The installation quality of parking lot gully gratings is directly related to drainage efficiency, traffic safety, and service life. Combined with the needs of high-frequency vehicle rolling and large-flow drainage, four core aspects must be focused on: load-bearing matching, installation accuracy, sealing and leakage prevention, and safety protection.

I. Pre-installation Preparation: Precise Matching and Foundation Inspection

1. Specification and load-bearing matching: Select the load-bearing grade according to the vehicle type. Light-duty (≥2.5kN) or medium-duty (≥10kN) gratings are used for small parking lots, and heavy-duty (≥25kN) for truck parking lots; ensure the grating size fits the gully opening, with a 2-3cm installation gap reserved.

2. Foundation inspection: Ensure the concrete base around the gully opening is flat and solid, and repair cracks and settlements; clean up debris and accumulated water, and verify that the drainage ditch slope is ≥1%.

3. Tools and auxiliary materials: Prepare tools such as tape measures and levels, and anti-corrosion auxiliary materials such as stainless steel bolts and sealants.

II. Core Installation: Standard Operation for Stability

1. Positioning and laying: Locate according to the design drawings, place the grating stably, calibrate with a level to ensure the top surface is flush with the ground, with an error ≤2mm, and eliminate protrusions or depressions.

2. Fixing and anti-loosening: Tighten bolts diagonally; add anti-skid gaskets and locknuts in heavy-vehicle areas; ensure the bolt top is flush with the grating to avoid scratching tires.

3. Sealing and leakage prevention: Apply waterproof sealant evenly at the gaps; use oil-resistant sealant in areas with oil pollution risks, and add anti-leakage gaskets inside if necessary.

III. Special Scenario Handling: Adapting to Complex Working Conditions

1. Ramp entrances and curves: Use gratings with thickened frames, increase the density of fixed points, and install anti-collision strips on the edges to reduce impact damage.

2. Low-lying waterlogged areas: Increase the density of drainage ditches, use gratings with large gaps (≥20mm) to improve drainage efficiency, and install them 1-2mm lower than the ground to form a water collection slope.

3. Winter freezing areas: Use gratings with anti-skid patterns, reserve deicing agent feeding ports under the gratings, and ensure smooth drainage to prevent freezing and expansion damage.

IV. Acceptance and Protection: Building a Solid Safety Line

1. Acceptance: Check the flatness and firmness of the grating, ensuring no hollow sound when tapped; conduct light-vehicle rolling tests to ensure no deformation or displacement; simulate rainfall with water spraying to ensure no water accumulation.

2. Protection: Set warning signs and temporary guardrails in unfinished areas or where gratings are temporarily removed; mark the load-bearing grade on the gratings to prohibit overloaded rolling.

3. Maintenance tips: Regularly clean debris from gaps; inspect fasteners and sealants annually, and replace damaged parts in a timely manner.

Following the above points can ensure that the gully gratings achieve efficient drainage, safe traffic, and long durability, adapting to the high-frequency traffic and complex drainage needs of parking lots.