Large-span chorded dome structure with screen shaking and installation method thereof

Abstract

The application discloses a large-span chorded dome structure with a shaking screen and a mounting method thereof, and belongs to the technical field of building structure design. The application comprises a chorded dome structure and a shaking screen structure. The shaking screen structure comprises a shaking screen base and a diagonal brace. The shaking screen structure is fixedly connected with a single-layer net shell of the chorded dome structure through the diagonal brace. The diagonal brace comprises at least one inner diagonal brace and at least one outer diagonal brace. The shaking screen base of the shaking screen structure is connected with a shaking screen body through an electric hoist. The technical scheme of the application realizes the organic combination of the chorded dome and the shaking screen body with a weight of 30t+ through the shaking screen structure, and the concentrated load of the shaking screen is evenly distributed to the dome, so that a large-span chorded dome structure with a shaking screen is formed, and the use requirement of people on the multi-functionality of the venue is met.

Description

Technical Field

[0001] This invention belongs to the field of architectural structure design technology, and in particular relates to a large-span cable-stayed dome structure with a shaking screen and its installation method. Background Technology

[0002] With the increasing demand for large-span, large-space structures, numerous novel large-span prestressed spatial structure systems have been creatively proposed. Among them, the cable-stayed dome structure, a prestressed structure supported on a perimeter compression ring beam, exhibits high structural efficiency. The cable-stayed dome structure system consists of an upper single-layer reticulated shell, lower vertical struts, radial tension members or cables, and circumferential cables. The upper ends of each ring strut are hinged to corresponding nodes of the single-layer reticulated shell, and the lower ends of the struts are connected to the next node of the single-layer reticulated shell via radial cables. The lower ends of the struts in the same ring are connected together by circumferential cables, forming a complete system with a clearly defined force transmission path. Under normal service loads, internal forces are transmitted through the upper single-layer reticulated shell to the lower struts, and then through the struts to the cables. The cables, under stress, generate a reverse thrust on the supports, significantly reducing the lateral thrust of the entire structure on the lower constraint ring beam. At the same time, due to the effect of the struts, the vertical displacement and deformation of each link of the upper single-layer reticulated shell are greatly reduced.

[0003] Existing multi-purpose stadiums, large-scale exhibition halls, and other large-span venues often use cable-stayed dome structures, which are beneficial for saving steel and increasing site space. Large-span multi-purpose stadiums with dithering screens mostly use truss structures to improve installation stability. However, truss structures use more steel than cable-stayed dome structures, increasing costs. To further reduce construction costs, it is urgent to solve the problem of how to stably install dithering screens under the cable-stayed dome structure.

[0004] A search revealed a rib-ring type multi-strut cable-stayed dome in Chinese patent publication number CN 111155696 A. This rib-ring type multi-strut cable-stayed dome comprises an upper single-layer reticulated shell and a lower cable-stayed system, wherein the lower cable-stayed system includes diagonal cables, ring cables, main struts, and secondary struts. This novel structure adds secondary struts radially between the single-layer reticulated shell and the diagonal cables, in addition to the main struts, to the interior of a traditional cable-stayed dome. There can be one or more secondary struts. Compared to traditional cable-stayed domes, the multi-strut cable-stayed dome combines the characteristics of both tensioned beams and cable-stayed domes. It increases the overall structural stiffness and span capacity of the cable-stayed dome without increasing the number of ring cables; it enhances the local stiffness of the radial cables, preventing slack; it reduces strut height and thus increases clearance without reducing structural efficiency; and it is simple and convenient to construct, making it suitable for roofs of ultra-large span buildings.

[0005] For example, Chinese patent publication CN 106968383 A discloses a combined cable dome and a cable dome, comprising a cable dome on the outside and a cable dome on the inside. The outermost ring of diagonal and ridge cables of the cable dome is connected to the innermost ring of circumferential rigid members of the cable dome. The overall planar projection of the cable dome is annular, with a single-layer mesh shell composed of rigid members on top and a cable-stayed system composed of diagonal cables, circumferential cables, and struts on the bottom. The overall planar projection of the cable dome is circular, composed of diagonal cables, circumferential cables, ridge cables, and struts. The combined dome proposed in this patent document fully utilizes the advantages of both cable domes and cable domes while avoiding their disadvantages.

[0006] Both of the aforementioned patent documents involve optimizing the design of existing cable-stayed dome structures to improve their overall strength and stability. However, neither the above solutions nor the existing technologies provide a method for constructing cable-stayed dome structures with shaking screens, making it difficult to meet people's needs for multifunctional use of venues. Summary of the Invention

[0007] 1. The problem to be solved

[0008] To meet people's demand for multifunctional use of venues, this invention provides a large-span cable-stayed dome structure with a dithered screen and its installation method. By optimizing the overall structure and installation method, the dithered screen structure and the cable-stayed dome structure are organically combined to form a new structural system while ensuring the overall structural stability, thereby meeting people's demand for multifunctional use of venues.

[0009] 2. Technical Solution

[0010] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0011] The present invention provides a large-span cable-stayed dome structure with a shaking screen, comprising a cable-stayed dome structure and a shaking screen structure. The shaking screen structure includes a shaking screen base and diagonal braces. The shaking screen structure is fixedly connected to the single-layer mesh shell of the cable-stayed dome structure through the diagonal braces. The diagonal braces include at least one inner diagonal brace and at least one outer diagonal brace. The shaking screen base of the shaking screen structure is connected to the shaking screen body through an electric winch.

[0012] Furthermore, the screen-shaking base matches the top frame structure of the screen-shaking body. The screen-shaking base includes a regular hexagonal structure formed by multiple side beams arranged in sequence. Each vertex is connected to the center of the screen-shaking base through a connecting beam. The connection points of the side beams and connecting beams form intersection nodes. The side beams, connecting beams and intersection nodes are rigidly connected.

[0013] Furthermore, the intersection node is provided with an inner cylinder and an outer cylinder. The length of the inner cylinder is greater than that of the outer cylinder. The top of the inner cylinder is connected to an electric winch. The hook of the electric winch passes through the inner cylinder and extends to the outside of the inner cylinder. The top of the outer cylinder is provided with a top cover plate, and the bottom of the outer cylinder is provided with a bottom cover plate. One end of the diagonal brace is fixedly installed on the top cover plate, and the other end is connected to the single-layer mesh shell.

[0014] Furthermore, the electric winch is fixedly connected to the top of the inner cylinder via a base plate, and

[0015] A stiffening plate is provided between the base plate and the top cover plate on the outer side of the inner cylinder, and a stiffening plate is also provided between the top cover plate and the bottom cover plate on the outer side of the outer cylinder.

[0016] Furthermore, the cable clamp includes a slanted cable lug plate, a strut lug plate, and a cable clamp body. The strut lug plate is set perpendicular to the top of the cable clamp body, and the slanted cable lug plate is set inclined to the side wall of the cable clamp body. The bottom of the cable clamp body is machined with an installation groove, a cableway, and a cable inlet. The ring cable is inserted into the cableway through the cable inlet. A cable clamp pressure plate is provided in the installation groove. The cable clamp pressure plate is detachably connected to the cable clamp body and is used to cooperate with the cableway to press the ring cable.

[0017] Furthermore, an 8-12mm gap is provided between the cable clamp pressure plate and the cable clamp body.

[0018] Furthermore, the cableway is machined into a groove eccentrically oriented towards the center of the dome, the groove being eccentrically arc-shaped, and the eccentricity value w being related to the diameter of the loop cable.

[0019] When the diameter of the loop cable d ≤ 100 mm, the eccentricity value w = d + 5, in mm;

[0020] When the diameter d of the loop cable is greater than 100 mm, the eccentricity w = d, in mm.

[0021] Furthermore, the cableway includes a cableway arc and a clamping arc. One end of the clamping arc is tangent to the cableway entrance, and the other end is tangent to the arc corresponding to the cableway arc. The radius of the cableway arc is R1 = w / 2, and the radius of the clamping arc is R2 = w.

[0022] Furthermore, the cable-stayed dome structure includes a single-layer mesh shell, inclined cables, and struts. The struts are vertically arranged, with their tops connected to the single-layer mesh shell and their bottoms connected to the strut lugs of the cable clamps. One end of the inclined cable is connected to the single-layer mesh shell, and the other end is connected to the inclined cable lugs of the cable clamps.

[0023] Multiple sliding supports are provided at equal intervals at the outer edge of the single-layer reticulated shell. Each sliding support has a horizontal sliding amount of ±50mm and a rotation angle of 0.02rad.

[0024] The present invention provides an installation method for a large-span cable-stayed dome structure with a shaking screen, comprising the following steps:

[0025] Step 1: Install the sliding support;

[0026] Step 2: Assemble the shaking screen structure and part of the single-layer mesh shell within the second ring cable area on the ground;

[0027] Step 3: Set up a support frame to support the shaking screen structure and part of the single-layer reticulated shell within the second ring cable area; set up a support frame to the required height at the lower part of the radial steel beams inside the second and fifth ring cables, and install guy ropes.

[0028] Step 4: Hoist the shaking screen structure and part of the single-layer mesh shell within the second ring cable area;

[0029] Step 5: Install the second ring cable to the radial beam between the outermost ring beams, install symmetrically, and then install the radial and circumferential structures from the inside out to finally form a complete single-layer reticulated shell;

[0030] Step 6: Install the stay cables, struts, and ring cables to form a complete cable system. Locate the installation position of the cable clamps on the ring cables. After verifying that the installation is qualified, install the cable clamps and tighten the ring cables.

[0031] Step 7: Pre-tension the cable system in batches, then tension it in batches according to 30%, 70%, and 105%, with an over-tension of 5%;

[0032] Step 8: Remove the temporary support frame;

[0033] Step 9: Assemble the shaking screen body on the ground, install the electric winch, and use the electric winch to lift the shaking screen body as a whole.

[0034] 3. Beneficial effects

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] (1) The present invention provides a large-span cable-stayed dome structure with a shaking screen, which includes a cable-stayed dome structure and a shaking screen structure suspended at the center of the cable-stayed dome structure. By setting the shaking screen structure and cooperating with an electric winch, the load of the shaking screen body of more than 30t can be applied to the shaking screen structure and the load can be evenly transferred to the top single-layer mesh shell. Under the premise of ensuring the overall structural stability, the shaking screen structure body and the cable-stayed dome structure are organically combined to form a new structural system, thereby meeting people's multi-functional use needs.

[0037] (2) The present invention provides a large-span cable-stayed dome structure with a shaking screen. The single-layer mesh shell is composed of box-shaped components. The bearings are in the same direction as the radial beams. The bearings have a 4° rotation space on the left and right sides in the direction perpendicular to the axis, i.e., in the direction of the ring cable, so as to overcome the damage to the bearings and shafts at the top of the struts due to the weight of the cable during the installation process, ensure that the structure is not easily damaged, and improve the strength and stability of the structure.

[0038] (3) The present invention provides a large-span cable-stayed dome structure with a shaking screen. Multiple sliding supports are installed at equal intervals on the outer edge of the outermost single-layer reticulated shell of the cable-stayed dome structure. Each sliding support has a horizontal sliding amount and a rotation angle value. Under the action of dynamic loads such as snow load, the entire cable-stayed dome structure can release a certain amount of internal stress through the radial sliding of the sliding supports. This allows the entire structure to have a certain amount of deformation with the load change, which is more conducive to the healthy operation of the entire structural system.

[0039] (4) The present invention provides a large-span cable-stayed dome structure with a shaking screen, which adopts a cable clamp with a bottom-bearing structure, and the cableway is processed into a groove that is eccentric to the center of the dome. The groove is eccentrically arc-shaped, and the eccentricity value w is adapted to the width of the cable inlet. Through the cable clamp setting of this structure, a clamping arc is formed. With the cable clamp pressure plate, it can clamp the ring cable on the one hand, and on the other hand, it can make the ring cable obtain vertical and horizontal clamping force, ensuring the health of the cable while clamping the ring cable.

[0040] (5) The installation method of the large-span cable-stayed dome structure with shaking screen of the present invention optimizes the design of the overall structure and construction method, realizes the organic combination of the shaking screen body and the cable-stayed dome structure, not only ensuring the strength and stability of the overall structure, but also providing the venue with multi-functional use needs, which is highly practical and more beautiful. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the large-span cable-stayed dome structure with a shaking screen according to the present invention.

[0042] Figure 2 for Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0043] Figure 3 This is a schematic diagram of the cable clamp structure of the cable-stayed dome structure of the present invention;

[0044] Figure 4 for Figure 3 Front view structural diagram;

[0045] Figure 5 This is a cross-sectional schematic diagram of the main structure of the cable clamp;

[0046] Figure 6This is a cross-sectional schematic diagram of the node structure of the screen shaking structure of the present invention;

[0047] Figure 7 This is a top view of the screen-shaking structure of the present invention;

[0048] Figure 8 This is a cross-sectional view of the screen shaking structure of the present invention;

[0049] Figure 9 This is a schematic diagram of the cable-stayed dome structure of the present invention being assembled on the ground.

[0050] Figure 10 This is a schematic diagram of the hoisting process of the cable-stayed dome structure of the present invention;

[0051] Figure 11 This is a schematic diagram of the cable-stayed dome structure after hoisting according to the present invention.

[0052] In the picture:

[0053] 1. Cable-stayed dome structure; 2. Sliding supports; 3. Cable-stayed bridge; 4. Struts;

[0054] 5. Cable clamp; 5-1. Inclined cable lug plate; 5-2. Support rod lug plate; 5-3. Cable clamp pressure plate; 5-4. Fastening bolts; 5-5. Cableway; 5-6. Cable inlet; 5-7. Cable clamp body; 5-8. Compression arc;

[0055] 6. Ring cable;

[0056] 7. Screen shaking structure; 7-1. Inner diagonal brace; 7-2. Outer diagonal brace; 7-3. Screen shaking base; 7-3-1. Side beam; 7-3-2. Connecting beam; 7-3-3. Intersection node;

[0057] 8. Electric winch; 9. Vibrating screen body; 10. Single-layer mesh shell; 11. Central cast steel node;

[0058] 12-1 Support frame one; 12-2 Support frame two; 12-3 Support frame three; 12-4 Support frame four; 12-5 Assemble the crossbeam; 12-6 Steel beam. Detailed Implementation

[0059] The present invention will be further described below with reference to specific embodiments.

[0060] Example 1

[0061] like Figure 1As shown, this embodiment of a large-span cable-stayed dome structure with a shaking screen includes a cable-stayed dome structure 1 and a shaking screen structure 7 suspended at the center of the cable-stayed dome structure 1. The cable-stayed dome structure 1 includes a single-layer mesh shell 10 located at its top, multiple sliding supports 2 evenly spaced and arranged in a ring at the outer edge of the single-layer mesh shell 10, and cable stays 3, struts 4, cable clamps 5, and ring cables 6 arranged in a ring at the bottom of the single-layer mesh shell 10, together forming a multi-loop cable system cable-stayed dome structure 1. The number of loops of the ring cables 6 is set according to actual construction needs, with the outermost loop being the first loop. In this embodiment, it is specifically set to 5 loops, and the cable stays 3, struts 4, and cable clamps 5 all correspond to the ring cables 6.

[0062] The support rod 4 is vertically arranged, with its top connected to the single-layer mesh shell 10 and its bottom connected to the support rod ear plate 5-2 of the cable clamp 5. One end of the inclined cable 3 is connected to the single-layer mesh shell 10, and the other end is connected to the inclined cable ear plate 5-1 of the cable clamp 5.

[0063] In a more optimized embodiment, a bearing is provided at the connection plate between the strut 4 and the top single-layer mesh shell 10. The single-layer mesh shell 10 is composed of box-shaped components. The bearing is in the same direction as the radial beam. The bearing has a 4° rotation space to the left and right in the direction perpendicular to the axis, i.e., in the direction of the ring cable 6, in order to overcome the damage to the top bearing and axis of the strut 4 caused by the weight of the ring cable 6 during installation, ensure that the structure is not easily damaged, and improve the strength and stability of the structure.

[0064] Specifically, such as Figure 6 and Figure 7 As shown, the screen-shaking structure 7 includes a screen-shaking base 7-3 and diagonal braces. The screen-shaking structure 7 is fixedly connected to the single-layer mesh shell 10 of the cable-stayed dome structure 1 via the diagonal braces. The diagonal braces include at least one inner diagonal brace 7-1 and at least one outer diagonal brace 7-2, and the actual number can be determined based on the actual construction design. The screen-shaking base 7-3 of the screen-shaking structure 7 is connected to the screen body 9 via an electric winch 8. The electric winch 8 enables the lifting and lowering adjustment of the screen body 9, facilitating electric adjustment of the lifting height and allowing for ground maintenance.

[0065] This invention, by setting up a shaking screen structure 7 and optimizing its structure, can transfer the load of the shaking screen main body 9 (over 30 tons) onto the shaking screen structure 7, and can evenly transfer the load to the top single-layer mesh shell 10. Through the shaking screen structure 7, the concentrated load is transformed into a uniformly distributed load acting on the cable-stayed dome structure 1. While ensuring the overall structural stability, the shaking screen main body and the cable-stayed dome structure 1 are organically combined to form a new structural system. This dome structure can be used as a separate load-bearing system, improving the flexibility of application scenarios, thereby meeting people's needs for multi-functional use of venues.

[0066] As a further optimization of this embodiment, such as Figure 6-8 The diagram illustrates the specific structural design of the screen shaking structure 7 of the present invention. The screen shaking base 7-3 of the screen shaking structure 7 matches the top frame structure of the screen shaking body 9, and the dimensions match. The screen shaking base 7-3 includes a regular hexagonal structure formed by multiple side beams 7-3-1 arranged in sequence. Each vertex is connected to the center of the screen shaking base 7-3 through a connecting beam 7-3-2. The junction of the side beams 7-3-1 and the connecting beams 7-3-2 forms an intersection node 7-3-3. The side beams 7-3-1, the connecting beams 7-3-2 and the intersection node 7-3-3 are rigidly connected.

[0067] like Figure 8 As shown, an inner cylinder ① and an outer cylinder ② are provided at the intersection node 7-3-3. The length of the inner cylinder ① is greater than that of the outer cylinder ②. The top of the inner cylinder ① is connected to the electric winch 8. The hook of the electric winch 8 passes through the inner cylinder ① and extends to the outside of the inner cylinder ①. The top of the outer cylinder ② is provided with a top cover plate ⑤, and the bottom of the outer cylinder ② is provided with a bottom cover plate ④. One end of the diagonal brace (i.e., the inner diagonal brace 7-1 or the outer diagonal brace 7-2) is fixedly installed on the top cover plate ⑤, and the other end is connected to the single-layer mesh shell 10.

[0068] The electric winches 8 are fixed to the upper part of the junction node 7-3-3, totaling 6, and are respectively fixedly connected to the top of the inner cylinder ① via base plates. The chains of the electric winches 8 pass through the inner cylinder ① of the junction node 7-3-3 to the lower shaking screen body 9, transferring the load of the shaking screen body 9 to the junction node 7-3-3 via the electric winches 8, and then transferring the load to the top single-layer mesh shell 10 through the diagonal bracing of the shaking screen structure 7. Specifically, as shown... Figure 7 As shown, in this embodiment, each intersection node 7-3-3 is provided with 2 inner diagonal braces 7-1 and 2 outer diagonal braces 7-2, which can effectively transfer the load to the single-layer grid shell 10 of the dome, and realize the conversion of the concentrated load into a uniformly distributed load on the cable-stayed dome structure 1 through the screen structure 7, thereby improving the stability of the structure and realizing the installation of the screen and the cable-stayed dome.

[0069] To further improve the connection strength and stability, a stiffening plate ⑥ is provided between the base plate and the top cover plate ⑤ on the outside of the inner cylinder ①, and a stiffening plate ③ is also provided between the top cover plate ⑤ and the bottom cover plate ④ on the outside of the outer cylinder ②.

[0070] As a further improvement to this embodiment, such as Figure 1 and Figure 2As shown, the sliding support 2 of the present invention has a horizontal sliding amount of ±50mm and a rotation angle of 0.02rad. By designing the structure of the sliding support 2, the entire cable-stayed dome structure 1 can release a certain amount of internal stress under dynamic loads such as snow loads through the radial sliding of the sliding support 2, so that the entire structure can have a certain amount of deformation with the load change, which is more conducive to the healthy operation of the entire structural system.

[0071] Example 2

[0072] like Figure 3 and Figure 4 As shown, the main structure of this embodiment of a large-span cable-stayed dome structure with a shaking screen is basically the same as that of embodiment 1. The main difference between this embodiment and embodiment 1 is that the cable clamp 5 is designed as a bottom-bearing structure, that is, the ring cable 6 is fixed from the bottom of the cable clamp 5, one end of the inclined cable 3 is fixedly connected to the cable clamp 5, and the other end is connected to the single-layer mesh shell 10.

[0073] The cable clamp 5 includes a diagonal cable lug 5-1, a strut lug 5-2, and a cable clamp body 5-7. One strut lug 5-2 is provided, perpendicular to the top of the cable clamp body 5-7. Two diagonal cable lugs 5-1 are provided, inclined to the side wall of the cable clamp body 5-7. The bottom of the cable clamp body 5-7 is machined with an installation groove, a cableway 5-5, and a cable inlet 5-6. The ring cable 6 is inserted into the cableway 5-5 through the cable inlet 5-6. The cableway 5-5 of the cable clamp 5 is arc-shaped, with the same diameter as the circle at the location of the ring cable 6. A cable clamp pressure plate 5-3 is provided in the installation groove. The cable clamp pressure plate 5-3 is detachably connected to the cable clamp body 5-7 and is used to cooperate with the cableway 5-5 to press the ring cable 6. Specifically, in this embodiment, two threaded holes are symmetrically machined on the cable clamp pressure plate 5-3. The cable clamp pressure plate 5-3 is placed at the bottom of the ring cable 6. The cable clamp pressure plate 5-3 is installed on the cable clamp body 5-7 by using fastening bolts 5-4 to complete the pressing and fastening of the ring cable 6.

[0074] Example 3

[0075] like Figure 5 As shown, the main structure of the large-span cable-stayed dome structure with shaking screen in this embodiment is basically the same as that in embodiment 2. The main difference between the two embodiments is that the cableway 5-5 is processed into a groove that is eccentric to the center of the dome on one side. The groove is eccentrically arc-shaped, and the eccentricity value w is adapted to the width W of the cableway inlet 5-6.

[0076] Specifically, in this embodiment, the eccentricity value w of the groove and the diameter d of the ring cable 6 have the following relationship:

[0077] When the diameter d of the ring cable 6 is less than or equal to 100 mm, the eccentricity value w = d + 5, in mm;

[0078] When the diameter d of the ring cable 6 is greater than 100 mm, the eccentricity w = d, in mm.

[0079] The arc-shaped segment of cableway 5-5 consists of a cableway arc and a pressing arc 5-8. At the connection point between one end of the cableway arc and the pressing arc 5-8, a vertically downward straight line is drawn, which passes through the center of the cableway arc. The other end of the cableway arc is connected to the vertical sidewall of the cableway entrance 5-6. The central angle of the cableway arc is 90° + α, where α = 60°. The connection point between the other end of the cableway arc and the vertical sidewall of the cableway entrance 5-6 is the center of the pressing arc 5-8.

[0080] The radius of the cableway arc is R1 = W / 2, and the radius of the clamping arc 5-8 is R2 = W. One end of the clamping arc 5-8 is tangent to the cable inlet 5-6, and the other end is tangent to the corresponding arc of the cableway arc, thus clamping the ring cable 6. Simultaneously, there is an 8-12mm gap between the cable clamping plate 5-3 and the cable clamp body 5-7. When the fastening bolt 5-4 clamps the cable clamping plate 5-3, the ring cable 6 is less likely to detach from the cableway 5-5, facilitating quick installation.

[0081] In addition, when the cable clamping plate 5-3 is clamped by the fastening bolt 5-4, the cable clamping plate 5-3 and the clamping arc 5-8 work together to clamp the ring cable 6, so that the ring cable 6 obtains vertical and horizontal clamping force, ensuring the health of the cable while clamping the ring cable 6.

[0082] Based on the present invention, a large-span cable-stayed dome structure with a shaking screen is provided, such as... Figure 9-11 As shown, this embodiment provides an installation method for this large-span cable-stayed dome structure with a dithered screen, specifically including the following steps:

[0083] Step 1: Install sliding supports 2 at equal intervals along the outer edge of the outermost single-layer reticulated shell 10, such as... Figure 9 As shown;

[0084] Step 2: Assemble the shaking screen structure 7 and part of the single-layer reticulated shell 10 in the second ring cable area on the ground. During assembly, a support frame 12-1 is set under the central cast steel node 11. The lower support of each radial beam is supported by the second ring support frame 3 12-3. At the same time, an assembly beam 12-5 is set (the beam 12-5 also serves as the transverse connecting steel beam of the second ring support frame 3 12-3, which has the function of stabilizing the entire frame system). The support frame 12-1 passes through the central intersection point of the shaking screen base 7-3 and is supported at the bottom of the central cast steel node 11 of the reticulated shell. It is a fixed-size detachable lattice frame. A support frame 2 12-2 is set under the intersection node 7-3-3 of the shaking screen base 7-3. After assembly and welding, the whole structure is hoisted.

[0085] Step 3: Set up and install support frame 3 12-3 and support frame 4 12-4. The support frame 3 12-3 and support frame 4 12-4 are standard modular lattice frames, which are respectively set at the lower part of the radial steel beams inside the second ring cable and the fifth ring cable. Install the support frame 3 12-3 and support frame 4 12-4 to the required height to support the shaking screen structure 7 and part of the single-layer mesh shell 10 in the area of ​​the second ring cable, and set the guy ropes.

[0086] Step 4, as follows Figure 10 As shown, the hoisting shaking screen structure 7 and the single-layer mesh shell assembly part inside the second ring cable are assembled as a whole. Before hoisting, the support frame 12-1 is removed. After hoisting and positioning, the coordinates of the center cast steel node 11 and the center point of the radial beam end are re-measured and adjusted.

[0087] Step 5: Select a suitable height at the bottom of the shaking screen structure 7, and connect the support frame 12-3 circumferentially and radially with steel beams 12-6 to increase the stability of the frame. Install the second ring cable to the radial beam between the outermost ring beams, install symmetrically, and then install the radial and circumferential structures from the inside to the outside to finally form a complete single-layer reticulated shell 10.

[0088] Step Six: Install the stay cables 3, struts 4, and ring cables 6 to form a complete cable system. Position the cable clamps 5 on the ring cables 6, and after verification, install the cable clamps 5 and tighten the fastening bolts 5-4. The tightening force must meet the specified value. Complete the tightening of the ring cables 6. (Specific details are as follows...) Figure 11 As shown;

[0089] Step 7: Pre-tension the cable system in batches, then tension it in batches according to 30%, 70%, and 105%, with an over-tension of 5%;

[0090] Step 8: Remove support frame 3 (12-3) and support frame 4 (12-4);

[0091] Step 9: Assemble the shaking screen body 9 on the ground, install the electric winch 8, and use the electric winch 8 to lift the shaking screen body 9 as a whole.

[0092] By optimizing the installation method described above, not only can the formwork be quickly installed, but construction safety can also be effectively improved, and the safety risks of project construction can be reduced.

[0093] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-span cable-stayed dome structure with a shaking screen, characterized in that: It includes a cable-stayed dome structure (1) and a screen-shaking structure (7). The screen-shaking structure (7) includes a screen-shaking base (7-3) and diagonal braces. The screen-shaking structure (7) is fixedly connected to the single-layer mesh shell (10) of the cable-stayed dome structure (1) through diagonal braces. The diagonal braces include at least one inner diagonal brace (7-1) and at least one outer diagonal brace (7-2). The screen-shaking base (7-3) of the screen-shaking structure (7) is connected to the screen-shaking body (9) through an electric winch (8). The cable-stayed dome structure (1) includes a single-layer mesh shell (10), a diagonal cable (3) and a strut (4). The strut (4) is set vertically, with its top connected to the single-layer mesh shell (10) and its bottom connected to the strut ear plate (5-2) of the cable clamp (5). One end of the diagonal cable (3) is connected to the single-layer mesh shell (10), and the other end is connected to the diagonal cable ear plate (5-1) of the cable clamp (5). The single-layer mesh shell (10) is provided with multiple sliding supports (2) at equal intervals at its outer edge. Each sliding support (2) has a horizontal sliding amount of ±50mm and a rotation angle of 0.02rad. The screen-shaking base (7-3) matches the frame top structure of the screen-shaking body (9). The screen-shaking base (7-3) includes a regular hexagonal structure formed by multiple side beams (7-3-1) arranged in sequence. Each vertex is connected to the center of the screen-shaking base (7-3) through a connecting beam (7-3-2). The intersection node (7-3-3) is formed at the connection between the side beams (7-3-1) and the connecting beams (7-3-2). The side beams (7-3-1), the connecting beams (7-3-2), and the intersection node (7-3-3) are rigidly connected. An inner cylinder and an outer cylinder are provided at the intersection node (7-3-3). The length of the inner cylinder is greater than that of the outer cylinder. The top of the inner cylinder is connected to an electric winch (8). The hook of the electric winch (8) passes through the inner cylinder and extends to the outside of the inner cylinder. The top of the outer cylinder is provided with a top cover plate, and the bottom of the outer cylinder is provided with a bottom cover plate. One end of the diagonal brace is fixedly installed on the top cover plate, and the other end is connected to the single-layer mesh shell (10). The cable clamp (5) includes a slanted cable ear plate (5-1), a strut ear plate (5-2), and a cable clamp body (5-7). The strut ear plate (5-2) is set perpendicular to the top of the cable clamp body (5-7), and the slanted cable ear plate (5-1) is set inclined to the side wall of the cable clamp body (5-7). The bottom of the cable clamp body (5-7) is machined with an installation groove, a cableway (5-5), and a cable inlet (5-6). The ring cable (6) is inserted into the cableway (5-5) through the cable inlet (5-6). A cable clamp pressure plate (5-3) is provided in the installation groove. The cable clamp pressure plate (5-3) is detachably connected to the cable clamp body (5-7) and is used to cooperate with the cableway (5-5) to press the ring cable (6).

2. The large-span cable-stayed dome structure with a shaking screen according to claim 1, characterized in that: The electric winch (8) is fixedly connected to the top of the inner cylinder via a base plate, and A stiffening plate is provided between the base plate and the top cover plate on the outer side of the inner cylinder, and a stiffening plate is also provided between the top cover plate and the bottom cover plate on the outer side of the outer cylinder.

3. The large-span cable-stayed dome structure with a shaking screen according to claim 1, characterized in that: There is a gap of 8-12mm between the cable clamp pressure plate (5-3) and the cable clamp body (5-7).

4. A large-span cable-stayed dome structure with a shaking screen as described in claim 1, characterized in that: The cableway (5-5) is machined into a groove that is eccentrically oriented towards the center of the dome. The groove is eccentrically arc-shaped, and the eccentricity value w is related to the diameter of the loop cable (6). When the diameter d of the ring cable (6) is less than or equal to 100 mm, the eccentricity value w is equal to d + 5, in mm. When the diameter d of the ring cable (6) is greater than 100 mm, the eccentricity w = d, in mm.

5. A large-span cable-stayed dome structure with a shaking screen according to any one of claims 1-4, characterized in that: The cableway (5-5) includes a cableway arc and a pressing arc (5-8). One end of the pressing arc (5-8) is tangent to the cableway entrance (5-6), and the other end is tangent to the arc corresponding to the cableway arc. The radius of the cableway arc is R1=w / 2, and the radius of the pressing arc (5-8) is R2=w.

6. The installation method of a large-span cable-stayed dome structure with a shaking screen according to any one of claims 1-5, characterized in that: The steps include the following: Step 1: Install the sliding support (2); Step 2: Assemble the shaking screen structure (7) and part of the single-layer mesh shell (10) within the second ring cable area on the ground. Step 3: Set up a support frame to support the shaking screen structure (7) and part of the single-layer mesh shell (10) in the second ring cable area. Set up a support frame to the required height at the lower part of the radial steel beam in the second and fifth ring cables, and set up guy ropes. Step 4: Hoist the shaking screen structure (7) and part of the single-layer mesh shell (10) within the second ring cable area; Step 5: Install the second ring cable to the radial beam between the outermost ring beam, install symmetrically, and then install the radial and circumferential structures from the inside to the outside to finally form a complete single-layer reticulated shell (10). Step 6: Install the stay cable (3), strut (4) and ring cable (6) to form a complete cable system. Position the cable clamp (5) on the ring cable (6), and after the inspection is qualified, install the cable clamp (5) and tighten the ring cable (6). Step 7: Pre-tension the cable system in batches, then tension it in batches at 30%, 70%, and 105%, with an over-tension of 5%; Step 8: Remove the temporary support frame; Step 9: Assemble the shaking screen body (9) on the ground, install the electric winch (8), and use the electric winch (8) to lift the shaking screen body (9) as a whole.

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