High-strength film greenhouse mounting method based on standardized precise control

Abstract

The invention discloses a high-strength film greenhouse installation method based on standardized precise control, and belongs to the technical field of film greenhouse installation, and the method comprises the steps: S1, executing a set of standardized installation processes, including foundation positioning and construction, steel structure installation, environmental control system integration, electrical system installation and overall debugging operation; s2, in the step S1, quantitative precision control is carried out on key construction links, and the key construction links at least comprise foundation engineering, steel structure assembling and positioning and installation and calibration of environment control equipment; and S3, in the process of the step S1, building materials of standard specifications and a standardized mechanical connection mode are adopted in a unified mode, and the overall strength and design durability of the greenhouse structure are guaranteed. The combined load of 0.55 kN / m wind pressure and 0.20 kN / m snow pressure can be borne, the designed service life is larger than or equal to 15 years, the drainage capacity is larger than or equal to 140 mm / h, and the thin film greenhouse is particularly suitable for a thin film greenhouse with the span being 6-8 m and the shoulder height being 3.0-4.0 m and has the advantages of being high in structural strength, good in installation precision, long in service life and excellent in environment control.

Description

Technical Field

[0001] This invention relates to the field of film greenhouse installation technology, and specifically to a high-strength film greenhouse installation method based on standardized and precise control. Background Technology

[0002] Film greenhouses are one of the core infrastructures of modern agriculture, and their construction quality directly determines structural safety, environmental control precision, and service life. Current mainstream installation methods largely rely on the experience of on-site personnel, lacking systematic technical specifications and process control, resulting in the following common technical defects: The process is rough and the precision is out of control: from foundation excavation to equipment installation, the connection between each process is loose, and key dimensions (such as foundation elevation, column verticality, and gutter straightness) lack quantitative control standards, resulting in large cumulative errors that affect the structural stress and sealing performance. Non-standard materials and processes: Inconsistent standards for corrosion protection of steel components and non-standard connection methods (such as arbitrary welding instead of bolt connections) significantly reduce the corrosion resistance and connection reliability of the structure. Low system integration: The installation locations and precision of environmental control equipment (ventilation, shading, cooling) are inconsistent, and the coordination between subsystems is poor, making it difficult to achieve stable and uniform indoor environmental control.

[0003] These defects often result in existing greenhouses having weak resistance to wind and snow (deformation or damage under design load), water leakage, early corrosion of components, high equipment failure rate, and high energy consumption, with an average service life far below the design expectation.

[0004] To address the aforementioned issues, while existing greenhouse design standards exist, they primarily focus on structural design calculations and material selection, lacking a comprehensive installation process that can be applied throughout the entire construction process, translating design parameters into controllable and quantifiable on-site acceptance methods. Therefore, developing an installation method that integrates standardized processes, quantitative precision control, and systematic integration is of great significance for improving the overall performance and industry level of film greenhouses. Summary of the Invention

[0005] The purpose of this invention is to provide a high-strength film greenhouse installation method based on standardized and precise control, so as to solve the problems of rough installation process, uncontrollable quality and substandard system performance in the existing technology.

[0006] Technical solution: This invention provides a high-strength film greenhouse installation method based on standardized and precise control, comprising: S1. Implement a standardized installation process, which includes foundation positioning and construction, steel structure installation, environmental control system integration, electrical system installation, and overall commissioning and operation. S2. In each process of step S1, quantitative precision control is implemented for key construction links. The key construction links include at least foundation engineering, steel structure assembly and positioning, and installation and calibration of environmental control equipment. S3. Throughout step S1, standard-specification building materials and standardized mechanical connection methods are used to ensure the overall strength and design durability of the greenhouse structure.

[0007] Furthermore, in the aforementioned high-strength film greenhouse installation method based on standardized and precise control, the foundation positioning and construction steps in S1 specifically include: Conduct measurements and lay out the lines according to the design drawings to determine the foundation location; Excavate the foundation pit to ensure that the foundation depth is not less than 0.8 meters, and that the outdoor foundation depth is greater than the local frost depth. The independent foundation and the ring beam with a cross-sectional dimension of 200mm×200mm are constructed by cast-in-place reinforced concrete, and the concrete strength grade is not lower than C25. A two-way drainage slope of not less than 2.5‰ is set on the top surface of the foundation along the direction of the greenhouse gutter.

[0008] Furthermore, in the above-mentioned high-strength film greenhouse installation method based on standardized and precise control, the steel structure installation step in S1 specifically includes: The greenhouse columns are securely connected to the concrete foundation using pre-embedded bolts; Install gutters and control the straightness deviation after installation to be no more than 1 / 2000 of the length of the installation section, and the maximum deviation over the entire length shall not exceed 25mm; Install the supporting components of the external sunshade system and control their verticality deviation to be no more than 10mm and their parallelism deviation to be no more than 15mm.

[0009] Furthermore, in the above-mentioned high-strength film greenhouse installation method based on standardized precision control, the installation precision control of the shading system in the environmental control system integration step of S1 includes: The straightness deviation of the drive shaft installation shall not exceed 20mm; The installation spacing deviation of the gear and rack shall not exceed 10mm; After the sunshade curtain is unfolded, the gap between the curtain closures shall not exceed 15mm; the spacing between the curtain support lines shall not exceed 0.5m; and the spacing between the curtain pressing lines shall not exceed 1.0m.

[0010] Furthermore, in the above-mentioned high-strength film greenhouse installation method based on standardized precision control, the electrical system installation steps in S1 are required to include: The electrical control system equipment complies with the requirements of JB / T 10296 and JB / T 10306 standards; The grounding resistance of the protective grounding system shall not exceed 4 ohms, and it shall be equipped with three-level power distribution and two-level leakage protection. All power cables and control cables must be laid in insulated conduits or metal cable trays.

[0011] Furthermore, in the above-mentioned high-strength film greenhouse installation method based on standardized precision control, the ventilation system installation in the environmental control system integration step of S1 includes: Ventilation openings with a width of 0.8 to 1.5 meters are made on the roof of the greenhouse. The lower edge of the ventilation opening is 0.3 to 0.5 meters away from the gutter. Insect-proof nets or water-proof nets are installed in the ventilation openings, and pressure film lines are installed above them. Ventilation openings with a height of 1.5 to 1.8 meters are made on the side wall of the greenhouse. The lower edge of the ventilation opening is 0.3 to 0.5 meters away from the indoor ground. Insect-proof nets or water-proof nets are installed in the ventilation openings, and pressure film lines are installed on the outside of the ventilation openings.

[0012] Furthermore, in the above-mentioned high-strength film greenhouse installation method based on standardized and precise control, the overall commissioning and operation steps in S1 include: Start and connect all electromechanical equipment in parallel to check their coordinated operation status; Simulated rainfall was used to test and verify that the drainage capacity of the gutter system was no less than 140 mm / hour. A comprehensive inspection was conducted to ensure the secure and reliable installation of all steel structure connection points, mechanical transmission connection points, and electrical wiring.

[0013] Furthermore, in the above-mentioned high-strength film greenhouse installation method based on standardized and precise control, the standard-specification building materials include: The main steel components are made of Q235B carbon structural steel and are hot-dip galvanized with an average zinc layer thickness of not less than 0.045mm. The pre-embedded bolts used for structural connections shall be no smaller than M14, and the number of pre-embedded bolts used for each connection node shall be no less than 2. The power transmission rods of the curtain system shall have an outer diameter of not less than 32mm and a wall thickness of 1.5mm.

[0014] Furthermore, the aforementioned high-strength film greenhouse installation method based on standardized and precise control, through the execution of the standardized installation process and quantitative control, enables the constructed film greenhouse to achieve the following structural performance indicators: The basic design wind pressure shall not be less than 0.55 kN / m²; The basic snow load design should be no less than 0.20 kN / m². The drainage capacity of the gutter shall not be less than 140 mm / h.

[0015] Furthermore, in the above-mentioned high-strength film greenhouse installation method based on standardized and precise control, the standard-specification building materials also include a covering film. The covering film is made of polyethylene (PE) or ethylene-vinyl acetate copolymer (EVA), with a thickness of not less than 0.15 mm, and has anti-drip and anti-ultraviolet functions.

[0016] As can be seen from the above technical solution, the present invention has the following beneficial effects: The high-strength film greenhouse installation method based on standardized and precise control described in this invention transforms abstract design requirements into specific control values ​​during construction, making the installation quality measurable and traceable, fundamentally ensuring that the final structural performance meets or exceeds the design target; the standardized process reduces construction decision-making time and rework rate, and quantitative control reduces excessive reliance on the experience of individual technicians, which is expected to improve overall construction efficiency by more than 30% and reduce long-term maintenance costs; unified anti-corrosion standards and standardized connection processes effectively delay the corrosion of the main structure, improve the fatigue strength of connection nodes, and significantly enhance the durability of the greenhouse under harsh climates; high-precision system integration ensures that environmental control equipment operates in the optimal design state, improves the control accuracy and uniformity of environmental factors such as temperature, light, water, and air, which is beneficial to crop growth and reduces operating energy consumption. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating a high-strength film greenhouse installation method based on standardized and precise control according to the present invention. Figure 2 This is a plan view of the foundation of the film greenhouse of this invention; Figure 3 This is a schematic diagram of the on-site concrete pouring process for this invention. Figure 4 This is a schematic diagram of the ring beam and drainage slope of the present invention; Figure 5 This is a table for controlling the installation accuracy of steel structures according to the present invention. Detailed Implementation

[0018] Example 1 like Figure 1 The method for installing a high-strength film greenhouse based on standardized and precise control, as shown, includes: S1. Implement a standardized installation process, which includes foundation positioning and construction, steel structure installation, environmental control system integration, electrical system installation, and overall commissioning and operation. S2. In each process of step S1, quantitative precision control is implemented for key construction links. The key construction links include at least foundation engineering, steel structure assembly and positioning, and installation and calibration of environmental control equipment. S3. Throughout step S1, standard-specification building materials and standardized mechanical connection methods are used to ensure the overall strength and design durability of the greenhouse structure.

[0019] like Figures 2-4 The method for installing a high-strength film greenhouse based on standardized and precise control, shown in step S1, specifically includes the following steps: S101 Surveying and Setting Out: Using high-precision instruments such as total stations, surveying is conducted according to the overall plan to accurately mark the center lines and edge lines of each independent foundation and ring beam. Benchmark stakes are set up and protected as the origin for dimensional control throughout the entire process. S102 Foundation Pit Excavation and Treatment: When mechanical excavation reaches approximately 200mm above the design elevation, manual cleaning and leveling are switched to manual excavation. A heavy-duty rammer is then used to compact the foundation soil at the bottom of the pit, achieving a compaction coefficient of not less than 0.94. Subsequently, a graded crushed stone cushion layer of the design thickness (e.g., 100mm) is laid and compacted again. S103 Formwork and Reinforcement Engineering: Erect foundation formwork, ensuring accurate dimensions and firmness. Tie the reinforcing cage, ensuring that the specifications, quantity, and spacing of the main reinforcement (≥4Φ12) and stirrups (Φ6@200) meet the design requirements; Key control points: Precisely install pre-embedded bolt groups (≥M14), using standardized steel molds to fix the bolts, ensuring that their planar position deviation is ≤3mm, elevation deviation is ≤5mm, and verticality deviation is ≤1%; S104 concrete construction: Pour C25 or higher strength commercial concrete, and compact it in layers with vibration; after pouring, the top surface of the foundation needs to be initially sloped using a screed and a level to ensure that the drainage slope along the gutter direction is ≥2.5‰ (i.e., raised by no less than 2.5mm per meter), and covered for curing for no less than 7 days. S105 Ring Beam and Drainage: Concrete ring beams with a cross section of 200mm×200mm are constructed using the same method. After the strength meets the standard, drainage is constructed on the outside: width ≥500mm, slope ≥5‰ (approximately 1:200), concrete thickness ≥80mm, and surface compacted and smoothed.

[0020] Example 2 In this embodiment, the steel structure installation in S1 is used to construct a high-precision, high-strength spatial framework, and is implemented using standardized and quantitative control, including: S201 Column hoisting and alignment: Use a crane to position the hot-dip galvanized (zinc layer ≥ 0.045 mm) column, insert the pre-embedded bolts, and initially tighten the nuts; Key control points: Immediately use two theodolites to align the column verticality in a 90° direction; Adjust with shims until the verticality deviation is ≤ 10 mm (i.e., the column top offset at a height of 3 meters is ≤ 10 mm), and immediately tighten the bolts to the design torque after alignment; S202 Gutter Installation and Sealing: Segmented hoisting of gutters; Key control points: During installation, use a tensioned engineering line or laser level to check the straightness of the upper edge of the gutter. The straightness deviation between any two points should be ≤L / 2000 (L is the length of the measured segment), and the total deviation along the length of the entire greenhouse should be ≤25mm. At the joint of the gutter, the inner side of the gutter and the gutter frame should be sealed with butyl waterproof tape, and the outer side should be fastened with bolts. S203 Arch and Support System Installation: Install roof arches and horizontal and diagonal support members (tied rods); Key control points: After the arches are installed, check the flatness of the arch surface formed by them. Measure using the string line method; the deviation should be ≤15mm; Tied rod connections must use the necked sleeve or inner sleeve bolt connection specified in the design to ensure continuous force flow; All connection points between arches and tied rods / supports must use standard spring clips, special galvanized clamps, or bolts, and check that they are properly locked.

[0021] like Figure 5 The method for installing a high-strength film greenhouse based on standardized and precise control is illustrated. Based on the aforementioned standardized installation process, to ensure the construction results accurately meet the design intent, a complete and quantified structural precision control standard is implemented during the installation and acceptance phases. This standard specifies clear allowable deviation ranges and corresponding inspection methods for the key geometric dimensions and form and position tolerances of the greenhouse frame, representing a concrete manifestation of the "precise control" concept in the quality acceptance stage. Specific control items, deviation limits, and inspection methods are as follows: 1. Column installation accuracy control: As the main vertical load-bearing component, the installation accuracy of the column is crucial; verticality of the axis (Δ): the allowable deviation is no more than 10mm. During inspection, a theodolite or plumb bob and steel ruler are used for measurement; Centerline alignment accuracy: The allowable deviation (Δ) between the column centerline and the predetermined axis of the foundation top surface shall not exceed 10mm. The inspection method is to use a string line and steel ruler for verification. 2. Roofing system installation precision control: The precision of the roofing system directly affects the integrity and sealing performance of the structure; Verticality of arch members (Δ): After installation, the verticality deviation of each arch member on its plane should not exceed 10mm. This should be checked using a theodolite or a string line with a steel ruler. Arch spacing uniformity: The allowable deviation of the spacing (s) between any two adjacent arches on the greenhouse roof is ±10mm. During inspection, at least three sets of measuring points should be selected near key control areas such as the ridge and gutters, and measurements should be taken using a steel ruler or laser rangefinder. Straightness of gutters (Δ): After installation, gutters must remain straight. The straightness deviation should not exceed 1 / 2000 of the length (A) of the slope section where the gutter is located, and the maximum absolute value should not exceed 25mm. The inspection method is to set up no less than three measuring points along each gutter slope section, pull a line, and measure the deviation with a steel ruler. Overall flatness of the roof (Δ): The entire roof should be flat, and its overall flatness (straightness) deviation should not exceed 1 / 500 of the length (A) of the greenhouse sidewall, and the maximum deviation should not exceed 30mm. During acceptance, at least three lines should be drawn for inspection on each roof.

[0022] 3. Overall Dimensional Accuracy Control of Greenhouse: The macroscopic dimensions of the greenhouse are the foundation for ensuring the design functions and spatial requirements; Total Length A: The allowable deviation for the overall length of the greenhouse along the sidewalls is ±25mm. During inspection, two sets of measuring points are taken at the lower and upper parts of the two side columns, respectively, and measurements are taken using a steel ruler or laser rangefinder. Local dimensions: The allowable deviation for the dimension of any single bay (a) is ±10mm; the allowable deviation for the dimension of any span of the greenhouse (b) is ±10mm; Key heights: The allowable deviation for the greenhouse roof height (H) is ±10mm. Select no fewer than 3 measuring points on the end faces of both gable walls (if less than 3 points, measure all points) and use a steel ruler or laser rangefinder for measurement; the allowable deviation for the greenhouse shoulder height (h) is ±5mm. The measurement method is the same as for the roof height measurement.

[0023] Example 3 In this embodiment, the standardized and quantitative control implementation of the environmental control system integrated in S1 enables efficient, precise, and coordinated operation of each subsystem, including: After installing the S301 curtain (shading / insulation) system, check the smoothness of the drive shaft after installation. Use a string line method to measure the straightness of the entire length of the drive shaft, and adjust the position of the support bearing seat to ensure the deviation is ≤20mm. Install the drive motor and gears, and adjust the meshing clearance between the rack and gears to make it uniform, with a deviation of ≤10mm along the entire length of the rack spacing (distance from the center line of the rack to the center line of the push rod). Lay the curtain; after the curtain is unfolded, the closing gap must be adjusted to ≤15mm. Tension the curtain support lines (spacing ≤0.5m) and curtain pressure lines (spacing ≤1.0m) according to the design to ensure the curtain runs flat without sagging.

[0024] For the S302 ventilation system installation, install iron or aluminum alloy slots at the roof ventilation openings according to the design dimensions (0.8-1.5m wide), ensuring that the distance between the lower edge of the slot and the gutter is controlled within 0.3-0.5m. Securely install ≥25 mesh insect-proof netting or water-proof netting on the inside, and install a pressure line above it. For side wall ventilation openings, use the same method to create side windows (1.5-1.8m high), install insect-proof netting or water-proof netting at the ventilation openings, and install a pressure line on the outside of the ventilation openings to prevent the membrane from detaching under wind force. For the S303 evaporative cooling system, install an evaporative cooling box on one side of the greenhouse wall. The thickness of the evaporative cooling pads must be ≥10cm, and the height of the evaporative cooling pads must be ≥1.8m. The installation height should be higher than the crops. The water supply pipeline should ensure that the evaporative cooling pads are evenly moistened. Install an exhaust fan on the opposite side wall. Verify the fan model and ensure that its rated air volume is ≥38,000 m³ / h. Also install the matching protective net and rain shield.

[0025] Example 4 In this embodiment, the installation of the electrical system in S1 is fundamental to ensuring automated operation and includes the following steps: S401 electrical control cabinet installation: Install a greenhouse-specific electrical control cabinet that conforms to JB / T 10296 and JB / T 10306 standards, perform system grounding, and use a grounding resistance tester to measure to ensure that the grounding resistance is ≤4Ω. The cabinet is equipped with circuit breakers and residual current devices according to the principle of "three-level power distribution and two-level protection". All power lines (such as BV and YJV models) and control lines (such as RVV and RVVP models) under S402 must be run through flame-retardant PVC pipes or galvanized steel pipes, or laid in metal cable trays. The pipelines must be firmly fixed and run horizontally and vertically.

[0026] In this embodiment, the overall debugging and operation in S1 specifically includes: S501 system no-load linkage debugging: Power on and test all motors (film roller, curtain motor, fan, water pump, etc.) in manual and automatic modes in sequence to check whether their running direction, speed, and limit are normal, and whether the logic linkage of each subsystem is correct. S502 performance verification: 1. Drainage test: Using fire hoses or artificial rain equipment, simulate rainfall intensity of ≥140mm / h, continuously spray until the gutter is full, check whether the gutter joints and downpipes are leaking, and whether the drainage is smooth and without water accumulation; 2. Structural re-inspection: Use a torque wrench to randomly check the tightening torque of key connecting bolts, and recheck the main geometric tolerances. S503 As-built documentation archives organize and compile as-built files containing all key control point measurement records (such as foundation elevation, verticality, and straightness records), material qualification certificates, and equipment commissioning reports, enabling quality traceability.

[0027] It should be noted that the above description is merely a technical solution of the invention and not a limitation. Although the invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the invention without departing from the scope of the invention, and all such modifications and substitutions should be covered within the scope of the claims of the invention.

Claims

1. A method for installing a high-strength film greenhouse based on standardized and precise control, characterized in that: Includes the following steps: S1. Implement a standardized installation process, which includes foundation positioning and construction, steel structure installation, environmental control system integration, electrical system installation, and overall commissioning and operation. S2. In each process of step S1, quantitative precision control is implemented for key construction links. The key construction links include at least foundation engineering, steel structure assembly and positioning, and installation and calibration of environmental control equipment. S3. Throughout step S1, standard-specification building materials and standardized mechanical connection methods are used to ensure the overall strength and design durability of the greenhouse structure.

2. The method for installing a high-strength film greenhouse based on standardized precision control according to claim 1, characterized in that: The specific steps for foundation positioning and construction in S1 include: Conduct measurements and lay out the lines according to the design drawings to determine the foundation location; Excavate the foundation pit to ensure that the foundation depth is not less than 0.8 meters, and that the outdoor foundation depth is greater than the local frost depth. The independent foundation and the ring beam with a cross-sectional dimension of 200mm×200mm are constructed by cast-in-place reinforced concrete, and the concrete strength grade is not lower than C25. A two-way drainage slope of not less than 2.5‰ is set on the top surface of the foundation along the direction of the greenhouse gutter.

3. The method for installing a high-strength film greenhouse based on standardized precision control according to claim 1, characterized in that: The steel structure installation steps in S1 specifically include: The greenhouse columns are securely connected to the concrete foundation using pre-embedded bolts; Install gutters and control the straightness deviation after installation to be no more than 1 / 2000 of the length of the installation section, and the maximum deviation over the entire length shall not exceed 25mm; Install the supporting components of the external sunshade system and control their verticality deviation to be no more than 10mm and their parallelism deviation to be no more than 15mm.

4. The method for installing a high-strength film greenhouse based on standardized and precise control according to claim 1, characterized in that: The installation accuracy control of the sunshade system in the environmental control system integration step of S1 includes: The straightness deviation of the drive shaft installation shall not exceed 20mm; The installation spacing deviation of the gear and rack shall not exceed 10mm; After the sunshade curtain is unfolded, the gap between the curtain closures shall not exceed 15mm; the spacing between the curtain support lines used to support the curtain shall not exceed 0.5m; and the spacing between the curtain pressing lines used to press the curtain together shall not exceed 1.0m.

5. The method for installing a high-strength film greenhouse based on standardized precision control according to claim 1, characterized in that: The electrical system installation steps in S1 include: The electrical control system equipment complies with the requirements of JB / T 10296 and JB / T 10306 standards; The grounding resistance of the protective grounding system shall not exceed 4 ohms, and it shall be equipped with three-level power distribution and two-level leakage protection. All power cables and control cables must be laid in insulated conduits or metal cable trays.

6. The method for installing a high-strength film greenhouse based on standardized precision control according to claim 1, characterized in that: The ventilation system installation in the environmental control system integration step of S1 includes: Ventilation openings with a width of 0.8 to 1.5 meters are made on the roof of the greenhouse. The lower edge of the ventilation opening is 0.3 to 0.5 meters away from the gutter. Insect-proof nets or water-proof nets are installed in the ventilation openings, and pressure film lines are installed above them. Ventilation openings with a height of 1.5 to 1.8 meters are made on the side wall of the greenhouse. The lower edge of the ventilation opening is 0.3 to 0.5 meters away from the indoor ground. Insect-proof nets or water-proof nets are installed in the ventilation openings, and pressure film lines are installed on the outside of the ventilation openings.

7. The method for installing a high-strength film greenhouse based on standardized precision control according to claim 1, characterized in that: The overall debugging and operation steps in S1 include: Start and connect all electromechanical equipment in parallel to check their coordinated operation status; Simulated rainfall was used to test and verify that the drainage capacity of the gutter system was no less than 140 mm / hour. A comprehensive inspection was conducted to ensure the secure and reliable installation of all steel structure connection points, mechanical transmission connection points, and electrical wiring.

8. The high-strength film greenhouse installation method based on standardized precision control according to claim 1, characterized in that: The standard specifications of building materials include: The main steel components are made of Q235B carbon structural steel and are hot-dip galvanized with an average zinc layer thickness of not less than 0.045mm. The pre-embedded bolts used for structural connections shall be no smaller than M14, and the number of pre-embedded bolts used for each connection node shall be no less than 2. The power transmission rods of the curtain system shall have an outer diameter of not less than 32mm and a wall thickness of 1.5mm.

9. The high-strength film greenhouse installation method based on standardized precision control according to claim 1, characterized in that: By implementing the standardized installation process and quantitative control, the constructed film greenhouse achieves the following structural performance indicators: The basic design wind pressure shall not be less than 0.55 kN / m²; The basic snow load design should be no less than 0.20 kN / m². The drainage capacity of the gutter shall not be less than 140 mm / h.

10. The method for installing a high-strength film greenhouse based on standardized precision control according to claim 8, characterized in that: The standard building materials also include a covering film, which is made of polyethylene (PE) or ethylene-vinyl acetate copolymer (EVA), has a thickness of not less than 0.15 mm, and has anti-drip and UV-resistant functions.

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