A semi-surrounding eccentric core tube and its construction method

Abstract

The present invention relates to the technical field of support members made of two or more materials, and discloses a semi-surrounding eccentric core tube and a construction method thereof. By moving the core tube originally located at the center of the building to the side of the building facing away from the landscape, the core tube no longer blocks the viewing field inside the building after the movement. At the same time, in order to overcome the influence of the movement of the core tube position on the bearing capacity in the vertical direction, a skew grid steel tube is sandwiched between two eccentric core tubes and shares the side wall with them, and the skew grid steel tube is used to expand the stress positions for supporting the floor slabs, so as to avoid the yield of the floor beams due to excessive span. By changing the structure of the eccentric core tube from being completely surrounded by shear walls to being surrounded by columns, there is also sufficient viewing field inside the core tube; at the same time, by rigidly connecting the two core tubes and the skew grid steel tube into a whole, the problem of insufficient stiffness of a single eccentric core tube or a single skew grid steel tube is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of support members made of two or more materials, and particularly to a semi-surrounding eccentric core tube and a construction method thereof. Background Art

[0002] For buildings close to the landscape, in addition to the structural strength requirements and appearance requirements that conventional buildings need to meet, there are often higher vision requirements compared to conventional buildings. Because such buildings not only serve as a venue for people's activities but also as an observation platform. Taking a sea-view room as an example, on the side close to the sea, there generally needs to be a large area of floor-to-ceiling windows, or even the entire wall is a curtain wall.

[0003] For buildings using load-bearing walls as load-bearing members, the load-bearing walls will undoubtedly seriously block the view looking out from the building. Therefore, more of the viewing buildings are steel structure buildings. However, large-scale pure steel structures have their own limitations. Since the stiffness of pure steel structures 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 you want to build a steel structure building with more floors, a core tube surrounded by a reinforced concrete shear wall is often required in the center of this steel structure building. But this brings two new problems. One is that there is no view looking out from the core tube at all, resulting in this part of the area not having the viewing function. The other is limited by the stiffness problem of the steel structure, the span of the entire floor cannot be too large, and it can only expand a relatively narrow circle outward around the core tube. That is to say, only the area around the core tube has a view looking out in the whole building. Due to the occlusion of the core tube, which accounts for a large proportion in the cross-section, only the part close to the landscape in this circle of area can have sufficient viewing vision, and other parts will be occluded by the core tube more or less.

[0004] The core tube is called the core tube because it needs to be set in the middle of the building so that the floor beams can expand evenly outward centered on it. The main function of the core tube is to rely on its own stiffness to bear the horizontal loads of the building. Although it also bears a part of the vertical loads, the inventor found that this part of the loads does not necessarily have to be borne effectively when the core tube is located at the center of the building, and the requirement for structural rigidity to bear the vertical loads is much lower than that to bear the horizontal loads, and it is not necessarily necessary to use a shear wall core tube. Summary of the Invention

[0005] The present invention provides a semi-surrounding eccentric core tube and a construction method thereof.

[0006] The technical problem to be solved is as follows: Landscape-facing buildings have high visual requirements. Although the existing pure steel structure buildings have good visibility, their storey height is limited. The visibility of traditional frame structure buildings is extremely poor, and only a very small area in frame-core tube structure buildings has sufficient visibility.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: A semi-surrounding eccentric core tube for enhancing the stiffness of a building. The eccentric core tube is arranged at intervals on one side elevation of the building and is enclosed by a plurality of rigid columns arranged at intervals along the circumferential direction of the eccentric core tube. Adjacent two rigid columns are fixedly connected by connecting beams arranged at intervals in the vertical direction; inside each eccentric core tube, there is also a steel beam grid respectively fixedly connected to each rigid column in the corresponding eccentric core tube.

[0008] Furthermore, the building where the eccentric core tube is located is arranged near the landscape. The cross-section of the building is rectangular. One side elevation of the building close to the landscape is denoted as the landscape-facing side, and the side elevation facing away from the landscape is denoted as the background side; in the building where the eccentric core tube is located, two eccentric core tubes are arranged, and the two eccentric core tubes are respectively arranged at two vertical edge positions of the background side of the building.

[0009] Furthermore, in the building where the eccentric core tube is located, there is also an obliquely intersecting grid steel tube. The obliquely intersecting grid steel tube is sandwiched between the two eccentric core tubes and shares side walls with the two eccentric core tubes at the contact positions respectively; the cross-section of the obliquely intersecting grid steel tube is rectangular, one side elevation of the obliquely intersecting grid steel tube is flush with the background side of the building, and the other side elevation is flush with the landscape-facing side of the building; the floor slabs of the building are respectively fixedly connected to the eccentric core tube and the obliquely intersecting grid steel tube.

[0010] Furthermore, the cross-section of the eccentric core tube is rectangular. The rigid columns include concrete-filled steel tubes arranged at the four corners of the cross-section of the eccentric core tube, and shear wall columns arranged at the remaining positions. The connecting beams at the same horizontal plane in the same eccentric core tube 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.

[0011] Furthermore, 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 slab. The edge of the steel beam grid penetrates through the concrete of the shear wall column and is fixedly connected to the steel ring beam; the steel beam grids in the two eccentric core tubes extend outwards and are connected into one body; each of the two eccentric core tubes has a vertical edge overlapping with a vertical edge of the obliquely intersecting grid steel tube, and at each overlapping position, the eccentric core tube and the obliquely intersecting grid steel tube share a concrete-filled steel tube.

[0012] Furthermore, among the two side walls of the eccentric core tube perpendicular to the background side, the rigid columns are arranged at the vertical edge positions of the eccentric core tube.

[0013] Furthermore, among the side walls of the eccentric core tube that are flush with the outer periphery of the building, the coupling beams share the same steel beam with the beams in the building's outer frame.

[0014] Furthermore, an attached tower crane is provided on the outer side surface of the shear wall column on the landscape-facing side of the eccentric core tube. The tower body of the attached tower crane is connected to two concrete-filled steel tubes columns close to the attached tower crane through inclined braces extending obliquely downward, and the connection point between the tower body and the shear wall column is connected to the other two concrete-filled steel tubes columns far from the attached tower crane through inclined braces extending obliquely downward.

[0015] A construction method for a semi-surrounding eccentric core tube is used for constructing the above-mentioned semi-surrounding eccentric core tube. Embedded parts for connecting the steel beam grid and the obliquely intersecting grid steel tube are provided in the shear wall columns; at least one concrete-filled steel tube column for attaching the steel beam grid is also provided between the two eccentric core tubes;

[0016] The construction method is divided into the following sub-steps:

[0017] Step 1: Install the concrete-filled steel tube columns at the four corners of the eccentric core tube, and install the concrete-filled steel tube columns between the two eccentric core tubes for serving as the attachment points of the steel beam grid.

[0018] Step 2: Bind the steel reinforcement cages in the shear wall columns and weld the coupling beams to the concrete-filled steel tube columns. The coupling beams are arranged through the steel reinforcement cages of each shear wall column; the coupling beams of the two eccentric core tubes are fixedly connected to each other to form an overall structure in the shape of a Chinese character "mu".

[0019] Step 3: Weld the embedded parts to the coupling beams; the embedded parts are provided with interfaces for docking with the ends of the steel beam grids inside the eccentric core tube and the ends of the steel beam grids between the eccentric core tubes.

[0020] Step 4: Pour the concrete of the shear wall columns.

[0021] Step 5: Install the steel beam grid. The ends of the steel beam grids inside the eccentric core tube are fixedly connected to the coupling beams through the embedded parts, and the ends of the steel beam grids between the eccentric core tubes are fixedly connected to the coupling beams wrapped by concrete through the embedded parts and are fixedly connected to the coupling beams not wrapped by concrete and the concrete-filled steel tube columns by means of welding, bolting, or bolt-welding connection.

[0022] Furthermore, the construction progress of the eccentric core tube is 4 floors ahead of that of the obliquely intersecting grid steel tube, the construction progress of the obliquely intersecting grid steel tube is 4 - 6 floors ahead of that of the building's outer frame, and the construction progress of the building's outer frame is 3 - 4 floors ahead of that of the floor slab.

[0023] Compared with the prior art, the semi-surrounding eccentric core tube and its construction method of the present invention have the following beneficial effects:

[0024] In the present invention, by moving the core tube that was originally located at the center of the building to the side of the building away from the view, after the movement, the core tube no longer blocks the view inside the building (before the transformation, for views such as sea views, in a frame-core tube building, only one side has a relatively good view). At the same time, in order to overcome the influence of the movement of the core tube position on the vertical bearing capacity (after the core tube is moved, the floor slab span will increase significantly, and the existing steel beams cannot meet this span), by sandwiching an obliquely intersecting grid steel tube (with sufficient vertical bearing capacity and no blockage, but insufficient stiffness) between two eccentric core tubes and sharing the side wall with it, the obliquely intersecting grid steel tube is used to expand the stress positions for bearing the floor slab, avoiding the yielding of the floor beams at the bottom of the floor slab due to excessive span;

[0025] In the present invention, by changing the structure of the eccentric core tube from being completely surrounded by shear walls to being surrounded by columns one by one, sufficient view can be obtained inside the eccentric core tube; at the same time, by connecting the two core tubes and the common wall (the eccentric core tube and the obliquely intersecting grid steel tube share the wall at the contact position) through a steel beam grid, the three (two core tubes and one obliquely intersecting grid steel tube) are rigidly connected as a whole, thus overcoming the problem of insufficient stiffness of a single eccentric core tube or a single obliquely intersecting grid steel tube (here, due to the increase in the number of eccentric core tubes and semi-surrounding, the cross-section of a single core tube is even less than one-fourth of the cross-section of the core tube in a conventional building, but it is sufficient to suppress the torsion of the obliquely intersecting grid steel tube, and at the same time, the bearing capacities of the three for horizontal loads can be added). BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the top view of the eccentric core tube in the present invention;

[0027] Figure 2 is the top view of the eccentric core tube after being connected to the obliquely intersecting grid steel tube;

[0028] Figure 3 is the top view of the building adopting the eccentric core tube in the present invention;

[0029] Figure 4 is the front view of the building adopting the eccentric core tube in the present invention;

[0030] Figure 5 is the layout schematic diagram of concrete-filled steel tubular columns. For the convenience of reading the drawings, the outlines of the obliquely intersecting grid steel tube and the eccentric core tube are marked with a dashed box in the figure; Figure 2-3 The concrete-filled steel tubular columns in are not visible because they are blocked, and are listed separately here;

[0031] Figure 6 is the schematic diagram of the installation method of the attached tower crane;

[0032] Among them, 1 - concrete-filled steel tube column, 2 - shear wall column, 3 - coupling beam, 4 - steel beam grid, 5 - attached tower crane, 51 - diagonal brace, 6 - obliquely intersecting grid steel tube. Specific implementation manner

[0033] As Figure 1 shown, a semi-surrounding eccentric core tube is used to enhance the stiffness of a building. The eccentric core tubes are arranged at intervals on one side elevation of the building and are enclosed by a plurality of rigid columns arranged at intervals along the circumference of the eccentric core tube. Adjacent two rigid columns are fixedly connected by coupling beams 3 arranged at intervals in the vertical direction; a steel beam grid 4 fixedly connected to each rigid column in the corresponding eccentric core tube is further arranged in each eccentric core tube. Note that although the steel beam grid 4 exists on each floor, it is actually part of the floor beam. However, its distribution density is higher than that of the floor beams in the rest of the part because the cross-sectional area of the eccentric core tube is relatively small. If its distribution density is the same as that of the floor beams in the rest of the part, there will be very few grids inside.

[0034] As Figure 2-4 shown, the building where the eccentric core tube is located is set near a landscape. The cross-section of the building is rectangular. One side elevation of the building close to the landscape is denoted as the landscape-facing side, and the other side elevation facing away from the landscape is denoted as the background side; two eccentric core tubes are arranged in the building where the eccentric core tube is located, and the two eccentric core tubes are respectively arranged at two vertical edge positions of the background side of the building.

[0035] By setting the eccentric core tubes in this way, according to the optical principle, the area of the blocked view can be minimized to the greatest extent.

[0036] An obliquely intersecting grid steel tube 6 is further arranged in the building where the eccentric core tube is located. The obliquely intersecting grid steel tube 6 is sandwiched between the two eccentric core tubes and shares side walls with the two eccentric core tubes at the contact positions respectively; the cross-section of the obliquely intersecting grid steel tube 6 is rectangular. One side elevation of the obliquely intersecting grid steel tube 6 is flush with the background side of the building, and the other side elevation is flush with the landscape-facing side of the building; the floor slabs of the building are fixedly connected to the eccentric core tubes and the obliquely intersecting grid steel tube 6 respectively.

[0037] If the skew grid steel tube 6 is not set here, the span of the building cannot be too large, and the landscape-facing surface and the background surface need to be very close. In this embodiment, the cross-section of the skew grid steel tube 6 is rectangular, and the skew grid steel tube 6 is enclosed by four concrete-filled steel tubular columns 1 respectively arranged at the four vertical edges of the skew grid steel tube 6 and a skew grid arranged at the positions of the four side elevations. Each of the two eccentric core tubes has a vertical edge overlapping with a vertical edge of the skew grid steel tube 6, and at each overlapping position, the eccentric core tube and the skew grid steel tube 6 share a concrete-filled steel tubular column 1. In the skew grid steel tube 6, connectors are respectively arranged at the positions of the intersections of the members. The connector 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 the skew grid steel tube 6 is erected, the following method is used to control the position and attitude of the connector: A coordinate control network is established by using a total station. Three coordinate control points (three points determine a plane, that is, the docking plane) are set for each docking port of the connector. When the connector is hoisted, its position and attitude are adjusted so that the actual coordinates of each coordinate control point are consistent with its set coordinates. After the connector is installed, the total station is used to recheck the coordinate control points again. The connector here is equivalent to a structure formed by cutting a circle around the position of the member intersection point of the skew grid steel tube 6. According to the different intersection points, the connectors here are mainly divided into three shapes, namely the "Y" shape (that is, the starter) arranged at the bottom and connected to the reserved interface on the foundation, the "long" shape arranged at the four corners of the skew grid steel tube 6 (the vertical stroke of the "long" character is the concrete-filled steel tubular column 1 at the four corners of the skew grid steel tube 6), and the "rice" shape arranged at the remaining positions. During construction, the skew grid steel tube 6 is erected layer by layer in the order of one layer of members, one layer of connectors, then one layer of members, and then one layer of connectors... and fixedly connected to the eccentric core tube.

[0038] The cross-section of the eccentric core tube is rectangular, as Figure 5 shown. The rigid columns include concrete-filled steel tubular columns 1 arranged at the four corners of the cross-section of the eccentric core tube, and shear wall columns 2 arranged at the remaining positions. The continuous beams 3 on the same horizontal plane of the same eccentric core tube are connected together to form a steel ring beam. The four corners of the steel ring beam are welded to the concrete-filled steel tubular columns 1 and are wrapped by the concrete of each shear wall column 2.

[0039] The shear wall column 2 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 at most (on the background surface), and the width direction is arranged along the extension direction of the connecting beam 3, so it is called a column here. The rigid columns here can also all be steel tube concrete columns 1, but it is not easy to connect, because welding is more troublesome than burying in concrete. The shear wall column 2 is selected here to form the eccentric core tube. In addition to the advantage of easy connection mentioned above, there is another point that it can be cast in batches quickly with an integrated climbing formwork. Although the eccentric core tube here is not a core tube, it also has a steel beam grid 4 connected to the shear wall like a conventional shear wall core tube (the arrangement density is higher than the floor beams of the rest of the parts, and the grid inside is a plurality of square grids of different sizes). Since the shear wall column 2 around the eccentric core tube is actually a structure similar to a reinforced concrete column, such a slender reinforced concrete column is unstable. Here, the steel beam grid 4 is used to connect the shear wall columns 2 in the two eccentric core tubes together to enhance stability.

[0040] The steel beam grid 4 and the steel ring beam are in one-to-one correspondence with the floor slabs of each floor of the building and are flush with the corresponding floor slabs. The edge of the steel beam grid 4 penetrates the concrete of the shear wall column 2 and is fixedly connected to the steel ring beam; the steel beam grid 4 in the two eccentric core tubes extends outward and is connected as a whole; each of the two eccentric core tubes has a vertical edge that overlaps with a vertical edge of the oblique grid steel tube 6, and at each overlapping position, the eccentric core tube and the oblique grid steel tube 6 share a steel tube concrete column 1. Sharing the steel tube concrete column 1 makes the eccentric core tube and the oblique grid steel tube 6 more tightly connected.

[0041] In the two side walls of each eccentric core tube perpendicular to the background surface, rigid columns are set at the vertical edges of the eccentric core tube. In this way, wide doors are left on the two side walls, which can easily exchange construction materials with the outside world. At the same time, springboards can be laid on the high-density steel beams inside and between the two eccentric core tubes to form a temporary construction platform for carrying personnel and construction materials, and the above-mentioned door is located at the end of this platform.

[0042] In the side wall where the eccentric core tube is flush with the outer periphery of the building, the connecting beam 3 and the beam in the outer frame of the building share the same steel beam. In other words, the connecting beam 3 here is actually a steel beam in the outer frame of the building, and its cross section is larger than the connecting beam 3 in other places, so there is no need to set up an additional connecting beam 3.

[0043] like Figure 6 As shown, an attached tower crane 5 is arranged on the outer side surface of the shear wall column 2 facing the view surface of the eccentric core tube, and the tower body of the attached tower crane 5 is connected to two steel tube concrete columns 1 close to the attached tower crane 5 through a diagonal brace 51 extending obliquely downward, and the connection point between the tower body and the shear wall column 2 is connected to two steel tube concrete columns 1 away from the attached tower crane 5 through a diagonal brace 51 extending obliquely downward.

[0044] For an eccentric core tube, an attached tower crane 5 needs to be set on its side like a conventional shear wall core tube as a construction instrument. However, since it is not closed and cannot effectively bear the attached tower crane 5, concrete-filled steel tubes 1 are set at the four corners of the eccentric core tube and connected with diagonal braces 51.

[0045] A construction method for a semi-surrounding eccentric core tube is used for constructing the above-mentioned semi-surrounding eccentric core tube. Embedded parts for connecting a steel beam grid 4 and an obliquely intersecting grid steel tube 6 are arranged in a shear wall column 2; at least one concrete-filled steel tube 1 for attaching the steel beam grid 4 is also arranged between two eccentric core tubes;

[0046] The construction method is divided into the following sub-steps:

[0047] Step 1: As Figure 5 shown, install the concrete-filled steel tubes 1 at the four corners of the eccentric core tube, and install the concrete-filled steel tubes 1 between two eccentric core tubes for serving as attachment points of the steel beam grid 4;

[0048] Since the concrete-filled steel tubes 1 are also rigid columns and are installed relatively fast, whether it is the concrete-filled steel tubes 1 at the four corners of the obliquely intersecting grid steel tube 6 or the concrete-filled steel tubes 1 at the four corners of the eccentric core tube, they all need to be installed first, so as to provide an accurate installation site for the installation of other components.

[0049] Step 2: Bind the steel reinforcement cages in the shear wall columns 2 and weld the coupling beams 3 to the concrete-filled steel tubes 1. The coupling beams 3 are arranged through the steel reinforcement cages of each shear wall column 2; the coupling beams 3 of two eccentric core tubes are fixedly connected to form an overall structure in the shape of a Chinese character "mu". The coupling beams 3 being connected as a whole has a better stabilizing effect on the slender columns in the eccentric core tube, and itself can also be used as the obliquely intersecting grid steel tube 6, floor beams, and outer frames.

[0050] Step 3: Weld the embedded parts to the coupling beams 3; the embedded parts are provided with interfaces for butt-jointing with the ends of the steel beam grid 4 inside the eccentric core tube and the ends of the steel beam grid 4 between the eccentric core tubes; these interface positions are flush with the concrete outer surface, and they can be butt-jointedly connected with the ends of the steel beams to be installed later, and at the same time, they will not block the climbing form during concrete pouring. Of course, if the climbing form has the function of retracting the formwork, avoidance openings can also be left on the formwork of the climbing form for these embedded parts, so as to allow the embedded parts to protrude out of the concrete.

[0051] Step 4: Pour the concrete of the shear wall columns 2.

[0052] Step 5: Install the steel beam grid 4. The ends of the steel beam grid 4 inside the eccentric core tube are fixedly connected to the coupling beam 3 through embedded parts. The ends of the steel beam grid 4 between the eccentric core tubes are fixedly connected to the coupling beam 3 wrapped by concrete through embedded parts, and are fixedly connected to the coupling beam 3 not wrapped by concrete and the concrete-filled steel tube column 1 by welding, bolting, or bolt-welding connection methods.

[0053] In this embodiment, the climbing formwork is used to pour the concrete of the shear wall column 2. Therefore, Step 5 is carried out after Step 4 to avoid affecting the movement of the climbing formwork. If the climbing formwork is not used to pour the concrete, Steps 4 and 5 can be exchanged, thus eliminating the installation of the embedded parts.

[0054] The construction progress of the eccentric core tube leads that of the skewed grid steel tube by 64 floors, the construction progress of the skewed grid steel tube 6 leads that of the building outer frame by 4 - 6 floors, and the construction progress of the building outer frame leads that of the floor slab by 3 - 4 floors. Here, "floor" refers to the storey, that is, the height of each section in each area is an integer multiple of the storey height, and the leading construction area leads an integer multiple of the storey height.

[0055] The embodiments described above are only descriptions of 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. A semi-enclosed eccentric core tube is used to improve the rigidity of the building. Features: The eccentric core tube is arranged at intervals at a side elevation of the building and is surrounded by a plurality of rigid columns arranged at intervals along the circumference of the eccentric core tube, and two adjacent rigid columns are fixedly connected by connecting beams (3) arranged at intervals along the vertical direction; each eccentric core tube is also provided with a steel beam grid (4) which is respectively fixedly connected to each rigid column in the eccentric core tube; The building where the eccentric core tube is located is arranged near the landscape, the cross section of the building is rectangular, a side elevation of the building close to the landscape is recorded as the landscape facing surface, and a side elevation away from the landscape is recorded as the background surface; two eccentric core tubes are arranged in the building where the eccentric core tube is located, and the two eccentric core tubes are respectively arranged at two vertical edges of the background surface of the building; The building where the eccentric core tube is located is also provided with a diagonal grid steel tube (6), the diagonal grid steel tube (6) is sandwiched between the two eccentric core tubes and shares a side wall with the two eccentric core tubes at the contact position; the diagonal grid steel tube (6) has a rectangular cross section, one side elevation of the diagonal grid steel tube (6) is flush with the background surface of the building and the other side elevation is flush with the view surface of the building; the floor slab of the building is fixedly connected to the eccentric core tube and the diagonal grid steel tube (6) respectively; A diagonal grid steel cylinder is sandwiched between the two eccentric core cylinders, and the diagonal grid steel cylinder is used to expand the force-bearing position for bearing the floor slab; the two eccentric core cylinders and the common wall are connected by a steel beam grid (4), so that the two eccentric core cylinders and the diagonal grid steel cylinder (6) are rigidly connected as a whole, thereby overcoming the problem of insufficient rigidity of a single eccentric core cylinder or a single diagonal grid steel cylinder.

2. A semi-enclosed eccentric core tube according to claim 1, Features: The cross section of the eccentric core tube is rectangular, the rigid column comprises a steel tube concrete column (1) arranged at the four corners of the cross section of the eccentric core tube, and a shear wall column (2) arranged at the remaining positions, the connecting beams (3) of the same eccentric core tube on the same horizontal plane are connected together to form a steel ring beam, the four corners of the steel ring beam are welded to the steel tube concrete column (1), and are wrapped by the concrete of the shear wall columns (2).

3. A semi-enclosed eccentric core tube according to claim 2, Features: The steel beam grid (4) and the steel ring beam correspond to the floor slabs of each floor of the building one by one and are flush with the corresponding floor slabs. The edge of the steel beam grid (4) penetrates the concrete of the shear wall column (2) and is fixedly connected to the steel ring beam. The steel beam grids (4) in the two eccentric core tubes extend outward and are connected as a whole. The two eccentric core tubes each have a vertical edge that overlaps with a vertical edge of the oblique grid steel tube (6), and at each overlapping position, the eccentric core tube and the oblique grid steel tube (6) share a steel tube concrete column (1).

4. A semi-enclosed eccentric core tube according to claim 2, Features: The eccentric core tube is perpendicular to the two side walls of the background surface, and the rigid column is arranged at the vertical edge position of the eccentric core tube.

5. A semi-enclosed eccentric core tube according to claim 3, It is characterized in that: In the side wall of the eccentric core tube flush with the outer periphery of the building, the coupling beam (3) shares the same steel beam with the beam in the building outer frame.

6. A semi-surrounding eccentric core tube according to claim 2, It is characterized in that: An attached tower crane (5) is arranged on the outer side surface of the shear wall column (2) on the landscape-facing side of the eccentric core tube. The tower body of the attached tower crane (5) is connected to the two concrete-filled steel tubular columns (1) close to the attached tower crane (5) through inclined braces (51) extending obliquely downward, and the connection point of the tower body and the shear wall column (2) is connected to the two concrete-filled steel tubular columns (1) far from the attached tower crane (5) through inclined braces (51) extending obliquely downward.

7. A construction method of a semi-surrounding eccentric core tube, It is characterized in that: For constructing a semi-surrounding eccentric core tube as described in claim 3, embedded parts for connecting the steel beam grid (4) and the obliquely intersecting grid steel tube (6) are arranged in the shear wall column (2); at least one concrete-filled steel tubular column (1) for attaching the steel beam grid (4) is also arranged between the two eccentric core tubes; The construction method is divided into the following sub-steps: Step 1: Install the concrete-filled steel tubular columns (1) at the four corners of the eccentric core tube, and install the concrete-filled steel tubular columns (1) between the two eccentric core tubes for serving as the attachment points of the steel beam grid (4); Step 2: Bind the steel reinforcement cage in the shear wall column (2) and weld the coupling beam (3) to the concrete-filled steel tubular column (1). The coupling beam (3) is arranged through the steel reinforcement cages of each shear wall column (2); the coupling beams (3) of the two eccentric core tubes are fixedly connected to each other to form an overall structure in the shape of "eye"; Step 3: Weld the embedded parts to the coupling beam (3); the embedded parts are provided with interfaces for docking with the ends of the steel beam grid (4) inside the eccentric core tube and the ends of the steel beam grid (4) between the eccentric core tubes; Step 4: Pour the concrete of the shear wall column (2); Step 5: Install the steel beam grid (4). The ends of the steel beam grid (4) inside the eccentric core tube are fixedly connected to the coupling beam (3) through the embedded parts, and the ends of the steel beam grid (4) between the eccentric core tubes are fixedly connected to the coupling beam (3) wrapped by concrete through the embedded parts and are fixedly connected to the coupling beam (3) not wrapped by concrete and the concrete-filled steel tubular column (1) by means of welding, bolting, or bolt-welding connection.

8. A construction method of a semi-surrounding eccentric core tube according to claim 7, It is characterized in that: The construction progress of the eccentric core tube is 4 floors ahead of the obliquely intersecting grid steel tube (6), the construction progress of the obliquely intersecting grid steel tube (6) is 4 - 6 floors ahead of the building outer frame, and the construction progress of the building outer frame is 3 - 4 floors ahead of the floor slab.

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