Thickness-adjustable and self-repairing sandwich wall and construction method thereof

Abstract

The invention relates to a thickness-adjustable and self-repairable sandwich wall and a construction method thereof, and belongs to the technical field of building structures, the structure comprises an inner acanthus, a thermal insulation layer, an outer acanthus and a plurality of energy consumption connecting devices, the thermal insulation layer is arranged between the inner acanthus and the outer acanthus, the thermal insulation layer is filled with epoxy resin microspheres, and the outer acanthus is filled with epoxy resin microspheres; the epoxy resin microspheres are broken under pressure and used for curing and repairing the thermal insulation layer; the inner acanthus and the outer acanthus are connected into a whole through a plurality of energy consumption connecting devices; each energy dissipation connecting device comprises an energy dissipation steel plate and a GFRP pultruded profile plate, the two ends of the GFRP pultruded profile plate are connected with the energy dissipation steel plates, and the connecting position of each energy dissipation steel plate and the GFRP pultruded profile plate can be adjusted. The problems of connection damage and deformation existing in a traditional assembly type sandwich heat preservation wall are effectively solved, the connection performance and the anti-seismic performance are comprehensively met, and meanwhile the heat bridge breaking effect, the adjustable performance and the certain self-repairing performance are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building structures, and particularly relates to an adjustable-thickness and self-repairing sandwich wall and its construction method. Background Art

[0002] Prefabricated buildings are a modern form of construction, and their core concept is to prefabricate components in a factory and then assemble them on-site. This construction method has the advantages of short construction period, controllable quality, resource conservation, etc., and has received extensive attention and application. In prefabricated buildings, the sandwich insulation wall, as one of the common enclosure structure forms, is of great significance in terms of insulation performance, construction efficiency, and overall building performance.

[0003] However, there are still some problems with traditional sandwich insulation walls. One is about the design and performance of connectors. Currently, common connection methods such as threaded metal rod connections can meet certain structural strength requirements, but there are the following problems: 1) Insufficient connection performance: Traditional connection methods such as threaded metal rod connections have insufficient connection performance, which easily leads to loosening or falling off of the connection parts of the wall, affecting the overall stability and safety of the wall. 2) Thermal bridge effect: Traditional connectors usually use metal materials with high thermal conductivity, which easily form thermal bridges, resulting in increased heat loss of the wall, affecting the insulation performance, and increasing the energy consumption of the building. 3) Insufficient seismic performance: The energy dissipation capacity of traditional connectors is limited in extreme situations such as earthquakes, and they cannot effectively buffer the structural vibrations caused by earthquakes, resulting in the wall being easily damaged or destroyed. The current seismic performance of prefabricated sandwich insulation walls in extreme situations such as earthquakes needs to be improved. It is necessary to increase the energy dissipation capacity of the wall and improve its seismic performance to ensure the safety of the building structure. The second is that the thickness of the insulation layer of traditional sandwich walls is often not adjustable, which limits their application in different building projects. The third is that there are certain defects in the energy efficiency and durability of existing insulation walls. Especially when damaged after an earthquake, the insulation performance is significantly reduced, and the repair difficulty is large, requiring high labor and material costs.

[0004] Therefore, there is a need for a sandwich wall and its construction method that meet connection performance, seismic performance, and at the same time have the functions of heat bridge breaking, adjustable performance, and certain self-repairing performance. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an adjustable-thickness and self-repairing sandwich wall and its construction method. The technical problems to be solved by the present invention are achieved through the following technical solutions:

[0006] The present invention provides an adjustable-thickness and self-healing sandwich wall, comprising: an inner leaf panel, a thermal insulation layer, an outer leaf panel, and a plurality of energy-dissipating connection devices. Among them, the thermal insulation layer is arranged between the inner leaf panel and the outer leaf panel, and epoxy resin microspheres are filled in the thermal insulation layer. The epoxy resin microspheres rupture under pressure for curing and repairing the thermal insulation layer; the inner leaf panel and the outer leaf panel are connected into a whole through the plurality of energy-dissipating connection devices; each energy-dissipating connection device includes: an energy-dissipating steel plate and a GFRP pultruded profile plate. Both ends of the GFRP pultruded profile plate are connected to the energy-dissipating steel plate, and the connection position of each energy-dissipating steel plate and the GFRP pultruded profile plate is adjustable.

[0007] In an embodiment of the present invention, the inner leaf panel and the outer leaf panel have the same structure, and a plurality of bolt connection grooves are provided thereon. An embedded plate is provided in each bolt connection groove.

[0008] In an embodiment of the present invention, a plurality of slot holes are provided on the thermal insulation layer, and the plurality of energy-dissipating connection devices respectively pass through the plurality of slot holes to connect the inner leaf panel and the outer leaf panel.

[0009] In an embodiment of the present invention, multiple rows of adjustment holes are provided on each energy-dissipating steel plate, and the GFRP pultruded profile plate is detachably connected to the energy-dissipating steel plate through bolts with any one row of adjustment holes.

[0010] In an embodiment of the present invention, a connecting plate is provided at one end of each energy-dissipating steel plate away from the GFRP pultruded profile plate, and the connecting plate and the embedded plate are connected by high-strength bolts.

[0011] In an embodiment of the present invention, by adjusting the connection position of the GFRP pultruded profile plate and the adjustment holes on the energy-dissipating steel plate, the distance between the two connecting plates is changed so that the distance between the two connecting plates is equal to the thickness of the thermal insulation layer.

[0012] In an embodiment of the present invention, two GFRP pultruded profile plates are provided. The two GFRP pultruded profile plates are arranged in parallel and are respectively detachably connected to the energy-dissipating steel plate.

[0013] In an embodiment of the present invention, in the thermal insulation layer, the density of the epoxy resin microspheres near the energy-dissipating connection device is higher than the density of the epoxy resin microspheres at the remaining positions on the thermal insulation layer.

[0014] In an embodiment of the present invention, all bolt connection grooves on the inner leaf panel and the outer leaf panel are filled with concrete to form a structural reinforcement layer.

[0015] The present invention also provides a construction method for an adjustable-thickness and self-healing sandwich wall, which is used for the construction of the above-mentioned adjustable-thickness and self-healing sandwich wall. The method includes:

[0016] Step 1: According to the preset thickness of the insulation layer, adjust the length of the energy-dissipating connection device through the adjustment holes, and respectively fix the energy-dissipating steel plate to the GFRP pultruded profile plate and the energy-dissipating steel plate to the connecting plate;

[0017] Step 2: Prepare bolt connection grooves on the inner leaf panel and the outer leaf panel respectively, embed the embedded plates in the bolt connection grooves of the inner leaf panel and the outer leaf panel correspondingly, and prepare bolt connection holes in the corresponding bolt connection grooves;

[0018] Step 3: Prepare an insulation layer containing epoxy microspheres, and open slots on the insulation layer. Dock the energy-dissipating connection device with the insulation layer according to the slot positions;

[0019] Step 4: Hoist the inner leaf panel and the outer leaf panel to the installation positions respectively, then install the energy-dissipating connection device and the insulation layer between the inner leaf panel and the outer leaf panel. Pass high-strength bolts through the connecting plate and the embedded plate in sequence, and connect them to the bolt connection holes in the bolt connection grooves;

[0020] Step 5: Fix the insulation layer to the inner leaf panel and the outer leaf panel respectively with adhesive;

[0021] Step 6: Fill the bolt connection grooves of the inner leaf panel and the outer leaf panel with concrete to complete the construction of the adjustable-thickness and self-healing sandwich wall.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] For the adjustable-thickness and self-healing sandwich wall of the present invention, the inner leaf panel and the outer leaf panel are connected by an energy-dissipating connection device. The energy-dissipating connection device uses a GFRP pultruded profile plate, which significantly reduces the thermal bridge effect and improves the seismic performance. At the same time, an energy-dissipating steel plate is used to absorb impact energy and protect the wall structure. The connection position between the GFRP pultruded profile plate and the energy-dissipating steel plate is adjustable and can be flexibly adapted according to the thickness of the insulation layer to meet diverse requirements. The insulation layer is filled with epoxy microspheres, which can cure to form a self-healing protective film after being compressed and broken, and timely restore the heat insulation function. Through the self-healing mechanism, the stability of the heat insulation performance is ensured, the aging and damage of the insulation layer material under external force are effectively slowed down, the service life and energy efficiency of the wall are extended, and a new solution is provided for the development of green buildings. The present invention effectively solves the problems of connection breakage and deformation existing in traditional prefabricated sandwich insulation walls, comprehensively meets the connection performance and seismic performance, and at the same time also has the functions of heat insulation bridge effect, adjustable performance and certain self-healing performance.

[0024] The construction method of the adjustable-thickness and self-healing sandwich wall of the present invention combines prefabricated construction with high-strength bolt connection, improving the assembly efficiency and maintenance convenience, and filling the slot holes with concrete to enhance the overall stability. The construction method has the characteristics of energy conservation, earthquake resistance, self-healing property, and construction convenience, reducing the maintenance cost and meeting the requirements of sustainable development of green buildings.

[0025] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. In order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically exemplified and described in detail with reference to the accompanying drawings. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of an adjustable-thickness and self-healing sandwich wall provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic structural diagram of an inner leaf panel provided by an embodiment of the present invention;

[0028] Figure 3 It is a schematic structural diagram of a thermal insulation layer provided by an embodiment of the present invention;

[0029] Figure 4 It is an exploded structural diagram of an energy-dissipating connection device provided by an embodiment of the present invention;

[0030] Figure 5 It is a flowchart of the construction method of the adjustable-thickness and self-healing sandwich wall provided by an embodiment of the present invention.

[0031] Reference Signs: 1 - Inner leaf panel; 2 - Thermal insulation layer; 21 - Epoxy resin microspheres; 22 - Slot holes; 3 - Outer leaf panel; 4 - Energy-dissipating connection device; 41 - Connection plate; 42 - Energy-dissipating steel plate; 421 - Adjusting holes; 43 - GFRP pultruded profile plate; 44 - High-strength bolts; 5 - Bolt connection groove; 6 - Embedded plate. Detailed Description of the Embodiments

[0032] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following provides a detailed description of an adjustable-thickness and self-healing sandwich wall and its construction method according to the present invention with reference to the accompanying drawings and specific embodiments.

[0033] The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the specific embodiments in conjunction with the accompanying drawings. Through the description of the specific embodiments, a more in-depth and specific understanding of the technical means and effects adopted by the present invention to achieve the predetermined purpose can be obtained. However, the accompanying drawings are only for reference and illustration, and are not used to limit the technical solution of the present invention.

[0034] Embodiment 1

[0035] In traditional sandwich walls, due to the use of high thermal conductivity metal materials for the connectors, a thermal bridge effect is formed, which exacerbates the heat loss of the wall. Moreover, the seismic design is weak, and it is difficult to absorb seismic energy, so it is easily damaged under extreme external forces. At the same time, the fixed thickness of the insulation layer limits its adaptability to different buildings. Especially, after the insulation layer is damaged, it cannot self-heal, resulting in a sudden drop in the insulation performance, and the post-earthquake repair relies on high-cost manual intervention. In view of this, this embodiment provides an adjustable-thickness and self-healing sandwich wall, as Figures 1 to 4 shown, Figure 1 is a schematic structural diagram of an adjustable-thickness and self-healing sandwich wall provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of the inner leaf panel provided by an embodiment of the present invention; Figure 3 is a schematic structural diagram of the insulation layer provided by an embodiment of the present invention; Figure 4 is an exploded structural diagram of the energy-dissipating connection device provided by an embodiment of the present invention.

[0036] In this embodiment, the adjustable-thickness and self-healing sandwich wall includes: an inner leaf panel 1, an insulation layer 2, an outer leaf panel 3, and a plurality of energy-dissipating connection devices 4. Among them, the insulation layer 2 is arranged between the inner leaf panel 1 and the outer leaf panel 3, and epoxy microspheres 21 are filled in the insulation layer 2. The epoxy microspheres 21 rupture under pressure for curing and repairing the insulation layer 2; the inner leaf panel 1 and the outer leaf panel 3 are connected into one body through a plurality of energy-dissipating connection devices 4; each energy-dissipating connection device 4 includes: an energy-dissipating steel plate 42 and a GFRP pultruded profile plate 43. Both ends of the GFRP pultruded profile plate 43 are connected to the energy-dissipating steel plate 42, and the connection position of each energy-dissipating steel plate 42 and the GFRP pultruded profile plate 43 is adjustable.

[0037] Exemplarily, the inner leaf panel 1 and the outer leaf panel 3 have the same structure, and the inner leaf panel 1 and the outer leaf panel 3 can use ordinary reinforced concrete materials.

[0038] Exemplarily, the insulation layer 2 can adopt composite insulation materials, such as polystyrene boards, polyurethane foams, etc., to improve the insulation performance of the wall and reduce energy consumption. Taking polyurethane foam as an example, the epoxy microspheres 21 and the polyurethane foam have good compatibility and do not react chemically with each other.

[0039] Furthermore, a plurality of slot holes 22 are provided on the heat insulation layer 2, and a plurality of energy-consuming connecting devices 4 respectively pass through the plurality of slot holes 22 to connect the inner leaf plate 1 and the outer leaf plate 3.

[0040] Specifically, for the sandwich wall with adjustable thickness and self-repairable function in this embodiment, the inner leaf plate 1, the heat insulation layer 2 and the outer leaf plate 3 are arranged in sequence. The inner leaf plate 1 and the outer leaf plate 3 are connected into an integral structure by a plurality of energy-consuming connecting devices 4. The length direction of each energy-consuming connecting device 4 is perpendicular to the surfaces of the inner leaf plate 1 and the outer leaf plate 3. At the same time, a plurality of slot holes 22 are also preset on the heat insulation layer 2 to enable the plurality of energy-consuming connecting devices 4 to pass through. Therefore, when the required thickness of the heat insulation layer 2 increases or decreases, the lengths of the plurality of energy-consuming connecting devices 4 can be adjusted to adapt to the required thickness of the heat insulation layer 2. It can be understood that the inner leaf plate 1 and the outer leaf plate 3 are fixed by hoisting. During the hoisting process, the distance between the inner leaf plate 1 and the outer leaf plate 3 can be adjusted according to the required thickness of the heat insulation layer 2 and the assembly requirements.

[0041] In an alternative embodiment, a plurality of bolt connection slots 5 are provided on both the inner leaf plate 1 and the outer leaf plate 3, and the structures of the bolt connection slots 5 on the inner leaf plate 1 and the outer leaf plate 3 are the same. Embedded plates 6 are provided in each bolt connection slot 5.

[0042] In an alternative embodiment, a connecting plate 41 is provided at one end of each energy-consuming steel plate 42 away from the GFRP pultruded profile plate 43. The connecting plate 41 and the embedded plate 6 are connected by high-strength bolts 44. Fixing by high-strength bolts 44 is convenient for later disassembly and replacement.

[0043] Exemplarily, the energy-consuming steel plate 42 and the connecting plate 41 are fixed by welding.

[0044] Exemplarily, through holes are provided on the connecting plate 41 for connecting with the embedded plate 6, the inner leaf plate 1 and the outer leaf plate 3 by high-strength bolts 44.

[0045] Specifically, both the connecting plate 41 and the embedded plate 6 are made of high-strength steel plates, which can withstand the stress and deformation under external forces such as earthquakes. The embedded plate 6 is arranged in the bolt connection slot 5 on the inner leaf plate 1 and the outer leaf plate 3, and bolt connection holes are provided in the embedded plate 6 and the bolt connection slot 5. The connecting plate 41 is fixed to the bolt connection hole of the embedded plate 6 by high-strength bolts 44, so that the inner leaf plate 1 and the outer leaf plate 3 are connected into an integral structure through the energy-consuming connecting device 4. Connecting by high-strength bolts 44 can not only ensure the connection strength, but also facilitate replacement and maintenance, and can solve the problem that it is difficult to repair the wall structure due to node damage in the project.

[0046] Exemplarily, the energy-dissipating steel plate 42 can be made of steel with good ductility and toughness, and dissipate energy through yield deformation or damping, such as by adding alloying elements such as manganese, silicon, chromium, etc. to improve the comprehensive performance of the steel.

[0047] It should be noted that when an earthquake occurs, the energy-dissipating steel plate 42 absorbs and dissipates seismic energy through the above-mentioned energy-dissipating mechanism, reduces the vibration amplitude of the wall, and prevents the wall from cracking and damage; it can provide sufficient bearing capacity during minor earthquakes to ensure the safety of the main structure, and during major earthquakes, it can fully exert its ductility to dissipate energy, reducing the seismic energy received by important structures and maximizing the safety of the main structure, thereby improving the seismic performance and safety of the entire building structure. That is, the role of the energy-dissipating steel plate 42 is to absorb part of the energy by exerting its energy-dissipating function when the wall is subjected to external impact, protecting the main structure from damage.

[0048] In an alternative embodiment, multiple rows of adjustment holes 421 are provided on each energy-dissipating steel plate 42, and the GFRP pultruded profile plate 43 is detachably connected to the energy-dissipating steel plate 42 through bolts with any one row of adjustment holes 421.

[0049] Exemplarily, the adjustment holes 421 are provided as multiple rows of equally spaced round holes or oblong holes, and the spacing matches the adjustment requirements of the insulation layer thickness.

[0050] In an alternative embodiment, two GFRP pultruded profile plates 43 are provided. The two GFRP pultruded profile plates 43 are arranged side by side and are respectively detachably connected to the energy-dissipating steel plate 42. By arranging the two GFRP pultruded profile plates 43 side by side, their shear strength can be enhanced.

[0051] For the case where the required thickness of the insulation layer 2 is different, the length adjustment principle of the energy-dissipating connection device 4 is as follows: The two GFRP pultruded profile plates 43 clamp the energy-dissipating steel plates 42 at both ends and are fixed by high-strength bolts 44. Multiple rows of adjustment holes 421 are provided on the energy-dissipating steel plate 42. By adjusting the connection position of the adjustment holes 421 on the GFRP pultruded profile plate 43 and the energy-dissipating steel plate 42, the distance between the two connecting plates 41 is changed. The two connecting plates 41 are respectively used to connect the embedded plates 6 on the inner leaf plate 1 and the outer leaf plate 3, so that the distance between the two connecting plates 41 is equal to the thickness of the insulation layer 2.

[0052] It should be noted that the GFRP (Glass Fiber Reinforced Plastic) pultruded profile board 43 is a composite material with glass fiber and its products as the reinforcing material and synthetic resin as the matrix material, which has the characteristics of high strength, light weight, corrosion resistance and low thermal conductivity. In particular, the high strength of glass fiber enables GFRP to withstand large tensile and compressive forces, and it has high tensile strength and flexural strength, which can meet the load-bearing requirements of various engineering structures. At the same time, using the GFRP pultruded profile board 43 can also effectively reduce heat conduction and play the role of heat insulation bridge breaking effect, because the GFRP material itself has a low thermal conductivity, which means that its ability to conduct heat is weak. In a building structure, when GFRP is used as a connecting part, it can effectively reduce the transfer of heat from the high-temperature area to the low-temperature area, thereby reducing the influence of the heat bridge effect and improving the thermal insulation performance of the building.

[0053] In an alternative embodiment, within the thermal insulation layer 2, the density of the epoxy microspheres 21 near the energy-consuming connecting device 4 is higher than that of the epoxy microspheres 21 at the remaining positions on the thermal insulation layer 2 (such as a 30% increase in density). Specifically, through gradient distribution design, the density of the epoxy microspheres 21 is locally increased around the slot holes 22 while ensuring the overall uniformity of the thermal insulation layer 2.

[0054] The working principle of the epoxy microspheres 21 is as follows: The epoxy microspheres 21 can rupture under pressure (such as external forces like earthquakes and impacts), thereby releasing epoxy resin. When the wall is impacted by external forces or cracks occur, the epoxy microspheres 21 rupture, releasing epoxy resin, which can flow and penetrate into the cracks or defects to fill the damaged area and achieve self-repair. A curing agent is also encapsulated in the epoxy microspheres 21, which undergoes a curing reaction when in contact with air after pressure rupture and forms a strong protective film after curing to prevent further damage and restore the heat insulation and thermal insulation functions of the wall, ensuring that good thermal insulation effect and connection ability can still be maintained after an earthquake. Due to the realization of the self-repair function, the maintenance requirements after the damage of the sandwich wall are greatly reduced, bringing economic benefits.

[0055] In an alternative embodiment, all the bolt connection slots 5 on the inner leaf board 1 and the outer leaf board 3 are filled with concrete to form a structural reinforcement layer.

[0056] It should be noted that the adjustable-thickness and self-healing sandwich wall of this embodiment has good connection performance, can effectively fix wall components, and ensure the overall stability and safety of the wall. At the same time, by using low-thermal-conductivity materials or designing heat-insulating structures, the thermal bridge effect can be reduced, the heat loss of the wall can be lowered, and the heat preservation performance can be improved. Also, through the energy-dissipating steel plate 42, the sandwich wall has a certain energy-dissipating ability, can play an energy-absorbing role in extreme situations such as earthquakes, improve the seismic performance of the wall, and reduce structural damage. In addition, it can be adjusted according to the thickness of the middle heat-insulating layer 2 to meet different design requirements. It improves the safety, energy efficiency, seismic resistance, adjustability, and self-healing performance of the building structure. Its construction is convenient, prefabricated in the factory throughout the process and assembled at the construction site. The inner leaf panel 1 and the outer leaf panel 3 can be prefabricated separately, which is different from the traditional integrated layered casting of sandwich walls, improving production efficiency and ensuring construction quality. It can achieve rapid assembly and repair, thus reducing the energy consumption of the building, improving the heat preservation performance of the building, and saving labor and time costs.

[0057] The adjustable-thickness and self-healing sandwich wall of the present invention connects the inner leaf panel and the outer leaf panel through an energy-dissipating connection device. The energy-dissipating connection device uses a GFRP pultruded profile board, which significantly reduces the thermal bridge effect and improves the seismic performance; at the same time, an energy-dissipating steel plate is used to absorb impact energy and protect the wall structure; the connection position between the GFRP pultruded profile board and the energy-dissipating steel plate is adjustable and can be flexibly adapted according to the thickness of the heat-insulating layer to meet diverse requirements. The heat-insulating layer is filled with epoxy microspheres, which can cure to form a self-healing protective film after being compressed and broken, and promptly restore the heat-insulating function. Through the self-healing mechanism, the stability of the heat preservation performance is ensured, the aging and damage of the heat-insulating layer material under external force are effectively slowed down, the service life and energy efficiency of the wall are extended, and a new solution is provided for the development of green buildings. The present invention effectively solves the problems of connection breakage and deformation existing in traditional prefabricated sandwich heat-insulating walls, fully meets the connection performance and seismic performance, and at the same time also has the functions of heat bridge breaking effect, adjustable performance, and certain self-healing performance.

[0058] Embodiment 2

[0059] As Figure 5 shown, Figure 5 is a flowchart of the construction method of the adjustable-thickness and self-healing sandwich wall provided by the embodiment of the present invention.

[0060] This embodiment provides a construction method for an adjustable-thickness and self-healing sandwich wall, which is used for the construction of the adjustable-thickness and self-healing sandwich wall in Embodiment 1. The method includes:

[0061] Step 1: According to the preset thickness of the insulation layer, adjust the length of the energy-consuming connection device through the adjustment holes, and fix the energy-consuming steel plate to the GFRP pultruded profile plate and the energy-consuming steel plate to the connecting plate respectively.

[0062] Specifically, first determine the thickness of the insulation layer according to the building requirements, then select the corresponding hole-opening positions of the energy-consuming steel plates, fix the two ends of the two GFRP pultruded profile plates to the energy-consuming steel plates through high-strength bolts, and then fix and connect the two energy-consuming steel plates to the connecting steel plates by welding respectively, and reserve connection holes on the connecting plates.

[0063] Step 2: Prepare bolt connection grooves on the inner leaf panel and the outer leaf panel respectively, embed the embedded plates into the bolt connection grooves of the inner leaf panel and the outer leaf panel correspondingly, and prepare bolt connection holes in the corresponding bolt connection grooves.

[0064] Step 3: Prepare an insulation layer containing epoxy microspheres, open slots on the insulation layer, and dock the energy-consuming connection device with the insulation layer according to the slot positions.

[0065] Specifically, add epoxy microspheres on the basis of making a common insulation layer, and then according to the design requirements, confirm the connection positions on the insulation layer, and add more epoxy microspheres near the connection positions, so that when the epoxy microspheres rupture and release the self-healing components to realize the self-repair of the insulation layer, more epoxy resin can penetrate out to form a protective coating on the energy-consuming connection device, protecting and repairing the energy-consuming connection device.

[0066] Furthermore, mark the dimensions of the energy-consuming connection device on the insulation layer, and perform slotting at appropriate positions. The slotting can be prefabricated in the factory or prepared on-site, but it is necessary to ensure accurate positions and precise dimensions to prevent the positions from not corresponding during splicing.

[0067] It should be noted that during the preparation process of the inner leaf panel and the outer leaf panel, it is necessary to reasonably arrange the positions and quantities of the embedded plates according to the design requirements to ensure good cooperation between the embedded plates and the energy-consuming connection device. At the same time, the slotting of the insulation layer and the docking with the energy-consuming connection device also need to be carried out strictly in accordance with the design requirements to ensure the sealing and stability of the connection.

[0068] Step 4: Lift the inner leaf panel and the outer leaf panel to the installation positions respectively, and then install the energy-consuming connection device and the insulation layer between the inner leaf panel and the outer leaf panel. Pass high-strength bolts through the connecting plate and the embedded plate in sequence and connect them to the bolt connection holes in the bolt connection grooves.

[0069] Specifically, lift the inner leaf panel and the outer leaf panel to the corresponding positions respectively. After the two wall panels meet the vertical requirements, install the energy-consuming connection device. The two ends of the energy-consuming connection device are connected to the embedded plates through high-strength bolts respectively.

[0070] It should be noted that during the construction process, the quality and workmanship of each step need to be strictly controlled. Especially during the connection of the energy-consuming connection device and the fixation with the embedded plate, the welding process should meet the relevant standard requirements, and the bolt tightening force should be appropriate to ensure the firmness and stability of the connection.

[0071] Step 5: Fix the insulation layer to the inner leaf and the outer leaf respectively with adhesive.

[0072] Step 6: Fill the bolt connection grooves of the inner leaf and the outer leaf with concrete to complete the construction of the sandwich wall with adjustable thickness and self-repairing function.

[0073] Specifically, after the inner leaf and the outer leaf are both fixed by the energy-consuming connection device, the bolt connection grooves on the inner leaf and the outer leaf are filled with concrete, such as using C30 fine aggregate concrete to fill the bolt connection grooves to form a structural reinforcement layer.

[0074] It is worth noting that the inner and outer leaves and the insulation layer are connected by multiple energy-consuming connection devices to form an integral sandwich wall structure. Under the action of external forces such as earthquakes, the swing deformation occurs to reduce the damage of the building structure, improve the seismic performance, and thus protect the safety of the building and its internal facilities and personnel.

[0075] In addition, compared with the construction of traditional cast-in-place concrete structures, most of the structures of the present invention can be fabricated in the factory. Since the environment in the factory is controllable, the quality of the products is guaranteed to the greatest extent. The assembly line work can greatly improve the assembly efficiency, and problems can be adjusted in time to avoid repeated transportation. In addition, compared with traditional sandwich walls, the structure of the present invention is simple, the construction is convenient, the requirements for the production and installation accuracy of components are not high, the requirements for the operation of on-site workers are also low, and at the same time, the quality is easy to guarantee and the construction quality is easy to detect.

[0076] The construction method of the sandwich wall with adjustable thickness and self-repairing function of the present invention combines prefabricated construction with high-strength bolt connection to improve the assembly efficiency and maintenance convenience, and the overall stability is enhanced by filling the grooves with concrete. The construction method has the characteristics of energy conservation, seismic resistance, self-repairing and construction convenience, reduces the maintenance cost, and meets the requirements of sustainable development of green buildings.

[0077] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the article or device comprising the element. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The orientation or positional relationship indicated by "up", "down", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention.

[0078] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A sandwich wall with adjustable thickness and self-repairability, characterized in that: include: An inner blade (1), a heat-insulating layer (2), an outer blade (3) and a plurality of energy-consuming connection devices (4), wherein: The thermal insulation layer (2) is arranged between the inner blade (1) and the outer blade (3), and the thermal insulation layer (2) is filled with epoxy resin microspheres (21). The epoxy resin microspheres (21) rupture under pressure and are used to cure and repair the thermal insulation layer (2); The inner blade (1) and the outer blade (3) are connected as a whole via a plurality of energy-dissipating connection devices (4); Each of the energy-absorbing connecting devices (4) comprises: an energy-absorbing steel plate (42) and a GFRP pultruded profile plate (43); both ends of the GFRP pultruded profile plate (43) are connected to the energy-absorbing steel plate (42); and the connection position between each energy-absorbing steel plate (42) and the GFRP pultruded profile plate (43) is adjustable.

2. The adjustable thickness and self-repairable sandwich wall according to claim 1, characterized in that The inner blade plate (1) and the outer blade plate (3) have the same structure and are both provided with a plurality of bolt connection grooves (5), and each of the bolt connection grooves (5) is provided with an embedded plate (6).

3. The adjustable thickness and self-repairable sandwich wall according to claim 1, characterized in that: The thermal insulation layer (2) is provided with a plurality of slots (22), and the plurality of energy dissipation connection devices (4) pass through the plurality of slots (22) in a one-to-one correspondence to respectively connect the inner blade plate (1) and the outer blade plate (3).

4. The adjustable thickness and self-repairable sandwich wall according to claim 2, characterized in that: Each of the energy-absorbing steel plates (42) is provided with a plurality of rows of adjustment holes (421), and the GFRP pultruded profile plate (43) can be detached from the energy-absorbing steel plate (42) by bolts connected to any row of adjustment holes (421).

5. The adjustable thickness and self-repairable sandwich wall according to claim 4, characterized in that A connecting plate (41) is provided at one end of each energy-absorbing steel plate (42) away from the GFRP pultruded profile plate (43), and the connecting plate (41) is connected to the embedded plate (6) via high-strength bolts (44).

6. The adjustable thickness and self-repairable sandwich wall according to claim 5, characterized in that By adjusting the connection position of the adjustment hole (421) on the GFRP pultruded profile plate (43) and the energy-absorbing steel plate (42), the distance between the two connecting plates (41) is changed so that the distance between the two connecting plates (41) is equal to the thickness of the thermal insulation layer (2).

7. The adjustable thickness and self-repairable sandwich wall according to claim 1, characterized in that Two GFRP pultruded profile plates (43) are provided, and the two GFRP pultruded profile plates (43) are arranged in parallel and are respectively detachably connected to the energy-absorbing steel plates (42).

8. The adjustable thickness and self-repairable sandwich wall according to claim 1, characterized in that In the thermal insulation layer (2), the density of the epoxy resin microspheres (21) near the energy dissipation connection device (4) is higher than the density of the epoxy resin microspheres (21) at other locations on the thermal insulation layer (2).

9. The adjustable thickness and self-repairable sandwich wall according to claim 1, characterized in that All the bolt connection grooves (5) on the inner blade plate (1) and the outer blade plate (3) are filled with concrete to form a structural reinforcement layer.

10. A method for constructing a sandwich wall with adjustable thickness and self-repairability, characterized in that: The method for constructing a sandwich wall with adjustable thickness and self-repairability according to any one of claims 1 to 9 comprises: Step 1: According to the preset thickness of the insulation layer, the length of the energy-absorbing connecting device is adjusted through the adjusting hole to respectively fix the energy-absorbing steel plate and the GFRP pultruded profile plate, and the energy-absorbing steel plate and the connecting plate; Step 2: preparing bolt connection grooves on the inner blade plate and the outer blade plate respectively, embedding the embedded plates in the bolt connection grooves of the inner blade plate and the outer blade plate respectively, and preparing bolt connection holes in the corresponding bolt connection grooves; Step 3: preparing a thermal insulation layer containing epoxy resin microspheres, opening slots on the thermal insulation layer, and connecting the energy dissipation connection device to the thermal insulation layer according to the slot positions; Step 4: hoist the inner blade plate and the outer blade plate to the installation position respectively, then install the energy dissipation connection device and the insulation layer between the inner blade plate and the outer blade plate, and pass the high-strength bolts through the connection plate and the embedded plate in sequence, and connect them to the bolt connection holes in the bolt connection grooves; Step 5: fix the insulation layer to the inner blade plate and the outer blade plate respectively by adhesive; Step 6: Fill the bolt connection grooves of the inner blade plate and the outer blade plate with concrete to complete the construction of the sandwich wall with adjustable thickness and self-repairability.

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