Cantilever gallery structure for weakening thermal bridge

Abstract

The utility model relates to the technical field of building structures, and provides a cantilever gallery structure for weakening a heat bridge, which comprises a structural floor slab, a structural boundary beam, a first outer wall heat insulation layer, a heat insulation plate, a first backfill layer, a second backfill layer and a second outer wall heat insulation layer, the inner side of the structural floor slab is fixedly connected with a building main body structural beam, and the outer side of the structural floor slab is fixedly provided with a structural boundary beam; a first outer wall heat preservation layer is arranged on the bottom face of the structural floor slab. A heat insulation plate is arranged on the structural floor slab; a first backfill layer is arranged above the structural floor and between the heat insulation plate and the building main body structural beam; a heat insulation plate and a second backfill layer are arranged above the structural floor and between the heat insulation plate and the structural boundary beam; the second backfill layer is arranged on the insulation board; a glass curtain wall is arranged on the heat insulation plate; a second outer wall heat preservation layer is arranged on the outer side of the structure edge beam. According to the utility model, the thermal bridge effect can be weakened, and the construction difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, and in particular to a cantilevered corridor structure that weakens thermal bridges. Background Technology

[0002] Cantilevered platforms are common structures in the construction industry, including cantilevered verandas, balconies, eaves, canopies, and air conditioning panels. Currently, cantilevered platforms are generally constructed using a fully cast-in-place reinforced concrete system to ensure structural reliability. However, the cantilevered platform structure disrupts the continuity and integrity of the building envelope's external insulation, and because the material is reinforced concrete with poor thermal insulation properties, it creates a significant thermal bridge effect. Therefore, cantilevered platforms are one of the most challenging thermal bridge nodes to manage in building external insulation systems.

[0003] A common feature of cantilevered platforms is the cantilevered veranda. The conventional construction utilizes cantilever beams (or cantilevered girders) to support the floor slab and the superstructure. A cantilever beam is a beam structure with one end fixed and the other end suspended freely. The fixed end (or support end) of the cantilever beam needs to account for the reaction forces generated by the beam under stress, usually requiring enhanced design to improve its stability. For example, the fixed end of the beam can be thickened, or an anchoring system can be added to strengthen the support. Therefore, compared to ordinary beams, cantilever beams generate a larger structural bridging area, resulting in a larger thermal bridge range and a more pronounced thermal bridging effect.

[0004] Thermal bridging has the following adverse effects on buildings: 1. Increased heating and cooling energy consumption due to heat loss; 2. Low interior surface temperatures leading to poor comfort and increased risk of mold and condensation; 3. Uneven heat distribution causing significant localized thermal expansion and contraction, affecting the service life of building components. The principle of mitigating thermal bridging is mainly through optimizing building structure and material selection, cutting off or reducing the path of heat through thermal bridges, reducing energy loss, and improving the building's thermal performance.

[0005] Currently, the common method for dealing with thermal bridges in cantilevered corridors is to wrap the entire structure with insulation material to reduce thermal bridging. However, the connection between the cantilevered corridor and the main building is long, often matching the length of the facade, resulting in a large area of ​​thermal bridging. The cantilevered corridor floor requires drainage, making it difficult to fully cover with insulation material, easily leading to thermal bridging. Since both the upper and lower surfaces of the floor slab of the cantilevered corridor need to be covered with insulation material, this results in a large amount of insulation material used, increasing investment costs. Furthermore, the complex shape of the cantilever beams at the bottom of the floor slab makes insulation installation difficult, increasing construction time and labor costs. If prefabricated thermally broken components are used, structural safety requires performance analysis and expert evaluation, which is also costly and requires significant capital investment. Utility Model Content

[0006] This utility model mainly addresses the technical problems of current cantilever corridors, which use insulation material to wrap the entire structure to reduce thermal bridges, resulting in a large amount of insulation material used, increased investment costs, and increased construction period and labor costs. It proposes a cantilever corridor structure that weakens thermal bridges, thereby reducing the thermal bridge effect and construction difficulty.

[0007] This utility model provides a cantilevered corridor structure that weakens thermal bridges, including: a structural floor slab, a structural edge beam, a first external wall insulation layer, a thermal break plate, a first backfill layer, a second backfill layer, and a second external wall insulation layer;

[0008] The inner side of the structural floor slab is fixedly connected to the main structural beam of the building, and the outer side of the structural floor slab is fixedly provided with structural edge beams.

[0009] A first external wall insulation layer is provided on the bottom surface of the structural floor slab; a thermal break plate is provided on the structural floor slab;

[0010] A first backfill layer is provided above the structural floor slab and between the thermal break plate and the main structural beam of the building;

[0011] An insulation board and a second backfill layer are installed above the structural floor slab and between the thermal break board and the structural edge beam; the second backfill layer is installed on the insulation board; a glass curtain wall is installed on the thermal break board;

[0012] A second external wall insulation layer is provided on the outside of the structural edge beam.

[0013] Preferably, the structural floor slabs and structural edge beams are both made of reinforced concrete.

[0014] Preferably, the heat insulation plate is made of high-density rigid polyurethane foam.

[0015] Preferably, a metal component is embedded in the first backfill layer; the glass curtain wall is fixed to the metal component.

[0016] Preferably, the first backfill layer and the second backfill layer are made of aerated concrete blocks or foamed concrete.

[0017] Preferably, the insulation board is a rigid polyurethane foam insulation board.

[0018] Preferably, a drainage system is provided on top of the second backfill layer.

[0019] The cantilevered corridor structure that weakens thermal bridges provided by this utility model has the following advantages compared with the prior art:

[0020] 1. The structural floor slab is located at the lower edge of the main structural beam of the building. The lowering method is used to make the bottom surface of the structure flat, which is conducive to the laying of external wall insulation materials and can ensure the construction quality and later effect of the insulation materials. The lowered slab area is backfilled with filler materials with low thermal conductivity (aerated concrete blocks or foamed concrete) to reduce the overall heat transfer coefficient of the cantilevered corridor.

[0021] 2. The glass curtain wall is installed using cantilevered metal components, which transforms linear thermal bridges into point thermal bridges, reducing heat loss. The thermal conductivity of the thermal break plate (high-density rigid polyurethane foam) under the glass curtain wall is lower than that of the backfill areas on both sides, effectively blocking heat loss.

[0022] 3. In terms of building envelope performance, insulation boards, a first external wall insulation layer, and a second external wall insulation layer are installed to effectively improve the thermal insulation performance of the building envelope and weaken the thermal bridge effect. In terms of construction technology, the difficulty of laying insulation materials is reduced and the quality of the project is improved. In terms of economy, the impact of thermal bridges in the cantilevered corridor structure is reduced and the cost is avoided, provided that the increase in investment is controllable. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram of the cantilevered corridor structure for weakening thermal bridges provided by this utility model.

[0024] Reference numerals in the attached drawings: 1. Main structural beam of the building; 2. Structural floor slab; 3. Structural edge beam; 4. Insulation board; 5. First backfill layer; 6. Second backfill layer; 7. First external wall insulation layer; 8. Second external wall insulation layer; 9. Thermal insulation board; 10. Metal component; 11. Glass curtain wall; 12. Drainage system. Detailed Implementation

[0025] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0026] like Figure 1 As shown in the figure, the cantilevered corridor structure for weakening thermal bridges provided by this utility model embodiment includes: a structural floor slab 2, a structural edge beam 3, a first external wall insulation layer 7, a thermal break plate 9, a first backfill layer 5, a second backfill layer 6, and a second external wall insulation layer 8.

[0027] The inner side of the structural floor slab 2 is fixedly connected to the main structural beam 1 of the building, and the structural floor slab 2 is located at the lower edge of the main structural beam 1; a structural edge beam 3 is fixedly installed on the outer side of the structural floor slab 2. A second external wall insulation layer 8 is installed on the outer side of the structural edge beam 3. A first external wall insulation layer 7 is installed on the bottom surface of the structural floor slab 2; a thermal break plate 9 is installed on the structural floor slab 2.

[0028] A first backfill layer 5 is provided above the structural floor slab 2 and between the thermal break plate 9 and the main structural beam 1; an insulation plate 4 and a second backfill layer 6 are provided above the structural floor slab 2 and between the thermal break plate 9 and the structural edge beam 3; the second backfill layer 6 is provided on the insulation plate 4; a glass curtain wall 11 is provided on the thermal break plate 9; specifically, a metal component 10 is embedded in the first backfill layer 5; the glass curtain wall 11 is fixed to the metal component 10, thereby realizing the installation of the glass curtain wall 11 above the thermal break plate 9.

[0029] The second backfill layer 6 is equipped with a drainage system 12 at the top to meet drainage requirements.

[0030] The main structural beam 1 of the building is made of reinforced concrete. The structural floor slab 2 and structural edge beams 3 are also made of reinforced concrete. The first external wall insulation layer 7 and the second external wall insulation layer 8 use conventional insulation materials found in the construction industry. The thermal break board 9 is made of high-density rigid polyurethane foam, which has a low thermal conductivity and good thermal insulation performance. The first backfill layer 5 and the second backfill layer 6 are made of aerated concrete blocks or foamed concrete, which have low thermal conductivity. The insulation board 4 is a 100mm thick rigid polyurethane foam insulation board.

[0031] The main structural beams 1, structural floor slabs 2, and structural edge beams 3 are the most basic supporting parts of this utility model structure; metal components 10 and glass curtain walls 11 are the building envelope, forming the building space; insulation boards 4, the first external wall insulation layer 7, and the second external wall insulation layer 8 are the main thermal insulation parts; the first backfill layer 5 and the second backfill layer 6 are the backfill areas. The area inside the main structural beams 1 is the indoor area, and the area outside the glass curtain walls 11 is the outdoor area.

[0032] The working principle of this utility model is as follows: The structural floor slab 2 is located at the lower edge of the main structural beam 1, forming a structural system with a flat bottom surface. The glass curtain wall 11 is fixed by metal components 10, and the glass curtain wall 11 is separated from the main structure, transforming linear thermal bridges into point thermal bridges. Below the glass curtain wall 11 is a thermal break board 9 (high-density rigid polyurethane foam board), which has a low thermal conductivity and good thermal insulation effect, effectively isolating heat loss while supporting the load of the glass curtain wall 11. Above the portion of the structural floor slab 2 located on the outside of the glass curtain wall 11 is a rigid polyurethane foam insulation board, which can reduce heat loss at the structural floor slab 2. The first backfill layer 5 and the second backfill layer 6 are filled with filling materials with low thermal conductivity, such as aerated concrete blocks or foamed concrete, which have low material density, effectively reducing structural load and providing good thermal insulation effect.

[0033] The building's exterior wall insulation extends to the bottom surface of the structural floor slab 2 and the outer side of the structural edge beam 3. Thanks to the excellent insulation effect of the insulation board 4 and the first exterior wall insulation layer 7, the second exterior wall insulation layer 8 on the outer side of the structural edge beam 3 can be thinned, reducing installation difficulty and facilitating the installation of the exterior facade decoration. The drainage system of the cantilevered corridor is located in the second backfill layer 6, without damaging or affecting the core insulation structure (insulation board 4 and the first exterior wall insulation layer 7).

[0034] Those skilled in the art will recognize that the structural design of the cantilevered corridor of this invention can be extended to other cantilevered platform structures similar to the cantilevered corridor.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cantilevered corridor structure for mitigating thermal bridges, characterized in that, include: Structural floor slab (2), structural edge beam (3), first external wall insulation layer (7), thermal break plate (9), first backfill layer (5), second backfill layer (6), and second external wall insulation layer (8); The inner side of the structural floor slab (2) is fixedly connected to the main structural beam (1) of the building, and the outer side of the structural floor slab (2) is fixedly provided with a structural side beam (3); The bottom surface of the structural floor slab (2) is provided with a first external wall insulation layer (7); a heat insulation plate (9) is provided on the structural floor slab (2); A first backfill layer (5) is provided above the structural floor slab (2) and between the thermal break plate (9) and the main structural beam (1); An insulation board (4) and a second backfill layer (6) are provided above the structural floor slab (2) and between the thermal break plate (9) and the structural edge beam (3); the second backfill layer (6) is provided on the insulation board (4); a glass curtain wall (11) is provided on the thermal break plate (9); A second external wall insulation layer (8) is provided on the outside of the structural side beam (3).

2. The cantilevered corridor structure for weakening thermal bridges according to claim 1, characterized in that, The structural floor slab (2) and structural edge beam (3) are both made of reinforced concrete.

3. The cantilevered corridor structure for weakening thermal bridges according to claim 1, characterized in that, The heat insulation board (9) is made of high-density rigid polyurethane foam.

4. The cantilevered corridor structure for weakening thermal bridges according to claim 3, characterized in that, Metal components (10) are embedded in the first backfill layer (5); the glass curtain wall (11) is fixed to the metal components (10).

5. The cantilevered corridor structure for weakening thermal bridges according to claim 4, characterized in that, The first backfill layer (5) and the second backfill layer (6) are made of aerated concrete blocks or foamed concrete.

6. The cantilevered corridor structure for weakening thermal bridges according to claim 1, characterized in that, The insulation board (4) is made of rigid polyurethane foam.

7. The cantilevered corridor structure for weakening thermal bridges according to claim 1, characterized in that, The second backfill layer (6) is provided with a drainage system (12) on top.

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