How does the laser scanning system of the laser leveling machine achieve positioning and reflection?

Slump: 120~180mm (about 150mm is appropriate) Applicable scenarios: Applicable to laser leveling machine or paver construction to ensure that the fluidity of concrete meets the requirements of mechanical paving and vibration. High slump: 180~220mm (when adding water reducer) Applicable scenarios: Complex reinforcement structure or high temperature dry environment, it is necessary to improve the fluidity of concrete to avoid segregation. Low slump: 80~120mm (dry hard concrete) Applicable scenarios: Construction with slipform paver, or projects with high early strength requirements.   Laser leveling machine: requires a higher slump (120~180mm) to facilitate mechanical vibration and leveling. Slipform paver: The slump should be strictly controlled at 80~120mm to avoid deformation of the structure due to excessive fluidity. Hot and dry weather: The slump can be appropriately increased (+20~30mm) to reduce the slump loss caused by water evaporation. Low temperature or rainy season: The slump can be appropriately reduced (-10~20mm) to prevent concrete segregation. When the coarse aggregate particle size is large and the grading is poor, the slump needs to be increased to ensure workability. Adding water reducer can reduce the water-cement ratio and improve strength while maintaining the slump.   Each truck of concrete needs to be tested for slump before unloading. If the deviation exceeds ±20mm, it needs to be adjusted (such as adding admixtures or secondary mixing). The mixing and pouring of concrete must be completed before the initial setting (usually ≤2 hours) to avoid slump loss due to too long time. Slump is too large: it is easy to cause bleeding and segregation, which can be improved by adding fly ash or reducing the water-cement ratio. Slump is too small: poor fluidity, it is necessary to add water reducer or increase the water consumption appropriately (need to be verified by the laboratory).   "Technical Specifications for Construction of Highway Cement Concrete Pavement" (JTG/T 3650-2020): The recommended slump is 100~180mm, which is adjusted according to the construction machinery. "Concrete Structure Engineering Construction Quality Acceptance Code" (GB 50204-2015): The slump detection frequency is required to be no less than once every 100m³. Reasonable control of slump can ensure the construction quality, durability and appearance smoothness of concrete pavement. The specific parameters need to be determined in combination with design requirements, construction technology and environmental conditions.

  In the hot summer, the construction of concrete laser leveling machines has not stopped. The high temperature construction environment in summer is a heavy test for engineering machinery and equipment such as concrete laser leveling machines. Therefore, it is very important to do a good job of daily maintenance of laser leveling machines in summer. Today, the editor of Shandong Vanse will explain to you some construction precautions for concrete laser leveling machines in summer for your reference. 1. In summer construction, we must first prevent the engine from overheating. Under normal circumstances, the engine temperature should not exceed 95°. If the temperature is too high, we should choose a relatively cool area to shut down and cool down. At the same time, we can lift the engine hood for ventilation and heat dissipation. 2. The amount of cooling water should be detected in time. When the water radiator reaches 100°, do not rush to add cooling water. Instead, we should shut down the engine immediately to cool down the engine at idle speed, and then add coolant. 3. The construction temperature in summer is high. We should check the tire pressure and tire temperature frequently. If the tire temperature is too high, we should shut down the engine in time and place it in a cool place to cool down. Remember to use the wrong method of deflation or pouring cold water to cool down. 4. Check the battery level frequently, add distilled water in time, dredge the vents, pay attention to the density of the electrolyte, and maintain a good charging state. 5. Prevent engine explosion. Before entering the summer, the carbon deposits in the combustion chamber, valve top and other parts should be thoroughly removed to maintain good heat dissipation and normal compression ratio; and the fuel supply advance angle should be checked and adjusted to prevent engine explosion. 6. Check the temperature of hydraulic oil and hydraulic transmission oil frequently. If the temperature is too high, stop the machine for a rest, and never exceed high temperature operation. In short, engineering machinery such as concrete laser leveling machines are subjected to the test of long-term continuous operation during summer construction, and are also affected by high temperature environments. Therefore, summer construction must pay attention to the above conditions, and regular inspections and maintenance work must be carried out regularly, which is not only related to the service life of the concrete machine leveling machine, but also to the construction hidden dangers and the smoothness of the concrete laser leveling machine at work.

✔ Equipment inspection and preparation Before operating a concrete laser leveling, you must ensure that the equipment has been thoroughly inspected and is in good working order. The following are specific requirements for equipment inspection and preparation: 1. Equipment appearance inspection: Check whether the appearance of the leveler is intact and there is no obvious damage, deformation or rust. 2. Power system inspection: Check whether the fuel, lubricating oil and water levels are normal, and whether the engine starts and runs smoothly without abnormal sounds. 3. Laser system inspection: Ensure that the laser transmitter, receiver and control system are working properly, and the laser beam is stable and has no deviation or flickering. 4. Tire and track inspection: Check whether the tires or tracks are intact, whether the air pressure or tension meets the requirements, and whether there is any damage or excessive wear. 5. Safety protection device inspection: Check whether all safety protection devices, such as guards, safety switches, etc. are intact and installed correctly. 6. Electrical system inspection: Check whether electrical components such as cables, plugs, and sockets are intact and free of damage or aging. Special note: During the equipment inspection, if any abnormalities or failures are found, you must stop using it immediately and contact professionals for repair in a timely manner. ✔ Personnel training and safety Personnel operating concrete laser levelings must receive professional training and have corresponding operating skills and safety awareness. The following are specific requirements for personnel training and safety. 1. Professional training: Operators should receive operational training provided by manufacturers or professional training institutions to understand the structure, principles, operating procedures and safety precautions of the equipment. 2. Operating skills: Operators should be proficient in basic operating skills such as starting, stopping, adjusting, maintaining and maintaining equipment. 3. Safety awareness: Operators should have a high degree of safety awareness, understand potential safety risks, and know how to prevent and respond to these risks. 4. Wear protective equipment: Operators should wear protective equipment that meets the requirements during work, such as safety helmets, work shoes, gloves, etc. Special note: Personnel without professional training or without corresponding operating skills are strictly prohibited from operating the concrete laser leveling. ✔ Work environment assessment Before using the concrete laser leveling, the working environment must be evaluated to ensure that the equipment can work in a safe and stable environment. The following are specific requirements for a work environment assessment. 1. Ground conditions: Evaluate the flatness, hardness and stability of the working ground to ensure that the equipment can drive and work normally. 2. Climatic conditions: Pay attention to the climatic conditions of the work area, such as temperature, humidity, wind, etc., to ensure that the equipment can adapt to the current environment. 3. Traffic and obstacles: Assess the traffic conditions and obstacles in the work area to ensure that the equipment will not collide with other objects during driving and operation. 4. Power supply: Ensure a stable power supply in the work area to meet the needs of equipment charging or power supply. Special note: During the work environment assessment process, if any factors that may affect equipment safety or operating results are discovered, corresponding measures must be taken promptly to improve them. ✔ Safety during work During the operation, operators should strictly abide by operating procedures to ensure the safety of themselves and equipment. The following are safety requirements during operations: 1. Stay focused: Operators should stay focused at all times, pay close attention to the operating status of the equipment and the working environment, and promptly discover and deal with potential safety risks. 2. Standardized operation: Operators should start, drive, operate and stop the equipment in accordance with operating procedures. Child-violating operation or speeding is strictly prohibited. 3. Pay attention to the laser system: During the operation, the operator should always pay attention to the operation of the laser system to ensure that the laser beam is stable and guide the operation correctly. 4. Maintain a safe distance: During the operation, the operator should maintain a safe distance from the equipment and other personnel to prevent accidents such as collision or extrusion. 5. Timely shutdown and inspection: During the operation, if any abnormality or safety hazard is found in the equipment, the operator should immediately stop the machine for inspection and contact professionals for repair in a timely manner. Special note: During the operation, any behavior that violates operating procedures or may lead to safety accidents must be stopped immediately and corresponding measures must be taken to correct it. ✔ Maintenance and care In order to ensure the normal operation of the equipment and extend its service life, the equipment must be maintained and maintained regularly. The following are the specific requirements for maintenance and upkeep: 1. Regular cleaning: Clean the equipment regularly to remove dust and stains on the surface and keep the appearance of the equipment tidy. 2. Check and replace lubricating oil: Check and replace the lubricating oil of the equipment according to the manufacturer's recommended intervals and requirements to ensure the lubrication and normal operation of the equipment's moving parts. 3. Check and tighten connecting parts: Regularly check whether the connecting parts of the equipment, such as bolts, nuts, etc., are loose or damaged, and tighten or replace them in time. 4. Check the wear of tires and tracks: Check the wear of tires or tracks regularly. If the damage is serious, replace it in time. 5. Laser system calibration: Calibrate the laser system regularly to ensure the accuracy and stability of the laser beam. Special note: When performing maintenance and upkeep, the manufacturer's operating instructions and safety requirements must be followed to ensure the safety and effectiveness of the operation process. ✔ Emergency response When equipment malfunctions or emergencies occur, operators should quickly take appropriate emergency measures. During the operation of the concrete laser leveling, equipment failures, safety accidents or other emergencies may be encountered. Therefore, operators must have emergency response capabilities to ensure the safety of personnel and equipment. The following are the specific requirements and measures for emergency response: 1. Equipment fault handling: * Once a malfunction or abnormality is found in the equipment, the operator should stop it immediately and cut off the relevant power supply or power source. * Quickly assess the nature and possible scope of the fault, and take necessary precautions to prevent the fault from expanding or causing secondary accidents. * Notify equipment management personnel or professional maintenance personnel to come to the scene for troubleshooting and repair. Operators should cooperate with maintenance personnel in carrying out maintenance work. 2.Safety incident handling: * When a safety accident occurs, first ensure the safety of personnel, quickly evacuate the scene, and take necessary first aid and rescue measures. * Immediately report to superior management or relevant departments, and initiate emergency response procedures in accordance with the emergency plan. * Cooperate with the accident investigation team to conduct accident investigations, analyze the causes of accidents, propose corrective measures, and accept corresponding treatment. 3. Emergency handling: * In case of emergencies, such as natural disasters or emergencies such as fires and earthquakes, operators should stop the machine immediately and follow the emergency evacuation procedures in the emergency plan to ensure the safe evacuation of personnel. * Cut off the power supply of the equipment and other potential sources of danger to prevent the accident from expanding or causing secondary disasters. * Report emergencies to relevant departments in a timely manner and coordinate responses in accordance with the instructions of the emergency plan. ✔ Special Note: • Operators should be familiar with the contents of emergency plans and emergency response procedures, and conduct regular emergency drills and training to improve emergency response capabilities. • During emergency response, stay calm and decisive, follow the instructions in the emergency plan, and do not panic or act blindly. • During emergency response, priority should be given to ensuring the safety of personnel while minimizing equipment losses and environmental impact. ✔ Summary The safe operating procedures of concrete laser leveling machines are an important guarantee to ensure the safety and stable operation of the equipment and the safety of the operators. Through the specific requirements and measures described in this article for equipment inspection and preparation, personnel training and safety, working environment assessment, safety during operation, maintenance and emergency response, etc., we can effectively reduce the probability of safety accidents and protect personnel. life safety and improve the reliability and service life of equipment. Therefore, operators and managers should strictly abide by these procedures and continuously strengthen safety awareness training to ensure the safe and efficient operation of concrete laser leveling machines.