Reticulated shell block construction method based on virtual rotating shaft

Abstract

The invention provides a reticulated shell block construction method based on a virtual rotating shaft. The reticulated shell block construction method comprises the steps that initial information of a to-be-constructed reticulated shell block is obtained; setting a virtual rotating shaft for the to-be-constructed reticulated shell block based on the initial information; a supporting jig frame is arranged on a floor based on the virtual rotating shaft, the to-be-constructed reticulated shell blocks are assembled on the supporting jig frame, and at the moment, the to-be-constructed reticulated shell blocks are in a horizontal lying posture state; lifting the to-be-constructed reticulated shell blocks based on the lifting points; wherein the to-be-constructed reticulated shell block rotates around the virtual rotating shaft in the lifting process, so that the to-be-constructed reticulated shell block reaches the designed inclined posture from the horizontal prone posture state. According to the reticulated shell block construction method based on the virtual rotating shaft, the problem that an existing large-span reticulated shell block construction method is large in construction difficulty or high in construction cost can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and more specifically, to a grid shell block construction method based on a virtual rotation axis. Background Art

[0002] The grid shell roof is referred to as the grid shell structure. The grid shell structure is a mesh shell structure, a lattice shell, or a curved grid structure. The grid shell structure has the advantages of both the flat grid structure and the thin shell structure, with simple construction and construction methods, beautiful shape, and reasonable force. The grid shell structure is composed of a large number of small units in triangles or other shapes, and is usually used in buildings that require beautiful appearance and large-span space coverage, such as stadium domes, large exhibition halls, theaters, etc.

[0003] In the field of large-span space structures, large-span and large-area space curved lattice shells are an important structural form and are widely used in large public buildings such as gymnasiums and exhibition halls. This type of lattice shell structure is usually supported by independent columns and assembled at high altitude by setting lifting brackets on the column heads or gantry lifting towers at the parts without supporting columns.

[0004] The traditional construction method of large-span and large-area space curved lattice shells often faces problems such as high support frame height, high stability requirements, and many safety hazards in high-altitude operations. Especially in the process of lifting the large arch high lattice shell blocks with an angle, due to the height difference between the lifting points, the lattice shell blocks need to be assembled in a lying position on the floor first, and then rotated and adjusted to the tilt state required by the design, and finally hoisted.

[0005] There are two traditional methods for adjusting the tilt state of the grid shell blocks. The first method is to directly set up a large supporting frame (such as Figure 1 As shown), the inclined gridshell blocks are assembled on the large supporting frame; however, this method not only requires a large amount of materials, but also has extremely high requirements on the supporting stability of the large supporting frame, which seriously increases the construction cost and risk.

[0006] The second method is to use the lowest point of the grid shell block as the rotation axis, and rotate and adjust the grid shell block during the process of lifting the grid shell block off the ground to achieve the desired tilt state. However, when using this method, at the moment when the grid shell block is separated from the supporting frame, the center of gravity position of the grid shell block changes, resulting in large horizontal movement and swing, which increases the difficulty of construction and may cause damage to the structure.

[0007] Based on this, there is an urgent need for a method that can both reduce the design height of the supporting frame and effectively prevent the horizontal swing of the grid shell blocks during the lifting process. Summary of the invention

[0008] In view of the above problems, an object of the present invention is to provide a grid shell block construction method based on a virtual rotation axis to solve the problem of high construction difficulty or high construction cost of the existing large-span grid shell block construction method.

[0009] The grid shell block construction method based on the virtual rotation axis provided by the present invention obtains the initial information of the grid shell block to be constructed;

[0010] Setting a virtual rotation axis for the grid shell block to be constructed based on the initial information;

[0011] Arranging a support frame on the floor based on the virtual rotation axis, and assembling the grid shell blocks to be constructed on the support frame, at which time the grid shell blocks to be constructed are in a flat lying state;

[0012] The grid shell blocks to be constructed are lifted based on each lifting point; wherein, the grid shell blocks to be constructed rotate around the virtual rotation axis during the lifting process to reach a designed inclined posture from a flat lying posture.

[0013] In addition, a preferred solution is that the initial information of the grid shell blocks to be constructed includes the center of gravity position; and

[0014] The virtual rotation axis is a straight line passing through the center of gravity.

[0015] In addition, a preferred solution is that, for the grid shell blocks to be constructed with uniform weight distribution, the center of gravity position is the centroid position of the grid shell blocks to be constructed;

[0016] For the grid shell segments to be constructed with uneven weight distribution, the center of gravity of the grid shell blocks to be constructed is found through the BIM model.

[0017] In addition, a preferred solution is that the grid shell block to be constructed is configured with at least two groups of hanging points, each group of hanging points includes a high hanging point and a low hanging point, and the initial information of the grid shell block to be constructed also includes the position of each hanging point; and,

[0018] If the weight of the grid shell blocks to be constructed is unevenly distributed, the virtual rotation axis is a vertical line passing through the center of gravity and perpendicular to the line connecting the high hanging point and the low hanging point in the same group.

[0019] In addition, the preferred solution is that for the grid shell blocks to be constructed with uniform weight distribution and a quadrilateral projection plane, if the two adjacent corners at high positions are high hanging points, and the remaining two corners are low hanging points, the adjacent high hanging points and low hanging points are grouped together; then,

[0020] The virtual rotation axis is a center line passing through the midpoints of the grouped high hanging points and the low hanging points.

[0021] In addition, a preferred solution is that in the process of arranging the support frame on the floor based on the virtual rotation axis,

[0022] Ensure that the projection position of the virtual rotation axis in the flat lying state coincides with the projection position of the virtual rotation axis in the designed tilted posture.

[0023] In addition, a preferred solution is that the arrangement of the support frame on the floor based on the virtual rotation axis includes:

[0024] Measuring the distances from the high hanging points and the low hanging points of the group to the center of gravity respectively;

[0025] Based on the distances from the group of high hanging points and the group of low hanging points to the center of gravity, respectively, calculating the offset distances of the group of high hanging points and the group of low hanging points in a horizontal lying state;

[0026] Based on the offset distances of the high hanging points and the low hanging points in the horizontal lying state, the inclination angles of the steel strands connecting the high hanging points and the low hanging points in the horizontal lying state are calculated respectively;

[0027] The supporting frame is arranged on the floor based on the inclination angle of the steel strands connecting the high hanging points and the low hanging points in a horizontal lying state and in coordination with the virtual rotation axis.

[0028] In addition, the preferred solution is that the formula for calculating the offset distance of the high hanging points and the low hanging points in the horizontal lying state is:

[0029] x=d(1-cosθ), y=(Sd)(1-cosθ); where,

[0030] x is the offset distance of the high hanging point, y is the offset distance of the low hanging point, d is the distance from the high hanging point to the center of gravity, S is the straight-line distance from the high hanging point to the low hanging point, Sd is the distance from the low hanging point to the center of gravity, and θ is the inclination angle of the grid shell block to be constructed in the designed inclined posture.

[0031] In addition, the preferred solution is that the formula for calculating the inclination angle of the steel strands connecting the high hanging points and the low hanging points in a group in a horizontal lying state is:

[0032] α = arctan(x / H1), β = arctan(y / H2); where

[0033] α is the inclination angle of the steel strand connecting the high hanging point, β is the inclination angle of the steel strand connecting the low hanging point, H1 is the distance from the lifting device connecting the high hanging point through the steel strand to the high hanging point, and H2 is the distance from the lifting device connecting the low hanging point through the steel strand to the low hanging point.

[0034] In addition, a preferred solution is that in the process of lifting the grid shell blocks to be constructed based on each lifting point;

[0035] The lifting force of the group of high and low hanging points satisfies the following formula:

[0036] F1sinα=F2sinβ, wherein F1 is the lifting force of the high hanging point, and F2 is the lifting force of the low hanging point.

[0037] Compared with the prior art, the above-mentioned grid shell block construction method based on the virtual rotation axis according to the present invention has the following beneficial effects:

[0038] The grid shell block construction method based on the virtual rotation axis provided by the present invention sets a virtual rotation axis for the large-span grid shell block, takes the virtual rotation axis as the assembly reference line, arranges the supporting frame on the floor and assembles the grid shell blocks to be constructed, and ensures that the projection position of the virtual rotation axis in a horizontal lying state coincides with the projection position of the virtual rotation axis in a designed inclined state, and controls the lifting force of each hanging point so that the grid shell block to be constructed can rotate around the virtual rotation axis during the lifting process. Since the center of gravity position of the entire grid shell block to be constructed is on the virtual rotation axis, the center of gravity position of the grid shell block to be constructed will not change suddenly during the rotation process, thereby reducing the horizontal swing of the grid shell block to be constructed when it is released, reducing the construction difficulty, and protecting the safety of the structure.

[0039] In order to achieve the above and related purposes, one or more aspects of the present invention include features that will be described in detail later and are particularly pointed out in the claims. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all of these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0041] Figure 1 Design the inclined posture assembly diagram for the traditional large-span grid shell block method;

[0042] Figure 2 A projection plan view of a lattice shell block in a designed tilted posture based on a virtual rotation axis provided in an embodiment of the present invention;

[0043] Figure 3A schematic diagram of a lattice shell block based on a virtual rotation axis provided in an embodiment of the present invention rotating from a designed tilted posture around a virtual rotation axis to a flat lying posture;

[0044] Figure 4 A schematic diagram of ground assembly of lattice shell blocks in a flat lying position based on a virtual rotation axis provided by an embodiment of the present invention;

[0045] Figure 5 A schematic diagram of a lattice shell block based on a virtual rotation axis provided in an embodiment of the present invention being separated from a supporting frame and in a self-balancing state;

[0046] Figure 6 A diagram showing the placement of lattice shell blocks in actual tilted posture based on a virtual rotation axis provided by an embodiment of the present invention;

[0047] Figure 7 A simplified diagram of parameters of a lattice shell block based on a virtual rotation axis when rotating around a virtual rotation axis provided in an embodiment of the present invention;

[0048] Figure 8 A schematic diagram of the diagonal positions of lattice shell blocks and the positions of virtual rotation axes based on virtual rotation axes provided in an embodiment of the present invention;

[0049] Fig. 9 A flow chart of a grid shell block construction method based on a virtual rotation axis provided by an embodiment of the present invention;

[0050] Figure symbols: grid shell block 1 in a designed inclined posture, grid shell block 1' in a flat lying posture, upper chord ball node 11, lower chord ball node 12, upper chord rod 13, lower chord rod 14, web rod 15, grid shell lifting and patching rod 16, grid shell support 17, center of gravity position 2 (point E), virtual rotation axis 3, diagonal line 4 (line connecting the highest hanging point and the lowest hanging point), supporting steel column 5, lifting bracket 61, steel strand guide frame 62, lifting device 71\71', steel strand 72\72', lifting bottom anchor 73\73', (highest) high hanging point A, high hanging point B, (lowest) low hanging point C, low hanging point, high hanging point (A / D) lifting force F1, lowest hanging point (B / C) lifting force F2, The weight of the grid shell blocks G, the inclination angle of the designed tilted posture θ, the height difference h between the highest hanging point and the lowest hanging point under the designed tilted posture, the distance H1 from the high hanging point (A / D) to the bottom of the corresponding lifting device, the distance H2 from the low hanging point (B / C) to the bottom of the corresponding lifting device, the projection distance L between the high hanging point (A / D) and the low hanging point (B / C) in groups, the distance S between the high hanging point (A / D) and the lowest hanging point (B / C) in groups, the distance d from the center of gravity to the high hanging point (A / D), the distance Sd from the center of gravity to the low hanging point (B / C), the angle α between the steel strand 72 of the high hanging point (A / D) and the vertical direction, and the angle β between the steel strand 72' of the low hanging point (B / C) and the vertical direction;

[0051] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0052] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Figure 2 The projection plane diagram of the lattice shell blocks in the designed tilted posture based on the virtual rotation axis provided by the embodiment of the present invention is shown. Figure 3 A schematic diagram showing a lattice shell block based on a virtual rotation axis provided by an embodiment of the present invention rotating from a designed tilted posture around a virtual rotation axis to a flat lying posture, Figure 4 The figure shows a schematic diagram of ground assembly of lattice shell blocks in a horizontal lying state based on a virtual rotation axis provided by an embodiment of the present invention. Figure 5 A schematic diagram showing a lattice shell block based on a virtual rotation axis provided by an embodiment of the present invention being separated from a supporting frame and in a self-balancing state, Figure 6 The figure shows the placement of the lattice shell blocks in the actual tilting posture based on the virtual rotation axis provided by the embodiment of the present invention. Figure 7 A simplified diagram of parameters of a lattice shell block based on a virtual rotation axis when rotating around the virtual rotation axis provided by an embodiment of the present invention is shown. Figure 8 A schematic diagram showing the diagonal positions of lattice shell blocks and the positions of virtual rotation axes based on virtual rotation axes provided by an embodiment of the present invention is shown. Fig. 9 A flow chart of a grid shell block construction method based on a virtual rotation axis provided in an embodiment of the present invention.

[0055] It should be noted that before introducing in detail the specific steps of the grid shell block construction method based on the virtual rotation axis provided by the present invention, it is necessary to first briefly introduce the structure of the large-span grid shell block and the lifting mechanism.

[0056] For the large-span lattice shell blocks, it includes multiple upper chord ball nodes 11 (for bolt balls) and multiple lower chord ball nodes 12 (for bolt balls), upper chord rods 13 are connected between adjacent upper chord ball nodes 11, lower chord rods 14 are connected between adjacent lower chord ball nodes 12, web rods 15 are connected between adjacent upper chord ball nodes 11 and lower chord ball nodes 12, and adjacent lattice shell blocks are connected by lattice shell lifting and patching rods 16. The upper chord ball nodes, lower chord ball nodes, upper chord rods, lower chord rods, lattice shell lifting and patching rods and web rods together constitute the large-span lattice shell blocks.

[0057] The lifting mechanism includes a lifting bracket 61 arranged above the grid shell support 17, a lifting device 71 is arranged on the lifting bracket 61, a steel strand 72 is connected to the lifting device 71, and a steel strand guide frame 62 is also arranged on the lifting bracket. After the steel strand passes around the steel strand guide frame 62, it is connected to the corresponding hanging point on the grid shell block to be constructed below through the lifting bottom anchor 73. In the subsequent lifting process, the grid shell block to be constructed is lifted to the grid shell support above the supporting steel column 5 by the lifting mechanism and fixed.

[0058] The construction method of the large-span lattice shell structure provided by the present invention is described in detail below. Fig. 9 The process of the grid shell block construction method based on the virtual rotation axis provided by the embodiment of the present invention is shown, combined with Figures 2 to 9 It can be seen that the block construction method of the grid shell based on the virtual rotation axis provided by the present invention mainly includes the following construction methods:

[0059] S110: Obtaining initial information of the grid shell blocks to be constructed;

[0060] S120: Setting a virtual rotation axis for the grid shell block to be constructed based on the initial information;

[0061] S130: arranging a support frame on the floor based on the virtual rotation axis, and assembling the grid shell blocks to be constructed on the support frame, at which time the grid shell blocks to be constructed are in a flat lying state;

[0062] S140: lifting the grid shell blocks to be constructed based on each lifting point; wherein the grid shell blocks to be constructed rotate around the virtual rotation axis during the lifting process to reach a designed inclined posture from a flat lying posture.

[0063] Specifically, the initial information of the grid shell block to be constructed includes the plane shape (shape projected to the horizontal plane), the plane size (size projected to the horizontal plane), the number of preset hanging points, the position of each hanging point, etc. of the grid shell block to be constructed; it should be noted that the hanging points are positions on the grid shell block to be constructed for connecting to the steel strands of the lifting device, half of which are even numbers, symmetrical on both sides, and two by two form a group. The hanging points in the same group include a high hanging point and a low hanging point, and all the hanging points include a highest hanging point (belonging to the high hanging point) and a lowest hanging point (belonging to the low hanging point).

[0064] In addition, the initial information of the grid shell block to be constructed also includes the center of gravity position E of the grid shell block to be constructed and the geometric relationship between the hanging points in the designed tilted posture, wherein the virtual rotation axis is a straight line passing through the center of gravity position; the geometric relationship between the hanging points in the designed tilted posture includes the height difference h between the highest hanging point and the lowest hanging point in the designed tilted posture, the projection distance L between the high hanging point and the low hanging point in the group, the distance S between the high hanging point and the lowest hanging point in the group, the line 4 (diagonal line) connecting the highest hanging point and the lowest hanging point, etc.

[0065] It should be noted that, in order to further illustrate the method of setting a virtual rotation axis for the grid shell block to be constructed based on the initial information, for the grid shell block to be constructed with uniform weight distribution, the center of gravity position is the centroid position of the grid shell block to be constructed, and the virtual rotation axis is a straight line passing through the center of gravity position. Generally, there are multiple straight lines that meet the conditions, and one of them is selected as the assembly reference line of the grid shell block to be constructed; for the grid shell segments to be constructed with uneven weight distribution, the center of gravity position of the grid shell block to be constructed is found through the BIM model, and the virtual rotation axis is a vertical line passing through the center of gravity position and perpendicular to the line connecting the high hanging point and the low hanging point in the same group, and serves as the assembly reference line of the grid shell block to be constructed.

[0066] Further, take the lattice shell blocks to be constructed with uniform weight distribution and regular quadrilateral projection plane as an example (such as Figures 2 to 8 As shown), the grid shell block has a total of four corners, and the two adjacent corners on the high side can be used as high hanging points (A\D), and the remaining two corners on the other side can be used as low hanging points (B\C), and the adjacent high hanging points and low hanging points are grouped together, for example, A and B are a group, and D and C are a group; at this time, the virtual rotation axis can be set to the center line passing through the midpoints of the grouped high hanging points and low hanging points (such as A and B) (the center line passes through the center of gravity of the grid shell block to be constructed).

[0067] It should be further explained that in order to ensure that the grid shell blocks to be constructed rotate around the virtual rotation axis during the process of lifting the grid shell blocks to be constructed based on each hanging point, it is necessary to ensure that the projection position of the virtual rotation axis in a flat lying state coincides with the projection position of the virtual rotation axis in a designed tilted state during the process of arranging the support frame on the floor based on the virtual rotation axis, so as to ensure that the center of gravity of the grid shell blocks to be constructed will not change suddenly during the rotation and lifting process, reduce the horizontal swing of the grid shell blocks to be constructed when they are released, reduce the construction difficulty, and protect the safety of the structure. In addition, the specific position of each hanging point in a flat lying state can be determined based on the virtual rotation axis, so as to facilitate the assembly of the entire grid shell to be constructed on the support frame on the floor, and it must be satisfied that the components near each hanging point do not interfere with the supporting steel columns when the grid shell blocks are assembled.

[0068] In a specific embodiment of the present invention, in order to arrange the support frame on the floor based on the virtual rotation axis, the process may further include:

[0069] Determine the distances from the group of high hanging points and low hanging points to the center of gravity according to the BIM model or actual measurement;

[0070] Based on the distances from the group of high hanging points and the group of low hanging points to the center of gravity, respectively, calculating the offset distances of the group of high hanging points and the group of low hanging points in a horizontal lying state;

[0071] Based on the offset distances of the high hanging points and the low hanging points in the horizontal lying state, the inclination angles of the steel strands connecting the high hanging points and the low hanging points in the horizontal lying state are calculated respectively;

[0072] The supporting frame is arranged on the floor based on the inclination angle of the steel strands connecting the high hanging points and the low hanging points in a horizontal lying state and in coordination with the virtual rotation axis.

[0073] The formula for calculating the offset distances of the high and low hanging points in a group in a horizontal lying position is:

[0074] x=d(1-cosθ), y=(Sd)(1-cosθ); where,

[0075] x is the offset distance of the high hanging point, y is the offset distance of the low hanging point, d is the distance from the high hanging point to the center of gravity, S is the straight-line distance from the high hanging point to the low hanging point, Sd is the distance from the low hanging point to the center of gravity, and θ is the inclination angle of the grid shell block to be constructed in the designed inclined posture.

[0076] The formula for calculating the inclination angle of the steel strands connecting the high hanging points and the low hanging points in a horizontal lying state is:

[0077] α = arctan(x / H1), β = arctan(y / H2); where

[0078] α is the inclination angle of the steel strand connecting the high hanging point, β is the inclination angle of the steel strand connecting the low hanging point, H1 is the distance from the lifting device connecting the high hanging point to the high hanging point through the steel strand, and H2 is the distance from the lifting device connecting the low hanging point to the low hanging point through the steel strand. It should be noted that the obtained steel strand inclination angles α and β must be within the maximum inclination capacity of the lifting system steel strand and must meet the design verification requirements.

[0079] It should be emphasized that in the process of lifting the grid shell blocks to be constructed based on each lifting point, it is necessary to control the lifting force of each lifting point according to the inclination angles α, β of each steel strand and the force balance condition obtained by the above calculation, so as to ensure that when the grid shell blocks are lifted and started to be released, the grid shell blocks tend to a self-balancing state, and the grid shell basically achieves zero swing or the minimum swing range.

[0080] The force balance condition can be represented by the following formula: F1sinα=F2sinβ, or F1sinα≈F2sinβ; where F1 is the lifting force of the high hanging point, and F2 is the lifting force of the low hanging point; the lifting forces of the high hanging points and the low hanging points in groups should satisfy the above formula to ensure that when the grid shell blocks are lifted and started to be removed, the grid shell blocks tend to be in a self-balanced state and there will be no sudden changes in the center of gravity. Of course, in the actual construction process, the horizontal swing during the lifting and removal process should also be monitored in real time, and horizontal constraints should be taken when necessary to ensure safety.

[0081] Finally, it should be noted that after the grid shell blocks to be constructed are assembled on the supporting frame, they are in a flat lying position. As the lifting device lifts the grid shell blocks to be constructed, the grid shell blocks to be constructed are separated from the supporting frame. In the process of separating from the supporting frame, the grid shell blocks to be constructed are in a self-balancing state. After the grid shell blocks to be constructed are separated from the supporting frame, they rotate around the virtual rotation axis based on the lifting force of the lifting device, and finally reach the designed inclined posture.

[0082] It can be seen from the above specific embodiments that the grid shell block construction method based on the virtual rotation axis provided by the present invention sets a virtual rotation axis for the large-span grid shell block, takes the virtual rotation axis as the assembly reference line, arranges the support frame on the floor and assembles the grid shell blocks to be constructed, and ensures that the projection position of the virtual rotation axis in a flat lying state coincides with the projection position of the virtual rotation axis in a designed tilted posture, and by controlling the lifting force of each hanging point, the grid shell block to be constructed can be rotated around the virtual rotation axis during the lifting process. Since the center of gravity position of the entire grid shell block to be constructed is on the virtual rotation axis, the center of gravity position of the grid shell block to be constructed will not change suddenly during the rotation process, reducing the horizontal swing of the grid shell block to be constructed when it is released; in addition, the grid shell block construction method based on the virtual rotation axis provided by the present invention can not only improve the safety and efficiency of construction, but also reduce the cost and complexity of the support frame. At the same time, the method is suitable for grid shell blocks of different shapes and numbers of hanging points, and has a wide range of applicability.

[0083] As above Figures 2 to 9 The grid shell block construction method based on the virtual rotation axis according to the present invention is described by way of example. However, those skilled in the art should understand that various improvements can be made to the grid shell block construction method based on the virtual rotation axis proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A block construction method for a lattice shell based on a virtual rotation axis, characterized in that: The construction method comprises: Obtain the initial information of the grid shell blocks to be constructed; Setting a virtual rotation axis for the grid shell block to be constructed based on the initial information; Arranging a support frame on the floor based on the virtual rotation axis, and assembling the grid shell blocks to be constructed on the support frame, at which time the grid shell blocks to be constructed are in a flat lying state; The grid shell blocks to be constructed are lifted based on each lifting point; wherein, the grid shell blocks to be constructed rotate around the virtual rotation axis during the lifting process to reach a designed inclined posture from a flat lying posture.

2. The method for constructing a grid shell by blocks based on a virtual rotation axis according to claim 1, characterized in that: The initial information of the grid shell blocks to be constructed includes the center of gravity position; and The virtual rotation axis is a straight line passing through the center of gravity.

3. The block construction method of lattice shell based on virtual rotation axis according to claim 2 is characterized in that: For the grid shell blocks to be constructed with uniform weight distribution, the center of gravity position is the centroid position of the grid shell blocks to be constructed; For the grid shell segments to be constructed with uneven weight distribution, the center of gravity of the grid shell blocks to be constructed is found through the BIM model.

4. The method for constructing a grid shell by blocks based on a virtual rotation axis according to claim 3, characterized in that: The grid shell block to be constructed is configured with at least two groups of hanging points, each group of hanging points includes a high hanging point and a low hanging point, and the initial information of the grid shell block to be constructed also includes the position of each hanging point; and If the weight of the grid shell blocks to be constructed is unevenly distributed, the virtual rotation axis is a vertical line passing through the center of gravity and perpendicular to the line connecting the high hanging point and the low hanging point in the same group.

5. The method for constructing a grid shell by blocks based on a virtual rotation axis according to claim 4, characterized in that: For the lattice shell blocks to be constructed with uniform weight distribution and a quadrilateral projection plane; if the two adjacent corners at high positions are high hanging points, and the remaining two corners are low hanging points, the adjacent high hanging points and low hanging points are grouped together; then, The virtual rotation axis is a center line passing through the midpoints of the grouped high hanging points and the low hanging points.

6. The method for constructing a grid shell by blocks based on a virtual rotation axis according to any one of claims 1 to 5, characterized in that: In the process of arranging the supporting frame on the floor based on the virtual rotation axis, Ensure that the projection position of the virtual rotation axis in the flat lying state coincides with the projection position of the virtual rotation axis in the designed tilted posture.

7. The method for constructing a grid shell by blocks based on a virtual rotation axis according to claim 6, characterized in that: The step of arranging a support frame on the floor based on the virtual rotation axis comprises: Measuring the distances from the high hanging points and the low hanging points of the group to the center of gravity respectively; Based on the distances from the group of high hanging points and the group of low hanging points to the center of gravity, respectively, calculating the offset distances of the group of high hanging points and the group of low hanging points in a horizontal lying state; Based on the offset distances of the high hanging points and the low hanging points in the horizontal lying state, the inclination angles of the steel strands connecting the high hanging points and the low hanging points in the horizontal lying state are calculated respectively; The supporting frame is arranged on the floor based on the inclination angle of the steel strands connecting the high hanging points and the low hanging points in a horizontal lying state and in coordination with the virtual rotation axis.

8. The method for constructing a grid shell by blocks based on a virtual rotation axis according to claim 7, characterized in that: The formula for calculating the offset distance of the high hanging points and the low hanging points of the group in the horizontal lying state is: x=d(1-cosθ), y=(Sd)(1-cosθ); where, x is the offset distance of the high hanging point, y is the offset distance of the low hanging point, d is the distance from the high hanging point to the center of gravity, S is the straight-line distance from the high hanging point to the low hanging point, Sd is the distance from the low hanging point to the center of gravity, and θ is the inclination angle of the grid shell block to be constructed in the designed inclined posture.

9. The method for constructing a grid shell by blocks based on a virtual rotation axis according to claim 8, characterized in that: The formula for calculating the inclination angle of the steel strands connecting the high and low hanging points in a horizontal position is: α = arctan(x / H1), β = arctan(y / H2); where α is the inclination angle of the steel strand connecting the high hanging point, β is the inclination angle of the steel strand connecting the low hanging point, H1 is the distance from the lifting device connecting the high hanging point through the steel strand to the high hanging point, and H2 is the distance from the lifting device connecting the low hanging point through the steel strand to the low hanging point.

10. The method for constructing a grid shell by blocks based on a virtual rotation axis according to claim 9, characterized in that: In the process of lifting the grid shell blocks to be constructed based on the various lifting points; The lifting force of the group of high and low hanging points satisfies the following formula: F1sinα=F2sinβ, wherein F1 is the lifting force of the high hanging point, and F2 is the lifting force of the low hanging point.

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