An adjacent skew grid steel cylinder and its construction method

Abstract

The present invention relates to the technical field of long strip structural members for bearing loads, and discloses an adjacent skew grid steel tube, which is used as the core tube of a building with a frame-core tube structure. At least two rigid corner tubes aligned with the upper and lower ends of the skew grid steel tube are arranged on the side of the skew grid steel tube. The rigid corner tubes are vertically arranged rigid structures, and there are spaces between the rigid corner tubes and they are respectively fixedly connected to the skew grid steel tube. In the present invention, by using rigid corner tubes to fix on the two vertical edges of the skew grid steel tube, its flexural and torsional stiffness is improved, enabling it to be used as the core tube of a building, thus bringing three benefits: improving the vision inside the building, reducing the self-weight of the building, and shortening the construction period. In the present invention, since the floor slabs of the building expand outward with the skew grid steel tube as the center, the rigid corner tubes are mainly used to improve the stiffness of the skew grid steel tube and have a small cross-section requirement, so an integral climbing formwork construction equipment can be used for rapid construction.

Description

Technical Field

[0001] The present invention relates to the technical field of long strip structural members for bearing loads, and particularly to an adjacent type of skew grid steel tube and its construction method. Background Art

[0002] Buildings with a frame-core tube structure are a new type of building form, which includes a rigid core tube vertically penetrating the entire building. The floor slabs of the building expand outward with the core tube as the center, and are further restricted by a ring beam and outer frame columns on the periphery of the building.

[0003] Traditional core tubes are usually composed of reinforced concrete shear walls and have good stiffness. However, there is also an insurmountable problem, that is, the shear walls will completely block the view. If a building with a shear wall core tube is set near a landscape, then the view from inside the shear wall core tube to the landscape will be completely blocked, and the view from the shear wall around the core tube to the landscape will also be greatly affected. Its view is actually not much different from that of traditional reinforced concrete buildings, far inferior to that of pure steel structures. However, large-scale pure steel structures have their own limitations. Since the stiffness of pure steel structures themselves is inferior to that of reinforced concrete (steel structures belong to flexible structures in classification, while shear walls belong to rigid structures), the number of floors of pure steel structures in the vertical direction is severely limited (generally not exceeding 6 floors, and the maximum not exceeding 15 floors). If a steel structure building with a large number of floors is to be built, the core tube in the center of this steel structure building is essential.

[0004] In order to increase strength and improve appearance, sometimes the ring beam and outer frame columns on the periphery of the building are replaced with skew grid steel tubes. This is a grid-like steel structure similar to fishnet stockings in appearance, introducing diagonal members mainly subjected to axial forces, enabling the horizontal shear force of the floor to be mainly transmitted downward through the axial internal forces of the diagonal columns, with strong spatial coordination, improved torsional stiffness, weak shear lag effect, and even capable of providing a structural lateral stiffness greater than the content.

[0005] The skew grid steel tube is also a tubular structure and has better stiffness compared to other types of steel structures. If the skew grid steel tube is used as the core tube of a building, it will bring the following three benefits to the building:

[0006] First, the skew grid steel tube does not block the view, significantly improving the view from inside the building to the outside.

[0007] Second, it significantly reduces the self-weight of the building itself and can be successfully applied to various soft foundations.

[0008] Third, it can greatly shorten the construction period of the building (the assembly of steel components is much faster than the pouring of reinforced concrete).

[0009] However, the skew grid steel tube still belongs to a flexible structure. If the skew grid steel tube is used as the core tube of a building, its shear stiffness is sufficient, but its torsional and flexural stiffnesses cannot meet the requirements. The inventor found that if at least two vertical edges of the skew grid steel tube are fixed, the torsional and flexural stiffnesses of the skew grid steel tube will be greatly improved and it can be used as the core tube of a building. This discovery has been successfully applied to the large-span high-rise building of Hytera Global Headquarters in Shenzhen (on reclaimed land, facing the sea), enabling the building to obtain an excellent viewing perspective and greatly reducing its self-weight. Summary of the Invention

[0010] The present invention provides an adjacent skew grid steel tube and a construction method thereof.

[0011] The technical problem to be solved is that the stiffness of the skew grid steel tube in some directions is not sufficient to meet the stiffness requirements of being a core tube.

[0012] To solve the above technical problem, the present invention adopts the following technical solution: An adjacent skew grid steel tube, used as the core tube of a building with a frame-core tube structure, at least two rigid corner tubes aligned with the upper and lower ends of the skew grid steel tube are arranged on the side of the skew grid steel tube. The rigid corner tubes are vertically arranged rigid structures, and there is a spacing between each rigid corner tube and they are respectively fixedly connected to the skew grid steel tube.

[0013] Further, the cross-section of the skew grid steel tube is rectangular. The skew grid steel tube is enclosed by four concrete-filled steel tubes respectively arranged at the four vertical edges of the skew grid steel tube and a skew grid arranged at the four side elevation positions; two rigid corner tubes are arranged on the side of the skew grid steel tube, and the rigid corner tubes are arranged at the positions of two adjacent vertical edges of the skew grid steel tube and are arranged in a staggered pattern with the skew grid steel tube in the building cross-section.

[0014] Further, the rigid corner tube is enclosed by a plurality of rigid columns arranged at intervals along the circumferential direction of the rigid corner tube, and adjacent two rigid columns are fixedly connected by connecting beams arranged at intervals in the vertical direction; a steel beam grid fixedly connected to each rigid column in the corresponding rigid corner tube is also arranged in each rigid corner tube.

[0015] Furthermore, the cross-section of the rigid corner tube is rectangular, and the rigid columns include steel tube concrete columns arranged at the four corners of the cross-section of the rigid corner tube, and shear wall columns arranged at the remaining positions. The connecting beams of the same rigid corner tube on the same horizontal plane are connected as a whole to form a steel ring beam, and the four corners of the steel ring beam are welded to the steel tube concrete column and wrapped by the concrete of each shear wall column; the steel beam grid and the steel ring beam correspond to each floor slab of the building one by one and are flush with the corresponding floor slabs, and the edge of the steel beam grid penetrates the concrete of the shear wall column and is fixedly connected to the steel ring beam; the steel beam grids in the two rigid corner tubes extend outward and are connected as a whole.

[0016] Furthermore, the diagonal grid steel cylinder is arranged in a building with a rectangular cross-section, each side facade of the building corresponds to each side facade of the diagonal grid steel cylinder one by one and is parallel to the corresponding side facade in the diagonal grid steel cylinder, one side facade of the building is arranged close to the landscape and is recorded as the landscape-facing surface, and the side facade of the building facing away from the landscape is recorded as the background surface, and the rigid corner tubes are arranged at two vertical edges of the diagonal grid steel cylinder close to the background surface; each of the two rigid corner tubes has a vertical edge that overlaps with a vertical edge of the diagonal grid steel cylinder, and at each overlapping position, the rigid corner tube and the diagonal grid steel cylinder share a steel tube concrete column.

[0017] Furthermore, the two side walls of the diagonal grid steel tube are parallel to the view surface and stretch outward from the inside of the building and are flush with the view surface and the background surface respectively. In the overlapping part of the diagonal grid steel tube and the rigid angle tube, the diagonal grid steel tube is composed of the side walls of the rigid angle tube; a steel ring beam is arranged on the outer periphery of each floor slab of the building where the diagonal grid steel tube is located, and in the two side walls of the diagonal grid steel tube that are flush with the view surface and the background surface, the rods of the diagonal grid steel tube are cross-arranged and fixedly connected with the steel ring beam.

[0018] Furthermore, the diagonal grids in the side walls of the diagonal grid steel cylinder are diamond grids, and each diamond grid is provided with a rod connecting two diagonal points in the horizontal direction of the diamond grid, and is recorded as a hoop rod; the floor of the building where the diagonal grid steel cylinder is located is arranged at a diagonal position in the horizontal direction of the diamond grid, and the hoop rod is a floor beam in the floor, and the hoop rods under the same floor are connected as a whole to form a steel ring beam arranged around the diagonal grid steel cylinder.

[0019] A construction method of an adjacent diagonal grid steel cylinder is used for the above-mentioned adjacent diagonal grid steel cylinder and comprises the following steps:

[0020] Step 1: After the foundation construction is completed, construct two rigid corner tubes section by section from bottom to top;

[0021] Step 2: After the concrete at the bottom of the two rigid angle cylinders has undergone final setting, construct the skewed grid steel cylinders section by section from bottom to top and connect them to the rigid angle cylinders. The construction of the skewed grid steel cylinders is carried out simultaneously with that of the rigid angle cylinders, and the construction progress of the skewed grid steel cylinders lags behind that of the rigid angle cylinders, so that the concrete in the rigid angle cylinders at the connection position has undergone final setting when connecting the rigid angle cylinders and the skewed grid steel cylinders;

[0022] Step 3: Construct each floor slab of the building, and the construction of the floor slab lags behind that of the skewed grid steel cylinders by 4 - 6 floors.

[0023] Furthermore, embedded parts for connecting the steel beam grid and the skewed grid steel cylinders are provided in the shear wall columns. When constructing each segment of the rigid angle cylinder, first install the concrete-filled steel tubular columns at the four corner positions, then bind the steel reinforcement cages in the shear wall columns and weld the connecting beams to the concrete-filled steel tubular columns, then fix the embedded parts to the connecting beams, then pour the concrete of the shear wall columns, and finally install the steel beam grid.

[0024] Furthermore, in the skewed grid steel cylinders, connectors are respectively arranged at the positions of the intersections of each member. The connector is a structure with multiple profiled steel segments extending outward from the center of the member intersection point and corresponding to each member at the intersection point one by one, and the ends of the extended profiled steel segments are provided with docking ports for connecting with the corresponding members; when building the skewed grid steel cylinders, the following method is used to control the position accuracy of the connectors:

[0025] Establish a coordinate control network using a total station. Three coordinate control points are set for each docking port of the connector. When hoisting the connector, adjust its position and attitude to make the actual coordinates of each coordinate control point consistent with its set coordinates. After the connector is installed, use the total station to recheck the coordinate control points again.

[0026] Compared with the prior art, a contiguous skewed grid steel cylinder and its construction method of the present invention have the following beneficial effects:

[0027] In the present invention, by using rigid angle cylinders to fix on the two vertical edges of the skewed grid steel cylinder, its flexural and torsional stiffness is improved, enabling it to be used as the core cylinder of the building, thus bringing three benefits of improving the vision inside the building, reducing the self-weight of the building, and shortening the construction period;

[0028] In the present invention, since the floor slabs of the building expand outward with the skewed grid steel cylinder as the center, the rigid angle cylinder is mainly used to improve the stiffness of the skewed grid steel cylinder and does not require too large a cross-sectional area (the sum of the two is less than one-fourth of the cross-sectional area of the skewed grid steel cylinder), so the integral climbing form construction equipment used in chimneys or elevator shafts can be used for rapid construction;

[0029] In the present invention, since the skew grid steel tube needs to be directly connected to the rigid angle tube, the installation accuracy requirement is much higher than when it is used as the outer frame enclosure structure (because the movable range is smaller, there is no longer a floor with hinged joints in between, but they are directly rigidly connected). By setting connectors at the intersection positions of the members of the skew grid steel tube, ensuring that the positions of the three coordinate control points of each docking port of the connector meet the requirements, the tolerances that occur in the entire skew grid steel tube will not accumulate (because the position of each member intersection point is precisely controlled, and the tolerances cannot cross the member intersection points and accumulate), the installation accuracy can meet the requirements, and the entire building can be assembled smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a top view of an adjacent skew grid steel tube of the present invention;

[0031] Figure 2 is a top view of a building adopting the present invention;

[0032] Figure 3 is a front view of a building adopting the present invention;

[0033] Figure 4 is a schematic diagram of the installation method of an attached tower crane;

[0034] Figure 5 is a schematic diagram of the structure of the connector. This figure shows a "cross" - shaped connector, and the "Y" - shaped and "long" - shaped connectors are the same in principle;

[0035] Figure 6 is a schematic diagram of the arrangement of concrete - filled steel tube columns. The black blocks in the figure are concrete - filled steel tube columns. For the convenience of reading the drawing, the outlines of the skew grid steel tube and the rigid angle tube are marked with dashed boxes;

[0036] Among them, 1 - skew grid steel tube, 11 - connector, 2 - rigid angle tube, 21 - shear wall column, 3 - attached tower crane, 31 - diagonal brace. DETAILED DESCRIPTION OF THE INVENTION

[0037] As Figures 1-3 shown, an adjacent skew grid steel tube is used as the core tube of a building with a frame - core tube structure. At least two rigid angle tubes 2 aligned with the upper and lower ends of the skew grid steel tube 1 are arranged on the side of the skew grid steel tube 1. The rigid angle tubes 2 are vertically arranged rigid structures, and there are intervals between the rigid angle tubes 2 and they are respectively fixedly connected to the skew grid steel tube 1.

[0038] When the diagonal grid steel tube 1 is very long, its shear stiffness can still meet the requirements, but its bending and torsion stiffness are not enough to meet the requirements. Therefore, a rigid angle tube 2 is used here to fix the two vertical edges of the diagonal grid steel tube 1 that are far apart. After the two vertical edges are fixed, their torsion and bending are restricted, so that they have sufficient torsion and bending stiffness and can be used as the core tube of the building. The rigid angle tube 2, as the name suggests, is a rigid structure. The most common rigid structure in a building is the structure formed by shear walls. Since only the position of the vertical edge of the diagonal grid steel tube needs to be restricted here, the torsion of this vertical edge itself will not cause the overall torsion of the diagonal grid steel tube. Therefore, there is no requirement for the torsion stiffness of the rigid angle tube 2 itself, as long as there is sufficient bending stiffness. Therefore, the rigid angle tube 2 does not need to be a tubular structure completely surrounded by shear walls, but can be a structure surrounded by multiple discontinuous shear walls, so that the rigid angle tube 2 can also have a view to the outside. In this embodiment, the cross-section of the two rigid corner tubes 2 added together is only less than 1 / 4 of the cross-section area of ​​the oblique grid steel tube 1 .

[0039] The cross section of the diagonal grid steel cylinder 1 is rectangular. The diagonal grid steel cylinder 1 is surrounded by four steel tube concrete columns respectively arranged at the four vertical edges of the diagonal grid steel cylinder 1 and diagonal grids arranged at four side facades. Two rigid corner tubes 2 are arranged on the side of the diagonal grid steel cylinder 1. The rigid corner tubes 2 are arranged at the positions of two adjacent vertical edges of the diagonal grid steel cylinder 1 and are arranged in a herringbone shape with the diagonal grid steel cylinder 1 on the building cross section.

[0040] The advantage of this arrangement is that in many cases, the landscape near the building is only on one side of the building. If the rigid corner tube 2 is set on the side away from the landscape, the impact of the rigid corner tube 2 on the field of vision can be greatly reduced. Although the rigid corner tube 2 selected in the present application is actually surrounded by a circle of columns and will not cause serious blocking effects, it still has a certain impact.

[0041] The rigid angle tube 2 is surrounded by a plurality of rigid columns spaced apart along the circumference of the rigid angle tube 2, and two adjacent rigid columns are fixedly connected by connecting beams spaced apart along the vertical direction; its bending stiffness is similar to that of a structure entirely surrounded by shear walls.

[0042] Each rigid corner tube 2 is also provided with a steel beam grid which is fixedly connected to each rigid column in the rigid corner tube 2 .

[0043] In this embodiment, the cross-section of the rigid corner tube 2 is rectangular, and the rigid columns include steel tube concrete columns arranged at the four corners of the cross-section of the rigid corner tube 2, and shear wall columns 21 arranged at the remaining positions. The connecting beams of the same rigid corner tube 2 on the same horizontal plane are connected as a whole to form a steel ring beam, and the four corners of the steel ring beam are welded to the steel tube concrete column and are wrapped by the concrete of each shear wall column 21; the steel beam grid and the steel ring beam correspond to each floor slab of the building one by one and are flush with the corresponding floor slabs, and the edge of the steel beam grid penetrates the concrete of the shear wall column 21 and is fixedly connected to the steel ring beam; the steel beam grids in the two rigid corner tubes 2 extend outward and are connected as a whole; each of the two rigid corner tubes 2 has a vertical edge that overlaps with a vertical edge of the diagonal grid steel tube 1, and at each overlapping position, the rigid corner tube 2 and the diagonal grid steel tube 1 share a steel tube concrete column.

[0044] The shear wall column 21 here is actually a very narrow reinforced concrete shear wall, whose width is usually no more than five times the thickness, and no more than 10 times the thickness (on the background surface), and the width direction is set along the extension direction of the connecting beam, so it is called a column here. The rigid columns here can also all be steel tube concrete columns, but this is not easy to connect, because welding is more troublesome than burying them in concrete. Shear wall columns 21 are used here to form rigid corner tubes 2. In addition to the advantage of easy connection mentioned above, another point is that they can be quickly poured in batches using an integrated climbing formwork. The shared steel tube concrete column makes the rigid corner tube 2 more tightly connected to the diagonal grid steel tube 1.

[0045] Although the rigid corner tube 2 here is not a core tube, it also has a steel beam grid connected to the shear wall like a conventional shear wall core tube (the arrangement density is higher than the floor beams of the rest, and the grids inside are multiple square grids of varying sizes). Since the shear wall columns 21 around the rigid corner tube 2 are actually similar to the structure of reinforced concrete columns, such slender reinforced concrete columns are unstable. Here, the shear wall columns 21 in the two rigid corner tubes 2 are connected together with a steel beam grid to enhance stability. Note that although the steel beam grid here is present on each floor and is actually part of the floor beam, its distribution density is higher than that of the rest of the floor beams, because the cross-sectional area of ​​the rigid corner tube 2 is small. If its distribution density is the same as that of the rest of the floor beams, there will be few grids inside.

[0046] The oblique grid steel cylinder 1 is arranged in a building with a rectangular cross section, and each side elevation of the building corresponds to each side elevation of the oblique grid steel cylinder 1 one by one and is parallel to the corresponding side elevation in the oblique grid steel cylinder 1. One side elevation of the building is arranged close to the landscape and is recorded as the landscape-facing surface, and the side elevation of the building facing away from the landscape is recorded as the background surface, and the rigid angle tube 2 is arranged at the position of the two vertical edges of the oblique grid steel cylinder 1 close to the background surface. In this embodiment, the landscape is the sea view, and the high-rise building facing the landscape is a sea view room set on a seaside beach or a land reclamation area. The building in the present invention has a self-weight close to that of a pure steel structure building, which is much lighter than a reinforced concrete structure building, and is particularly suitable for use on various soft foundations. The use scenario in this embodiment is the Hytera Global Headquarters Building built on the land generated by land reclamation in Shenzhen.

[0047] The two side walls of the diagonal grid steel cylinder 1 parallel to the view surface are stretched outward from the inside of the building and are flush with the view surface and the background surface respectively. In the overlapping part of the diagonal grid steel cylinder 1 and the rigid angle cylinder 2, the diagonal grid steel cylinder 1 is composed of the side walls of the rigid angle cylinder 2; steel ring beams are arranged on the outer periphery of each floor slab of the building where the diagonal grid steel cylinder 1 is located, and in the two side walls of the diagonal grid steel cylinder 1 flush with the view surface and the background surface, the rods of the diagonal grid steel cylinder 1 are cross-arranged and fixedly connected with the steel ring beams.

[0048] After the diagonal grid steel tube 1 is horizontally stretched in this way, there are two benefits. First, the appearance of the building is improved. Second, the diagonal grid steel tube 1, the rigid angle tube 2 and the building outer frame (that is, the structure of the outer periphery of the building) have overlapping parts, making the three connections more closely connected, improving the transmission of force and structural rigidity. For a conventional frame-core tube structure building, the core tube and the outer frame of the building are separated by a floor slab, and the beam-column node between the floor beam in the floor slab and the outer frame is usually a hinged node. The rigidity of the building depends almost entirely on the core tube, and the outer frame does not help much. Here, the three parts are directly connected as one, and each part plays a role in improving the rigidity of the building.

[0049] The diagonal grids in the side walls of the diagonal grid steel cylinder 1 are diamond grids, and each diamond grid is provided with a rod connecting two diagonal points in the horizontal direction of the diamond grid, and is recorded as a hoop rod; the floor of the building where the diagonal grid steel cylinder 1 is located is set at the diagonal position in the horizontal direction of the diamond grid, and the hoop rod is the floor beam in the floor, and the hoop rods under the same floor are connected as a whole to form a steel ring beam arranged around the diagonal grid steel cylinder 1.

[0050] The hoop rod here not only prevents the diamond-shaped lattice from deforming, thereby improving the rigidity, but also acts as a reinforcement ring similar to that of a chemical container when connected together.

[0051] A construction method of an adjacent diagonal grid steel cylinder is used for the above-mentioned adjacent diagonal grid steel cylinder and comprises the following steps:

[0052] Step 1: After the foundation construction is completed, two rigid angle tubes 2 are constructed section by section from bottom to top;

[0053] Step 2: After the concrete at the bottom of the two rigid angle tubes 2 is finally set, the oblique grid steel tube 1 is constructed section by section from bottom to top and connected with the rigid angle tube 2. The construction of the oblique grid steel tube 1 is carried out together with the construction of the rigid angle tube 2. The construction progress of the oblique grid steel tube 1 lags behind that of the rigid angle tube 2, so that the concrete in the rigid angle tube 2 at the connection position has been finally set when the rigid angle tube 2 is connected with the oblique grid steel tube 1;

[0054] The rigid angle tube 2 is used to limit the positions of the two edges of the diagonal grid steel tube 1. Its shape must strictly meet the requirements, otherwise the components connected to it will be affected. Therefore, the rigid angle tube 2 must be installed with the auxiliary components above after the concrete has finally set. Otherwise, the concrete will be disturbed during the installation process, causing it to deform.

[0055] Step 3: Construct the floor slabs of each floor of the building. The construction of the floor slabs lags behind the construction of the diagonal grid steel cylinder 1 by 4-6 floors. The floor slabs cannot be constructed after the rigid angle cylinder 2 and the diagonal grid steel cylinder 1 are completed. Otherwise, the construction period will be extended, and many materials will need to be transported over long distances (the floor slabs of high-rise buildings usually serve as construction platforms and temporary material yards during the construction process. Even if the construction of the floor slabs lags behind, it can shorten the material transportation distance). Third, the rigid angle cylinder 2 and the diagonal grid steel cylinder 1 are unstable.

[0056] The shear wall column 21 is provided with embedded parts for connecting the steel beam grid and the diagonal grid steel tube 1, such as Figure 6 As shown, when the rigid corner tube 2 is constructed in each section, the steel tube concrete columns at the four corners are installed first, then the steel cage in the shear wall column 21 is tied and the connecting beam is welded to the steel tube concrete column, then the embedded parts are fixed to the connecting beam, and then the concrete of the shear wall column 21 is poured, and finally the steel beam grid (including the inside of the rigid corner tube 2 and between two rigid corner tubes 2) is installed. Here, a climbing formwork is needed to pour concrete, and if the steel beam grid is installed first, the climbing formwork cannot be used. Therefore, here, the embedded parts are installed first, leaving an interface on the shear wall column 21, and then the steel beam grid and other structures are installed after the concrete is poured. The embedded parts can be fixed to the connecting beam by welding or other methods, so that it can be prevented from being distorted during the pouring process and the connection strength can be increased.

[0057] Of course, if climbing formwork is not used for concrete pouring, the installation of the steel beam grid can be carried out before the concrete pouring.

[0058] like Figure 4 As shown, for the rigid corner tube 2, its side needs to be equipped with an attached tower crane 3 as a construction tool like a conventional shear wall core tube, but because it is not closed, it cannot effectively bear the attached tower crane 3, so steel tube concrete columns are arranged at the four corners of the rigid corner tube 2 and connected with diagonal braces 31. When the tower crane is installed, the cantilevered part of the tower crane needs to be connected to the two steel tube concrete columns close to the tower crane through the diagonal braces 31 extending obliquely downward, and the connection point between it and the shear wall column 21 needs to be connected to the two steel tube concrete columns far away from the tower crane through the diagonal braces 31 extending obliquely downward.

[0059] In the oblique grid steel cylinder 1, connectors 11 are respectively provided at the intersections of the bars. Figure 5 As shown, the connector 11 is a structure in which a plurality of steel sections corresponding to the respective rods at the intersection position are extended outward from the intersection point of the rods as the center, and the end of the extended steel section has a docking port for connecting with the corresponding rod; and the steel section and the corresponding rod are steel sections of the same specification; the connector 11 is welded by steel sections, and the steel sections of the connector 11 are all provided with inner partitions, and if the connector 11 contains steel sections that separate other steel sections, a connecting plate for connecting the separated steel sections is provided inside the partition position;

[0060] The connector 11 here is equivalent to a structure formed by cutting a circle around the intersection of the rods of the diagonal grid steel cylinder 1. Depending on the intersection, there are three shapes: "M" shape, "Y" shape and "L" shape. The diagonal grid steel cylinder 1 is also constructed from bottom to top. When each section of the diagonal grid steel cylinder 1 is built, the steel tube concrete columns on the four vertical edges are first installed in place, and then the diagonal grid in the middle is installed. From top to bottom, a layer of connectors 11, a layer of rods, another layer of connectors 11, and another layer of rods are built in this order. Note that the rods in this article include all long steel members including steel beams, steel columns, steel tube concrete columns, and diagonal braces 31.

[0061] Since the steel tube concrete columns are also rigid columns and can be installed quickly, both the steel tube concrete columns at the four corners of the diagonal grid steel tube 1 and the steel tube concrete columns at the four corners of the rigid corner tube 2 need to be installed first, so as to provide a precise installation position for the installation of other components. Two steel tube concrete columns are also set in the steel beam grid between the two rigid corner tubes 2, and they play the same role.

[0062] When the oblique grid steel cylinder 1 is constructed, the position accuracy of the connector 11 is controlled by the following method:

[0063] A coordinate control network is established using a total station. Three coordinate control points are set at each docking interface of the connector 11 (three points determine a plane, that is, the docking surface). When the connector 11 is hoisted, its position and attitude are adjusted so that the actual coordinates of each coordinate control point are consistent with the set coordinates. After the installation of the connector 11 is completed, the total station is used to recheck the coordinate control points.

[0064] Among the two side walls of each rigid angle cylinder 2 perpendicular to the background surface, the rigid columns are arranged at the vertical edges of the rigid angle cylinder 2. In this way, very wide doors are left on these two side walls, which can facilitate the exchange of construction materials with the outside world. At the same time, jump boards can be laid on the high-density steel beams inside and between the two rigid angle cylinders 2 to form a temporary construction platform for carrying personnel and construction materials, and the above-mentioned doors are located at the end of this platform.

[0065] The embodiments described above are only used to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An adjacent skew grid steel tube, which is used as the core tube of a building with a frame-core tube structure, Characterized in that: At least two rigid corner tubes (2) aligned with the upper and lower ends of the skew grid steel tube (1) are arranged on the side of the skew grid steel tube (1). The rigid corner tubes (2) are vertically arranged rigid structures. There is a spacing between the rigid corner tubes (2), and they are respectively fixedly connected to the skew grid steel tube (1); The cross-section of the skew grid steel tube (1) is rectangular. The skew grid steel tube (1) is enclosed by four concrete-filled steel tubes arranged at the four vertical edges of the skew grid steel tube (1) and a skew grid arranged at the four side elevation positions. Two rigid corner tubes (2) are arranged on the side of the skew grid steel tube (1). The rigid corner tubes (2) are arranged at the positions of two adjacent vertical edges of the skew grid steel tube (1), and are arranged in a staggered pattern with the skew grid steel tube (1) in the building cross-section.

2. An adjacent skew grid steel tube according to claim 1, Characterized in that: The rigid corner tube (2) is enclosed by a plurality of rigid columns arranged at intervals in the circumferential direction of the rigid corner tube (2). Adjacent two rigid columns are fixedly connected by connecting beams arranged at intervals in the vertical direction; a steel beam grid fixedly connected to each rigid column in the corresponding rigid corner tube (2) is also arranged in each rigid corner tube (2).

3. An adjacent skew grid steel tube according to claim 2, Characterized in that: The cross-section of the rigid corner tube (2) is rectangular. The rigid columns include concrete-filled steel tubes arranged at the four corners of the cross-section of the rigid corner tube (2), and shear wall columns (21) arranged at the remaining positions. The connecting beams on the same horizontal plane in the same rigid corner tube (2) are connected into one body to form a steel ring beam. The four corners of the steel ring beam are welded to the concrete-filled steel tubes, and are wrapped by the concrete of each shear wall column (21); the steel beam grid and the steel ring beam correspond to each floor of the building one by one and are flush with the corresponding floor. The edge of the steel beam grid penetrates the concrete of the shear wall column (21) and is fixedly connected to the steel ring beam; the steel beam grids in the two rigid corner tubes (2) extend outwards and are connected into one body; each of the two rigid corner tubes (2) has a vertical edge overlapping with a vertical edge of the skew grid steel tube (1), and at each overlapping position, the rigid corner tube (2) and the skew grid steel tube (1) share a concrete-filled steel tube.

4. An adjacent skew grid steel tube according to claim 1, Characterized in that: The skew grid steel tube (1) is arranged in a building with a rectangular cross-section. Each side elevation of the building corresponds to each side elevation of the skew grid steel tube (1) one by one and is parallel to the corresponding side elevation in the skew grid steel tube (1). One side elevation of the building is close to the landscape and is denoted as the landscape-facing side, and the side elevation of the building facing away from the landscape is denoted as the background side. The rigid corner tubes (2) are arranged at the positions of two vertical edges of the skew grid steel tube (1) close to the background side.

5. An adjacent skew grid steel tube according to claim 4, Characterized in that: The two side walls of the skew grid steel cylinder (1) parallel to the landscape-facing surface extend outward from the interior of the building and are flush with the landscape-facing surface and the background surface respectively. In the overlapping part of the skew grid steel cylinder (1) and the rigid corner cylinder (2), the skew grid steel cylinder (1) is composed of the side walls of the rigid corner cylinder (2); a steel ring beam is provided on the outer periphery of each floor slab of the building where the skew grid steel cylinder (1) is located. Among the two side walls of the skew grid steel cylinder (1) that are flush with the landscape-facing surface and the background surface, the members of the skew grid steel cylinder (1) are arranged crosswise with the steel ring beam and fixedly connected.

6. A contiguous skew grid steel cylinder according to claim 1, characterized in that: The skew grid in the side wall of the skew grid steel cylinder (1) is a diamond grid, and in each diamond grid, there is a member connecting the two diagonal points in the horizontal direction of the diamond grid, which is denoted as the hoop rod; the floor slab of the building where the skew grid steel cylinder (1) is located is arranged at the diagonal position in the horizontal direction of the diamond grid, and the hoop rod is the floor beam in the floor slab. The hoop rods under the same floor slab are connected as a whole and form a steel ring beam arranged around the skew grid steel cylinder (1) for one week.

7. A construction method of a contiguous skew grid steel cylinder, characterized in that: It is used for a contiguous skew grid steel cylinder as described in claim 3, and includes the following steps: Step 1: After the foundation construction is completed, construct the two rigid corner cylinders (2) section by section from bottom to top; Step 2: After the concrete at the bottom of the two rigid corner cylinders (2) has finally set, construct the skew grid steel cylinder (1) section by section from bottom to top and connect it with the rigid corner cylinder (2). The construction of the skew grid steel cylinder (1) is carried out together with the construction of the rigid corner cylinder (2), and the construction progress of the skew grid steel cylinder (1) lags behind that of the rigid corner cylinder (2) so that the concrete in the rigid corner cylinder (2) at the connection position has finally set when the rigid corner cylinder (2) is connected to the skew grid steel cylinder (1); Step 3: Construct each floor slab of the building, and the construction of the floor slab lags behind the construction of the skew grid steel cylinder (1) by 4 - 6 floors.

8. A construction method of a contiguous skew grid steel cylinder according to claim 7, characterized in that: Embedded parts for connecting the steel beam grid and the skew grid steel cylinder (1) are provided in the shear wall column (21). When constructing each segment of the rigid corner cylinder (2), first install the concrete-filled steel tubular columns at the four corner positions, then bind the steel reinforcement cage in the shear wall column (21) and weld the connecting beam to the concrete-filled steel tubular columns, then fix the embedded parts to the connecting beam, then pour the concrete of the shear wall column (21), and finally install the steel beam grid.

9. A construction method of a contiguous skew grid steel cylinder according to claim 7, characterized in that: In the skew grid steel cylinder (1), connectors (11) are respectively arranged at the positions of the intersections of the members. The connector (11) is a structure with multiple steel section segments extending outward from the center of the member intersection point and corresponding to each member at the intersection point one by one. The end of the extended steel section segment is provided with a docking port for connecting with the corresponding member; when building the skew grid steel cylinder (1), the following method is adopted to control the position accuracy of the connector (11): Use a total station to establish a coordinate control network. Set three coordinate control points for each docking port of the connector (11). When hoisting the connector (11), adjust its position and attitude to make the actual coordinates of each coordinate control point consistent with its set coordinates. After the installation of the connector (11) is completed, use the total station to recheck the coordinate control points.

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