Parapet wall system with composite structure

Abstract

The utility model provides a parapet wall system with a composite structure, which comprises a planting structure layer, a drainage protection component, a rigid protection layer and a composite waterproof layer which are fixedly connected in sequence from top to bottom, and comprises an SBS (styrene butadiene styrene) modified asphalt root puncture resistant coiled material arranged at the bottom end of the rigid protection layer and connected with the bottom end of the rigid protection layer in a bonding manner from bottom to top, a self-adhesive polymer modified asphalt coiled material is lapped on the base plate in a staggered joint manner; a base layer structure and a DS mortar leveling layer; the extruded polystyrene board thermal insulation layer is arranged between the existing reinforced concrete roof board and the LC7.5 lightweight aggregate concrete sloping layer; the existing reinforced concrete roof panel is in double fixed connection with the extruded polystyrene board heat preservation layer through a binder and an anchor bolt. The roof repairing position is combined with an original method to supplement anti-rolling materials and waterproof coatings for lap joint, the steel plate net and the pebbles are arranged for isolation, the waterproof sealing performance of the roof is guaranteed, the waterproof service life of the roof is guaranteed, economic losses caused by leakage are avoided, and good economic benefits are achieved.

Description

A composite structure parapet wall system Technical Field

[0001] This utility model relates to the field of architectural design technology, and in particular to a composite structure parapet wall system. Background Technology

[0002] During partial roof renovations, waterproofing damage is prone to occur due to adjustments in architectural design and structural construction. This is even more pronounced in the renovation of green roofs. If waterproofing and sealing fail, rainwater leakage can occur, leading to difficult repairs and significant economic losses. Summary of the Invention

[0003] The purpose of this invention is to provide a composite parapet wall system to solve the aforementioned problems in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A composite parapet wall system includes the following structural layers that are fixedly connected from top to bottom:

[0006] The planting structure layer includes:

[0007] Planting soil layer; its bottom is covered with 200g / m 2 The non-woven fabric filter layer has a pebble strip with a width of ≥100mm and a pebble particle size of 10-20mm at the junction.

[0008] Drainage protection components, including:

[0009] The drainage board has a raised end facing the planting structure layer, and the lower surface of the drainage board is covered with a geotextile isolation layer.

[0010] Rigid protective layer, including:

[0011] C20 fine aggregate concrete layer, poured on a high-concave-convex drainage board;

[0012] The composite waterproof layer, from bottom to top, includes:

[0013] SBS modified bitumen root-penetration resistant membrane is placed at the bottom of the rigid protective layer and bonded to the bottom of the rigid protective layer. Self-adhesive polymer modified bitumen membrane is overlapped on it with staggered joints. Its bottom layer is a polymer cement waterproof coating layer with fiberglass mesh embedded in the coating layer.

[0014] Basic structural elements include:

[0015] DS mortar leveling layer;

[0016] The LC7.5 lightweight aggregate concrete slope-finding layer is bonded to the bottom of the DS mortar leveling layer;

[0017] Extruded polystyrene board insulation layer is installed between the existing reinforced concrete roof slab and the LC7.5 lightweight aggregate concrete slope layer;

[0018] The existing reinforced concrete roof slab is fixedly connected to the extruded polystyrene board insulation layer by adhesive and anchor bolts.

[0019] In some specific embodiments, the thickness of the planting soil layer laid in the planting structure layer is 200-500 mm.

[0020] In some specific embodiments, the protrusion height of the high-concave-convex drainage plate in the drainage protection assembly is 20-30mm.

[0021] In some specific embodiments, the C20 fine aggregate concrete layer in the rigid protective layer is 40mm thick and is provided with an internal φ8@200 bidirectional steel mesh.

[0022] In some specific embodiments, the thickness of the SBS modified bitumen root-penetration resistant membrane in the composite waterproof layer is 4 mm, the thickness of the self-adhesive polymer modified bitumen membrane is 3 mm, and the thickness of the polymer cement waterproof coating layer is 1.5 mm.

[0023] In some specific embodiments, the thickness of the DS mortar leveling layer in the base structure is 20mm;

[0024] The thickness of the LC7.5 lightweight aggregate concrete slope-finding layer is 30mm;

[0025] The thickness of the extruded polystyrene board insulation layer is 50mm.

[0026] In some specific embodiments, the bidirectional steel mesh is fixed to the protruding end of the drainage board by plastic anchors with a spacing of ≤200mm;

[0027] The C20 fine aggregate concrete layer is perforated with dividing joints of ≤3m in thickness and spacing, and the joints are filled with high-elasticity polyurethane sealant.

[0028] The beneficial effects of this utility model are:

[0029] This utility model provides a composite parapet wall system, comprising the following structural layers fixedly connected from top to bottom: a planting structural layer, including a vegetation planting soil layer; the bottom of which is covered with 200g / m² soil. 2The system includes a non-woven fabric filter layer with a pebble strip ≥100mm wide at the junction, with pebbles of 10-20mm in diameter; drainage protection components, including a raised drainage board with the raised end facing the planting structure layer, and a geotextile isolation layer covering the lower surface of the drainage board; a rigid protective layer, including a C20 fine aggregate concrete layer poured on top of the raised drainage board; and a composite waterproof layer, from bottom to top, including an SBS modified bitumen root-penetration resistant membrane placed at the bottom of the rigid protective layer and bonded to it. The self-adhesive polymer-modified bitumen roll with staggered joints has a polymer cement waterproof coating layer as its bottom layer, with fiberglass mesh embedded within the coating layer. The base structure includes: a DS mortar leveling layer; an LC7.5 lightweight aggregate concrete slope-forming layer, bonded to the bottom of the DS mortar leveling layer; and an extruded polystyrene board insulation layer, positioned between the existing reinforced concrete roof panel and the LC7.5 lightweight aggregate concrete slope-forming layer. The existing reinforced concrete roof panel and the extruded polystyrene board insulation layer are doubly fixed together using adhesive and anchors. At the roof repair site, additional waterproof roll material and waterproof coating are applied and overlapped, with steel mesh and pebbles used for isolation to ensure the roof's waterproof sealing performance, guarantee the roof's waterproof lifespan, and avoid economic losses due to leakage, resulting in good economic benefits. Engineering demonstrations have shown that this reduces demolition and alterations, saves resources, and provides excellent waterproof performance, offering an economical and reliable technical approach for urban renewal. It is highly feasible and conducive to application and promotion. Attached Figure Description

[0030] Figure 1 is a structural schematic diagram of a composite parapet wall system according to this utility model;

[0031] Figure 2 is a partial enlarged view of part A of this utility model;

[0032] Figure 3 is a partial enlarged view of part B of this utility model;

[0033] Figure 4 is a partial enlarged view of point C of this utility model.

[0034] In the attached diagram, 101 is the planting soil layer; 102 is the non-woven filter layer; 103 is the pebble strip; 201 is the high-concave-convex drainage board; 202 is the geotextile isolation layer; 301 is the C20 fine stone concrete layer; 401 is the SBS modified bitumen root-penetration resistant membrane; 402 is the self-adhesive polymer modified bitumen membrane; 403 is the polymer cement waterproof coating layer; 404 is the fiberglass mesh; 501 is the DS mortar leveling layer; 502 is the LC7.5 lightweight aggregate concrete slope layer; 503 is the extruded polystyrene board insulation layer; and 601 is the existing reinforced concrete roof slab. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0036] Referring to Figures 1, 2, 3, and 4, a composite parapet wall system includes the following structural layers that are fixedly connected from top to bottom:

[0037] The planting structure layer includes a vegetation planting soil layer 101; its bottom is covered with a 200g / m² layer. 2 The non-woven filter layer 102 has a basalt pebble band 103 with a width ≥100mm at the junction of the two, and the pebble particle size is 10-20mm.

[0038] Drainage protection components, including:

[0039] High-concave-convex drainage board 201, with the convex end facing the planting structure layer, adjacent drainage boards are connected by interlocking grooves, and the lower surface of the drainage board is covered with a weight ≥300g / m². 2 Geotextile isolation layer 202;

[0040] Rigid protective layer, including:

[0041] C20 fine aggregate concrete layer 301 is poured on the high-concave-convex drainage board 201; it has a built-in φ6@200 bidirectional steel mesh, which is fixed to the raised end of the drainage board by plastic anchors with a spacing of ≤200mm.

[0042] Expansion joints that penetrate the thickness of the concrete layer and are spaced ≤3m apart are filled with highly elastic polyurethane sealant.

[0043] Apply cement slurry interface agent (water-cement ratio 0.4) between the drainage board and the structural layer to enhance adhesion.

[0044] The composite waterproof layer, from bottom to top, includes:

[0045] SBS modified bitumen root-penetration resistant membrane 401 is placed at the bottom of the rigid protective layer and bonded to the bottom of the rigid protective layer. A 3mm thick self-adhesive polymer modified bitumen membrane 402 is overlapped on it with staggered joints, with a longitudinal overlap width of ≥80mm. The bottom layer is a 1.5mm thick polymer cement waterproof coating layer 403, with a 5mm×5mm fiberglass mesh 404 embedded in the coating layer.

[0046] Basic structural elements include:

[0047] DS mortar leveling layer 501, surface flatness error ≤3mm;

[0048] The thinnest part is 30mm thick LC7.5 lightweight aggregate concrete slope-finding layer 502, with a slope of 1.5%-2.5%, which is directly bonded to the leveling layer;

[0049] Extruded polystyrene board insulation layer 503, board joints filled with polyurethane foam sealant;

[0050] The existing reinforced concrete roof panel 601 is fixedly connected to the insulation layer by both adhesive and anchor bolts.

[0051] In this embodiment, 1. Planting structure layer: upper layer → lower layer:

[0052] The planting soil layer for vegetation is directly laid at 200g / m 2 On the non-woven filter layer 102;

[0053] A basalt pebble strip 103 (width ≥ 100 mm, particle size 10-20 mm) is set at the junction of the non-woven filter layer 102 and the drainage protection component as a transition layer to prevent the loss of planting soil and assist in water conduction.

[0054] 1) Soil layer for planting vegetation

[0055] Effects:

[0056] Ecological functions: It provides a growth substrate for plants, absorbs carbon dioxide and releases oxygen, and alleviates the urban heat island effect.

[0057] Soil and water conservation: By fixing the soil with roots, soil erosion caused by rainwater runoff is reduced.

[0058] Water storage and temperature regulation: It absorbs and temporarily stores some rainwater, and in summer, it reduces the roof temperature through evaporation (by about 5-8℃).

[0059] (2) 200g / m 2 Non-woven filter layer

[0060] Effects:

[0061] Filtering impurities: Prevents fine particles in the planting soil from entering the drainage system and thus prevents drainage channels from becoming clogged.

[0062] Permeable and soil-retaining: Permeability ≥ 1.0 × 10-2 cm / s, ensuring smooth rainwater infiltration while preventing soil erosion.

[0063] (3) Basalt pebble zone 103 (width ≥ 100 mm, grain size 10-20 mm)

[0064] Effects:

[0065] Water-guiding transition: As a transition layer between the planting soil and the drainage board, it accelerates the lateral flow of rainwater into the cavity of the drainage board, reducing the risk of water accumulation.

[0066] Anti-clogging buffer: Intercepts large particles of mud and sand, protecting the non-woven filter layer 102 from being torn or clogged.

[0067] 2. Drainage and protection components: Upper layer → Lower layer:

[0068] The raised end of the high-concave-convex drainage board 201 faces upward and contacts the planting structure layer. It is connected by interlocking grooves (longitudinal overlap ≥100mm) to form a continuous drainage cavity.

[0069] The lower surface of the drainage board is covered with a weight of ≥300g / m² 2 The geotextile isolation layer 202 is fixed by stitching or adhesive to prevent concrete slurry from seeping into the drainage channel.

[0070] (1) High-concave-convex drainage board 201 (convex end facing upward)

[0071] Effects:

[0072] Three-dimensional drainage: The raised end forms a continuous cavity (water flow capacity ≥ 1.5L / (m²)). 2 •s)) to quickly drain seepage water and prevent water accumulation in the planting area.

[0073] Load distribution: The raised structure evenly distributes the upper load to the lower structural layer, reducing local stress concentration.

[0074] (2) Weight ≥ 300g / m 2 Geotextile isolation layer 202

[0075] Effects:

[0076] Seepage prevention and isolation: Prevents concrete slurry from seeping into the cavity of the drainage board, ensuring unobstructed drainage channels.

[0077] Flexible buffer: Reduces the hard friction between the concrete layer and the drainage board, and reduces damage caused by temperature difference deformation.

[0078] 3. Connection between the rigid protective layer and the drainage board:

[0079] C20 fine aggregate concrete layer 301 is poured between the raised ends of the high-concave-convex drainage board 201, and a cement slurry interface agent with a water-cement ratio of 0.4 is applied between the concrete and the drainage board to enhance the bond.

[0080] The φ6@200 bidirectional steel mesh is fixed to the top of the protruding end of the drainage board by plastic anchors (spacing ≤200mm). The anchors penetrate the protruding end of the drainage board and are embedded in the concrete layer.

[0081] High-elasticity polyurethane sealant is embedded in the expansion joints (spacing ≤ 3m, depth penetrating the concrete layer) to release temperature stress.

[0082] (1) C20 fine aggregate concrete layer 301

[0083] Effects:

[0084] Structural protection: compressive strength ≥ 20 MPa, distributed roof load (live load ≥ 3.0 kN / m) 2 This prevents the drainage board from deforming under pressure.

[0085] Crack resistance and stability: Incorporation of polypropylene fiber (0.9 kg / m²) 3 It inhibits shrinkage cracks and improves durability.

[0086] (2) φ6@200 bidirectional steel mesh

[0087] Effects:

[0088] Overall reinforcement: The tensile strength of the steel bars is ≥300MPa, and they work together with the concrete to resist temperature stress and uneven settlement.

[0089] Anchor bolt fixing: The load is transferred to the drainage board through plastic anchor bolts (pull-out force ≥0.8kN / bolt), which enhances the interlayer bonding.

[0090] (3) Expansion joints (filled with high-elasticity polyurethane sealant)

[0091] Effects:

[0092] Stress relief: The spacing between expansion joints is ≤3m, allowing the concrete layer to expand and contract freely, reducing temperature cracks (crack rate reduction ≥70%).

[0093] Waterproof sealing: Polyurethane sealant (elongation ≥400%) adapts to deformation and prevents rainwater from seeping into the underlying structural layer.

[0094] 4. Composite waterproof layer

[0095] Top-down connection:

[0096] Top layer: SBS root-penetration resistant membrane bonded to the bottom of the rigid protective layer (full bonding method, overlap width ≥100mm);

[0097] Intermediate layer: SBS membrane with staggered overlap of self-adhesive polymer modified bitumen membrane 402 (longitudinal overlap ≥80mm) to form a double physical waterproof layer;

[0098] Base layer: A 1.5mm thick polymer cement waterproof coating 403 is applied to the surface of the base structure, with a 5mm×5mm fiberglass mesh 404 embedded inside (overlap ≥100mm), which is directly bonded to the base structure.

[0099] (1) SBS root-penetration resistant roll material

[0100] Effects:

[0101] Root barrier: A 4mm thick asphalt layer containing a chemical root inhibitor (FLL certified) prevents plant roots from penetrating.

[0102] Physical waterproofing: tensile strength ≥800N / 50mm, adaptable to minor deformation of the substrate.

[0103] (2) Self-adhesive polymer-modified bitumen roll 402 (3mm thick)

[0104] Effects:

[0105] Double barrier: It overlaps with SBS roll material at staggered joints (overlap width ≥ 80mm) to form a redundant waterproof layer with a high tolerance for damage.

[0106] Self-healing ability: The self-adhesive layer can seal minor puncture damage, improving waterproof reliability.

[0107] (3) Polymer cement waterproof coating (1.5mm thick)

[0108] Effects:

[0109] Seamless coverage: After brushing and forming, it seamlessly adheres to the base layer and fills micro-cracks in the leveling layer (crack width ≤ 0.3mm).

[0110] Enhanced crack resistance: Embedded 404 fiberglass mesh (tensile strength ≥1000N / 50mm) improves the tensile strength of the coating and prevents the coating from cracking.

[0111] 5. Basic structural elements

[0112] Top-down connection:

[0113] DS mortar leveling layer 501 (flatness error ≤3mm) is directly bonded to LC7.5 lightweight aggregate concrete slope layer 502;

[0114] There is no isolation layer between the LC7.5 slope-finding layer (thinnest 30mm, slope 1.5%-2.5%) and the 503 extruded polystyrene insulation layer; it is directly poured and compacted.

[0115] The extruded polystyrene board insulation layer 503 is double-fixed to the existing reinforced concrete roof panel 601 by full adhesion with adhesive and anchor bolts (spacing ≤ 500mm), and the board joints are filled with polyurethane foam sealant.

[0116] (1) DS mortar leveling layer 501

[0117] Effects:

[0118] Substrate flatness: The flatness error is ≤3mm, which provides a uniform stress base for the waterproof layer and avoids hollowing of the membrane.

[0119] Bond transition: The bond strength between cement-based materials and lightweight aggregate concrete is ≥0.4MPa, ensuring coordinated deformation between structural layers.

[0120] (2) LC7.5 lightweight aggregate concrete slope-finding layer 502 (thinnest 30mm, slope 1.5%-2.5%)

[0121] Effects:

[0122] Slope drainage: Guides rainwater from the roof to the drain outlet, reducing water accumulation time (drainage efficiency improved by ≥30%).

[0123] Lightweight load reduction: density ≤1200kg / m³ 3 This reduces the structural load (by 25% compared to ordinary concrete).

[0124] (3) Extruded polystyrene board (XPS) insulation layer

[0125] Effects:

[0126] Thermal insulation: thermal conductivity ≤0.030W / (m·K), reducing indoor and outdoor heat transfer, energy saving rate ≥15%.

[0127] Compression protection: Compression strength ≥250kPa, withstands upper loads and protects roof panels.

[0128] (4) Existing reinforced concrete roof slab 601

[0129] Effects:

[0130] Structural load-bearing capacity: As the final load-bearing layer of the system, it bears all vertical loads (design bearing capacity ≥ 6.0 kN / m). 2 ).

[0131] Durable anchoring: It is fixed to the insulation layer by anchor bolts (pull-out force ≥0.6kN / bolt) to resist wind uplift.

[0132] In some specific embodiments, the thickness of the planting soil layer laid in the planting structure layer is 200-500 mm.

[0133] In some specific embodiments, the protrusion height of the high-concave-convex drainage plate 201 in the drainage protection assembly is 20-30mm.

[0134] In some specific embodiments, the C20 fine aggregate concrete layer 301 in the rigid protective layer is 40mm thick and is provided with an internal φ8@200 bidirectional steel mesh.

[0135] In some specific embodiments, the thickness of the SBS modified bitumen root-penetration resistant membrane 401 in the composite waterproof layer is 4 mm, the thickness of the self-adhesive polymer modified bitumen membrane 402 is 3 mm, and the thickness of the polymer cement waterproof coating layer 403 is 1.5 mm.

[0136] In some specific embodiments, the thickness of the DS mortar leveling layer 501 in the base structure is 20mm;

[0137] The thickness of the LC7.5 lightweight aggregate concrete slope-finding layer (502) is 30mm.

[0138] The thickness of the 503 extruded polystyrene insulation layer is 50mm.

[0139] In some specific embodiments, the bidirectional steel mesh is fixed to the protruding end of the drainage board by plastic anchors with a spacing of ≤200mm;

[0140] The C20 fine aggregate concrete layer 301 has through-cut joints with a thickness and spacing of ≤3m, and the joints are filled with high-elasticity polyurethane sealant.

[0141] The construction method of this utility model

[0142] I. Construction Preparation

[0143] Materials and Equipment

[0144] Key materials:

[0145] 200g / m 2 Non-woven filter layer 102, basalt pebbles (particle size 10-20mm), high-concave-convex drainage board 201 (with card groove), 300g / m 2 Geotextile;

[0146] C20 fine aggregate concrete (coarse aggregate ≤15mm), φ6@200 bidirectional steel mesh, plastic anchors (spacing ≤200mm), high elastic polyurethane sealant;

[0147] SBS root-penetration resistant membrane, self-adhesive polymer-modified bitumen membrane 402 (3mm thick), polymer cement waterproof coating (1.5mm thick, including 5mm×5mm fiberglass mesh 404);

[0148] DS mortar, LC7.5 lightweight aggregate concrete, extruded polystyrene board (XPS), and polyurethane foam sealant.

[0149] Tools and equipment: rebar cutter, hot melt welder, concrete vibrator, grinder, caulking gun, anchor drill.

[0150] Grassroots inspection

[0151] Check the flatness of the existing reinforced concrete roof slab (601) (error ≤ 5mm / 2m), clean the surface laitance and oil stains, and repair cracks.

[0152] II. Construction Process

[0153] 1. Construction of base structure

[0154] Extruded polystyrene board insulation layer 503:

[0155] XPS boards are laid using the full adhesive bonding method, with board gaps ≤2mm, filled with polyurethane foam sealant, and anchor bolt fixing spacing ≤500mm;

[0156] LC7.5 lightweight aggregate concrete slope-finding layer 502:

[0157] The thinnest part is 30mm, the slope is 1.5%-2.5%, it is vibrated to compact, and the surface is smoothed;

[0158] DS mortar leveling layer 501:

[0159] Thickness ≥ 20mm, flatness error ≤ 3mm / 2m, curing time ≥ 3 days.

[0160] 2. Construction of composite waterproof layer

[0161] Substrate preparation: Apply a 1.5mm thick polymer cement waterproof coating, with embedded 404 fiberglass mesh (overlap ≥100mm);

[0162] Roll material installation:

[0163] First, fully lay SBS root-penetration resistant membrane (overlap width ≥ 100 mm), then overlap self-adhesive polymer-modified bitumen membrane 402 with staggered joints (longitudinal overlap ≥ 80 mm);

[0164] The width of the additional layer at the inside and outside corners is ≥500mm, and the height of the rolled material at the end is ≥250mm.

[0165] 3. Construction of rigid protective layer

[0166] Drainage board fixing:

[0167] The 201 high-concave-convex drainage board has its raised end facing upwards, with interlocking grooves and pre-drilled anchor bolt holes with a spacing of ≤200mm.

[0168] Steel mesh installation:

[0169] The φ6@200 bidirectional steel mesh is laid in whole, with an overlap length of ≥150mm, and fixed to the drainage board by plastic anchors (anchoring depth ≥15mm);

[0170] Fine aggregate concrete pouring:

[0171] C20 fine aggregate concrete is poured in sections (each section ≤ 3m × 3m), compacted by plate vibration, and smoothed before initial setting.

[0172] Seam treatment:

[0173] After the concrete has set, cut the dividing joints (spacing ≤ 3m, depth continuous), clean them, and then inject polyurethane sealant (the sealant surface is recessed 2-3mm).

[0174] 4. Drainage and protection component construction

[0175] Geotextile covering: 300g / m² fully covered under the drainage board 2 Geotextile, overlap width ≥ 200mm, fixed with seams;

[0176] Basalt pebble strip 103: A pebble strip 103 with a width of ≥100mm is set at the junction of the bottom of the planting layer and the non-woven fabric, with pebble particle size of 10-20mm.

[0177] 5. Construction of planting structure layer

[0178] Non-woven filter layer 102: 200g / m 2 Non-woven fabric is fully laid, extending ≥50mm to the outer side of the pebble strip 103;

[0179] Backfilling of planting soil: Lightweight planting soil is backfilled in layers (each layer ≤300mm), with a compaction degree ≥85%.

[0180] III. Key Process Control

[0181] Key points of process quality control

[0182] The protruding end of the drainage board is correctly oriented, the adjacent board slots interlock seamlessly, and the anchor bolt hole positioning deviation is ≤5mm.

[0183] The steel mesh fixing anchors are driven vertically into the raised end of the drainage board. After fixing, the mesh does not warp, and the protective layer thickness is ≥20mm.

[0184] The sealant used to fill the joints is dense and adheres to the concrete without gaps, with an elastic recovery rate of ≥90%.

[0185] For SBS rolls, hot-melt lap joints are extruded with uniform asphalt strips; self-adhesive rolls show no air bubbles after peeling; and the lap width is fully inspected.

[0186] IV. Acceptance Standards

[0187] Main control projects:

[0188] The waterproof layer is leak-free (water tightness test ≥24h);

[0189] Concrete compressive strength ≥20 MPa.

[0190] In summary, the beneficial effects of this utility model are as follows:

[0191] I. Improved Structural Stability and Durability

[0192] Cooperative load transfer

[0193] The rigid protective layer (C20 fine aggregate concrete + steel mesh) and the high-concave-convex drainage board form a composite stress system, which can disperse the roof planting soil and live load, and avoid concrete cracking caused by local stress concentration.

[0194] The double-fixation of plastic anchors enhances the shear resistance of the interlayer interface, meeting the needs of wind-loaded areas.

[0195] Crack resistance optimization

[0196] The spacing between expansion joints is ≤3m, and the cutting depth penetrates the concrete layer. Combined with high-elasticity polyurethane sealant, it can release temperature stress and reduce the incidence of cracks.

[0197] II. Enhanced drainage and waterproofing performance

[0198] High-efficiency water diversion system

[0199] The raised ends of the high-concave-convex drainage board form continuous water-guiding cavities, preventing water accumulation and root rot in the planting soil;

[0200] The basalt pebble zone 103 serves as a transition layer, intercepting sediment and guiding water flow, thus reducing the risk of geotextile blockage.

[0201] Composite waterproofing system

[0202] SBS root-penetration resistant roll material + self-adhesive roll material with staggered joints to form a double physical barrier;

[0203] The polymer cement coating layer (1.5mm thick) is embedded with 404 fiberglass mesh to fill micro-cracks in the base layer and enhance adhesion.

[0204] III. Convenience and Economy of Construction

[0205] Modular installation of drainage boards with interlocking grooves and self-adhesive overlapping of roll materials reduces welding work and improves construction efficiency.

[0206] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A composite parapet wall system, characterized in that, The structure includes the following structural layers fixedly connected from top to bottom: a planting structure layer, including: a vegetation planting soil layer (101); its bottom is covered with 200g / m 2 A non-woven filter layer (102) is provided at the junction of the two with a pebble strip (103) with a width ≥100mm and a pebble particle size of 10-20mm; a drainage protection component including: a high-concave-convex drainage board (201) with the convex end facing the planting structure layer, and a geotextile isolation layer (202) covering the lower surface of the drainage board; a rigid protective layer including: a C20 fine stone concrete layer (301) poured on the high-concave-convex drainage board; a composite waterproof layer including, from bottom to top: an SBS modified bitumen root-penetration resistant membrane (401) set at the bottom of the rigid protective layer and bonded to the bottom of the rigid protective layer, with staggered overlaps on it. The self-adhesive polymer-modified bitumen roll (402) has a polymer cement waterproof coating layer (403) as its bottom layer, with fiberglass mesh (404) embedded in the coating layer; the base structure includes: DS mortar leveling layer (501); LC7.5 lightweight aggregate concrete slope layer (502), which is bonded to the bottom of the DS mortar leveling layer; extruded polystyrene board insulation layer (503), which is set between the existing reinforced concrete roof panel (601) and the LC7.5 lightweight aggregate concrete slope layer (502); the existing reinforced concrete roof panel (601) is double-fixed to the extruded polystyrene board insulation layer by adhesive and anchor bolts.

2. The composite parapet wall system according to claim 1, characterized in that, The thickness of the planting soil layer laid in the planting structure layer is 200-500mm.

3. The composite parapet wall system according to claim 1, characterized in that, The raised height of the high-concave-convex drainage plate in the drainage protection component is 20-30mm.

4. The composite parapet wall system according to claim 1, characterized in that, The rigid protective layer consists of a 40mm thick C20 fine aggregate concrete layer and is equipped with an internal φ8@200 bidirectional steel mesh.

5. The composite parapet wall system according to claim 1, characterized in that, The composite waterproof layer has a thickness of 4mm for SBS modified bitumen root-penetration resistant membrane (401), a thickness of 3mm for self-adhesive polymer modified bitumen membrane (402), and a thickness of 1.5mm for polymer cement waterproof coating layer (403).

6. The composite parapet wall system according to claim 1, characterized in that, The thickness of the DS mortar leveling layer (501) in the base structure is 20mm; the thickness of the LC7.5 lightweight aggregate concrete slope layer (502) is 30mm; and the thickness of the extruded polystyrene board insulation layer (503) is 50mm.

7. The composite parapet wall system according to claim 4, characterized in that, The bidirectional steel mesh is fixed to the protruding end of the drainage board by plastic anchors with a spacing of ≤200mm; the C20 fine stone concrete layer (301) is provided with dividing joints with a thickness and spacing of ≤3m, and the joints are filled with high elastic polyurethane sealant.

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