Construction method of high-rise steel structure building

Abstract

The invention provides a high-rise steel structure building construction method, and relates to the technical field of building construction.The high-rise steel structure building construction method comprises the following steps that construction preparation is conducted, specifically, steel columns, steel beams and formwork assemblies are manufactured in a factory in advance; the formwork assembly comprises a plurality of steel bar trusses and a bottom formwork plate installed at the bottoms of the steel bar trusses, and the steel columns, the steel beams, the formwork assembly and the connecting pieces are transported to a construction site; a ground plane section division step: dividing the construction site into a plurality of plane construction sections by taking the central axis as a symmetry axis; the method has the beneficial effects that up-and-down cross operation of different types of work does not exist, workers of different types of work do not affect each other, the working efficiency is high, construction safety, quality and progress can be guaranteed, construction operation is simpler, steel column and steel beam installation, difference adjustment and correction are convenient, steel column core filling is converted into non-key work from key work, the construction period is not occupied, consumed time is short, and the construction cost is low. And the construction cost is lower.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a high-rise steel structure building construction method. Background Art

[0002] With the gradual development of the transformation and upgrading of the construction industry, the development of high-rise prefabricated steel structure buildings has also ushered in a new chapter. However, the current construction of high-rise prefabricated steel structure buildings is still based on the concept of building layer by layer from bottom to top. For this new type of structure, the traditional construction concept has many inadaptability. There are the following specific defects:

[0003] 1. During the construction process, a large number of different types of work will be carried out in a cross-operation manner. As a result, different types of work need to be coordinated and personnel from different types of work will affect each other. On the one hand, a certain type of work may not have a working surface or the equipment may not operate in time during construction, resulting in idle work. On the other hand, due to the simultaneous construction of multiple types of work, objects are prone to falling, resulting in high construction safety risks.

[0004] 2. After the bolt welding of the lower steel beam is completed, it is difficult to adjust and correct the upper steel beam. The interlacing and connection of the processes is more complicated, and the construction organization ability is required to be high.

[0005] 3. In this construction, steel column core pouring is the key task and will take up 1 day.

[0006] Since construction safety, quality and progress cannot be effectively guaranteed and the construction cost is high, the inventors proposed a high-rise steel structure building construction method to solve the above problems. Summary of the invention

[0007] In view of the above technical problems existing in the prior art, a high-rise steel structure building construction method is provided.

[0008] The purpose and effect of the present invention are achieved by the following specific technical means:

[0009] A high-rise steel structure building construction method comprises the following steps:

[0010] Construction preparation steps: Prepare steel columns, steel beams and formwork components in advance in the factory. The formwork components include multiple steel trusses and bottom membrane plates installed at the bottom of the multiple steel trusses. Transport the steel columns, steel beams, formwork components and connectors to the construction site.

[0011] Steps for dividing the ground plane into sections: Divide the construction site into several plane construction sections with the central axis as the axis of symmetry;

[0012] Vertical construction section division steps: steel columns of the same height are divided into a construction section, which is divided into a vertical construction section. The vertical construction section construction includes the construction of the axis grid unit module steel structure, steel column core filling and floor slab production;

[0013] The steps of the steel structure construction of the axis grid unit module are as follows: the foundation is laid in several divided plane construction sections, the steel columns are hoisted one by one to the foundation installation position, and they are fixed after adjustment and correction to form an axis grid unit. Multiple steel columns at the same height can be hoisted with a layer of steel beams, and the steel beams are welded with steel columns or other steel beams after adjustment and correction to form a frame unit.

[0014] Steel column core pouring steps: pour concrete in the steel column, and the order of steel column core pouring is from the middle of the axis grid unit to both sides;

[0015] Floor slab production steps: install several formwork components in the frame unit, then tie crisscross steel bars on the steel truss, fix the ends of the steel bars to the steel beams, and then pour concrete in the formwork components to form the floor slab. After the concrete reaches the required strength, remove the bottom membrane plate. The floor slab pouring sequence is from the middle of the frame unit to both sides. While laying the formwork components on both sides, pour the core of the steel column in the middle of the axis grid unit to complete the first round of vertical construction section construction;

[0016] The second round of vertical construction section construction steps: Based on the first round of vertical construction section, the steel columns are hoisted and spliced ​​to the steel columns of the first vertical construction section one by one. After the adjustment and correction, the upper and lower steel columns are welded together, and then the remaining steps in the first round of vertical construction section are repeated;

[0017] Construction steps for the remaining vertical construction sections: Repeat the second round of vertical construction steps multiple times to complete the construction of the high-rise steel structure building.

[0018] A further preferred solution: in the steps of constructing the axis grid unit module steel structure, the steel beams are installed one by one from bottom to top, and from the middle of the frame unit to both sides.

[0019] A further preferred solution: in the steps of constructing the modular steel structure of the axis grid unit, the multi-layer steel beams of the same axis grid unit are initially tightened with bolts from bottom to top, and then finally tightened and welded from top to bottom after the elevation and axis are rechecked for the second time, and both ends of each steel beam are welded to two steel columns or two other steel beams at the same time.

[0020] A further preferred solution is that the joint point at the upper end of the steel column is located about 1 meter above the top floor elevation.

[0021] A further preferred solution: In the steel column core pouring step, when pouring concrete on the steel column, a manual section-by-section pouring method is adopted. Concrete is poured into the steel column from the top and compacted using a vibrator with a power of 30-50W. Concrete is poured to about 30cm below the top of the column, leaving a construction joint, and then the floating slurry on the top of the column is removed and the pipe mouth is closed.

[0022] A further preferred solution is that two upper and lower adjacent steel columns are welded with full penetration welds.

[0023] A further preferred solution: in the floor slab manufacturing step, a rotary pump pipe is installed on a concrete pump to complete the concrete pouring of multiple floor slabs, and the rotary pump pipe rotates following the terrain.

[0024] A further preferred solution: the rotary pump pipe fitting includes a lower horizontal pump pipe, a rotary elbow and an upper horizontal pump pipe, the lower horizontal pump pipe is flange-connected to the concrete pump discharge end, the rotary elbow includes a lower elbow, a rotatable connecting pair and an upper elbow, the lower elbow is flange-connected to the lower horizontal pump pipe, the rotatable connecting pair is installed between the lower elbow and the upper elbow, and the upper elbow is flange-connected to the upper horizontal pump pipe.

[0025] A further preferred solution is that a support for supporting the lower curved pipe is installed at the bottom of the lower curved pipe, and a bracket is placed at the bottom of the upper horizontal pump pipe.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This type of high-rise steel structure construction method does not involve cross-operation of different types of work, and workers of different types of work do not affect each other. It has high work efficiency, and construction safety, quality, and progress can all be guaranteed. The construction operation is simpler, and the installation and adjustment of steel columns and steel beams are convenient. The steel column core pouring is transformed from a critical task to a non-critical task, which does not occupy construction period, takes less time, and has lower construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the construction process of the present invention;

[0029] Figure 2 This is a flow chart of construction from area A to area B in the first round of vertical construction section of the present invention;

[0030] Figure 3 This is a structural schematic diagram after the first round of vertical construction section construction of the present invention is completed;

[0031] Figure 4 This is a schematic diagram of the structure after the second round of vertical construction section of the present invention is completed;

[0032] Figure 5This is a structural schematic diagram of the third round of vertical construction section of the present invention after construction is completed;

[0033] Figure 6 It is a schematic diagram of the main structure of the template assembly of the present invention;

[0034] Figure 7 It is a schematic diagram of the front view structure of the rotary pump pipe fitting of the present invention.

[0035] Markings in the figure: steel column 1, floor slab 2, formwork assembly 3, steel truss 31, bottom membrane plate 32, lower horizontal pump pipe 4, lower bent pipe 5, upper bent pipe 6, lower horizontal pump pipe 7, rotatable connecting pair 8, support 9, bracket 10, splicing point 11, steel beam 12. DETAILED DESCRIPTION

[0036] See also Figure 1-7 , further illustrate the embodiments of the present invention;

[0037] A high-rise steel structure building construction method comprises the following steps:

[0038] Construction preparation steps: Prepare the steel column 1, steel beam 12 and formwork assembly 3 in the factory in advance, which can save a lot of construction time and shorten the construction period. During the processing of the steel column 1, set exhaust holes at the narrow part of the beam-column node according to the design requirements to ensure air circulation; when the steel column 1 is manufactured, the internal support legs should be in the same direction and reserve space for the vibrating rod; the formwork assembly 3 includes a plurality of steel trusses 31 and a bottom membrane plate 32 installed at the bottom of the plurality of steel trusses 31, and transport the steel column 1, steel beam 12, formwork assembly 3 and connectors to the construction site;

[0039] Steps for dividing the ground plane into sections: Divide the construction site into several plane construction sections with the central axis as the axis of symmetry; for example Figure 1 In the figure, area A is the middle area, and the two areas B are symmetrically distributed along area A, which is conducive to the stress stability of high-rise steel structure buildings;

[0040] Vertical construction section division steps: take steel columns 1 of the same height as a construction section, and divide it into a vertical construction section. The vertical construction section construction includes the construction of the axis grid unit module steel structure, the core pouring of steel columns 1 and the production of floor slabs 2;

[0041] The steps of the steel structure construction of the axis grid unit module are as follows: the foundation is laid in several divided plane construction sections, and the steel columns 1 are hoisted one by one to the foundation installation position by using a tower crane. The steel columns 1 are constructed symmetrically from the central axis to both sides and the elevation, axis, and verticality deviation are adjusted in turn. The positioning axis of each section of the steel column 1 is drawn out from the ground reference line, and then the steel column 1 is temporarily fixed to the foundation with a cable wind rope. After the steel column 1 is adjusted and corrected, it is fixed to the foundation through bolts to form an axis grid unit. Multiple steel columns 1 of the same height can hoist 3 layers of steel beams 12. The steel beams 12 are adjusted and corrected. After that, first use bolts to connect with the steel column 1 or another steel beam 12, and then fix the steel beam 12 with the steel column 1 and the steel beam 12 with the steel beam 12 by welding to form a frame unit, and the steel beams 12 are installed one by one from bottom to top, and installed from the middle of the frame unit to both sides. After installation, each plane construction section is used as an acceptance unit for acceptance; the installation between the steel column 1 and the steel beam 12 is all steel structure installation, which is the same type of work, so there is no cross-operation of different types of work in this construction, which is convenient for the installation adjustment and correction of the steel beam 12, and the construction is easier;

[0042] Steps for pouring the core of steel column 1: pour concrete in steel column 1 to strengthen the strength of steel column 1. The order of pouring the core of steel column 1 is from the middle of the axis grid unit to both sides. When pouring concrete in steel column 1, the manual pouring method is adopted. The concrete is poured from the top of steel column 1 and compacted with a vibrator. The power of the vibrator is 45W. For steel columns 1 with different pipe cross-section sizes, the corresponding vibrating method is adopted. When the minimum side length is greater than 350mm, an internal vibrator is used. When the minimum side length is less than 350mm, an external vibrator is used and the position is adjusted with the pouring height. The concrete in steel column 1 should be poured continuously, and the interval time shall not exceed the final setting time of the concrete. Pour to about 30cm below the top of the column, leave a construction joint, then remove the floating slurry at the top of the column, and close the pipe mouth to prevent pollution.

[0043] The steps of making the floor slab 2 are as follows: a number of formwork components 3 are installed in the frame unit, and then crisscross steel bars are tied on the steel trusses 31, and the ends of the steel bars are fixed together with the steel beams 12, and then concrete is poured in the formwork components 3 to form the floor slab 2. After the concrete reaches the strength, the bottom membrane plate 32 is removed. The pouring sequence of the floor slab 2 is advanced from the middle of the frame unit to both sides, and while paving the formwork components 3 on both sides, the steel column 1 in the middle of the axis grid unit is poured to complete the first round of vertical construction section construction. A rotary pump pipe fitting (usually a hard pipe fitting made of steel) is installed on the concrete pump to complete the concrete pouring of multiple floor slabs 2. The rotary pump pipe fitting can rotate with the terrain, making the concrete pouring of the floor slab 2 more convenient;

[0044] Specifically, Figure 7As shown, the rotary pump pipe fitting comprises a lower horizontal pump pipe 4, a rotary elbow and an upper horizontal pump pipe 7. The lower horizontal pump pipe 4 is flange-connected to the concrete pump discharge end. The rotary elbow comprises a lower elbow 5, a rotatable connection pair 8 and an upper elbow 6. The lower elbow 5 is flange-connected to the lower horizontal pump pipe 4. The rotatable connection pair 8 is installed between the lower elbow 5 and the upper elbow 6. The upper elbow 6 is flange-connected to the upper horizontal pump pipe 7. Both the lower elbow 5 and the upper elbow 6 are elbows bent 90°. When pumping concrete, since the weight at the lower elbow 5 is relatively heavy and the horizontal impact force of the rotary pump pipe fitting is concentrated there, a base is provided to bear the weight and horizontal impact force at the elbow. A support 9 for supporting the lower elbow 5 is installed at the bottom of the lower elbow 5. A bracket 10 is placed at the bottom of the upper horizontal pump pipe 7 to support the upper horizontal pump pipe 7.

[0045] When a concrete pump is needed, move the concrete pump and the rotary pump pipe to the formwork assembly 3 with laid steel bars, place the concrete pump in the area where the concrete has been prepared, and start the concrete pump. The prepared concrete can be pumped into the lower horizontal pump pipe 4, the lower curved pipe 5, the upper curved pipe 6 and the upper horizontal pump pipe 7 in sequence, and finally the concrete is discharged into the formwork assembly 3 through the upper horizontal pump pipe 7 and the rotatable connecting pair 8 in the rotary curved pipe.

[0046] When pouring floor slab concrete during multi-story three-dimensional construction, due to the limitation of floor height, it is impossible to use a car pump for pouring, nor can it be poured using a tower crane in combination with a pump. In order to pour the floor slab 2 for each room in the building, the heavy pump pipe (made of steel) is usually dragged forcibly to pour the floor slab 2, which is very likely to cause damage to the bottom membrane plate 32. In order to solve this problem, the present invention uses a concrete pump + a rotating pump pipe to change the pump pipe dragging method to a rotating method. By lateral swinging the upper horizontal pump pipe 7 and the upper curved pipe 6, the upper curved pipe 6 will rotate in the rotatable connection pair 8. The rotatable connection pair 8 allows the upper curved pipe 6 to rotate 360°, so as to facilitate the pouring of the floor slab 2 of each room in the high-rise, thereby improving the pouring efficiency and reducing the labor intensity.

[0047] The construction steps of the second round of vertical construction section are as follows: on the basis of the first round of vertical construction section, the steel columns 1 are hoisted and spliced ​​one by one to the steel columns 1 of the first vertical construction section, and the splicing point 11 at the upper end of the steel column 1 is located about 1 meter above the elevation of the uppermost floor slab 2. After the steel column 1 is adjusted and corrected, the upper and lower steel columns 1 are welded together, and the upper and lower adjacent steel columns 1 are welded with full penetration welds, and then the remaining steps in the first round of vertical construction section are repeated;

[0048] Construction steps for the remaining vertical construction sections: Repeat the second round of vertical construction steps multiple times to complete the construction of the high-rise steel structure building.

[0049] When the high-rise steel structure construction method of this embodiment is implemented, in the construction preparation step, the steel column 1, the steel beam 12 and the formwork assembly 3 are prepared in advance in the factory. During processing, under the "three-layer integration" construction organization, that is, a vertical construction section, according to the progress of the on-site construction, the plane section is used as a unit for supply, and the formwork assembly 3 is numbered and packaged in a bottom-up order in each axis network unit, which can save a lot of construction time and shorten the construction period;

[0050] In the steel structure construction steps of the axis grid unit module, the installation between the steel column 1 and the steel beam 12 is all steel structure installation, which is the same type of work. There is no cross-operation of different types of work in this construction. The multi-layer steel beam 12 of the same axis grid unit is first tightened with bolts from bottom to top to facilitate the installation adjustment correction of the steel beam 12. After the elevation and axis are rechecked for the second time, they are finally tightened and welded from top to bottom. It should be noted that the beam-column (steel column 1 and steel beam 12) joint is fully penetrated and welded. The lower flange plate between the beam and column is welded first, and then the upper flange plate between the beam and column is welded to reduce the angle. deformation; and the two ends of each steel beam 12 are welded to two steel columns 1 or two other steel beams 12 at the same time, ensuring that the steel beam 12 is accurately installed and stably stressed, which can reduce welding constraints, prevent secondary deflection due to welding, and make steel structure construction easier; in addition, during the second round of vertical construction section construction, the two adjacent steel columns 1 above and below are assembled together, and full penetration welds are adopted. Symmetric, isothermal and constant-speed welding is adopted during welding to ensure stable connection between the steel columns 1, and the elevation adjustment of the joints of the steel columns 1 is adjusted by the cooperation of the jack.

[0051] Before the step of pouring the core of the steel column 1, several formwork components 3 are installed in the frame unit, and then crisscross steel bars are tied on the steel truss 31, and the ends of the steel bars are fixed together with the steel beams 12. The construction sequence is to advance from the middle of the frame unit to both sides. When laying the formwork components 3 on both sides of the frame unit (area B), concrete can be poured inside the steel column 1 in the middle of the axis grid unit (area A) at the same time. Similarly, when pouring concrete inside the steel column 1 in area B, the floor slab 2 can be made in area A at the same time. Therefore, the pouring of the core of the steel column 1 in this construction method is a non-critical task and no longer occupies a separate construction period. When constructing the third floor slab 2 (the uppermost slab 2 in the vertical construction section), the second round of vertical construction section construction is carried out. The steel columns 1 are hoisted and spliced ​​one by one to the steel columns 1 of the first vertical construction section in area A. The splicing point 11 at the upper end of the steel column 1 is located about 1 meter above the elevation of the uppermost slab 2. After the steel column 1 is adjusted and corrected, the upper and lower steel columns 1 are welded together. The upper and lower adjacent steel columns 1 use full penetration welds, and then the remaining steps in the first round of vertical construction section construction are repeated. The remaining vertical construction section construction steps can repeat the second round of vertical construction section construction steps multiple times to complete the high-rise steel structure building construction.

[0052] Compared with the existing high-rise steel structure construction, this construction method does not have the problem of cross-operation of different types of work, and different types of work do not affect each other. The work efficiency is high, and the construction safety, quality, and progress can be guaranteed. The construction operation is simpler, and the steel column 1 and the steel beam 12 are easy to install and adjust. The core pouring of the steel column 1 is transformed from a critical task to a non-critical task, which does not occupy the construction period, takes less time, and has lower construction costs.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A high-rise steel structure construction method, characterized in that: The following steps are involved: Construction preparation steps: Prepare steel columns, steel beams and formwork components in advance in the factory. The formwork components include multiple steel trusses and bottom membrane plates installed at the bottom of the multiple steel trusses. Transport the steel columns, steel beams, formwork components and connectors to the construction site. Steps for dividing the ground plane into sections: Divide the construction site into several plane construction sections with the central axis as the axis of symmetry; Vertical construction section division steps: steel columns of the same height are divided into a construction section, which is divided into a vertical construction section. The vertical construction section construction includes the construction of the axis grid unit module steel structure, steel column core filling and floor slab production; The steps of the steel structure construction of the axis grid unit module are as follows: the foundation is laid in several divided plane construction sections, the steel columns are hoisted one by one to the foundation installation position, and they are fixed after adjustment and correction to form an axis grid unit. Multiple steel columns of the same height can be hoisted with 2-4 layers of steel beams. After adjustment and correction, the steel beams are welded with steel columns or other steel beams to form a frame unit. Steel column core pouring steps: pour concrete in the steel column, and the order of steel column core pouring is from the middle of the axis grid unit to both sides; Floor slab production steps: install several formwork components in the frame unit, then tie crisscross steel bars on the steel truss, fix the ends of the steel bars to the steel beams, and then pour concrete in the formwork components to form the floor slab. After the concrete reaches the required strength, remove the bottom membrane plate. The floor slab pouring sequence is from the middle of the frame unit to both sides. While laying the formwork components on both sides, pour the core of the steel column in the middle of the axis grid unit to complete the first round of vertical construction section construction; The second round of vertical construction section construction steps: Based on the first round of vertical construction section, the steel columns are hoisted and spliced ​​to the steel columns of the first vertical construction section one by one. After the adjustment and correction, the upper and lower steel columns are welded together, and then the remaining steps in the first round of vertical construction section are repeated; Construction steps for the remaining vertical construction sections: Repeat the second round of vertical construction steps for multiple times to complete the construction of the high-rise steel structure building.

2. A high-rise steel structure construction method according to claim 1, characterized in that: In the steps of constructing the axis grid unit module steel structure, the steel beams are installed one by one from bottom to top, and from the middle of the frame unit to both sides.

3. A high-rise steel structure construction method according to claim 1 or 2, characterized in that: In the steps of constructing the modular steel structure of the axis grid unit, the multi-layer steel beams of the same axis grid unit are initially tightened with bolts from bottom to top, and then finally tightened and welded from top to bottom after the elevation and axis are rechecked for the second time, and both ends of each steel beam are welded to two steel columns or two other steel beams at the same time.

4. A high-rise steel structure construction method according to claim 1, characterized in that: The upper end joint point of the steel column is located about 1 meter above the top floor elevation.

5. A high-rise steel structure construction method according to claim 1, characterized in that: In the steel column core pouring step, when pouring concrete on the steel column, a manual section-by-section pouring method is adopted. Concrete is poured into the steel column from the top and compacted using a vibrator with a power of 30-50W. Concrete is poured to about 30cm below the top of the column, leaving a construction joint, and then the floating slurry on the top of the column is removed and the pipe mouth is closed.

6. A high-rise steel structure construction method according to claim 1, characterized in that: The two upper and lower adjacent steel columns adopt full penetration welds.

7. A high-rise steel structure construction method according to claim 1, characterized in that: In the floor slab manufacturing step, a rotary pump pipe is installed on a concrete pump to complete the concrete pouring of multiple floor slabs, and the rotary pump pipe rotates following the terrain.

8. A high-rise steel structure construction method according to claim 7, characterized in that: The rotary pump pipe fitting comprises a lower horizontal pump pipe, a rotary elbow and an upper horizontal pump pipe. The lower horizontal pump pipe is flange-connected to the concrete pump discharge end. The rotary elbow comprises a lower elbow, a rotatable connecting pair and an upper elbow. The lower elbow is flange-connected to the lower horizontal pump pipe. The rotatable connecting pair is installed between the lower elbow and the upper elbow. The upper elbow is flange-connected to the upper horizontal pump pipe.

9. A high-rise steel structure construction method according to claim 8, characterized in that: A support for supporting the lower curved pipe is installed at the bottom of the lower curved pipe, and a bracket is placed at the lower part of the upper horizontal pump pipe.

Images