Support-free construction method for large-span steel structure

Abstract

The invention discloses a support-free construction method for a large-span steel structure, which belongs to the technical field of building construction, and comprises the following steps: S1, determining the position and reference point of a steel structure upright post, and performing accurate measurement by using a measuring tool; s2, foundation construction is conducted according to the engineering design drawing; s3, steel structure cross beams and connecting pieces prefabricated in a factory are transported to a construction site, and stand columns are installed through hoisting equipment; s4, the cross beam is installed in a segmented mode according to the span, and pulling force is provided through a traction mechanism after each segment is installed; and S5, the steel structure cross beams and the connecting pieces are welded and connected, and the stability and firmness of the structure are ensured. According to the method, the cross beams are installed in a segmented splicing mode, the ends of the cross beams are dragged through the steel wire ropes when each section is installed, a supporting frame does not need to be erected, the occupied space is small, meanwhile, economical efficiency is good, construction operation is easy, efficiency is high, operation steps of workers are simplified, and meanwhile manpower and material resources are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a support-free construction method for a large-span steel structure. Background Art

[0002] In the installation process of existing large-span steel structures, split installation or integral hoisting is generally used. Integral hoisting is suitable for large open areas and occasions suitable for mechanical operations, while split installation is suitable for various occasions, especially for some occasions where integral hoisting cannot be carried out. However, split installation also has certain defects, such as it requires the steel structure to be divided into multiple independent parts and then hoisted and installed at its work station, and most of them require temporary support frames.

[0003] However, since the temporary support frames used in the top structures of large-span buildings are generally tall and require many measures, the installation costs are greatly increased. Summary of the invention

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] The unsupported construction method of large-span steel structure includes:

[0006] S1. Determine the position and reference point of the steel structure columns and use measuring tools to perform precise measurements;

[0007] S2. Carry out foundation construction according to engineering design drawings;

[0008] S3, transport the prefabricated steel structure beams and connectors to the construction site, and install the columns using hoisting equipment;

[0009] S4. Install the beam in sections according to the span, and provide pulling force through the traction mechanism after each section is installed;

[0010] S5. Weld and connect the steel structure beams and connectors to ensure the stability and firmness of the structure.

[0011] Furthermore, in step S2, the foundation construction includes digging the foundation, pouring concrete and installing embedded parts.

[0012] Furthermore, in S3, the connection points between the columns and the beams are connected and fixed by plate connectors.

[0013] Further, in S3, each of the plate connecting parts includes an upper steel plate, a lower steel plate and a side steel plate, the upper steel plate and the lower steel plate are both long strips of angle steel, the upper steel plate is arranged at the angle between the column and the upper surface of the beam, the lower steel plate is arranged at the angle between the column and the inner surface of the beam, the upper steel plate and the lower steel plate are connected by bolts, the other side wall of the column away from the beam is provided with a side steel plate, and the side steel plate is connected to the upper steel plate and the lower steel plate by bolts.

[0014] Further, in S4, two adjacent sections of the crossbeam are connected via a connecting piece.

[0015] Furthermore, both end sections of the crossbeam are provided with a first through hole, and both ends of the connecting member are provided with a second through hole corresponding to the first through hole, and the first through hole and the second through hole are connected and fixed by bolts.

[0016] Furthermore, the traction mechanism comprises:

[0017] A pulley block, the pulley block is detachably mounted on the top end of the column;

[0018] A fixing seat, wherein the fixing seat is fixed on the ground;

[0019] A reel, the reel being rotatably disposed on the fixing seat;

[0020] A rotating shaft, both ends of which are rotatably connected to a fixing seat, and the reel is fixed on the rotating shaft;

[0021] A motor, wherein the motor is mounted on one side of the fixing seat, and a driving end of the motor is fixedly connected to the rotating shaft;

[0022] A steel wire rope, one end of which is connected to the reel, and the other end of which is fixed in a first through hole on a side of the cross beam away from the column.

[0023] Furthermore, in S4, the first section of the beam is connected to the first connecting piece and then to the column, and then the side of the beam away from the column is pulled by the traction mechanism to fix the first section of the beam, and then the second section of the beam is connected to the first section of the beam through the second connecting piece, and then the multiple steel wire ropes in the traction mechanism are sequentially placed in the first through hole of the second section of the beam to complete the installation and fixation of the second section of the beam, and then the installation of the remaining sections of the beam is completed in sequence, and finally the end of the last section of the beam is connected and fixed to the column on the other side through the plate connecting piece.

[0024] Beneficial effects:

[0025] The present invention installs the crossbeam by assembling the crossbeam in sections. The end of the crossbeam is pulled by a steel wire rope for each installation. There is no need to set up a support frame, which occupies less space and has good economy. The construction operation is simple and the construction efficiency is high, which simplifies the operation steps of the staff and saves manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the installation of the first section of the crossbeam of the present invention;

[0028] Figure 3 This is a schematic diagram of the installation of the second section of the crossbeam of the present invention;

[0029] Figure 4 This is a schematic diagram of the installation of the remaining cross beams of the present invention;

[0030] Figure 5 This is a schematic diagram of the final structure of the present invention.

[0031] Among them, 1. column; 2. first section of crossbeam; 3. second section of crossbeam; 4. connecting parts; 5. upper steel plate; 6. lower steel plate; 7. side steel plate; 8. fixed seat; 9. motor; 10. reel; 11. wire rope; 12. pulley block. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Example 1

[0036] refer to Figure 1-Figure 5 , large-span steel structure unsupported construction method, including:

[0037] S1. Determine the position and reference point of the steel structure column 1 and use measuring tools to perform precise measurements;

[0038] S2. Carry out foundation construction according to engineering design drawings;

[0039] S3, transport the prefabricated steel structure beams to the construction site, and install the columns 1 using hoisting equipment;

[0040] S4. Install the beam in sections according to the span, and provide pulling force through the traction mechanism after each section is installed;

[0041] S4. Weld and connect the steel structure beams and connectors 4 to ensure the stability and firmness of the structure.

[0042] The present invention installs the crossbeam by assembling the crossbeam in sections. The end of the crossbeam is pulled by a steel wire rope for each installation. There is no need to set up a support frame, which occupies less space and has good economy. The construction operation is simple and the construction efficiency is high, which simplifies the operation steps of the staff and saves manpower and material resources.

[0043] In this embodiment, the cross beams, the connecting members 4 and the plate connecting members are all prefabricated in a factory.

[0044] In this embodiment, in step S2, the foundation construction includes laying the foundation, pouring concrete and installing embedded parts.

[0045] In this embodiment, in S3, the connection between the column 1 and the beam is connected and fixed by a plate connector.

[0046] In this embodiment, in S3, each plate connecting member includes an upper steel plate 5, a lower steel plate 6 and a side steel plate 7. The upper steel plate 5 and the lower steel plate 6 are both long strips of angle steel. The upper steel plate 5 is arranged at the angle between the column 1 and the upper surface of the beam, and the lower steel plate 6 is arranged at the angle between the column 1 and the inner surface of the beam. The upper steel plate 5 and the lower steel plate 6 are connected by bolts. The other side wall of the column 1 away from the beam is provided with a side steel plate 7, and the side steel plate 7 is connected to the upper steel plate 5 and the lower steel plate 6 by bolts.

[0047] In this embodiment, in S4 , two adjacent sections of the crossbeam are connected via a connecting member 4 .

[0048] In this embodiment, both end sections of the crossbeam are provided with first through holes, and both ends of the connecting member 4 are provided with second through holes corresponding to the first through holes, and the first through holes are fixed to the second through holes by bolt connection.

[0049] In this embodiment, the traction mechanism includes:

[0050] A pulley block 12, the pulley block 12 is detachably mounted on the top of the column 1;

[0051] A fixed seat 8, wherein the fixed seat 8 is fixed on the ground;

[0052] A reel 10, which is rotatably disposed on a fixed seat 8;

[0053] A rotating shaft, both ends of which are rotatably connected to a fixing seat 8, and a reel 10 is fixed on the rotating shaft;

[0054] The motor 9 is mounted on one side of the fixing seat 8, and the driving end of the motor 9 is fixedly connected to the rotating shaft;

[0055] A steel wire rope 11 , one end of which is connected to the reel 10 , and the other end of which is fixed in a first through hole on a side of the cross beam away from the column 1 .

[0056] In this embodiment, the pulley block 12 includes two pulleys arranged in parallel.

[0057] During the specific implementation, in S4, the first section of the beam 2 is connected to the first connecting piece 4 and then to the column 1, and then the side of the beam away from the column 1 is pulled by the traction mechanism to fix the first section of the beam 2, and then the second section of the beam 3 is connected to the first section of the beam 2 through the second connecting piece 4, and then the multiple steel wire ropes 11 in the traction mechanism are sequentially placed in the first through holes of the second section of the beam 3 to complete the installation and fixation of the second section of the beam 3, and then the installation of the remaining sections of the beam is completed in sequence, and finally the end of the last section of the beam is connected and fixed to the column 1 on the other side through the plate connector to ensure the stability and firmness of the structure.

[0058] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A large-span steel structure unsupported construction method, characterized in that: include: S1. Determine the position and reference point of the steel structure columns and use measuring tools to perform precise measurements; S2. Carry out foundation construction according to engineering design drawings; S3, transport the prefabricated steel structure beams and connectors to the construction site, and install the columns using hoisting equipment; S4. Install the beam in sections according to the span, and provide pulling force through the traction mechanism after each section is installed; S5. Weld and connect the steel structure beams and connectors to ensure the stability and firmness of the structure.

2. The large-span steel structure unsupported construction method according to claim 1 is characterized in that: In step S2, the foundation construction includes digging the foundation, pouring concrete and installing embedded parts.

3. The large-span steel structure unsupported construction method according to claim 1 is characterized in that: In S3, the connection points between the columns and the beams are connected and fixed by plate connectors.

4. The large-span steel structure unsupported construction method according to claim 3 is characterized in that: In S3, each of the plate connecting parts includes an upper steel plate, a lower steel plate and a side steel plate, and the upper steel plate and the lower steel plate are both long strips of angle steel. The upper steel plate is arranged at the angle between the column and the upper surface of the beam, and the lower steel plate is arranged at the angle between the column and the inner surface of the beam. The upper steel plate and the lower steel plate are connected by bolts, and the other side wall of the column away from the beam is provided with a side steel plate, and the side steel plate is connected to the upper steel plate and the lower steel plate by bolts.

5. The large-span steel structure unsupported construction method according to claim 1 is characterized in that: In S4, two adjacent sections of the crossbeam are connected via a connecting piece.

6. The large-span steel structure unsupported construction method according to claim 5 is characterized in that: Both end sections of the crossbeam are provided with a first through hole, and both ends of the connecting member are provided with a second through hole corresponding to the first through hole, and the first through hole and the second through hole are connected and fixed by bolts.

7. The large-span steel structure unsupported construction method according to claim 6 is characterized in that: The traction mechanism comprises: A pulley block, the pulley block is detachably mounted on the top end of the column; A fixing seat, wherein the fixing seat is fixed on the ground; A reel, the reel being rotatably disposed on the fixing seat; A rotating shaft, both ends of which are rotatably connected to a fixing seat, and the reel is fixed on the rotating shaft; A motor, the motor is mounted on one side of the fixing seat, and a driving end of the motor is fixedly connected to the rotating shaft; A steel wire rope, one end of which is connected to the reel, and the other end of which is fixed in a first through hole on a side of the cross beam away from the column.

8. The large-span steel structure unsupported construction method according to claim 7 is characterized in that: In S4, the first section of the beam is connected to the first connecting piece and then to the column, and then the side of the beam away from the column is pulled by the traction mechanism to fix the first section of the beam, and then the second section of the beam is connected to the first section of the beam through the second connecting piece, and then the multiple steel wire ropes in the traction mechanism are sequentially placed in the first through hole of the second section of the beam to complete the installation and fixation of the second section of the beam, and then the installation of the remaining sections of the beam is completed in sequence, and finally the end of the last section of the beam is connected and fixed to the column on the other side through the plate connecting piece.

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