A steel-concrete prefabricated pitched roof construction device and construction method

Abstract

This invention discloses a prefabricated steel-concrete pitched roof construction device, comprising several precast columns with one end vertically fixed to the ground, several precast main beams with both ends fixed to the tops of two precast columns and parallel to each other, secondary beams perpendicular to the precast main beams and with both ends fixed to the tops of the precast main beams, a positioning anti-slip and water-stopping device fixed to the bottom of the secondary beams, and a prefabricated prefabricated concrete slab fixed to the top of the positioning anti-slip and water-stopping device; the positioning anti-slip and water-stopping device includes a waterproof component at the bottom, a fastening structure at the top of the waterproof component, and a positioning structure fixed to the top of the waterproof component; the prefabricated prefabricated concrete slab includes a positioning pre-set hole that matches the positioning structure and penetrates the prefabricated prefabricated concrete slab; the fastening structure passes sequentially through the bottom of the secondary beams and the waterproof component; the positioning structure is inserted into the positioning pre-set hole to fix the prefabricated prefabricated concrete slab above the positioning anti-slip and water-stopping device; a corresponding construction method is also disclosed; improving stability, safety, and waterproofness.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and more specifically, to a steel-concrete prefabricated pitched roof construction device and construction method. Background Technology

[0002] In the field of modern architecture, pitched roofs are highly favored for their drainage performance and aesthetic design, becoming an indispensable part of urban and new rural construction. However, the traditional construction process for pitched roofs is complex and presents many challenges. Specifically, the process includes: formwork erection—roof panel reinforcement binding—roof panel concrete pouring—curing—leveling—steel wire mesh reinforced polystyrene sandwich panel—SBS modified bitumen waterproof membrane construction—concrete colored tile installation. While this series of construction steps can create a pitched roof that combines functionality and aesthetics, its unique characteristics also bring significant problems: the slope angle makes the formwork process extremely cumbersome, increasing construction difficulty and extending the construction period; at the same time, the concrete pouring of the roof panel is carried out on a sloping surface, requiring extremely high technical skills and being prone to quality problems; in addition, the entire construction process requires a large amount of manual labor, which is not only inefficient but also leads to high labor costs.

[0003] To address these issues, prefabricated construction has been vigorously promoted and developed. Some existing technologies, through the connection of precast panels and grouting, significantly improve construction efficiency, but they fall short when faced with the large-span cantilevered eaves of large public buildings, limiting their application. Other existing technologies, through the tight assembly of sloping slabs and waterproofing panels, effectively prevent leakage; however, this structure lacks sufficient consideration for slip prevention and long-term stability, still facing the risk of cracking and water seepage. Still other existing technologies provide a prefabricated pitched roof PC component connection device. The PC slabs are precast prefabricated concrete slabs, and the connection and support of the PC slabs are achieved through the combination of strips, rods, connecting columns, and other components. Its flexibility and stability provide strong support for the connection of the PC slabs, significantly enhancing the practicality of the device; however, its solution is still insufficient when facing the challenges of constructing large-span pitched eaves. Summary of the Invention

[0004] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a precast steel-concrete pitched roof construction device and method. By constructing a roof truss structure using precast columns, main beams, and secondary beams, the rigidity of the main and secondary beam structures is enhanced. This successfully overcomes the challenges of designing large-span cantilevered eaves, preventing cracking and water seepage caused by uneven stress on the cantilever structure, and significantly reducing the risk of rainwater erosion, thereby enhancing the structure's durability. Through a multi-bolt connection system, all structural components are tightly and securely connected, improving the stability and safety of the entire device.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a steel-concrete prefabricated pitched roof construction device is provided, comprising several prefabricated columns with one end vertically fixed to the ground, several prefabricated main beams with both ends respectively fixed to the top of two prefabricated columns and parallel to each other, a secondary beam perpendicular to the prefabricated main beams and with both ends respectively fixed to the top of the prefabricated main beams, a positioning anti-slip and water-stopping device fixed to the bottom of the secondary beams, and a prefabricated prefabricated concrete slab fixed to the top of the positioning anti-slip and water-stopping device.

[0006] The positioning anti-slip and water-stopping device includes a waterproof component at the bottom, a fastening structure at the top of the waterproof component, and a long strip-shaped positioning structure fixed to the top of the waterproof component.

[0007] The precast assembled concrete slab includes a positioning preset hole that matches the positioning structure and penetrates the precast assembled concrete slab.

[0008] The fastening structure passes through the bottom of the secondary beam and the waterproof component from top to bottom, fixing the secondary beam and the positioning anti-slip and water-stopping device; by inserting the positioning structure into the positioning preset hole, the precast assembled concrete slab is fixed above the positioning anti-slip and water-stopping device, and the rigidity of the main and secondary beam structure is improved by the roof truss construction structure of the precast columns, precast main beams and secondary beams.

[0009] Furthermore, the precast main beam includes embedded bolts and an embedded structural panel located below the secondary beam; the secondary beam and the embedded structural panel are provided with several holes of the same size, the holes are matched with the embedded bolts, the embedded bolts pass through the secondary beam and the embedded structural panel in sequence and are inserted into the interior of the precast main beam to fix the precast main beam and the secondary beam.

[0010] Furthermore, the precast main beam also includes annular stirrups located at the lower part of the embedded structural panel, a main beam steel structure located in the middle of the stirrups, main reinforcing bars and beam anchor bars located at the gap between the stirrups and the main beam steel structure, with the lower part of the beam anchor bars inserted into the interior of the precast main beam.

[0011] Furthermore, the waterproof component includes a water-stop steel plate and a rubber water-stop strip. The water-stop steel plate, the rubber water-stop strip, and the secondary beam are provided with reserved holes of the same size. The reserved holes are matched with the fastening structure, which is a fastening bolt.

[0012] Furthermore, the precast assembled concrete slab also includes internal embedded steel bars, the length of which is greater than the thickness of the roof waterproofing and insulation layer.

[0013] Furthermore, the precast assembled concrete slab also includes truss steel bars fixedly installed on the upper surface as a supporting structure during the pouring of roof concrete.

[0014] Furthermore, the precast assembled concrete slab also includes a retaining wall fixedly installed on the upper surface, and there are several retaining walls with the same spacing between each retaining wall.

[0015] Furthermore, the bottom of the precast concrete slab has internal corners on the top, bottom, left, and right sides that are adapted to the positioning anti-slip and water-stopping device, wherein the lower part of the cantilever end of the precast concrete slab has no internal corners.

[0016] Furthermore, the lower inner corner of the precast concrete slab matches the upper outer corner of the precast main beam, and the upper inner corner of the precast concrete slab matches the lower outer corner of the previous span of the precast main beam; the contact surface between the precast concrete slab and the outer corner of the precast main beam is padded with a positioning anti-slip and water-stopping device.

[0017] According to a second aspect of the present invention, a method for constructing a prefabricated steel-concrete pitched roof is provided, which is implemented using the prefabricated steel-concrete pitched roof construction device described above, and includes the following steps:

[0018] S1, component prefabrication, standardized prefabrication production of prefabricated columns, prefabricated main beams, positioning anti-slip and water-stopping devices and prefabricated assembled concrete slabs in the factory.

[0019] S2, Install precast columns, position and mark lines, and use machinery to hoist the precast columns to the set positions;

[0020] S3, Install the precast main beam, erect the sloping roof support system, and after acceptance, hoist the precast main beam to the top of the precast column;

[0021] S4. Install the roof panel formwork, inspect the positions of the precast columns and precast main beams, and install the roof panel formwork after they are deemed acceptable.

[0022] S5, fix the precast columns and precast main beams, tie the reinforcing bars of the connecting nodes of the precast columns and precast main beams and weld the steel structure of the precast beam and column nodes. After acceptance, pour the node concrete up to the bottom elevation of the secondary beam and the precast assembled concrete slab. It is necessary to ensure that the exposed embedded structural panels and embedded bolts of the precast main beam match the reserved hole positions of the secondary beam.

[0023] S6, Install the positioning anti-slip and water-stopping device, and temporarily fix the positioning anti-slip and water-stopping device to the upper surface of the structure after it is poured in S5.

[0024] S7, Install the secondary beam, hoist the secondary beam, connect the secondary beam to the pre-embedded structural panel through the pre-embedded bolts, and fix the positioning anti-slip water-stopping device to the secondary beam through the positioning structure;

[0025] S8, Install the precast concrete slabs, hoist the precast concrete slabs layer by layer from bottom to top, and align the positioning preset holes with the positioning structure for hoisting;

[0026] S9, Pouring: After all precast concrete slabs are fixed and installed, the reinforcing bars are tied, concrete is poured, and curing is carried out.

[0027] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0028] 1. The construction device of the present invention improves the rigidity of the main and secondary beam structure by constructing a roof truss structure of precast columns, main beams and secondary beams, successfully overcomes the challenge of large-span cantilever eaves design, prevents cracking and water seepage caused by uneven stress in the cantilever structure, and significantly reduces the risk of rainwater erosion, thereby enhancing the durability of the structure; through a variety of bolt connection systems, the various structural components are tightly and firmly connected together, improving the stability and safety of the entire device.

[0029] 2. The construction device of the present invention solves the problem of easy flow of concrete during the pouring of cast-in-place concrete with pre-embedded steel bars and retaining walls, which leads to poor concrete structure and leakage risks. At the same time, it takes into account the anti-slip requirements of the thermal insulation and waterproof layer on the later structural layer, providing a strong guarantee for the overall quality and durability of the building.

[0030] 3. The construction device of the present invention, supplementing technical means, enhances the waterproof performance of the structure through a positioning anti-slip and water-stopping device.

[0031] 4. The construction device of the present invention reduces the complexity and difficulty of the operation through various prefabricated structures, which not only improves construction efficiency and quality, but also ensures the consistency and stability of product quality. Attached Figure Description

[0032] Figure 1 A roof truss structure diagram provided for a preferred embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the device provided for a preferred embodiment of the present invention;

[0034] Figure 3 Cross-sectional views of the primary and secondary beam nodes provided in a preferred embodiment of the present invention;

[0035] Figure 4 A beam-slab cross-sectional view provided for a preferred embodiment of the present invention;

[0036] Figure 5 Detailed structural diagram of the positioning anti-slip and water-stopping device provided in a preferred embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of a construction method for a prefabricated steel-concrete pitched roof according to an embodiment of the present invention.

[0038] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100-precast column, 200-precast main beam, 210-embedded structural panel, 220-embedded bolt, 230-main reinforcing bar, 240-stirrup, 250-main beam steel structure, 260-beam anchoring bar, 300-secondary beam, 400-positioning anti-slip and water-stopping device, 410-waterproof component, 411-water-stopping steel plate, 412-rubber waterstop, 420-fastening bolt, 430-positioning structure, 500-precast assembled concrete slab, 510-positioning preset hole, 520-sill, 530-embedded reinforcing bar, 540-truss reinforcing bar. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Based on the above problems, this invention is used to solve a series of problems encountered in the construction of prefabricated steel-concrete pitched roofs: ① The cantilevered eaves of prefabricated roofs with large slopes cannot achieve large-span construction and the eaves at the cantilever ends are prone to cracking due to unreasonable stress; ② PC boards are prone to slipping on large slopes and water leakage is easy at the joints between the boards; ③ The cast-in-place concrete layer is prone to flow during the pouring process on large slopes, resulting in a non-dense concrete structure and potential leakage hazards.

[0041] This invention relates to the fields of prefabricated roofing and steel-concrete construction, particularly to the construction of prefabricated roofs with large slopes in large public buildings. It mainly includes PC anti-slip and water-stopping technology for pitched roofs, steel-concrete structure construction for cantilevered eaves of pitched roofs, and construction technology for improving the quality of cast-in-place concrete for large-slope composite slabs.

[0042] This invention is mainly divided into three parts, namely, steel-concrete large-span eaves cantilever construction technology, prefabricated composite slab positioning anti-slip and water-stopping device technology for steep slope roofs, and prefabricated slope roof composite layer concrete pouring quality improvement technology.

[0043] This invention, based on the on-site roof construction sequence, involves sequentially erecting a full-span support frame, installing precast steel-concrete columns and beams and pouring beam-column joints, installing roof PC panels and auxiliary devices, tying reinforcing bars for the cast-in-place layer, and pouring concrete. The invention includes the following:

[0044] First, the precast steel-concrete roof truss system is hoisted and installed. This system includes precast steel-concrete columns, precast steel-concrete main beams, fixed waterproofing devices, and core steel structures for secondary beams. After the precast steel-concrete columns and main beams are hoisted into place, high-strength bolts are used to connect the columns and main beams, as well as the main beams and secondary beams. The reinforcing bars at the connection nodes between the main beams and columns are then tied, and the node concrete is poured up to the elevation of the secondary beams and the bottom of the roof PC slab. At this point, the construction of the steel-concrete roof truss system is completed.

[0045] Next, the anti-slip and water-stopping device for the PC board of the roof is installed. This device is a composite structure of steel plate and rubber waterstop, with fixing bolts and bolt holes distributed on it. After the formwork support frame is constructed, the anti-slip and water-stopping device is temporarily fixed in the predetermined position. After the beam-column connection node reaches the design concrete strength, the main beam overhanging steel structure and the secondary beam steel structure are connected by bolts. At the same time, the anti-slip and water-stopping device is connected to the secondary beam steel structure with bolts.

[0046] Finally, the roof panel system is installed. The PC panels are hoisted, and the bolt holes are aligned with the bolts of the positioning anti-slip and water-stopping devices. The lower inner corner of the PC panel aligns with the upper outer corner of the main beam (the lower inner corner of the PC panel at the cantilever end has no inner corner). After the upper inner corner aligns with the lower outer corner of the adjacent main beam, the PC panel is fixed after the positioning anti-slip and water-stopping devices are applied to the contact surface between the PC panel and the outer corner of the main beam. After all PC panels are fixed and installed, the reinforcing steel is tied and concrete is poured.

[0047] Based on this system, a steel-concrete prefabricated pitched roof construction device and construction method were developed.

[0048] The invention is technically reasonable and feasible, with a simple and convenient structure, fast construction speed, economic feasibility, good overall performance, and energy saving and consumption reduction. This technology can effectively solve problems such as the difficulty in fixing prefabricated large-slope roof composite slabs, water seepage at beam-slab connections, and poor construction quality of cast-in-place concrete.

[0049] Specifically,

[0050] Please refer to Figure 1 and Figure 2 This invention relates to a precast concrete pitched roof construction device, comprising several precast columns 100 with one end vertically fixed to the ground, several precast main beams 200 with both ends fixed to the top of two precast columns 100 and parallel to each other, secondary beams 300 perpendicular to the precast main beams 200 and with both ends fixed to the top of the precast main beams 200, a positioning anti-slip and water-stopping device 400 fixed to the bottom of the secondary beams 300, and a precast precast concrete slab 500 fixed to the top of the positioning anti-slip and water-stopping device 400. The stability of the overall device is ensured by directly stacking and connecting the various structures.

[0051] The positioning anti-slip and water-stopping device 400 includes a bottom waterproof component 410, a fastening structure located on the top of the waterproof component 410, and a long strip-shaped positioning structure 430 fixed on the top of the waterproof component 410.

[0052] The precast concrete slab 500 includes a positioning pre-set hole 510 that matches the positioning structure 430 and penetrates the precast concrete slab 500.

[0053] Please refer to Figure 3 The precast main beam 200 includes embedded bolts 220 and an embedded structural panel 210 located below the secondary beam 300 (providing a flat and stable connection surface so that the secondary beam 300 can accurately connect with the precast main beam 200); the secondary beam 300 and the embedded structural panel 210 are provided with several holes of the same size, the holes and the embedded bolts 220 are matched, the embedded bolts 220 pass through the secondary beam 300 and the embedded structural panel 210 in sequence and are inserted into the interior of the precast main beam 200 to fix the precast main beam 200 and the secondary beam 300.

[0054] Please refer to Figure 4 The precast main beam 200 also includes annular stirrups 240 located at the lower part of the pre-embedded structural panel 210, a main beam steel structure 250 located in the middle of the stirrups 240, a main reinforcing bar 230 located at the gap between the stirrups 240 and the main beam steel structure 250, and a beam anchoring bar 260, with the lower part of the beam anchoring bar 260 inserted into the interior of the precast main beam 200.

[0055] Please refer to Figure 5 The waterproof component 410 includes a water-stop steel plate 411 and a rubber water-stop strip 412. The water-stop steel plate 411, the rubber water-stop strip 412 and the secondary beam 300 are provided with reserved holes of the same size. The reserved holes are matched with the fastening structure, which is a fastening bolt 420.

[0056] Please refer to Figure 2 The precast concrete slab 500 also includes internal embedded steel bars 530, the length of which is greater than the thickness of the roof waterproofing and insulation layer.

[0057] The precast assembled concrete slab 500 also includes truss steel bars 540 fixedly installed on the upper surface as a supporting structure during roof concrete pouring.

[0058] The precast assembled concrete slab 500 also includes retaining sills 520 fixedly installed on the upper surface, and there are several retaining sills 520 with the same spacing between each retaining sill 520.

[0059] The precast concrete slab 500 has internal corners on the bottom, top, left and right sides that are adapted to the positioning anti-slip and water-stopping device 400, but the lower part of the cantilever end of the precast concrete slab 500 has no internal corners.

[0060] The lower internal corner of the precast assembled concrete slab 500 matches the upper external corner of the precast main beam 200, and the upper internal corner of the precast assembled concrete slab 500 matches the lower external corner of the previous span of the precast main beam 200; the contact surface between the precast assembled concrete slab 500 and the external corner of the precast main beam 200 is padded with a positioning anti-slip and water-stopping device 400.

[0061] During operation, the fastening structure passes through the lower part of the secondary beam 300 and the waterproof component 410 from top to bottom, fixing the secondary beam 300 and the positioning anti-slip and water-stopping device 400; by inserting the positioning structure 430 into the positioning preset hole 510, the precast assembled concrete slab 500 is fixed above the positioning anti-slip and water-stopping device 400, and the rigidity of the main and secondary beam structure is improved by the roof truss construction structure of the precast column 100, the precast main beam 200 and the secondary beam 300.

[0062] like Figure 6 As shown, as another aspect of the present invention, a construction method for a prefabricated steel-concrete pitched roof construction device is also provided, comprising the following steps:

[0063] S1, component prefabrication, standardized prefabrication production of prefabricated columns 100, prefabricated main beams 200, positioning anti-slip and water-stopping devices 400 and prefabricated assembled concrete slabs 500 in the factory.

[0064] S2, Install the precast column 100, position and mark the lines, and use machinery to hoist the precast column 100 to the set position;

[0065] S3, install the precast main beam 200, erect the sloping roof support system, and after acceptance, hoist the precast main beam 200 to the upper part of the precast column 100;

[0066] S4. Install the roof panel template, inspect the positions of the precast columns 100 and precast main beams 200, and install the roof panel template after they are deemed acceptable.

[0067] S5, fix the precast column 100 and the precast main beam 200, tie the reinforcing bars of the connecting nodes of the precast column 100 and the precast main beam 200 and weld the steel structure of the precast beam and column node. After acceptance, pour the node concrete up to the bottom elevation of the secondary beam 300 and the precast assembled concrete slab 500. It is necessary to ensure that the exposed embedded structural panel 210 and embedded bolt 220 of the precast main beam 200 match the reserved hole position of the secondary beam 300.

[0068] S6, Install the positioning anti-slip water-stopping device 400, and temporarily fix the positioning anti-slip water-stopping device 400 on the upper surface of the structure after it is poured in S5.

[0069] S7, Install the secondary beam 300, hoist the secondary beam 300, connect the secondary beam 300 to the pre-embedded structural panel 210 through the pre-embedded bolts 220, and fix the positioning anti-slip water-stopping device 400 to the secondary beam 300 through the positioning structure 430.

[0070] S8, Install the precast concrete slab 500, hoist the precast concrete slab 500 layer by layer from bottom to top, and align the positioning preset hole 510 with the positioning structure 430 for hoisting.

[0071] S9, Pouring: After all precast concrete slabs are fixed and installed, the reinforcing bars are tied, concrete is poured, and curing is carried out.

[0072] Those skilled in the art will readily understand that the above description is merely 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 within the scope of protection of the present invention.

Claims

1. A prefabricated steel-concrete pitched roof construction device, characterized in that, It includes several precast columns (100) with one end vertically fixed to the ground, several precast main beams (200) with both ends fixed to the top of the two precast columns (100) and parallel to each other, secondary beams (300) perpendicular to the precast main beams (200) and with both ends fixed to the top of the precast main beams (200), positioning anti-slip and water-stopping devices (400) fixed to the bottom of the secondary beams (300), and precast assembled concrete slabs (500) fixed to the top of the positioning anti-slip and water-stopping devices (400). The positioning anti-slip and water-stopping device (400) includes a bottom waterproof component (410), a fastening structure located on the top of the waterproof component (410), and a long strip-shaped positioning structure (430) fixed on the top of the waterproof component (410). The precast concrete slab (500) includes a positioning pre-set hole (510) that matches the positioning structure (430) and penetrates the precast concrete slab (500). The fastening structure passes through the bottom of the secondary beam (300) and the waterproof component (410) from top to bottom, fixing the secondary beam (300) and the positioning anti-slip water-stopping device (400); by inserting the positioning structure (430) into the positioning preset hole (510), the precast assembled concrete slab (500) is fixed above the positioning anti-slip water-stopping device (400), and the rigidity of the main and secondary beam structure is improved by the roof truss construction structure of the precast column (100), precast main beam (200) and secondary beam (300); The waterproof component (410) includes a water-stop steel plate (411) and a rubber water-stop strip (412). The water-stop steel plate (411), the rubber water-stop strip (412) and the secondary beam (300) are provided with reserved holes of the same size. The reserved holes are matched with the fastening structure, which is a fastening bolt (420).

2. The prefabricated steel-concrete pitched roof construction device according to claim 1, characterized in that, The precast main beam (200) includes embedded bolts (220) and embedded structural panels (210) located below the secondary beam (300); the secondary beam (300) and the embedded structural panels (210) are provided with several holes of the same size, the holes and the embedded bolts (220) are matched, the embedded bolts (220) pass through the secondary beam (300) and the embedded structural panels (210) in sequence and are inserted into the interior of the precast main beam (200) to fix the precast main beam (200) and the secondary beam (300).

3. The prefabricated steel-concrete pitched roof construction device according to claim 2, characterized in that, The precast main beam (200) also includes annular stirrups (240) located at the lower part of the embedded structural panel (210), a main beam steel structure (250) located in the middle of the stirrups (240), a main reinforcing bar (230) located at the gap between the stirrups (240) and the main beam steel structure (250), and a beam anchor bar (260), the lower part of which is inserted into the interior of the precast main beam (200).

4. The prefabricated steel-concrete pitched roof construction device according to any one of claims 3, characterized in that, The precast assembled concrete slab (500) also includes internal embedded steel bars (530), the length of which is greater than the thickness of the roof waterproof and thermal insulation layer.

5. The prefabricated steel-concrete pitched roof construction device according to claim 4, characterized in that, The precast assembled concrete slab (500) also includes truss steel bars (540) fixedly installed on the upper surface as a supporting structure during the pouring of roof concrete.

6. The prefabricated steel-concrete pitched roof construction device according to claim 5, characterized in that, The precast assembled concrete slab (500) also includes a retaining wall (520) fixedly installed on the upper surface. There are several retaining walls (520) and the spacing between each retaining wall (520) is the same.

7. The prefabricated steel-concrete pitched roof construction device according to claim 6, characterized in that, The precast assembled concrete slab (500) has internal corners on the bottom, top, left and right sides that are adapted to the positioning anti-slip and water-stopping device (400), wherein the lower part of the cantilever end of the precast assembled concrete slab (500) has no internal corners.

8. The prefabricated steel-concrete pitched roof construction device according to claim 7, characterized in that, The lower inner corner of the precast assembled concrete slab (500) matches the upper outer corner of the precast main beam (200), and the upper inner corner of the precast assembled concrete slab (500) matches the lower outer corner of the previous span precast main beam (200); the contact surface between the precast assembled concrete slab (500) and the outer corner of the precast main beam (200) is padded with a positioning anti-slip and water-stopping device (400).

9. A method for constructing a prefabricated steel-concrete pitched roof, characterized in that, The application of the precast steel-concrete pitched roof construction device as described in claim 8 includes the following steps: S1, component prefabrication, standardized prefabrication production of prefabricated columns (100), prefabricated main beams (200), positioning anti-slip water-stopping devices (400) and prefabricated assembled concrete slabs (500) in the factory. S2, install the precast column (100), position and lay out the lines, and use machinery to hoist the precast column (100) to the set position; S3, install the precast main beam (200), erect the sloping roof support system, and after acceptance, hoist the precast main beam (200) to the upper part of the precast column (100); S4, Install the roof panel template, inspect the position of the precast columns (100) and precast main beams (200), and install the roof panel template after passing the inspection; S5, fix the precast column (100) and the precast main beam (200), tie the reinforcing bars of the connection node of the precast column (100) and the precast main beam (200) and weld the steel structure of the precast beam and column node, and after acceptance, pour the node concrete up to the bottom elevation of the secondary beam (300) and the precast assembled concrete slab (500); ensure that the pre-embedded structural panel (210) and pre-embedded bolts (220) exposed on the precast main beam (200) match the reserved hole position of the secondary beam (300); S6, Install the positioning anti-slip water-stopping device (400) and temporarily fix the positioning anti-slip water-stopping device (400) on the upper surface of the structure after it is poured in S5; S7, Install the secondary beam (300), hoist the secondary beam (300), connect the secondary beam (300) to the pre-embedded structural panel (210) through the pre-embedded bolts (220), and fix the positioning anti-slip water-stopping device (400) to the secondary beam (300) through the positioning structure (430); S8, install the precast assembled concrete slab (500), hoist the precast assembled concrete slab (500) layer by layer from bottom to top, and align the positioning preset hole (510) with the positioning structure (430) for hoisting. S9, Pouring: After all precast concrete slabs (500) are fixed and installed, the reinforcing bars are tied, concrete is poured and cured.

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