A folded plate-shaped connection node between a frame structure and a wall and an assembled building thereof

Abstract

The present invention provides a folding plate-shaped connection node between a frame structure and a wall and an assembled building thereof, wherein the folding plate-shaped connection node comprises a frame, a wall and a folding plate connection assembly; the wall is arranged on the frame through a plurality of the folding plate connection assemblies; the folding plate connection assembly comprises two symmetrically arranged connecting folding plates; the connecting folding plates are bent connecting plates, and the two ends of the connecting folding plates are respectively connected to the frame and the wall. The folding plate-shaped structural form of the present application can not only effectively absorb and consume energy, but also has self-resetting ability, especially the residual deformation of the structure after early unloading is basically zero, and the residual deformation of the structure after later loading is still very small. The reduction of residual deformation can effectively reduce permanent damage to the structure, reduce structural losses, and improve the repairability of the structure.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a folded plate-shaped connection node between a frame structure and a wall and an assembled building thereof. Background Art

[0002] Prefabricated buildings have been widely promoted and applied due to their high efficiency and ease of implementation. However, there are the following deficiencies or defects between the frames and walls of existing prefabricated buildings:

[0003] (1) The traditional steel frame embedded RC shear wall structure consumes a lot of materials, is heavy, and has a high cost. The maintenance cost is also high after the structure is damaged.

[0004] (2) Although traditional concrete sandwich walls have good thermal insulation properties, when the concrete covering is thin, they mainly exhibit non-structural component characteristics similar to those of infill walls, and their mechanical properties such as bearing capacity and stiffness are average; when a thicker concrete covering is used, their dead weight is larger.

[0005] (3) Research on the frame-supported multi-rib composite wall structure system mainly focuses on the reinforced concrete frame-multi-rib composite wall coordinated structure. There is a lack of coordinated force analysis of multi-rib composite wall and steel frame structure, and there is also little research on the performance of corresponding connectors. In addition, the traditional frame-supported multi-rib composite wall structure system adopts an embedded structural form. When combined with the steel frame to form a coordinated structure, the frame columns are exposed, which is not conducive to the corrosion protection of the steel structure and affects the durability of the structure.

[0006] (4) Under the action of load, the residual deformation of the connection structure is large, it does not have the ability to self-reset, and to a certain extent cannot meet the requirements of large structural deformation. Summary of the invention

[0007] The object of the present invention is to provide a folded plate-shaped connection node between a frame structure and a wall and an assembled building thereof, so as to solve at least one of the above-mentioned technical problems existing in the prior art.

[0008] In order to solve the above technical problems, the present invention provides a folded plate-shaped connection node between a frame structure and a wall, comprising: a frame, a wall and a folded plate connection assembly;

[0009] The wall is arranged on the frame through a plurality of folding plate connection assemblies;

[0010] The folding plate connection assembly comprises two symmetrically arranged connecting folding plates;

[0011] The connecting folding plate is a connecting plate that is bent, and two ends of the connecting folding plate are respectively connected to the frame and the wall.

[0012] The folding plate-shaped structure of the present application can not only effectively absorb and consume energy, but also has a certain self-resetting ability, especially the residual deformation of the structure after the initial unloading is basically zero, and the residual deformation of the structure after the loading is still very small. The reduction of residual deformation can effectively reduce the permanent damage to the structure, reduce the loss of the structure, and improve the repairability of the structure. The folding plate-shaped nodes of the present application and the integrated wall panels, steel beams, and supports are prefabricated as a whole in the factory, which improves the efficiency of on-site construction. In addition, the folding plate-shaped connection of the present application is a semi-rigid node with very good deformation ability and self-resetting performance, which has three effects on the wall panels: one is that it can reduce the relative deformation of the wall panels and steel beams to avoid cracking of the wall panels; the second is that it has an energy-consuming effect, especially when the connecting parts are filled with foamed aluminum; the third is that the connecting parts themselves have good ductility and are not easy to damage and are easy to disassemble and replace after damage.

[0013] This application can realize the integrated prefabrication of steel beams, steel supports and sandwich insulation exterior wall panels, improve the integration of structure and enclosure, and improve on-site assembly efficiency. It is in line with the green energy-saving and environmentally friendly architectural concept and overcomes the difficulties in connecting prefabricated structures.

[0014] Furthermore, the space between the two connecting folding plates of the folding plate connecting assembly is filled with heat-insulating material.

[0015] Furthermore, the thermal insulation material is foamed aluminum.

[0016] Furthermore, the connecting folding plate includes connecting seats arranged at both ends and a bending portion arranged in the middle; the connecting seat is provided with connecting holes, and is connected to the frame and the wall by fasteners such as bolts / anchors.

[0017] Furthermore, the bending portion is arranged to be bent once or several times.

[0018] Furthermore, the folding plate connection assembly is vertically arranged, and a groove for accommodating the folding plate connection assembly is arranged on the wall.

[0019] Furthermore, the folding plate connecting assembly is arranged horizontally, the connecting seat portion of the connecting folding plate is abutted against the side surface of the wall, and the wall is suspended on the frame.

[0020] The folding plate connector of the present application can realize dry connection of assembled wall panels, which is convenient for engineering use. At the same time, due to the unique structural characteristics of the two, the connector not only has good deformation ability, but also has good self-reset ability after deformation, which can reduce the relative deformation of the steel frame and the wall, and can ensure the deformation coordination of the two. At the same time, the ductility and self-reset ability of the connector can also reduce the damage of the wall panels and the connector itself, enhance the ability of the structure to resist external loads, and improve the toughness of the structure.

[0021] In a second aspect of the present application, an assembled building using the above-mentioned frame structure and a folded plate-shaped connection node between the wall is also disclosed, wherein the frame includes a column and a beam; the wall is connected to the beam via the folded plate connection assembly.

[0022] Furthermore, it also includes a heat insulation board and a cantilever beam arranged outdoors;

[0023] The connecting end of the cantilever beam is provided with an end plate;

[0024] The cantilever beam is fixedly connected to the column through an end plate;

[0025] The heat insulation board is arranged between the end plate and the column. The heat insulation board is made of a heat-insulating material and is used to block heat conduction between the column, the end plate and the cantilever beam.

[0026] The present application arranges a heat insulation board between the cantilever beam and the column. The heat insulation board is made of a heat-insulating material with low thermal conductivity and high strength, such as a PVC board. This can effectively reduce heat transfer while ensuring the bearing performance of the node.

[0027] Furthermore, the end plate and the column are connected by fastening connectors such as bolts or annular groove rivets.

[0028] Preferably, the fastening connector is made of materials such as stainless steel.

[0029] Furthermore, the heat insulation board is made of thermal insulation materials such as nylon 6 (PA6), rigid polyvinyl chloride (PVC), epoxy resin glass fiber (FR4) and polyetheretherketone (PEEK).

[0030] Furthermore, a beam supporting plate is arranged on the column and below the end plate, and the end plate is overlapped on the beam supporting plate.

[0031] The beam support plate is a vertically arranged rib plate member used for local reinforcement. Preferably, the beam support plate is made of stainless steel to reduce heat conduction caused by the beam support plate.

[0032] Furthermore, one or more through holes are opened on the middle and lower part of the beam supporting plate.

[0033] Furthermore, the opening rate per unit area of ​​the middle and lower openings of the beam support plate is 30-60%.

[0034] Furthermore, in the height direction, the opening rate per unit area of ​​the middle and lower openings of the beam supporting plate gradually increases.

[0035] Opening through holes at the parts of the beam support plate where the force is less, can effectively reduce the thermal conductivity and reduce the heat loss caused by the beam support. At the same time, it can effectively reduce the creep effect of the insulation board and ensure the safety of the structure.

[0036] Furthermore, inner partitions are provided in the column and at corresponding positions of the end plates.

[0037] Furthermore, an external steel plate is arranged on the outside of the column, and the end plate is fixed to the column through a heat insulation plate and the external steel plate in sequence.

[0038] That is, the nodes can be locally strengthened by adding internal partitions or external welded steel plates (fillet welds or through-hole plug welds).

[0039] Furthermore, it also includes a wall insulation layer, and the beam supporting plate is buried in the wall insulation layer.

[0040] Furthermore, the wall insulation layer is flush with or higher than the outer side surface of the end plate.

[0041] The beam-column joint disclosed in this application has high safety and low thermal conductivity, which improves the thermal insulation performance of the building, and can be prefabricated in the factory, which improves the efficiency of on-site assembly; it conforms to the current green energy-saving and environmentally friendly building concept. At the same time, it solves the thermal bridge problem of the cantilevered steel beam of the steel structure, the selection of thermal blocking materials that take into account both thermal insulation performance and stress performance, and solves the problem of thermal insulation materials being prone to fire and insufficient durability in the external thermal insulation of buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A front view of a folded plate-shaped connection node between a frame structure and a wall provided in Example 1 of the present invention;

[0044] Figure 2 for Figure 1 The enlarged view at E in the middle;

[0045] Figure 3 It is a schematic diagram of the structure when the folded plate connection assembly is filled with thermal insulation material;

[0046] Figure 4 This is a schematic diagram of the structure when the folding plate connection assembly in Example 1 is arranged horizontally and hung on the wall;

[0047] Figure 5 for Figure 4 The enlarged view of A in the middle;

[0048] Figure 6The folding plate connection assembly 20 shown is a 45° folding plate angle connection piece;

[0049] Figure 7 The folding plate connection assembly 20 shown is a 63° folding plate angle connection piece.

[0050] Figure 8 The hysteresis curve of the 45° folded plate angle connector under different vertical pressures;

[0051] Fig. 9 The hysteresis curve of the 63° folded plate angle connector under different vertical pressures;

[0052] Fig.10 is the hysteresis curve of the early slip phase obtained by finite element calculation;

[0053] Fig.11 is the hysteresis curve of the whole loading process obtained by finite element calculation;

[0054] Fig.12 This is a front view of the beam-column node in Example 2;

[0055] Fig.13 It is a structural schematic diagram of the beam-column node when a beam support plate is provided in Example 2;

[0056] Fig.14 for Fig.13 The right side view of the beam-column joint is shown;

[0057] Fig.15 This is a schematic diagram of the structure of the beam-column node when an external steel plate is provided in Example 2;

[0058] Fig.16 for Fig.15 A top view of the beam-column joint shown in ;

[0059] Fig.17 A front view of a novel thermal insulation and decoration integrated lightweight wall provided by an embodiment of the present invention;

[0060] Fig.18 for Fig.17 Middle AA section view;

[0061] Fig.19 for Fig.17 Middle BB section view;

[0062] Fig. 20 This is a schematic diagram of the connection structure of the column, the ground beam and the pile in Example 3 of the present invention;

[0063] Fig.21 A schematic diagram of the steel pipe pile structure of a building provided in Example 3 of the present invention;

[0064] Fig. 22It is a schematic structural diagram of a rotatable stiffening rib assembly in Embodiment 3 of the present invention;

[0065] Fig.23 This is a schematic diagram of the structure of the hollow steel pipe in Example 3 of the present invention;

[0066] Fig.24 A cross-sectional view of a steel pipe pile provided in Example 3 of the present invention;

[0067] Fig.25 Schematic diagram of the connection structure of two adjacent rotatable stiffening rib assemblies in Example 3 of the present invention.

[0068] Reference numerals:

[0069] 1a-prefabricated ground beam; 4a-prefabricated cap; 9-pile; 10-frame; 11-crossbeam; 11a-cantilever beam; 12-column; 12b-external steel plate; 13-wall; 13a-concrete inner page plate; 13b-concrete outer page plate; 13c-connecting block; 13d-metal mesh; 13e-metal wire; 14-insulation board; 15-fastening connector; 16-end plate; 17-beam support plate; 17a-through hole; 18-wall insulation layer; 19 -sandwich layer; 20-folding plate connecting assembly; 21-connecting folding plate; 22-connecting seat; 23-bending part; 24-insulating material; 100-steel pipe pile; 101-concrete pile; 110-hollow steel pipe; 111-pre-opening; 112-first guide groove; 113-second guide groove; 114-hook; 120-rotatable stiffening rib assembly; 121-rib plate; 122-support member; 123-pivot shaft; 125-rope; 126-soft cable. DETAILED DESCRIPTION

[0070] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0072] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] The present invention is further explained below in conjunction with specific implementation modes.

[0074] Example 1

[0075] like Figure 1-2 As shown, the present embodiment provides a folded plate-shaped connection node between a frame structure and a wall, comprising: a frame 10, a wall 13 and a folded plate connection assembly 20; the wall 13 is arranged on the frame 10 through a plurality of folded plate connection assemblies 20; the folded plate connection assembly 20 comprises two symmetrically arranged connection folded plates 21; the connection folded plates 21 are bent connection plates, and the two ends of the connection folded plates 21 are respectively connected to the frame 10 and the wall 13. The frame 10 comprises a column 12 and a beam 11.

[0076] The folded plate structure of the present application can not only effectively absorb and consume energy, but also has self-reset capability, especially the residual deformation of the structure after early unloading is basically zero, and the residual deformation of the structure after late loading is still very small. The reduction of residual deformation can effectively reduce permanent damage to the structure, reduce structural losses, and improve the repairability of the structure.

[0077] This application can realize the integrated prefabrication of steel beams, steel supports and sandwich insulation exterior wall panels, improve the integration of structure and enclosure, and improve on-site assembly efficiency. It is in line with today's green energy-saving and environmentally friendly building concepts and overcomes the difficulties in connecting prefabricated structures.

[0078] Reference Figure 3 As shown, the space between the two connecting folding plates 21 of the folding plate connecting assembly 20 is filled with a heat-insulating material 24. Preferably, the heat-insulating material 24 is foamed aluminum.

[0079] Furthermore, the connecting folding plate 21 includes connecting seats 22 arranged at both ends and a bending portion 23 arranged in the middle; the connecting seat 22 is provided with connecting holes, and is connected to the frame 10 and the wall 13 by fasteners such as bolts / anchors.

[0080] Reference Figure 2 As shown, the bending portion 23 is a single bend, or refer to Figure 3 As shown, the bending portion 23 is bent multiple times.

[0081] Reference Figure 2 As shown, the folding plate connection assembly 20 is vertically arranged, and a groove for accommodating the folding plate connection assembly 20 is arranged on the wall 13.

[0082] Reference Figure 4 and 5 As shown, the folding plate connecting assembly 20 is arranged horizontally, and the connecting seat portion 22 of the connecting folding plate 21 is pressed against the side surface of the wall 13, and the wall 13 is suspended on the frame 10.

[0083] In this application, when the two sides of the folding plate connection assembly 20 are relatively displaced, the folding plate connection assembly 20 generates plastic deformation to dissipate energy. Under the action of vertical tension, the tension borne by the folding plate connection assembly 20 is directly applied to the metal connection folding plate 21 by the bolts / anchors on both sides in the form of concentrated force, and the horizontal section of the connection piece is locally sheared by the concentrated force, resulting in the tensile bearing capacity of the connection folding plate 21 being different from the compressive bearing capacity. And the folding plate connection assembly 20 can be filled with different materials to improve its force performance.

[0084] Figure 6 The folding plate connection assembly 20 shown is a 45° folding plate angle connection piece; Figure 7 The folding plate connection assembly 20 shown is a 63° folding plate angle connection piece. Figure 8 The hysteresis curve of the 45° folded plate angle connector under different vertical pressures; Fig. 9 The hysteresis curves of the 63° folded plate angle connector under different vertical pressures. It can be concluded that when there is no vertical load, the filling of foam aluminum (XPS) material has little effect on the hysteresis performance of the folded plate connector in a small displacement range; when the hysteresis displacement increases, the post-peak load of the unfilled folded plate connector decreases rapidly. After filling with foam aluminum material, the later lateral bearing capacity of the connector is significantly higher than that of the pure metal folded plate connector, and the strength degradation is relatively slow. This result shows that even filling with low-strength materials can alleviate the problem of rapid decline in the post-peak bearing capacity of the folded plate connector.

[0085] Folded plate connectors are used in steel frame-multi-rib composite wall structures to achieve sliding connections between the top and bottom beams of the frame and the wall. The 10mm gap between the two sides of the embedded part of the wall and the frame column ( L open = 2×10mm=20mm) is not filled to achieve relative slip between the structure and the frame in the early stage of loading. The folding plate connector is used in conjunction with the structure in a typical Null-452 type. Fig.10 is the hysteresis curve of the early slip phase obtained by finite element calculation; Fig.11 is the hysteresis curve of the whole loading process obtained by finite element calculation;

[0086] When the folded plate connector is used to realize the sliding connection between the multi-rib composite wall and the top and bottom beams of the frame, the size of the sliding section in the early stage of the structureD slip Controlled by the gap between the wall and the frame columns on both sides L open (In this section, the finite element model L open =20mm), and the ultimate displacement of the structure D u The limit displacement of a single connection d u In the early stage of slip, both connection methods showed obvious self-reset performance. D slip = 20mm slip section, the residual deformation of the structure is small, and the hysteresis curve is spindle-shaped. The main characteristic stress process of the structure can be expressed in the form of multiple broken lines.

[0087] When using folded plate connectors for connection, stress is concentrated at the bend of the horizontal section of the folded plate connector under the action of horizontal reciprocating load, resulting in obvious plastic damage. The structure will stop working in the later stage due to damage and failure of the folded plate connector. Therefore, folded plate connectors are more suitable for use in areas with very small relative slip.

[0088] When the structure is subjected to lateral force, the sliding connection can allow relative displacement between the steel frame and the wall panel, which can effectively reduce the damage to the wall panel. The folded plate structure can not only effectively consume energy, but also has a certain self-reset ability. In particular, the residual deformation of the structure after the initial unloading is basically zero, and the residual deformation of the structure after the loading is still very small. The reduction of residual deformation can effectively reduce the permanent damage of the structure, reduce the loss of the structure, and improve the repairability of the structure.

[0089] Example 2

[0090] Reference Fig.12 As shown, this embodiment discloses an assembled building using the above-mentioned frame structure and a folded plate-shaped connection node between the wall, which includes: a cross beam 11, a column 12, an insulation board 14 and a cantilever beam 11a arranged outdoors; an end plate 16 is arranged at the connecting end of the cantilever beam 11a; the cantilever beam 11a is fixedly connected to the column 12 through the end plate 16; the insulation board 14 is arranged between the end plate 16 and the column 12, and the insulation board 14 is made of a thermal insulation material and is used to block the heat conduction between the column 12 and the end plate 16 and the cantilever beam 11a.

[0091] The present application arranges a heat insulation board 14 between the cantilever beam 11a and the column 12. The heat insulation board 14 is made of a heat-insulating material with low thermal conductivity and high strength, such as a PVC board. This can effectively reduce heat transfer while ensuring the bearing performance of the node.

[0092] Specifically, the end plate 16 and the column 12 are connected by fastening connectors 15 such as bolts or annular groove rivets. Preferably, the fastening connectors 15 are made of materials such as stainless steel, so as to reduce heat conduction of the fastening connectors 15.

[0093] The heat insulation board 14 is made of insulation materials such as nylon 6 (PA6), rigid polyvinyl chloride (PVC), epoxy resin glass fiber (FR4) and polyetheretherketone (PEEK). The heat insulation board 14 is preferably made of rigid polyvinyl chloride (PVC).

[0094] More preferably, refer to Fig.13 and 14 As shown, a beam support plate 17 is arranged on the column 12 and below the end plate 16, and the end plate 16 is overlapped on the beam support plate 17. The beam support plate 17 is a vertically arranged rib plate member used for local reinforcement. Further, one or more through holes 17a are opened on the middle and lower part of the beam support plate 17. The opening rate per unit area of ​​the middle and lower opening part of the beam support plate 17 is 30-60%. Opening through holes in the part of the beam support plate 17 where the force is less can effectively reduce the thermal conductivity, reduce the heat loss caused by the beam support, and effectively reduce the creep effect of the insulation board 14.

[0095] This embodiment further includes a wall insulation layer 18, and the beam support plate 17 is buried in the wall insulation layer 18. Further, the wall insulation layer 18 is flush with or higher than the outer side surface of the end plate 16.

[0096] and optionally, with reference to Fig.15 and 16 As shown, an external steel plate 12b is provided on the outside of the column 12, and the end plate 16 is fixed to the column 12 through the heat insulation plate 14 and the external steel plate 12b in sequence. The cross section of the external steel plate 12b is U-shaped and is wrapped around the outside of the column 12. That is, the node can be locally strengthened by adding an internal partition plate 12a or an external welded steel plate (corner weld or perforated plug weld).

[0097] The beam-column joints in this application have high safety and low thermal conductivity, which improves the thermal insulation performance of the building, and can be prefabricated in the factory to improve the efficiency of on-site assembly; it conforms to the current green energy-saving and environmentally friendly building concept. At the same time, it solves the thermal bridge problem of cantilevered steel beams in steel structures, the selection of thermal blocking materials that take into account both thermal insulation performance and stress performance, and solves the problem of thermal insulation materials being prone to fire and lacking durability in building external insulation practices.

[0098] Reference Fig.17As shown, the wall includes: a concrete inner page plate 13a, a concrete outer page plate 13b, a sandwich layer 19 and a connecting block 13c; the concrete inner page plate 13a and the concrete outer page plate 13b are arranged in parallel and spaced apart; the sandwich layer 19 is clamped between the concrete inner page plate 13a and the concrete outer page plate 13b; a plurality of through holes are provided on the concrete inner page plate 13a, the sandwich layer 19 and the concrete outer page plate 13b; the connecting block 13c is a lightweight concrete block, a plurality of connecting blocks 13c are inserted in the through holes, and the connecting blocks 13c horizontally penetrate the concrete inner page plate 13a, the sandwich layer 19 and the concrete outer page plate 13b. The connecting block 13c is a block material of autoclaved aerated concrete or foamed concrete.

[0099] The connecting block 13c can cooperate with the concrete inner and outer page plates to bear the force, replace concrete to reduce the dead weight of the wall panels, replace stainless steel or FRP insulation connectors to reduce costs, and improve the collaborative working performance between the inner and outer page plates. It has the advantages of light dead weight, good insulation performance, and low cost.

[0100] Among them, a plurality of connecting blocks 13c are arranged in a matrix. A metal wire 13e is arranged in the connecting block 13c to enhance the strength of the connecting block 13c. A metal mesh 13d is arranged in the concrete inner page plate 13a and the concrete outer page plate 13b to enhance the strength of the concrete inner page plate 13a and the concrete outer page plate 13b to prevent concrete cracking. The metal wire 13e and the metal mesh 13d are preferably made of stainless steel.

[0101] More preferably, the metal meshes 13d in the concrete inner page plate 13a and the concrete outer page plate 13b are enclosed around the through holes to form closed stirrups for strengthening the connection between the connecting block 13c and the concrete inner page plate 13a and the concrete outer page plate 13b.

[0102] The present invention has the advantages of light weight and good thermal insulation performance of the wallboard. The connecting blocks 13c are used to replace a large amount of concrete to reduce the weight of the wallboard, reduce the cost, and improve the thermal insulation performance; and the wallboard has good stress resistance.

[0103] Example 3

[0104] The structure of this embodiment is basically the same as that of embodiment 2, except that:

[0105] Reference Fig. 20 As shown, this embodiment further includes a prefabricated foundation 4a and a pile body 9, and the prefabricated ground beam 1a is overlapped on the prefabricated foundation 4a; the bottom of the prefabricated foundation is connected to the pile body 9.

[0106] Preferably, the pile body 9 includes a concrete pile 101 and a steel pipe pile 100; on a horizontal projection plane, one or more steel pipe piles 100 are arranged between two adjacent concrete piles 101; in a depth direction, the length of the concrete pile is greater than the length of the steel pipe pile. The bottom of the concrete pile rests on a harder geological layer.

[0107] Based on the above scheme, more preferably, refer to Figure 21-24 As shown, the steel pipe pile 100 includes: a hollow steel pipe 110 and a rotatable stiffening rib assembly 120; the rotatable stiffening rib assembly 120 includes: a support member 122 and a rib plate 121; the support member 122 is an arc-shaped plate, and the rib plate 121 is fixed on the outer surface of the support member 122; a pre-opening 111 is provided on the tube wall of the hollow steel pipe 110; the rotatable stiffening rib assembly 120 is rotatably inserted in the hollow steel pipe 110; the rotatable stiffening rib assembly 120 is forced to rotate by external force, and the rib plate 121 extends out of the hollow steel pipe 110 from the pre-opening 111, and the outer side surface of the support member 122 is attached to the inner wall of the hollow steel pipe 110.

[0108] The steel pipe pile 100 is relatively simple to construct, and has the advantages of high efficiency and low cost, but it is usually suitable for soil or rock layers with good geological conditions. When used in geology with thick sand layers, it has the defect of insufficient supporting force. However, the present application sets a rotatable stiffening rib assembly 120 in the steel pipe pile 100. After the steel pipe pile 100 is inserted into the set borehole, the gravity of the rod or the injected cement is used to force the rotatable stiffening rib assembly 120 to swing, and the rib plate 121 extends from the hollow steel pipe 110 through the pre-opening 111 to form a reinforcing rib plate 121, thereby increasing the supporting capacity of the steel pipe pile 100. It has the characteristics of convenient construction and low destructiveness.

[0109] More preferably, a plurality of pre-openings 111 are provided on the wall of the hollow steel pipe 110 at intervals along the axial direction of the hollow steel pipe 110. At least before the rotatable stiffening rib assembly 120 is forced to rotate by external force, the rotatable stiffening rib assembly 120 is arranged above the pre-openings 111; the rotatable stiffening rib assembly 120 swings from top to bottom.

[0110] The arc-shaped plate shape of the support member 122 needs to satisfy the condition that it can swing from top to bottom in the hollow steel pipe 110. The rib plate 121 is in a crescent shape and is vertically welded to the outer surface of the support member 122.

[0111] The support member 122 includes a pivot end and a swing end, and the pivot end is provided with a pivot shaft 123 pivotally connected to the inner wall of the hollow steel tube 110. A hook 114 is provided on the inner wall of the hollow steel tube 110 and above the pre-opened hole 111, and the hook 114 opens upward. When the rotatable stiffening rib assembly 120 swings from top to bottom, the pivot shaft 123 of the support member 122 is clamped into the hook 114, thereby forming a pivot structure.

[0112] In a direction perpendicular to the rib 121, the pivot shaft 123 is slidably disposed on the support member 122, and a return spring (not shown) is disposed between the support member 122 and the pivot shaft 123; the return spring is in a compressed state, tending to force the pivot shaft 123 to move away from the swing end.

[0113] Preferably, based on the above technical solution, the rotatable stiffening rib assembly 120 is pre-installed at the bottom of the hollow steel tube 110; the hook 114 is arranged on the moving path of the pivot shaft 123. The top of the support member 122 is connected to one end of a steel bar or rope 125, and the other end of the steel bar or rope 125 extends from the top opening of the hollow steel tube 110.

[0114] When the rib plate 121 is needed for reinforcement, the rotatable stiffening rib assembly 120 can be pulled up to the set position by steel bars or ropes, and the pivot shaft 123 on the support member 122 automatically retracts when it encounters the back of the hook 114, so that the support member 122 passes over the hook 114 and slides over the hook 114. The support member 122 is forced to move downward by the dead weight of the rod or cement, and the pivot shaft 123 slides into the slot of the hook 114 to form a pivot structure.

[0115] When a plurality of rotatable stiffening rib assemblies 120 are pre-installed at the bottom of the hollow steel pipe 110; Fig.25 As shown, the supporting members 122 of two adjacent rotatable stiffening rib assemblies 120 are connected by a flexible cable 126 , and the length of the flexible cable 126 is the same as the interval between the pre-opened holes 111 .

[0116] Preferably, when the rotatable stiffening rib assembly 120 is preinstalled at the bottom of the hollow steel pipe 110 , the rib plate 121 is generally parallel to the axial direction of the hollow steel pipe 110 .

[0117] Preferably, based on the above technical solution, a first guide groove 112 is provided on the inner wall of the hollow steel pipe 110 and on the opposite side of the pre-opening 111. The first guide groove 112 is provided along the axial direction of the hollow steel pipe 110, and a guide block is provided at the swing end for slidingly guiding with the first guide groove 112.

[0118] Furthermore, the pivot end of the support member 122 is provided with a fork-shaped head, a U-shaped groove is provided on the fork-shaped head, and sliding grooves are provided on both side walls of the U-shaped groove, and both ends of the pivot shaft 123 can be slidably inserted in the sliding grooves. Among them, the return spring can be arranged in the sliding groove, and the two ends are respectively connected to the pivot shaft 123 and the support member 122. A second guide groove 113 is provided on the inner wall of the hollow steel pipe 110 and on one side of the pre-opening 111. The second guide groove 113 and the first guide groove 112 are arranged oppositely, the fork-shaped head can be slidably inserted in the second guide groove 113, and the hook 114 is arranged in the second guide groove 113 to protrude inwardly along the radial direction of the steel pipe.

[0119] Preferably, two rows of pre-openings 111 are symmetrically arranged in the circumferential direction of the hollow steel tube 110 , and each row includes a plurality of pre-openings 111 arranged at intervals along the axial direction.

[0120] In the present invention, the rotatable stiffening rib assembly 120 is pre-installed at the bottom of the hollow steel pipe 110, and the pre-opening 111 can be used as a casting hole to inject reinforcing cement around the hollow steel pipe 110. Then, the rotatable stiffening rib assembly 120 is lifted to the setting position by a steel cable, and the support member 122 is forced to rotate by external force. The rib plate 121 extends out of the pre-opening 111 and is inserted into the cement around the steel pipe, thereby forming an integrated structure with the surrounding geology, greatly increasing the supporting force.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled building using folded plate-shaped connection nodes between a frame structure and a wall, characterized in that: The folded plate connection node between the frame structure and the wall includes: a frame, a wall and a folded plate connection component; The wall is arranged on the frame through a plurality of folding plate connection assemblies; The folding plate connection assembly comprises two symmetrically arranged connecting folding plates; The connecting folding plate is a connecting plate that is bent, and both ends of the connecting folding plate are connected to the frame and the wall respectively; The frame comprises a column and a beam; the wall is connected to the beam via the folding plate connection assembly; It also includes insulation panels and cantilever beams set outdoors; The connecting end of the cantilever beam is provided with an end plate; The cantilever beam is fixedly connected to the column through an end plate; The heat insulation board is arranged between the end plate and the column, and the heat insulation board is made of a heat-insulating material to block the heat conduction between the column and the end plate and the cantilever beam; A beam support plate is provided on the column and below the end plate, and the end plate is overlapped on the beam support plate; Also includes a wall insulation layer, the beam support plate is buried in the wall insulation layer; The wall insulation layer is flush with or higher than the outer side of the end plate; The wall comprises: a concrete inner page plate, a concrete outer page plate, a sandwich layer and a connecting block; the concrete inner page plate and the concrete outer page plate are arranged in parallel and spaced apart; the sandwich layer is clamped between the concrete inner page plate and the concrete outer page plate; a plurality of through holes are arranged on the concrete inner page plate, the sandwich layer and the concrete outer page plate; the connecting block is a lightweight concrete block, a plurality of connecting blocks are inserted in the through holes, and the connecting block horizontally penetrates the concrete inner page plate, the sandwich layer and the concrete outer page plate; It also includes a prefabricated cap and a pile body, the bottom of the prefabricated cap is connected to the pile body; the pile body includes a concrete pile and a steel pipe pile; on the horizontal projection plane, one or more steel pipe piles are arranged between two adjacent concrete piles; in the depth direction, the length of the concrete pile is greater than the length of the steel pipe pile; the steel pipe pile includes: a hollow steel pipe and a rotatable stiffening rib assembly; the rotatable stiffening rib assembly includes: a support member and a rib plate; the support member is an arc-shaped plate, and the rib plate is fixed on the outer surface of the support member; a pre-opened hole is arranged on the wall of the hollow steel pipe; the rotatable stiffening rib assembly is rotatably inserted in the hollow steel pipe; the rotatable stiffening rib assembly is forced to rotate by external force, the rib plate extends out of the hollow steel pipe from the pre-opened hole, and the outer side surface of the support member is attached to the inner wall of the hollow steel pipe; A plurality of pre-opened holes are provided on the wall of the hollow steel pipe at intervals along the axial direction of the hollow steel pipe; The support member includes a pivot end and a swing end, and the pivot end is provided with a pivot shaft pivotally connected to the inner wall of the hollow steel tube; a hook is provided on the inner wall of the hollow steel tube and above the pre-opened hole, and the hook opening is upward, and when the rotatable stiffening rib assembly swings from top to bottom, the pivot shaft of the support member is clamped into the hook, thereby forming a pivot structure; In a direction perpendicular to the rib plate, the pivot shaft is slidably disposed on the support member, and a return spring is disposed between the support member and the pivot shaft; the return spring is in a compressed state, tending to force the pivot shaft to move away from the swing end direction; The rotatable stiffening rib assembly is pre-installed at the bottom of the hollow steel tube; the hook is arranged on the moving path of the pivot shaft; the top of the support is connected to one end of the steel bar or rope, and the other end of the steel bar or rope extends from the top opening of the hollow steel tube; When rib reinforcement is required, the rotatable stiffening rib assembly is pulled up to the set position by steel bars or ropes, and the pivot shaft on the support automatically retracts when it encounters the back of the hook, so that the support passes over the hook of the hook slide; the support is forced to move downward by the deadweight of the rod or cement, and the pivot shaft slides into the slot of the hook to form a pivot structure.

2. The prefabricated building according to claim 1, characterized in that: The space between the two connecting folding plates of the folding plate connecting assembly is filled with heat-insulating material.

3. The prefabricated building according to claim 2, characterized in that: The thermal insulation material is foamed aluminum.

4. The prefabricated building according to claim 1, characterized in that: The connecting folding plate comprises connecting seat parts arranged at both ends and a bending part arranged in the middle; and a connecting hole is arranged on the connecting seat part.

5. The prefabricated building according to claim 4, characterized in that: The bending portion is arranged to be bent once or several times.

6. The prefabricated building according to claim 1, characterized in that: The folding plate connection assembly is arranged vertically, and a groove for accommodating the folding plate connection assembly is arranged on the wall.

7. The prefabricated building according to claim 4, characterized in that: The folding plate connecting assembly is arranged horizontally, the connecting seat portion of the connecting folding plate is abutted against the side surface of the wall, and the wall is suspended on the frame.

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