How to Prevent Edge and Corner Damage When Transporting UHPC Components?

Preventing edge and corner damage during UHPC component transportation requires systematic control across four key stages: packaging protection, stacking methods, transport vehicles, and loading/unloading operations. Qinglong has developed a full-process solution of "customized packaging + standardized stacking + dedicated transport + careful handling", keeping the component transportation damage rate below 0.1%, and successfully ensuring the safe transport of components for projects such as Shanghai New World Plaza and Yangshengtang Hangzhou Industrial Park.

1. Packaging Protection: The Core Barrier for Edges and Corners

Packaging is the first line of defense against edge and corner damage and requires targeted protection. Dedicated edge protection: all edges and corners of components (external and internal corners) are wrapped with anti-collision strips, using high-density foam strips (thickness ≥50mm), rubber corner protectors, or plywood, firmly secured with tape; Qinglong's anti-collision strips are up to 80mm thick, with double wrapping at critical points. Surface covering protection: component surfaces are covered with waterproof cloth or pearl cotton to prevent dust and rain contamination during transport while reducing friction damage; Qinglong uses waterproof and moisture-proof pearl cotton with thickness ≥10mm. Customized packaging: large and irregularly shaped components (such as double-curved and hollowed-out components) are packed in custom wooden crates or steel frames, fixed according to the component's shape to prevent internal movement; Qinglong's 12 ㎡ oversized component for Shanghai New World uses a custom steel frame with ≥8 corner fixing points. Clear labeling: packages are marked with labels such as "Fragile", "This Side Up", and "No Heavy Stacking" to alert transport and handling personnel; Qinglong's labels are made of reflective material, highly visible and easy to identify.

2. Stacking Methods: Avoiding Damage from Uneven Load Distribution

Proper stacking distributes loads and reduces compression damage to edges and corners. Layered stacking: flat components are stacked horizontally with no more than 3 layers, with soft pads (foam, rubber pads) between layers; pad thickness ≥50mm and aligned with component edges to avoid localized pressure; Qinglong stacks flat components in no more than 2 layers with pads covering the entire contact surface. Vertical stacking: vertical components such as moldings and columns are stacked upright, with timber blocks at the bottom (height ≥100mm) and side baffles for securing to prevent tipping and collision; Qinglong's vertical components have support spacing ≤1.5m, firmly fixed without wobbling. Categorized stacking: components of different sizes and types are stacked separately to prevent small components from squeezing the edges of large components; Qinglong's transport vehicles are equipped with compartment dividers for categorized storage. Load control: the total stacking weight must not exceed the load-bearing capacity of the bottom-layer components to prevent edge deformation from compression; Qinglong places all bottom-layer components on load-bearing supports to distribute stress points.

3. Transport Vehicles and Routes: Reducing Bumps and Impacts

The choice of transport vehicles and routes directly affects the degree of impact on components. Dedicated transport vehicles: flatbed trucks or box trucks are selected, equipped with shock absorption devices (such as air suspension) to reduce transport bumps; Qinglong uses air-suspension flatbed trucks for all long-distance transport, improving shock absorption by 50%. Vehicle protection: anti-slip mats (such as rubber mats) are laid on the truck bed to prevent components from sliding and colliding during transport; Qinglong's bed anti-slip mats are ≥20mm thick with a friction coefficient ≥0.6. Route planning: smooth roads such as highways and urban arterial roads are prioritized, avoiding bumpy and narrow sections; long-distance transport avoids night driving (poor visibility, fatigue-prone); Qinglong prepares a detailed route map before transport, marking sections to avoid. Speed control: driving speed ≤60km/h (urban roads) and ≤80km/h (highways), slowing down when turning and braking (≤30km/h), avoiding sudden acceleration and hard braking that cause inertial collisions of components; Qinglong drivers must undergo specialized training and strictly follow speed requirements.

4. Loading/Unloading Operations: Careful Handling to Avoid Human-Caused Damage

The loading/unloading process is a high-risk stage for edge and corner damage and requires standardized procedures. Lifting equipment: cranes with appropriate tonnage are selected (lifting capacity ≥1.5 times the component weight), equipped with soft slings (such as straps and flexible wire ropes), with soft pads at the contact points between slings and components to prevent hard contact from scratching edges; Qinglong's sling pads are ≥30mm thick with contact area ≥0.1 ㎡. Lifting methods: lifting points are selected according to component type—flat components use four-point lifting, vertical components use two-point lifting, with lifting points avoiding edge areas; Qinglong's large components have preset lifting points to avoid directly pulling on edges. Manual handling: when small components are moved manually, at least two people work together, handling gently to avoid edge knocks from single-person carrying; Qinglong limits manually carried component weight to ≤20kg, using small forklifts beyond that. On-site protection: protective mats (such as plywood and rubber pads) are laid on the ground at loading/unloading sites, and components are lowered slowly when placed to avoid direct impact with the ground; Qinglong's protective mat coverage at loading/unloading sites is ≥10 ㎡ to ensure safe component placement.