Method for installing steel structure in limited space

Abstract

The invention relates to the technical field of steel structure installation in building construction, and provides a limited space steel structure installation method which comprises the steps that S1, an operation platform is erected at the unlimited end of a construction space, and a steel beam positioning line is arranged on the operation platform; s2, a concrete structural beam is constructed, and a sliding rail is installed on the concrete structural beam; s3, the steel beams are preliminarily assembled on the operation platform along the steel beam positioning lines, multiple steel beams are assembled as a group, and steel beam units are obtained; a turnover type rotating clamp is installed outside the steel beam unit; a sliding carrier is used for carrying the steel beam unit, and the steel beam unit is transported to a designated position on the sliding rail from the operation platform; s4, after the steel beam unit slides to the designated position, the steel beam unit is lifted, the turnover type rotating clamp is detached, and the steel beam unit is installed in place according to the design requirement; and S5, the steps S3 to S4 are repeated, and sliding installation of the next steel beam unit is conducted. The construction efficiency in the limited space can be improved, and the construction cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of steel structure installation in building construction, and in particular to a method for installing a steel structure in a confined space. Background Art

[0002] In some specific construction projects, due to the limited construction space, large lifting machinery can only find enough standing space on one side to operate. In this case, the traditional construction method often requires the construction of a full-floor scaffolding to expand the layout of the steel structure in order to provide the necessary operating space for the lifting equipment. However, this method has obvious disadvantages. First, due to the limited working range, large lifting machinery cannot directly enter the core construction area and has to be arranged outside the building, which leads to a significant increase in the working radius, which in turn seriously affects the working efficiency and maximum lifting capacity of the lifting equipment. As a result, the steel beams that could have been hoisted as a whole must be split into smaller parts for installation.

[0003] In addition, the construction of full-floor scaffolding not only increases the direct cost of the project, but also hinders the simultaneous implementation of other processes (such as interior decoration and renovation) because it occupies space on the construction site, thereby extending the total construction period of the entire project. Furthermore, splitting the steel beam into multiple parts for hoisting and on-site assembly also means that more welding work needs to be done on site, which not only increases the difficulty and time of construction, but may also cause a decline in welding quality because on-site welding conditions are not as controllable as factory environments, ultimately affecting the overall structural performance of the steel beam and the safety of the building. Therefore, when faced with such working conditions, it is very necessary to explore more efficient, economical construction methods that do not affect other processes. Summary of the invention

[0004] In order to improve the construction efficiency in confined spaces and reduce construction costs, the present application provides a confined space steel structure installation method.

[0005] The present application provides a method for installing a confined space steel structure, comprising the following steps: S1: Set up an operating platform at one end of the construction space where there is no restriction, and lay out the steel beam positioning line on the operating platform; S2: constructing a concrete structural beam and installing a sliding track on the concrete structural beam to form an integrated supporting track structure; S3: Preliminarily assemble the steel beams along the steel beam positioning line on the operating platform, assemble multiple steel beams as a group, and obtain a steel beam unit; install a rotatable rotating fixture outside the steel beam unit, and the rotatable rotating fixture is detachably connected to the steel beam; use a sliding carrier to carry the steel beam unit, and transport the steel beam unit from the operating platform to a designated position on the sliding track; S4: After the steel beam unit slides to the specified position, the steel beam unit is lifted by a lifting mechanism, the rotatable fixture on the steel beam unit is removed, the steel beam unit is installed in place according to the design requirements, and the sliding carrier returns to the operating platform; S5: Repeat steps S3 to S4 to perform sliding installation of the next steel beam unit.

[0006] By adopting the above technical solution, an operating platform is set up at one end of the confined space and a sliding track is installed to form an integrated support track structure, thereby realizing efficient installation of steel structures in confined spaces. This method reduces the use of full-height scaffolding, reduces costs, shortens construction period, and improves installation efficiency and safety and reduces the operating cost of steel beams through the use of sliding carriers and rotatable fixtures.

[0007] Optionally, the step S2 specifically includes: S21: constructing a lower steel cage in the construction space, pre-embedding height adjustment bolts on the top of the lower steel cage, and then performing a first concrete pouring to form a lower concrete structural beam; S22: Installing a sleeper on the top of the height adjustment bolt; S23: fixing the sliding rail on the sleeper; S24: constructing an upper steel cage above the lower concrete structural beam, and then performing a second concrete pouring to form an upper concrete structural beam with a track groove.

[0008] By adopting the above technical solution, a stable support track structure is formed by constructing concrete structural beams in steps and installing sliding tracks on the concrete structural beams. The quality of the concrete structural beams is ensured, and a solid support foundation is provided for the sliding tracks, thereby enhancing the stability of the overall structure. In addition, the height adjustment bolts are embedded to achieve the height adjustment of the sleeper installation position to meet different construction requirements.

[0009] Optionally, in step S24, before the second concrete pouring, the track corner guard is first installed on the upper steel cage.

[0010] By adopting the above technical solution, the track corner guard is installed before the second concrete pouring to protect the side wall of the track groove, reduce the wear of the track groove caused by the sliding vehicle, and extend the service life of the track obtained after pouring.

[0011] Optionally, the method further includes step S6: after all steel beam units are installed, the track groove is filled with slurry.

[0012] By adopting the above technical solution, the bonding strength between the track and the concrete structure can be further enhanced, preventing the track from loosening or falling off during long-term use, thereby improving the safety and durability of the structure.

[0013] Optionally, in step S21, after the lower steel cage is built, a reserved dowel bar is embedded in the lower steel cage, and one end of the reserved dowel bar is exposed outside the lower steel cage; In the step S24, when the upper steel cage is constructed, one end of the reserved dowel bar exposed outside the lower steel cage is connected to the upper steel cage.

[0014] By adopting the above technical solution, the reserved dowel bars are embedded after the lower steel cage is built, and the reserved dowel bars are connected when the upper steel cage is built, thereby achieving an effective connection between the upper and lower structures and enhancing the integrity and stability of the structure.

[0015] Optionally, the rotatable rotating clamp includes two clamping frames arranged opposite to each other, and the clamping frames include a clamping plate and a horizontal pad fixed to the bottom of the clamping plate, an abutment rib is provided on one side of the clamping plate, a plurality of connecting bolts are passed through the abutment rib, and one end of the connecting bolt is used for threaded connection with the steel beam.

[0016] By adopting the above technical scheme, the setting of the clamping plate and abutment ribs in the rotatable rotary clamp enables the steel beam to be firmly fixed during the assembly and sliding process, and the detachable connection between the rotatable rotary clamp and the steel beam is achieved through connecting bolts, which facilitates the reuse of the rotatable rotary clamp, reduces the workload of on-site welding, improves construction efficiency, and ensures the safety of the steel beam during the sliding process.

[0017] Optionally, the sliding track includes a mounting base, a guide rail, and a connecting beam connected between the mounting base and the guide rail, and a plurality of shear rivets are provided on the connecting beam.

[0018] By adopting the above technical solution, the structure of the sliding track adopts a mounting base, guide rails and connecting beams, and is provided with shear rivets, which enhances the shear resistance of the track and the stability of the overall structure, ensuring smoothness and safety during the sliding process.

[0019] Optionally, the lifting mechanism adopts a jack.

[0020] By adopting the above technical solution and using a jack as a lifting mechanism, the steel beam can be accurately positioned and lifted, ensuring high precision and safety during the installation process. At the same time, the use of the jack also improves construction efficiency and the simplicity of the steel beam lifting steps.

[0021] In summary, the present application includes at least one of the following beneficial effects: 1. In this application, a sliding track is installed on the concrete structural beam to form an integrated support track structure, which increases the mechanical indicators such as the bending strength and shear strength of the concrete structural beam, increases the stability of the track beam, and increases the safety performance of the sliding construction; 2. The sliding track in this application is fixed on the sleepers, which not only increases the mechanical indicators such as bending strength and shear strength of the integrated support track structure, but also plays a role in accurately controlling the track direction of the sliding track; 3. In the present application, the steel beam is clamped by a rotatable fixture, which can be quickly disassembled and quickly rotated, thereby reducing the cost investment required for sliding the steel beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the integrated support track structure in an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of a rotatable rotating fixture in an embodiment of the present application; Explanation of the reference numerals in the accompanying drawings: 1. Steel beam; 2. Integrated support track structure; 21. Sliding track; 211. Mounting base; 212. Guide rail; 213. Connecting beam; 214. Shear rivet; 22. Height adjustment bolt; 221. Screw; 222. Adjusting nut; 223. Tightening nut; 23. Lower concrete structure beam; 24. Sleeper; 25. Upper concrete structure beam; 251. Track groove; 26. Reserved dowel bar; 3. Turnable rotating fixture; 31. Clamping frame; 311. Clamping plate; 312. Horizontal pad; 313. Abutting rib; 32. Connecting bolt; 4. Sliding carrier; 5. Lifting mechanism; 6. Track corner guard; 61. Embedded anchor rod; 7. Pressing sheet. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-2 This application is described in further detail.

[0024] The present application embodiment provides a method for installing a steel structure in a confined space, comprising the following steps: S1: Set up an operating platform at the unrestricted end of the construction space and lay out the steel beam positioning line on the operating platform.

[0025] Reference Figure 1 , choose one end of the construction space that is not restricted as the location for setting up the operating platform to ensure that there is enough space for the assembly of the steel beam 1 and the operation of the sliding carrier 4. The size of the operating platform should be suitable for accommodating the assembly of multiple steel beams 1, while ensuring the safety and stability of the operating platform. When laying out the steel beam positioning line according to the design drawings, tools such as ink fountains or laser marking instruments can be used for auxiliary laying out to ensure the accuracy of the positioning line.

[0026] S2: Construct a concrete structural beam and install a sliding track 21 on the concrete structural beam to form an integrated supporting track structure 2.

[0027] Step S2 specifically includes: S21: Build the lower steel cage in the construction space, refer to Figure 2 , a height adjustment bolt 22 is embedded on the top of the lower steel cage. Subsequently, two rows of vertically placed reserved dowel bars 26 are embedded in the lower steel cage, and a row of multiple reserved dowel bars 26 are evenly spaced and exposed at one end outside the lower steel cage; and then the first concrete pouring is performed to form a lower concrete structural beam 23.

[0028] Specifically, refer to Figure 2 The height adjustment bolt 22 includes a screw rod 221, an adjustment nut 222 and a tightening nut 223 threadedly connected to one end of the screw rod 221. The height adjustment bolt 22 and the reserved dowel bar 26 are connected and fixed to the lower steel cage by welding or wire binding.

[0029] S22: Install the sleeper 24 on the top of the height adjustment bolt 22. When installing the sleeper 24, first remove the fastening nut 223 on each screw rod 221, and screw the adjusting nut 222 on each adjusting screw rod 221 to change the vertical position of the adjusting nut 222 so that the adjusting nut 222 moves to a suitable height. Then, pass one end of the bolt through the sleeper 24 so that the bottom of the sleeper 24 abuts against the adjusting nut 222. Subsequently, screw the fastening nut 223 onto the screw rod 221 again so that the fastening nut 223 and the adjusting nut 222 on one screw rod 221 abut against the sleeper 24 together.

[0030] S23: The sliding rail 21 is fixedly installed on the sleeper 24 .

[0031] Specifically, refer to Figure 1 and Figure 2 The sliding track 21 includes a mounting base 211, a guide rail 212, and a connecting beam 213 integrally formed between the mounting base 211 and the guide rail 212, and a plurality of shear rivets 214 are installed on both sides of the connecting beam 213. A pressing plate 7 is provided on both sides of the base of the sliding track 21, and the pressing plate 7 is fixed to the sleeper 24 by bolts; the cross section of the pressing plate 7 close to the mounting base 211 is gradually reduced in the direction close to the mounting base 211, and the gradually reduced end of the pressing plate 7 extends to the upper surface of the base and presses against the base, thereby realizing the fixed installation of the sliding track 21 on the sleeper 24.

[0032] S24: Build an upper steel cage above the lower concrete structure beam 23, and connect the end of the reserved dowel 26 exposed outside the lower steel cage to the upper steel cage by welding or wire tying. First, install the track angle guard 6 on the upper steel cage. Then, pour concrete for the second time to form an upper concrete structure beam 25 with a track groove 251. The track angle guard 6 is set to protect the side wall of the track groove 251.

[0033] Reference Figure 2 In the present embodiment, the rail angle protector 6 specifically adopts an angle iron angle protector, and a pre-buried anchor rod 61 is integrally formed on the rail angle protector 6. The pre-buried anchor rod 61 is passed through the upper steel cage and fixedly connected to the upper steel cage.

[0034] The sliding track 21 is installed on the concrete structural beam to form a stable integrated support track structure 2. The sliding track 21 does not need to be removed, which reduces the amount of steel bars, enhances the bending strength and shear strength of the concrete structural beam, and improves the stability of the track beam and the safety performance of the sliding construction.

[0035] S3: Preliminary assembly of the steel beam 1 along the steel beam positioning line on the operating platform, and multiple steel beams 1 are assembled as a group to obtain a steel beam unit. The steel beam unit is fixed with a rotatable rotating fixture 3 to ensure that the assembled steel beam unit is stable, and the rotatable rotating fixture 3 is detachably connected to the steel beam 1. The steel beam unit is carried by a sliding carrier 4, and the steel beam unit is transported from the operating platform to a designated position on the sliding track 21. In this embodiment, two steel beams 1 are assembled as a group to form a steel beam unit.

[0036] Reference Figure 1 The rotatable clamp 3 includes two clamping frames 31 arranged opposite to each other, and the clamping frames 31 include a clamping plate 311 and a horizontal pad 312 fixed to the bottom of the clamping plate 311. The two clamping plates 311 are integrally formed with abutting ribs 313 on the opposite sides, and a plurality of connecting bolts 32 are passed through the abutting ribs 313. When clamping the steel beam 1, the abutting ribs 313 abut against the side wall of the steel beam 1, and one end of the connecting bolt 32 is threadedly connected to the steel beam 1. Among them, the sliding carrier 4 is controlled by a computer, and the coordinate command can be input by the computer to control the sliding carrier 4 to automatically brake at the specified coordinate position, so as to achieve accurate positioning of the steel beam 1 during transportation.

[0037] S4: When the steel beam unit slides to the designated position, the lifting mechanism 5 is used to lift the steel beam unit, the rotatable rotating fixture 3 on the steel beam unit is removed, the steel beam unit is installed in place according to the design requirements, and the sliding carrier 4 is controlled by the computer to return to the operating platform to prepare for the transportation of the next group of steel beam units. The lifting mechanism specifically uses a hydraulic jack, and the hydraulic jack can be controlled by a computer to improve the safety of operation.

[0038] The steel beam 1 is clamped by a rotatable swivel clamp 3 which can be quickly disassembled and circulated, thereby reducing the cost investment required for sliding the steel beam 1, improving construction efficiency, and ensuring the safety of the steel beam 1 during the sliding process.

[0039] S5: Repeat steps S3 to S4 to perform sliding installation of the next steel beam unit until all steel beam units have completed sliding installation.

[0040] S6: After all the steel beam units are installed, the track groove 251 is filled with slurry to enhance the bonding strength between the sliding track 21 and the concrete structure and prevent the sliding track 21 from loosening or falling off.

[0041] In summary, this embodiment provides an effective method for installing a steel structure in a confined space, and achieves efficient and safe installation of the steel structure through reasonable step arrangement and technical measures.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for installing a steel structure in a confined space, characterized in that: The steps include: S1: Set up an operating platform at one end of the construction space where there is no restriction, and lay out the steel beam positioning line on the operating platform; S2: constructing a concrete structural beam and installing a sliding track (21) on the concrete structural beam to form an integrated support track structure (2); S3: Preliminarily assembling the steel beam (1) along the steel beam positioning line on the operating platform, assembling multiple steel beams (1) as a group to obtain a steel beam unit; installing a rotatable rotating fixture (3) outside the steel beam unit, and the rotatable rotating fixture (3) is detachably connected to the steel beam (1); using a sliding carrier (4) to carry the steel beam unit, and transporting the steel beam unit from the operating platform to a designated position on the sliding track (21); S4: When the steel beam unit slides to the specified position, the lifting mechanism (5) is used to lift the steel beam unit, and the rotatable rotating fixture (3) on the steel beam unit is removed. The steel beam unit is then installed in place according to the design requirements, and the sliding carrier (4) returns to the operating platform; S5: Repeat steps S3 to S4 to perform sliding installation of the next steel beam unit.

2. A method for installing a confined space steel structure according to claim 1, characterized in that: The step S2 specifically includes: S21: constructing a lower steel cage in the construction space, pre-embedding height adjustment bolts (22) on the top of the lower steel cage, and then performing a first concrete pouring to form a lower concrete structural beam (23); S22: Installing a sleeper (24) on the top of the height adjustment bolt (22); S23: fixing the sliding rail (21) above the sleeper (24); S24: constructing an upper layer of steel cage above the lower layer of concrete structural beam (23), and then performing a second concrete pouring to form an upper layer of concrete structural beam (25) with a track groove (251).

3. A method for installing a confined space steel structure according to claim 2, characterized in that: In the step S24, before the second concrete pouring, the track corner guard (6) is installed on the upper steel cage.

4. A method for installing a confined space steel structure according to claim 3, characterized in that: The method further comprises step S6: after all the steel beam units are installed, the track groove (251) is filled with slurry.

5. The method for installing a confined space steel structure according to claim 3, characterized in that: In the step S21, after the lower layer steel cage is built, a reserved dowel bar (26) is embedded in the lower layer steel cage, and one end of the reserved dowel bar (26) is exposed outside the lower layer steel cage; In the step S24, when constructing the upper steel cage, one end of the reserved dowel bar (26) exposed outside the lower steel cage is connected to the upper steel cage.

6. A method for installing a confined space steel structure according to claim 1, characterized in that: The rotatable swivel clamp (3) comprises two clamping frames (31) arranged opposite to each other, and the clamping frames (31) comprise a clamping plate (311) and a horizontal pad (312) fixed to the bottom of the clamping plate (311), one side of the clamping plate (311) is provided with an abutment rib (313), and a plurality of connecting bolts (32) are passed through the abutment rib (313), and one end of the connecting bolt (32) is used for threaded connection with the steel beam (1).

7. A method for installing a confined space steel structure according to claim 1, characterized in that: The sliding track (21) comprises a mounting base (211), a guide rail (212), and a connecting beam (213) connected between the mounting base (211) and the guide rail (212), wherein a plurality of shear-resistant rivets (214) are provided on the connecting beam (213).

8. The method for installing a confined space steel structure according to claim 1, characterized in that: The lifting mechanism (5) adopts a jack.

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