T-shaped joint structure of external wall panel and brick wall and construction method

Abstract

The invention relates to the technical field of building construction, in particular to an external wall panel and brick wall T-shaped connecting joint structure and a construction method.The external wall panel and brick wall T-shaped connecting joint structure comprises a brick wall, an external wall panel and an internal corner and further comprises a flexible connecting layer, and the flexible connecting layer is located at the joint of the brick wall and the external wall panel and comprises a buffer layer; the buffer layer is fixedly mounted on the contact surface of the joint of the brick wall and the external wall panel; the anti-crack layer covers the surface of the internal corner; expansion joints are formed in the surface of the anti-crack layer. A buffer layer is mounted between the brick wall and the external wall panel and is arranged along a T-shaped connecting line of the brick wall and the external wall panel; the buffer layer extends towards the wall bodies on the two sides along the horizontal joint by at least 50 mm, the covering height of the buffer layer at the vertical joint is not smaller than 200 mm, and the buffer layer symmetrically extends along the joint line. The buffer layer symmetrically extends along the T-shaped seam line, the stress buffer area is enlarged, and the situation that micro cracks are generated on the edge of the seam due to stress concentration is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and specifically relates to a T-shaped intersection node structure between an exterior wall panel and a brick wall and a construction method. Background Art

[0002] According to the relative position of the main structure and the infill wall, the connection methods can be divided into two categories: masonry and embedded masonry. Among them, embedded masonry is the masonry of the infill wall within the frame plane, and there are usually two ways to connect it to the main structure:

[0003] (1) Rigid jacking: This connection method significantly increases the rigidity of the structure, which in turn increases the seismic load on the structure. However, the contribution of the infill wall to the seismic resistance of the structure is relatively small. Since the overall rigidity of the steel structure is relatively low and the rigidity difference with the block infill wall is large, the adverse effects of the infill are particularly significant. In areas with seismic fortification intensity of 8 and 9 degrees, this method should be avoided as much as possible.

[0004] (2) Flexible connection: A flexible connection is achieved by setting a gap of not less than 20 mm thick between the infill wall and the structural column or wall, and filling it with polystyrene board and sealing grease. This connection method can effectively reduce the impact of earthquakes on the infill wall and improve its stability.

[0005] When embedding is unavoidable, flexible connection is generally preferred. However, during on-site construction, the node structure formed by the traditional flexible connection method will cause the exterior wall panels and brick walls to shrink due to heat and cold, resulting in cracks and water seepage in the connection nodes, especially when there is a large temperature difference between day and night. Summary of the Invention

[0006] In order to solve the problem that the node structure formed by the existing flexible connection is prone to cracking and water seepage, the present invention provides a T-shaped intersection node structure and construction method of the exterior wall panel and the brick wall to solve the above problems.

[0007] A T-shaped junction structure between an exterior wall panel and a brick wall comprises a brick wall, an exterior wall panel and a concave corner, and includes a flexible connection layer located at the joint between the brick wall and the exterior wall panel. The flexible connection layer includes a buffer layer fixedly mounted on the contact surface at the joint between the brick wall and the exterior wall panel.

[0008] It also includes an anti-cracking layer, which covers the surface of the inner corner; and an expansion joint is arranged on the surface of the anti-cracking layer.

[0009] A buffer layer is installed between the brick wall and the exterior wall panel, and the buffer layer is set along the T-shaped intersection of the brick wall and the exterior wall panel;

[0010] Furthermore, the buffer layer extends at least 50 mm along the horizontal joint to the walls on both sides, the buffer layer covers a height of not less than 200 mm at the vertical joint, and the buffer layer extends symmetrically along the joint line; the buffer layer extends symmetrically along the T-shaped joint line, expanding the stress buffer area and preventing micro cracks from forming at the joint edge due to stress concentration.

[0011] Furthermore, the buffer layer is made of rubber gasket, polyurethane elastomer or corrugated stainless steel belt.

[0012] Furthermore, the buffer layer serves as a core stress-absorbing component and adopts three material options: rubber gasket, polyurethane elastomer or corrugated stainless steel belt;

[0013] Furthermore, when the buffer layer uses rubber gaskets or polyurethane elastomers, the buffer layer is laid along the entire length of the T-joint; rubber gaskets and polyurethane elastomers can effectively absorb the displacement stress caused by temperature changes or earthquakes due to their high elastic modulus, avoiding local cracking caused by rigid contact.

[0014] Furthermore, when using a corrugated stainless steel strip, a positioning post is installed on the contact surface of the brick wall. The corrugated stainless steel strip is matched with a mounting seat during installation. The two ends of the corrugated stainless steel strip are fixedly connected to mounting blocks. The surface of the corrugated stainless steel strip is evenly provided with through holes, the surface of the mounting block is provided with a through groove, and the side surface of the mounting seat is provided with a steel strip mounting groove, and the mounting block extends into the steel strip mounting groove.

[0015] Furthermore, the stainless steel belt is quickly and preliminarily fixed by the positioning column. At the same time, by installing different numbers of steel belts in the steel belt installation groove, it can adapt to different needs. When injecting the foaming agent, the foaming agent can enter the steel belt installation groove and the fixing groove through the connecting groove to further fix the mounting base and the corrugated stainless steel belt. At the same time, part of the foaming agent passes through the through hole to avoid the formation of large valleys in the middle of the gap.

[0016] Furthermore, a fixing groove is provided on the surface of the mounting seat, and the fixing groove passes through the mounting seat. A positioning groove is also provided on the surface of the mounting seat, and the positioning groove vertically passes through the steel belt mounting groove, and also includes a connecting groove, and the connecting groove connects the steel belt mounting groove and the fixing groove.

[0017] Furthermore, the anti-cracking layer includes multiple layers of mesh cloth, which is made of alkali-resistant glass fiber mesh cloth. The mesh cloth is spread all over the exterior wall panels and the brick wall surfaces. The mesh cloth is overlapped at the joints, and the overlap length of the mesh cloth is not less than 200 mm.

[0018] Furthermore, it also includes a galvanized metal grid, which is installed at the inner corner and is fixed by means of anti-cracking mortar.

[0019] Furthermore, the alkali-resistant glass fiber mesh cloth forms a continuous tensile layer through staggered overlap, evenly dispersing the concentrated stress at the internal corner; the galvanized metal mesh further strengthens the shear resistance of the internal corner and further inhibits the expansion of cracks.

[0020] Furthermore, it also includes a waterproof layer, which covers the outside of the anti-cracking layer. The waterproof layer includes a waterproof roll, which covers the outside of the node, and the lap joints of the waterproof roll are sealed with silicone sealant.

[0021] Furthermore, the waterproof membrane is covered on the outside of the anti-cracking layer, and the lap joints are sealed with silicone sealant to form a continuous anti-seepage interface to block external rainwater penetration;

[0022] Furthermore, a water channel is embedded in the bottom of the node to quickly drain the accumulated water, preventing water retention from causing freeze-thaw damage or material aging, and further improving the durability of the node.

[0023] Furthermore, a water channel is embedded in the bottom of the node, and a drainage hole is provided in the water channel.

[0024] Furthermore, the interior of the flexible connection layer is filled with a low-density PU foaming agent, which has both lightness and elasticity, can adapt to dynamic deformation of the joint, and reduce structural loads.

[0025] Furthermore, the surface of the flexible connection layer is covered with a highly elastic silicone sealant, which provides long-term waterproof protection. Its high elongation ensures that the joint remains sealed under repeated deformation.

[0026] Furthermore, a vent hole is provided at the top of the seam to balance the internal air pressure and prevent the sealing layer from swelling or peeling due to temperature changes.

[0027] Furthermore, the expansion joints set on the surface allow the material to expand and contract freely, avoiding the anti-cracking layer itself from cracking due to thermal expansion and contraction. At the same time, silicone sealant is filled in the joints to maintain waterproof integrity.

[0028] A method for constructing a T-shaped junction structure between an exterior wall panel and a brick wall comprises the following steps:

[0029] 1. Preparation before construction: Clean the contact surface between the brick wall and the exterior wall panel to ensure that there is no dust, oil, loose particles and protrusions.

[0030] Check the verticality and flatness of the wall. The deviation must be controlled within ±3mm. Use cement mortar to level the part exceeding the tolerance.

[0031] Moisten the surface of the brick wall to prevent subsequent materials from failing due to excessive water absorption by the base layer.

[0032] 2. Buffer layer installation: Select the buffer layer material according to the engineering environment: Rubber gasket / polyurethane elastomer: In conventional climate zones, use double-sided tape or silicone structural adhesive to stick along the entire length of the T-joint line, press tightly, and align the edges without hollows.

[0033] Corrugated stainless steel strip: Install with the mounting base. Install a suitable number of corrugated stainless steel strips on the surface of the mounting block according to specific needs. Use the bolt fixing groove to fix the mounting base on the contact surface of the exterior wall panel and the brick wall. Pre-install positioning columns on the contact surface of the brick wall. The positioning columns pass through the through grooves and positioning grooves on the surface of the mounting block to fix the corrugated stainless steel strip.

[0034] 3. Install the water channel: Cut a groove in the wall at the bottom of the node and embed a PVC or aluminum alloy water channel. The groove bottom slope should be ≥2% to ensure smooth drainage. Use butyl tape to seal the joint between the water channel and the wall. Reserve a drainage hole in the groove and connect it to a PVC drainage pipe.

[0035] Install an insect-proof mesh cover at the drainage hole outlet to avoid blockage; in cold areas, add an electric heating cable to prevent freezing in winter.

[0036] 4. Flexible Connecting Layer Construction: Fill the gaps between the buffer layers with low-density PU foam, leaving a 5mm depth for surface sealant application. The foam must be evenly distributed and dense, with no voids. After the foam cures, smooth the surface and remove any excess residue. Apply a high-elasticity silicone sealant to the surface, applying it evenly with a dedicated glue gun and then scraping it flat with a scraper to create a continuous waterproof interface. Drill and install air holes at the top of the joint to balance internal air pressure.

[0037] 5. Anti-cracking layer construction: laying of mesh cloth;

[0038] The first layer of mesh cloth is spread over the brick wall and the exterior wall, with an overlap length of ≥200mm, and staggered overlap at the joints, with a staggered distance of ≥100mm.

[0039] The second layer of mesh cloth focuses on covering the corner area, overlapping with the first layer at staggered joints, and the edges of the mesh cloth are embedded in the anti-cracking mortar.

[0040] Install galvanized metal mesh at the inner corners and use anti-cracking mortar to press and fix it. The mesh fits the wall without warping. The thickness of the anti-cracking mortar should be controlled at 3-5mm and applied in two layers:

[0041] After the first coat of mortar has initially set, lay the mesh cloth and press it into the mortar;

[0042] Cover the second coat of mortar with mesh cloth, smooth the surface, and cure for 48 hours, avoiding exposure to sunlight or rain.

[0043] 6. Waterproof layer construction: fully lay waterproof membrane along the outside of the T-shaped node, with a width ≥300mm and a lap seam width ≥100mm. Use hot melt welding or silicone sealant to seal the lap joints.

[0044] An additional layer of butyl tape with a width of 150mm is added at the junction of the water guide channel and the waterproof membrane to strengthen local waterproofing.

[0045] The edges of the waterproof membrane are sealed with highly elastic silicone sealant, which is firmly bonded to the base layer without warping or hollowing.

[0046] 7. Construction of finishing layer: Use polymer modified mortar for caulking treatment, the thickness of the plaster layer is 8-10mm, and it is completed in two times, each time with a thickness of ≤5mm and an interval of ≥4 hours.

[0047] Expansion joints are reserved on the surface of the plaster layer. The width of the joints is 5-8mm and the depth goes through the plaster layer. The joints are filled with silicone sealant.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] 1. Improve the crack resistance and durability of the nodes: By setting up a flexible connection layer and an anti-crack layer, the crack resistance and durability of the nodes are improved. The flexible connection layer uses rubber gaskets, polyurethane elastomers or corrugated stainless steel belts as a buffer layer, which can effectively absorb the displacement stress caused by temperature differences, earthquakes and other factors, and avoid local cracking caused by rigid contact. The anti-crack layer uses alkali-resistant glass fiber mesh cloth with staggered overlaps, combined with galvanized metal mesh at the inner corners to form a continuous tensile layer, evenly dispersing concentrated stress and inhibiting crack expansion. At the same time, the setting of expansion joints allows the material to expand and contract freely, avoiding cracking of the anti-crack layer itself caused by thermal expansion and contraction. This multi-layer collaborative design greatly improves the crack resistance of the node and extends the service life of the structure.

[0050] 2. Enhanced waterproof performance and drainage efficiency: The present invention effectively solves the problem of water seepage in traditional nodes through the combination of a waterproof layer and a water guide trough. The waterproof membrane is covered on the outside of the anti-cracking layer, and the lap joints are sealed with silicone sealant to form a continuous anti-seepage interface to prevent external rainwater from penetrating. A water guide trough is embedded at the bottom of the node, and drainage holes are set in the trough and an external drainage pipe is connected to ensure that the accumulated water is quickly discharged to avoid freeze-thaw damage or material aging caused by water retention. The bottom of the water guide trough is designed with a slope and an insect-proof mesh cover to further ensure smooth drainage and long-term stability. The combination of the waterproof layer and the drainage system significantly improves the waterproof performance and durability of the node, and is suitable for rainy or high-humidity environments.

[0051] 3. Adapt to dynamic deformation and construction convenience:

[0052] The flexible connection layer is filled with low-density PU foam and covered with a highly elastic silicone sealant. Its lightweight and elastic properties allow it to adapt to dynamic joint deformation and reduce structural loads. Air vents are located at the top of the joint to balance internal air pressure and prevent bulging or peeling of the sealant due to temperature fluctuations. The construction method emphasizes layered construction and meticulous attention to detail, such as symmetrical extension of the buffer layer, pre-embedded water channels, and step-by-step application of anti-cracking mortar to ensure high-quality joint construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0054] Figure 1 This is a schematic diagram of a T-shaped junction structure between an exterior wall panel and a brick wall;

[0055] Figure 2 for Figure 1 Enlarged view of part A;

[0056] Figure 3 for Figure 1 Middle BB cross-section;

[0057] Figure 4 This is the structural diagram of the corrugated stainless steel mesh belt;

[0058] Figure 5 This is the structural diagram of the mounting base;

[0059] Figure 6 This is a side view of the mount.

[0060] in:

[0061] 1. Brick wall;

[0062] 2. Exterior wall panels;

[0063] 3. Plaster layer;

[0064] 4. Mesh cloth;

[0065] 5. Galvanized metal grid;

[0066] 6. Gypsum mortar;

[0067] 7. Buffer layer;

[0068] 8. Foaming agent;

[0069] 9. Expansion joints;

[0070] 10. Water channel;

[0071] 11. Mounting seat; 1101. Fixing slot; 1102. Connecting slot; 1103. Positioning slot; 1104. Steel belt mounting slot;

[0072] 12. Corrugated stainless steel strip; 1201. Mounting block; 1202. Through hole;

[0073] 13. Positioning column. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0075] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0076] Example 1

[0077] like Figure 1-2 As shown, a T-shaped junction structure between an exterior wall panel and a brick wall includes a brick wall 1, an exterior wall panel 2, and a recessed corner, including a flexible connection layer located at the joint between the brick wall 1 and the exterior wall panel 2. The flexible connection layer includes a buffer layer 7, which is fixedly mounted on the contact surface at the joint between the brick wall 1 and the exterior wall panel 2.

[0078] It also includes an anti-cracking layer, which covers the surface of the internal corner; an expansion joint 9 is provided on the surface of the anti-cracking layer.

[0079] A buffer layer 7 is installed between the brick wall 1 and the exterior wall panel 2, and the buffer layer 7 is arranged along the T-shaped intersection line between the brick wall 1 and the exterior wall panel 2;

[0080] The buffer layer 7 extends at least 50 mm toward the walls on both sides along the horizontal joint, and the buffer layer 7 covers a height of not less than 200 mm at the vertical joint. The buffer layer 7 extends symmetrically along the joint line; the buffer layer extends symmetrically along the T-shaped joint line, thereby expanding the stress buffering area and preventing microcracks from forming at the joint edge due to stress concentration.

[0081] The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 2 is characterized in that the buffer layer 7 is made of a rubber gasket, a polyurethane elastomer or a corrugated stainless steel belt.

[0082] The buffer layer 7 serves as the core stress absorbing component and is made of three materials: rubber gasket, polyurethane elastomer or corrugated stainless steel strip;

[0083] When the buffer layer 7 is made of rubber gaskets or polyurethane elastomers, the buffer layer 7 is laid along the entire length of the T-joint; rubber gaskets and polyurethane elastomers can effectively absorb the displacement stress caused by temperature changes or earthquakes due to their high elastic modulus, avoiding local cracking caused by rigid contact.

[0084] The corrugated stainless steel strip 12 is equipped with a mounting seat 11 during installation. The two ends of the corrugated stainless steel strip 12 are fixedly connected with mounting blocks 1201. The surface of the corrugated stainless steel strip 12 is evenly provided with through holes 1202. The surface of the mounting block 1201 is provided with a through groove. The side surface of the mounting seat 11 is provided with a steel strip mounting groove 1104. The mounting block 1201 extends into the steel strip mounting groove 1104. The side surface of the mounting block 1201 is connected to at least one corrugated stainless steel strip 12.

[0085] A fixing groove 1101 is provided on the surface of the mounting seat 11, and the fixing groove 1101 passes through the mounting seat 11. A positioning groove 1103 is also provided on the surface of the mounting seat 11, and the positioning groove 1103 vertically passes through the steel belt mounting groove 1104, and also includes a connecting groove 1102, and the connecting groove 1102 connects the steel belt mounting groove 1104 and the fixing groove 1101.

[0086] It provides stable structural support in areas with extreme loads or large temperature differences, while isolating the direct friction between metal and wall through rubber gaskets to reduce the risk of wear.

[0087] The anti-cracking layer includes multiple layers of mesh cloth 4, which is made of alkali-resistant glass fiber mesh cloth. The mesh cloth 4 is spread all over the exterior wall panels and the brick wall surfaces. The mesh cloth 4 is staggered at the joints, and the overlapping length of the mesh cloth 4 is not less than 200 mm.

[0088] It also includes a galvanized metal grid 5, which is installed at the inner corner and is fixed by pressing with anti-cracking mortar.

[0089] The alkali-resistant glass fiber mesh cloth forms a continuous tensile layer through staggered overlap, evenly dispersing the concentrated stress at the internal corners; the galvanized metal mesh further enhances the shear resistance of the internal corners and further inhibits the expansion of cracks.

[0090] Example 2

[0091] like Figure 3 As shown, based on Example 1, it also includes a waterproof layer, which covers the outside of the anti-cracking layer. The waterproof layer includes a waterproof membrane, which covers the outside of the node, and the lap joints of the waterproof membrane are sealed with silicone sealant.

[0092] The waterproof membrane is covered on the outside of the anti-cracking layer, and the lap joints are sealed with silicone sealant to form a continuous anti-seepage interface to prevent external rainwater from penetrating;

[0093] The water channel 10 embedded in the bottom of the node can quickly drain the accumulated water, avoid water retention causing freeze-thaw damage or material aging, and further improve the durability of the node.

[0094] A water channel 10 is pre-buried at the bottom of the node, and a drainage hole is provided in the water channel 10 .

[0095] The flexible connection layer is filled with a low-density PU foaming agent 8, which has both lightness and elasticity, can adapt to the dynamic deformation of the joint, and reduce the structural load.

[0096] The surface of the flexible connection layer is covered with a highly elastic silicone sealant, which provides long-term waterproof protection. The high elongation of the sealant ensures that the joint remains sealed under repeated deformation.

[0097] A vent hole is set at the top of the seam to balance the internal air pressure and prevent the sealing layer from bulging or peeling due to temperature changes.

[0098] The expansion joints set on the surface allow the material to expand and contract freely, avoiding the anti-cracking layer itself from cracking due to thermal expansion and contraction. At the same time, silicone sealant is filled in the joints to maintain waterproof integrity.

[0099] Example 3

[0100] like Figure 1-3 As shown, a T-shaped junction structure between an exterior wall panel and a brick wall includes a brick wall 1, an exterior wall panel 2, and a recessed corner, including a flexible connection layer located at the joint between the brick wall 1 and the exterior wall panel 2. The flexible connection layer includes a buffer layer 7, which is fixedly mounted on the contact surface at the joint between the brick wall 1 and the exterior wall panel 2.

[0101] It also includes an anti-cracking layer, which covers the surface of the internal corner; an expansion joint 9 is provided on the surface of the anti-cracking layer.

[0102] A buffer layer 7 is installed between the brick wall 1 and the exterior wall panel 2, and the buffer layer 7 is arranged along the T-shaped intersection line between the brick wall 1 and the exterior wall panel 2;

[0103] The buffer layer 7 extends at least 50 mm toward the walls on both sides along the horizontal joint, and the buffer layer 7 covers a height of not less than 200 mm at the vertical joint. The buffer layer 7 extends symmetrically along the joint line; the buffer layer extends symmetrically along the T-shaped joint line, thereby expanding the stress buffering area and preventing microcracks from forming at the joint edge due to stress concentration.

[0104] The buffer layer 7 is made of rubber gasket, polyurethane elastomer or corrugated stainless steel belt.

[0105] The buffer layer serves as the core stress-absorbing component and is made of three materials: rubber gasket, polyurethane elastomer, or corrugated stainless steel strip.

[0106] When the buffer layer 7 is made of rubber gaskets or polyurethane elastomers, the buffer layer 7 is laid along the entire length of the T-joint; rubber gaskets and polyurethane elastomers can effectively absorb the displacement stress caused by temperature changes or earthquakes due to their high elastic modulus, avoiding local cracking caused by rigid contact.

[0107] When using a corrugated stainless steel strip 12, a positioning post 13 is installed on the contact surface of the brick wall 1. The corrugated stainless steel strip 12 is matched with the mounting base 11 during installation. The two ends of the corrugated stainless steel strip 12 are fixedly connected to the mounting blocks 1201. The surface of the corrugated stainless steel strip 12 is evenly provided with through holes 1202. The surface of the mounting blocks 1201 is provided with through grooves. The lateral surface of the mounting base 11 is provided with steel strip mounting grooves 1104. The mounting blocks 1201 extend into the steel strip mounting grooves 1104. The lateral surface of the mounting blocks 1201 is connected to at least one corrugated stainless steel strip 12.

[0108] A fixing groove 1101 is provided on the surface of the mounting seat 11, and the fixing groove 1101 passes through the mounting seat 11. A positioning groove 1103 is also provided on the surface of the mounting seat 11, and the positioning groove 1103 vertically passes through the steel belt mounting groove 1104, and also includes a connecting groove 1102, and the connecting groove 1102 connects the steel belt mounting groove 1104 and the fixing groove 1101.

[0109] The anti-cracking layer includes multiple layers of mesh cloth 4, which is made of alkali-resistant glass fiber mesh cloth. The mesh cloth 4 is spread all over the exterior wall panels and the brick wall surfaces. The mesh cloth 4 is staggered at the joints, and the overlapping length of the mesh cloth 4 is not less than 200 mm.

[0110] It also includes a galvanized metal grid 5, which is installed at the inner corner and is fixed by pressing with anti-cracking mortar.

[0111] The alkali-resistant glass fiber mesh cloth forms a continuous tensile layer through staggered overlap, evenly dispersing the concentrated stress at the internal corners; the galvanized metal mesh further enhances the shear resistance of the internal corners and further inhibits the expansion of cracks.

[0112] It also includes a waterproof layer, which covers the outside of the anti-cracking layer. The waterproof layer includes a waterproof roll, which covers the outside of the node. The lap joints of the waterproof roll are sealed with silicone sealant.

[0113] The waterproof membrane is covered on the outside of the anti-cracking layer, and the lap joints are sealed with silicone sealant to form a continuous anti-seepage interface to prevent external rainwater from penetrating;

[0114] The water channel 10 embedded in the bottom of the node can quickly drain the accumulated water, avoid water retention causing freeze-thaw damage or material aging, and further improve the durability of the node.

[0115] A water channel 10 is pre-buried at the bottom of the node, and a drainage hole is provided in the water channel 10 .

[0116] The flexible connection layer is filled with a low-density PU foaming agent 8, which has both lightness and elasticity, can adapt to the dynamic deformation of the joint, and reduce the structural load.

[0117] The surface of the flexible connection layer is covered with a highly elastic silicone sealant, which provides long-term waterproof protection. The high elongation of the sealant ensures that the joint remains sealed under repeated deformation.

[0118] A vent hole is set at the top of the seam to balance the internal air pressure and prevent the sealing layer from bulging or peeling due to temperature changes.

[0119] The expansion joints set on the surface allow the material to expand and contract freely, avoiding the anti-cracking layer itself from cracking due to thermal expansion and contraction. At the same time, silicone sealant is filled in the joints to maintain waterproof integrity.

[0120] A method for constructing a T-shaped junction structure between an exterior wall panel and a brick wall comprises the following steps:

[0121] 1. Preparation before construction: Clean the contact surface between the brick wall 1 and the exterior wall panel 2 to ensure that there is no dust, oil, loose particles and protrusions.

[0122] Check the verticality and flatness of the wall. The deviation must be controlled within ±3mm. Use cement mortar to level the part exceeding the tolerance.

[0123] Moisten the surface of the brick wall to prevent subsequent materials from failing due to excessive water absorption by the base layer.

[0124] 2. Installation of buffer layer 7: Select the buffer layer 77 material according to the project environment: Rubber gasket / polyurethane elastomer: In conventional climate zones, use double-sided tape or silicone structural adhesive to stick along the entire length of the T-joint line, press tightly, and align the edges without hollows.

[0125] Corrugated stainless steel strip: selected for high load or extreme climate zones, installed in conjunction with the mounting base 11. Install a suitable number of corrugated stainless steel strips 1201 on the surface of the mounting block 1201 according to specific needs. Use the bolt fixing groove 1101 to fix the mounting base 11 on the contact surface of the exterior wall panel 2 and the brick wall 1, and pre-install the positioning column 13 on the contact surface of the brick wall 1. The positioning column 13 passes through the through groove on the surface of the mounting block 1201 and the positioning groove 1104 to fix the corrugated stainless steel strip 12.

[0126] The horizontal joint buffer layer 7 extends symmetrically to the walls on both sides by ≥50mm, and the vertical joint extends upward by ≥200mm. The joint intersection adopts 45° bevel to avoid stress concentration.

[0127] 3. Install the water channel 10: Cut a groove in the wall at the bottom of the node and embed a PVC or aluminum alloy water channel. The groove bottom slope should be ≥2% to ensure smooth drainage. Use butyl tape to seal the joint between the water channel 10 and the wall. Reserve drainage holes in the groove and connect them to PVC drainage pipes.

[0128] Install an insect-proof mesh cover at the drainage hole outlet to avoid blockage; in cold areas, add an electric heating cable to prevent freezing in winter.

[0129] 4. Flexible Connecting Layer Construction: Fill the gaps between the buffer layers (7) with low-density PU foam (8), leaving a 5mm depth for surface sealant application. Ensure the foam (8) is evenly distributed and dense, with no voids. After the foam (8) cures, smooth the surface and remove any excess residue. Apply a high-elasticity silicone sealant to the surface, applying it evenly with a dedicated glue gun and then scraping it flat with a scraper to create a continuous waterproof interface. Drill and install air holes at the top of the joint to balance internal air pressure.

[0130] 5. Anti-cracking layer construction: laying of mesh cloth 4;

[0131] The first layer of mesh cloth 4 is spread over the brick wall and the exterior wall, with an overlap length of ≥200mm, and the joints are overlapped with staggered seams, with a staggered distance of ≥100mm.

[0132] The second layer of mesh cloth 4 focuses on covering the inner corner area, overlaps with the first layer at staggered joints, and the edges of the mesh cloth are embedded in the anti-cracking mortar.

[0133] Install galvanized metal mesh 5 at the inner corner and fix it with anti-cracking mortar. The mesh fits the wall without warping. The thickness of the anti-cracking mortar should be controlled at 3-5mm and applied in two layers:

[0134] After the first coat of mortar has initially set, lay the mesh cloth and press it into the mortar;

[0135] Cover the second coat of mortar with mesh cloth 4, smooth the surface, and maintain it for 48 hours, avoiding exposure to sunlight or rain.

[0136] 6. Waterproof layer construction: fully lay waterproof membrane along the outside of the T-shaped node, with a width ≥300mm and a lap seam width ≥100mm. Use hot melt welding or silicone sealant to seal the lap joints.

[0137] An additional layer of butyl tape with a width of 150mm is added at the junction of the water channel 10 and the waterproof membrane to strengthen local waterproofing.

[0138] The edges of the waterproof membrane are sealed with highly elastic silicone sealant, which is firmly bonded to the base layer without warping or hollowing.

[0139] 7. Construction of finishing layer: Use polymer modified mortar for caulking treatment, the thickness of the plaster layer is 8-10mm, and it is completed in two times, each time with a thickness of ≤5mm and an interval of ≥4 hours.

[0140] Expansion joints 9 are reserved on the surface of the plaster layer 3, with a width of 5-8 mm and a depth that penetrates the plaster layer, and the joints are filled with silicone sealant.

[0141] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0142] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A T-shaped junction structure between an exterior wall panel and a brick wall, comprising a brick wall (1), an exterior wall panel (2) and a concave angle, characterized in that: The brick wall (1) and the exterior wall panel (2) are connected via the flexible connection layer, the flexible connection layer comprising a buffer layer (7), and the buffer layer (7) is fixedly mounted on the contact surface at the joint between the brick wall (1) and the exterior wall panel (2); It also includes an anti-cracking layer, which covers the surface of the inner corner; and an expansion joint (9) is provided on the surface of the anti-cracking layer.

2. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 1, characterized in that: A buffer layer (7) is installed between the brick wall (1) and the exterior wall panel (2), and the buffer layer (7) is arranged along the T-shaped intersection line of the brick wall (1) and the exterior wall panel (2). The buffer layer (7) extends along the horizontal joint to the walls on both sides of the water guide groove by a distance of ≥50 mm, and the buffer layer (7) covers a height of ≥200 mm at the vertical joint. The buffer layer (7) extends symmetrically along the joint line.

3. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 2, characterized in that: The buffer layer (7) is made of a rubber gasket, a polyurethane elastomer or a corrugated stainless steel belt (12). When the buffer layer (7) is made of a rubber gasket or a polyurethane elastomer, the buffer layer (7) is laid along the entire length of the T-joint.

4. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 3, characterized in that: When a corrugated stainless steel strip (12) is used, a positioning column (13) is installed on the contact surface of the brick wall (1), and the corrugated stainless steel strip (12) is matched with a mounting seat (11) during installation. The two ends of the corrugated stainless steel strip (12) are fixedly connected with mounting blocks (1201), and the surface of the corrugated stainless steel strip (12) is evenly provided with through holes (1202). The surface of the mounting block (1201) is provided with a through groove. The side surface of the mounting seat (11) is provided with a steel strip mounting groove (1104), and the mounting block (1201) extends into the steel strip mounting groove (1104). The side surface of the mounting block (1201) is connected with at least one piece.

5. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 4, characterized in that: The surface of the mounting seat (11) is provided with a fixing groove (1101), and the fixing groove (1101) passes through the mounting seat (11). The surface of the mounting seat (11) is also provided with a positioning groove (1103), and the positioning groove (1103) vertically passes through the steel belt mounting groove (1104). The mounting seat (11) also includes a connecting groove (1102), and the connecting groove (1102) connects the steel belt mounting groove (1104) and the fixing groove (1101).

6. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 1, characterized in that: The anti-cracking layer comprises multiple layers of mesh cloth (4), wherein the mesh cloth (4) is made of alkali-resistant glass fiber mesh cloth, the mesh cloth (4) is spread over the exterior wallboard and the brick wall surface, the mesh cloth (4) is staggered at the joints, and the overlap length of the mesh cloth (4) is ≥200 mm.

7. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 6, characterized in that: It also includes a galvanized metal grid (5), which is installed at the inner corner and is fixed by pressing with anti-cracking mortar.

8. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 1, characterized in that: The invention also comprises a waterproof layer, the waterproof layer covers the outside of the anti-cracking layer, the waterproof layer comprises a waterproof roll, the waterproof roll covers the outside of the node, the lap joint of the waterproof roll is sealed with silicone sealant, a water guide groove (10) is pre-buried at the bottom of the node, and a drainage hole is provided in the water guide groove (10).

9. The T-shaped junction structure between an exterior wall panel and a brick wall according to claim 1, characterized in that: The flexible connection layer is filled with a low-density PU foaming agent (8), the surface of the flexible connection layer is covered with a high-elasticity silicone sealant, a vent hole is provided at the top of the joint, and the expansion joint (9) is filled with silicone sealant.

10. A method for constructing a T-shaped junction structure between an exterior wall panel and a brick wall, comprising the T-shaped junction structure between an exterior wall panel and a brick wall according to any one of claims 1 to 9, characterized in that: The following steps are involved:

1. Preparation before construction: Clean the contact surface between the exterior wall panel (2) and the brick wall (1) and check the verticality of the wall; 2. Installation of buffer layer (7): When using rubber gasket or polyurethane elastomer, use double-sided tape or silicone structural adhesive to stick the buffer layer to the joint, press tightly, and ensure that the edges are aligned and there are no hollows; When using corrugated stainless steel strips, use L-shaped angle steel to fix the corrugated stainless steel strips at the seams; 3. Install the water guide trough (10): pre-buried the water guide trough (10) at the bottom of the node; 4. Construction of flexible connection layer: fill low-density PU foaming agent (8) between the buffer layers (7), leaving a 5mm depth for sealing, cover the surface with high-elasticity silicone sealant and scrape it flat, drill holes at the top of the joint, and install ventilation holes; 5. Construction of anti-cracking layer: laying mesh cloth (4), the first layer of mesh cloth (4) covers the entire wall surface, overlaps more than 200mm, and overlaps at the joints with staggered joints. The second layer of mesh cloth (4) is laid at the inner corner, overlaps with the first layer with staggered joints, and finally installs galvanized metal mesh (5) at the inner corner and compacts it with anti-cracking mortar.

6. Waterproof layer construction: Cover the outer side of the T-shaped node with waterproof membrane, and seal the joint between the water channel (10) and the waterproof membrane with butyl tape; 7. Construction of the finishing layer: Apply polymer modified mortar to the caulking area to form a plaster layer (3), set expansion joints (9) on the surface, and fill the expansion joints (9) with silicone sealant.

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