 as a whole.

[0049] Step 4: Complete the welding work of the remaining bolt balls and the connection system;

[0050] Step 5: Use hydraulic jacking equipment to unload and remove the jacking frame and equipment;

[0051] Repeat steps 1 to 5 to complete the installation of the entire station roof grid structure.

[0052] The supporting structure constructed according to the construction method of the present invention comprises an elevated station pier 1, which is a reinforced concrete structure, and a bracket 2 is arranged on the elevated station pier 1; the station roof grid is connected to the bracket 2 through a grid bracket connection structure, such as Figure 1 , 3 , 7, 8;

[0053] like Figure 2 , 4 As shown, the grid bracket connection structure includes a bolt ball 9, a stiffening steel plate 8, a steel rod 11, a circular steel plate 7, a spherical steel support embedded steel plate 3, a support embedded steel plate welded steel bar 4, a spherical steel support lower seat plate 5, and a spherical steel support upper seat plate 6; a plurality of stiffening steel plates 8 are evenly fixed in an annular direction on the outer periphery of the steel rod 11, the bottom of the steel rod 11 and the stiffening steel plate 8 are welded to the circular steel plate 7, and the top of the stiffening steel plate 8 is connected to the bolt ball 9;

[0054] The bottom of the circular steel plate 7 is welded to the upper seat plate 6 of the spherical steel support, the bottom of the lower seat plate 5 of the spherical steel support is welded to the top of the embedded steel plate 3 of the spherical steel support, and the embedded steel plate 3 of the spherical steel support is arranged on the top of the bracket 2;

[0055] The spherical steel support embedded steel plate 3 is welded to the support embedded steel plate welded steel bar 4, and the support embedded steel plate welded steel bar 4 is vertically arranged inside the corbel 2.

[0056] The station roof grid includes grid upper chord nodes and grid lower chord nodes, such as Figure 5 , 6 As shown;

[0057] The upper chord node of the grid includes a steel pipe 10, a steel pipe 2 18, a sealing plate 13, a sleeve 12, a high-strength bolt 14, a pin 15, a support tube 16, and a support plate 17; the sealing plate 13 is located at the end of the steel pipe, the high-strength bolt 14 is connected to the steel pipe through the pin 15, and then connected to the bolt ball 9; the sleeve 12 is wrapped around the outside of the high-strength bolt 14, and the support plate 17 and the support tube 16 are connected as a whole and then connected to the bolt ball 9;

[0058] The lower chord node of the truss includes steel pipe 10, steel pipe 2 18, a sealing plate 13, a sleeve 12, a high-strength bolt 14, and a pin 15; the sealing plate 13 is located at the end of the steel pipe, the high-strength bolt 14 is connected to the steel pipe through the pin 15, and then connected to the bolt ball 9; the sleeve 12 is wrapped around the outside of the high-strength bolt 14.

[0059] The station roof grid support structure construction method of the present invention clarifies the construction sequence of the pier bracket, the connecting system and the roof grid, breaks the roof grid structure into parts, effectively reduces the number of single hoisting times, and greatly reduces the requirements for construction equipment; during the construction process, the rods are subjected to small forces, and there is no need to increase the rod size due to construction; during construction, multiple working surfaces can be launched simultaneously, thereby accelerating the construction progress; the support structure is simple in construction, and when applied to the station building under the bridge, the support structure arranged on the pier bracket can significantly improve the space utilization rate of the station building; the number of independent grid columns can be greatly reduced, thereby reducing the amount of work and saving the project cost.

[0060] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The content of the present invention is not limited to the embodiments listed, and any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the description of the present invention are covered by the claims of the present invention.

Claims

1. A construction method for a station roof grid support structure, characterized in that: The following steps are involved: Step 1: Construction of elevated station piers (1); Step 2: Install the grid bracket connection structure; Step 3: Install the station roof grid structure; Step 4: Complete the welding work of the remaining bolt balls and the connection system; Step 5: Use hydraulic jacking equipment to unload and remove the jacking frame and equipment; Repeat steps 1 to 5 to complete the installation of the entire station roof grid structure.

2. The construction method of a station roof grid support structure according to claim 1 is characterized in that: The step 1 is specifically as follows: Install the bottom formwork, connect the formwork components, install the supporting structure, tie the steel bars, pour concrete, and lift the climbing formwork. Repeat the construction until the pier construction is completed. When tying the steel bars, tie the steel bars of the corbel (2) and the steel bars of the pier body together, and embed the spherical steel support embedded steel plate (3). The spherical steel support embedded steel plate (3) needs to be welded with the support embedded steel plate steel bar (4) through holes and plug welding, and then embedded in the top of the corbel (2). After the concrete is poured, it forms a whole.

3. The construction method of a station roof grid support structure according to claim 2 is characterized in that: The step 2 is specifically as follows: A finished spherical steel bearing is installed on the pier bracket (2), and the lower seat plate (5) of the spherical steel bearing is welded to the embedded steel plate (3) of the spherical steel bearing as a whole; the upper top surface of the upper seat plate (6) of the spherical steel bearing is welded to the circular steel plate (7) as a whole, and the upper surface of the circular steel plate (7) is welded to the reinforcing steel plate (8) and the steel rod (11) as a whole, so as to connect the grid bolt ball (9).

4. The construction method of a station roof grid support structure according to claim 3 is characterized in that: The step three is specifically as follows: The station roof grid structure components are transported to the bottom of the bridge and assembled on the ground. After the assembly is completed, the entire structure is lifted to the designed position. A tower crane is used to install the upper and lower chord members between the lifting grid and the connecting structure at high altitude, so that the grid bolt ball (9) falls into the supporting space formed by the stiffening steel plate (8) and the steel rod (11), and the bolt ball (9) is welded to the stiffening steel plate (8) and the steel rod (11) as a whole.

5. The construction method of a station roof grid support structure according to claim 4 is characterized in that: The supporting structure constructed according to the construction method comprises an elevated station pier (1), and a bracket (2) is arranged on the elevated station pier (1); The station roof grid is connected to the bracket (2) via a grid bracket connection structure; The grid bracket connection structure comprises a bolt ball (9), a stiffening steel plate (8), a steel rod (11), a circular steel plate (7), a spherical steel support embedded steel plate (3), a support embedded steel plate welded steel bar (4), a spherical steel support lower seat plate (5), and a spherical steel support upper seat plate (6); A plurality of stiffening steel plates (8) are annularly fixed to the outer periphery of the steel rod (11); the bottoms of the steel rod (11) and the stiffening steel plates (8) are welded to the circular steel plates (7); and the tops of the stiffening steel plates (8) are connected to the bolt balls (9); The bottom of the circular steel plate (7) is welded to the upper seat plate (6) of the spherical steel support, the bottom of the lower seat plate (5) of the spherical steel support is welded to the top of the embedded steel plate (3) of the spherical steel support, and the embedded steel plate (3) of the spherical steel support is arranged on the top of the bracket (2); The spherical steel support embedded steel plate (3) is welded to the support embedded steel plate welded steel bar (4).

6. The construction method of a station roof grid support structure according to claim 5 is characterized in that: The support pre-embedded steel plate welded steel bars (4) are vertically arranged inside the corbel (2).

7. The construction method of a station roof grid support structure according to claim 6 is characterized in that: The elevated station pier (1) is a reinforced concrete structure.

8. The construction method of a station roof grid support structure according to claim 7 is characterized in that: The stiffening steel plates (8) are evenly arranged in the circumferential direction on the outer periphery of the steel rod (11).

9. The construction method of a station roof grid support structure according to claim 8, characterized in that: The station roof grid includes grid upper chord nodes and grid lower chord nodes.

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