How can we ensure safety during concrete construction?

Safety is a core aspect of concrete construction, encompassing all elements: personnel, machinery, materials, methods, and the environment. Through comprehensive management processes encompassing preventive measures, ongoing control, and post-construction emergency response, we can prevent accidents such as collapses, mechanical injuries, electric shocks, and falls from heights. The following are key implementation points, broken down by construction phase and management dimension:

1. Pre-construction: Safety preparation is the foundation (prevention first)

Pre-construction preparation determines the starting point of safety management and must address the four key aspects of "plan, personnel, equipment, and site" to avoid unauthorized adjustments to plans during construction.

(1) Prepare a dedicated safety plan and clearly define risk management priorities.

Concrete projects involve high-risk processes such as formwork support, lifting and hoisting, and working at height. A specific safety plan must be prepared and approved according to regulations (projects exceeding a certain scale require expert review, such as erecting a formwork support system ≥8m high). The plan should clearly define:
Risk identification: List the risk points for each process (e.g., formwork collapse, pump truck overturning, cable damage and electric shock), and the corresponding countermeasures;
Technical parameters: Formwork support vertical pole spacing, crossbar pitch, sweeping pole configuration, and lifting equipment selection (e.g., tower crane lifting capacity, pump truck outrigger span);
Personnel division of labor: Clarify the safety responsibilities of safety officers, technicians, and operators to avoid blind spots in responsibility.

(2) Personnel safety training and briefing to eliminate "ignorant operation"

Full-staff training: All personnel involved (including concrete workers, scaffolders, crane operators, and general workers) must complete safety training before taking up their posts. Key training focuses on:
Specialized workers (such as scaffolders, crane operators, and electricians) must hold a special operations operator certificate; working without a certificate is strictly prohibited;

Common concrete engineering accident cases (such as causes of formwork collapse and first aid for electric shock) and self-protection skills.
Detailed briefing: Before construction begins, the team will receive both a written and verbal safety briefing. The content must detail operational details (e.g., "The pump truck's outriggers must be supported on solid ground; operating without a backing plate is strictly prohibited on soft soil"; "The vibrator cable must not be damaged; wet hands must not touch the switch"). These briefings must be signed and recorded by both the person giving the briefing and the person receiving the briefing.

(3) Equipment and material inspection to eliminate potential risks of "operating with defects"

Mechanical equipment inspection:

Lifting equipment (tower cranes, truck-mounted pumps, concrete placing booms): Check the braking system, wire rope wear, and outrigger stability. Perform a test run with no load to ensure the limit switches (torque limiter and height limiter) are sensitive and effective.
Concrete machinery (mixers, vibrators, conveying pumps): Check motor insulation and cable integrity (to avoid damage and leakage). Vibrators must be equipped with a residual current device (RCD) (rated leakage current ≤ 30mA, actuation time ≤ 0.1s).
Tools and protective equipment: Check safety helmets (for cracks and expiration), safety belts (double hooks intact and free of aging), and insulating gloves (for damage).
Materials and Site Preparation:

Formwork support materials (steel pipes and fasteners) must comply with national standards. Bent, rusted, or cracked steel pipes are strictly prohibited.
Work Surface Cleaning: Clear debris from the pit/scaffolding. Elevated work platforms must be fully covered with scaffolding. Edges (such as the pit perimeter and floor edges) must be protected by 1.2m-high guardrails and 18cm-high toeboards, and high-mesh safety nets must be installed.
Temporary Power Supply: Cables in the concrete work area must be overhead or protected in conduits. Do not roll over or immerse them. Distribution boxes must be locked and posted with "Caution: Electric Shock" warning signs.
 

2. During construction: process control is key (dynamic risk prevention)

During concrete construction, there's a lot of cross-functional work (such as collaboration between formwork workers, concrete workers, and crane operators). Real-time risk monitoring is essential to prevent violations.

(1) Formwork Support System: Prevent Collapse (Core Risk Point)

Formwork collapse is the most fatal accident in concrete construction, and the following aspects require key control:
Support Erection Monitoring: Erection must strictly follow the specific plan, with safety officers on duty throughout the process. Verify that the vertical poles are vertical, that the sweeping poles are ≤20cm above the ground, and that the crossbars are fully connected to the vertical poles. Arbitrarily increasing the spacing between vertical poles or reducing the number of crossbar layers is strictly prohibited.
Load Control: During concrete pouring, it is strictly forbidden to pile excess materials (such as rebar or cement) on the formwork supports to prevent localized overloading. The pouring sequence must be carried out according to the plan (e.g., "from the center to the sides" and "pour in layers, each layer ≤ 50cm thick") to prevent excessive stress on one side of the formwork.
Real-time Monitoring: During the pouring process, designated personnel (technicians and safety officers) will monitor the support system. If any abnormalities such as bent uprights, loose fasteners, or formwork deformation are detected, pouring will be stopped immediately, personnel will be evacuated, and work will resume only after satisfactory corrections have been made.

(2) Lifting and Concreting Operations: Prevent Mechanical Injuries and Falls from Height

Lifting Safety:

Before operating a tower crane or pump truck, ensure that no personnel are within the operating radius (establish a warning area and have dedicated personnel on duty). Lifting objects of unknown weight is strictly prohibited.
When using a concrete placing boom, it must be secured to a solid foundation. Overloading is strictly prohibited. Operators must wear safety belts and operate from a stable platform.
When unloading concrete trucks, the operator must stand in a safe position to prevent the truck's tires from crushing personnel or cables.

Concrete pouring safety:

When pouring at height (e.g., floors, bridge piers): Operators must stand on scaffolding or operating platforms. Standing on formwork or rebar is strictly prohibited. Safety belts must be hung high and used low (with the attachment point above the work surface).
Vibrating operations: Operators of vibrators must wear insulated shoes and gloves. It is strictly prohibited to use the vibrator to pry rebar or formwork. If the cable is damaged, immediately stop using it and replace it.
Avoid fatigue during work: Concrete pouring is often a continuous operation (e.g., large volumes of concrete must be poured in one go). Work shifts should be arranged appropriately, with each shift lasting no more than 8 hours to prevent operator errors due to fatigue.

(3) Cross-operation and Emergency Response: Collision Prevention and Early Response

Cross-operation Control: If simultaneous work is being carried out on upper and lower levels (e.g., pouring on the upper level while cleaning on the lower level), a "hard barrier" (e.g., scaffolding or safety nets) must be established to prevent tools and concrete blocks from falling and injuring personnel. Workers must wear hard hats and are strictly prohibited from remaining on the lower level.

Emergency Response:

If an electric shock accident occurs: Immediately disconnect the power supply and use insulated tools to remove the victim; do not drag the victim by hand. If the victim is not breathing, immediately perform CPR and call 120.
If a fall occurs: Avoid moving the victim (to prevent spinal injury), contact emergency services immediately, secure the scene, and investigate the cause of the fall.
A first aid kit (including tourniquets, bandages, and disinfectants) must be available on site, and emergency telephone numbers (for project safety officers, hospitals, and firefighters) must be posted near the work area.

3. Post-construction: Closing and Summary (Closed-loop Management)

After concrete pouring is complete, a safe finishing touch must be ensured, while lessons learned and subsequent management optimization are also required.

Site Cleaning and Equipment Maintenance:

Promptly clean concrete debris from the work surface. When dismantling temporary protective structures (such as scaffolding), proceed from top to bottom. Do not throw steel pipes or fasteners at random.
Perform maintenance on mechanical equipment (such as cleaning concrete residue from vibrators and inspecting the hydraulic system of pump trucks). Electrical cables should be neatly stored in a dedicated warehouse.

Safety Inspection and Corrective Actions:

Conduct a secondary inspection of the formwork support system to confirm that the concrete strength meets the design requirements (e.g., beam and slab concrete strength ≥ 75% of the design value). Only then can the supports be removed according to the plan. Premature formwork removal is strictly prohibited.
Collate safety records (briefing records, equipment inspection records, and process monitoring records) to form a closed-loop system.

Case Review and Training:

If minor hazards occur during construction (such as loose fasteners or damaged cables), a full-staff review is conducted to analyze the cause (whether it was an operational issue or an oversight) to prevent recurrence.
Safety lessons learned from this construction project will be incorporated into the next training session to continuously enhance safety awareness.

4. Core Principles: Implement the "Three Musts" to Eliminate Idle Responsibilities

Concrete project safety management requires a clear accountability system to avoid a situation where "everyone is responsible, but no one is responsible":
Managing production must also manage safety: The project manager is the primary person responsible for project safety and must regularly inspect the implementation of safety measures. Compressing safety preparation time to meet deadlines is strictly prohibited.
Managing technology must also manage safety: Technicians must fully consider safety risks when developing plans. Technical briefings must include safety requirements and must not focus solely on process without considering safety.
Managing teams must also manage safety: The team leader is the direct on-site safety manager and must supervise team members' adherence to regulations. Any violations (such as not wearing a safety helmet or improper formwork removal) must be immediately stopped. Turning a blind eye is strictly prohibited.
 

In summary, the core of concrete project safety management is "prevention first, process control, and individual accountability." Safety requirements must be integrated into every step, from plan development to personnel operations to emergency response, establishing a comprehensive control chain to minimize safety incidents.

 

Note: The parameters provided in this document are for reference only and are not mandatory. Due to differences in technical characteristics between different brands and models of laser levelers, please consult the manufacturer for a suitable solution before actual operation. This reference document assumes no responsibility for any issues arising from failure to follow the manufacturer's instructions.
 

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