Prefabricated parapet wall structure of assembly type ultra-low energy consumption building

Abstract

The utility model relates to the field of building outer walls, in particular to an assembly type ultra-low energy consumption building prefabricated parapet wall structure which comprises a prefabricated concrete sandwich parapet wall, a roof and a parapet wall structure. The prefabricated concrete sandwich parapet wall comprises a prefabricated concrete outer acanthus, a sandwich heat preservation layer and a prefabricated concrete parapet wall body. A roof sloping layer, a roof waterproof vapor-proof layer, a roof heat preservation layer and a roof waterproof layer are sequentially laid on the roof structure; a parapet wall insulating layer is arranged on the inner side of the precast concrete parapet wall, and A-level insulating materials are arranged on the upper side; the additional waterproof layer is in lap joint with the roof waterproof layer, the waterproof coiled material is laid on the outer side of the A-level heat preservation material, anchor bolts are arranged on the top of the prefabricated concrete parapet wall and connected with the steel plate, and the main keel, the auxiliary keel, the metal connecting piece and the aluminum plate coping are sequentially arranged on the embedded steel plate. By the adoption of the technical scheme, the problems of heat preservation broken bridges and water prevention at the parapet wall of the ultra-low energy consumption fabricated building are solved, the durability and the installation speed of the building are improved, and the industrial development of the building is promoted.

Description

Technical Field

[0001] The present invention relates to the field of building exterior walls, and in particular to a structure of an assembled ultra-low energy consumption prefabricated parapet. Background Art

[0002] Prefabricated buildings and ultra-low-energy buildings have experienced rapid growth in recent years, representing a key direction for low-carbon and energy-efficient construction. With a growing number of design projects, the outlook for their development is promising. Currently, few examples of combining prefabricated and ultra-low-energy building technologies exist within the building technology landscape. This is particularly true when prefabricated building exteriors utilize precast concrete sandwich wall panels, which simultaneously meet the requirements of ultra-low-energy buildings. Consequently, there is a lack of innovative and applied integrated technologies.

[0003] Key features of ultra-low-energy buildings include high-performance thermal insulation and airtightness, particularly in the building envelope. The parapet is a key element in the design of thermal insulation and airtightness within the envelope. Precast concrete sandwich wall systems are a type of prefabricated building envelope, particularly common in prefabricated residential buildings.

[0004] When ultra-low energy consumption prefabricated buildings adopt precast concrete sandwich exterior wall systems, the structural design of the parapet position must not only meet the design requirements of the precast sandwich panels for the exterior protection of the prefabricated building, but also need to meet the design requirements of thermal insulation and continuous airtightness of ultra-low energy consumption buildings. In addition, this position has higher requirements for the durability and waterproofness of the structural nodes.

[0005] There are related parapet technologies in the existing ultra-low energy consumption building technology. Among them, the utility model patent of "Ultra-low energy consumption building roof parapet insulation node CN220080538U" discloses a roof parapet insulation node, which relates to the field of ultra-low energy consumption buildings. A waterproof layer is provided on the roof, a slope is provided on the waterproof layer, a cold primer layer is provided on the slope, a vapor barrier layer is provided on the cold primer layer, an insulation layer is provided on the vapor barrier layer, a parapet is provided on the insulation layer on the outside of the roof, a waterproof membrane and an isolation layer are provided on the insulation layer in sequence, and the waterproof membrane and isolation layer extend to the inside and top of the parapet, a first surface layer is provided on the isolation layer on the roof, a first rainwater outlet is provided on the first surface layer, and the waterproof membrane, isolation layer, insulation layer and vapor barrier layer are provided below the first rainwater outlet, and a rainwater drainage pipe extending to the outside of the wall is provided. The cold primer layer, thermal insulation layer, waterproof membrane, and isolation layer can improve project quality, reduce building energy consumption, and enhance thermal insulation and waterproof performance, effectively extending the service life of the building and reducing the number of subsequent maintenance. The utility model patent for "A parapet construction node for passive low-energy buildings without thermal bridges" discloses a parapet construction node for passive low-energy buildings without thermal bridges, comprising a main structure, an insulation structure, and a waterproof structure disposed on the outside of the main structure. The main structure comprises a roof panel, a parapet, and a parapet cap. The parapet cap is provided with a thermal break structure. The waterproof structure comprises a waterproof vapor barrier layer laid on a leveling layer on the roof panel. The insulation structure comprises a roof insulation layer laid on the waterproof vapor barrier layer. A roof waterproof layer and a roof waterproof protective layer are sequentially laid on the roof insulation layer. The thermal break structure comprises a thermal break pad fixed to the parapet cap, a bracket connected to the thermal break pad, and a roof parapet cap metal plate fixed to the bracket by screws. The construction structure of this application can not only ensure that the thermal insulation measures are closed and continuous, but also extend the life of the insulation system. It has the characteristics of safety and applicability, and has good promotion and practical value. After widespread promotion and application, it will produce good economic benefits.

[0006] Existing technical means can independently meet the structural design requirements of the parapet position of ultra-low energy consumption buildings, but lack the structural design of ultra-low energy consumption parapets under the assembled precast concrete sandwich exterior wall system. The existing technology cannot effectively adapt to the installation and construction requirements of precast concrete sandwich exterior wall parapets, and cannot provide effective on-site installation guidance.

[0007] The structure of the prefabricated parapet of an assembled ultra-low energy consumption building provided by the present invention can effectively solve the above problems, ensuring the thermal insulation performance, airtightness performance and feasibility of on-site construction of the building. Summary of the Invention

[0008] In response to the problems in the background technology, in order to solve the thermal insulation performance, airtightness, waterproof and airtightness and construction and installation feasibility of the parapet position structure in the prefabricated concrete sandwich exterior wall system of ultra-low energy consumption prefabricated buildings, improve building performance and shorten the construction period, the present invention proposes a structure of a prefabricated parapet for prefabricated ultra-low energy consumption buildings.

[0009] A prefabricated parapet structure for an assembled ultra-low energy consumption building comprises a prefabricated concrete sandwich parapet, a roof and a parapet structure, wherein the prefabricated concrete sandwich parapet comprises a prefabricated concrete outer blade 7, a sandwich insulation layer 8 and a prefabricated concrete parapet 9; the roof comprises a roof horizontal structure 10, a roof insulation layer 11, an additional waterproof layer 12, a roof waterproof layer 13, a roof slope layer 20 and a roof waterproof vapor barrier 21; the parapet structure comprises an aluminum plate capping 1, a secondary keel 2, a waterproof roll 3, a metal connector 4, a building weatherproof sealant 5, a foamed polyethylene rod 6, a parapet insulation layer 14, an anchor bolt 15, a main keel 16, an embedded steel plate 17, an insulating gasket 18 and a Class A insulation material 19; the roof horizontal structure 10 is sequentially paved with a roof slope layer 20, a roof waterproof vapor barrier 21, a roof insulation layer 11 and a roof waterproof layer 13; the parapet insulation layer 14 It is laid on the inner side of the precast concrete parapet 9, the Class A thermal insulation material 19 is laid on the upper side of the precast concrete parapet 9, the additional waterproof layer 12 is overlapped on the roof waterproof layer 13 and laid on the parapet insulation layer 14, the waterproof membrane 3 is laid on the outside of the Class A thermal insulation material 19, and anchor bolts 15 are provided on both the inner and outer sides of the top of the precast concrete parapet 9. An embedded steel plate 17 is provided on the outside of the anchor bolt 15, and the thermal insulation gasket 18 is located between the embedded steel plate 17 and the precast concrete parapet 9. A main keel 16 is provided on the embedded steel plate 17, a secondary keel 2 is provided on the main keel 16, and a metal connector 4 is provided on the secondary keel 2. An aluminum plate top 1 is fixed to the outside of the metal connector 4, and the building weather-resistant sealant 5 and the foamed polyethylene rod 6 are both provided between the aluminum plate top 1 and the precast concrete outer blade 7, and the building weather-resistant sealant 5 is located on the outside of the foamed polyethylene rod 6.

[0010] Furthermore, the sandwich insulation layer 8 in the precast concrete sandwich parapet structure is located on the outside of the precast concrete parapet 9, and the precast concrete outer blade 7 is located on the outside of the sandwich insulation layer 8. All components are prefabricated in the factory to form standard module products. After hoisting and positioning at the construction site, they are connected to the roof horizontal structure 10 through the sleeve grouting process to form a stable and firm structural layer.

[0011] Furthermore, the roof waterproof vapor barrier layer 21 is laid on the roof slope layer 20 and extends upward along the inner side of the precast concrete parapet 9 to the top of the precast concrete parapet 9. The roof insulation layer 11 is located on the roof waterproof vapor barrier layer 21. The roof waterproof layer 13 is composed of two layers of waterproof materials, the lower layer of which is located on the upper side of the roof insulation layer 11 and continues to be laid along the outer side of the upwardly extending roof waterproof vapor barrier layer 21 to the top of the precast concrete parapet 9. The parapet insulation layer 14 is located on the inner side of the upwardly extending part of the roof waterproof layer 13. The upper layer of waterproof material of the roof waterproof layer 13 is laid to the bottom of the parapet insulation layer 14 and overlaps with the additional waterproof layer 12, with an overlap length of not less than 300 mm. The additional waterproof layer 12 is two layers of waterproof material, and the additional waterproof layer 12 is laid on the outside of the parapet insulation layer 14.

[0012] Furthermore, embedded steel plates 17 are installed on the precast concrete parapet 9 through anchor bolts 15 on the inner and outer sides of the top of the precast concrete parapet 9, and thermal insulation gaskets 18 are arranged between the embedded steel plates 17 and the precast concrete parapet 9 to ensure the thermal bridge design at the precast parapet position.

[0013] Furthermore, the main keel 16 and the embedded steel plate 17 are fixed by welding, and the secondary keel 2 is installed on the outside of the main keel 16 to form an overall shape skeleton of the roof parapet top. The aluminum plate top 1 is connected to the secondary keel 2 through a connector 4. A foamed polyethylene rod 6 is arranged at the intersection of the aluminum plate top 1 and the precast concrete outer blade 7. The building weatherproof sealant 5 is located on the outside of the foamed polyethylene rod 6 to form the closed and waterproof performance of the parapet top part structure.

[0014] Furthermore, the Class A insulation material 19 is installed on the top of the precast concrete parapet 9 and extends downward outward by at least 100 mm to be connected to the sandwich insulation layer 8. The parapet insulation layer 14 is installed on the inner side of the precast concrete parapet 9 and is connected to the roof insulation layer 11 at the bottom to form a continuous parapet insulation system. The waterproof membrane 3 is laid to the outside of the Class A insulation material 19 and the parapet insulation layer 14 to ensure effective waterproof protection for the insulation within the parapet top pressure range. The position where the main keel 1 passes through the parapet insulation layer 14 or the Class A insulation material 19 needs to ensure that the insulation material is tightly filled, and there should be no gaps larger than 20 mm to avoid the generation of thermal bridges and air convection effects.

[0015] Furthermore, the sandwich insulation layer 8 is a one-layer or multi-layer structure, and the material of the sandwich insulation layer 8 is one of rock wool board, vacuum insulation board, extruded polystyrene board, graphite polystyrene board, rigid foam polyurethane board, rock wool and vacuum composite board, rock wool and extruded composite board or rigid foam polyurethane and vacuum insulation board composite board, the A-class insulation material 19 is one of rock wool board, polymer polystyrene insulation board or inorganic lightweight aggregate insulation board, and the building weather-resistant sealant 5 is silicone sealant.

[0016] Furthermore, the anchor bolts 15 are made of thermal insulation material to ensure that the thermal insulation bridges of the buildings at the connection node positions do not form cold bridges.

[0017] Furthermore, the aluminum plate top 1 is provided with a 5% inward slope to ensure timely drainage of the top of the top and protect the internal insulation and structural system.

[0018] Compared with the existing practices, the present invention has the following beneficial effects:

[0019] Since the precast concrete sandwich parapet is prefabricated during the factory production process, a large amount of on-site pouring construction work is avoided, which greatly improves the construction efficiency of the building's exterior wall and improves the accuracy and quality of the parapet wall.

[0020] Since the parapet insulation layer 14 and the Class A insulation material 19 are used to tightly wrap the precast concrete parapet 9, the insulation effect of the parapet is greatly improved, meeting the requirements of ultra-low energy consumption buildings.

[0021] Due to the provision of the embedded steel plate 17 and the thermal insulation gasket 18, the thermal bridge at the parapet position is effectively blocked, thereby improving the thermal insulation performance of the overall structure.

[0022] Due to the mutual overlap and continuous bonding of the additional waterproof layer 12, the waterproof membrane 3 and the roof waterproof layer 13, the excellent waterproof performance of the parapet and the roof system is ensured, and the insulation materials at various positions of the ultra-low energy consumption building structure are also protected.

[0023] The present invention greatly improves the durability of the parapet structure and the thermal insulation and waterproof performance, thereby improving the building quality through the application of prefabricated components and the design of high-performance thermal insulation and waterproof structures.

[0024] The present invention increases the overall durability of the building through refined design and construction, and is suitable for industrialized production and the promotion and application of passive houses. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of a prefabricated parapet for an assembled ultra-low energy consumption building;

[0026] Figure 2This is a diagram of the structure of precast concrete sandwich parapet components;

[0027] Figure 3 This is a diagram of the roof structure.

[0028] Description of reference numerals:

[0029] 1—Aluminum plate capping; 2—Secondary purlin; 3—Waterproof membrane; 4—Metal connectors; 5—Building weatherproof sealant; 6—Foamed polyethylene rod; 7—Precast concrete outer blade; 8—Sandwich insulation layer; 9—Precast concrete parapet; 10—Roof horizontal structure; 11—Roof insulation layer; 12—Additional waterproof layer; 13—Roof waterproof layer; 14—Parapet insulation layer; 15—Anchor bolt; 16—Main purlin; 17—Embedded steel plate; 18—Thermal insulation gasket; 19—Class A insulation material; 20—Roof slope layer; 21—Roof waterproof vapor barrier. DETAILED DESCRIPTION

[0030] The following describes the specific implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. The specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0031] Specific example 1:

[0032] Reference Figure 1 The utility model provides a structure of prefabricated parapet wall of assembled ultra-low energy consumption building

[0033] The precast concrete sandwich parapet comprises a precast concrete outer blade 7, a sandwich insulation layer 8, and a precast concrete parapet 9. The components are precast in a factory to form a standardized product and transported to the construction site for installation.

[0034] The precast concrete outer blade 7 is a 60mm reinforced concrete precast wall.

[0035] The precast concrete parapet 9 is a 200mm reinforced concrete precast wall.

[0036] The sandwich insulation layer 8 is an integrated insulation composed of 30mm rigid foam polyurethane + 30mm vacuum insulation board + 30mm rigid foam polyurethane. Each layer of insulation is prefabricated in the factory to ensure that the building exterior wall meets the insulation requirements of ultra-low energy consumption buildings.

[0037] During installation at the construction site, the horizontal roof structure 10 is constructed first, and the precast concrete sandwich parapet components are hoisted and installed in place at the construction site and then connected to the horizontal roof structure 10 through a sleeve grouting process.

[0038] After the precast concrete sandwich parapet and the roof horizontal structure 10 are connected and firmly fixed, the various layers of roof structural materials are constructed on site in sequence, mainly including the roof slope layer 20, the roof waterproof vapor barrier layer 21, the roof insulation layer 11 and the roof waterproof layer 13.

[0039] The roof waterproofing layer 13 is composed of two layers of SBS flexible waterproof material. The bottom waterproof layer is upturned by at least 250mm at the intersection with the precast concrete parapet 9. The upturned portion is closely attached to the precast concrete parapet 9 and firmly bonded to it. The upper waterproof layer and the additional waterproof layer 12 overlap each other with a width of at least 300mm.

[0040] The embedded steel plates 17 are installed on the precast concrete parapet 9 through anchor bolts 15 on the inner and outer sides of the top, and a thermal insulation gasket 18 should be provided between the embedded steel plates 17 and the precast concrete parapet 9 to ensure a thermal bridge at the precast parapet position.

[0041] The main keel 16 is welded and installed on the installed embedded steel plate 17, and the parapet insulation layer 14 is paved and installed on the inner side of the parapet. Class A insulation material 19 is paved on the top and outer gaps of the parapet and ensures that the material is tightly filled and firmly installed. The Class A insulation material is a hydrophobic rock wool board.

[0042] On the outside of the parapet insulation layer 14, the upper waterproof layer of the roof waterproof layer 13 is partially pasted and closed, and the additional waterproof layer 12 is laid, and it is ensured that the additional waterproof layer 12 is pasted at the starting end at the bottom above the upper waterproof closing position of the roof waterproof layer 13. The pasting distance should not be less than 50mm. The additional waterproof layer 12 is tightly pasted along the parapet insulation layer 14 all the way up to the top position.

[0043] The main keel 16 passes through the parapet insulation layer 14 and the local position of the A-class insulation material 19 to fill the insulation material tightly, and the waterproof membrane 3 is laid on the outside of the A-class insulation material 19 to ensure effective waterproof protection for the insulation within the parapet top pressure range.

[0044] After the basic construction of the parapet insulation layer 14 and waterproofing is completed, the secondary keel 2 is installed on the outside of the main keel 16 to form the overall shape skeleton of the roof parapet top. The aluminum plate top 1 is firmly installed on the keel system composed of the secondary keel 2 and its related skeleton through the metal connector 4, and the foamed polyethylene rod 6 is filled at the intersection of the roof top and the outer blade of the parapet, and then the building weather-resistant sealant 5 is applied on the outside to ensure the sealing and waterproof performance of the internal system of the top part.

[0045] The top of the aluminum plate top 1 forms an inward slope of 5% to ensure timely drainage of the top.

[0046] Specific example 2:

[0047] Reference Figure 1 The utility model provides a structure of prefabricated parapet wall of assembled ultra-low energy consumption building

[0048] The precast concrete sandwich parapet comprises a precast concrete outer blade 7, a sandwich insulation layer 8, and a precast concrete parapet 9. The components are precast in a factory to form a standardized product and transported to the construction site for installation.

[0049] The precast concrete outer blade 7 is a 65mm reinforced concrete precast integrated wall with a facing.

[0050] The precast concrete parapet 9 is a 200mm reinforced ceramsite concrete precast wall.

[0051] The sandwich insulation layer 8 is a composite insulation composed of 150mm rigid polyurethane foam + 50mm rock wool insulation board. Each layer of insulation is prefabricated and processed in the factory and connected with the prefabricated concrete outer blade 7 and prefabricated concrete parapet 9 in the factory to form an integrated sandwich parapet component.

[0052] The embedded steel plate 17 is accurately installed on the precast concrete parapet 9 in the factory according to the detailed design requirements and positioning.

[0053] The thermal insulation gasket 18 is a high-strength polyurethane elastomer gasket, which is placed between the embedded steel plate 17 and the precast concrete parapet 9 during prefabrication and installation in the factory.

[0054] The precast concrete sandwich parapet is firmly connected to the roof horizontal structure 10 at the construction site.

[0055] The main keel 16 and the secondary keel 2 are first connected and installed with each other at the construction site to form an integral curtain wall keel system, and then hoisted to the precast concrete parapet 9 and welded thereto on site.

[0056] The parapet insulation layer 14 is a 100mm extruded polystyrene board, and the A-grade insulation material 19 is an A-grade 80mm polymer polystyrene board, which are respectively installed on the inner side and upper side of the precast concrete parapet 9 at the construction site, and ensure that they are filled tightly between the curtain wall keels without leaving any gaps.

[0057] The roof waterproof layer 13, additional waterproof layer 12 and waterproof membrane 3 are all made of APP modified asphalt waterproof membrane, and are Figure 1 The method is to carry out pasting construction at the construction site.

[0058] At the construction site, the aluminum plate capping 1 is connected to the installed curtain wall keel system through the metal connector 4, and the foamed polyethylene rod 6 and the building weatherproof sealant 5 are installed in sequence from the inside to the outside at the connection between the upper end of the precast concrete outer blade 7 and the aluminum plate capping 1.

[0059] The above specific embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Although the present invention is described in detail with reference to examples, ordinary technicians in this field should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit of the technical solution of the present invention and the structure that protects the airtightness of the pipe penetration position of the building exterior wall, and effectively ensures the thermal insulation performance of the building exterior wall and the exterior wall system will not be eroded by external rainwater.

Claims

1. A prefabricated parapet structure for an assembled ultra-low energy consumption building, comprising a prefabricated concrete sandwich parapet, a roof, and a parapet structure, characterized by: The precast concrete sandwich parapet comprises a precast concrete outer blade (7), a sandwich insulation layer (8) and a precast concrete parapet (9); the roof comprises a roof horizontal structure (10), a roof insulation layer (11), an additional waterproof layer (12), a roof waterproof layer (13), a roof slope layer (20) and a roof waterproof vapor barrier (21); the parapet structure comprises an aluminum plate top (1), a secondary keel (2), a waterproof membrane (3), a metal connector (4), a building weatherproof sealant (5 ), foamed polyethylene rods (6), parapet insulation layer (14), anchor bolts (15), main keels (16), embedded steel plates (17), thermal insulation pads (18) and Class A thermal insulation materials (19), the roof horizontal structure (10) is sequentially paved with a roof slope layer (20), a roof waterproof vapor barrier (21), a roof insulation layer (11) and a roof waterproof layer (13), the parapet insulation layer (14) is paved on the inner side of the precast concrete parapet (9), the Class A thermal insulation material (19 ) is laid on the upper side of the precast concrete parapet (9), the additional waterproof layer (12) is overlapped on the roof waterproof layer (13) and laid on the parapet insulation layer (14), the waterproof membrane (3) is laid on the outside of the Class A insulation material (19), anchor bolts (15) are provided on both the inner and outer sides of the top of the precast concrete parapet (9), and embedded steel plates (17) are provided on the outside of the anchor bolts (15), and the thermal insulation gasket (18) is located between the embedded steel plates (17) and the precast concrete parapet ( 9), a main keel (16) is provided on the embedded steel plate (17), a secondary keel (2) is provided on the main keel (16), a metal connector (4) is provided on the secondary keel (2), an aluminum plate top (1) is fixed on the outside of the metal connector (4), the building weatherproof sealant (5) and the foamed polyethylene rod (6) are both provided between the aluminum plate top (1) and the precast concrete outer blade (7), and the building weatherproof sealant (5) is located on the outside of the foamed polyethylene rod (6).

2. The structure of the prefabricated parapet wall for an assembled ultra-low energy consumption building according to claim 1 is characterized by: The sandwich insulation layer (8) in the precast concrete sandwich parapet structure is located outside the precast concrete parapet (9), and the precast concrete outer blade (7) is located outside the sandwich insulation layer (8).

3. The structure of the prefabricated parapet wall for an assembled ultra-low energy consumption building according to claim 2 is characterized by: The roof waterproof vapor barrier layer (21) is laid on the roof slope layer (20) and extends upward along the inner side of the precast concrete parapet (9) to the top of the precast concrete parapet (9). The roof insulation layer (11) is located on the roof waterproof vapor barrier layer (21). The roof waterproof layer (13) is composed of two layers of waterproof materials, the lower layer of which is located on the upper side of the roof insulation layer (11) and continues to be laid along the outer side of the roof waterproof vapor barrier layer (21) extending upward to the top of the precast concrete parapet (9). A concrete parapet (9) is formed on the top, the parapet insulation layer (14) is located on the inner side of the upwardly extending portion of the roof waterproof layer (13), the upper layer of waterproof material of the roof waterproof layer (13) is laid to the bottom of the parapet insulation layer (14) and overlapped with the additional waterproof layer (12), the overlap length is not less than 300 mm, the additional waterproof layer (12) is two layers of waterproof material, and the additional waterproof layer (12) is laid on the outer side of the parapet insulation layer (14).

4. The structure of the prefabricated parapet for an assembled ultra-low energy consumption building according to claim 3 is characterized by: A heat insulating gasket (18) is provided between the embedded steel plate (17) and the precast concrete parapet (9).

5. The structure of the prefabricated parapet wall for an assembled ultra-low energy consumption building according to claim 4 is characterized in that: The main keel (16) is fixed to the embedded steel plate (17), the secondary keel (2) is installed on the outside of the main keel (16), the aluminum plate top (1) is connected to the secondary keel (2) through a connector (4), a foamed polyethylene rod (6) is provided at the intersection of the aluminum plate top (1) and the precast concrete outer blade (7), and the building weatherproof sealant (5) is located on the outside of the foamed polyethylene rod (6).

6. The structure of the prefabricated parapet wall for an assembled ultra-low energy consumption building according to claim 5 is characterized by: The Class A thermal insulation material (19) is installed on the top of the precast concrete parapet (9) and extends downward at least 100 mm to the outside to be connected to the sandwich thermal insulation layer (8); the parapet thermal insulation layer (14) is installed on the inner side of the precast concrete parapet (9) and is connected to the roof thermal insulation layer (11) at the bottom; the waterproof membrane (3) is paved to the outside of the Class A thermal insulation material (19) and the parapet thermal insulation layer (14).

7. The structure of the prefabricated parapet wall for an assembled ultra-low energy consumption building according to claim 6 is characterized by: The sandwich insulation layer (8) is a one-layer or multi-layer structure, and the material of the sandwich insulation layer (8) is selected from one of rock wool board, vacuum insulation board, extruded polystyrene board, graphite polystyrene board, rigid foam polyurethane board, rock wool and vacuum composite board, rock wool and extruded composite board or rigid foam polyurethane and vacuum insulation board composite board. The A-class insulation material (19) is selected from one of rock wool board, polymerized polystyrene insulation board or inorganic lightweight aggregate insulation board, and the building weather-resistant sealant (5) is silicone sealant.

8. The structure of the prefabricated parapet wall for an assembled ultra-low energy consumption building according to claim 7 is characterized in that: The anchor bolt (15) is made of a thermal break material.

9. The structure of the prefabricated parapet wall for an assembled ultra-low energy consumption building according to claim 8, characterized in that: The aluminum plate top (1) is provided with a 5% inward slope.

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