Integral cast assembly type concrete light partition wall plate and new type assembly type light steel villa

Abstract

The present application relates to a kind of whole pouring assembly type concrete light partition wall and new assembly type light steel villa, belong to the technical field of assembly type building production.It includes steel frame, the both sides of the steel frame are arranged with metal net, steel frame and metal net are covered in concrete block inside, characterized by: the concrete used in the concrete block is formed by pouring in the light foam concrete mixed with polystyrene particles.The present application has the following beneficial effects: the whole pouring assembly type concrete light partition wall is light in weight and has good sound insulation and heat insulation function;Construction speed is fast;It has good economy and applicability, and promotes the development of building technology.It has the advantage of being easy to splice, is preformed in the factory, and is spliced, connected and fixed on the construction site.

Description

Technical Field

[0001] This invention relates to a cast-in-place prefabricated lightweight concrete partition wall panel and a novel prefabricated light steel villa, belonging to the field of prefabricated building production technology. Background Technology

[0002] Prefabricated housing (modular housing) refers to housing built using industrialized production methods. This means that components such as stairs, exterior walls, balconies, and air conditioning panels are prefabricated in factories outside the construction site and then transported to the site for assembly. Steel structure and precast concrete panel prefabricated housing are widely used. Specifically, the structure involves assembling steel columns and beams into a steel frame, using precast concrete panels for the walls, and then rigidly assembling the steel frame structure and precast concrete panel walls.

[0003] Patent No. 201610668726.1 discloses a connection structure between a steel structure and a precast concrete slab. The steel structure includes columns and beams, with the end faces of the beams fixed to the columns. The beam body is placed inside the precast concrete slab, which includes a foamed concrete layer and a reinforced concrete layer. The foamed concrete layer fills around the beam, and the reinforced concrete layer surrounds both the foamed concrete layer and the beam. An elastic transition layer is provided between the beam and the underlying reinforced concrete layer. This effectively ensures that the deformation of the steel beam under working loads is not constrained by the lower wall, while also preventing cracks from forming between the beam and the precast concrete slab. Furthermore, the beam and precast concrete slab are integrated into a single structure, requiring only one hoisting operation during assembly, reducing hoisting difficulty and increasing work efficiency.

[0004] Current technology is not comprehensive and has the following drawbacks:

[0005] 1. Currently, precast concrete slabs are fixed to the columns, and beams are directly attached to the precast concrete slabs. Since the beams and slabs are two separate components, there is no secure connection between them. Over time, cracks easily appear between the beams and the slabs, severely affecting the wall quality.

[0006] 2. It does not have the advantage of being easy to assemble.

[0007] There is an urgent need for a monolithic cast-in-place lightweight concrete partition wall panel and a new type of prefabricated light steel villa to solve the above problems. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a cast-in-place prefabricated lightweight concrete partition wall panel and a new type of prefabricated light steel villa to meet the usage requirements.

[0009] This invention discloses a monolithic prefabricated lightweight concrete partition wall panel, comprising a steel frame with metal mesh arranged on both sides. The steel frame and metal mesh are encased within a concrete block. The key feature is that the concrete block is formed by casting lightweight foamed concrete mixed with polystyrene particles. This monolithic prefabricated lightweight concrete partition wall panel is lightweight and possesses excellent sound and heat insulation properties; it allows for rapid construction; and it exhibits excellent economic efficiency and applicability, thus promoting the development of building technology.

[0010] Preferably, the steel frame includes a first support frame and a second support frame spaced apart for supporting the metal mesh. The first support frame and the second support frame are connected by a spacing rod to create a gap that ensures the injection of concrete blocks. Specifically, the metal mesh consists of a first side mesh and a second side mesh. The first side mesh covers the outer surface of the first support frame, and the second side mesh covers the outer surface of the second support frame.

[0011] Preferably, the first support frame includes multiple spaced-apart front vertical support columns, and the second support frame includes multiple spaced-apart rear vertical support columns. Adjacent front and rear vertical support columns are connected by multiple spacing rods of different heights. Spacing rods at the same horizontal height are connected by built-in steel bars, and the length direction of the built-in steel bars is perpendicular to the length direction of the spacing rods.

[0012] Preferably, multiple sets of the built-in reinforcing bars are located on the same vertical plane, and the multiple sets of built-in reinforcing bars are connected by auxiliary positioning ribs.

[0013] Preferably, both the front vertical support column and the rear vertical support column are C-shaped components formed by cold bending of steel strips. The opening of the C-shaped component faces inward, and the belly of the C-shaped component is provided with a grout leakage hole to facilitate the flow of concrete.

[0014] Preferably, the construction steps of the monolithic precast lightweight concrete partition wall panel are as follows:

[0015] Step 1: Set up a set of front vertical support columns and a set of rear vertical support columns opposite each other, leaving a gap between them, and weld them into component 1 using a spacing retaining rod;

[0016] Step two, repeat step one, to process multiple sets of component one;

[0017] Step 3: Arrange multiple sets of components in parallel. The spacing retaining rods at the same horizontal height are connected by built-in steel bars. The length direction of the built-in steel bars is perpendicular to the length direction of the spacing retaining rods. The spacing retaining rods are welded to the built-in steel bars.

[0018] Step four: The webs of the multiple sets of front vertical support columns are in the same plane to form the fixing surface of the first side mesh. The first side mesh is welded and fixed to the front vertical support columns. The webs of the multiple sets of rear vertical support columns are in the same plane to form the fixing surface of the second side mesh. The second side mesh is welded and fixed to the rear vertical support columns to form component two.

[0019] Step 5, Mold assembly and treatment: Assemble the molds used in the manufacturing process together, and clean and pre-treat the inner surface of the molds by applying release oil.

[0020] Step 6: Prepare the concrete for pouring the concrete blocks;

[0021] Step 7: Install component 2 on the mold, mix the weighed concrete mortar materials to form a concrete mortar mixture, pour it into the mold, vibrate it to make it dense, smooth the surface of the concrete layer, let it stand to cure until it reaches the demolding strength, and then demold it; thus, a cast-in-place prefabricated lightweight concrete partition wall panel is obtained.

[0022] Preferably, the concrete preparation process for concrete block pouring is as follows: first, add water to the mixer, then add foaming agent, polystyrene particles and cement to form dry mortar, stir for 3 minutes to make a slurry for later use.

[0023] Preferably, the weight ratio of the lightweight concrete to the polystyrene particles is 100:(1-5).

[0024] A novel prefabricated light steel villa is characterized by including the aforementioned spliced ​​wall and wall-to-wall connectors, wherein adjacent spliced ​​walls are connected together by the wall-to-wall connectors, and the wall-to-wall connectors include vertically arranged columns, and the two sides of the columns are respectively connected to a spliced ​​wall by wall clamps A and wall clamps B.

[0025] Preferably, the column is an I-beam, comprising a left wing plate, a web plate, and a right wing plate, wherein the left wing plate is parallel to the right wing plate, and the web plate is perpendicularly connected between the left wing plate and the right wing plate.

[0026] Preferably, the wall clamping frame A includes a vertical connecting plate welded to the outer surface of the left wing plate. The vertical connecting plate is arranged along the length direction of the left wing plate and perpendicular to the left wing plate. It also includes a first clamping plate and a second clamping plate arranged opposite each other. The first clamping plate and the second clamping plate are clamped together on both sides of the wall and the wall is clamped between the first clamping plate and the second clamping plate by a first fixing bolt. Positioning plate A and positioning plate B are respectively arranged on both sides of the vertical connecting plate. Positioning plate A and positioning plate B are clamped together on both sides of the vertical connecting plate and the vertical connecting plate is clamped between positioning plate A and positioning plate B by a second fixing bolt. The first clamping plate and positioning plate A are connected by a transition plate A, and the second clamping plate and positioning plate B are connected by a transition plate B.

[0027] Preferably, the inner walls of the transition plate A and the transition plate B abut against the cross-section of the wall, and multiple sets of the first fixing bolts are arranged at vertical intervals along the first clamping plate and the second clamping plate, and multiple sets of the second fixing bolts are arranged at vertical intervals along the positioning plate A and the positioning plate B.

[0028] Preferably, the wall clamping frame B includes a vertical connecting plate B welded to the outer surface of the right wing plate. The vertical connecting plate B is arranged along the length direction of the right wing plate and perpendicular to the right wing plate. It also includes a third clamping plate and a fourth clamping plate arranged opposite each other. The third clamping plate and the fourth clamping plate are clamped on both sides of the wall and the wall is clamped between the third clamping plate and the fourth clamping plate by a third fixing bolt. Positioning plates C and D are respectively arranged on both sides of the vertical connecting plate B. The positioning plates C and D are clamped on both sides of the vertical connecting plate B and the vertical connecting plate B is clamped between the positioning plates C and the positioning plates D by a third fixing bolt. The third clamping plate and the positioning plate C are connected by a transition plate C, and the fourth clamping plate and the positioning plate D are connected by a transition plate D.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The monolithic precast lightweight concrete partition wall panel of the present invention is formed by casting lightweight foamed concrete mixed with polystyrene particles. The monolithic precast lightweight concrete partition wall panel is lightweight and has good sound insulation and heat insulation functions; it has fast construction speed; it has good economy and applicability, and promotes the development of building technology.

[0031] The novel prefabricated light steel villa of this invention connects adjacent splicing walls together through wall connectors. The wall connectors include vertically arranged columns, and the two sides of the columns are respectively connected to a splicing wall through wall clamps A and B. It has the advantage of easy splicing. The standard modular components are prefabricated in the factory and assembled, connected and fixed on the construction site.

[0032] The novel prefabricated light steel villa of the present invention includes a wall clamping frame A comprising a vertical connecting plate welded to the outer surface of the left wing plate. The vertical connecting plate is arranged along the length of the left wing plate and perpendicular to it. It also includes a first clamping plate and a second clamping plate arranged opposite each other. The first clamping plate and the second clamping plate are clamped together on both sides of the wall and the wall is clamped between the first clamping plate and the second clamping plate by a first fixing bolt. Positioning plates A and B are respectively provided on both sides of the vertical connecting plate. Positioning plates A and B are clamped together on both sides of the vertical connecting plate and the vertical connecting plate is clamped between positioning plates A and B by a second fixing bolt. The first clamping plate and positioning plate A are connected by a transition plate A, and the second clamping plate and positioning plate B are connected by a transition plate B, which is reliable and convenient. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0034] Figure 1 This is a structural schematic diagram of the monolithic precast lightweight concrete partition wall panel of the present invention;

[0035] Figure 2 for Figure 1 Top view of the central steel frame;

[0036] Figure 3 for Figure 1 Front view of the central steel frame;

[0037] Figure 4 This is a cross-sectional view of a new type of prefabricated light steel villa;

[0038] Figure 5 This is a structural diagram of the connectors between walls.

[0039] In the diagram: 1. Steel frame; 1.1. Front vertical support column; 1.2. Rear vertical support column; 2. Concrete block; 3. Metal mesh; 3.1. First side mesh; 3.2. Second side mesh; 4. Spacing rod; 5. Built-in reinforcing bar; 6. Auxiliary positioning rib plate; 7. Column; 8. Wall clamping frame A; 8.1. Vertical connecting plate; 8.2. First clamping plate; 8.3. Second clamping plate; 8.4. Transition plate A; 8.5. Transition plate B; 8.6. Positioning plate A; 8.7. Positioning plate B; 8.8. First fixing bolt; 8.9. Second fixing bolt; 9. Wall clamping frame B. Detailed Implementation

[0040] The present invention will now be further described with reference to the accompanying drawings:

[0041] The present invention will be further illustrated by specific embodiments below, but it is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Example

[0042] like Figure 1-3 As shown, the monolithic precast lightweight concrete partition wall panel includes a steel frame 1, with metal mesh 3 arranged on both sides of the steel frame 1. The steel frame 1 and the metal mesh 3 are wrapped inside the concrete block 2. The concrete block 2 is made of lightweight foamed concrete mixed with polystyrene particles.

[0043] Furthermore, the steel frame 1 includes a first support frame and a second support frame arranged at intervals for supporting the metal mesh 3. The first support frame and the second support frame are connected by a spacing retaining rod 4 to create a gap that ensures the injection of concrete blocks 2. The metal mesh 3 specifically consists of a first side mesh 3.1 and a second side mesh 3.2. The first side mesh 3.1 covers the outer surface of the first support frame, and the second side mesh 3.2 covers the outer surface of the second support frame.

[0044] Furthermore, the first support frame includes multiple spaced-apart front vertical support columns 7, and the second support frame includes multiple spaced-apart rear vertical support columns 1.2. Adjacent front vertical support columns 7 and rear vertical support columns 1.2 are connected by multiple spacing rods 4 of different heights. Spacing rods 4 at the same horizontal height are connected by built-in steel bars 5, and the length direction of the built-in steel bars 5 is perpendicular to the length direction of the spacing rods 4.

[0045] Furthermore, multiple sets of the built-in reinforcing bars 5 are located on the same vertical plane, and the multiple sets of built-in reinforcing bars 5 are connected by auxiliary positioning ribs 6.

[0046] Furthermore, both the front vertical support column 7 and the rear vertical support column 7 are C-shaped components formed by cold bending of steel strips. The opening of the C-shaped component faces inward, and the belly of the C-shaped component is provided with a grout leakage hole to facilitate the flow of concrete.

[0047] Furthermore, the construction steps for the monolithic precast lightweight concrete partition wall panel are as follows:

[0048] Step 1: Set up a set of front vertical support columns 7 and a set of rear vertical support columns 7 opposite each other, leaving a gap between them, and weld them into component 1 by means of spacing retaining rod 4;

[0049] Step two, repeat step one, to process multiple sets of component one;

[0050] Step 3: Arrange multiple sets of components in parallel. The spacing retaining rods 4 at the same horizontal height are connected by built-in steel bars 5. The length direction of the built-in steel bars 5 is perpendicular to the length direction of the spacing retaining rods 4. The spacing retaining rods 4 and the built-in steel bars 5 are welded together.

[0051] Step four, the webs of the multiple sets of front vertical support columns 7 are in the same plane to form the fixing surface of the first side net 3.1. The first side net 3.1 is welded and fixed to the front vertical support column 7. The webs of the multiple sets of rear vertical support columns 7 are in the same plane to form the fixing surface of the second side net 3.2. The second side net 3.2 is welded and fixed to the rear vertical support column (7) to form component two.

[0052] Step 5, Mold assembly and treatment: Assemble the molds used in the manufacturing process together, and clean and pre-treat the inner surface of the molds by applying release oil.

[0053] Step 6, prepare concrete blocks (2) for pouring;

[0054] Step 7: Install component 2 on the mold, mix the weighed concrete mortar materials to form a concrete mortar mixture, pour it into the mold, vibrate it to make it dense, smooth the surface of the concrete layer, let it stand to cure until it reaches the demolding strength, and then demold it; thus, a cast-in-place prefabricated lightweight concrete partition wall panel is obtained.

[0055] Furthermore, the concrete preparation process for concrete block 2 is as follows: first, add water to the mixer, then add foaming agent, polystyrene particles and cement to make dry mortar, stir for 3 minutes to make a slurry for later use.

[0056] Furthermore, the weight ratio of the lightweight concrete to the polystyrene particles is 100:(1-5).

[0057] Example 2

[0058] Reference Figure 4-5 A new type of prefabricated light steel villa includes the above-mentioned spliced ​​wall and wall connectors. Adjacent spliced ​​walls are connected together by wall connectors. The wall connectors include vertically arranged columns 7. The two sides of the columns 7 are connected to a spliced ​​wall by wall clamps A8 and B9 respectively.

[0059] Furthermore, the column 7 is an I-beam, comprising a left wing plate, a web plate, and a right wing plate. The left wing plate is parallel to the right wing plate, and the web plate is perpendicularly connected between the left wing plate and the right wing plate.

[0060] Furthermore, the wall clamping frame A8 includes a vertical connecting plate 8.1 welded to the outer surface of the left wing plate. The vertical connecting plate 8.1 is arranged along the length of the left wing plate and perpendicular to it. It also includes a first clamping plate 8.2 and a second clamping plate 8.3 arranged opposite to each other. The first clamping plate 8.2 and the second clamping plate 8.3 are clamped together on both sides of the wall and the wall is clamped between the first clamping plate 8.2 and the second clamping plate 8.3 by a first fixing bolt 8.8. The vertical connecting plate 8.1... Positioning plates A8.6 and B8.7 are respectively provided on both sides of the vertical connecting plate 8.1. Positioning plates A8.6 and B8.7 are clamped on both sides of the vertical connecting plate 8.1, and the vertical connecting plate 8.1 is clamped between positioning plates A8.6 and B8.7 by a second fixing bolt 8.9. The first clamping plate 8.2 and the positioning plate A8.6 are connected by a transition plate A8.4, and the second clamping plate 8.3 and the positioning plate B8.7 are connected by a transition plate B8.5.

[0061] Furthermore, the inner walls of the transition plate A8.4 and the transition plate B8.5 abut against the cross-section of the wall. Multiple sets of the first fixing bolts 8.8 are arranged vertically along the first clamping plate 8.2 and the second clamping plate 8.3, and multiple sets of the second fixing bolts 8.9 are arranged vertically along the positioning plate A8.6 and the positioning plate B8.7.

[0062] Furthermore, the wall clamping frame B9 includes a vertical connecting plate B welded to the outer surface of the right wing plate. The vertical connecting plate B is arranged along the length direction of the right wing plate and perpendicular to the right wing plate. It also includes a third clamping plate and a fourth clamping plate arranged opposite each other. The third clamping plate and the fourth clamping plate are clamped on both sides of the wall and the wall is clamped between the third clamping plate and the fourth clamping plate by a third fixing bolt. Positioning plates C and D are respectively arranged on both sides of the vertical connecting plate B. The positioning plates C and D are clamped on both sides of the vertical connecting plate B and the vertical connecting plate B is clamped between the positioning plates C and the positioning plates D by a third fixing bolt. The third clamping plate and the positioning plate C are connected by a transition plate C, and the fourth clamping plate and the positioning plate D are connected by a transition plate D.

[0063] The monolithic precast lightweight concrete partition wall panel of the present invention is formed by casting lightweight foamed concrete mixed with polystyrene particles. The monolithic precast lightweight concrete partition wall panel is lightweight and has good sound insulation and heat insulation functions; it has fast construction speed; it has good economy and applicability, and promotes the development of building technology.

[0064] The novel prefabricated light steel villa of this invention connects adjacent splicing walls together through wall connectors. The wall connectors include vertically arranged columns, and the two sides of the columns are respectively connected to a splicing wall through wall clamps A and B. It has the advantage of easy splicing. The standard modular components are prefabricated in the factory and assembled, connected and fixed on the construction site.

[0065] The novel prefabricated light steel villa of the present invention includes a wall clamping frame A comprising a vertical connecting plate welded to the outer surface of the left wing plate. The vertical connecting plate is arranged along the length of the left wing plate and perpendicular to it. It also includes a first clamping plate and a second clamping plate arranged opposite each other. The first clamping plate and the second clamping plate are clamped together on both sides of the wall and the wall is clamped between the first clamping plate and the second clamping plate by a first fixing bolt. Positioning plates A and B are respectively provided on both sides of the vertical connecting plate. Positioning plates A and B are clamped together on both sides of the vertical connecting plate and the vertical connecting plate is clamped between positioning plates A and B by a second fixing bolt. The first clamping plate and positioning plate A are connected by a transition plate A, and the second clamping plate and positioning plate B are connected by a transition plate B, which is reliable and convenient.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0067] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A novel prefabricated light steel villa, characterized in that, The system includes precast concrete lightweight partition wall panels and wall connectors. Adjacent wall panels are connected together via these connectors. Each connector includes a vertically positioned column, with a wall clamp A and a wall clamp B connecting the two sides of the column. The column is an I-beam and includes a left wing plate, a web plate, and a right wing plate. The left wing plate is parallel to the right wing plate, and the web plate is perpendicularly connected between the left and right wing plates. The wall clamp A includes a vertical connecting plate welded to the outer surface of the left wing plate. The vertical connecting plate is positioned along the length of the left wing plate and perpendicular to it. The system also includes a first clamping plate and a second clamping plate positioned opposite each other, clamping the wall panels together. The vertical connecting plate is positioned on both sides of the wall and clamped between the first and second clamping plates by the first fixing bolts. Positioning plates A and B are respectively provided on both sides of the vertical connecting plate. Positioning plates A and B are clamped on both sides of the vertical connecting plate and clamped between positioning plates A and B by the second fixing bolts. The first clamping plate and positioning plate A are connected by transition plate A, and the second clamping plate and positioning plate B are connected by transition plate B. The inner walls of transition plates A and B abut against the cross-section of the wall. Multiple sets of the first fixing bolts are arranged at vertical intervals along the first and second clamping plates, and multiple sets of the second fixing bolts are arranged at vertical intervals along the positioning plates A and B.

2. The novel prefabricated light steel villa according to claim 1, characterized in that, The monolithic precast lightweight concrete partition wall panel includes a steel frame, with metal mesh arranged on both sides of the steel frame. The steel frame and metal mesh are encased inside the concrete block. The feature is that the concrete block is made of lightweight foamed concrete mixed with polystyrene particles.

3. The novel prefabricated light steel villa according to claim 2, characterized in that, The steel frame includes a first support frame and a second support frame arranged at intervals to support the metal mesh. The first support frame and the second support frame are connected by a spacing rod to create a gap that ensures the injection of concrete blocks. The metal mesh is specifically divided into a first side mesh and a second side mesh. The first side mesh covers the outer surface of the first support frame, and the second side mesh covers the outer surface of the second support frame.

4. The novel prefabricated light steel villa according to claim 3, characterized in that, The first support frame includes multiple front vertical support columns spaced apart, and the second support frame includes multiple rear vertical support columns spaced apart. Adjacent front and rear vertical support columns are connected by multiple spacing rods of different heights. Spacing rods at the same horizontal height are connected by built-in steel bars, and the length direction of the built-in steel bars is perpendicular to the length direction of the spacing rods.

5. The novel prefabricated light steel villa according to claim 4, characterized in that, Both the front and rear vertical support columns are C-shaped components formed by cold bending of steel strips. The openings of the C-shaped components face inwards, and the belly of the C-shaped components is provided with grout leakage holes to facilitate the flow of concrete.

6. The novel prefabricated light steel villa according to claim 5, characterized in that, The construction steps for the monolithic precast lightweight concrete partition wall panel are as follows. Step 1: Set up a set of front vertical support columns and a set of rear vertical support columns opposite each other, leaving a gap between them, and weld them into component 1 using a spacing retaining rod; Step two, repeat step one, to process multiple sets of component one; Step 3: Arrange multiple sets of components in parallel. The spacing retaining rods at the same horizontal height are connected by built-in steel bars. The length direction of the built-in steel bars is perpendicular to the length direction of the spacing retaining rods. The spacing retaining rods are welded to the built-in steel bars. Step four: The webs of the multiple sets of front vertical support columns are in the same plane to form the fixing surface of the first side mesh. The first side mesh is welded and fixed to the front vertical support columns. The webs of the multiple sets of rear vertical support columns are in the same plane to form the fixing surface of the second side mesh. The second side mesh is welded and fixed to the rear vertical support columns to form component two. Step 5, Mold assembly and treatment: Assemble the molds used in the manufacturing process together, and clean and pre-treat the inner surface of the molds by applying release oil. Step 6: Prepare the concrete for pouring the concrete blocks; Step 7: Install component 2 on the mold, mix the weighed concrete mortar materials to form a concrete mortar mixture, pour it into the mold, vibrate it to make it dense, smooth the surface of the concrete layer, let it stand to cure until it reaches the demolding strength, and then demold it; thus, a cast-in-place prefabricated lightweight concrete partition wall panel is obtained.

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