A construction method for a multi-wall system on the top floor of a high-rise building

Abstract

This invention discloses a construction method for a multi-panel wall system on the top floor of a high-rise building. The method specifically includes the following steps: S1, measuring the steel column installation points on the corresponding floors based on the installation positions of the steel columns in the third frame layer; and pre-embedding the anchor bolt fixing frames; S2, hoisting the steel columns and connecting and fixing the bottoms of the steel columns to the pre-embedded anchor bolt fixing frames to complete the hoisting of the steel columns in the third frame layer; S3, after the steel columns are installed, hoisting steel beams and installing them between the steel columns to complete the installation of the third frame layer unit; S4, after the third frame layer is installed, hoisting the steel columns and beams of the first and second frame layers in sequence; after the first and second frame layers are installed, installing the fourth and fifth frame layers in sequence to complete the installation of the multi-layer single-panel wall. This invention improves the stability of the steel structure frame layer installation by installing the intermediate frame layer first, followed by the side frame layers.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a construction method for a multi-wall system on the top floor of a high-rise building. Background Technology

[0002] With the acceleration of urbanization, the demand for renovation of existing high-rise buildings is increasing, especially for rooftop areas which often require functional upgrades through the addition of facilities (such as equipment floors, green spaces, or functional floors). However, the original structural design of existing building rooftops often does not reserve extra load redundancy, leading to problems such as insufficient load-bearing capacity and decreased seismic performance during the renovation process, making it urgent to strengthen the rooftop structure.

[0003] The shortcomings of existing technology:

[0004] 1. Installation accuracy control is difficult; high-rise steel structures require extremely high precision in component positioning, especially the top floor structure, which needs to cope with dynamic effects such as wind load and temperature deformation, resulting in large errors in high-altitude installation.

[0005] 2. Construction safety under complex working conditions; risks of component hoisting: large volume and weight of top-floor steel components; inconvenient hoisting;

[0006] 3. High-altitude welding quality; welding operations need to overcome the influence of weather (such as wind, rain, and low temperature), and thick plate welding is prone to deformation and residual stress, resulting in uneven stress distribution.

[0007] 4. Application No. 202110752859.8 discloses a construction and installation method for steel structures of super high-rise buildings, S1: material preparation; S2: steel structure installation; S3: steel structure welding; S4: base plate welding; S5: steel structure hoisting; S6: steel structure inspection. This method is only suitable for steel frame types with reinforcement of the top floor of conventional high-rise buildings. It is not stable for reinforcement of stepped roofs. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a construction method for a multi-wall system on the top floor of a high-rise building. The method of this invention improves the stability of the steel structure frame layer installation by first installing the intermediate frame layer and then installing the frame layers on both sides.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0010] A construction method for a multi-panel wall system on the top floor of a high-rise building involves setting up a multi-panel wall system composed of multiple single-panel walls on the top floor of the high-rise building. This multi-panel wall system includes a first frame layer, a second frame layer, a third frame layer, a fourth frame layer, and a fifth frame layer, with the multiple single-panel walls distributed in a stepped manner. The method specifically includes the following steps:

[0011] S1. Based on the installation position of the steel columns in the third frame layer, measure the installation points of the steel columns on the corresponding floors; and pre-embed the anchor bolt fixing brackets at the measurement points;

[0012] S2, hoist the steel columns and connect and fix the bottom of the steel columns to the pre-embedded anchor bolt fixing frames to complete the hoisting of the steel columns in the third frame layer;

[0013] S3, After the steel columns are installed, the hoisted steel beams are installed between the steel columns to complete the installation of the third frame layer unit;

[0014] S4. After the third frame layer is installed, the steel columns and beams of the first and second frame layers are hoisted in sequence. After the first and second frame layers are hoisted, the fourth and fifth frame layers are installed in sequence to complete the installation of the multi-layer single-panel wall.

[0015] Furthermore, the anchor bolt fixing frame is an overall grid structure. The anchor bolt fixing frame includes long bolts and fixing steel plates. Long bolts are set at the four corners of the fixing steel plates. The long bolts are perpendicularly connected to the fixing steel plates. Two fixing steel plates are set parallel to each other on the long bolts. When the anchor bolt fixing frame is pre-embedded, the fixing steel plates are pre-embedded in the concrete, and the long bolts protrude from the concrete.

[0016] Furthermore, the steel column is hoisted as follows:

[0017] S21, steel column pretreatment: Before hoisting the steel column, install lifting lugs at the four corners of the top of the steel column and place sleepers at the bottom of the steel column;

[0018] S22, connect the lifting lugs on the steel column to the hooks with slings, raise the top of the steel column by 1m, and install guy ropes on the top of the steel column;

[0019] S23, lift the steel column and hoist it above the pre-embedded anchor bolt fixing frame, so that the bottom of the steel column is bolted and fixed to the anchor bolt fixing frame;

[0020] S24 connects the guy rope to the pre-embedded steel anchor ring on the floor to fix the steel column on the floor.

[0021] Furthermore, guy ropes are installed at the four corners of the upper part of the steel column. One end of the guy rope is connected to the lifting lug, and the other end of the guy rope is connected and fixed to the steel anchor rings embedded in the floor. The guy ropes are at a 45° angle to the floor.

[0022] Furthermore, before the steel column is lifted, a ladder is installed on the side of the steel column, and construction workers use the ladder to connect and install the steel column and the steel beam. The included angle between the slings is no greater than 30°.

[0023] Furthermore, the steel beam hoisting specifically involves:

[0024] S31, steel beam pretreatment, with lifting lugs installed at both ends of the side of the steel beam;

[0025] S32, the lifting lugs on the steel beam are connected to the lifting hooks respectively by slings;

[0026] S23, lift the steel beam and install it between the steel columns, so that both ends of the steel beam are connected to the steel columns respectively.

[0027] Furthermore, during the hoisting of the steel beam, the included angle between the slings shall not exceed 60°; when the flange thickness of the steel beam is not greater than 16mm and the weight of the steel beam is less than 4 tons, hoisting holes shall be opened at the third division points on the side of the steel beam, and the steel beam shall be hoisted through the hoisting holes; when the flange thickness of the steel beam is not greater than 16mm and the weight of the steel beam is greater than 4 tons, lifting lugs shall be welded at the third division points on the side of the steel beam, and the steel beam shall be hoisted through the lifting lugs; when the flange thickness of the steel beam is greater than 16mm, lifting lugs shall be welded at the third division points on the side of the steel beam, and the steel beam shall be hoisted through the lifting lugs.

[0028] Furthermore, the steel beam has multiple bolt holes at both ends, and the steel column has a connecting plate with bolt holes on its side. The steel beam and the steel column are connected and fixed by bolts. During installation, the steel beam is first pre-fixed with installation bolts. The number of installation bolts is not less than 30% of the total number of bolts at the installation node and not less than two. After the steel beam is pre-fixed, the installation angle of the steel beam is corrected by jacks or hand-operated hoists. After the steel beam is corrected, the installation bolts between the steel beam and the steel column are replaced with high-strength bolts to complete the installation of the steel beam.

[0029] Furthermore, the installation steps for the steel columns and beams in each frame layer of the multi-layer single-piece wall are the same.

[0030] Based on the above technical solution, the construction method of the multi-wall system on the top floor of a high-rise building of the present invention has achieved the following technical advantages through practical application:

[0031] 1. The present invention provides a construction method for a multi-wall system on the top floor of a high-rise building, which improves the stability of the steel structure frame layer installation by first installing the intermediate frame layer and then installing the frame layers on both sides.

[0032] 2. The present invention provides a construction method for a multi-wall system on the top floor of a high-rise building. By setting a transverse connection structure between adjacent frame layers, the stress distribution of a single wall is made uniform, stress concentration is avoided, and stress residue in each frame layer is eliminated.

[0033] 3. The construction method of the multi-wall system on the top floor of a high-rise building of the present invention improves the stability of the installation of steel structure components of high-rise buildings by setting up guy ropes. At the same time, the guy ropes provide an auxiliary role in the correction of steel columns and reduce the error of steel column installation.

[0034] 4. The construction method of the multi-wall system on the top floor of a high-rise building of the present invention improves the stability and safety of steel structure installation by using high-strength bolts to connect and fix the steel structure. Attached Figure Description

[0035] Figure 1 This is a front view of a multi-layer single-wall structure in the construction method of a multi-wall system on the top floor of a high-rise building according to the present invention.

[0036] Figure 2 This is a top view of a multi-layer single-wall structure in the construction method of a multi-wall system on the top floor of a high-rise building according to the present invention.

[0037] Figure 3 This is a three-dimensional view of a multi-layer single-wall structure in the construction method of a multi-wall system on the top floor of a high-rise building according to the present invention.

[0038] Figure 4 This is a structural diagram of the steel column hoisting in the construction method of a multi-wall system on the top floor of a high-rise building according to the present invention.

[0039] Figure 5 This is a schematic diagram of the steel column installation and fixing in the construction method of a multi-wall system on the top floor of a high-rise building according to the present invention.

[0040] Figure 6 This is a schematic diagram of steel column correction measurement in the construction method of a multi-wall system on the top floor of a high-rise building according to the present invention.

[0041] Figure 7 This is a schematic diagram of the anchor bolt fixing frame in the construction method of a multi-wall system on the top floor of a high-rise building according to the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0043] Example 1, as Figure 1-7As shown, this invention pertains to a construction method for a multi-wall system on the top floor of a high-rise building. The system comprises multiple single-wall units arranged on the top floor of the building. These units include a first frame layer 1, a second frame layer 2, a third frame layer 3, a fourth frame layer 4, and a fifth frame layer 5. The single-wall units are arranged in a stepped configuration. Adjacent frame layers are connected by a transverse connection structure 11. This transverse connection structure 11 uses steel columns 7 and steel beams 9 to connect adjacent frame layers laterally. The transverse connection structure is installed after the steel columns 7 and steel beams 9 in the adjacent frame layers are installed, ensuring uniform stress distribution in the single-wall units and preventing stress concentration. Multi-layered single-panel walls are symmetrically installed on the top floor of the building. After the first frame layer 1, the second frame layer 2, the third frame layer 3, the fourth frame layer 4, and the fifth frame layer 5 are installed, a sixth frame layer 6 is installed between the fifth frame layer 5 to complete the installation of all frame layers.

[0044] Example 2, based on Example 1, describes a construction method for a multi-panel wall system. This method specifically includes the following steps:

[0045] S1, according to the installation position of the steel column 7 in the third frame layer 3, measure the installation point of the steel column 7 on the corresponding floor; and pre-embed the anchor bolt fixing frame at the measurement point;

[0046] S2, hoist steel column 7, connect and fix the bottom of steel column 7 to the pre-embedded anchor bolt fixing frame, and complete the hoisting of steel column 7 in the third frame layer 3;

[0047] S3, After the steel column 7 is installed, the hoisted steel beam 9 is installed between the steel columns 7, completing the installation of the third frame layer 3 unit;

[0048] S4. After the third frame layer 3 is installed, the steel columns 7 and steel beams 9 of the first frame layer 1 and the second frame layer 2 are hoisted in sequence. After the first frame layer 1 and the second frame layer 2 are hoisted, the fourth frame layer 4 and the fifth frame layer 5 are installed in sequence to complete the installation of the multi-layer single wall.

[0049] like Figure 7 As shown, the anchor bolt fixing frame is a grid structure. The anchor bolt fixing frame includes long bolts 101 and fixing steel plates 12. Long bolts are provided at the four corners of the fixing steel plates 12. The long bolts 101 are perpendicularly connected to the fixing steel plates 12. Two fixing steel plates 12 are arranged parallel to each other on the long bolts 101. When the anchor bolt fixing frame is pre-embedded, the fixing steel plates 12 are pre-embedded in the concrete, and the long bolts 101 protrude from the concrete.

[0050] Example 3, based on Examples 1 and 2, as follows: Figure 4-6 As shown, the steel column 7 is hoisted as follows:

[0051] S21, Pre-treatment of steel column 7: Before hoisting steel column 7, install lifting lugs at the four corners of the top of steel column 7 and place sleepers at the bottom of steel column 7;

[0052] S22, connect the lifting lugs on the steel column 7 to the hooks respectively through the slings, raise the top of the steel column 7 by 1m, and install the guy rope 8 on the top of the steel column 7;

[0053] S23, lift the steel column 7 and hoist it above the pre-embedded anchor bolt fixing frame, so that the bottom of the steel column 7 is bolted and fixed to the anchor bolt fixing frame;

[0054] S24, connect the guy rope 8 to the steel anchor ring embedded in the floor to fix the steel column 7 to the floor.

[0055] The installation of guy ropes 8 improves the stability of the steel structure components of high-rise buildings, and also provides auxiliary support for the correction of steel columns 7.

[0056] Guy ropes 8 are installed at the four corners of the upper part of the steel column 7. One end of the guy rope 8 is connected to the lifting lug, and the other end of the guy rope 8 is connected and fixed to the steel anchor ring pre-embedded in the floor. The guy rope 8 forms a 45° angle with the floor.

[0057] Before the steel column 7 is lifted, a ladder is installed on the side of the steel column 7. Construction workers use the ladder to connect and install the steel column 7 and the steel beam 9. The included angle between the slings is no more than 30°. The ladder facilitates the installation of the steel column 7 and the steel beam 9 by the construction workers. It also facilitates the removal of the lifting lugs on the steel column 7 and the steel beam 9 after the steel column 7 and the steel beam 9 are installed.

[0058] Example 4, the hoisting of the steel beam 9 is specifically as follows:

[0059] S31, steel beam 9 pretreatment, lifting lugs are installed at both ends of the side of steel beam 9;

[0060] S32, the lifting lugs on the steel beam 9 are connected to the lifting hooks respectively by slings;

[0061] S23, lift the steel beam 9 and install it between the steel columns 7, so that both ends of the steel beam 9 are connected to the steel columns 7 respectively.

[0062] When hoisting the steel beam 9, the included angle between the slings shall not exceed 60°; when the flange thickness of the steel beam 9 is not greater than 16mm and the weight of the steel beam 9 is less than 4 tons, hoisting holes shall be opened at the three equal division points on the side of the steel beam 9, and the steel beam 9 shall be hoisted through the hoisting holes; when the flange thickness of the steel beam 9 is not greater than 16mm and the weight of the steel beam 9 is greater than 4 tons, lifting lugs shall be welded at the three equal division points on the side of the steel beam 9, and the steel beam 9 shall be hoisted through the lifting lugs; when the flange thickness of the steel beam 9 is greater than 16mm, lifting lugs shall be welded at the three equal division points on the side of the steel beam 9, and the steel beam 9 shall be hoisted through the lifting lugs.

[0063] The steel beam 9 has multiple bolt holes at both ends, and the steel column 7 has a connecting plate with bolt holes on its side. The steel beam 9 and the steel column 7 are connected and fixed by bolts. During installation, the steel beam 9 is first pre-fixed with installation bolts. The number of installation bolts is not less than 30% of the total number of bolts at the installation node and not less than two. After the steel beam 9 is pre-fixed, the installation angle of the steel beam 9 is corrected by jacks or hand hoists. After the steel beam 9 is corrected, the installation bolts between the steel beam 9 and the steel column 7 are replaced with high-strength bolts to complete the installation of the steel beam 9.

[0064] Before construction, the high-strength bolt connections should be inspected and re-inspected, and only after passing the inspection can installation proceed. Bolt installation is carried out in two steps:

[0065] The first step is to hoist the steel components and fix them with temporary bolts or pins. It is strictly forbidden to use high-strength bolts as temporary bolts. The number of temporary bolts should not be less than 1 / 3 of the total number of bolts and should not be less than two.

[0066] The second step is to replace the temporary bolts with high-strength bolts and tighten them.

[0067] High-strength bolts must be tightened in two stages. The first stage is initial tightening, tightening to 50-80% of the final axial force. The second stage is final tightening, tightening to the standard preload, with a deviation of no more than ±10%. Normally, a dedicated electric wrench is used for final tightening; the bolt is considered finished when the split head comes off. For bolts that cannot be tightened with a dedicated wrench, torque-shear type high-strength bolts should be tightened using the torque method for large hexagonal head high-strength bolts. After final tightening, check for any under-tightened or missing bolts by tapping them one by one with a 0.3-0.5 kg hammer. Any under-tightened or missing bolts should be tightened further; over-tightened bolts should be replaced. During inspection, the nut should be retracted 30°-50° and then tightened back to its original position. The final tightening torque value should be measured, with a deviation of no more than ±10%. Bolts that have passed final tightening should be marked to avoid confusion. Using high-strength bolts for steel structure connections and fixation improves the stability and safety of steel structure installation.

[0068] like Figure 6As shown, during the installation and correction of steel column 7, two theodolites were set up on a control line that was 90 degrees apart and shifted 1 meter to the same direction. The theodolite operator observed the small steel ruler at the top of the column, measured the deviation of steel column 7, and directed the correction.

[0069] The installation steps for the steel columns 7 and steel beams 9 in each frame layer of the multi-layer single-piece wall are the same.

[0070] Before installing multi-layer single-panel walls, it is necessary to measure the reference points to ensure the installation accuracy of high-altitude operations;

[0071] Step 1: Using the "external control method", set up 6 main control points around the ground: establish plane measurement benchmarks and set up 6 measurement benchmarks on site;

[0072] Step 2: Based on the three main control points, determine the first-level plane control network using the traverse observation method;

[0073] Step 3: Vertical transfer of control points, starting from the foundation to the 3rd floor as the first elevation measurement benchmark, and then to the top;

[0074] Step 4: Setting out the elevation control network. This invention uses the vertical transfer method along the column with a leveling rod.

[0075] Step 5: Based on the control points obtained from the survey, use the same measurement methods as before to establish the plane control network for each floor.

[0076] By measuring benchmarks, the installation accuracy of high-altitude operations is ensured, which improves the accuracy of steel column and beam installation during the construction of the top floor of high-rise buildings and enhances the stability of installation equipment.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A construction method of a high-rise building top floor multi-piece wall system, characterized by, The application relates to a multi-piece wall system formed by a plurality of single-layer walls arranged on the top floor of a high-rise building, wherein the multi-piece wall system comprises a first frame layer, a second frame layer, a third frame layer, a fourth frame layer and a fifth frame layer, and the plurality of single-layer walls are arranged in a stepped manner. S1, measuring the installation position of a steel column on a corresponding floor according to the installation position of the steel column in the third frame layer; and pre-burying a foundation bolt fixing frame at the measuring point; S2, hoisting the steel column, connecting and fixing the bottom of the steel column with the pre-buried foundation bolt fixing frame, and completing the hoisting of the steel column in the third frame layer; The hoisting of the steel column is specifically as follows: S21, pretreating the steel column, installing lifting lugs on the four corners of the top of the steel column before hoisting the steel column, and placing sleepers on the bottom of the steel column; S22, connecting the lifting lugs on the steel column with hooks through lifting ropes, lifting the top of the steel column by 1m, and installing a cable wind rope on the top of the steel column; S23, hoisting the steel column, and hoisting the steel column to above the pre-buried foundation bolt fixing frame, so that the bottom of the steel column is bolt-connected and fixed with the foundation bolt fixing frame; S24, connecting the cable wind rope with a steel bar anchor ring pre-buried on the floor, and fixing the steel column on the floor; The four corners of the top of the steel column are all provided with cable wind ropes, one end of each cable wind rope is connected with a lifting lug, the other end of each cable wind rope is connected with a steel bar anchor ring pre-buried on the floor, and the cable wind rope forms a 45-degree angle with the floor; Before hoisting the steel column, a climbing ladder is installed on the side surface of the steel column, and a construction worker climbs the climbing ladder to connect and install the steel column and a steel beam, and the included angle between the lifting ropes is not greater than 30 degrees; S3, after the installation of the steel column is completed, hoisting a steel beam to be installed between the steel columns, and completing the installation of the third frame layer unit; S4, after the installation of the third frame layer is completed, hoisting the steel columns and the steel beams of the first frame layer and the second frame layer in sequence, hoisting the first frame layer and the second frame layer after the hoisting is completed, and then installing the fourth frame layer and the fifth frame layer in sequence, and completing the combined installation of the plurality of single-layer walls to form the multi-piece wall system of the high-rise building.

2. The construction method of a high-rise building top floor multi-piece wall system according to claim 1, characterized in that, The foundation bolt fixing frame is in the shape of a whole square frame structure, the foundation bolt fixing frame comprises long bolts and fixed steel plates, the four corners of each fixed steel plate are provided with long bolts, the long bolts are perpendicularly connected with the fixed steel plates, two fixed steel plates are arranged in parallel on each long bolt, the fixed steel plates are pre-buried in concrete when the foundation bolt fixing frame is pre-buried, and the long bolts extend out of the concrete.

3. The construction method of a multi-leaf wall system for the top floor of a high-rise building according to claim 1, characterized in that, The hoisting of the steel beam is specifically as follows: S31, pretreating the steel beam, and installing lifting lugs on the two ends of the side surface of the steel beam; S32, connecting the lifting lugs on the steel beam with hooks through lifting ropes; S23, hoisting the steel beam, and hoisting the steel beam to be installed between the steel columns, so that the two ends of the steel beam are connected with the steel columns.

4. The construction method of a multi-leaf wall system for the top floor of a high-rise building according to claim 3, wherein The included angle between the lifting ropes is not greater than 60° when the steel beam is hoisted; when the flange thickness of the steel beam is not greater than 16 mm and the mass of the steel beam is less than 4 tons, lifting holes are formed at the three-equal-division points of the side surface of the steel beam, and the steel beam is hoisted through the lifting holes; when the flange thickness of the steel beam is not greater than 16 mm and the mass of the steel beam is greater than 4 tons, lifting lugs are welded at the three-equal-division points of the side surface of the steel beam, and the steel beam is hoisted through the lifting lugs; when the flange thickness of the steel beam is greater than 16 mm, lifting lugs are welded at the three-equal-division points of the side surface of the steel beam, and the steel beam is hoisted through the lifting lugs.

5. The construction method of a multi-leaf wall system for the top floor of a high-rise building according to claim 3, wherein The steel beam is provided with a plurality of bolt holes at two ends, and the steel column is provided with a connecting plate on the side surface, and the connecting plate is provided with bolt holes; the steel beam and the steel column are connected and fixed through bolts; when the steel beam is installed, it is first pre-fixed through installation bolts, the number of installation bolts is not less than 30% of the total number of bolts at the installation joint and not less than two, after the pre-fixing of the steel beam is completed, the installation angle of the steel beam is corrected through a jack or a hand-operated hoist, after the correction of the steel beam is completed, the installation bolts between the steel beam and the steel column are replaced with high-strength bolts, and the installation of the steel beam is completed.

6. The construction method of a high-rise building top floor multi-piece wall system according to claim 1, characterized in that, The steel column and the steel beam of each frame layer in the multi-layer single-wall wall body are installed in the same way.

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