1. A self-insulation external wall system is characterized by comprising:

the air-filled structure comprises a plurality of cavity walls which are longitudinally arranged at the positions of frame columns of a main body frame structure, wherein air is filled in cavities of the cavity walls;

a glass curtain wall/window is arranged between every two adjacent empty hopper walls and is parallel to the outer wall;

and the two side surfaces of the hollow hopper wall connected with the glass curtain wall/window are respectively provided with heat insulation slurry.

2. The self-insulating external wall system according to claim 1, wherein the cavity wall is constructed by autoclaved aerated concrete blocks.

3. The self-insulation external wall system according to claim 2, wherein the autoclaved aerated concrete block has a dry density grade of B05, a strength grade of A3.5 and a thermal conductivity of not more than 0.14W/(m.K).

4. The self-insulating external wall system according to claim 2, wherein each layer of the building blocks of the cavity wall are laid and overlapped with each other according to the modulus of the odd-numbered layer and the even-numbered layer.

5. The self-insulating external wall system according to claim 2, wherein the cavity wall is disposed on the outwardly cantilevered structural panels of each layer of the main frame structure.

6. The self-insulating external wall system according to claim 1, wherein the cavity wall comprises a single cavity wall and a multi-cavity wall, and wall ribs are added in the multi-cavity wall.

7. The self-insulating external wall system of claim 6, wherein the length L1 of the single-cavity wall is as follows: l1 is more than or equal to 600 and less than or equal to 1300 mm; the length L2 of the multi-cavity wall is as follows: l2 is more than 1300mm and less than or equal to 3000 mm.

8. The self-insulation external wall system according to claim 1, wherein a group of tie bars are arranged at intervals of 600mm along the longitudinal direction of the cavity wall, and the tie bars are fixedly tied with the frame columns or the additionally arranged constructional columns.

9. The construction method of the self-insulation external wall system as claimed in any one of claims 1 to 8, comprising the following steps:

step 1: cleaning a part of the base layer to be built;

step 2: carrying out masonry positioning on a to-be-built part, and marking the masonry construction range;

and step 3: setting the lacing wire:

determining the bar planting position of the tie bar in the vertical direction of the frame column according to the building block typesetting modulus at the part, needing to build the cavity wall, outside the frame column; additionally arranging a constructional column at the position of the empty hopper wall without the frame column tie, and determining the bar planting position of the tie bar in the vertical direction of the constructional column according to the module number of the block typesetting;

and 4, step 4: building the cavity wall, arranging the tie bars at the positions of the embedded bars determined in the step 3, and fixing the cavity wall and the frame column or the constructional column in a tie mode by using the tie bars;

and 5: and heat-insulating slurry is arranged on two side surfaces of the empty hopper walls, and a glass curtain wall/window is arranged between every two empty hopper walls.

10. The construction method according to claim 9, wherein when the cavity wall is built, the building blocks are bonded with the building blocks by using the building mortar, the upper and lower skin blocks are overlapped in a staggered manner, the overlapping length is not less than 1/3 of the length of the lower layer block, and the minimum overlapping length is not less than 100 mm.

Background

The self-insulation wall body system is mainly used in areas with hot summer and cold winter and areas with hot summer and warm winter, energy-saving self-insulation building block materials and matched special mortar are used for building, and node heat insulation structural measures are used for assisting to realize the self-insulation performance of the outer wall, however, in cold areas, the self-insulation wall body is difficult to realize the energy-saving standard of an outer enclosure structure. Therefore, in cold regions, the thermal insulation performance is usually realized by adding an external thermal insulation mode to the outer wall, and although the method can achieve the thermal insulation performance, certain fire hazard exists. Therefore, how to provide a self-insulation external wall system which can realize self-insulation performance and reduce the combustion risk of a heat insulation layer and a construction method thereof is a technical problem to be solved urgently by technical personnel in the field.

Disclosure of Invention

The invention provides a self-insulation external wall system and a construction method thereof, which aim to solve the technical problems.

In order to solve the technical problem, the invention provides a self-insulation external wall system, which comprises:

the air-filled structure comprises a plurality of cavity walls which are longitudinally arranged at the positions of frame columns of a main body frame structure, wherein air is filled in cavities of the cavity walls;

a glass curtain wall/window is arranged between every two adjacent empty hopper walls and is parallel to the outer wall;

and the two side surfaces of the hollow hopper wall connected with the glass curtain wall/window are respectively provided with heat insulation slurry.

Preferably, the cavity wall is built by autoclaved aerated concrete blocks.

Preferably, the autoclaved aerated concrete block has a dry density grade of B05, a strength grade of A3.5 and a thermal conductivity of not more than 0.14W/(m.K).

Preferably, each layer of building blocks of the cavity wall are mutually overlapped according to the mode combination of odd layers and even layers.

Preferably, the cavity wall is arranged on a structural plate which is cantilevered outwards from each layer of the main body framework structure.

Preferably, the cavity wall comprises a single cavity wall and a multi-cavity wall, and wall ribs are added in the multi-cavity wall.

Preferably, the length L1 of the single-cavity wall is: l1 is more than or equal to 600 and less than or equal to 1300 mm; the length L2 of the multi-cavity wall is as follows: l2 is more than 1300mm and less than or equal to 3000 mm.

Preferably, a group of tie bars are arranged at intervals of 600mm along the longitudinal direction of the cavity wall, and the tie bars are tied and fixed with the frame columns or the additionally arranged constructional columns.

The invention also provides a construction method of the self-insulation external wall system, which comprises the following steps:

step 1: cleaning a part of the base layer to be built;

step 2: carrying out masonry positioning on a to-be-built part, and marking the masonry construction range;

and step 3: setting the lacing wire:

determining the bar planting position of the tie bar in the vertical direction of the frame column according to the building block typesetting modulus at the part, needing to build the cavity wall, outside the frame column; additionally arranging a constructional column at the position of the empty hopper wall without the frame column tie, and determining the bar planting position of the tie bar in the vertical direction of the constructional column according to the module number of the block typesetting;

and 4, step 4: building the cavity wall, arranging the tie bars at the positions of the embedded bars determined in the step 3, and fixing the cavity wall and the frame column or the constructional column in a tie mode by using the tie bars;

and 5: and heat-insulating slurry is arranged on two side surfaces of the empty hopper walls, and a glass curtain wall/window is arranged between every two empty hopper walls.

Preferably, when the cavity wall is built, building mortar is used for bonding the building blocks, the upper and lower blocks are staggered and built, the overlapping length is not less than 1/3 of the length of the lower block, and the minimum overlapping length is not less than 100 mm.

Compared with the prior art, the self-insulation external wall system and the construction method thereof provided by the invention have the following advantages:

1. the invention adopts a building form of a cavity wall structure, the building body is enclosed to form a closed air interlayer, and the heat conduction performance of air is utilized, so that the energy-saving and heat-insulating effects of the frame column part can be improved; the glass curtain wall/window is arranged on the outer side of the frame beam, and the adverse effect of larger heat conductivity coefficient at the frame beam part is reduced by utilizing the heat conductivity of the glass curtain wall/window;

2. the invention can realize the function of one wall with dual purposes of a filler wall and an outer wall heat-insulating layer, saves the cost and avoids the combustion risk of the traditional outer wall heat-insulating layer;

3. the cavity wall can meet the functional requirements of wall masonry and energy-saving heat preservation at one time in the construction of an outer wall enclosure structure, so that the construction period is shortened;

4. the invention provides possibility for the application of the self-heat-insulation wall body in the building envelope of the public building in the cold region.

Drawings

Fig. 1 is a schematic plan structure view of a self-insulating external wall system according to an embodiment of the present invention;

FIG. 2a is a plan view of an odd number of layers of a hollow hopper wall (single chamber) according to an embodiment of the present invention;

FIG. 2b is a plan view of an even number of layers of a hollow hopper wall (single chamber) according to an embodiment of the present invention;

FIG. 3a is a plan view of an odd number of levels of a cavity wall (multi-chamber) according to an embodiment of the present invention;

FIG. 3b is a plan view of an even number of levels of a hollow hopper wall (multi-chamber) according to an embodiment of the present invention;

fig. 4a is a schematic cross-sectional view of a self-insulating external wall system according to an embodiment of the invention;

fig. 4b is a schematic cross-sectional view (window bottom node) of the self-insulating external wall system according to an embodiment of the invention;

fig. 5 is a schematic view illustrating the installation of tie bars according to an embodiment of the present invention.

In the figure: 01-frame column, 02-frame beam, 10-cavity wall, 11-cavity, 12-autoclaved aerated concrete block, 13-wall rib, 14-tie bar, 20-glass curtain wall/window, 30-heat preservation slurry, 40-constructional column, 51-dense plugging and 52-slope-finding dense.

Detailed Description

In order to more thoroughly express the technical scheme of the invention, the following specific examples are listed to demonstrate the technical effect; it is emphasized that these examples are intended to illustrate the invention and are not to be construed as limiting the scope of the invention.

The self-insulation external wall system provided by the invention is arranged outside a main body frame structure consisting of frame columns 01 and frame beams 02 as shown in figure 1, and a filler wall is also used as an external wall insulation layer. The self-insulation external wall system comprises:

the structure comprises a plurality of cavity walls 10 which are longitudinally arranged at the positions of frame columns 01 of a main body frame structure, wherein air is filled in cavities 11 of the cavity walls 10;

a glass curtain wall/window 20 is arranged between every two adjacent empty hopper walls 10, and the glass curtain wall/window 20 is arranged in parallel with the outer wall, namely in parallel with the outer surface of the frame beam 02;

two side surfaces of the cavity wall 10 connected with the glass curtain wall/window 20 are also respectively provided with heat insulation slurry 30.

In the invention, for the part of the frame column 01, a closed space is formed by enclosing the inside of the cavity wall 10, and the energy-saving and heat-insulating effect of the cavity wall 10 at the part of the frame column 01 is improved by utilizing the heat-conducting property of air in the closed space. For the part of the frame beam 02, the glass curtain wall/window 20 is arranged outside the frame beam 02, and the adverse effect of larger heat conductivity coefficient of the part of the frame beam 02 is reduced by utilizing the heat conductivity of the glass curtain wall/window 20. The thermal insulation slurry 30 is arranged between the hollow hopper wall 10 and the glass curtain wall/window 20, so that the thermal insulation effect of the outer wall system is further improved.

Preferably, the cavity wall 10 is built by autoclaved aerated concrete blocks 12. The autoclaved aerated concrete block 12 is light in weight, moderate in strength and good in heat preservation effect, and specifically, in the embodiment, the autoclaved aerated concrete block 12 has a dry density grade of B05, a strength grade of A3.5 and a heat conductivity coefficient of not more than 0.14W/(m.K). The autoclaved aerated concrete block 12 has the characteristics of good heat preservation and non-combustion, and can be used as an outer wall filler wall and an outer wall heat preservation layer simultaneously, so that the function of one wall with two purposes is realized, namely, a self-heat preservation outer wall enclosure structure with the outer wall heat preservation layer is not required to be additionally arranged; and meanwhile, the possibility of burning of the heat-insulating layer of the outer wall of the building is greatly reduced.

Preferably, please refer to fig. 2a and 2b, wherein each layer of the building blocks of the cavity wall 10 are laid and overlapped according to the modulus of the odd layer and the even layer, so as to ensure that no vertical through seam exists in the wall body, thereby ensuring the integrity of the wall body.

Preferably, referring to fig. 3a and 3b with emphasis on the hollow hopper wall 10, the hollow hopper wall includes a single-cavity hollow hopper wall and a multi-cavity hollow hopper wall, and the length of the single-cavity hollow hopper wall and the multi-cavity hollow hopper wall can be selected according to the length of the hollow hopper wall 10. Specifically, with continued reference to fig. 2a and 3a, the length L1 of the single-chamber cavity wall is: l1 is more than or equal to 600mm and less than or equal to 1300mm, and L1 is also more than the width of each of the two sides of the frame column 01 and is 200 mm; the length L2 of the multi-cavity wall is as follows: l2 is more than 1300mm and less than or equal to 3000 mm. Preferably, wall ribs 13 can be additionally arranged in the multi-cavity empty hopper wall to increase the overall stability of the wall.

Preferably, referring to fig. 4a, the cavity wall 10 is disposed on the structural plate of each layer of the main frame structure that is cantilevered outwards. The autoclaved aerated concrete block 12 is sequentially provided with a special waterproof interface agent with the thickness of 2-3 mm, a leveling layer and a decorative layer outwards, so that the waterproof effect and the attractiveness of the outer wall are ensured. And a dense plug 51 made of heat insulation slurry is required to be added on the outer vertical surface of the joint of the autoclaved aerated concrete block 12 and the frame beam 02. Referring to fig. 4b, at the lower opening node of the window, a slope-finding compact 52 made of thermal insulation slurry should be added at the windowsill. Further ensuring the waterproof effect and the aesthetic degree of the outer wall.

Preferably, please refer to fig. 5, a set of tie bars 14 is disposed at intervals of 600mm along the longitudinal direction of the cavity wall 10, and the tie bars 14 are tied and fixed with the frame columns 01 or the additional constructional columns 40. Preferably, each set of tie bars 14 comprises 2 tie bars 14 of 6mm diameter and are effectively tied and secured to the frame posts 01 or the added construction posts 40. Specifically, at the portion where the frameless column 01 is to be pulled, the structural column 40 needs to be added to the frame beam 02, the cross-sectional dimension of the added structural column 40 is 200 × 200mm, and C20 concrete is poured. The construction post 40 is placed on the cantilever plate with the outside flush with the cavity wall 10. The steel reinforcement used to construct the column 40 is typically 4 bars of 12mm diameter (HRB400) and the stirrups are typically 6mm diameter (HPB235) spaced 250mm apart.

The heat transfer coefficient of the self-insulation external wall system provided by the application is calculated according to the three groups of external wall structures. And respectively calculating heat transfer coefficients according to the difference between the main body part and the local structure of the self-insulation external wall system. In view of the fact that the heat conductivity coefficient of air is 0.023W/(m.k) in a closed state, a considerable thermal resistance value can be provided, and therefore the air interlayer in the self-insulation external wall system can well improve the energy-saving and heat-insulation effect of the whole external wall enclosure structure. However, because the understanding of the air closed state conditions is different, the heat transfer coefficient calculation is not added to the air interlayer heat resistance for the moment, so that the heat transfer coefficient calculation result of the structure of the main body part of the self-insulation external wall system is prevented from being influenced.

The outer wall is constructed in a first mode. The structure of the empty bucket wall at the main body part: 200mm thick brickwork + air interlayer +100mm thick brickwork.

And constructing a second outer wall. The part is empty to fight the wall and adds the constructional column position: 200mm thick brickwork + air interlayer +200mm thick constructional column.

And constructing a third outer wall. The wall rib part of the local empty wall: masonry 500mm thick.

According to the calculation results, the heat transfer coefficient of the main body part structure of the self-insulation external wall system is 0.407W/square meter K, and the correction coefficient of the heat transfer coefficient of the main body part of the self-insulation external wall system in the cold region is 1.25. The heat transfer coefficient of the self-insulation external wall system after considering a linear heat bridge is 0.407 multiplied by 1.25 ═ 0.509W/square meter K. Therefore, under the condition that the thermal resistance of the air interlayer in the self-insulation external wall system is not added for calculation, the main body part structure of the self-insulation external wall system can meet the basic requirement that the heat transfer coefficient of the external wall of the public building enclosure in cold regions is less than or equal to 0.60W/(. square meter.K). Therefore, the self-insulation external wall system can meet the functional requirements of wall masonry and energy-saving heat preservation in one step and save the construction period in the construction of the external wall enclosure structure. And moreover, the application of the self-insulation external wall system in the public building envelope in cold regions is possible.

The invention also provides a construction method of the self-insulation external wall system, which comprises the following steps:

step 1: cleaning a part of the base layer to be built;

specifically, the positions to be built need to be cleaned by a broom, so that the floor base layer is ensured to be free of impurities and floating dust.

Step 2: carrying out masonry positioning on a to-be-built part, and marking the masonry construction range;

specifically, after the floor base is cleaned, masonry positioning is carried out on the to-be-built part. After measurement and positioning, a datum line is popped up on the floor base layer, and the masonry construction range is marked.

And step 3: the tie bar 14 is provided with:

determining the bar planting position of the tie bar 14 in the vertical direction of the frame column 01 according to the building block typesetting modulus at the position, needing to build the cavity wall 10, on the outer side of the frame column 01; additionally arranging a constructional column 40 at the position of the empty hopper wall 10 without the tie of the frame column 01, and determining the bar planting position of the tie bar 14 in the vertical direction of the constructional column 40 according to the building block typesetting modulus;

specifically, the constructional column 40 has a cross-sectional dimension of 200 × 200mm, and is cast with C20 concrete. The steel bars used to construct the columns 40 are typically 4 steel bars of 12mm diameter (HRB400) and the stirrups are typically 6mm diameter (HPB235) steel bars spaced 250mm apart. After the constructional column 40 is poured, the steel bar planting position of the tie bar 14 in the vertical direction of the constructional column 40 is determined according to the building block typesetting modulus, and the steel bar planting requirement is the same as that of the frame column 01.

Specifically, the tie bar 14 can use 2 diameter 6mm reinforcing bars (HPB235), set up along the 01 direction of height vertical interval 600mm of frame post, and the tie bar 14 is the annular setting in the plane through ligature or welded mode. The tie bars 14 can be embedded into the frame columns 01 or the construction columns 40 by using a bar planting method. The embedded steel bars are anchored into structures such as the frame column 01, the shear wall constructional column 40 and the like for 10d (d is the diameter of the steel bars), and the diameter is not less than 100 mm.

When the bar planting drilling, avoid former structure reinforcing bar as far as possible, drilling diameter is 4mm than bar planting reinforcing bar diameter is big usually. If the main rib of the original structure is encountered, the position of the drilling hole can be properly adjusted to avoid, but the deviation is not suitable to be too large. The drilling depth is generally 10d and not less than 100 mm. And testing the hole depth in time after the drilling is finished, and meeting the design requirement. After the hole depth verification is completed, the dust in the holes is blown clean by an air pump, and then the holes are cleaned and moistened by dipping the cotton fibers in water, so that the bonding quality is ensured. After the hole cleaning is finished, the hole is temporarily blocked by plastic immediately so as to prevent dust and foreign matters from falling.

When the steel bar is planted, the glue injection gun nozzle is inserted into the hole, glue is slowly injected into the hole, the glue injection amount is based on that the glue is filled and overflowed after the steel bar is inserted into the hole, and the glue injection is required to be completed once. When the reinforcing steel bar is inserted into the hole, the reinforcing steel bar needs to slowly rotate towards the same direction while entering until the bottom of the hole, and at the moment, the adhesive cement should overflow from the hole. The implanted rebar should be protected from rocking and collision during glue curing. And (5) naturally curing at normal temperature.

And 4, step 4: building the cavity wall 10, arranging the tie bars 14 at the positions of the embedded bars determined in the step 3, and fixing the cavity wall 10 and the frame columns 01 or the constructional columns 40 by using the tie bars 14 to keep the wall stable;

specifically, a block arranging trial pendulum is designed before masonry, the blocks are arranged according to the length of a wall, part of the blocks need to be cut, a cutting line is firstly cut on the blocks by a ruler during cutting, then the blocks are cut by a table type cutting machine according to the cutting line, a cutting operation dustproof shed is required to be arranged, and the non-standard blocks after cutting the blocks are not smaller than 1/3 of the length of the blocks.

The base layer of the cavity wall is kept flat before building. If the base layer is not flat, 1:3 cement mortar can be selected for leveling, the thickness is generally controlled to be 10-45 mm, and the level and the verticality of the block wall are controlled through the thickness. Then the special masonry mortar is used for masonry. The masonry can be constructed from the rebar planting portion of the tie bars 14 or the structural columns 40 to both ends.

The tie bars 14 are connected with the frame columns 01 or the constructional columns 40 in a post-bar planting mode, and the bar planting anchors the bar planting into the frame columns 01 or the shear walls and other structures for 10 days, which is not less than 100 mm. The tie bars 14 of the filler wall are connected by binding and overlapping, and the overlapping length is 55d and is not less than 400 mm.

And 5: thermal insulation slurry 30 is arranged on two side surfaces of the cavity walls 10, and glass curtain walls/windows 20 are arranged between every two cavity walls 10.

Preferably, when the cavity wall 10 is built, building mortar is used for bonding the building blocks, the upper and lower blocks are staggered and built, the overlapping length is not less than 1/3 of the length of the lower block, and the minimum overlapping length is not less than 100 mm.

Specifically, the adhesive is firstly put with water in a barrel according to the water-cement ratio before stirring, then is uniformly sprayed into adhesive dry powder, is fully and uniformly stirred by an electric tool, and after the stirring of the adhesive is finished, the adhesive is used within 4 hours, products exceeding the quality guarantee period are strictly forbidden to be used, and the adhesive strength of the adhesive is ensured under the conditions that the stirring is finished for more than 4 hours, and then water is added for stirring.

Before the adhesive is coated, a brush is used for cleaning dust on an adhesive surface, so that firm adhesion of the adhesive is ensured. When the adhesive is coated, the special spoon is used for uniformly spreading the special masonry mortar on the surface of the lower-skin building block, so that the mortar filling degree of masonry mortar joints can be ensured, the construction loss of the adhesive can be reduced, and the masonry speed can be increased.

When the mortar is built, the vertical mortar joints can be laid on the end faces of the building blocks firstly, the building blocks are tapped by a rubber hammer after being put on a wall, the tapping of the rubber hammer needs to be carried out inwards from the tops of the building blocks firstly, then, the mortar is compacted in the horizontal direction, the mortar can overflow from the mortar joints, the overflowed mortar can be cleaned in time, and meanwhile, gaps cannot be left in the mortar joints.

Masonry corners and junctions should be built at the same time. For those which can not be built at the same time, they must be left at the temporary broken position and built into oblique branches. The racking level projection length should not be less than 2/3 in height. When the branches are connected, the branches are cleaned firstly, and then the bonding materials are paved for connecting and building.

And after the infilled wall is built and at least 7d are required to be arranged, the joints of the infilled wall are compacted by using dry and hard concrete after the wall is deformed.

By adopting the method, the self-insulation external wall system can meet the functional requirements of wall building and energy-saving heat preservation in one step in the construction of an external wall enclosure structure, and the construction period is shortened.

In summary, the self-insulation external wall system and the construction method thereof provided by the invention comprise: the structure comprises a plurality of cavity walls 10 which are longitudinally arranged at the positions of frame columns 01 of a main body frame structure, wherein air is filled in cavities 11 of the cavity walls 10; a glass curtain wall/window 20 is arranged between every two adjacent empty hopper walls 10, and the glass curtain wall/window 20 is arranged in parallel with the outer wall; two side surfaces of the cavity wall 10 connected with the glass curtain wall/window 20 are also respectively provided with heat insulation slurry 30. The invention adopts a building form of a cavity wall structure, the building body is enclosed to form a closed air interlayer, and the heat conduction performance of air is utilized, so that the energy-saving and heat-insulating effect of the 01 part of the frame column can be improved; the glass curtain wall/window 20 is arranged on the outer side of the frame beam, and the adverse effect of large heat conductivity coefficient of the frame beam 02 part is reduced by utilizing the heat conductivity of the glass curtain wall/window 20. The invention can realize the function of one wall with a filling wall serving as an outer wall heat-insulating layer, saves the cost and avoids the combustion risk of the traditional outer wall heat-insulating layer.

It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.