A UHPC curtain wall system based on three-dimensional adjustment and a construction method thereof

Abstract

The application discloses a UHPC curtain wall system based on three-dimensional adjustment and a construction method thereof, and relates to the technical field of building decoration construction.The system comprises a prefabricated base keel system and a UHPC curtain wall plate, first supports and second supports are arranged on the prefabricated base keel system at intervals, and a U-shaped groove is fixedly arranged on the second support; the UHPC curtain wall plate comprises a UHPC panel and a back-attached steel frame, the lower part of the back-attached steel frame is embedded in the U-shaped groove, the upper part of the back-attached steel frame is placed on the first support and is fixedly connected through a fastening bolt group; a horizontal adjusting hole is formed in the back-attached steel frame, a support strip-shaped hole is formed in the first support, and the fastening bolt group is arranged in the two holes; an adjusting top rod is further arranged on the back-attached steel frame and abuts against the first support; and adjusting bolts are arranged on the two sides of the U-shaped groove.The three-dimensional step-by-step independent adjustment of the UHPC curtain wall plate in the left-right direction, the up-down direction and the in-out direction is realized through the cooperation of the fastening bolt group, the adjusting top rod and the adjusting bolts, the adjusting precision is high, the operation is convenient, the welding-free assembly construction is realized, the steel consumption and the construction difficulty are significantly reduced, and the system is suitable for various building curtain wall projects.

Description

Technical Field

[0001] This invention relates to the field of building decoration construction technology, and more specifically, to a UHPC curtain wall system based on three-dimensional adjustment and its construction method. Background Technology

[0002] Ultra-High Performance Concrete (UHPC), a cement-based composite material with ultra-high strength, excellent toughness, and outstanding plasticity, has shown increasingly broad application prospects in the field of building curtain wall decoration in recent years. However, the engineering application of UHPC curtain wall panels is still in its early stages of development, and on-site construction lacks mature technical experience and systematic standard guidance.

[0003] Currently, the installation of UHPC curtain walls commonly employs the keel fixing method. This involves first performing high-altitude welding and assembly on-site to form a keel framework, and then rigidly fixing the curtain wall panels to the keel. This method involves a large number of high-altitude welding operations, which is not only difficult to construct, but also significantly affected by human factors and environmental conditions, making it difficult to guarantee stability and consistency in welding quality. Another common method is the embedded part fixing method, which directly anchors the UHPC panels to the concrete structural members using pre-embedded parts. This method places stringent requirements on the positioning accuracy of the embedded parts, the drilling and cleaning process, and the load-bearing capacity testing; deviations in any of these steps can lead to connection failure. Both of these construction methods suffer from significant problems such as cumbersome construction processes and difficulty in controlling installation accuracy. If there is a deviation in the positioning of the embedded parts or an error in the keel welding, it will directly affect the spatial positioning accuracy of the UHPC curtain wall in three dimensions: front and back (horizontal), left and right (horizontal), and up and down (vertical), thus affecting the design of the building facade and the overall installation quality. Therefore, there is an urgent need to develop a new UHPC curtain wall construction method that is easy to install and flexible to adjust.

[0004] In the prior art, a three-dimensional adjustable column-mounted UHPC curtain wall structure is known (Chinese Utility Model Patent CN220814433 U), which mainly includes a frame structure, an adjustment structure, and curtain wall panels. The curtain wall panels are installed on the frame structure through the adjustment structure. The frame structure specifically includes an outer frame and an inner frame arranged in inner and outer layers, with the outer frame fixedly installed on the inner frame. The adjustment structure includes a first adjustment component and a second adjustment component. The first adjustment component is disposed on the outer frame, and one end of the second adjustment component is connected to the first adjustment component, while the other end is connected to the curtain wall panel. According to the patent specification, its adjustment structure adopts a butt-joint construction, aiming to improve the butt joint accuracy and ease of operation, and to form a prefabricated installation system with the frame structure, in order to improve the installation efficiency and accuracy of the UHPC curtain wall, overcome the defects of traditional loose assembly operations, and realize the rapid assembly of large-size curtain wall panels.

[0005] Although the technical solution disclosed in CN220814433U has solved some of the installation problems of UHPC curtain walls to a certain extent, analysis shows that it still has the following obvious shortcomings:

[0006] 1) The adjustment system is complex and its application is limited: The adjustment structure of this patent relies on specific connecting parts between the curtain wall panel and the frame to achieve three-dimensional adjustment. The adjustment operation must be carried out on the back of the panel, which has great spatial limitations and is not applicable to all types of curtain wall projects.

[0007] 2) Limited vertical adjustment range and lack of standard parts: The vertical adjustment range of the curtain wall panel in this patent is strictly limited by the geometric dimensions of the pre-designed first and second adjustment parts, with a small adjustment margin, making it difficult to meet the adjustment requirements under large deviation conditions. At the same time, its F-type and U-type adjustment parts are not standard profiles and need to be custom-made with separate molds, resulting in high production costs and long production cycles.

[0008] 3) The double-layer frame system leads to increased steel consumption: The patent adopts an inner and outer double-layer frame structure, which enhances the overall rigidity of the system, but also significantly increases the amount of steel used, which contradicts the UHPC curtain wall's design goal of pursuing lightweighting and increases the project cost.

[0009] 4) Limited adjustment space: Its adjustment structure is sandwiched between the curtain wall panel and the frame. When the size of the curtain wall panel is large, the operating space behind the panel is extremely limited, making it difficult for construction personnel to make accurate adjustments, which greatly affects the convenience of construction and installation efficiency.

[0010] 5) Failure to completely achieve welding-free construction: The internal and external frame components (columns, beams, etc.) of this patent may still have welding connection nodes during the prefabrication and assembly process, making it impossible to completely avoid welding operations from a technological perspective. The safety risks and quality hazards of high-altitude welding still exist.

[0011] 6) Insufficient temperature deformation coordination: The plug-in and bolt connection method of this patent is relatively rigid. Under the thermal expansion and contraction deformation of the curtain wall panel caused by temperature changes, the connection node may generate a large additional stress. Under long-term action, there is a risk of connection loosening or panel cracking.

[0012] The information disclosed in this background section is intended only to help understand the overall technical background of the present invention and should not be construed as an admission or implication that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0013] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention provides a UHPC curtain wall system based on three-dimensional adjustment and its construction method, which enables independent and precise adjustment of the three-dimensional spatial position of the curtain wall panels, significantly simplifies on-site construction procedures, and reduces steel consumption, thereby overcoming the shortcomings of existing technologies such as low installation accuracy, complex adjustment, and large steel consumption.

[0014] This invention provides a UHPC curtain wall system based on three-dimensional adjustment, comprising:

[0015] A prefabricated base keel system, wherein a first support and a second support are fixedly provided at intervals along the vertical direction, and a U-shaped groove is fixedly provided on the second support;

[0016] And UHPC curtain wall panels, the UHPC curtain wall panels including UHPC panels and back steel frames, the back steel frames being integrally fixed to the back of the UHPC panels;

[0017] Each UHPC curtain wall panel corresponds to a set of first supports and second supports. The lower part of the backing steel frame is embedded in the U-shaped groove of the second support, and the upper part of the backing steel frame is placed on the first support and fixedly connected to the first support by a set of fastening bolts.

[0018] The upper part of the back steel frame is provided with a lateral adjustment hole extending in the left and right direction, and the first support is provided with a support strip hole extending in the in and out direction. The fastening bolt group passes through the support strip hole and the lateral adjustment hole to adjust the in and out position of the upper part of the UHPC curtain wall panel and the overall left and right position.

[0019] The backing steel frame is also provided with an adjusting top rod, which passes through the backing steel frame and abuts against the first support. The UHPC curtain wall panel can be adjusted vertically by turning the adjusting top rod.

[0020] The second support has symmetrical bolt holes on both sides of the U-shaped groove. Each bolt hole is fitted with an adjusting bolt. The end of the adjusting bolt abuts against the side wall of the back steel frame. The position adjustment of the lower part of the UHPC curtain wall panel can be achieved by turning the adjusting bolt.

[0021] In some embodiments, the fastening bolt group is fixedly connected to the back steel frame, and the fastening bolts of the fastening bolt group pass through the support strip hole and the transverse adjustment hole in sequence and are connected to the nut; the adjusting top rod passes through the back steel frame and presses against the side wall or bottom surface of the first support.

[0022] In some embodiments, the upper part of the UHPC curtain wall panel can be adjusted by adjusting the position of the fastening bolt group in the support strip hole; the left and right position of the UHPC curtain wall panel can be adjusted by moving the back steel frame to change the left and right relative position of its lateral adjustment hole and the internal fastening bolt group.

[0023] In some embodiments, a lateral adjustment gap is provided between the ends of two adjacent back-mounted steel frames to provide operating space for left and right position adjustment.

[0024] In some embodiments, a pair of bolt holes symmetrically opened on both sides of the U-shaped groove are respectively provided with adjusting bolts, and the two adjusting bolts respectively abut against both sides of the backing steel frame. By simultaneously turning the two adjusting bolts, the position of the backing steel frame in the in-and-out direction is changed, thereby realizing the adjustment of the in-and-out position of the lower part of the UHPC curtain wall panel.

[0025] In some embodiments, the prefabricated base keel system is assembled from hot-dip galvanized steel square tubes, including an inner main keel, an outer main keel and connecting diagonal braces, which are spliced ​​together to form a stable frame structure.

[0026] In some embodiments, both the first support and the second support are made of galvanized angle steel and are welded and fixed to the outside of the prefabricated base keel system; a vertical reserved adjustment gap is provided between the bottom of the U-shaped groove of the second support and the lower end of the back steel frame to provide a margin for vertical adjustment and avoid rigid contact friction.

[0027] This invention also provides a UHPC curtain wall construction method based on three-dimensional adjustment, comprising the following steps:

[0028] S100. Prefabricate each component of the UHPC curtain wall system based on three-dimensional adjustment as described in any of the above technical solutions;

[0029] S200. Using the UHPC curtain wall system based on three-dimensional adjustment, the UHPC curtain wall panel is adjusted in three dimensions: left and right position adjustment, up and down position adjustment and in-and-out position adjustment are performed in sequence to complete the precise positioning of the curtain wall panel in three dimensions; the three-dimensional adjustment is achieved by step-by-step independent adjustment through the cooperation of the horizontal adjustment hole on the back steel frame, the support strip hole on the first support, the fastening bolt group, the adjustment top rod and the adjustment bolt on the U-shaped groove of the second support.

[0030] In some embodiments, in step S200,

[0031] The left and right position adjustment is achieved by moving the back steel frame so that the lateral adjustment hole relative to the fastening bolt group changes its left and right position, and the adjustment margin is provided by the lateral reserved adjustment gap between adjacent back steel frames.

[0032] The vertical adjustment is achieved by rotating the adjusting rod, which extends or retracts relative to the first support, thereby moving the UHPC curtain wall panel up and down. At the same time, the vertical adjustment gap provides vertical adjustment margin.

[0033] The in-and-out adjustment includes an upper in-and-out adjustment and a lower in-and-out adjustment. The upper in-and-out adjustment is achieved by adjusting the in-and-out position of the fastening bolt group in the support strip hole, and the lower in-and-out adjustment is achieved by simultaneously adjusting the screw-in depth of the adjusting bolts on both sides of the U-shaped groove.

[0034] In some embodiments, step S100 includes:

[0035] S110. Construction preparation and detailed design: Use BIM software for detailed design, determine the fixed positions of the first support, the second support and the U-shaped channel and the layout of the UHPC panel, select materials and inspect them upon arrival at the site.

[0036] S120, Fabrication of prefabricated base keel system:

[0037] Based on the detailed processing drawings, the main and secondary keels are cut and pre-treated, and then assembled and welded on a special jig to form a prefabricated base keel system.

[0038] The flatness of the assembled prefabricated base keel system is checked, and any welded deformation is corrected.

[0039] The prefabricated base keel system is hoisted to the installation position and placed in place. The transition parts are welded and fastened, and the verticality, flatness and elevation are checked.

[0040] S130. Install the first support, the second support and the U-shaped channel: Weld the first support and the second support to the prefabricated base keel system according to the design position, and then weld and fix the U-shaped channel to the second support.

[0041] S140. Fabrication of UHPC curtain wall panels: Integrate the UHPC panels and the backing steel frame into one piece in the factory, and pre-set horizontal adjustment holes and install adjustment top rods on the backing steel frame.

[0042] S150. Install UHPC curtain wall panels: Hoist the UHPC curtain wall panels into place, so that the lower part of the back steel frame is placed in the U-shaped groove of the second support and the upper part is placed on the first support. Insert the fastening bolt group and adjusting rod for initial fixation.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The structure is simplified, and the amount of steel used is significantly reduced. This invention adopts a pre-assembled base keel scheme, abandoning the traditional double-layer frame structure. The keel components can be prefabricated in the factory and hoisted on site as a whole. This not only greatly simplifies the curtain wall support system and reduces the amount of steel used, helping to reduce the overall project cost, but also ensures the installation accuracy of the keel from the source and improves the reliability of the overall structure.

[0045] The innovative three-dimensional adjustment mechanism offers convenient operation and controllable precision. This invention utilizes a combination structure of "support + U-groove + bolt" to achieve three-dimensional, step-by-step adjustment of UHPC curtain wall panels. This shifts the operation point from the narrow space behind the panel to a more open area, significantly reducing operational difficulty and making it particularly suitable for the installation of large-size curtain wall panels.

[0046] This invention enables prefabricated construction without on-site welding or high-altitude welding, ensuring high safety and quality reliability. The core components are integrated with the UHPC panel in the factory. On-site, the prefabricated backing steel frame is simply hoisted onto the pre-assembled keel and fixed with bolts and other fasteners, completely avoiding high-altitude welding operations. This significantly reduces safety risks and eliminates the potential for inconsistent welding quality.

[0047] Three-dimensional step-by-step adjustment ensures high controllability of installation accuracy. This invention decomposes three-dimensional adjustment into three independent and orderly adjustment steps: left and right, in and out, and up and down. Each dimension does not interfere with the others, avoiding coupling errors in traditional integrated adjustment, and ultimately achieving a high standard of installation accuracy control of ≤2mm.

[0048] Excellent temperature deformation adaptability enhances system durability. In this invention, the lower part of the back-mounted steel frame is embedded in a U-shaped groove, and the upper part is connected to the support by bolts. This connection structure provides the necessary displacement margin for the thermal expansion and contraction deformation of the curtain wall panel caused by temperature changes, effectively releasing temperature stress and avoiding additional loads at the joints.

[0049] The components are standardized, low-cost, and highly applicable. The U-shaped channels, L-shaped supports, and square steel used in this invention are all common standard profiles, widely available and inexpensive, requiring no separate mold customization. Furthermore, continuous stepless adjustment is achieved through bolt tightening, with a large adjustment range, which can flexibly adapt to installation deviations under different working conditions.

[0050] Construction efficiency is significantly improved, and the construction period is significantly shortened. This invention adopts a "factory prefabrication and on-site assembly" construction mode, which greatly reduces the amount of on-site wet work and welding work. Taking a typical 10,000-square-meter exterior wall project as an example, the overall construction period can be shortened by 40% to 60% compared with traditional processes after adopting this system.

[0051] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0052] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0053] Figure 1 A schematic diagram of the overall installation structure of the UHPC curtain wall system based on three-dimensional adjustment provided in an embodiment of the present invention;

[0054] Figure 2 for Figure 1 A partial structural diagram;

[0055] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0056] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0057] Figure 5 for Figure 1 A top-view structural diagram;

[0058] Figure 6 for Figure 5 A partial structural diagram;

[0059] Figure 7 A schematic diagram of the back structure of the UHPC curtain wall panel in a three-dimensional adjustment-based UHPC curtain wall system provided in an embodiment of the present invention;

[0060] Figure 8 for Figure 7 A schematic diagram of the side view structure;

[0061] Figure 9 for Figure 7 A top-view structural diagram.

[0062] Meaning of the labels in the attached diagram:

[0063] 1- Prefabricated base keel system;

[0064] 11-First support;

[0065] 111-Support strip hole;

[0066] 12-Second support;

[0067] 121-U-shaped groove; 1211-bolt hole; 1212-vertical reserved adjustment gap;

[0068] 122 - Adjusting bolt;

[0069] 13-Fastening bolt assembly;

[0070] 14-Adjusting rod;

[0071] 2-UHPC curtain wall panel;

[0072] 21-UHPC panel;

[0073] 22-Back steel frame;

[0074] 221 - Lateral adjustment hole;

[0075] 222 - Lateral adjustment clearance is reserved;

[0076] 223 - Adhesive disc;

[0077] 224- Anchor Bolt. Detailed Implementation

[0078] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0079] In the description of this invention, the terms "upper," "lower," "top," "bottom," "inner," "outer," "longitudinal," and "lateral," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0080] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," "setup," "insertion," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] Figure 1 This is a schematic diagram of the overall installation structure of a UHPC curtain wall system based on three-dimensional adjustment in one embodiment of the present invention. Figure 1As shown, the present invention provides a UHPC curtain wall system based on three-dimensional adjustment, mainly comprising two parts: a prefabricated base keel system 1 and UHPC curtain wall panels 2. The prefabricated base keel system 1 serves as the supporting framework for the entire curtain wall system and is fixedly installed on the main building structure. The UHPC curtain wall panels 2 consist of multiple panels, which are arranged sequentially along the vertical and horizontal directions on the outside of the prefabricated base keel system 1 to form the exterior facade decorative layer of the building.

[0082] Figure 2 for Figure 1 A schematic diagram of a local structure. (For example...) Figure 2 As shown, the prefabricated base keel system 1 is assembled from hot-dip galvanized steel square tubes, including inner main keels, outer main keels, and connecting diagonal braces, which are spliced ​​together to form a stable frame structure. Specifically, the inner and outer main keels are arranged at intervals along the thickness direction of the curtain wall, and the connecting diagonal braces are set between them and fixedly connected to the inner and outer main keels respectively, thus forming an overall load-bearing skeleton with a lattice-like cross-section. This ensures the structural strength and wind pressure resistance of the keel system while effectively controlling the amount of steel used, reducing it by at least 30%. After each keel component is cut, drilled, and pre-treated with galvanized anti-corrosion coating according to the detailed design drawings in the factory, it is assembled and welded on a special jig to form the prefabricated base keel system 1. After the prefabricated base keel system 1 is assembled as a whole in the factory, it is transported to the construction site and fixedly connected to the main building structure through adapters. The prefabricated base keel system 1 is fixedly provided with a first support 11 and a second support 12 at intervals along the vertical direction, and a U-shaped groove 121 is fixedly provided on the second support 12.

[0083] Reference Figure 2 Specifically, the first support 11 and the second support 12 are both made of galvanized angle steel and are welded and fixed to the outside of the prefabricated base keel system 1. Each UHPC curtain wall panel 2 corresponds to a set of first supports 11 and second supports 12 in the vertical direction, with the first support 11 located above and the second support 12 located below. The first support 11 is used to support the upper part of the UHPC curtain wall panel 2, and the second support 12 is used to support the lower part of the UHPC curtain wall panel 2.

[0084] Figure 7 This is a schematic diagram of the back structure of a UHPC curtain wall panel in a three-dimensional adjustment-based UHPC curtain wall system according to one embodiment of the present invention. Figure 8 for Figure 7 A schematic diagram of the side view structure; Figure 9 for Figure 7 A top-view structural diagram. (See diagram below.) Figures 7 to 9As shown, the UHPC curtain wall panel 2 includes a UHPC panel 21 and a backing steel frame 22, which is integrally fixed to the back of the UHPC panel 21. The backing steel frame 22 is fixed to the UHPC panel 21 as follows: during the prefabrication of the UHPC panel 21, anchor rods 224 are pre-embedded inside the UHPC panel 21. The outer end of the anchor rod 224 is provided with an adhesive plate 223. The backing steel frame 22 is fixedly connected to the anchor rod 224 through the adhesive plate 223, thereby achieving the integrated construction of the backing steel frame 22 and the UHPC panel 21. This integrated construction process is completed in the factory, ensuring the connection strength and positioning accuracy between the backing steel frame 22 and the UHPC panel 21.

[0085] Figure 3 for Figure 2 A schematic cross-sectional view of section AA. (Refer to...) Figure 3 The supporting steel frame 22 is a steel frame structure with a horizontal adjustment hole 221 extending in the left-right direction on its upper part. The horizontal adjustment hole 221 is an oblong or elongated hole, and its length direction is set in the left-right direction to provide a range of motion for the left-right adjustment of the UHPC curtain wall panel 2. The supporting steel frame 22 is also fixedly connected with the nuts of the fastening bolt group 13. The fastening bolts of the fastening bolt group 13 pass through the support strip hole 111 and the horizontal adjustment hole 221 in sequence and are connected to the nuts. In addition, the supporting steel frame 22 is also provided with an adjusting rod 14. The adjusting rod 14 passes through the supporting steel frame 22 and abuts against the side wall or bottom surface of the first support 11. The vertical adjustment of the UHPC curtain wall panel 2 is achieved by turning the adjusting rod 14.

[0086] Also refer to Figure 3 A lateral adjustment gap 222 is provided between the ends of two adjacent back-mounted steel frames 22 to provide operating space for left and right position adjustment. The size of this lateral adjustment gap 222 is determined according to the curtain wall design temperature deformation and installation deviation requirements, for example, 20mm.

[0087] like Figure 3 As shown, and in combination Figure 2 The upper part of the backing steel frame 22 of the UHPC curtain wall panel 2 is placed on the first support 11. The first support 11 is made of galvanized angle steel, with its horizontal legs facing upwards, and is used to support the upper end of the backing steel frame 22. The horizontal legs of the first support 11 have support strip holes 111 extending along the in-out direction. The support strip holes 111 are oblong holes or elongated strip holes, and their length direction is set along the in-out direction (i.e., the horizontal front-back direction), providing a range of motion for the in-out adjustment of the upper part of the UHPC curtain wall panel 2.

[0088] The fastening bolt assembly 13 passes sequentially through the support strip hole 111 and the lateral adjustment hole 221 in the vertical direction, and is locked with the nut fixedly connected to the back steel frame 22. The fastening bolt assembly 13 includes fastening bolts and nuts, wherein the nut is pre-fixed on the back steel frame 22, and the fastening bolt passes sequentially through the support strip hole 111 and the lateral adjustment hole 221 from top to bottom before being screwed into the nut and tightened.

[0089] The position of the upper part of the UHPC curtain wall panel 2 can be adjusted by adjusting the position of the fastening bolt assembly 13 within the support strip hole 111. Specifically, when the position needs to be adjusted, loosen the fastening bolt assembly 13, move the fastening bolts to the desired position along the direction of movement of the support strip hole 111, and then tighten the fastening bolt assembly 13 again, thereby changing the position of the upper part of the back steel frame 22 relative to the first support 11 in the direction of movement.

[0090] By moving the back steel frame to change the relative left and right positions of the horizontal adjustment hole 221 and the fastening bolt group 13, the left and right positions of the UHPC curtain wall panel 2 can be adjusted. Specifically, when it is necessary to adjust the left and right position, loosen the fastening bolt group 13, move the fastening bolts to the desired position along the left and right direction of the horizontal adjustment hole 221, and then tighten the fastening bolt group 13 again, thereby changing the position of the entire UHPC curtain wall panel 2 in the left and right direction.

[0091] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure at point BB. (See diagram below.) Figure 4 As shown, and in combination Figure 3 The adjusting rod 14 passes through the upper part of the backing steel frame 22 and abuts against the side wall or bottom surface of the first support 11. The adjusting rod 14 is preferably a bolt-type rod, with external threads on its outer periphery that mate with threaded holes on the backing steel frame 22. By turning the adjusting rod 14, it extends or retracts relative to the backing steel frame 22, with its end abutting against the first support 11, thereby causing the backing steel frame 22 to move up and down relative to the first support 11, achieving vertical adjustment of the UHPC curtain wall panel 2. A vertically reserved adjustment gap 1212 provides allowance for vertical adjustment, avoiding rigid contact friction between the backing steel frame 22 and the bottom of the U-shaped groove 121.

[0092] Reference Figure 3 and Figure 2 The lower part of the supporting steel frame 22 is embedded in the U-shaped groove 121 of the second support 12. The second support 12 is made of galvanized angle steel, with its horizontal leg facing upwards. The U-shaped groove 121 is welded and fixed to the horizontal leg of the second support 12. The U-shaped groove 121 is a channel steel piece with a U-shaped cross-section, with its opening facing upwards. The lower end of the supporting steel frame 22 is inserted into the groove of the U-shaped groove 121.

[0093] Figure 5 for Figure 1 A top-view structural diagram; Figure 6 for Figure 5 A schematic diagram of a local structure. (For example...) Figure 5 and Figure 6 As shown, and in combination Figure 2 The U-shaped groove 121 has symmetrical bolt holes 1211 on both sides, and an adjusting bolt 122 is inserted into each bolt hole 1211. Two adjusting bolts 122 are inserted into the bolt holes 1211 from the outside of the two sides of the U-shaped groove 121, with their ends abutting against the two sides of the supporting steel frame 22 after passing through the bolt holes 1211. The adjusting bolts 122 are preferably hexagonal head bolts or socket head cap screws, and their outer circumference has external threads that mate with the internal threads of the bolt holes 1211.

[0094] Reference Figure 6 The lower part of the UHPC curtain wall panel 2 can be adjusted for its in-and-out position by synchronously or asynchronously turning the two adjusting bolts 122 on both sides of the U-shaped groove 121. Specifically, when it is necessary to adjust the lower in-and-out position, loosen or tighten the adjusting bolts 122 on both sides, so that the ends of the two adjusting bolts 122 push or release the side walls of the back steel frame 22 respectively, thereby changing the in-and-out direction position of the lower part of the back steel frame 22 in the U-shaped groove 121. The screwing depth of the adjusting bolts 122 on both sides should be kept as synchronous as possible to ensure that the lower part of the back steel frame 22 is centered in the U-shaped groove 121 and does not become skewed.

[0095] Reference Figure 2 The width of the U-shaped groove 121 is slightly larger than the thickness of the supporting steel frame 22, providing room for adjustment of the lower part of the supporting steel frame 22 in the inward and outward directions. A vertically reserved adjustment gap 1212 is provided between the bottom of the U-shaped groove 121 of the second support 12 and the lower end of the supporting steel frame 22 to provide leeway for vertical adjustment and avoid rigid contact friction. The size of the vertically reserved adjustment gap 1212 is determined according to the temperature deformation of the curtain wall design and the vertical adjustment requirements, for example, 15mm.

[0096] Reference Figures 1-6 In the UHPC curtain wall construction method based on three-dimensional adjustment provided by the present invention, the three-dimensional adjustment of the UHPC curtain wall panel 2 is carried out in the order of left-right position adjustment, up-down position adjustment and in-and-out position adjustment, and the adjustment of each dimension is independent of each other and does not interfere with each other.

[0097] 1. Left and right position adjustment

[0098] The left-right adjustment is achieved by moving the backing steel frame 22, causing the lateral adjustment hole 221 to change its position relative to the fastening bolt group 13. Specifically, loosen the fastening bolt group 13, push the backing steel frame (along with the UHPC curtain wall panel 2) left-right, causing the lateral adjustment hole 221 to shift relative to the fastening bolt group 13. After the panel is adjusted to the correct position, retighten the fastening bolt group 13. The pre-reserved lateral adjustment gap 222 between adjacent backing steel frames 22 provides adjustment margin for the left-right adjustment, ensuring that adjacent curtain wall panels will not collide or interfere during adjustment. This adjustment process does not require removing the already installed adjacent UHPC curtain wall panels 2, making the operation simple and quick.

[0099] 2. Upper and lower position adjustment

[0100] The vertical adjustment is achieved by turning the adjusting rod 14. Specifically, a wrench or similar tool is used to turn the adjusting rod 14, causing it to extend or retract relative to the supporting steel frame 22. Since the end of the adjusting rod 14 abuts against the first support 11, when the adjusting rod 14 extends, its end pushes against the first support 11, and the reaction force causes the supporting steel frame 22 to move upwards; when the adjusting rod 14 retracts, the supporting steel frame 22 moves downwards under its own weight. Through this method, the precise vertical position of the UHPC curtain wall panel 2 is achieved. The vertical adjustment gap 1212 provides vertical adjustment margin for vertical adjustment, while avoiding frictional resistance caused by direct contact between the lower end of the supporting steel frame 22 and the bottom of the U-shaped groove 121.

[0101] 3. In / out position adjustment

[0102] The position adjustment consists of two parts: the upper position adjustment and the lower position adjustment. The two parts can be operated independently.

[0103] The upper part's in-and-out position adjustment is achieved by adjusting the in-and-out position of the fastening bolt group 13 within the support strip hole 111. The specific operation is as follows: loosen the fastening bolt group 13, move the fastening bolt along the in-and-out direction of the support strip hole 111, causing the upper part of the back steel frame 22 to move in the in-and-out direction. When it moves to the desired position, tighten the fastening bolt group 13 again.

[0104] The lower in-and-out position adjustment is achieved by simultaneously adjusting the screw depth of the adjusting bolts 122 on both sides of the U-shaped groove 121. Specifically, using a wrench or similar tool, the two adjusting bolts 122 on both sides of the U-shaped groove 121 are simultaneously tightened, causing the ends of the two adjusting bolts 122 to push against the supporting steel frame 22 from both sides, thereby changing the position of the lower part of the supporting steel frame 22 in the in-and-out direction. The adjusting bolts 122 on both sides should be tightened synchronously to avoid the lower part of the supporting steel frame 22 becoming misaligned within the U-shaped groove 121.

[0105] Through the above-mentioned step-by-step independent adjustments, the three-dimensional spatial position of the UHPC curtain wall panel 2 can be precisely adjusted to the design coordinates, and the installation accuracy can be controlled within ±2mm.

[0106] The following reference Figures 1 to 9 The UHPC curtain wall construction method based on three-dimensional adjustment provided by this invention will be described in detail with reference to specific construction steps.

[0107] S110, Construction Preparation and Detailed Design

[0108] BIM software was used for detailed design. Based on the building facade design and curtain wall segmentation requirements, the layout scheme of the prefabricated base keel system 1, the fixing positions of the first support 11 and the second support 12, and the segmentation layout of the UHPC panels 21 were determined. Clash detection was performed using the BIM model to ensure no spatial interference between components. Based on the detailed design results, materials were selected and inspected on site. Materials included hot-dip galvanized steel square tubes, galvanized angle steel, U-shaped channel steel, fastening bolt sets 13, adjusting rods 14, adjusting bolts 122, and UHPC prefabricated panels.

[0109] S120, Fabrication of prefabricated base keel system

[0110] Based on the detailed processing drawings, the main and secondary keel sections are cut and pre-treated. Hot-dip galvanized steel square tubes are used as the keel material, cut to the design dimensions, and the cut ends are ground and deburred. Holes are drilled at predetermined locations. Assembly and welding are completed on a dedicated jig to form the prefabricated base keel system. Welding deformation is strictly controlled during welding to ensure the dimensional accuracy of the prefabricated base keel system. The flatness of the assembled prefabricated base keel system is checked, and any weld deformation is corrected using mechanical straightening or flame straightening. The corrected prefabricated base keel system is hoisted to the installation position, and the transition parts are welded and tightened to fix the prefabricated base keel system to the main building structure. The verticality, flatness, and elevation of the prefabricated base keel system are checked to ensure that all indicators meet the design requirements.

[0111] More specifically, the hoisting and installation process of the prefabricated base keel system can be as follows: The properly aligned prefabricated base keel system is transported to the hoisting position by four people using a flatbed cart. After being hoisted into place by a crane, it is slowly lowered. Indoor personnel assist in fitting the lower part of the frame into the pre-embedded inserts. Immediately after the lower part is in place, the upper part is welded. The hoisting straps can only be removed after confirming a secure connection. The adapter uses 12.6# galvanized channel steel. First, one side of the adapter is welded to the embedded part, and the verticality and positioning are checked. A 2mm gap is left during installation to ensure the component fits in smoothly. After the frame is in place, vertical and horizontal guide lines are hung along the outer end of the adapter to check and correct the verticality, flatness, and elevation of the frame. Once all indicators meet the design requirements, the adapter is finally tightened, and the prefabricated base keel system is fixedly connected to the main building structure.

[0112] S130, Install the first support, the second support, and the U-shaped groove.

[0113] Weld the first support 11 and the second support 12 to the prefabricated base keel system 1 according to the design positions. Both the first support 11 and the second support 12 are made of galvanized angle steel. Before welding, the positions should be accurately laid out to ensure that the positional deviation of each support is within the allowable range. The first support 11 is located at the top and is used to support the upper part of the UHPC curtain wall panel 2; the second support 12 is located at the bottom and is used to support the lower part of the UHPC curtain wall panel 2. After the second support 12 is welded, the U-shaped groove 121 is welded and fixed to the horizontal leg of the second support 12. The groove opening of the U-shaped groove 121 is set upward, and its groove width should be slightly larger than the thickness of the back steel frame 22 to provide room for adjustment in position.

[0114] S140, Fabrication of UHPC Curtain Wall Panels

[0115] The UHPC panel 21 and the backing steel frame 22 are integrated into one unit at the factory. Specifically, during the prefabrication of the UHPC panel 21, anchor rods 224 are pre-embedded at designated positions inside the UHPC panel 21, with adhesive plates 223 at their outer ends. After the UHPC panel 21 is cured and formed, the backing steel frame 22 is fixedly connected to the anchor rods 224 via the adhesive plates 223. A transverse adjustment hole 221 is pre-set on the backing steel frame 22, and an adjusting rod 14 and nuts for the fastening bolt assembly 13 are installed on the backing steel frame 22. The transverse adjustment hole 221 is an elongated oval hole extending in the left-right direction, used for left-right adjustment. The adjusting rod 14 passes through the backing steel frame 22 and is threadedly connected to it. The nuts for the fastening bolt assembly 13 are fixedly welded to the backing steel frame 22, corresponding to the position of the transverse adjustment hole 221.

[0116] S150, Install UHPC curtain wall panels

[0117] The prefabricated UHPC curtain wall panel 2 is hoisted into place. Special lifting equipment is used during hoisting to ensure stable installation and avoid collisions. The lower part of the backing steel frame 22 is inserted into the U-shaped groove 121 of the second support 12, and the upper part of the backing steel frame 22 is placed on the first support 11. The fastening bolts of the fastening bolt group 13 and the adjusting rod 14 are inserted for initial fixation. At this time, the fastening bolts of the fastening bolt group 13 pass through the support strip hole 111 and the transverse adjustment hole 221 from top to bottom and are connected to the nut, but are not tightened yet. The end of the adjusting rod 14 abuts against the side wall or bottom surface of the first support 11.

[0118] S200, Three-dimensional adjustment

[0119] The UHPC curtain wall panel 2 is adjusted in three dimensions in the order of left-right adjustment, up-down adjustment, and in-and-out adjustment to achieve precise positioning of the three-dimensional position of the curtain wall panel.

[0120] Left and right position adjustment: Loosen the fastening bolt group 13, push the back steel frame (with UHPC curtain wall panel) to move left and right, so that the lateral adjustment hole 221 slides relative to the fastening bolt group 13 to the design position, and then tighten the fastening bolt group 13 again. During the adjustment process, the lateral reserved adjustment gap 222 between adjacent back steel frames 22 provides space for left and right movement.

[0121] Vertical adjustment: Use a wrench to turn the adjusting rod 14 to move the UHPC curtain wall panel 2 vertically to the design elevation. When the adjusting rod 14 extends, the supporting steel frame 22 moves upward; when the adjusting rod 14 retracts, the supporting steel frame 22 moves downward. During the adjustment process, a vertical adjustment gap 1212 is provided to allow for vertical adjustment.

[0122] In-and-out position adjustment: The upper in-and-out position adjustment is achieved by adjusting the in-and-out position of the fastening bolt group 13 in the support strip hole 111; the lower in-and-out position adjustment is achieved by simultaneously turning the screw depth of the adjusting bolts 122 on both sides of the U-shaped groove 121.

[0123] After the three-dimensional adjustment is completed, tighten and secure all fastening bolt groups 13 and adjusting bolts 122 to complete the installation of a single UHPC curtain wall panel 2. Repeat the above steps to install the remaining UHPC curtain wall panels 2 in sequence until the installation of the entire curtain wall system is completed.

[0124] The working process and principle of this invention are as follows:

[0125] During installation, the prefabricated base keel system 1 is first fixedly installed on the main building structure. Then, the UHPC curtain wall panel 2 is hoisted into place, so that the lower part of the backing steel frame 22 is embedded in the U-shaped groove 121 of the second support 12, and the upper part is placed on the first support 11. The upper part of the backing steel frame 22 is fixedly connected to the first support 11 by the fastening bolt group 13. The upper and lower positions are adjusted by the adjusting top rod 14 abutting against the first support 11, and the lower part is adjusted by the adjusting bolt 122 abutting against the side wall of the backing steel frame 22.

[0126] When the spatial position of the UHPC curtain wall panel 2 needs to be adjusted, it is adjusted independently step by step in the order of left-right position → up-down position → in-and-out position. Left-right adjustment is achieved by pushing the back steel frame, causing a change in the relative position of the horizontal adjustment hole 221 and the fastening bolt group 13. Up-down adjustment is achieved by turning the adjusting rod 14. In-and-out adjustment is achieved by adjusting the in-and-out position of the fastening bolt group 13 within the support strip hole 111 and simultaneously turning the adjusting bolts 122 on both sides of the U-shaped groove 121. Each dimension of adjustment is independent and uncoupled, allowing for precise control of the three-dimensional spatial position of the curtain wall panel.

[0127] During use, when changes in ambient temperature cause thermal expansion and contraction deformation of the UHPC curtain wall panel 2, the back steel frame 22 can freely expand and contract within the U-shaped groove 121. The vertical reserved adjustment gap 1212 and the horizontal reserved adjustment gap 222 provide sufficient displacement margin for temperature deformation, effectively releasing temperature stress, avoiding additional loads at connection nodes, and ensuring the long-term performance and durability of the system.

[0128] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A UHPC curtain wall system based on three-dimensional adjustment, characterized in that, include: A prefabricated base keel system, wherein a first support and a second support are fixedly provided at intervals along the vertical direction, and a U-shaped groove is fixedly provided on the second support; And UHPC curtain wall panels, the UHPC curtain wall panels including UHPC panels and back steel frames, the back steel frames being integrally fixed to the back of the UHPC panels; Each UHPC curtain wall panel corresponds to a set of first supports and second supports. The lower part of the backing steel frame is embedded in the U-shaped groove of the second support, and the upper part of the backing steel frame is placed on the first support and fixedly connected to the first support by a set of fastening bolts. The upper part of the back steel frame is provided with a lateral adjustment hole extending in the left and right direction, and the first support is provided with a support strip hole extending in the in and out direction. The fastening bolt group passes through the support strip hole and the lateral adjustment hole to adjust the in and out position of the upper part of the UHPC curtain wall panel and the overall left and right position. The backing steel frame is also provided with an adjusting top rod, which passes through the backing steel frame and abuts against the first support. The UHPC curtain wall panel can be adjusted vertically by turning the adjusting top rod. The second support has symmetrical bolt holes on both sides of the U-shaped groove. Each bolt hole is fitted with an adjusting bolt. The end of the adjusting bolt abuts against the side wall of the back steel frame. The position adjustment of the lower part of the UHPC curtain wall panel can be achieved by turning the adjusting bolt.

2. The UHPC curtain wall system based on three-dimensional adjustment according to claim 1, characterized in that, The fastening bolt group is fixedly connected to the back steel frame. The fastening bolts of the fastening bolt group pass through the support strip hole and the transverse adjustment hole in sequence and are connected to the nut. The adjusting top rod passes through the back steel frame and presses against the side wall or bottom surface of the first support.

3. The UHPC curtain wall system based on three-dimensional adjustment according to claim 2, characterized in that, The UHPC curtain wall panel can be adjusted by adjusting the position of the fastening bolt group in the support strip hole; the UHPC curtain wall panel can be adjusted by moving the back steel frame to change the left-right relative position of its lateral adjustment hole and the internal fastening bolt group.

4. The UHPC curtain wall system based on three-dimensional adjustment according to claim 3, characterized in that, A lateral adjustment gap is provided between the ends of two adjacent back-mounted steel frames to provide operating space for left and right position adjustment.

5. The UHPC curtain wall system based on three-dimensional adjustment according to claim 1, characterized in that, The two bolt holes symmetrically opened on both sides of the U-shaped groove are respectively fitted with adjusting bolts. The two adjusting bolts abut against the two sides of the back steel frame. By simultaneously turning the two adjusting bolts, the position of the back steel frame in the in-and-out direction is changed, thereby realizing the adjustment of the in-and-out position of the lower part of the UHPC curtain wall panel.

6. The UHPC curtain wall system based on three-dimensional adjustment according to claim 1, characterized in that, The prefabricated base keel system is assembled from hot-dip galvanized steel square tubes, including an inner main keel, an outer main keel, and connecting diagonal braces, which are spliced ​​together to form a stable frame structure.

7. The UHPC curtain wall system based on three-dimensional adjustment according to claim 5, characterized in that, Both the first support and the second support are made of galvanized angle steel and are welded and fixed to the outside of the prefabricated base keel system. A vertically reserved adjustment gap is provided between the bottom of the U-shaped groove of the second support and the lower end of the back steel frame to provide a margin for vertical adjustment and avoid rigid contact friction.

8. A UHPC curtain wall construction method based on three-dimensional adjustment, characterized in that, Includes the following steps: S100, prefabricate each component of the UHPC curtain wall system based on three-dimensional adjustment as described in any one of claims 1 to 7; S200. Using the UHPC curtain wall system based on three-dimensional adjustment, the UHPC curtain wall panel is adjusted in three dimensions: left and right position adjustment, up and down position adjustment and in-and-out position adjustment are performed in sequence to complete the precise positioning of the curtain wall panel in three dimensions; the three-dimensional adjustment is achieved by step-by-step independent adjustment through the cooperation of the horizontal adjustment hole on the back steel frame, the support strip hole on the first support, the fastening bolt group, the adjustment top rod and the adjustment bolt on the U-shaped groove of the second support.

9. The UHPC curtain wall construction method based on three-dimensional adjustment according to claim 8, characterized in that, In step S200, The left and right position adjustment is achieved by moving the back steel frame so that the lateral adjustment hole relative to the fastening bolt group changes its left and right position, and the adjustment margin is provided by the lateral reserved adjustment gap between adjacent back steel frames. The vertical adjustment is achieved by rotating the adjusting rod, which extends or retracts relative to the first support, thereby moving the UHPC curtain wall panel up and down. At the same time, the vertical adjustment gap provides vertical adjustment margin. The in-and-out adjustment includes an upper in-and-out adjustment and a lower in-and-out adjustment. The upper in-and-out adjustment is achieved by adjusting the in-and-out position of the fastening bolt group in the support strip hole, and the lower in-and-out adjustment is achieved by simultaneously adjusting the screw-in depth of the adjusting bolts on both sides of the U-shaped groove.

10. The UHPC curtain wall construction method based on three-dimensional adjustment according to claim 8, characterized in that, Step S100 includes: S110. Construction preparation and detailed design: Use BIM software for detailed design, determine the fixed positions of the first support, the second support and the U-shaped channel and the layout of the UHPC panel, select materials and inspect them upon arrival at the site. S120, Fabrication of prefabricated base keel system: Based on the detailed processing drawings, the main and secondary keels are cut and pre-treated, and then assembled and welded on a special jig to form a prefabricated base keel system. The flatness of the assembled prefabricated base keel system is checked, and any welded deformation is corrected. The prefabricated base keel system is hoisted to the installation position and placed in place. The transition parts are welded and fastened, and the verticality, flatness and elevation are checked. S130. Install the first support, the second support and the U-shaped channel: Weld the first support and the second support to the prefabricated base keel system according to the design position, and then weld and fix the U-shaped channel to the second support. S140. Fabrication of UHPC curtain wall panels: Integrate the UHPC panels and the backing steel frame into one piece in the factory, and pre-set horizontal adjustment holes and install adjustment top rods on the backing steel frame. S150. Install UHPC curtain wall panels: Hoist the UHPC curtain wall panels into place, so that the lower part of the back steel frame is placed in the U-shaped groove of the second support and the upper part is placed on the first support. Insert the fastening bolt group and adjusting rod for initial fixation.

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