阅读说明：本技术 一种高层建筑外墙保温砂浆脱落防治方法 (High-rise building external wall thermal insulation mortar falling prevention method ) 是由 徐亮 寿凡 吴佳 于 2019-10-23 设计创作，主要内容包括：本发明涉及一种高层建筑外墙保温砂浆脱落防治方法,包括如下步骤：步骤一,施工准备,了解空鼓存在的部位及深度,并通过吊篮对外墙空鼓进行详细检查,标注在图纸上；步骤二,空鼓部位的原保温层和涂料层的铲除；步骤三,外墙保温层铲除后的清理及加固；步骤四,修缮材料的选择及施工；步骤五,未空鼓部位修缮,对于没有产生空鼓的部位,由于其黏结强度低,在外墙面增加锚栓进行加强与固定。本发明解决了保温砂浆系统外保温墙面脱落的技术问题。(The invention relates to a high-rise building external wall thermal insulation mortar falling prevention method, which comprises the following steps: firstly, construction preparation is carried out, the position and the depth of the hollowing are known, the hollowing of the outer wall is checked in detail through a hanging basket, and the details are marked on a drawing; step two, removing the original heat insulation layer and the coating layer at the hollowing part; cleaning and reinforcing the stripped heat-insulating layer of the outer wall; selecting and constructing repairing materials; and fifthly, repairing the parts without hollowing, and adding anchor bolts on the outer wall surface for reinforcement and fixation due to low bonding strength of the parts without hollowing. The invention solves the technical problem that the external thermal insulation wall surface of the thermal insulation mortar system falls off.)

1. A high-rise building external wall thermal insulation mortar falling prevention method is characterized by comprising the following steps: firstly, construction preparation is carried out, the position and the depth of the hollowing are known, the hollowing of the outer wall is checked in detail through a hanging basket, and the details are marked on a drawing; step two, removing the original heat insulation layer and the coating layer at the hollowing part; cleaning and reinforcing the stripped heat-insulating layer of the outer wall; selecting and constructing repairing materials; and fifthly, repairing the parts without hollowing, and adding anchor bolts on the outer wall surface for reinforcement and fixation due to low bonding strength of the parts without hollowing.

2. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 1, which is characterized in that: the first step is that for the hollowing part, the hollowing part is chiseled, and then the outer heat insulation system is manufactured again; for the falling part, the interface is removed, and then the external heat preservation system is manufactured again; and for the part without hollowing, the anchor bolt is encrypted for reinforcement.

3. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 1, which is characterized in that: the second step is specifically that the shoveling work is carried out in a blocking and layering way, firstly, the outer vertical face is cut into sections by a cutting machine according to the size of about 500mm multiplied by 500mm, and the sections are deeply cut into the building structure layer of the outer wall face; secondly, shoveling the outer wall coating layer by using a shovel blade with grid cloth as a whole, shoveling the outer wall coating layer by one land, and carrying the outer wall coating layer to a specified garbage stacking point; thirdly, according to the erection of a scaffold or the arrangement condition of a hanging basket, the heat-insulating mortar is shoveled to the surface of the building foundation from top to bottom step by step, and when the heat-insulating mortar layer is chiseled, spraying and an externally-hung dense-mesh green net need to be properly matched, so that the dust pollution generated by construction is reduced.

4. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 1, which is characterized in that: and step three, after the heat-insulating layer falls off or the heat-insulating mortar layer is chiseled off, a loose sand-lime layer is left on the outer wall surface of the heat-insulating mortar layer, the loose surface layer of the base layer is polished and cleaned up by using an electric steel wire brush, and then the base layer is washed by using water.

5. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 4, which is characterized in that: in order to improve the strength of the base layer, a wall surface reinforcing agent needs to be used on the surface of the outer wall base layer before the construction of new thermal insulation mortar.

6. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 1, which is characterized in that: when a new thermal insulation material used for repair is selected, thermal insulation mortar with vitrified micro bubbles as the main component of the inorganic thermal insulation mortar is selected; after the original heat-insulating layer is chiseled and cleaned up, the construction of a new heat-insulating layer is carried out according to the construction process requirements guided by the inorganic heat-insulating mortar factory, and the interface agent between the heat-insulating mortar and the cement mortar plastering layer needs to be in full batch in place, so that the heat-insulating mortar and the cement mortar base layer can be effectively connected.

7. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 6, which is characterized in that: when the thermal insulation mortar is constructed, the service time is controlled, whether watering maintenance is carried out or not is determined according to the climate, and construction is carried out in high-temperature seasons, rainy days or weather below 5 ℃; during construction, the construction is carried out in layers, and the super-thick construction is strictly forbidden.

8. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 1, which is characterized in that: before installing the anchor bolt, polishing and removing the original outer wall putty and the original coating layer to the surface of the grid cloth, and then installing the anchor bolt on the surface of the glass fiber grid cloth; the anchor bolt is used for drilling holes in the base layer for anchoring, and the effective anchoring depth is more than 25mm; when the base wall is a steam aerated concrete product, the effective anchoring depth is more than 50mm; when the base layer is a hollow small building block, a plastic anchor bolt with a back-screwing function is adopted.

9. The method for preventing the falling of the thermal insulation mortar for the external wall of the high-rise building according to claim 8, which is characterized in that: the drilling depth is determined by adopting a drill bit with a corresponding length according to the thickness of the heat insulation layer, the drilling depth is preferably 10-15mm longer than that of the plastic anchor bolt, more than or equal to 160g/m2 of grid cloth is recommended, and the number of the grid cloth is not less than 6/m 2; and (4) restoring the exterior wall coating veneer at the anchor bolt reinforcing position, and sealing the anchor bolt position to prevent water seepage.

Technical Field

The invention belongs to the field of building construction, and particularly relates to a high-rise building external wall thermal insulation mortar falling prevention method.

Background

With the increasing number of high-rise residential construction projects, the requirements for energy conservation and environmental protection are continuously improved, and the building external wall heat insulation technology is also continuously developed and becomes an important building energy conservation technology. The heat-insulating mortar system is widely applied to the building market due to the characteristics of simple construction process, good mortar affinity and the like. However, in the actual application process, the quality accident that the external heat-insulating wall surface of the heat-insulating mortar system falls off due to the defects of the heat-insulating mortar material in the aspects of weather resistance, material cracking and the like also occurs, and the adverse social influence is caused.

In view of the above, the present invention provides a method for preventing and controlling the falling of thermal insulation mortar for an exterior wall of a high-rise building, and the method is produced by the present invention.

Disclosure of Invention

The invention aims to provide a high-rise building external wall thermal insulation mortar falling prevention method, which aims to solve the technical problem of falling of an external thermal insulation wall surface of a thermal insulation mortar system.

In order to achieve the purpose, the invention specifically provides the following technical scheme: a high-rise building external wall thermal insulation mortar falling prevention method comprises the following steps: firstly, construction preparation is carried out, the position and the depth of the hollowing are known, the hollowing of the outer wall is checked in detail through a hanging basket, and the details are marked on a drawing; step two, removing the original heat insulation layer and the coating layer at the hollowing part; cleaning and reinforcing the stripped heat-insulating layer of the outer wall; selecting and constructing repairing materials; and fifthly, repairing the parts without hollowing, and adding anchor bolts on the outer wall surface for reinforcement and fixation due to low bonding strength of the parts without hollowing.

Further, the first step is specifically that for the hollowing part, the hollowing part is chiseled out, and then the outer heat insulation system is manufactured again; for the falling part, the interface is removed, and then the external heat preservation system is manufactured again; and for the part without hollowing, the anchor bolt is encrypted for reinforcement.

Further, the second step is specifically that the shoveling work is carried out in a blocking and layering way, firstly, the outer vertical face is cut into sections by a cutting machine according to the size of about 500mm multiplied by 500mm, and the sections are deeply cut into the building structure layer of the outer wall face; secondly, shoveling the outer wall coating layer by using a shovel blade with grid cloth as a whole, shoveling the outer wall coating layer by one land, and carrying the outer wall coating layer to a specified garbage stacking point; thirdly, according to the erection of a scaffold or the arrangement condition of a hanging basket, the heat-insulating mortar is shoveled to the surface of the building foundation from top to bottom step by step, and when the heat-insulating mortar layer is chiseled, spraying and an externally-hung dense-mesh green net need to be properly matched, so that the dust pollution generated by construction is reduced.

And step three, after the heat-insulating layer falls off or the heat-insulating mortar layer is chiseled off, a loose sand-lime layer is left on the outer wall surface of the heat-insulating mortar layer, the loose surface layer of the base layer is polished and cleaned up by using an electric wire brush, and then the base layer is washed by using water.

Furthermore, in order to improve the strength of the base layer, a wall surface reinforcing agent needs to be used on the surface of the outer wall base layer before the construction of new thermal insulation mortar.

Further, in the fourth step, when a new thermal insulation material used for repair is selected, thermal insulation mortar with vitrified micro bubbles as the main component of the inorganic thermal insulation mortar is selected; after chiseling and cleaning an original heat-insulating layer, constructing a new heat-insulating layer according to the construction process requirements guided by an inorganic heat-insulating mortar factory strictly, wherein an interfacial agent between the heat-insulating mortar and a cement mortar painting layer needs to be in full batch in place, so that the heat-insulating mortar and a cement mortar base layer can be effectively connected;

further, when the thermal insulation mortar is constructed, the service time is controlled, whether watering maintenance is carried out or not is determined according to the climate, and construction is carried out in high-temperature seasons, rainy days or weather below 5 ℃; during construction, the construction is carried out in layers, and the super-thick construction is strictly forbidden.

Further, before installing the anchor bolt, polishing and removing the original outer wall putty and the original coating layer to the surface of the grid cloth, and then installing the anchor bolt on the surface of the glass fiber grid cloth; the anchor bolt is used for drilling holes in the base layer for anchoring, and the effective anchoring depth is more than 25mm; when the base wall is a steam aerated concrete product, the effective anchoring depth is more than 50mm; when the base layer is a hollow small building block, a plastic anchor bolt with a back-screwing function is adopted.

Further, the drilling depth is determined by adopting a drill bit with a corresponding length according to the thickness of the heat insulation layer, the drilling depth is preferably 10-15mm longer than that of the plastic anchor bolt, more than or equal to 160g/m2 of grid cloth is recommended, and not less than 6/m 2 of grid cloth is installed; and (4) restoring the exterior wall coating veneer at the anchor bolt reinforcing position, and sealing the anchor bolt position to prevent water seepage.

The invention has the beneficial effects that: the invention eradicates the original heat-insulating layer and the coating layer at the hollowing part; cleaning and reinforcing the outer wall insulating layer after the removing; selecting and constructing repairing materials; repairing the parts without hollowing, and adding anchor bolts on the outer wall surface for reinforcement and fixation due to low bonding strength of the parts without hollowing, thereby solving the technical problem of falling off of the outer heat-insulating wall surface of the heat-insulating mortar system caused by the defects of weather resistance, material cracking and the like of the heat-insulating mortar material.

Detailed Description

The invention discloses a high-rise building external wall thermal insulation mortar falling prevention method which comprises the following steps: the method comprises the following steps: preparation for construction

(1) And (4) knowing the position and the depth of the hollowing, and carrying out detailed inspection on the hollowing of the outer wall through the hanging basket, wherein the detailed inspection is marked on a drawing.

(2) Because the hollowing is mainly positioned in the heat-insulating layer, and the strength of the heat-insulating material is low. And for the hollowing part, chiseling the hollowing part, and then manufacturing the outer heat insulation system again, for the falling part, removing the interface, and then manufacturing the outer heat insulation system again, and for the part without hollowing, reinforcing the encrypted anchor bolt.

(3) Basically, all the outer walls of the buildings are kept warm and fall off, owners live in or operate the buildings, and air conditioner external units, clothes hangers, external flues and other equipment are arranged at the positions of the air conditioning boards on the outer vertical surfaces and on local outer wall surfaces. Therefore, before the outer vertical surface insulating layer is removed, communication with the owner is needed, the components are firstly dismantled, and the restoration is carried out after the repair construction is finished.

(4) Corresponding greening planting is arranged on the periphery of the house, all the greening planting needs to be removed completely before construction, articles such as colored tape cloth are adopted to cover all the periphery of the building within the influence range, pollution to soil is reduced to the greatest extent, and after the maintenance of the outer vertical face is finished, the soil is cleaned and replaced, and greening recovery work is carried out.

Step two: the method is characterized in that the original heat-insulating layer and the coating layer at the hollowing part are removed, and the first step of maintenance work is to completely remove the hollowing, the cracked original heat-insulating layer and the decorative surface of the coating layer. The shoveling work is carried out in a block and layer mode, (1) the outer vertical face is cut into sections according to the size of 500mm multiplied by 500mm by a cutting machine and is deeply cut to the building structure layer of the outer wall face, (2) the outer wall coating layer is shoveled down to a specified garbage stacking point by a shovel knife by using grid cloth as a whole, and (3) the thermal insulation mortar is shoveled to the building base layer from top to bottom step by step according to the setting condition of a scaffold or a hanging basket, and when the thermal insulation mortar layer is chiseled, measures such as spraying, externally hanging dense mesh green nets and the like need to be properly matched, so that the flying dust pollution generated by construction is reduced.

Step three: cleaning and reinforcing the stripped heat-insulating layer of the outer wall, leaving a loose sand-lime layer on the outer wall surface of the outer wall after the heat-insulating layer falls off or the heat-insulating mortar layer is chiseled off, polishing and cleaning a loose surface layer of a base layer by using an electric steel wire brush, and washing the base layer by using water. In order to improve the strength of the base layer, before the construction of new heat-insulating mortar, a wall surface reinforcing agent is required to be used on the surface of the outer wall base layer, so that the strength of the base layer is properly improved, and meanwhile, the construction quality of the next procedure is ensured.

Step four: the selection and construction of the repairing materials, when selecting the new heat insulation materials used in the repairing, the heat insulation mortar of which the main component of the inorganic heat insulation mortar is vitrified micro bubbles or the heat insulation materials tested after a plurality of project time should be selected as much as possible.

After the original heat-insulating layer is chiseled and cleaned up, the construction of a new heat-insulating layer is carried out according to the construction process requirements guided by the inorganic heat-insulating mortar factory, and particularly, the interface agent between the heat-insulating mortar and the cement mortar painting layer must be fully batched in place to ensure that the heat-insulating mortar and the cement mortar base layer can be effectively connected. When the thermal insulation mortar is constructed, the service time is strictly controlled, whether watering maintenance is carried out or not is determined according to the climate, and construction is carried out in high-temperature seasons, rainy days or weather below 5 ℃. During construction, the net cloth is layered and hung tightly to avoid over thickness and the net cloth is hung tightly to compact the net cloth for one layer of base layer and one layer of top cover

Step five: repairing the parts without hollowing, and adding anchor bolts on the outer wall surface for reinforcement and fixation due to low bonding strength of the parts without hollowing. Before installing the anchor bolt, polishing and removing the original outer wall putty and the coating layer to the surface of the gridding cloth, and then installing the anchor bolt on the surface of the glass fiber gridding cloth. The anchor bolts are drilled in the base layer for anchoring, the effective anchoring depth is more than 25mm, when the base layer wall is a steam aerated concrete product, the effective anchoring depth is more than 50mm, and when the base layer is a small hollow building block, the plastic anchor bolts with the back-screwing function are adopted. The drilling depth is determined by adopting a drill bit with a corresponding length according to the thickness of the heat insulation layer, the drilling depth is preferably 10-15mm longer than that of the plastic anchor bolt, more than or equal to 160g/m2 of grid cloth is recommended, and the number of the grid cloth is not less than 6/m 2. And (4) restoring the exterior wall coating veneer at the anchor bolt reinforcing position, and sealing the anchor bolt position to prevent water seepage.

The construction attention points are that (1) the wall base layer interface is sprayed or blade-coated with full-coating interface mortar, and alkali-resistant coating medium-alkali mesh cloth is paved at the wall joint part consisting of different materials for reinforcement. In order to increase the interface bonding performance of the interface mortar and the inorganic heat-insulating mortar, a roughening process can be adopted, the construction time of the inorganic heat-insulating mortar can be reasonably controlled, and the interface bonding force is improved by fully utilizing a wet-to-wet process.

(2) The leveling layer wall surface is wetted by applying water 12 hours before the heat-insulating mortar construction, so that the heat-insulating mortar is prevented from cracking and the like due to too fast drying and water loss of the wall surface; plastering of the thermal insulation mortar on the wall surface is constructed in a layered manner, the thickness of the first time is controlled within 20mm, and the first time is compacted to ensure that the thermal insulation layer and the base layer are firmly combined, so that the thermal insulation mortar is an effective guarantee measure for ensuring that the thermal insulation mortar is not hollowly, cracked and dropped; after the first-time heat-insulating mortar construction is finished and maintained for 24 hours (depending on the air temperature, the surface is whitish, and the heat-insulating mortar can be prepared for the second time by pressing with fingers basically).

(3) The thickness of the external thermal insulation anti-crack mortar must be ensured in construction, and the situation that the outer thermal insulation system has potential safety quality hazards due to the fact that the bond stress formed by the anti-crack mortar and alkali-resistant coated medium-alkali mesh cloth is low due to insufficient thickness is prevented.

(4) The quality control of the flexible waterproof putty for the outer wall in the inorganic heat-insulating mortar coating facing system is enhanced, the use of common putty for the outer wall is not allowed, and the putty for the inner wall cannot be used externally.

Main characteristics of constituent material of thermal insulation mortar system

1.1 basic structure of external thermal insulation system of thermal insulation mortar external wall

The heat-insulating mortar system is a non-combustible heat-insulating system with heat-insulating, protecting and decorating functions, which is formed by taking heat-insulating mortar as a heat-insulating layer material and assisting an interface layer, an anti-cracking protective layer and a decorative layer. The heat-insulating mortar in the system is a dry-mixed material which is prepared by mixing inorganic light heat-insulating particles as light aggregate, a cementing material, a mineral admixture, a water-retaining thickening material, a water repellent, a fiber reinforcing material and other functional additives in a professional factory according to a certain proportion, and adding water to mix the materials at a use place according to a specified proportion. The mortar is divided into cement-based thermal insulation mortar and gypsum-based thermal insulation mortar according to different cementing materials, wherein the gypsum-based thermal insulation mortar is mainly used in indoor non-humid environments.

1.2 Properties and State of quality of the constituent materials of the System

As a light aggregate thermal insulation mortar, compared with the traditional polyphenyl particles and common expanded perlite, the thermal insulation mortar has the advantages that ① has good fireproof and thermal insulation performance, the fireproof performance reaches A-level standard, ② overcomes the defects of large water absorption and easy pulverization of the traditional material, the material slurry has small contractibility, ③ is convenient to construct, and the process is mature.

1.2.1 thermal mortar

The volume water absorption index in the thermal insulation mortar is not required by related national and industrial standards, but considering that the decorative layer and the anti-cracking protective layer of the thermal insulation mortar are cracked, rainwater can seep into the thermal insulation mortar layer in a large quantity, and the thermal conductivity coefficient of the thermal insulation mortar thermal insulation layer can be obviously increased after water is absorbed, so that the thermal insulation performance is influenced, even the self weight can be increased, and quality accidents such as falling off are caused.

1.2.2 interfacial mortar

Interface mortar is plastered on a cement mortar leveling layer of a wall body base layer, so that the defects of shell formation, hollowing and the like of the thermal insulation mortar are prevented, the cohesive force between the base layer leveling layer and the thermal insulation mortar is improved, and the safety of a thermal insulation mortar system is ensured. At present, the phenomena of hollowing, shelling, falling and the like of a plurality of engineering thermal insulation mortar systems are mainly caused by that the construction of the material is not in place or the material is not closed tightly by a construction unit.

1.2.3 anti-crack mortar

The coating material is mainly used for a plastering material of an anti-cracking protective layer of a cement-based thermal insulation mortar system, and plays a good protective role on a thermal insulation mortar layer. In addition, the waterproof function of the whole thermal insulation mortar system needs to be improved by the waterproof performance of the anti-crack mortar in addition to the waterproof performance of the thermal insulation mortar. In the current market, part of anti-crack mortar is poor in product quality and lacks due flexibility due to low content of doped redispersible latex powder.

1.2.4 alkali-resistant mesh cloth

Considering that the reinforcing mesh cloth is not matched with the anti-cracking mortar after the elongation rate is too large, and cannot play the roles of stress transmission and crack resistance improvement, the requirement of fracture strain is increased. In addition, to the outer wall face fracture phenomenon that many building sites use low grade alkali-resistant screen cloth to cause at present, make clear and definite tensile breaking strength requirement to alkali-resistant screen cloth.

1.2.5 Plastic Anchor bolt

According to investigation and research, most wall surfaces of high-rise houses with hollowing and dropping outer walls are not provided with plastic anchor bolts for reinforcement.

1.2.6 external wall flexible water-proof putty

The flexible waterproof putty for the outer wall mainly has the function of filling and embedding pores of a crack-resistant layer of the wall surface and providing a flat base surface meeting requirements for coating paint. Meanwhile, the flexible waterproof putty for the outer wall has good flexibility and waterproof performance, and is used for eliminating or reducing cracks of the outer wall of a building caused by factors such as climate change and the like.

2 analysis of the reason for the falling of the external thermal insulation wall surface of the thermal insulation mortar

The phenomena of hollowing, shelling, falling and the like of the external thermal insulation wall surface are the main common quality problems of the thermal insulation mortar system, and the large-area popularization and application of the thermal insulation system are always puzzled. Through research on a plurality of projects for solving the problem of the falling quality of the thermal insulation mortar, analysis is carried out after design documents, actual conditions of field construction and consultation of partial expert opinions, and the quality accident of the falling of the external thermal insulation wall is mainly caused by the integration of the following factors.

2.1 weather resistance

Due to the temperature difference between day and night, the periodic hot and cold climatic conditions and the long-term action of ultraviolet radiation, the durability of the external thermal insulation system of the thermal insulation mortar is damaged. In addition, because the thermal insulation mortar has certain thermal insulation performance, the temperature of the anti-cracking protective layer can reach 80 ℃ in summer, and the surface temperature change caused by sudden rainstorm after the summer keeps on sunny days can reach as much as 50 ℃, so that the outer thermal insulation wall surface can be subjected to considerable thermal stress in the actual use process. The difference of the thermal expansion coefficients of the interfaces of the adjacent materials of the external wall thermal insulation mortar system is large, the difference of the elastic moduli is also large, and the interface shear stress is easy to generate large relative deformation along with the change of the temperature difference, so that the external thermal insulation wall surface is easy to fall off.

2.2 bond Strength

Look up energy-conserving heat preservation construction diary and relevant construction technical data, because progress delays earlier stage during the outer heat preservation construction, constructor in order to guarantee to complete the date, so get into the construction of second floor heat preservation mortar promptly after first floor heat preservation mortar construction, the construction interval does not reach more than 24h twice, leads to between first floor heat preservation and the second floor heat preservation cohesiveness not enough, has the hollowing between the two-layer heat preservation. Under the action of wind negative pressure, the shear strength of the heat-insulating layer cannot bear the shear stress generated by the self-weight load of the heat-insulating layer, so that the outer heat-insulating wall surface falls off.

2.3 Water repellency

Due to the reason of the construction period, under the condition that the maintenance time is not about 7d after the construction of the thermal insulation mortar, the construction of the external thermal insulation anti-crack mortar is carried out, so that the bonding strength between the thermal insulation mortar and the anti-crack mortar is poor, and the thermal insulation mortar cracks. Due to the day and night temperature difference and the freeze-thaw cycle in the using process, tiny pores are gradually enlarged, and finally the outer heat-insulating wall is hollow and falls off.

2.4 Effect of wind pressure

The wind pressure of high-rise and super-high buildings in the east China sea, late summer and early autumn of each year, which is faced by Zhejiang, belongs to the technical problem that the wind pressure must be carefully treated when designing the external thermal insulation structure of the external wall of the building.

The actual external thermal insulation system of the external wall is a multilayer composite system and belongs to a structure sensitive to wind load dynamic reaction. The effect of wind load is frequent, duration is long, and the existence of heat preservation cavity makes organic insulation material both sides all have the air, when not taking full adhesion method to construct very much, must make the heat preservation both sides have the atmospheric pressure difference, and this will lead to heat preservation intermittent type nature non-directional motion, positive wind pressure and negative wind pressure promptly. Due to the difference of the thermal deformation and the flexibility of the multilayer material, the crack of the finish coat, the water seepage and the like are easy to occur at the crack, so that the damage of the external environment to the heat insulation system is aggravated. Under the action of strong wind, wind vibration can be generated at the weak part, and the wind vibration can loosen the connection (or bonding) part of the heat-insulating layer and the wall body or damage and aggravate the damage of the heat-insulating material. Raindrops on the outer wall surface act obliquely under wind pressure, so that rainwater can be quickly immersed into the cavity.

3, repairing technical measures for the falling of the external thermal insulation wall surface of the thermal insulation mortar.