Moisture-proof thermal insulation wall structure for office building and construction method of moisture-proof thermal insulation wall structure

Abstract

The invention relates to the technical field of building energy conservation and building construction, and particularly discloses a damp-proof heat preservation wall structure for an office building and a construction method of the damp-proof heat preservation wall structure. The main wall body comprises an overground wall body, a foundation wall body arranged below the overground wall body, a heat preservation layer arranged on the outer side of the overground wall body and a waterproof layer arranged on the outer side of the heat preservation layer. One end of the heat preservation layer extends towards the outer side of the foundation wall to form a downward turning section. The damp-proof heat preservation wall body structure further comprises a water dispersing structure layer arranged in a terrace area on the outer side of the overground wall body. The end, close to the overground wall body, of the water dispersing structure layer is adjacent to the outer side face of the waterproof layer. The water dispersing structure layer comprises a water dispersing surface layer and a capillary fracture layer located below the water dispersing surface layer, and the capillary fracture layer is matched with an external backfill soil layer or an undisturbed soil layer. On the premise that the conventional building construction process is not changed, through structural optimization of the key joints at the bottom of the wall body, the moisture-proof reliability, the heat preservation continuity and the thermal environment adjusting capacity are considered at the same time.

Description

Technical Field

[0001] This invention relates to the field of building energy conservation and building construction technology, and in particular discloses a moisture-proof and heat-insulating wall structure for office buildings and its construction method. Background Technology

[0002] Existing office building exterior walls typically employ a method of attaching insulation boards to the outer side of the main wall and installing a waterproof structure on the outside. However, at the junction of the wall base and the outdoor ground level, only a simple drainage slope or partial waterproof layer is often installed, lacking a systematic barrier to prevent the upward movement of underground moisture and the backflow of surface water. Especially when the backfill or undisturbed soil layer has high moisture content, water can migrate from below the ground level to the bottom of the wall through capillary action. If the lower end of the insulation layer does not form a covering structure extending outwards from the foundation, cold and wet bridge areas can easily form between the outer side of the foundation and the lower part of the wall, leading to problems such as wall dampness, reduced insulation performance, and blistering and peeling of the finishing layer.

[0003] Meanwhile, traditional drainage structures often only emphasize surface drainage slope without incorporating a sealing design at the junction of the waterproof layer and the wall. Rainwater can easily seep in along the gaps between the drainage layer and the wall, thus affecting the wall's durability. Therefore, how to construct a well-defined, layered, and easily constructible moisture-proof and thermal insulation joint system at the base of the wall is a technical problem that urgently needs to be solved by existing technologies. Summary of the Invention

[0004] To overcome the shortcomings and deficiencies of existing technologies, the present invention aims to provide a moisture-proof and heat-insulating wall structure for office buildings and its construction method. This structure optimizes the construction of the junction between the above-ground walls, foundation walls, and outdoor ground level, achieving a comprehensive improvement in the moisture-proof, waterproof, and heat-insulating properties of the wall enclosure system. It is suitable for the moisture-proof and heat-insulating structural design of the exterior envelope of office buildings and similar public buildings.

[0005] To achieve the above objectives, the present invention provides a moisture-proof and heat-insulating wall structure for office buildings, comprising a main wall; the main wall includes a ground wall, a foundation wall disposed below the ground wall, an insulation layer disposed on the outside of the ground wall, and a waterproof layer disposed on the outside of the insulation layer; one end of the insulation layer extends outward toward the foundation wall to form a downturned section; the moisture-proof and heat-insulating wall structure further includes a drainage structure layer disposed in the ground area on the outside of the ground wall, the end of the drainage structure layer near the ground wall being adjacent to the outer side of the waterproof layer; the drainage structure layer includes a drainage surface layer and a capillary fracture layer located below the drainage surface layer, the capillary fracture layer being configured in conjunction with an external backfill soil layer or undisturbed soil layer.

[0006] Furthermore, the apron surface is sloped downwards from the end closest to the ground wall towards the direction away from the ground wall, so that the surface of the apron surface forms a drainage slope.

[0007] Furthermore, the waterproof layer includes a first membrane disposed on the outside of the insulation layer and a second membrane disposed on the outside of the first membrane; the moisture-proof and heat-insulating wall structure also includes a rust-proof metal strip, which is fixed to the outside of the ground wall by external fasteners. The fasteners pass through the rust-proof metal strip, the second membrane, the first membrane and the insulation layer in sequence and are anchored to the ground wall; the fasteners are plastic expansion tubes or metal expansion sleeves.

[0008] Furthermore, the drainage structure layer has an inner edge section on the side closest to the ground wall, and the inner edge section is intersected with the drainage surface layer; a sealant layer is provided between the inner edge section and the outer side of the waterproof layer.

[0009] Furthermore, the capillary fracture layer is a gravel layer or a pebble layer; the moisture-proof and heat-insulating wall structure also includes an inner moisture-proof layer set in the indoor floor structure. The inner moisture-proof layer is located in the subbase or leveling layer of the indoor floor structure, and it is turned up to form an upturned section near the ground wall. The upturned section is set adjacent to the inner side of the ground wall.

[0010] Furthermore, the insulation layer includes multiple insulation substrates made of closed-cell foam material, which are interconnected by a splicing structure; the first membrane is a hydrophobic membrane, and the second membrane is a breathable membrane; multiple first membranes and multiple second membranes are provided, and the waterproof layer is composed of multiple first membranes and multiple second membranes stacked alternately.

[0011] Furthermore, a leveling cavity is provided between the ground wall and the insulation layer, and the leveling cavity is filled with phase change temperature regulating particles; the phase change temperature regulating particles include phase change microcapsules with a core-shell structure, wherein the core is an organic phase change material and the shell is a polymer coating layer or an inorganic coating layer; the particle size of the phase change temperature regulating particles is 1-3 mm; the phase change temperature range of the phase change temperature regulating particles is 15-28℃.

[0012] Furthermore, the above-ground wall and foundation wall are integral reinforced concrete structures. The outside of the above-ground wall is provided with a cement mortar leveling layer, and the insulation layer is set outside the cement mortar leveling layer by an adhesive. The outside of the insulation layer is covered with alkali-resistant fiberglass mesh.

[0013] Furthermore, the leveling cavity is located between the cement mortar leveling layer and the insulation layer.

[0014] Furthermore, the outer surface of the insulation layer is coated with an elastic adhesive layer, and the alkali-resistant fiberglass mesh is pressed into the elastic adhesive layer.

[0015] Furthermore, the corners of the insulation layer are connected by a splicing structure, and the alkali-resistant fiberglass mesh is overlapped at the corners with a pre-set length.

[0016] Furthermore, in the area of ​​door and window openings on the ground wall, the insulation layer is constructed using a whole-board cutting method at the opening, so that the insulation substrate forms a continuous frame structure around the opening, avoiding right-angle seams at the four corners of the opening.

[0017] Furthermore, reinforcing mesh fabric is installed at the four corners of the door and window openings. The reinforcing mesh fabric is laid diagonally to form a 45° oblique reinforcement structure. The reinforcing mesh fabric covers the surface of the insulation layer and is located within the cement mortar leveling layer.

[0018] Furthermore, a folded mesh fabric is installed on the side of the door and window openings and at the junction of the window frame and the insulation layer. The folded mesh fabric is folded from the inside of the opening to the outer surface of the insulation layer and overlapped with the outer alkali-resistant fiberglass mesh fabric, with an overlap width of not less than 100mm.

[0019] Furthermore, the mesh fabric is continuously arranged around the opening, forming a closed covering structure at the top, side, and bottom of the opening to enhance the integrity of the insulation layer around the opening.

[0020] Furthermore, an overlapping layer is formed between the alkali-resistant fiberglass mesh and the wrapped mesh at the opening, and at least two layers of alkali-resistant fiberglass mesh are set in the overlapping area, so that the insulation layer in the opening area forms a local reinforcement zone in terms of structure.

[0021] Furthermore, the outer side of the alkali-resistant fiberglass mesh is coated with an exterior wall paint.

[0022] A construction method for a moisture-proof and heat-insulating wall structure for office buildings includes the following steps: S1, construct the foundation cushion layer on the backfill soil layer or the original soil layer, construct the foundation wall on the foundation cushion layer, and construct the above-ground wall above the foundation wall. S2, an insulation layer is installed on the outside of the wall on the ground, and the lower end of the insulation layer extends outward toward the outside of the foundation wall to form a downward-turned section; the insulation layer is fixed to the outside of the wall on the ground by adhesive bonding or mechanical anchoring. S3, Install a waterproof layer on the outside of the insulation layer; the waterproof layer includes a first membrane and a second membrane, the first membrane is attached to the outside of the insulation layer, and the second membrane covers the outside of the first membrane. S4. Construct a drainage structure layer in the ground area outside the wall on the ground. The drainage structure layer includes a drainage surface layer and a capillary fracture layer located below the drainage surface layer, so that the capillary fracture layer is in contact with the backfill soil layer or the original soil layer.

[0023] Furthermore, the construction method for moisture-proof and heat-insulating wall structures in office buildings also includes the following steps: S5, a sealant layer is filled between the end of the drainage structure layer near the ground wall and the outer side of the waterproof layer; the sealant layer is continuously arranged along the length of the wall, so that a closed sealing interface is formed between the inner edge section of the drainage structure layer and the waterproof layer. Furthermore, before filling the sealant layer, the outer surface of the waterproof layer is cleaned and dried to improve the adhesion stability between the sealant layer and the waterproof layer. S6. A rust-proof metal strip is installed on the outside of the waterproof layer, and the rust-proof metal strip is fixed to the outside of the wall on the ground using fasteners, so that the fasteners pass through the rust-proof metal strip, the waterproof layer and the insulation layer in sequence and are anchored to the wall on the ground.

[0024] Furthermore, the fasteners are arranged at intervals along the length of the wall to form a continuous pressing and fixing structure for the waterproof layer at the bottom of the wall; Furthermore, a linear pressing area is formed between the rust-proof metal strip and the waterproof layer, so that the waterproof layer remains in a close fit at the junction of the lower part of the wall and the drainage structure layer.

[0025] This invention provides a moisture-proof and heat-insulating wall structure for office buildings. It achieves structural coverage of the lower part of the wall and the outer side of the foundation by sequentially setting an insulation layer and a waterproof layer on the outer side of the main wall, with one end of the insulation layer extending outwards towards the foundation wall to form a downward-turned section. Simultaneously, a drainage structure layer is set in the ground area on the outer side of the wall. This drainage structure layer includes a drainage surface layer and a capillary fracture layer below it. The capillary fracture layer is composed of a gravel or pebble layer and is connected to the backfill or undisturbed soil layer, thus forming a structural layer with larger particle size distribution gaps in the lower part of the ground to weaken the continuous upward path of capillary water. An inner edge section is set on the side of the drainage structure layer near the wall, and a sealant layer is set between it and the outer side of the waterproof layer to enhance the sealing effect at the joints. Furthermore, an inner moisture-proof layer is set in the indoor floor structure, forming an upward-turned section near the wall, adjacent to the inner side of the wall, further restricting the upward diffusion of moisture from the indoor side.

[0026] For the fixing method of the waterproof layer, a combination of a first membrane and a second membrane is used to form the waterproof layer, which is then anchored to the ground wall through rust-proof metal strips and fasteners, achieving a reliable connection between the structural layers. For the temperature regulation optimization scheme, a leveling cavity is set between the ground wall and the insulation layer, and the cavity is filled with phase change temperature regulating particles with a core-shell structure. The particle size is 1-3mm, and the phase change temperature range is 15-28℃, to adapt to the commonly used indoor thermal environment range of office buildings.

[0027] The beneficial effects of the present invention are as follows: The present invention improves the moisture-proof reliability of the bottom nodes of the wall by constructing a continuous multi-layer structure system of "insulation down section + vertical waterproof layer + water-drip surface layer + capillary fracture layer + indoor up-dampness-proof layer" at the bottom of the wall. The insulation layer extends outward from the foundation to form a downward section, which helps to reduce the cold bridge area at the bottom of the wall and improve the overall thermal continuity of the external envelope; The granular transition structure between the capillary fracture layer and the backfill layer weakens the continuous channels of capillary water, which helps to reduce the risk of moisture in the wall. The inner moisture-proof layer is installed adjacent to the inner side of the wall, forming a two-way barrier structure that enhances the overall moisture-proof stability. By introducing phase change temperature regulating particles, latent heat can be absorbed or released within the range of indoor temperature fluctuations, thereby improving the thermal inertia of the wall and enhancing the indoor thermal comfort of office buildings.

[0028] Therefore, without changing the conventional building construction process, this invention optimizes the structure of key nodes at the bottom of the wall, taking into account moisture-proof reliability, thermal insulation continuity, and thermal environment regulation capabilities. Attached Figure Description

[0029] Figure 1 This is a partial cross-sectional schematic diagram of the moisture-proof and heat-insulating wall structure of the present invention; Figure 2 for Figure 1 A magnified structural diagram of part A in the middle; Figure 3 This is a schematic diagram of the moisture-proof and heat-insulating wall structure of the present invention after being cut along a horizontal plane; Figure 4 This is a schematic diagram of the structure of multiple thermal insulation substrates spliced ​​at the corner of a wall on the ground according to the present invention; Figure 5 This is a schematic diagram of the structure of the moisture-proof and heat-insulating wall of the present invention when a window is opened; Figure 6 This is a schematic diagram of the window and corner flap treatment of the moisture-proof and heat-insulating wall of the present invention; Figure 7 This is a schematic diagram of the construction method for the moisture-proof and heat-insulating wall structure for office buildings according to the present invention.

[0030] The reference numerals in the figures include: 100. Fasteners; 1. Ground wall; 2. Foundation wall; 3. Insulation layer; 4. Waterproof layer; 5. Drip edge structure layer; 6. Rust-proof metal strip; 7. Leveling cavity; 8. Exterior wall paint; 11. Cement mortar leveling layer; 31. Insulation substrate; 32. Alkali-resistant fiberglass mesh; 33. Reinforcing mesh; 34. Reinforcing mesh; 41. First membrane; 42. Second membrane; 51. Drip edge layer; 52. Capillary fracture layer; 53. Inner edge section; 54. Sealant layer. Detailed Implementation

[0031] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0032] Please see Figures 1 to 7 As shown, in a specific implementation of the present invention, a moisture-proof and heat-insulating wall structure for office buildings, the drainage surface layer 51 is constructed with the side closest to the ground wall 1 as the highest point, gradually decreasing towards the direction away from the ground wall 1 to form a drainage slope. On-site, cast-in-place concrete drainage or mortar drainage can be used. First, the drainage width and outer edge elevation are marked on the leveled base layer. A wall-stopping grout line or template is set along one side of the wall base, and a low-side template is set at the outer edge. The slope of the surface layer is formed by controlling the elevation difference between the templates on both sides (preferably 5% slope in this embodiment). A gap is reserved at the junction of the drainage surface layer 51 and the wall to cooperate with the subsequent sealant layer 54. The edge of the surface layer is made straight to avoid burrs and hollow areas, and to facilitate continuous filling of sealant.

[0033] Compared to existing technologies where the drainage surface layer 51 is flat or has an unstable slope, leading to water seepage, this solution uses a clearly defined drainage slope structure to allow rainwater to drain quickly, reducing the risk of long-term water immersion and seepage at the base of the wall.

[0034] Specifically, the waterproof layer 4 adopts a composite structure of a first membrane 41 and a second membrane 42. The first membrane 41 is a hydrophobic membrane and is directly applied to the outside of the insulation layer 3, while the second membrane 42 is a breathable membrane and covers the outside of the first membrane 41. During construction, the outer surface of the insulation layer 3 is first cleaned and leveled. The first membrane 41 is then laid from bottom to top according to the wall grid, with continuous overlapping between the membranes. The overlapping parts can be sealed with pressure-sensitive tape or hot air welding / bonding to ensure that no through-water channels are formed at the overlapping points. Subsequently, the second membrane 42 is laid, also with continuous overlapping, and its overlapping seams are staggered from the overlapping seams of the first membrane 41 to reduce the probability of through-seales.

[0035] The rust-proof metal strip 6 is horizontally installed along the lower part of the wall. The outer edge of the strip is straight and fits against the surface of the second membrane 42. The fasteners 100 pass through the strip, the second membrane 42, the first membrane 41 and the insulation layer 3 in sequence and are then anchored to the ground wall 1. The arrangement of the fasteners 100 is based on the requirement that the strip can form a uniform compression. On site, plastic expansion tubes or metal expansion sleeves can be used in conjunction with self-tapping screws / bolts (plastic expansion tubes are preferred in this embodiment). Drill holes first, then insert the expansion parts and then tighten them so that the strip forms a linear clamp on the membrane. The membrane is not easy to slip or be blown up by the wind after being subjected to force.

[0036] In terms of working principle, the first membrane 41 plays a major role in water repellency, while the second membrane 42 forms a protective layer on the outside and provides a certain moisture permeability and diffusion channel. The pressure strip and the fastener 100 provide a reliable mechanical bond, avoiding aging and debonding caused by relying solely on adhesive.

[0037] Compared to existing technologies where the waterproof layer relies solely on adhesive at the four ends, which is prone to peeling and forming seepage channels, this solution significantly improves the fixing reliability and durability of the waterproof layer at the four ends through the construction of "composite membrane + mechanical pressing strip".

[0038] In this embodiment, an inner edge segment 53 is provided on the side of the apron structure layer 5 near the ground wall 1. The inner edge segment 53 can be understood as a partial folded edge / vertical edge strip formed upward or inward by the apron surface layer 51, which is used to form a clear interface with the wall waterproofing system. During construction, the apron base layer is leveled first, and then the template or forming strip of the inner edge segment 53 is set according to the wall line so that the edge segment and the apron surface layer 51 intersect each other to form a whole (that is, a continuous component of "horizontal surface layer + wall edge strip" is formed in the same apron structure). After demolding, a groove for injecting sealant is formed between the inner edge segment 53 and the outer side of the waterproof layer 4.

[0039] The sealant layer 54 preferably uses a weather-resistant and water-resistant building sealant. Before construction, the floating dust, oil stains, and damp water film in the joint groove should be treated. If necessary, masking tape should be applied to both sides to control the edge line of the sealant joint. Then, the sealant is continuously injected and compacted and smoothed with a sealant pressing tool so that the sealant can form an effective bond with the inner edge section 53 and the outer surface of the waterproof layer 4 at the same time. The sealant joint should avoid break points and air bubbles, and the corners should be rounded to reduce stress concentration.

[0040] The inner edge segment 53 provides a stable geometric boundary, and the sealant forms a flexible waterstop that can absorb minor deformations between the apron and the wall and maintain a continuous seal. Compared to the problems of cracking and water seepage caused by the "hard-on-hard" interface between the apron and the wall or simple plastering in existing technologies, this solution improves the sealing stability at the wall base by using an edge segment + continuous sealant joint, reducing the probability of rainwater seeping in along the gaps.

[0041] Specifically, in this embodiment, the capillary fracture layer 52 is laid below the drainage surface layer 51 using a crushed stone layer or a pebble layer. The construction process is as follows: after excavating or leveling within the drainage area to the designed base elevation, the backfill soil layer or undisturbed soil layer is first compacted to ensure load-bearing stability; then, crushed stone or pebble material is spread to form the capillary fracture layer 52. During construction, the principle of "forming larger pores between particles and maintaining smooth drainage" is followed to avoid adding too much fine material that would cause the pores to be filled; the drainage surface layer 51 is then constructed above the capillary fracture layer 52, so that it, together with the backfill soil layer or undisturbed soil layer, forms a combination of "lower drainage and upper protection".

[0042] An internal moisture-proof layer is installed on the indoor side. The internal moisture-proof layer is located within the subfloor or leveling layer of the indoor floor structure. During construction, after the indoor subfloor is completed and cleaned, moisture-proof material (such as roll material or coating type moisture-proof layer) is laid. The moisture-proof layer is turned up to form an upturned section near the wall 1 on the ground. The upturned section is closely attached to the inner side of the wall and can be fixed by means of pressure strip, plaster protective layer or adhesive to prevent rebound and falling off. Care should be taken to protect the upturned section from the subsequent indoor surface layer to avoid puncture damage.

[0043] On the outdoor side, a capillary fracture layer 52 cuts off the continuous channel for the capillary rise of moisture, while on the indoor side, an upward-turning moisture-proof layer inhibits the diffusion of moisture from the wall base into the room, forming a coordinated moisture-proof path between the inside and outside. Compared with existing technologies that rely solely on the drainage surface layer 51 for drainage and ignore the problems of capillary rise of underground moisture and indoor dampness, this solution improves the moisture-proof reliability and user comfort of the wall base area through a dual-path control of "capillary fracture + indoor upward-turning moisture-proof".

[0044] Specifically, the insulation layer 3 is composed of multiple insulation substrates 31 made of closed-cell foam material, which are connected to each other through a splicing structure. On-site, tongue and groove, stepped or flat staggered splicing methods can be used. First, the surface of the cement mortar leveling layer 11 is marked with lines to divide the grid. The insulation substrates 31 are laid from bottom to top along the baseline to make the board joints as staggered as possible and avoid forming through vertical joints. The splicing joints are filled with bonding mortar or foam glue to reduce gaps and form convection and water seepage channels.

[0045] The waterproof layer 4 is composed of multiple first membranes 41 (hydrophobic membranes) and multiple second membranes 42 (breathable membranes) stacked alternately. During construction, the first membrane 41 is applied first, followed by the second membrane 42, forming a multi-layer structure. Adjacent membranes are overlapped and compacted, and the edge sealing points correspond to the fixed positions of the pressure strips to prevent wrinkles from appearing at the penetration points of the subsequent fasteners 100, which could lead to local loosening.

[0046] The closed-cell foam substrate has low water absorption and heat insulation properties, and the splicing structure ensures continuous heat insulation; the alternating layered membrane structure can form multiple water-repellent barriers on the outside, and can also provide a certain water vapor release channel through the breathable membrane, reducing the risk of internal condensation.

[0047] Compared to existing technologies where rough joint treatment of insulation boards and single membrane layer lead to water seepage or dampness, this solution improves the overall stability of the external wall insulation and waterproofing system through "31 splicing of insulation substrate + alternating hydrophobic / breathable membrane layers".

[0048] Preferably, in this embodiment, a leveling cavity 7 is provided between the ground wall 1 and the insulation layer 3. The leveling cavity 7 is used to absorb the wall surface flatness error and reserve space for functional filling. During construction, after the cement mortar leveling layer 11 is completed, adhesive tapes with spot or strip bonding can be set according to the local deviation of the wall surface to form a distributed gap between the insulation layer 3 and the base layer as the leveling cavity 7. Alternatively, a stable cavity can be formed by local shims / leveling strips. Then, phase change temperature regulating particles are filled into the cavity. The filling should be carried out in sections to ensure that the particles can be evenly distributed and that there are no obvious voids or pile-up bridges.

[0049] The phase change temperature regulating particles are composed of phase change microcapsules with a core-shell structure: the core is an organic phase change material, and the shell is a polymer coating layer or an inorganic coating layer. In terms of material preparation and selection, common organic phase change materials can be selected as core materials to meet the phase change temperature range of 15-28℃. The coating layer is used to isolate the core material from external moisture, improve durability, and prevent leakage. The particle size is controlled at 1-3mm to facilitate flow and filling in narrow cavities and maintain a certain porosity, so as to balance filling uniformity and heat exchange efficiency.

[0050] When the temperature of the exterior wall fluctuates within the phase change temperature range, the particles act as a temperature-regulating buffer by absorbing / releasing latent heat, thereby improving the thermal inertia of the building envelope; the core-shell structure ensures that the phase change material maintains morphological stability and reduces migration risk during multiple phase change cycles.

[0051] Compared to existing technologies that rely solely on the insulation layer 3 to reduce heat transfer and have limited buffering capacity against indoor temperature fluctuations, this solution enhances the heat regulation capability within the temperature fluctuation range by introducing phase change temperature regulating particles into the leveling cavity 7, while also taking into account the operability of wall leveling and filling construction.

[0052] Specifically, in this embodiment, the ground wall 1 and the foundation wall 2 adopt a reinforced concrete integral molding structure. A cement mortar leveling layer 11 is first made on the outside of the concrete wall. The leveling layer is used to provide a flat base layer and improve the bonding conditions of the adhesive. After the leveling layer hardens, the adhesive is applied or dotted on its outside, the insulation layer 3 is pasted in place, and anchors are used to reinforce it in the required positions.

[0053] The outer side of the insulation layer 3 is covered with alkali-resistant fiberglass mesh 32. During construction, a layer of base adhesive / crack-resistant mortar is first applied to the outer surface of the insulation layer 3. The mesh is then laid and pressed into the wet mortar from top to bottom. It is pressed in and leveled with a trowel so that the mesh is in the middle or on the outer side of the mortar, which is a load-bearing layer. The mesh is overlapped and the overlap is compacted to avoid hollow areas.

[0054] Alkali-resistant fiberglass mesh 32 serves as a reinforcing layer to disperse surface shrinkage stress and thermal stress, improving crack resistance and impact resistance, and providing a stable base layer for subsequent coating finishes. Compared to existing technologies that rely solely on mortar surfaces and are prone to cracking, hollowing, and detachment, this solution improves the overall crack resistance and durability of the external insulation system through a combination of "leveling layer + adhesive insulation layer 3 + mesh reinforcement".

[0055] Specifically, the leveling cavity 7 is set between the cement mortar leveling layer 11 and the insulation layer 3. The specific implementation method can be: the adhesive is arranged on the leveling layer by strip bonding, and the strips form continuous or discontinuous cavity areas; or multiple distributed cavities are formed by spot bonding, and the cavity is filled with phase change temperature regulating particles and then sealed by the insulation substrate 31. The thickness of the leveling cavity is 2-5mm.

[0056] During construction, it is important to avoid applying adhesive to the entire surface, which could cause the cavity to disappear. It is also important to avoid applying adhesive to too small a surface, which could result in insufficient stability of the insulation board. The common practice of "border + several points of adhesion" can be used to balance adhesion and cavity retention.

[0057] Compared to existing technologies that use thicker mortar for leveling, resulting in a large amount of construction work and an increased risk of drying shrinkage and cracking, this solution utilizes the leveling cavity 7 to achieve wall leveling and reuse it as a cavity filling space, making construction more flexible and with a higher degree of functional integration.

[0058] Preferably, in this embodiment, the outer surface of the insulation layer 3 is coated with an elastic adhesive layer, and the alkali-resistant fiberglass mesh 32 is pressed into the elastic adhesive layer. The construction can adopt the process of "two coats of adhesive and one layer of mesh": first, apply a thin coat of elastic adhesive as the base layer, then lay the mesh and press it in with a trowel so that it is not exposed or wrinkled, and then apply another coat of adhesive to cover the mesh and level it to form a continuous elastic protective layer.

[0059] The elastic adhesive material can be a polymer-modified mortar system with a certain degree of flexibility to improve the surface layer's ability to withstand temperature deformation and micro-cracks. Compared with the rigid plaster layer in the prior art, which is sensitive to deformation, prone to cracking and water seepage along the cracks, this solution improves the overall crack resistance and impermeability of the surface layer by combining elastic adhesive with mesh reinforcement.

[0060] In this embodiment, the corners of the insulation layer 3 are connected by a splicing structure, and the alkali-resistant fiberglass mesh 32 is overlapped with a preset length at the corners. During construction, the "interlocking" board arrangement is preferred at the inside and outside corners, that is, the end of the insulation board on one side of the wall extends to the corner, and the insulation board on the other side of the wall overlaps with it, so as to avoid the two boards forming the same straight seam at the corner.

[0061] When laying the mesh fabric, it is not broken at the corner. Instead, the same mesh fabric is continuously folded and laid across the corner, or a mesh fabric is pressed into the adhesive on one side and then folded to the other side to continue pressing, forming a continuous corner wrap. If it is necessary to lay the mesh fabric in sections due to the limitation of the construction surface, sufficient overlap length is reserved at the corner and compacted to ensure the continuous reinforcement of the corner.

[0062] Corners are areas of stress concentration and prone to impact. Staggered paneling reduces the risk of through-joints, while continuous mesh wrapping at the corners disperses stress and improves impact resistance. This solution significantly enhances corner durability through staggered corner joints and overlapping / wrapping of the mesh.

[0063] In this embodiment, the insulation layer 3 in the door and window opening area adopts the whole board cutting construction method: first measure the edge line of the opening at the opening position and lay it out on the insulation base plate 31, use a cutting tool to cut out the outline of the opening on the whole board, and after the whole board is installed, the opening is surrounded by the same or continuous whole board. Right angle seams formed by splicing two boards should be avoided at the four corners of the opening. If the opening size is large and multiple boards need to be combined, the board seams should be far away from the four corners of the opening and staggered arrangement should be adopted to reduce the source of cracks.

[0064] After installation, the edges of the opening are trimmed and polished to make the sidewalls of the opening straight, facilitating the wrapping of the mesh fabric 33 and subsequent window frame finishing. Compared with the existing technology where right-angle joints at the four corners of the opening easily lead to stress concentration and induce radial cracks, this solution significantly reduces the risk of cracking at the opening and improves the integrity of the insulation layer 3 by using whole-panel cutting.

[0065] Preferably, in this embodiment, reinforcing mesh fabric 34 is provided at the four corners of the door and window openings. The reinforcing mesh fabric 34 is laid diagonally to form a 45° oblique reinforcement structure. During construction, a thin layer of adhesive mortar is first applied to the surface of the insulation layer 3 corresponding to the four corners of the opening. Then, the cut reinforcing mesh fabric 34 is pasted and pressed into the adhesive mortar along the diagonal direction of the corner point, so that the reinforcing mesh fabric 34 crosses the area on both sides of the corner point and overlaps with the working layer of alkali-resistant fiberglass mesh fabric 32. Then, adhesive mortar is applied to completely cover it and level it.

[0066] The reinforcing mesh 34 is preferably made of the same material as the alkali-resistant fiberglass mesh 32 to ensure long-term alkali resistance and bonding compatibility. Diagonal tensile stress is easily generated at the four corners of the opening; the reinforcing mesh 34 is arranged diagonally to distribute and transfer the crack propagation path, inhibiting cracks from initiating and propagating from the corners. Compared to existing technologies that only lay large-area mesh and still easily cause diagonal cracks at the corners of the opening, this solution improves the crack resistance of the corners of the opening through 45° reinforcing fabric.

[0067] Preferably, a folded mesh fabric 33 is provided on the side of the door and window opening and at the junction of the window frame and the insulation layer 3. The folded mesh fabric 33 is folded from the inside of the opening to the outer surface of the insulation layer 3 and overlapped with the outer alkali-resistant fiberglass mesh fabric 32. The overlap width is not less than 100mm.

[0068] During construction, first apply adhesive mortar at the junction of the side wall of the opening and the outer wall. Press one end of the folded mesh fabric 33 into the adhesive mortar layer on the side wall of the opening and lay it flat along the edge of the opening. Fold the other end to the outer wall and press it into the adhesive mortar layer on the outer wall, forming an overlap with the large mesh fabric on the outer wall. During the folding process, pay attention to keeping the fold line straight and pressing it firmly at the corner of the opening to avoid bulging and curling. Then lay the large mesh fabric to cover the overlap area of ​​the folded mesh fabric 33 and press it firmly and level it.

[0069] The overlapping mesh fabric 33 is equivalent to adding a "reinforcing edging strip" to the edge of the opening, while connecting the sidewall of the opening to the outer wall as a whole, reducing interface cracking and peeling. Compared with the existing technology, which suffers from weak side opening closures, inadequate mesh fabric leading to edge cracking, water seepage, and loosening of insulation boards, this solution improves the overall stability and crack resistance and seepage prevention capabilities around the opening through overlapping and reinforcement.

[0070] In this embodiment, the mesh fabric 33 is continuously installed around the perimeter of the opening, forming a closed covering structure at the top, side, and bottom of the opening. On-site, the sequence of "first making the vertical wraps on both sides, then the top wrap, and finally the bottom wrap" can be adopted to ensure smooth overlap and reduce exposed ends. If there is a windowsill or drip edge at the bottom, the mesh fabric 33 can be extended into the windowsill plaster layer and reinforced in conjunction with the drip edge treatment to ensure no openings are formed at the edges. Specifically, an overlapping layer is formed between the alkali-resistant fiberglass mesh 32 and the overlay mesh 33 at the opening. At least two layers of mesh are set in the overlapping area to create a localized reinforced area at the opening. During construction, the compaction and mortar fullness of the overlapping area are carefully controlled: first, the overlay mesh 33 is pressed into the mortar, then a large mesh is laid to cover the overlapping area, and the area is repeatedly compacted with a trowel to ensure that the mortar between the two layers of mesh is fully impregnated, avoiding voids between the layers. The outer edge of the overlapping area is smoothly transitioned to prevent the formation of steps that would affect the subsequent finishing.

[0071] The double-layer mesh fabric enhances the tensile and crack resistance redundancy in this area, providing greater resistance to temperature-induced deformation and wind pressure vibration at the opening edge. Compared to existing technologies where the opening area and the main surface are treated with the same reinforcement, resulting in insufficient strength at stress concentration points, this solution improves the crack and peel resistance of key parts of the opening through local double-layer reinforcement.

[0072] Specifically, in this embodiment, the outer side of the alkali-resistant fiberglass mesh 32 is coated with exterior wall paint 8 as the final finishing layer; after the mesh plaster layer has been cured and stabilized, the base layer is inspected and repaired, and local sand holes and burrs are sanded and leveled. Then, the primer is sealed and the topcoat is applied according to the exterior wall paint 8 system; the paint layer, together with the aforementioned waterproof layer 4 and the mesh plaster layer, constitutes the outer protective system, which not only provides weather resistance and stain resistance, but also has a certain degree of shielding and water-blocking effect on minor cracks.

[0073] Compared to existing technologies where coatings are applied directly before a stable reinforcement layer has formed on the substrate, leading to cracking and peeling of the finish, this solution applies the coating on top of the mesh reinforcement and plaster layer, resulting in more reliable adhesion and higher durability of the finish.

[0074] The present invention discloses a construction method for a moisture-proof and heat-insulating wall structure for office buildings. The specific construction process can be organized in the following order: "main structure → heat insulation system → waterproof joints → drainage and capillary fracture → finishing and fixing". During the construction preparation phase, the key points are to verify the relationship between the elevation of the above-ground wall 1, the foundation wall 2 and the outdoor ground level, as well as the positioning line of the downward section of the insulation layer 3; to inspect the base layer on the outside of the above-ground wall 1, remove defects such as honeycomb, sand, and protrusions, and repair and level them. The base layer surface should be clean, free of oil stains and floating dust; at the same time, the compaction of the backfill soil layer or the original soil layer should be checked. If it is backfill soil, it should be compacted in layers until it meets the bearing requirements of the apron and capillary fracture layer 52, and the working surface and drainage slope control benchmark of the construction scope of the apron structure layer 5 should be reserved.

[0075] Specifically, when constructing the foundation pad, foundation wall 2 and ground wall 1 according to step S1, the foundation wall 2 and ground wall 1 adopt the reinforced concrete integral molding process to ensure structural continuity; after the structure is demolded and the construction conditions are met, the exterior wall surface is first made of cement mortar leveling layer 11. The leveling layer aims to eliminate structural surface deviations and provide a continuous bonding base. The straightness of the inside and outside corners is corrected with a straightedge and rounded or squared to meet the subsequent mesh cloth folding and laying conditions; the construction conditions of the interior floor structure are simultaneously embedded or reserved for the construction of the internal moisture-proof layer.

[0076] After the indoor subbase or leveling layer is in place, lay the inner moisture-proof layer and turn it up near the wall 1 on the ground to form an upturned section. The upturned section is set close to the inner side of the wall 1 on the ground. Then, the indoor leveling / surface layer process is carried out to cover and protect it to prevent it from being punctured or trampled on during construction.

[0077] Before installing the insulation layer 3 in step S2, first mark the grid lines, board joint control lines and the start and end lines of the downturn section on the cement mortar leveling layer 11; the insulation layer 3 uses closed-cell foam material insulation substrate 31, and the on-site board arrangement follows the principle of staggered laying, with adjacent board joints staggered to avoid forming through vertical joints; at the inside and outside corners of the wall, the staggered overlapping board arrangement method is adopted, that is, the end of the insulation substrate 31 on one side of the wall extends to the corner position, and the insulation substrate 31 on the other side of the wall interlocks with it in a staggered manner, so that there are no joints at the corner.

[0078] The connection between the insulation layer 3 and the base layer is preferably "adhesive bonding as the main method, with anchoring as a supplement when necessary". The adhesive can be applied in strip bonding or a combination of spot bonding and frame bonding to ensure that the bonding area meets the stability requirements and to reserve space for leveling cavity 7.

[0079] To achieve the downward-turning section structure of the insulation layer 3, the insulation substrate 31 is laid along the downward-turning section line near the outer side of the foundation wall 2, so that the lower end of the insulation layer 3 extends to the outer side of the foundation wall 2 to form a wrapping downward-turning section. When the downward-turning section is attached to the outer side of the foundation wall 2, the outer base layer of the foundation is first cleaned and leveled as necessary, and then the insulation board of the downward-turning section is pressed into place in sequence and reliably connected with the upper insulation layer 3. The joint is aligned with the splicing structure and filled tightly to avoid forming through gaps.

[0080] At the turning point of the downward section, the boards should be aligned straight to avoid hard bending that could cause warping. If there are structural steps or unevenness at the base of the exterior wall on site, the downward section can be formed by local repairs or adjustments to the bonding method without affecting the continuous covering of the downward section.

[0081] When using the phase change temperature regulating particle solution, a leveling cavity 7 is formed between the cement mortar leveling layer 11 and the insulation layer 3. The leveling cavity 7 is formed by strip bonding / dot bonding: adhesive tape or dotted pads are placed on the leveling layer so that the insulation board is bonded and naturally forms a distributed cavity; then the phase change temperature regulating particles are evenly filled into the cavity. The filling process is controlled by "segmented filling, moderate vibration compaction, and avoiding bridging voids" to ensure that the particles can enter the cavities and do not accumulate in a concentrated manner.

[0082] The phase change temperature regulating particles are composed of phase change microcapsules with a core-shell structure. The core is an organic phase change material, and the shell is a polymer coating layer or an inorganic coating layer. The particle size and phase change temperature range are selected according to predetermined parameters to adapt to the temperature fluctuation range of office buildings. After filling, the insulation substrate 31 is pressed into place and necessary positioning corrections are made to ensure that the cavity is effectively sealed and the board surface is flat.

[0083] Specifically, the door and window opening area is implemented according to the process of "whole board cutting + corner reinforcement + overlapping": first, according to the opening size, the insulation base plate 31 is laid out and whole board cutting is carried out so that the opening is surrounded by continuous board material to avoid right-angle joints at the four corners of the opening.

[0084] The edges of the panels at the side walls and corners of the opening are trimmed to make the outline of the opening straight and facilitate subsequent overlaying. Then, reinforcing mesh 34 is laid at the four corners of the opening. The reinforcing mesh 34 is set along the diagonal to form a 45° diagonal reinforcement, pressed into the mortar / crack-resistant mortar and smoothed and covered. Then, overlaying mesh 33 is set at the side of the opening and at the junction of the window frame and the insulation layer 3. The overlaying mesh 33 is flipped from the inside of the opening to the outer wall surface and overlapped with the outer alkali-resistant fiberglass mesh 32. The overlap width is not less than 100mm.

[0085] The mesh fabric 33 is continuously installed around the opening to form a closed cover at the top, side and bottom openings. Finally, the alkali-resistant fiberglass mesh fabric 32 is laid on the large surface of the exterior wall to cover and compact it, so that at least two layers of mesh fabric are overlapped and reinforced at the opening.

[0086] In this embodiment, the alkali-resistant fiberglass mesh 32 on the outside of the insulation layer 3 and the elastic mortar surface layer are implemented according to the process of "bottom mortar - pressing in mesh - surface layer covering": after the insulation board is accepted and the opening is reinforced by wrapping, the elastic mortar is first applied to the board surface to form the bottom layer, and then the alkali-resistant fiberglass mesh 32 is laid and the mesh is pressed in with a trowel so that the mesh is in the mortar layer and the surface is flat and wrinkle-free.

[0087] Adjacent mesh fabrics are laid continuously with overlapping. At corners, the mesh fabric should be continuously folded over to cover the corners or with a reserved overlap length to ensure that the corner reinforcement is not interrupted. Then, apply another layer of elastic adhesive mortar to completely cover the mesh fabric and level and smooth it to form a continuous reinforced plaster layer, providing a stable base for the subsequent waterproof layer 4 and coating layer.

[0088] When constructing the waterproof layer 4 according to step S3, first clean the surface of the plaster layer and ensure it is dry. Then, lay the first membrane 41 and the second membrane 42 from bottom to top: the first membrane 41 is a hydrophobic membrane and is attached to the outside of the insulation layer 3. When laying, the membrane overlaps and is compacted. The overlap seam can be treated by bonding / sealing to form a continuous water-repellent surface. The second membrane 42 is a breathable membrane and covers the outside of the first membrane 41. When laying, it also overlaps and is arranged as far apart as possible from the overlap seam of the first membrane 41.

[0089] When multiple membranes are used in alternating layers, they are laid repeatedly in groups of "first membrane 41-second membrane 42" to form multiple protective interfaces. The membranes are reserved at the base of the wall for fixing with the pressure strip and for use with the waterproof sealant to avoid the ends from being too short and cracking.

[0090] When constructing the drainage structure layer 5 according to step S4, first level and compact the base layer (backfill layer or original soil layer) of the outdoor ground area, and then lay the capillary fracture layer 52. The capillary fracture layer 52 is a crushed stone layer or a pebble layer. The key points of construction control are "keeping the pores between particles open, reducing fine material inclusions, spreading in layers and lightly pressing and leveling", so that it can work with the underlying soil to form a structural layer that weakens the continuous upward path of capillary water.

[0091] After the capillary fracture layer 52 is completed, the drainage surface layer 51 is constructed. The drainage surface layer 51 slopes downward from the end closest to the wall 1 on the ground to form a drainage slope. At the same time, the inner edge section 53 is formed on the side closest to the wall, so that the inner edge section 53 and the drainage surface layer 51 form an intersecting edge strip structure, which forms a stable overlapping interface with the sealant of the waterproof layer 4 later. After the drainage surface layer 51 hardens, the surface and edges are trimmed to ensure that the slope is consistent and the wall base is straight.

[0092] In step S5, fill the gap between the end of the drainage structure layer 5 near the ground wall 1 and the outer side of the waterproof layer 4 with a sealant layer 54: First, clean and dry the contact surface between the outer surface of the waterproof layer 4 and the inner edge section 53. If necessary, perform interface grinding or apply a primer to improve adhesion. Then, continuously inject sealant along the length of the wall and compact and smooth it to ensure that the sealant layer 54 forms a reliable bond with the outer side of the waterproof layer 4 and both sides of the inner edge section 53. Make rounded transitions at corners and cross-sections to avoid stress concentration points.

[0093] After the sealant has cured, it should be properly maintained, avoiding water exposure and external disturbance. Compared to existing technologies where cracks easily form at the junction of the drainage system and the wall, resulting in water seepage, this solution uses a flexible sealant to form a continuous waterstop that can absorb minor deformations and maintain a long-term seal, improving the reliability of the joint seal.

[0094] In step S6, a rust-proof metal strip 6 is installed on the outside of the waterproof layer 4 and fixed with fasteners 100: the rust-proof metal strip 6 is arranged horizontally along the lower part of the wall and forms a linear compression band against the outer surface of the waterproof layer 4. The fasteners 100 pass through the strip, the waterproof layer 4 and the insulation layer 3 in sequence and are anchored to the ground wall 1.

[0095] During construction, first determine the straightness of the pressure strip, drill holes at intervals and install expansion components (plastic expansion tubes or metal expansion sleeves are both acceptable), then tighten the fasteners to 100% until the pressure strip forms a uniform pressure on the membrane, avoiding local over-tightening that shears the membrane or over-loosening that causes bulging; the ends of the pressure strip and the splice should be straightened and overlapped or butted, and if necessary, a sealing / buffering treatment should be added between the pressure strip and the membrane to improve durability.

[0096] After the pressure strip is fixed, check whether the membrane termination is smooth and whether the overlap is compacted to ensure that the waterproof layer 4 at the wall base does not slip or curl due to its own weight or wind load. Compared with the existing technology where the waterproof layer 4 termination relies solely on adhesive, which is prone to aging and detachment leading to leakage, this solution provides reliable mechanical bonding through the pressure strip and fastener 100, making the termination of the waterproof layer 4 stable in the long term and reducing maintenance costs.

[0097] In this embodiment, the final finish and system acceptance are carried out according to the "base layer - reinforcement layer - coating layer - node verification": after the alkali-resistant fiberglass mesh 32 and the elastic mortar surface layer meet the construction conditions, the surface flatness, hollowness and cracks are checked and repaired; when the exterior wall paint 8 is applied, the primer sealing and topcoat film are completed according to the paint system, and the continuity of the coating film is checked in key reinforced parts such as openings, corners and wall bases.

[0098] At the same time, the continuity of key nodes is checked: whether the under-insulation layer 3 is continuous, whether the opening over-wrapping and reinforcing mesh are properly covered, whether the sealant is continuous without breaks, whether the pressure strip is straight, whether the drainage slope meets the drainage direction, and whether the capillary fracture layer 52 is not contaminated by fine materials.

[0099] Compared to existing technologies that only apply surface coatings while neglecting systematic node verification, leading to delayed exposure of potential problems, this solution ensures that the structure's functions can continue to operate after delivery by conducting completion verification of all nodes in the "insulation-waterproofing-moisture-drainage" chain, making the overall durability more controllable.

[0100] This process ensures a logical flow of nodes: continuous insulation, enhanced openings and corners, reliable waterproofing termination, and simultaneous drainage and capillary action at the wall base. This avoids rework and potential problems caused by reversed procedures. Compared to existing technologies where insulation, plastering, waterproofing, and drainage are constructed separately but lack coordination at key points, leading to seepage, cracking, and delamination, this solution improves system synergy, construction controllability, and long-term durability through a construction process organized according to node logic.

[0101] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A moisture-proof and heat-insulating wall structure for office buildings, comprising a main wall; characterized in that: The main wall includes an above-ground wall (1), a foundation wall (2) located below the above-ground wall (1), an insulation layer (3) located on the outside of the above-ground wall (1), and a waterproof layer (4) located on the outside of the insulation layer (3); one end of the insulation layer (3) extends outward to the outside of the foundation wall (2) to form a downturned section; the moisture-proof and heat-insulating wall structure also includes a drainage structure layer (5) located in the ground area outside the above-ground wall (1), the end of the drainage structure layer (5) near the above-ground wall (1) is adjacent to the outer side of the waterproof layer (4); the drainage structure layer (5) includes a drainage surface layer (51) and a capillary fracture layer (52) located below the drainage surface layer (51), the capillary fracture layer (52) is set in conjunction with the external backfill soil layer or the original soil layer.

2. The moisture-proof and heat-insulating wall structure for office buildings according to claim 1, characterized in that: The drainage surface layer (51) is inclined downward from the end near the ground wall (1) to the direction away from the ground wall (1) so that the surface of the drainage surface layer (51) forms a drainage slope.

3. The moisture-proof and heat-insulating wall structure for office buildings according to claim 1, characterized in that: The waterproof layer (4) includes a first membrane (41) disposed on the outside of the insulation layer (3) and a second membrane (42) disposed on the outside of the first membrane (41); the moisture-proof and heat-insulating wall structure also includes a rust-proof metal strip (6), which is fixed to the outside of the ground wall (1) by external fasteners (100). The fasteners (100) pass through the rust-proof metal strip (6), the second membrane (42), the first membrane (41) and the insulation layer (3) in sequence and are anchored to the ground wall (1).

4. The moisture-proof and heat-insulating wall structure for office buildings according to claim 3, characterized in that: The first membrane (41) is a hydrophobic membrane, and the second membrane (42) is a breathable membrane; multiple first membranes (41) and multiple second membranes (42) are provided, and the waterproof layer (4) is composed of multiple first membranes (41) and multiple second membranes (42) stacked alternately.

5. The moisture-proof and heat-insulating wall structure for office buildings according to claim 1, characterized in that: The capillary fracture layer (52) is a gravel layer or a pebble layer; the moisture-proof and heat-insulating wall structure also includes an inner moisture-proof layer set in the indoor floor structure. The inner moisture-proof layer is located in the subbase or leveling layer of the indoor floor structure, and is turned up near the ground wall (1) to form an upturned section. The upturned section is set adjacent to the inner side of the ground wall (1).

6. The moisture-proof and heat-insulating wall structure for office buildings according to claim 1, characterized in that: The drainage structure layer (5) has an inner edge section (53) on the side near the ground wall (1), and the inner edge section (53) and the drainage surface layer (51) are intersected; a sealant layer (54) is provided between the inner edge section (53) and the outer side of the waterproof layer (4).

7. The moisture-proof and heat-insulating wall structure for office buildings according to claim 1, characterized in that: A leveling cavity (7) is provided between the ground wall (1) and the insulation layer (3), and the leveling cavity (7) is filled with phase change temperature regulating particles; the phase change temperature regulating particles include phase change microcapsules with a core-shell structure, the core is an organic phase change material, and the shell is a polymer coating layer or an inorganic coating layer; the particle size of the phase change temperature regulating particles is 1-3 mm; the phase change temperature range of the phase change temperature regulating particles is 15-28℃.

8. The moisture-proof and heat-insulating wall structure for office buildings according to claim 1, characterized in that: The above-ground wall (1) and the foundation wall (2) are integral reinforced concrete structures. The outside of the above-ground wall (1) is provided with a cement mortar leveling layer (11). The insulation layer (3) is set outside the cement mortar leveling layer (11) by an adhesive. The outside of the insulation layer (3) is covered with alkali-resistant fiberglass mesh (32).

9. A construction method for a moisture-proof and heat-insulating wall structure for office buildings, characterized in that, Includes the following steps: S1, construct the foundation cushion layer on the backfill soil layer or the original soil layer, construct the foundation wall (2) on the foundation cushion layer, and construct the ground wall (1) above the foundation wall (2). S2, install an insulation layer (3) on the outside of the ground wall (1), and extend the lower end of the insulation layer (3) to the outside of the foundation wall (2) to form a downward section; S3, Install a waterproof layer (4) on the outside of the insulation layer (3); S4, construct a drainage structure layer (5) on the outer side of the ground surface area of ​​the wall (1) on the ground. The drainage structure layer (5) includes a drainage surface layer (51) and a capillary fracture layer (52) located below the drainage surface layer (51), so that the capillary fracture layer (52) is connected to the backfill soil layer or the original soil layer.

10. The construction method of the moisture-proof and heat-insulating wall structure for office buildings according to claim 9, characterized in that, It also includes the following steps: S5, fill the gap between the end of the drainage structure layer (5) near the ground wall (1) and the outer side of the waterproof layer (4) with a sealant layer (54). S6, a rust-proof metal strip (6) is set on the outside of the waterproof layer (4), and the rust-proof metal strip (6) is fixed on the outside of the ground wall (1) using fasteners (100), so that the fasteners (100) pass through the rust-proof metal strip (6), the waterproof layer (4) and the insulation layer (3) in sequence and are anchored to the ground wall (1).

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