Curved-section concrete double beam and construction method thereof
By using a double-beam concrete structure with curved cross-section and its construction method, combined with the use of steel formwork and wooden formwork, the problems of low construction efficiency and high cost of spatial curved concrete structures have been solved, achieving high-quality and low-cost construction results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN HUASEN ARCHITECTURAL& ENG DESIGNING CONSULTANTS CO LTD
- Filing Date
- 2023-07-21
- Publication Date
- 2026-06-05
AI Technical Summary
Spatial curved concrete structures have low construction efficiency, are difficult to control in terms of construction quality, consume a lot of construction formwork, and have high costs for double-beam concrete structures with curved cross sections, making it difficult to economically solve the problem of roof height differences.
The structure employs a double-beam concrete structure with a variable cross-section, including first and second frame columns, first and second beam structures, stirrups, and hangers. It combines steel formwork and wooden formwork, and ensures construction quality and speed through factory prefabrication and on-site assembly.
It improved construction quality and speed, reduced costs, ensured the load-bearing capacity and economy of curved concrete structures, and solved the problem of elevation differences.
Smart Images
Figure CN117569512B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of spatial concrete curved beams and construction technology, and in particular to a double concrete beam with a variable cross section and its construction method. Background Technology
[0002] With the development of technology and materials in the field of civil engineering, people have increasingly higher requirements for architectural aesthetics. Spatial curved surfaces possess extremely high architectural aesthetic and artistic value, becoming not only a hot topic for designers but also important landmark buildings. While concrete structures for spatial curved surfaces are less expensive than steel structures and offer better waterproofing and wind resistance, their construction efficiency is low, quality control is difficult, and formwork consumption is high. Therefore, the construction technology and quality of spatial curved surface concrete structures need to be improved.
[0003] Curved beams are frequently used in spatial curved surface structures, while double-beam concrete structures with variable cross-sections are less common. When the height difference between two roofs is significant at one end and relatively small at the other, using a single beam is costly and uneconomical. The inventors of this application, taking into account construction costs, propose a double-beam concrete structure with variable cross-sections. This solves the problem of roof height differences while saving costs, and the two beams work together to bear the load. Furthermore, to ensure construction quality and the accuracy of the curved surface, a construction method for the double-beam concrete structure with variable cross-sections is proposed. This method allows for the prefabrication of steel formwork in the factory and on-site assembly, and the reuse of wooden formwork, significantly improving construction quality and speed. Summary of the Invention
[0004] This invention discloses a double-beam concrete structure with curved cross-section and its construction method, which has good load-bearing capacity and cost-saving features.
[0005] In a first aspect, the present invention discloses a double-beam concrete structure with a variable cross-section, the double-beam concrete structure with a variable cross-section comprising:
[0006] First frame column;
[0007] The second frame column has its top end higher than the top end of the first frame column;
[0008] The first beam structure has one end connected to the top of the first frame column and the other end connected to the top of the second frame column.
[0009] The second beam structure is located below the first beam structure. One end of the second beam structure is connected to the first beam structure, and the other end is connected to the second frame column.
[0010] Stirrups, which are fitted onto the first beam structure and the second beam structure;
[0011] The suspension rod is fixedly connected to the stirrup;
[0012] A waterproof membrane structure is installed between the first beam structure, the second beam structure, and the second frame column.
[0013] As an optional implementation, the first beam structure includes a first beam body, a first top reinforcement bar, and a first bottom reinforcement bar. The first top reinforcement bar is located at the top of the first beam body and is fixedly connected to the first frame column and the second frame column, respectively. The first bottom reinforcement bar is located at the bottom of the first beam body and is fixedly connected to the second frame column. The first beam body is cast into the first top reinforcement bar and the first bottom reinforcement bar.
[0014] As an optional implementation, the second beam structure includes a second beam body, a second beam top reinforcement, and a second beam bottom reinforcement. The second beam bottom reinforcement is located at the bottom of the second beam body and is fixedly connected to the first frame column and the second frame column, respectively. The second beam top reinforcement is located at the top of the second beam body and is fixedly connected to the second frame column. The second beam body is cast between the second beam top reinforcement and the second beam bottom reinforcement. The waterproof membrane structure is installed between the first beam bottom reinforcement and the second beam top reinforcement.
[0015] As an optional implementation, the waterproof membrane structure includes a waterproof membrane body, vertical reinforcement bars, and horizontal reinforcement bars. The horizontal reinforcement bars and vertical reinforcement bars are arranged alternately within the waterproof membrane body, and the waterproof membrane body is cast between the bottom reinforcement bars of the first beam and the top reinforcement bars of the second beam.
[0016] As an optional implementation, the two ends of the vertical reinforcement of the waterproof membrane extend into the first beam and the second beam, respectively.
[0017] As an optional implementation, the vertical reinforcement bars of the waterproof membrane are fixedly connected to the bottom reinforcement bars of the first beam and the top reinforcement bars of the second beam, respectively.
[0018] As an optional implementation, the two ends of the stirrup extend to the first beam and the second beam respectively, and are fixedly connected to the stirrup in the regions of the first beam and the second beam.
[0019] Secondly, the present invention provides a construction method for a double-beam concrete structure with a variable cross-section, used for constructing the double-beam concrete structure with a variable cross-section as described above, the construction method comprising:
[0020] Erect the scaffolding and the bottom formwork;
[0021] The rebar tying step includes:
[0022] Above the bottom template and between the first frame column and the second frame column, a first beam top reinforcement, a first beam bottom reinforcement, a second beam top reinforcement, a second beam bottom reinforcement, vertical reinforcement of the waterproofing liner, and horizontal reinforcement of the waterproofing liner are erected. Multiple stirrups are fitted onto the first beam top reinforcement and the second beam bottom reinforcement, and hanging bars are installed on the stirrups. The first beam top reinforcement, the second beam top reinforcement, and the stirrups are used to cast and form the first beam structure; the second beam top reinforcement and the second beam bottom reinforcement are used to cast and form the second beam structure; and the vertical reinforcement and the horizontal reinforcement of the waterproofing liner are used to cast and form the waterproofing liner structure.
[0023] Template installation steps, the template installation steps include:
[0024] Install templates for casting the second beam structure: install third and fourth side templates on the bottom template, the top reinforcement of the second beam and the bottom reinforcement of the second beam are both located between the third and fourth side templates, wherein the third and fourth side templates are fixed to the bottom template;
[0025] Install flat roof formwork, the flat roof formwork includes a flat bottom formwork and a flat top formwork, fix the flat bottom formwork to the fourth side formwork, and install the flat top formwork above the flat bottom formwork;
[0026] Install templates for casting and molding the waterproof slab structure and the first beam structure: install a grooved steel mold, a first side mold, a second side mold, a curved bottom mold, and a curved top mold, wherein the grooved steel mold is located above the third side mold and fixed to the third side mold, the second side mold is located above the grooved steel mold and fixed to the grooved steel mold, the curved bottom mold is located above the second side mold and fixed to the second side mold, the first side mold is located above the flat top mold and fixed to the flat top mold, and the curved top mold is located above the first side mold and fixed to the first side mold, and the curved top mold is provided with a casting hole;
[0027] Concrete is poured into the pouring hole to form the double concrete beam with a variable cross-section.
[0028] As an optional implementation, the curved top mold, the curved bottom mold, the first side mold, and the second side mold are all steel templates; the bottommost template, the third side mold, and the fourth side mold are all wooden templates.
[0029] As an optional implementation, the construction method further includes a formwork reinforcement step before pouring concrete. The formwork reinforcement step includes: reinforcing the second side formwork and the grooved steel formwork with the first side formwork using longitudinal timbers and tie rods.
[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0031] The present invention provides a curved cross-section concrete double beam and its construction method: The first frame column and the second frame column are the main frame parts of the building. The first beam structure and the second beam structure are approximately at an angle, and the first beam structure is a curved cross-section beam. The first beam structure is located above the second beam structure, and both the first beam structure and the second beam structure are connected to the first frame column and the second frame column, respectively, that is, the first beam structure and the second beam structure are both formed by concrete on the first frame column and the second frame column. At the end near the first frame column, the first beam structure and the second beam structure are integrated, and at the end near the second frame column, the first beam structure is located above the second beam structure, and a waterproof membrane structure is set between the first beam structure and the second beam structure, which can not only play a waterproof role, but also enable the first beam structure and the second beam structure to concentrate and cooperate in bearing the force, ensuring the load-bearing capacity of the curved concrete double beam. At the "fork" position of the first beam structure and the second beam structure, the present invention provides stirrups and hanger bars. There can be multiple stirrups, all of which are wrapped around the first beam structure and the second beam structure to reduce or avoid tensile cracking of the first beam structure and the second beam structure. Fixing the stirrups and hangers further reduces or prevents cracks in the first and second beam structures at this location. This embodiment of the invention, by setting up a first beam structure, a second beam structure, and a waterproofing membrane structure, solves the height difference problem between the first and second frame columns. Furthermore, compared to using a single integral beam, the first and second beam structure provided by this invention is more economical, and the two beams work together to bear the load. The curved top formwork and grooved steel formwork ensure the construction quality of the curved surface, while the combination of steel and wooden formwork saves costs, and the easy assembly of the formwork greatly improves construction speed. Attached Figure Description
[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0033] Figure 1 This is a schematic diagram of the structure of a double-beam concrete structure with a variable cross-section disclosed in an embodiment of the present invention;
[0034] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at point AA;
[0035] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at point BB;
[0036] Figure 4 yes Figure 1Schematic diagram of the structure of the central suspension rod;
[0037] Figure 5 This is a schematic diagram of the beam formwork structure of a double-beam concrete beam with a curved cross section disclosed in an embodiment of the present invention;
[0038] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure at the CC section;
[0039] Figure 7 yes Figure 5 A three-dimensional schematic diagram of the central beam formwork structure.
[0040] Icons: 101, First Frame Column; 102, Second Frame Column; 110, First Beam Structure; 111, First Beam Body; 112, Top Reinforcement of First Beam; 113, Bottom Reinforcement of First Beam; 120, Second Beam Structure; 121, Second Beam Body; 122, Top Reinforcement of Second Beam; 123, Bottom Reinforcement of Second Beam; 130, Stirrups; 140, Hanging Reinforcement; 150, Waterproofing Board Structure; 151, Waterproofing Board Body; 152, Waterproofing Board Vertical reinforcement; 153, Horizontal reinforcement of waterproof board; 200-Support; 201, Bottom formwork; 202, Third side formwork; 203, Fourth side formwork; 204, Flat bottom formwork; 205, Flat top formwork; 206, Grooved steel formwork; 207, First side formwork; 208, Second side formwork; 209, Curved bottom formwork; 210, Curved top formwork; 211, Pouring hole; 301, Reinforcing longitudinal timber; 302, Through bolt. Detailed Implementation
[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0042] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.
[0043] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.
[0044] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.
[0045] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.
[0046] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.
[0047] Please see Figure 1 This invention provides a double-beam concrete structure with a variable cross-section. This double-beam concrete structure with a variable cross-section has good load-bearing capacity and is cost-effective.
[0048] like Figures 1 to 4 As shown, in this embodiment of the invention, the curved cross-section concrete double beam structure includes: a first frame column 101; a second frame column 102, the top of the second frame column 102 being higher than the top of the first frame column 101; a first beam structure 110, one end of the first beam structure 110 being connected to the top of the first frame column 101, and the other end being connected to the top of the second frame column 102; a second beam structure 120, located below the first beam structure 110, one end of the second beam structure 120 being connected to the first beam structure 110, and the other end being connected to the second frame column 102; stirrups 130, the stirrups 130 being fitted around the first beam structure 110 and the second beam structure 120; hanger bars 140, the hanger bars 140 being fixedly connected to the stirrups 130; and a waterproof membrane structure 150, the waterproof membrane structure 150 being installed between the first beam structure 110, the second beam structure 120, and the second frame column 102.
[0049] It should be noted that, in this embodiment of the invention, the first frame column 101 and the second frame column 102 can be formed before the first beam structure 110, the second beam structure 120, and the waterproofing panel structure 150 are formed (reinforcing bars are left on the frame columns for the beam reinforcement); the first frame column 101 and the second frame column 102 are the main frame parts of the building. The first beam structure 110, the second beam structure 120, and the waterproofing panel structure 150 are formed by concrete pouring. In this embodiment of the invention, the first beam structure 110 and the second beam structure 120 are approximately at an angle, and the first beam structure 110 is a curved cross-section beam. The first beam structure 110 is located above the second beam structure 120, and both the first beam structure 110 and the second beam structure 120 are connected to the first frame column 101 and the second frame column 102 respectively, that is, the first beam structure 110 and the second beam structure 120 are both formed by concrete on the first frame column 101 and the second frame column 102. At one end near the first frame column 101, the first beam structure 110 and the second beam structure 120 are integrated. At one end near the second frame column 102, the first beam structure 110 is located above the second beam structure 120, and a waterproof membrane structure 150 is provided between the first beam structure 110 and the second beam structure 120. This not only serves as a waterproofing function, but also allows the first beam structure 110 and the second beam structure 120 to concentrate and cooperate in bearing the load, ensuring the load-bearing capacity of the curved concrete double beam.
[0050] It should also be noted that at the bifurcation point between the first beam structure 110 and the second beam structure 120, this embodiment of the invention provides stirrups 130 and hanger bars 140. Multiple stirrups 130 may be present, all fitted onto the first beam structure 110 and the second beam structure 120 to reduce or prevent tensile cracking of the first beam structure 110 and the second beam structure 120. The hanger bars 140 are fixed to the stirrups 130, further reducing or preventing cracks from forming in the first beam structure 110 and the second beam structure 120 at this location.
[0051] The embodiments of the present invention can solve the problem of the height difference between the first frame column 101 and the second frame column 102 by setting up a first beam structure 110, a second beam structure 120 and a waterproof plate structure 150. At the same time, compared with the solution of using a single integral beam, the structural form of the first beam structure 110 and the second beam structure 120 provided by the present invention is more economical.
[0052] In an optional embodiment of the present invention, the first beam structure 110 described above includes a first beam body 111, a first beam top reinforcement 112, and a first beam bottom reinforcement 113. The first beam top reinforcement 112 is located at the top of the first beam body 111 and is fixedly connected to the first frame column 101 and the second frame column 102, respectively. The first beam bottom reinforcement 113 is located at the bottom of the first beam body 111 and is fixedly connected to the second frame column 102. The first beam body 111 is cast between the first beam top reinforcement 112 and the first beam bottom reinforcement 113.
[0053] It should be understood that the first beam 111 can be formed by cast-in-place concrete. The top reinforcement 112 and the bottom reinforcement 113 of the first beam are both steel reinforcement structures used to ensure the stability and reliability of the first beam structure 110. The top reinforcement 112 and the bottom reinforcement 113 of the first beam can be constructed from steel reinforcement, and this embodiment of the invention does not impose specific requirements or limitations on this. Furthermore, regarding the forming of the first beam structure 110, after the top reinforcement 112 and the bottom reinforcement 113 are erected, a formwork can be erected on the outside of the top reinforcement 112 and the bottom reinforcement 113 to cast the first beam structure 110 by pouring concrete.
[0054] In an optional embodiment of the present invention, the second beam structure 120 described above includes a second beam body 121, a second beam top reinforcement 122, and a second beam bottom reinforcement 123. The second beam bottom reinforcement 123 is located at the bottom of the second beam body 121 and is fixedly connected to the first frame column 101 and the second frame column 102 respectively. The second beam top reinforcement 122 is located at the top of the second beam body 121 and is fixedly connected to the second frame column 102. The second beam body 121 is cast between the second beam top reinforcement 122 and the second beam bottom reinforcement 123. The waterproof membrane structure 150 is installed between the first beam bottom reinforcement 113 and the second beam top reinforcement 122.
[0055] Meanwhile, it should also be understood that the second beam 121 can be formed by cast-in-place concrete. The top reinforcement 122 and the bottom reinforcement 123 of the second beam are both steel reinforcement structures, used to ensure the stability and reliability of the second beam structure 120. The top reinforcement 122 and the bottom reinforcement 123 of the second beam can be formed by laying steel reinforcement structures; this embodiment of the invention does not make specific requirements or limitations on this. Furthermore, regarding the forming of the second beam structure 120, after the top reinforcement 122 and the bottom reinforcement 123 of the second beam are erected, a formwork can be erected on the outside of the top reinforcement 122 and the bottom reinforcement 123 to cast the second beam structure 120 by pouring concrete. Of course, the first beam 111 and the second beam 121 can be formed by pouring concrete in one go.
[0056] Optionally, in this embodiment, the two ends of the hanger 140 extend to the first beam 111 and the second beam 121 respectively, and are fixedly connected to the stirrup 130 in the area of the first beam 111 and the second beam 121. The hanger 140 and the stirrup 130 can be fixed by binding, that is, when binding the reinforcing steel before pouring concrete, the hanger 140 and the stirrup 130 can be bound together to ensure the stability and reliability of the structure.
[0057] It should be noted that at the "fork" between the first beam structure 110 and the second beam structure 120, the stirrups 130 are used to fix the top reinforcement 112 and the bottom reinforcement 113 of the first beam, and the top reinforcement 122 and the bottom reinforcement 123 of the second beam; before the "fork" between the first beam structure 110 and the second beam structure 120, the stirrups 130 are used to fix the top reinforcement 112 and the bottom reinforcement 123 of the first beam; after the "fork" between the first beam structure 110 and the second beam structure 120, the upper stirrups 130 fix the top reinforcement 112 and the bottom reinforcement 113 of the first beam, and the lower stirrups 130 fix the top reinforcement 122 and the bottom reinforcement 123 of the second beam.
[0058] In an optional embodiment of the present invention, the above-mentioned waterproof membrane structure 150 includes a waterproof membrane body 151, waterproof membrane vertical reinforcement 152 and waterproof membrane horizontal reinforcement 153. The waterproof membrane horizontal reinforcement 153 and waterproof membrane vertical reinforcement 152 are arranged alternately in the waterproof membrane body 151. The waterproof membrane body 151 is installed between the bottom reinforcement 113 of the first beam and the top reinforcement 122 of the second beam.
[0059] It should be understood that the vertical reinforcement 152 and the horizontal reinforcement 153 of the waterproofing membrane are the steel reinforcement structure of the waterproofing membrane structure 150, and the waterproofing membrane body 151 is formed by pouring concrete. During construction, formwork can be erected on the outside of the vertical reinforcement 152 and the horizontal reinforcement 153 of the waterproofing membrane, and then the structure can be formed by pouring concrete.
[0060] Optionally, in this embodiment, structurally, the two ends of the vertical reinforcement 152 of the waterproof membrane extend into the first beam 111 and the second beam 121, respectively. When the vertical reinforcement 152 of the waterproof membrane is tied, its two ends can be fixedly connected to the bottom reinforcement 113 of the first beam and the top reinforcement 122 of the second beam, respectively. The fixed connection can be achieved through tying or similar methods.
[0061] Please see Figures 5 to 7 This invention provides a construction method for a double-beam concrete structure with a curved cross-section. This method is used to construct any of the double-beam concrete structures with curved cross-sections described in the preceding embodiments. As shown in the figure, the construction method for this double-beam concrete structure with a curved cross-section includes the following steps.
[0062] Step S1: Erect the support frame 200 and the bottom template 201.
[0063] In this step, a scaffold 200 is erected, timber beams and the bottom formwork 201 are laid. The scaffold 200 can be a disc-lock type full-span scaffold 200. Timber beams supporting the bottom of the slab and the bottom formwork on the timber beams are laid. The bottom formwork 201 can be made of wood. In step S1, the bottom formwork 201 is located below the bottom reinforcement 123 of the second beam.
[0064] Step S2: Reinforcement Binding Step. The reinforcement binding step includes the following sub-steps:
[0065] Sub-step S21: On the bottom template, between the first frame column 101 and the second frame column 102, erect the first beam top reinforcement 112, the first beam bottom reinforcement 113, the second beam top reinforcement 122, the second beam bottom reinforcement 123, the waterproofing slab vertical reinforcement 152 and the waterproofing slab horizontal reinforcement 153.
[0066] Sub-step S22: Place multiple stirrups 130 on the top reinforcement 112 of the first beam and the bottom reinforcement 123 of the second beam;
[0067] Sub-step S23: Install hanger bars 140 on stirrups 130.
[0068] For each of the above sub-steps, the top reinforcement 112 of the first beam, the top reinforcement 122 of the second beam, and the stirrups 130 are used to cast and form the first beam structure 110; the top reinforcement 122 of the second beam, the bottom reinforcement 123 of the second beam, and the stirrups 130 (at the "fork" position of the first and second beam structures) are used to cast and form the second beam structure 120; and the vertical reinforcement 152 and the horizontal reinforcement 153 of the waterproofing slab are used to cast and form the waterproofing slab structure 150. It should be noted that the reinforcement binding step mainly involves cutting and binding the reinforcement bars. The reinforcement structure of the curved cross-section concrete double beam includes the top reinforcement 112 of the first beam, the bottom reinforcement 113 of the first beam, the top reinforcement 122 of the second beam, the bottom reinforcement 123 of the second beam, the vertical reinforcement 152 of the waterproofing slab, the horizontal reinforcement 153 of the waterproofing slab, the stirrups 130, and the hanging reinforcement 140, etc. The top reinforcement bar 112 and the bottom reinforcement bar 113 of the first beam are curved steel bars, which can be processed according to the curvature provided by Revit. The stirrups 130 can be processed according to the elevation provided by Revit. The remaining steel bars are cut according to the normal method. The curved steel bars (top reinforcement bar 112 and bottom reinforcement bar 113 of the first beam) need to ensure the minimum protective layer thickness. After the steel bars are cut, the steel bars are tied.
[0069] Step S3: Template Installation Steps. The template installation steps include the following sub-steps:
[0070] Sub-step S31: Install the template for casting the second beam structure 120: Install the third side template 202 and the fourth side template 203 on the bottom template 201. The top reinforcement 122 and the bottom reinforcement 123 of the second beam are both located between the third side template 202 and the fourth side template 203. The third side template 202 and the fourth side template 203 are fixed to the bottom template 201.
[0071] Sub-step S32: Install the flat roof formwork, which includes a flat bottom formwork 204 and a flat top formwork 205. Fix the flat bottom formwork 204 to the fourth side formwork 203, and install the flat top formwork 205 above the flat bottom formwork 204.
[0072] Sub-step S33: Install templates for casting and molding the waterproof membrane structure 150 and the first beam structure 110: Install the grooved steel mold 206, the first side mold 207, the second side mold 208, the curved bottom mold 209, and the curved top mold 210. The grooved steel mold 206 is located above the third side mold 202 and fixed to the third side mold 202. The second side mold 208 is located above the grooved steel mold 206 and fixed to the grooved steel mold 206. The curved bottom mold 209 is located above the second side mold 208 and fixed to the second side mold 208. The first side mold 207 is located above the flat top mold 205 and fixed to the flat top mold 205. The curved top mold 210 is located above the first side mold 207 and fixed to the first side mold 207. The curved top mold 210 is provided with a casting hole 211.
[0073] In this embodiment, the curved top mold 210, the curved bottom mold 209, the first side mold 207 and the second side mold 208 are all steel templates; the bottom template 201, the third side mold 202 and the fourth side mold 203 are all wooden templates.
[0074] It should be noted that the curved top formwork 210 and the grooved steel formwork 206 can be fabricated using the curvature provided by Revit, while the remaining steel and wooden formwork are fabricated according to the set dimensions. After the reinforcement is tied, the third side formwork 202 and the fourth side formwork 203 of the second beam structure 120 are installed first. The third side formwork 202 is fixed to the bottom formwork 201, and the fourth side formwork 203 is fixed to the bottom formwork 201 by fixing timber and nails. Then, the flat roof formwork is installed. The flat bottom formwork 204 is fixed to the fourth side formwork 203 by fixing timber and nails, and the flat top formwork 205 is installed above the roof panel. Next, the grooved steel formwork 206 of the waterproofing board structure 150 and the first beam structure 110 are installed. The first side mold 207, the second side mold 208, the third side mold 202, and the grooved steel mold 206 are fixed by fixing timber and studs; the grooved steel mold 206 and the second side mold 208 are fixed by bolts; the flat top mold 205 and the first side mold 207 are fixed by fixing timber, nails, and through bolts 302; finally, the curved bottom mold 209 and the curved top mold 210 are installed, the second side mold 208 is fixed to the curved bottom mold 209 by bolts, and the first side mold 207 is fixed to the curved top mold 210 by bolts.
[0075] Step S4: Template reinforcement step. In this step, the second side mold 208 and the grooved steel mold 206 are reinforced with the first side mold 207 by longitudinal timber and tie rods.
[0076] It should be noted that the double-sided reinforcing longitudinal timbers 301 on both sides of the structure reinforce the first side formwork 207 and the second side formwork 208, and the first side formwork 207 and the groove template, through through bolts 302, to prevent formwork bulging during concrete pouring. Holes are provided between the first side formwork 207 and the second side formwork 208, and between the first side formwork 207 and the groove template; the through bolts 302 pass through these holes to reinforce the first side formwork 207 and the second side formwork 208, and between the first side formwork 207 and the groove template. The reinforcing transverse timbers and the reinforcing longitudinal timbers 301 are fixed with nails, forming a unified whole from two or more reinforcing transverse timbers on one side, thus enhancing the safety of the side formwork.
[0077] Step S5: Pour concrete into the pouring hole 211 to form a double concrete beam with a curved cross section.
[0078] In step S5, a concrete pump truck is used to pour concrete through the pre-drilled pouring hole 211 in the curved top mold 210. After pouring, a vibrator is used to compact the concrete to ensure its density, thus forming the curved cross-section concrete double beam.
[0079] Please refer to the following: Figures 1 to 7The present invention provides a curved cross-section concrete double beam and its construction method: the first frame column 101 and the second frame column 102 are the main frame parts of the building. The first beam structure 110 and the second beam structure 120 are approximately at an angle, and the first beam structure 110 is a curved cross-section beam. The first beam structure 110 is located above the second beam structure 120, and both the first beam structure 110 and the second beam structure 120 are respectively connected to the first frame column 101 and the second frame column 102, that is, the first beam structure 110 and the second beam structure 120 are both formed by concrete on the first frame column 101 and the second frame column 102. At the end near the first frame column 101, the first beam structure 110 and the second beam structure 120 are integrated. At the end near the second frame column 102, the first beam structure 110 is located above the second beam structure 120, and a waterproof membrane structure 150 is provided between the first beam structure 110 and the second beam structure 120. This serves both a waterproofing function and allows the first beam structure 110 and the second beam structure 120 to concentrate and cooperate in bearing the load, ensuring the load-bearing capacity of the curved concrete double beam. At the "fork" position of the first beam structure 110 and the second beam structure 120, this embodiment of the invention provides stirrups 130 and hangers 140. There can be multiple stirrups 130, all of which are fitted onto the first beam structure 110 and the second beam structure 120 to reduce or prevent tensile cracking of the first beam structure 110 and the second beam structure 120. The hangers 140 are fixed to the stirrups 130, which can further reduce or prevent cracks from forming in the first beam structure 110 and the second beam structure 120 at this position. The embodiments of the present invention can solve the problem of the height difference between the first frame column 101 and the second frame column 102 by setting up a first beam structure 110, a second beam structure 120 and a waterproof plate structure 150. At the same time, compared with the solution of using a single integral beam, the structural form of the first beam structure 110 and the second beam structure 120 provided by the present invention is more economical.
[0080] The above provides a detailed description of a curved cross-section concrete double beam and its construction method disclosed in the embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the curved cross-section concrete double beam, construction method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.
Claims
1. A double-beam concrete structure with a variable cross-section, characterized in that, include: First frame column (101); The top of the second frame column (102) is higher than the top of the first frame column (101); The first beam structure (110) has one end connected to the top of the first frame column (101) and the other end connected to the top of the second frame column (102); The second beam structure (120) is located below the first beam structure (110). One end of the second beam structure (120) is connected to the first beam structure (110), and the other end is connected to the second frame column (102). Stirrups (130) are fitted onto the first beam structure (110) and the second beam structure (120). The suspension rod (140) extends to the first beam structure and the second beam structure respectively and is fixedly connected to the stirrup (130); A waterproof membrane structure (150) is formed between the first beam structure (110), the second beam structure (120), and the second frame column (102).
2. The double-beam concrete beam with variable cross-section according to claim 1, characterized in that, The first beam structure (110) includes a first beam body (111), a first beam top reinforcement (112), and a first beam bottom reinforcement (113). The first beam top reinforcement (112) is located at the top of the first beam body (111) and is fixedly connected to the first frame column (101) and the second frame column (102) respectively. The first beam bottom reinforcement (113) is located at the bottom of the first beam body (111) and is fixedly connected to the second frame column (102). The first beam body (111) is cast on the first beam top reinforcement (112) and the first beam bottom reinforcement (113).
3. The double-beam concrete beam with variable cross-section according to claim 2, characterized in that, The second beam structure (120) includes a second beam body (121), a second beam top reinforcement (122), and a second beam bottom reinforcement (123). The second beam bottom reinforcement (123) is located at the bottom of the second beam body (121) and is fixedly connected to the first frame column (101) and the second frame column (102) respectively. The second beam top reinforcement (122) is located at the top of the second beam body (121) and is fixedly connected to the second frame column (102). The second beam body (121) is cast between the second beam top reinforcement (122) and the second beam bottom reinforcement (123). The waterproof membrane structure (150) is formed between the first beam bottom reinforcement (113) and the second beam top reinforcement (122).
4. The double-beam concrete beam with variable cross-section according to claim 3, characterized in that, The waterproofing slab structure (150) includes a waterproofing slab body (151), waterproofing slab vertical reinforcement (152), and waterproofing slab horizontal reinforcement (153). The waterproofing slab horizontal reinforcement (153) and the waterproofing slab vertical reinforcement (152) are arranged alternately in the waterproofing slab body (151). The waterproofing slab body (151) is located between the bottom reinforcement (113) of the first beam and the top reinforcement (122) of the second beam.
5. The double-beam concrete beam with variable cross-section according to claim 4, characterized in that, The two ends of the vertical reinforcement (152) of the waterproof membrane extend into the first beam (111) and the second beam (121), respectively.
6. The double-beam concrete beam with variable cross-section according to claim 5, characterized in that, The vertical reinforcement bars (152) of the waterproof membrane are fixedly connected to the bottom reinforcement bars (113) of the first beam and the top reinforcement bars (122) of the second beam, respectively.
7. The double-beam concrete beam with variable cross-section according to claim 3, characterized in that, The two ends of the suspension rod (140) extend to the first beam (111) and the second beam (121) respectively, and are fixedly connected to the stirrup (130) in the regions of the first beam (111) and the second beam (121).
8. A construction method for a double-beam concrete structure with variable cross-section, used for constructing the double-beam concrete structure with variable cross-section as described in claim 6, characterized in that, The construction method includes: Erect the scaffolding (200) and the bottom template (201); The rebar tying step includes: A first beam top reinforcement (112), a first beam bottom reinforcement (113), a second beam top reinforcement (122), a second beam bottom reinforcement (123), a waterproofing membrane vertical reinforcement (152), and a waterproofing membrane horizontal reinforcement (153) are erected on the bottom template between the first frame column (101) and the second frame column (102). Multiple stirrups (130) are fitted on the first beam top reinforcement (112) and the second beam bottom reinforcement (123), and hanging bars (140) are installed on the stirrups (130). The first beam top reinforcement (112) and the second beam top reinforcement (122) are used to cast and form the first beam structure (110), the second beam top reinforcement (122) and the second beam bottom reinforcement (123) are used to cast and form the second beam structure (120), and the waterproofing membrane vertical reinforcement (152) and the waterproofing membrane horizontal reinforcement (153) are used to cast and form the waterproofing membrane structure (150). Multiple stirrups (130) are fitted onto the top reinforcement (112) of the first beam and the bottom reinforcement (123) of the second beam. Install hanger bars (140) on the stirrups (130); Template installation steps, the template installation steps include: Install templates for casting the second beam structure (120): Install third side templates (202) and fourth side templates (203) on the bottom template (201), the top reinforcement (122) and bottom reinforcement (123) of the second beam are both located between the third side template (202) and the fourth side template (203), wherein the third side template (202) and the fourth side template (203) are fixed to the bottom template (201); Install flat roof formwork, the flat roof formwork includes a flat bottom formwork (204) and a flat top formwork (205), fix the flat bottom formwork (204) to the fourth side formwork (203), and install the flat top formwork (205) above the flat bottom formwork (204). Install templates for casting and molding the waterproof slab structure (150) and the first beam structure (110): Install a grooved steel mold (206), a first side mold (207), a second side mold (208), a curved bottom mold (209), and a curved top mold (210), wherein the grooved steel mold (206) is located above the third side mold (202) and fixed to the third side mold (202), and the second side mold (208) is located above the grooved steel mold (206) and fixed to the third side mold (202). The channel steel mold (206) is fixed, the curved bottom mold (209) is located above the second side mold (208) and fixed to the second side mold (208), the first side mold (207) is located above the flat top mold (205) and fixed to the flat top mold (205), the curved top mold (210) is located above the first side mold (207) and fixed to the first side mold (207), and the curved top mold (210) is provided with a casting hole (211); Concrete is poured into the pouring hole (211) to form the double concrete beam with variable cross section.
9. The construction method of the curved cross-section concrete double beam according to claim 8, characterized in that, The curved top mold (210), the curved bottom mold (209), the grooved steel mold (206), the first side mold (207) and the second side mold (208) are all steel templates; the bottom template (201), the third side mold (202) and the fourth side mold (203) are all wooden templates.
10. The construction method of a double-beam concrete beam with a variable cross-section according to claim 8 or 9, characterized in that, Before pouring concrete, the construction method further includes a formwork reinforcement step, which includes: reinforcing the second side formwork (208) and the grooved steel formwork (206) with the first side formwork (207) by longitudinal timber and tie rods.