A construction method of a fan-shaped roof steel structure and a fan-shaped roof steel structure

Abstract

The invention relates to a construction method of a fan-shaped roof steel structure and the fan-shaped roof steel structure, comprising the following steps: installing the middle section of the lowest layer of steel beams on a middle support column, setting up a temporary bracket between the middle support column and the side column of the lowest layer of steel beams, hoisting the two end sections of the lowest layer of steel beams to the temporary bracket, and fixing the two end sections of the lowest layer of steel beams to the corresponding middle section and side column respectively; using the lowest layer of steel beams as temporary support, stacking and assembling each layer of steel beams in sequence from bottom to top, wherein the middle section of the steel beams is installed on the middle support column, and the inner end portions of the two end sections of the steel beams are fixed to the corresponding middle section; unfolding each layer of steel beams to form a folding fan-shaped structure, and fixing each layer of steel beams to the corresponding side column. The construction method of the invention reduces construction costs and shortens construction period.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a construction method of a fan-shaped roof steel structure and a fan-shaped roof steel structure. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] At present, there are buildings whose roofs are designed as unfolded "folding fan" structures. Figure 1 As shown, the roof steel structure is an overlong and complex steel structure. Many technical difficulties are encountered in the hoisting construction of the roof steel structure: First, the steel beam 1 is overlong (generally more than 15 meters). After being processed and manufactured in the prefabrication factory, it needs to be disassembled into several smaller sections (usually less than 12 meters in length). After being transported to the site, it is hoisted onto a temporary bracket and welded to form an overall structure. The temporary bracket is then removed to form the final structure. The commonly used high-altitude bulk process requires the arrangement of multiple temporary brackets to complete the assembly of all steel beams due to the different unfolding positions of multiple steel beams 1. The cost of processing temporary brackets is huge. In addition, the steel beams 1 at different positions need to be positioned and corrected when assembled, and the workload of on-site laying out and positioning is also very large, which increases the construction period. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a construction method for a fan-shaped roof steel structure and a fan-shaped roof steel structure, which have the advantages of fast construction speed and less temporary supports.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a construction method of a fan-shaped roof steel structure, comprising the following steps:

[0007] Install the middle section of the bottom steel beam on the middle support column, set up a temporary bracket between the middle support column and the side column of the bottom steel beam, hoist the two end sections of the bottom steel beam to the temporary bracket, and fix the two end sections of the bottom steel beam to the corresponding middle section and side column respectively;

[0008] Using the bottom steel beam as temporary support, stack and assemble the steel beams of each layer in sequence from bottom to top, wherein the middle section of the steel beam is installed on the middle support column, and the inner ends of the two end sections of the steel beam are fixed to the corresponding middle section;

[0009] The steel beams of each layer are unfolded to form a fan-shaped structure, and the steel beams of each layer are fixed to the corresponding side columns.

[0010] Optionally, the method for unfolding the steel beams of each layer is: the top layer steel beam is pulled multiple times to set the angle, and after each pulling of the top layer steel beam is completed, a connecting beam is installed between the top layer steel beam that is not pulled and the steel beam adjacent to it in front along the pulling direction, and then the top layer steel beam is pulled again until the top layer steel beam is pulled to the position of its corresponding side column, and then all the layer steel beams are fixedly connected with the corresponding side columns, and the unfolding construction of each layer steel beam is completed;

[0011] The set angle is the interval angle between two adjacent side columns.

[0012] Optionally, before pulling the topmost steel beam, a pulling device is installed along the pulling direction at the next side column of the side column currently corresponding to the topmost steel beam, and the topmost steel beam is pulled by the pulling device.

[0013] Optionally, the traction device adopts a hand winch or a fall chain.

[0014] Optionally, the intermediate support column is provided with a plurality of annular grooves arranged vertically, and the intermediate support column is rotatably connected to the middle section of the corresponding steel beam through the annular grooves.

[0015] Optionally, the intermediate support column includes an inverted V-shaped structure, the top tip of the inverted V-shaped structure is connected to the bottom end of the vertical column, and the outer cylindrical surface of the vertical column is vertically provided with a plurality of annular grooves.

[0016] Optionally, the middle section of the steel beam is formed by fixing a first middle portion and a second middle portion, and the first middle portion and the second middle portion are provided with corresponding semicircular arc portions. After the first middle portion and the second middle portion are fixed, the two semicircular arc portions form a circular ring structure that matches the middle support column, and the circular ring structure is sleeved on the outer periphery of the middle support column.

[0017] Optionally, the side column includes an inverted V-shaped structure, the top tip of the inverted V-shaped structure is fixed to the bottom end of the vertical column, and the top end of the vertical column is used to be fixed to the corresponding end of the steel beam.

[0018] Optionally, after the expansion construction of each layer of steel beams is completed, the temporary support is removed.

[0019] In a second aspect, an embodiment of the present invention provides a fan-shaped roof steel structure, which is constructed using the construction method of the fan-shaped roof steel structure described in the first aspect.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The construction method of the fan-shaped roof steel structure of the present invention uses the bottom steel beam as a temporary support when assembling the steel beams of each layer, and uses the bottom steel beam for positioning and correction. During construction, it is only necessary to set temporary supports and perform positioning and correction when assembling the middle section and the two end sections of the bottom steel beam, which greatly reduces the number of temporary supports used, and also reduces the workload of on-site laying out and positioning, thereby reducing construction costs and speeding up construction progress.

[0022] 2. The construction method of the fan-shaped roof steel structure of the present invention is to construct the connecting beam between two adjacent steel beams, and then use the traction equipment to pull the top steel beam. The connecting beam is used as the roof steel structure and also plays a traction and guiding role, thus playing the multiple roles of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 This is a schematic diagram of the steel structure of the folding fan-shaped roof;

[0025] Figure 2 is a flow chart of the construction method of embodiment 1 of the present invention;

[0026] Figure 3 is a schematic diagram of step 1 of embodiment 1 of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the intermediate support column in Example 1 of the present invention;

[0028] Figure 5 is a schematic diagram of step 2 of embodiment 1 of the present invention;

[0029] Figure 6 It is a schematic diagram of the installation process of the middle section of the steel beam on the middle support column in Example 1 of the present invention;

[0030] Figure 7 is a schematic diagram of step 3 of embodiment 1 of the present invention;

[0031] Figure 8 is a schematic diagram of step 4 of embodiment 1 of the present invention;

[0032] Among them: 1. Steel beam, 2. Intermediate support column, 3. Side column, 4. Temporary support, 5. Tie beam;

[0033] 1-1. middle section, 1-1-1. first middle section, 1-1-2. second middle section, 1-2. both end sections;

[0034] 2-1. Annular groove. DETAILED DESCRIPTION

[0035] Example 1

[0036] The present embodiment provides a construction method for a fan-shaped roof steel structure, wherein the steel structure includes a middle support column, multiple side columns and multiple steel beams, wherein the steel beam includes a middle section and two end sections located at both ends of the middle section, wherein the middle section and the two end sections together constitute a steel beam, and both ends of each steel beam are fixedly connected to the top of the side column.

[0037] like Figure 2 As shown, the construction method comprises the following specific steps:

[0038] Step 1: Figure 3 As shown, the middle support column 2 and the side columns 3 corresponding to the two ends of the plurality of steel beams 1 are pre-constructed, the side columns 3 are evenly spaced along the annular direction, and the circumference where the middle support column 2 and the side columns 3 are located are coaxial.

[0039] In this embodiment, Figure 4 As shown, the middle support column 2 includes an inverted V-shaped structure, which is composed of two pillar tops cross-connected, the tip top of the inverted V-shaped structure is integrally connected to the bottom end of the vertical column, and the vertical column surface is provided with multiple annular grooves 2-1 along its axial direction, i.e., the vertical direction, for installing the middle section of the steel beam.

[0040] The intermediate support column 2 has a complex structure and is processed by a factory casting method and is transported to the construction site when in use.

[0041] The side column 3 also includes an inverted V-shaped structure, which is composed of two pillar tops cross-connected. The tip top of the inverted V-shaped structure is integrally connected to the bottom end of the vertical column, and the top surface of the vertical column is used for welding and fixing with the bottom surface of the end of the steel beam 1.

[0042] In this embodiment, the side columns 3 are installed at equal intervals along a ring, and the top surface elevation of the side columns 3 is consistent with the bottom surface elevation of the steel beam 1 of the corresponding layer.

[0043] Step 2: If Figure 5 As shown, a temporary bracket 4 is constructed in the area between the middle support column 2 and the two side columns 1 corresponding to the side span of the steel structure, and the middle section 1-1 of the lowest steel beam 1 is inserted into the lowest annular groove of the middle support column 2.

[0044] like Figure 6As shown, the middle section 1-1 of the steel beam 1 is welded and assembled by the first middle section 1-1-1 and the second middle section 1-1-2. The first middle section 1-1-1 and the second middle section 1-1-2 are both straight beams, and their ends are half of the cross-section of the two end sections 1-2 of the steel beam. After assembly, the end of the middle section 1-1 matches the cross-section of the two end sections 1-2 of the steel beam. The first middle section 1-1-1 and the second middle section 1-1-2 are provided with a semicircular arc portion in the middle. After the first middle section 1-1-1 and the second middle section 1-1-2 are assembled, the two semicircular arc portions form a circular ring structure that matches the annular groove 2-1. The inner diameter of the circular ring structure matches the diameter of the circumference of the bottom groove surface of the annular groove 2-1. The circular ring structure is sleeved on the outer periphery of the intermediate support column 2 through the lowest annular groove 2-1, and the middle section is rotatably connected to the intermediate support column, and the middle section can rotate freely around the axis of the intermediate support column.

[0045] When installing the middle section, the semicircular arc parts of the first middle part 1-1-1 and the second middle part 1-1-2 are respectively matched with the annular groove 2-1 of the bottom layer of the middle support column 2. After the first middle part 1-1-1 and the second middle part 1-1-2 are assembled, the contact edges of the first middle part 1-1-1 and the second middle part 1-1-2 are welded and fixed.

[0046] The two end sections 1-2 of the bottom steel beam are hoisted onto two temporary supports 4 respectively, the two end sections 1-2 are positioned and corrected, and then one end of the two end sections 1-2 is welded and fixed to the middle section 1-1, and the bottom surface of the other end is welded and fixed to the corresponding side column 3.

[0047] The positioning and correction methods can adopt existing construction methods and will not be described in detail here.

[0048] Step 3: If Figure 7 As shown, with the bottom steel beam 1 as a temporary support and positioning reference, each layer of steel beams 1 is assembled in sequence from bottom to top, wherein the middle section 1-1 of the steel beam is sleeved on the outer periphery of the corresponding annular groove 2-1, and the inner end portions of both end sections of the steel beam 1 are welded and fixed to the corresponding middle section 1-1.

[0049] The method for installing the middle section on the middle support column can be the same as the method for installing the middle section on the middle support column in step 2, which will not be repeated here.

[0050] After the construction is completed, multiple steel beams 1 are stacked with the bottom steel beam 1 as a temporary support.

[0051] Step 4: Figure 8 As shown, the multi-layer steel beam 1 is pulled and unfolded to form a fan-shaped structure. After the steel beam 1 is unfolded, the end of the steel beam 1 is welded and fixed to the corresponding side column 3.

[0052] The method for unfolding the steel beam 1 is as follows: the top steel beam 1 is towed multiple times by a traction device to set an angle, and after each traction of the top steel beam 1 is completed, a connecting beam 5 is installed between the top steel beam 1 that is not towed and the steel beam 1 adjacent to it in front along the traction direction, and then the top steel beam 1 is towed again until the top steel beam 1 is towed to the position of the corresponding side column 3, and then all layers of steel beams 1 are fixedly connected to the corresponding side columns 3, and the unfolding construction of each layer of steel beams 1 is completed;

[0053] The set angle is the interval angle between two adjacent side columns 3 .

[0054] Specifically: from top to bottom, the multi-layer steel beams are respectively the first layer steel beams, the second layer steel beams...the Nth layer steel beams, the first layer steel beams are the topmost layer steel beams, the Nth layer steel beams are the bottommost layer steel beams, the side columns corresponding to the nth layer steel beams are the nth side columns, wherein n=1, 2...N, and along the traction direction, a traction device is arranged on the adjacent N-1th side column in front of the Nth side column corresponding to the bottommost layer steel beam 1, the traction device adopts a hand winch or a fall chain, and the traction device is used to pull the first layer steel beams, so that the first layer steel beams are rotated to a set angle, and their ends correspond to the N-1th side columns, and then a connecting beam is welded between the first layer steel beams and the second layer steel beams.

[0055] Then, a traction device is installed on the N-2 side column in front of the N-1 side column, and the first layer of steel beams is pulled by the traction device until the end of the second layer of steel beams reaches the corresponding position of the N-1 side column, and then a connecting beam 5 is welded between the second layer of steel beams and the third layer of steel beams.

[0056] The same method is used to pull the first layer of steel beams multiple times in sequence until the end of the first layer of steel beams corresponds to the position of the first side column. At this time, each steel beam corresponds to the corresponding side column.

[0057] The bottom surface of the end of the steel beam 1 is welded and fixed to the top surface of the corresponding side column 3.

[0058] Step 5: After the construction of the multi-layer steel beam 1 is completed, the temporary support 4 is removed.

[0059] After the steel structure construction is completed, the roof surface layer can be installed until the roof construction is completed. The installation of the roof surface layer can adopt existing technology and will not be described in detail here.

[0060] In the construction method of this embodiment, when assembling the steel beams 1 of each layer, the steel beams 1 of the bottom layer are used as temporary supports, and the steel beams 1 of the bottom layer are used for positioning and correction. During construction, it is only necessary to set temporary brackets 4 and perform positioning and correction when assembling the middle section 1-1 and the two end sections 1-2 of the steel beams 1 of the bottom layer. This greatly reduces the number of temporary brackets used, and also reduces the workload of on-site layout, positioning, etc., reduces construction costs, and speeds up construction progress. Moreover, the connecting beam is used as a roof steel structure, and also plays a traction and guiding role, playing the multiple roles of the component.

[0061] Example 2

[0062] The present embodiment provides a fan-shaped roof steel structure, which is constructed by the method described in Example 1, and includes a plurality of steel beams 1 distributed in a fan shape and crossing at the middle position, the middle part of the steel beam 1 is connected to the middle support column 2, and the two ends of the steel beam 1 are welded and fixed to the top surfaces of the corresponding side columns 3. The steel beam 1 includes a middle section 1-1 which is sleeved in the corresponding annular groove 2-1 of the middle support column 2, and two end sections 1-2 of the steel beam 1 are arranged between the two ends of the middle section 1-1 and the side columns 3, one end of the two end sections 1-2 is welded and fixed to the middle section 1-1, and the other end is welded and fixed to the top surface of the side column 3.

[0063] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A construction method for a fan-shaped roof steel structure, characterized in that: The following steps are involved: Install the middle section of the bottom steel beam on the middle support column, set up a temporary bracket between the middle support column and the side column of the bottom steel beam, hoist the two end sections of the bottom steel beam to the temporary bracket, and fix the two end sections of the bottom steel beam to the corresponding middle section and side column respectively; Using the bottom steel beam as temporary support, stack and assemble the steel beams of each layer in sequence from bottom to top, wherein the middle section of the steel beam is installed on the middle support column, and the inner ends of the two end sections of the steel beam are fixed to the corresponding middle section; The steel beams of each layer are unfolded to form a fan-shaped structure, and the steel beams of each layer are fixed to the corresponding side columns.

2. The construction method of a fan-shaped roof steel structure according to claim 1, characterized in that: The method for unfolding the steel beams of each layer is as follows: the top steel beam is pulled multiple times to set the angle. After each pulling of the top steel beam is completed, a connecting beam is installed between the top steel beam that has not been pulled and the adjacent steel beam in front of it along the pulling direction, and then the top steel beam is pulled again until the top steel beam is pulled to the position of its corresponding side column. Then, all the steel beams of each layer are fixedly connected with the corresponding side columns, and the unfolding construction of the steel beams of each layer is completed. The set angle is the interval angle between two adjacent side columns.

3. The construction method of a fan-shaped roof steel structure according to claim 1, characterized in that: Before pulling the top steel beam, a pulling device is installed on the next side column of the side column currently corresponding to the top steel beam along the pulling direction, and the top steel beam is pulled by the pulling device.

4. The construction method of a fan-shaped roof steel structure according to claim 3, characterized in that: The traction device adopts a hand chain hoist or a fall chain.

5. The construction method of a fan-shaped roof steel structure according to claim 1, characterized in that: The middle support column is provided with a plurality of annular grooves arranged vertically, and the middle support column is rotatably connected to the middle section of the corresponding steel beam through the annular grooves.

6. The construction method of a fan-shaped roof steel structure according to claim 5, characterized in that: The middle support column comprises an inverted V-shaped structure, the top tip of the inverted V-shaped structure is connected to the bottom end of the vertical column, and the outer cylindrical surface of the vertical column is vertically provided with a plurality of annular grooves.

7. The construction method of a fan-shaped roof steel structure according to claim 1, characterized in that: The middle section of the steel beam is formed by fixing a first middle part and a second middle part, and the first middle part and the second middle part are provided with corresponding semicircular arc parts. After the first middle part and the second middle part are fixed, the two semicircular arc parts form a circular ring structure matching the middle support column, and the circular ring structure is sleeved on the outer periphery of the middle support column.

8. The construction method of a fan-shaped roof steel structure according to claim 1, characterized in that: The side column comprises an inverted V-shaped structure, the top tip of the inverted V-shaped structure is fixed to the bottom end of the vertical column, and the top end of the vertical column is used to be fixed to the corresponding end of the steel beam.

9. The construction method of a fan-shaped roof steel structure according to claim 1, characterized in that: After the construction of each layer of steel beams is completed, the temporary supports will be removed.

10. A fan-shaped roof steel structure, characterized in that: The fan-shaped roof steel structure is constructed by the construction method of any one of claims 1 to 9.

Images