Keel curtain wall integrated plate system and construction method thereof

Abstract

The invention relates to the technical field of building outer wall heat preservation and decoration, in particular to a keel curtain wall integrated plate system and a construction method thereof. The keel can be fixedly connected with a wall body; the anchoring part is fixedly connected with the keel and provided with a transverse bearing plate. The decorative plate can be supported by the anchoring part, so that a light mortar cavity is formed between the decorative plate and the wall surface; the connecting piece is fixedly connected with the anchoring piece and used for limiting displacement of the decorative plate in the direction perpendicular to the wall face. According to the invention, carrier transformation is realized, an anchoring carrier is transformed from an unstable two-dimensional wall surface to a stable one-dimensional linear keel, and the anchoring firmness is improved. In addition, force flow reconstruction is achieved, plate-plate supporting and layer-by-layer supporting are achieved through the keels and the anchoring parts, the dead weight of the plates is transmitted to the keels layer by layer, and mortar displacement and bonding failure caused by accumulated transmission of the gravity of the plates on the upper layer to anchoring points on the lower layer are avoided. The dead weight of the plate is borne by the keel and uniformly transmitted to the wall body, and accumulated transmission of gravity is thoroughly blocked.

Description

Technical Field

[0001] This invention relates to the field of building exterior wall insulation and decoration technology, specifically to a keel curtain wall integrated panel system and its construction method. Background Technology

[0002] Currently, the integrated exterior wall insulation and decoration system mainly adopts the traditional "adhesion and anchoring" process, which involves pasting the insulation and decoration panels onto the wall with adhesive mortar and reinforcing them with anchors.

[0003] According to industry practice, current technology faces two fundamental challenges:

[0004] (a) "Unanchoring failure", that is, the anchoring system fails, specifically: Extremely low pass rate: The pass rate of traditional plastic expansion tube anchor bolt construction is low (case studies show only 20%). Anchors are suspended: they cannot effectively support the weight of the integrated panel; Accumulated gravity and compression: The weight of the upper layer of board will be transferred to the lower layer of anchors with a width of 40mm~50mm, which will exert continuous compression on the anchors, easily leading to mortar displacement and bonding failure.

[0005] (ii) "Cannot stick", that is, the adhesive system fails, specifically: Insufficient effective bonding area: Even if the amount of mortar is sufficient, the effective contact area is far lower than the standard requirements due to cavities, unevenness of the board, etc. The combination of concealment and risk: problems are difficult to detect in the short term. Under the "adhesive-anchored" design, the failure of a single system can be temporarily covered up, but the long-term risks are huge. Once the adhesive comes off, negative wind pressure will be formed, making it very easy to fall off. Moreover, the troubleshooting, detection and repair of the problem are extremely difficult. The increased weight of the integrated plate further exacerbates the anchoring burden. Summary of the Invention

[0006] To address the problems of low pass rate, suspended anchors, and failure caused by gravity accumulation in traditional anchoring systems, as well as the problems of insufficient effective bonding area and hidden and difficult-to-detect hidden dangers in adhesive bonding systems, the purpose of this invention is to provide an integrated keel curtain wall panel system and its construction method.

[0007] The technical solution provided by this invention is as follows: In the first aspect, a keel-based integrated panel system for curtain walls includes decorative panels; Also includes: The keel, which can be fixedly connected to the wall; Anchors are fixedly connected to the keel and are provided with horizontal support plates. The lower end of the decorative panel contacts the upper end of the horizontal support plate, and the decorative panel can be supported by the anchors, so that a lightweight mortar cavity is formed between the decorative panel and the wall. A connector, which is fixedly connected to an anchor, is used to limit the displacement of the decorative panel in the direction perpendicular to the wall.

[0008] This invention revolutionizes the anchoring medium, transforming the unstable two-dimensional wall surface into a stable one-dimensional linear keel, thus improving anchoring strength. Furthermore, it achieves force flow reconstruction by using a "keel + anchor" system to support each panel layer by layer, transferring the weight of the panels to the keel progressively. This prevents the cumulative weight of upper panels from being transferred to lower anchor points, thus avoiding mortar displacement and bonding failure. The panel's weight is borne by the keel and evenly distributed to the wall, completely preventing the cumulative transfer of gravity.

[0009] As an optional technical solution in the first aspect, the keel is provided with a mounting part, and the anchor is provided with a hook part; the anchor can be mounted on the keel. The anchor not only anchors to the keel, but also has a mounting mechanism, which can effectively prevent it from falling off.

[0010] Optionally, the keel is a continuous keel, and the keel has a contact surface facing the anchor; the anchor includes a first connecting plate; the first connecting plate is fitted with the contact surface and fixedly connected through at least two connection points. The connection scheme adopts a double anchor design, which can provide double the safety redundancy.

[0011] As an optional technical solution in the first aspect, the width of the horizontal support plate is 100mm~120mm.

[0012] As an optional technical solution in the first aspect, the connector includes a first insert plate and a second insert plate; the upper and lower ends of the decorative plate are respectively provided with slots for inserting the second insert plate and the first insert plate.

[0013] The second and first insert plates are inserted into the slots at the top and bottom of the decorative panel, respectively, to ensure that the decorative panel will not fall off accidentally after installation.

[0014] Optionally, it also includes an adjustment mechanism for adjusting the distance between the first insert plate, the second insert plate and the wall.

[0015] This adjustment mechanism allows for the adjustment of the flatness of the decorative panel, such as achieving a flatness adjustment range of 10mm to 20mm.

[0016] Furthermore, the upper end of the horizontal support plate is provided with a groove; the connector also includes a second connecting plate, which is installed in the groove through at least two connection points; the upper end surface of the second connecting plate is not higher than the horizontal support plate.

[0017] Installing the second connecting plate into the groove prevents it from protruding above the supporting surface, thus keeping the supporting surface flat and avoiding any impact on the flatness of the decorative panel assembly. The groove also acts as a limiter, preventing the connector from shifting and improving stability.

[0018] Secondly, a construction method for an integrated keel curtain wall panel system includes the following steps: S1. Anchor the keel to the wall, ensuring it is flat and secure; S2. Independently inspect the quality of the keel installation. If the inspection is successful, proceed to the next step. S3. Apply interface agent to the back of the decorative panel and hang the decorative panel on the keel using connectors and anchors. S4. Inspect the quality of the decorative panel installation to ensure there is no looseness; S5. Lightweight mortar is poured into the lightweight mortar cavity in layers from bottom to top; the pouring process creates lateral pressure on the keel anchoring system. If there are hidden defects, it will lead to "formwork bulging", thus achieving closed-loop secondary inspection.

[0019] S6. Inspect the pouring quality to ensure there are no cavities and that the concrete is fully bonded. 100% full bonding eliminates cavities and cuts off leakage channels.

[0020] This invention separates the processes, separating the responsibilities of "adhesion" and "anchoring," changing from "simultaneous adhesion and anchoring" to "anchoring first, then adhesion," making potential problems explicit during construction. By separating the processes, anchoring quality and adhesion quality are decoupled, making responsibility explicit. Through process separation and dual quality verification during the pouring process, it helps improve project quality. Ultimately, it achieves three major transformations: quality problems shift from "delayed emergence" to "process manifestation"; responsibility shifts from "difficult to trace" to "clearly segmented"; and safety is upgraded from "critical calculation" to "redundant reserves."

[0021] As an optional technical solution in the second aspect, in step S1, the distance between adjacent anchor points of the keel is no more than 600mm, and a level is used to ensure that the flatness error of the keel installation is no more than 2mm / 2m.

[0022] As an optional technical solution in the second aspect, a pouring port is reserved at the upper end of each decorative panel and an overflow port is reserved at the lower end; lightweight mortar is poured through the pouring port, and the slump of the lightweight mortar is not less than 180mm; after the lightweight mortar has initially set, the pouring port and the overflow port are sealed. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of a decorative panel installed on a wall in one embodiment of the present invention; Figure 2 This is a cross-sectional view of the connection between the anchor and the keel in one embodiment of the present invention; Figure 3This is a perspective view of the connection between the anchor and the keel in one embodiment of the present invention; Figure 4 This is a front view of the keel in one embodiment of the present invention; Figure 5 This is a side view of the keel in one embodiment of the present invention; Figure 6 This is a front view of the anchor and connector connected in one embodiment of the present invention; Figure 7 This is a side view of the anchor and connector in one embodiment of the present invention. Figure 8 This is a top view of the anchor and connector in one embodiment of the present invention. Figure 9 This is a perspective view of an anchor in one embodiment of the present invention; Figure 10 This is a perspective view of a decorative panel installed on a wall in one embodiment of the present invention; Figure 11 This is a top view of a decorative panel installed on a wall in one embodiment of the present invention.

[0024] Explanation of the labels in the diagram: 101. Wall surface; 102. Lightweight mortar cavity; 103. Decorative panel; 104. Waterproof strip; Third connecting plate 201, mounting part 202, contact surface 203, anchor bolt 204, anchor bolt anchoring hole 205; First connecting plate 301, hook part 302, horizontal support plate 304, second screw 303, groove 305, second strip hole 306; First insert plate 401, second insert plate 402, first screw 403, first strip hole 404, second connecting plate 405. Detailed Implementation

[0025] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0026] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0027] In one embodiment, the present invention proposes a keel curtain wall integrated panel system including a decorative panel 103, which can be an integrated heat-insulating and decorative panel, or an integrated panel composed of one or more materials with other functions.

[0028] The integrated keel curtain wall panel system proposed in this embodiment also includes keel, anchors, and connectors, such as... Figure 1 , Figure 2 , Figure 10 , Figure 11 As shown, the keel can be fixedly connected to the wall, for example, by anchoring it horizontally onto wall 101. It should be noted that, as... Figure 10 As shown, the keel is installed in layers, that is, each layer of decorative panel 103 corresponds to one layer of keel.

[0029] The anchor is fixedly connected to the keel. Specifically, the anchor is equipped with a horizontal support plate 304. During installation, the lower end of the decorative panel 103 contacts the upper end of the horizontal support plate 304, meaning the decorative panel 103 can be supported by the anchor. To prevent the decorative panel 103 from falling off, the connector is fixedly connected to the anchor, and the connector restricts the displacement of the decorative panel in the direction perpendicular to the wall 101.

[0030] After the decorative panel 103 is installed, a lightweight mortar cavity 102 is formed between the decorative panel 103 and the wall surface 101. Lightweight mortar can be poured into the formed cavity. It should be noted that... Figure 1 As shown, the keel is also located in the lightweight mortar cavity 102. Due to the separation of the keel, the lightweight mortar cavity 102 is also layered. During pouring, the lightweight mortar is poured layer by layer from bottom to top, which helps to eliminate cavities and achieve 100% full adhesion.

[0031] For the keel, as an optional embodiment, such as Figure 4 , Figure 5 As shown, the keel has a third connecting plate 201 with a cross-section similar to "d". Anchor bolt holes 205 are arranged at intervals on the third connecting plate 201, for example, at intervals of 300mm. The keel is fixedly installed on the wall 101 by anchor bolts 204 passing through the anchor bolt holes.

[0032] The keel can be made of high-strength and lightweight 5052 aluminum alloy profiles.

[0033] Alternatively, waterproof strips 104 may be installed in the gaps between the decorative panels 103.

[0034] To prevent anchors from falling off, as an optional embodiment, such as Figures 2-5As shown, the keel has a mounting part 202, and the anchor has a hook part 302. The anchor can be mounted on the keel. That is to say, the anchor is not only fixed to the keel by the connecting mechanism, but also has a mounting mechanism, which allows the anchor to be mounted on the keel, thereby effectively preventing it from falling off.

[0035] Optionally, the mounting part 202 forms a triangular structure, thereby further improving the structural strength of the profile.

[0036] Preferably, the included angle of the hook portion 202 can be 45 degrees, and when the hook portion 202 is attached to the mounting portion 202, it can form an effective anti-detachment structure.

[0037] Regarding the connection method between the anchor and the keel, alternatively, such as Figures 4-5 As shown, the keel is a continuous keel, and the keel has a contact surface 203 facing the anchor. The contact surface 203 is preferably a flat surface. When installing the keel, its flatness should also be checked. A flat keel helps to improve the stability of the anchor during installation.

[0038] The anchor includes a first connecting plate 301, which abuts against the contact surface 203 and also has a flat surface. The first connecting plate 301 and the contact surface 203 are fixedly connected by at least two connection points. The "dual anchor" design provides higher safety redundancy.

[0039] Specifically, the first connecting plate 301 is provided with at least two second strip holes 306, and the first connecting plate 301 is fixed to the contact surface 203 by second screws 303 passing through the second strip holes 306.

[0040] As an optional embodiment, the width of the horizontal support plate 304 is 100mm to 120mm. For example, a custom wide-face anchor with a width of 100mm can be selected, which can significantly increase the support area and improve the stability of the system.

[0041] For connectors, such as Figures 6-8 As shown, the connector includes a first insert plate 401 and a second insert plate 402. The upper and lower ends of the decorative panel are respectively provided with slots for inserting the second insert plate 402 and the first insert plate 401. When the decorative panel 103 is supported by the anchor, the slots at the upper and lower ends of the decorative panel are also respectively provided for inserting the second insert plate 402 and the first insert plate 401, which can effectively prevent the decorative panel 103 from falling off.

[0042] To improve the flatness of the decorative panel 103 after installation, such as Figure 8As shown, the integrated panel system of the keel curtain wall also includes an adjustment mechanism. This adjustment mechanism is used to adjust the distance between the first insert plate 401, the second insert plate 402 and the wall 101, thereby adjusting the distance between the decorative panel 103 and the wall 101, so that the flatness of the multiple decorative panels 103 can meet the requirements.

[0043] In one embodiment of the adjustment mechanism, the connector includes a second connecting plate 405 with at least two first strip-shaped holes 404. The length of each first strip-shaped hole 404 extends perpendicularly to the wall 101. The second connecting plate 405 is fixedly installed in a groove 305 by a first screw 403 passing through the first strip-shaped holes 404. Before tightening the first screw 403, the second connecting plate 405 can be moved to adjust the distance between the first insert plate 401, the second insert plate 402, and the wall 101. Once the distance meets the requirements, the first screw 403 is then tightened.

[0044] By setting the length of the first strip hole 404, the spacing can be adjusted within a range of 10mm to 20mm.

[0045] In one embodiment, such as Figure 9 As shown, the horizontal support plate 304 has a groove 305 at its upper end. The connector also includes a second connecting plate 405, which is installed in the groove 305 through at least two connection points. The "double anchor" design provides higher safety redundancy.

[0046] The upper surface of the second connecting plate 405 is not higher than the horizontal support plate 304.

[0047] Installing the second connecting plate into the groove prevents it from protruding above the supporting surface, thus keeping the supporting surface flat and avoiding any impact on the flatness of the decorative panel assembly. The groove also acts as a limiter, preventing the connector from shifting and improving stability.

[0048] In one embodiment, the present invention also proposes a construction method for a keel-curtain wall integrated panel system, comprising the following steps: S1. Anchor the keel to the wall to ensure it is flat and firm. Specifically, mark the keel installation position on the wall according to the design drawings, use M6 stainless steel anchors to fix the lightweight keel to the wall, the anchoring point spacing is no more than 600mm, and use a level to ensure that the flatness error of the keel installation is no more than 2mm / 2m. S2. Independently inspect the quality of the keel installation. If the inspection is successful, proceed to the next step. S3. Apply an interface agent to the back of the decorative panel 103, and then hang the decorative panel 103 onto the keel using connectors and anchors. Specifically, align the decorative panel 103 with the interface on the keel using the anchors, and hang the panels sequentially from bottom to top, ensuring proper installation. Tighten the second screw 303. Check the flatness of the panels and adjust the flatness using the adjustment mechanism until the error is no greater than 3mm.

[0049] S4. Inspect the quality of the decorative panel installation to ensure there is no looseness; S5. Lightweight mortar is poured into the lightweight mortar cavity 102 in layers from bottom to top; a pouring port is reserved at the upper end of each decorative panel 103 and an overflow port is reserved at the lower end; Lightweight mortar is poured through the pouring port, with a slump of not less than 180mm. The mortar is observed flowing out from the bottom overflow port to ensure that the cavity is completely filled. After the lightweight mortar has initially set, the pouring port and overflow port are sealed.

[0050] Closely observe the process during pouring. If "formwork bulging" or grout leakage occurs, stop pouring immediately and check the anchoring system.

[0051] S6. Check the pouring quality to ensure there are no cavities and full adhesion.

[0052] Anchoring system acceptance standards: After installation, the keel should not wobble noticeably when pushed by hand, and its flatness should meet the requirements. Hanging quality acceptance standards: The panels should be firmly hung without loosening, and their flatness should meet the requirements. Pouring quality acceptance standards: There should be no cavities or leaks, and no abnormal deformation should occur within 24 hours after pouring.

[0053] Interface agents can increase the adhesion between decorative panels and cast-in-place lightweight mortar. A suitable interface agent is the silane coupling agent KH550, which, through molecular bridging, reacts with the functional groups on the surface of polyurethane particles at one end and forms chemical bonds with cement hydration products at the other end.

[0054] This invention introduces the reliable thinking of building curtain walls into the integrated wall insulation and decoration panel system. Through process separation, structural optimization, carrier transformation and process innovation, it constructs a reliable, verifiable and durable integrated exterior wall insulation and decoration system.

[0055] In addition, in step S1, the distance between adjacent anchor points of the keel is no more than 600mm, and a level is used to ensure that the flatness error of the keel installation is no more than 2mm / 2m.

[0056] The lightweight mortar proposed in this invention can be formed by polyurethane particles, inorganic additives processed from solid waste, and specialized auxiliary agents. It possesses lightweight, high strength, energy-saving, and micro-expansion characteristics. Furthermore, the lightweight mortar has good fluidity, making it suitable for pouring and construction. It also exhibits good compatibility with insulation boards, ensuring long-term bonding reliability, and after curing, it forms a 100% fully bonded structure without cavities.

[0057] The layered lightweight mortar pouring method proposed in this invention creates a 100% cavity-free structure, which improves fire safety and wind resistance. The fire-resistant mechanism is achieved by blocking the chimney effect and eliminating the vertical spread path of flames. The wind-resistant advantage is demonstrated by eliminating the negative wind pressure adsorption effect and uniformly distributing dynamic loads. Traditional exterior wall insulation systems, especially those using organic insulation materials (such as polystyrene boards), have a fatal weakness in the cavity between the insulation layer and the wall. In the event of a fire, this cavity creates a strong "chimney effect," providing ample oxygen channels for the flames, causing the fire to spread vertically along the building facade in a short period of time, resulting in catastrophic consequences.

[0058] This system completely fills the space between the integrated insulation and decorative panel and the base wall by pouring lightweight mortar in layers, thus completely blocking the path of flame spread. This "cavity-free" design effectively solves the fire hazard of external wall insulation.

[0059] The lightweight mortar mix proportion is: 30%~40% cement-based, 15%~25% polyurethane, 20%~30% fly ash / slag, 5%~15% solid waste additives, and the balance is 0%~10% water or additives.

[0060] Traditional integrated panel bonding mortar has a high density, poor thermal insulation, and is prone to hollowing and cracking. Its production also requires the consumption of natural sand and gravel resources. In addition, traditional integrated panel bonding mortar is prone to shrinkage and cracking, resulting in a high maintenance rate.

[0061] The lightweight mortar proposed in this invention has a density significantly lower than that of traditional mortar (as low as 900 kg / m³). 3 It is about half the weight of ordinary mortar, reducing the structural load on buildings, and has a low thermal conductivity, providing additional insulation. Using solid waste materials such as fly ash aligns with the concept of a circular economy, reduces the consumption of natural resources, and has lower raw material costs, thus helping to reduce construction costs.

[0062] Furthermore, the micro-expansion properties of lightweight mortar reduce drying shrinkage, and when combined with polymer additives, it can improve bonding strength (the bonding strength of gypsum-based lightweight mortar reaches 0.7 MPa, higher than the 0.2-0.25 MPa of traditional cement mortar), effectively preventing hollow areas and cracking. In addition, the thickness of a single plastering layer can reach 25 mm, it has strong applicability to mechanized spraying, produces less waste plaster, and saves labor and materials.

[0063] The technical solution proposed in this invention has the following advantages: Process: Breaking away from the traditional "synchronous bonding and anchoring", the process achieves an irreversible process of "independent anchoring first, followed by full bonding and pouring". Carrier: The anchoring carrier is transformed from an unstable wall surface to a stable continuous keel, realizing "if the carrier is established, then the anchoring is established"; Structure: The sunken wide-face anchor and group anchor design provide multiple safety guarantees; Process: Cavity-free casting-type full bonding, achieving 100% effective bonding and forming a secondary verification; Efficiency: Compared with the traditional "adhesion and anchoring combination" process (adhesion and anchoring are carried out simultaneously), the construction method proposed in this invention has a simplified process and clear sectional acceptance, which can improve efficiency; Maintenance costs: Eliminate the risk of leakage and reduce subsequent maintenance costs; Quality assurance: Potential problems are made visible during construction, increasing the detection rate of quality issues; Safety performance: The system's safety factor is improved through multiple redundancy designs.

[0064] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A keel-based integrated panel system for curtain walls, comprising decorative panels (103); Its features are, Also includes: The keel, which can be fixedly connected to the wall; Anchors are fixedly connected to the keel and are provided with horizontal support plates (304); the lower end of the decorative panel (103) contacts the upper end of the horizontal support plate (304) and the decorative panel (103) can be supported by the anchors, so that a lightweight mortar cavity (102) is formed between the decorative panel (103) and the wall (101). A connector, which is fixedly connected to an anchor, is used to limit the displacement of the decorative panel in a direction perpendicular to the wall (101).

2. The integrated keel curtain wall panel system according to claim 1, characterized in that: The keel is provided with a mounting part (202), and the anchor is provided with a hook part (302). Anchors can be mounted on the keel.

3. The integrated keel curtain wall panel system according to claim 2, characterized in that: The keel is a continuous keel, and the keel has a contact surface (203) facing the anchor. The anchor includes a first connecting plate (301). The first connecting plate (301) is attached to the contact surface (203) and fixedly connected by at least two connection points.

4. The integrated keel curtain wall panel system according to claim 1, characterized in that: The width of the horizontal support plate (304) is 100mm~120mm.

5. The integrated keel curtain wall panel system according to claim 1, characterized in that: The connector includes a first insert plate (401) and a second insert plate (402). The decorative panel is provided with slots at its upper and lower ends for inserting the second insert plate (402) and the first insert plate (401).

6. The integrated panel system for keel curtain walls according to claim 5, characterized in that: It also includes an adjustment mechanism for adjusting the distance between the first insert plate (401), the second insert plate (402) and the wall (101).

7. The integrated keel curtain wall panel system according to claim 6, characterized in that: The upper end of the horizontal support plate (304) is provided with a groove (305); The connector further includes a second connecting plate (405), which is mounted in the groove (305) via at least two connection points; The upper surface of the second connecting plate (405) is not higher than the horizontal support plate (304).

8. A construction method for a keel-curtain wall integrated panel system as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Anchor the keel to the wall, ensuring it is flat and secure; S2. Independently inspect the quality of the keel installation. If the inspection is successful, proceed to the next step. S3. Apply interface agent to the back of the decorative panel (103) and hang the decorative panel (103) on the keel through connectors and anchors; S4. Inspect the quality of the decorative panel installation to ensure there is no looseness; S5. Lightweight mortar is poured into the lightweight mortar cavity (102) in layers from bottom to top; S6. Check the pouring quality to ensure there are no cavities and full adhesion.

9. The construction method according to claim 8, characterized in that: In step S1, the distance between adjacent anchor points of the keel shall not exceed 600mm, and a level shall be used to ensure that the flatness error of the keel installation is not higher than 2mm / 2m.

10. The construction method according to claim 8, characterized in that: A pouring port is reserved at the upper end of each decorative panel (103), and an overflow port is reserved at the lower end; Lightweight mortar is poured through the pouring port, and the slump of the lightweight mortar is not less than 180mm; After the lightweight mortar has initially set, seal the pouring port and overflow port.

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