Low parapet wall roof waterproof structure and construction method

Abstract

The invention discloses a low parapet wall roof waterproof structure and method.The structure comprises a parapet wall and roof panel integrated pouring assembly, a roof multifunctional structure layer, a low parapet wall handrail assembly, a low parapet wall heat preservation structure layer and an additional waterproof assembly, and the low parapet wall and roof panel integrated pouring assembly comprises embedded vertical ribs; the pre-embedded vertical ribs are fixed with main ribs in a roof structural plate and are connected with steel bar supports, and graphite plate embedded blocks sleeve the upper parts of the pre-embedded vertical ribs; the roof multifunctional structure layer comprises a first waterproof layer, a roof heat preservation layer, a slope making layer, a second waterproof layer, an isolation layer and a waterproof protection layer which are laid on a roof structure plate from bottom to top, and the first waterproof layer and the second waterproof layer are both turned upwards and extend to the edge of the top face of the low parapet wall. The low parapet wall handrail assembly comprises a wall top stainless steel buried plate, a handrail is welded to the wall top stainless steel buried plate, and a handrail vertical rod is sleeved with a height-adjustable U-shaped closing-up buckle. According to the structure, structural waterproofing can be achieved, cooperative waterproofing with an external composite waterproof system is achieved, and the waterproof performance of the wall surface is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building structure waterproofing, and more specifically, relates to a low parapet roof waterproofing structure and a construction method. Background Art

[0002] In the construction industry, roof waterproofing is a critical step in ensuring a building's durability and functionality. Low parapet roofs are a common architectural form, widely used in various types of buildings. As low walls surrounding a building's roof, parapets not only ensure the safety of maintenance personnel, but also play a key role in preventing water seepage from the waterproofing layer, preventing rainwater from overflowing from the roof, and decorating the building's facade. Any waterproofing defects can lead to rainwater leakage, which in turn can affect the building's internal environment and structural safety. Therefore, the design and construction of the waterproofing structure of parapet roofs are particularly important.

[0003] In the prior art, such as the patent document with application number CN202310641162.2, the invention discloses a parapet waterproof structure that prevents cracking, including a parapet body arranged on the top of the roof, a waterproof membrane is laid between the parapet body and the top of the roof, a first waterproof layer is provided on the outside of the waterproof membrane, a protective layer is provided on the outside of the first waterproof layer, and an anti-cracking net is sandwiched on the inside of the protective layer; a positioning groove is provided on one side of the parapet close to the waterproof membrane, the positioning groove is arranged horizontally, and at least one group is provided in the vertical direction; a positioning component for fixing the protective net is provided in the positioning groove. By adopting the above-mentioned technical solution, the problem of cracking and delamination on the outside of the parapet can be reduced, and at the same time, the integrity and waterproofness of the parapet can be improved; for example, the patent document with application number CN202120740425.1 discloses a roof parapet waterproof structure, including a water guide device, a sealing material, a fixing part and a roof waterproof layer. The roof waterproof layer is laid on the roof and extends upward to the parapet. The end of the roof waterproof layer is sealed and fixed by a fixing part and a sealing material; the water guide device is arranged in the parapet, and one end of the water guide device extends out of the parapet and covers the end of the roof waterproof layer. The roof parapet waterproof structure involved in the utility model can make rainwater flow out along the water guide device, and even if the roof waterproof layer has a mouth or the sealing paste cracks, the rainwater flowing along the parapet will be led away, and the rainwater will not penetrate into the interior of the waterproof layer through the waterproof layer head, thereby ensuring the safety of the roof waterproof layer, and can effectively solve the problem of roof parapet waterproof leakage, ensure that the leakage hidden danger of the roof waterproof layer is eliminated, and ensure the normal use of the building. The prevention and control method adopted is economical, highly operational and highly reliable.

[0004] However, existing low parapet roofs typically have the parapet lower than the finished roof surface. This makes it easy for accumulated snow to slide directly off the roof during rainy or snowy weather. The parapet is often cast separately from the roof decking, forming a separate, integrated structure. The construction joint between the parapet and the roof can create leakage risks. Low parapet roofs typically lack internal eaves, making waterproofing difficult. Furthermore, parapet railings can compromise the overall integrity of the roof membrane. Summary of the Invention

[0005] In response to the above defects or improvement needs of the prior art, the present invention provides a low parapet roof waterproof structure and construction method, which improves the waterproof performance of the low parapet roof structure by integrally casting the roof structure board and the low parapet and externally setting up a composite waterproof system.

[0006] To achieve the above objectives, according to one aspect of the present invention, there is provided a low parapet roof waterproofing structure, comprising a low parapet and roof panel integrally cast assembly, a multifunctional roof structural layer, a low parapet railing assembly, a low parapet insulation structural layer, and an additional waterproofing assembly, wherein the low parapet and roof panel integrally cast assembly comprises pre-embedded vertical bars fixed to the main bars in the roof structural plate, a graphite plate insert is sleeved on the pre-embedded vertical bars, and the pre-embedded vertical bars are connected to steel bar supports, thereby reducing damage to the roof concrete layer during dismantling and repair;

[0007] The multifunctional roof structure layer includes a first waterproof layer, a roof insulation layer, a lightweight aggregate concrete slope layer, a second waterproof layer, a felt isolation layer, and a waterproof protective layer, which are laid on the roof structure board from bottom to top. The first waterproof layer and the second waterproof layer are both turned up and extended to the edge of the top surface of the low parapet to form an integral waterproof structure layer. The first waterproof layer and the second waterproof layer both include a non-curing asphalt waterproof coating and an SBS asphalt self-adhesive waterproof membrane laid thereon.

[0008] The low parapet railing assembly includes a stainless steel embedded plate pre-buried in the concrete structure of the parapet top surface, on which a railing post is welded, and the railing post is sleeved with a U-shaped closing clip that can be threaded and rotated to adjust the height, which clips and closes the SBS asphalt self-adhesive waterproof membrane laid at the railing post position on the parapet top surface;

[0009] The additional waterproof component includes an aluminum alloy strip arranged at the end of the SBS asphalt self-adhesive waterproof membrane on the top surface of the parapet, which ensures the integrity of the waterproof structure on the upper part of the parapet by nailing.

[0010] Furthermore, one end of the steel bar support is fixed to the embedded vertical reinforcement, and the other end is fixed with a main keel. The main keel is arranged on the outside of the vertical formwork inside the low parapet, and a three-section tension water-stop screw is also provided on the outside of the formwork.

[0011] Furthermore, the low parapet and roof panel integrated casting assembly also includes a roof panel scaffolding, and a secondary keel is provided between the roof panel scaffolding and the formwork at the bottom of the roof.

[0012] Furthermore, the first waterproof layer and the second waterproof layer both include a non-curing asphalt waterproof coating and an SBS asphalt self-adhesive waterproof membrane laid thereon.

[0013] Furthermore, the multifunctional roof structure layer also includes a rock wool board fireproof isolation belt, which is arranged at the root of the low parapet and extends toward the roof to be flush with the roof insulation layer.

[0014] Furthermore, the low parapet railing assembly also includes a skirting board arranged at the lower part of the railing and a closing rope for temporarily fixing the SBS asphalt self-adhesive waterproof membrane around the railing.

[0015] Furthermore, the low parapet wall insulation structure layer includes an extruded polystyrene board and an autoclaved aerated concrete block sequentially arranged in a concrete groove of the parapet wall, and a building insulation mortar layer sprayed on the outermost layer of the integral wall;

[0016] Furthermore, the additional waterproof component also includes an eagle's beak arranged on the lower edge of the outer side of the parapet, an additional waterproof layer, sealing paste at cracks or cuts, and internal corner plastering.

[0017] According to another aspect of the present invention, a construction method of a low parapet roof waterproof structure is provided, which is implemented using the low parapet roof waterproof structure described above and is characterized in that it includes the following specific steps:

[0018] S100: The roof structure slab and parapet are simultaneously reinforced, the formwork is erected, and the concrete is poured and cured to the demoulding strength before the formwork is removed to form the whole structure;

[0019] S200: Treat the surface base of the poured roof structure slab and parapet wall. At the same time, install the low parapet wall railings and weld the bottom of the railing column to the stainless steel embedded plate pre-buried on the top surface of the low parapet wall.

[0020] S300: Construct the first waterproof layer on the roof structure board and the top surface of the parapet, and turn the first waterproof layer up to the top surface of the parapet. Use the closing rope to temporarily fix the asphalt self-adhesive waterproof membrane at the railing position.

[0021] S400: construct the roof insulation layer and slope adjustment layer on the first waterproof layer of the roof structure board in sequence;

[0022] S500: Construct a second waterproof layer on the slope leveling layer. Like the first waterproof layer, the second waterproof layer is also folded up to the top of the parapet. Finally, use U-shaped closing clips to secure the asphalt self-adhesive waterproof membrane. The end of the asphalt self-adhesive waterproof membrane on the top of the parapet is nailed with aluminum alloy strips.

[0023] S600: Construct the waterproof isolation layer and waterproof protection layer on the second waterproof layer of the roof structure board in sequence to complete the construction of the multifunctional roof structure layer;

[0024] S700: Construct the low parapet insulation structure layer and add a hawk's beak at the bottom of the eaves to complete the low parapet roof waterproof structure.

[0025] Furthermore, in step S100, after the formwork is removed, the graphite plate inserts and the embedded vertical bars are removed, the areas around the graphite plate inserts are roughened and cleaned, and slightly expansive concrete is poured.

[0026] Furthermore, in step S400, before pouring the waterproof protective layer, the uneven surfaces and surface gaps of the slope layer are filled with non-curing asphalt waterproof coating.

[0027] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0028] 1. The present invention adopts an integrated construction method of the low parapet and roof formwork. The roof structure plate and the parapet are cast and formed simultaneously, which reduces the construction joint between the parapet and the roof structure plate, improves the roof waterproof performance from the wall structure itself, and arranges a multifunctional structural layer on the roof structure layer, which includes two waterproof layers. Both layers are turned over from the roof structure plate to the top surface of the parapet to form an integral waterproof structural layer, further enhancing the waterproof performance.

[0029] 2. The present invention's method for constructing a low parapet roof waterproof structure involves pre-embedding vertical reinforcement at regular intervals parallel to the parapet roof. Graphite sheet inserts are placed above the pre-embedded vertical reinforcements. The ends of the steel supports are secured to the pre-embedded vertical reinforcements and the main keel to form the support formwork. After the roof structure panels are cast, the formwork is removed, the graphite sheet inserts and pre-embedded vertical reinforcements are removed, the surface around the graphite sheet inserts is roughened and cleaned, and then micro-expansive concrete is poured. This method avoids the traditional method of embedding the steel supports directly into the roof structure, thus avoiding the need to gouge concrete when removing the steel supports, and thus minimizing damage to the roof reinforcement protective layer.

[0030] 3. After the waterproof membrane of the low parapet railing of the present invention is turned up, the turned-up membrane is temporarily fixed with a PE closing rope, and then closed with a U-shaped closing buckle, and the end of the waterproof membrane on the top surface of the parapet is nailed with an L-shaped aluminum alloy pressure strip, thereby ensuring the integrity of the waterproof structure on the upper part of the parapet and improving the waterproof performance.

[0031] 4. The low parapet railings of this invention feature a skirting board at the bottom for safety protection, preventing accumulated snow from sliding off in rainy or snowy weather. A stainless steel embedded plate is installed on the top of the low parapet. During railing installation, the bottom of the railing is directly welded to the embedded stainless steel plate, preventing damage to the pre-installed waterproof layer on the parapet top and enhancing waterproof integrity.

[0032] 5. The present invention uses non-curing asphalt waterproof coating to fill local uneven areas. It is strictly forbidden to use mortar filling to ensure the bonding between the roof waterproof layer and the main structure and reduce the hidden danger of roof leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of a low parapet roof waterproof structure according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the low parapet roof railing structure according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the waterproof closing structure of the low parapet roof railing according to an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the integrated formwork structure of the low parapet and roof panel according to an embodiment of the present invention;

[0037] Figure 5 The present invention is a flowchart of a method for constructing a low parapet roof waterproof structure according to an embodiment of the present invention.

[0038] In all the drawings, the same reference numerals represent the same technical features, specifically: 1- building insulation mortar layer; 2- L-shaped aluminum alloy strip; 3- nails; 4- autoclaved aerated concrete blocks; 5- extruded polystyrene board; 6- stainless steel embedded plate; 7- skirting board; 8- railing; 9- roof structure board; 10- non-curing asphalt waterproof coating; 11- SBS asphalt self-adhesive waterproof membrane; 12- roof insulation layer; 13- rock wool board fire isolation layer; 14- lightweight aggregate concrete Soil slope layer; 15-second waterproof layer; 16-felt isolation layer; 17-waterproof protective layer; 18-sealing paste; 19-eagle beak; 20-root canal additional waterproof layer; 21-inside corner plastering; 22-closing rope; 23-U-shaped closing clip; 24-exhaust duct; 25-formwork; 26-three-section tension waterstop screw; 27-main keel; 28-steel support; 29-embedded vertical reinforcement; 30-graphite plate insert; 31-roof panel scaffolding; 32-secondary keel. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the present invention, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "comprise..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0042] Example 1

[0043] like Figure 1-4 As shown, an embodiment of the present invention provides a low parapet roof waterproof structure, including a low parapet and roof panel integrated casting assembly, a roof multifunctional structural layer, a low parapet railing assembly, a low parapet insulation structural layer and an additional waterproof assembly, wherein:

[0044] The low parapet and roof panel integrated casting assembly includes a formwork 25, a three-section tensioning water-stop screw 26, a main keel 27, a steel support 28, embedded vertical reinforcement 29, a graphite plate insert 30, a roof panel scaffold 31, and a secondary keel 32.

[0045] The main purlin 27 is arranged vertically along the height of the parapet wall formwork, perpendicular to the surface. It is fixed to the outside of the parapet wall formwork 25 system by three-stage tensioning water-stop screws 26, bearing the lateral pressure during concrete pouring. The secondary purlins 32 are arranged at intervals below the formwork 25 at the bottom of the roof. They serve as transverse distribution components, transferring the concrete pouring load from the formwork to the roof panel scaffolding 31, avoiding local overload and deformation of the formwork and enhancing overall stability. The embedded vertical reinforcement 29 is fixed to the main reinforcement in the roof structure panel 9 and is parallel to the parapet wall at a certain distance. The inverted trapezoidal graphite plate insert 30 is sleeved on the top of the embedded vertical reinforcement 29. The embedded vertical reinforcement 29 is connected to the steel support 28, which is arranged at a longitudinal spacing of 1m to 1.5m. One end is fixed to the embedded vertical reinforcement 29 and the other end is fixed to the main purlin 27 to support the parapet wall formwork.

[0046] The multifunctional roof structure layer includes a first waterproof layer, a roof insulation layer 12, a rock wool board fireproof isolation layer 13, a lightweight aggregate concrete slope layer 14, a second waterproof layer 15, a felt isolation layer 16, and a waterproof protective layer 17. The first waterproof layer and the second waterproof layer 15 both include a non-curing asphalt waterproof coating 10 and an SBS asphalt self-adhesive waterproof membrane 11. The non-curing asphalt waterproof coating 10 is fully coated on the surface of the roof structure board 9 and the top surface of the low parapet wall, forming a chemical bond with the base layer, filling microcracks and serving as a transition layer for the SBS asphalt self-adhesive waterproof membrane 11. The SBS asphalt self-adhesive waterproof membrane 11 is laid on the non-curing asphalt waterproof coating 10 with an overlap width of ≥80 mm. A continuous and sealed waterproof layer is formed by hot-melt welding, and a "chemical + physical" double composite waterproof body is formed with the non-curing asphalt waterproof coating 10. The roof insulation layer 12 is tightly laid on the first waterproof layer 11, and extruded polystyrene board or rigid polyurethane foam board is used. The rock wool board fire isolation belt 13 is extended along the root of the low parapet toward the roof with a width of 600mm, and then flush with the roof insulation layer 12 and caulked with fireproof sealant to block the flame spread path. The lightweight aggregate concrete slope layer 14 is poured on the roof insulation layer 12 with a slope of ≥2% and a compacted and polished surface. The second waterproof layer 15 is laid on the roof insulation layer 12 and extends upward to the edge of the top surface of the low parapet. The waterproof protective layer 17 uses cast-in-place C20 fine stone concrete with a thickness of ≥40mm and a Φ4@200mm steel mesh inside. The felt isolation layer 16 is laid between the second waterproof layer 15 and the waterproof protective layer 17 to prevent the concrete shrinkage stress of the waterproof protective layer 17 from being transmitted to the second waterproof layer 15. Through the interface optimization and functional synergy of the above-mentioned multi-layer materials, the waterproofing, insulation, fire protection and drainage of the roof system are integrated, which significantly improves the durability and reliability of the low parapet roof.

[0047] like Figure 2 and Figure 3As shown, the low parapet railing assembly includes a stainless steel embedded plate 6, a skirting board 7, a railing 8, a PE closing rope 22, and a U-shaped closing clip 23. The stainless steel embedded plate 6 is pre-buried in the concrete structure of the parapet top surface. The bottom of the railing 8 is welded and fixed to the 6 stainless steel embedded plate. The skirting board 6 is set at the bottom of the railing 8 for safety protection to prevent snow from sliding in rainy and snowy weather. The PE closing rope 22 temporarily fixes the SBS asphalt self-adhesive waterproof membrane 11 that is turned up around the railing 8. The U-shaped closing clip 23 is sleeved on the railing 8 upright and can be threaded and rotated to adjust the height and finally fix the SBS asphalt self-adhesive waterproof membrane 11.

[0048] The low parapet insulation structure layer includes a building insulation mortar layer 1, autoclaved aerated concrete blocks 4, and extruded polystyrene boards 5; the extruded polystyrene boards 5 are pasted on the outer surface of the parapet concrete groove wall as the inner insulation layer, and the autoclaved aerated concrete blocks 4 are built on the outside of the extruded polystyrene boards 5 as the middle insulation layer and flush with the outer side of the low parapet structure wall. The building insulation mortar layer 1 is sprayed on the outermost layer of the wall as the outer insulation layer and decorates the wall surface to form an integrated insulation-decoration structure.

[0049] The additional components include exhaust duct 24, L-shaped aluminum alloy strip 2, nails 3, eagle beak 19, additional waterproof layer 20 at the root of the pipe, sealing paste 18 and internal corner plaster 21.

[0050] The exhaust duct 24 vertically penetrates each layer above the roof structure plate 9. The horizontal pipe installation spacing of the exhaust duct 24 is 6m, and the vertical pipe out of the roof is arranged in a plum blossom shape, facing away from the parapet.

[0051] An L-shaped aluminum alloy molding is set at the end of the SBS asphalt self-adhesive waterproof membrane 11 on the top surface of the parapet, covering the edge of the membrane and extending to the outside of the wall, and is pressed by nails 3 to increase the sealing of the end of the waterproof membrane; the eagle's beak 19 is set at the lower edge of the outer side of the parapet, with a bevel angle of ≥45°, so that water droplets fall freely (reducing wall sagging by 90%); the additional waterproof layer 20 at the pipe root is set within 300mm around the root of the exhaust duct 24, and the overlap width with the second waterproof layer 15 is ≥150mm; the sealing paste 18 is applied to various cut seams, connection seams or locations where enhanced sealing is required.

[0052] Example 2

[0053] like Figure 5 As shown, an embodiment of the present invention provides a method for constructing a low parapet roof waterproof structure, comprising the following specific steps:

[0054] S100: tying steel bars, setting up formwork, pouring concrete and curing the roof structure plate 9 and the parapet wall simultaneously to form the whole structure.

[0055] Specifically, a roof panel scaffolding 31 is erected, secondary purlins 32, formwork 25, and main purlins 27 are installed, a stainless steel embedded plate 6 is embedded on the top surface of the low parapet, a three-section tensioning water-stop screw 26 is used to fix the parapet formwork, embedded vertical bars 29 are tied to the main bars of the roof structure plate, graphite plate inserts 30 are set, and steel bars 28 are connected to support the parapet formwork. When the concrete is poured and cured to the demolding strength, the formwork is removed, the graphite plate inserts 30 and embedded vertical bars 29 are removed, the surface around the graphite plate inserts 30 is chiseled and cleaned, and micro-expansive concrete is poured. The roof is sprinkled and cured to the design strength to form an integrated low parapet and roof panel.

[0056] Furthermore, a water-tightness test of the roof structure was carried out. Small cracks and other problems were repaired with acrylate waterproof coatings. Obvious structural defects were filled with polymer waterproof mortar, and cement-based penetrating crystallization waterproof coatings were applied on the defect surface and within 100mm around it.

[0057] S200: Treat the surface base of the poured roof structure slab and parapet wall, and install the low parapet wall railings at the same time. Weld and fix the bottom of the 8 railing columns to the stainless steel embedded plate pre-buried on the top surface of the low parapet wall;

[0058] Specifically, first clean the debris and dust on the surface of the roof structure board to ensure that the base layer is flat, clean and dry, fill the local uneven places with non-curing asphalt waterproof coating 10, plaster the parapet and the inner and outer corners of the roof structure to make arcs or blunt angles, and make additional waterproof layers at the junction of the parapet and the roof, downspouts, pipe roots, roof structures and other leak-prone areas, and use non-curing asphalt waterproof coating to enhance the waterproof effect.

[0059] S300: The first waterproof layer is constructed on the roof structure board and the top surface of the parapet. First, 1.5-2.0mm non-curing asphalt waterproof coating 10 is sprayed. Then, SBS asphalt self-adhesive waterproof membrane 11 is constructed by hot melt method. The first waterproof layer is turned up to the top surface of the parapet. The asphalt self-adhesive waterproof membrane 11 is temporarily fixed with a closing rope 22 at the position of the railing 8 column.

[0060] The non-curing asphalt waterproof coating 10 needs to be applied in two coats to ensure the required thickness. A serrated blade is used to apply the coating from one side to the other, with the two coats applied perpendicularly. The SBS asphalt self-adhesive waterproof membrane 11 has a 100mm overlap on both the long and short sides and is laid in the same direction and order, following the roof slope.

[0061] Furthermore, after the first waterproof layer is accepted, a water-tightness test of the roof waterproof layer is carried out, with water storage time of no less than 24 hours. The roof and the base of the parapet are observed, and it is qualified if there is no leakage.

[0062] S400: Lay the roof insulation layer 12 on the first waterproof layer of the roof structure board 8, first set the rock wool board fire isolation belt 13 in the 600mm wide range from the roof to the low parapet, and then lay the roof insulation layer 12.

[0063] S500: Lay the slope leveling layer 14 on the roof insulation layer 12. Use lightweight aggregate concrete with LC7.5 strength for the slope leveling layer 14. Before pouring, make a ash cake according to the designed slope to control the pouring thickness and slope. After the slope leveling layer is cured to the designed strength, fill the uneven surface and surface gaps of the slope leveling layer with non-curing asphalt waterproof coating.

[0064] S600: Construct the second waterproof layer 15 on the slope layer. First, spray 1.5-2.0mm non-curing asphalt waterproof coating 10, and then use the hot melt method to construct SBS asphalt self-adhesive waterproof membrane 11. The second waterproof layer 15 is also turned up to the top surface of the parapet, and the asphalt self-adhesive waterproof membrane 11 of the second waterproof layer 15 is temporarily fixed with a closing rope 22 at the position of the railing 8. Finally, move the U-shaped closing buckle 23 downward to close the second waterproof layer and the asphalt self-adhesive waterproof membrane 11 of the second waterproof layer 15. The end of the waterproof membrane on the top surface of the parapet is nailed with 1mm thick L-shaped aluminum alloy strips 2, and the nail spacing is 300mm-500mm. Apply sealant 18 to the end several times to enhance the seal.

[0065] S700: Lay a waterproof isolation layer 16 on the second waterproof layer 15, which uses a roofing felt isolation layer, and then pour a waterproof protective layer 17 on the waterproof isolation layer 16, and perform a slit treatment on the waterproof protective layer 17. The slit position is the same as the position of the exhaust duct 24 laying path to ensure the appearance. After watering and curing to the design strength, use a flexible sealing paste 18 to fill the slit.

[0066] S800: Construction of low parapet insulation structure layer. Specifically, after constructing extruded polystyrene insulation board 5 and autoclaved aerated concrete blocks in the groove of the low parapet, spray the building insulation mortar 1 on the entire outer wall of the low parapet, and add a hawk beak 19 at the bottom of the eaves. The low parapet insulation mortar and the roof waterproof protection layer 17 are sealed with sealant 18.

[0067] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low parapet roof waterproof structure, characterized in that: It includes low parapet and roof panel integrated casting components, roof multifunctional structural layer, low parapet railing components, low parapet insulation structural layer and additional waterproof components, among which, The low parapet and roof panel integral casting assembly includes pre-buried vertical reinforcement (29), which is fixed to the main reinforcement in the roof structure panel (9), a graphite plate insert (30) is sleeved on the top of the pre-buried vertical reinforcement (29), and the pre-buried vertical reinforcement (29) is connected to the steel support (28), so as to reduce damage to the roof concrete layer during dismantling and repair; The multifunctional roof structure layer comprises a first waterproof layer, a roof insulation layer (12), a lightweight aggregate concrete slope layer (14), a second waterproof layer (15), a felt isolation layer (16) and a waterproof protective layer (17) which are sequentially laid on the roof structure plate (9) from bottom to top, wherein the first waterproof layer and the second waterproof layer (15) are both turned up and extended to the edge of the top surface of the low parapet to form an integral waterproof structure layer; the first waterproof layer and the second waterproof layer (15) both comprise a non-curing asphalt waterproof coating (10) and an SBS asphalt self-adhesive waterproof membrane (11) laid thereon; The low parapet railing assembly comprises a stainless steel embedded plate (6) pre-buried in the concrete structure of the parapet top surface, on which a railing (8) upright is welded, and the railing (8) upright is sleeved with a U-shaped closing buckle (23) that can be threaded and rotated to adjust the height, which closes the SBS asphalt self-adhesive waterproof membrane (11) laid at the position of the railing (8) upright on the parapet top surface; The additional waterproof component comprises an aluminum alloy strip (2) arranged at the end of the SBS asphalt self-adhesive waterproof membrane (11) on the top surface of the parapet, and is nailed with nails (3) to ensure the integrity of the waterproof structure on the upper part of the parapet.

2. A low parapet roof waterproof structure according to claim 1, characterized in that: One end of the steel support (28) is fixed to the embedded vertical reinforcement (29), and the other end is fixed to the main keel (27). The main keel (27) is arranged on the outside of the vertical formwork (25) on the inner side of the low parapet, and the outside of the formwork (25) is also provided with a three-section pulling water-stop screw (26).

3. A low parapet roof waterproof structure according to claim 1, characterized in that: The multifunctional roof structure layer also includes a rock wool board fireproof isolation belt (13), which is arranged at the base of the low parapet and extends toward the roof to be flush with the roof insulation layer (12).

4. A low parapet roof waterproof structure according to claim 1, characterized in that: The low parapet railing assembly further comprises a skirting board (7) arranged at the lower part of the railing (8) and a closing rope (22) for temporarily fixing the SBS asphalt self-adhesive waterproof membrane (10) around the railing (8).

5. The low parapet roof waterproof structure according to claim 1, characterized in that: The low parapet wall thermal insulation structural layer comprises an extruded polystyrene board (5) and an autoclaved aerated concrete block (4) sequentially arranged in a parapet wall concrete groove, and a building thermal insulation mortar layer (1) sprayed on the outermost layer of the integral wall.

6. A low parapet roof waterproof structure according to any one of claims 1 to 5, characterized in that: The additional waterproof component also includes a beak (19) arranged at the lower edge of the outer side of the parapet, a sealing paste (18) at the cut seam or the connecting seam, and internal corner plastering (21).

7. A low parapet roof waterproof structure according to any one of claims 1 to 5, characterized in that: The low parapet and roof panel integrated casting assembly further comprises a roof panel scaffold (31), and a secondary keel (32) is provided between the roof panel scaffold (31) and the formwork (25) at the bottom of the roof.

8. A construction method for a low parapet roof waterproof structure, implemented using a low parapet roof waterproof structure according to any one of claims 1 to 7, characterized in that: The specific steps include: S100: The roof structure slab and parapet are simultaneously reinforced, the formwork is erected, and the concrete is poured and cured to the demoulding strength before the formwork is removed to form the whole structure; S200: Treat the surface base of the poured roof structure slab and parapet wall, and install the low parapet wall railings by welding the bottom of the railing column to the stainless steel embedded plate pre-buried on the top surface of the low parapet wall; S300: Construct the first waterproof layer on the roof structure board and the top surface of the parapet, and turn the first waterproof layer up to the top surface of the parapet. Use the closing rope to temporarily fix the asphalt self-adhesive waterproof membrane at the railing position. S400: construct the roof insulation layer and slope adjustment layer on the first waterproof layer of the roof structure board in sequence; S500: Construct a second waterproof layer on the slope leveling layer. Like the first waterproof layer, the second waterproof layer is also folded up to the top of the parapet. Finally, use U-shaped closing clips to secure the asphalt self-adhesive waterproof membrane. The end of the asphalt self-adhesive waterproof membrane on the top of the parapet is nailed with aluminum alloy strips. S600: Construct the waterproof isolation layer and waterproof protection layer on the second waterproof layer of the roof structure board in sequence to complete the construction of the multifunctional roof structure layer; S700: Construct the low parapet insulation structure layer and add a hawk beak at the bottom of the eaves to complete the low parapet roof waterproof structure construction.

9. The construction method of a low parapet roof waterproof structure according to claim 1, characterized in that: In step S100, after the formwork is removed, the graphite plate inserts and pre-embedded vertical reinforcement are removed, the area around the graphite plate inserts is roughened and cleaned, and slightly expansive concrete is poured.

10. The construction method of a low parapet roof waterproof structure according to claim 1, characterized in that: In step S400, before pouring the waterproof protective layer, the uneven surfaces and surface gaps of the slope layer are filled with non-curing asphalt waterproof coating.

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