The Main Points of Small Roller in Subgrade Construction

– Prevent entrapment: When the metal trowel is rotating at high speed, the operator should be careful to avoid clothing, hair, fingers, etc. from getting close to the rotating trowel. Wear work clothes, tie the cuffs and hems tightly, and wear a safety helmet and protective gloves. For example, before starting the trowel, be sure to carefully check the surrounding environment to ensure that there are no debris that may be involved. – Prevent fragments from splashing: If the metal trowel is cracked or broken, the fragments may splash and injure people. Therefore, check the integrity of the trowel regularly. If there are signs of cracks or damage, stop using it and replace it immediately. At the same time, during use, maintain an appropriate safety distance and avoid standing in the direction where you may be hit by fragments. – Proper installation: When installing the metal trowel, ensure that it is firmly installed. According to the instruction manual of the trowel, use appropriate tools to install the trowel on the corresponding shaft and tighten the screws. Insecure installation may cause the trowel to loosen or fall off during operation, which will not only affect work efficiency but also cause safety accidents. – Control operating parameters: – Speed ​​control: Operate strictly according to the rated speed of the trowel machine, and do not increase the speed at will. Too high a speed will increase the centrifugal force of the trowel blade, which may cause the trowel blade to deform and damage, and will also increase wear. For example, for most concrete trowel operations, the trowel blade speed is generally controlled at around 70-150 revolutions per minute. – Pressure control: Reasonably control the pressure of the trowel blade on the ground. If the pressure is too high, the friction between the trowel blade and the ground will be too large, which may easily cause the trowel blade to wear too quickly, and may also cause scratches or unevenness on the ground. Generally, the pressure is adjusted according to the hardness of the ground and the trowel stage (rough grinding or fine grinding). The pressure should be appropriately reduced in the fine grinding stage. – Avoid idling and excessive friction: Try to reduce the idling time of the trowel blade. When idling, the trowel blade does not contact the ground for effective operation, but its own rotation will cause wear. At the same time, during use, avoid direct friction between the trowel and hard objects such as metal, such as avoiding operation on metal structures without concrete and other ground materials to prevent damage to the trowel blade. – Timely cleaning: After each use, clean the concrete residue, dust and other debris on the trowel in time. If these debris are not cleaned in time, the friction between the trowel and the ground will increase the wear rate during the next use. You can use a brush or a high-pressure air gun to clean it. – Check the wear condition: Check the wear degree of the trowel regularly. Observe whether the edge of the trowel becomes blunt, has a gap or a large area of ​​wear. If the edge wear exceeds a certain limit (such as wear exceeding 2-3 mm), the trowel needs to be replaced. At the same time, check the flatness of the trowel. If deformation occurs, it should be replaced or repaired in time. – Prevent corrosion: If used in an environment with chemical substances (such as acid, alkali, etc.), the trowel should be cleaned in time to prevent chemical substances from corroding the metal trowel. In addition, when storing in a humid environment, anti-rust measures should be taken, such as applying anti-rust oil.

Due to the limitation of construction technology, the road surface is uneven in many cases, and the vehicle cannot maintain a very good stability during driving, and it may cause ruts after repeated rolling, which is equivalent to being stuck in a car. vicious circle. Wouldn't it be better to use concrete laser leveling? Nowadays, many roads are uneven, and there are many reasons. Now I will introduce the reasons for uneven roads: 1. The unevenness of the base layer affects the flatness of the road surface, resulting in uneven paving thickness, and the control of the base layer construction is not strict. Some even use bulldozers and graders to lay the base layer. The construction quality and flatness are difficult to control. 2. The influence of road paving machinery and technology on the smoothness: A. Improper selection of paver structure parameters, resulting in uneven paving thickness and waves; B. Improper control of the base line of the paver, resulting in waves; C. Improper operation of the paver causes uneven paving speed and frequent starting, resulting in rough and uneven surface layers; D. When a slipform paver is used for the concrete pavement, it is affected by the paver itself, control datum line and operation. 3. The influence of the quality of surface paving materials on the flatness: A. The ratio of asphalt pavement materials, mixing, oil temperature and shutdown due to material failure; B. Raw materials, proportioning and stoppage of materials for concrete pavement. 4. Effect of rolling on flatness: A. The use of low-frequency, high-amplitude road rollers will cause jumping and tamping phenomena, and excessive initial tonnage will cause pushing deformation; B. Uneven rolling speed, sudden braking, sudden start, random parking and U-turn, parking on the rolled and formed road without turning off the vibration device will cause road congestion, and stopping on the uncooled road will cause sunken; C. Improper rolling route, if you don't pay attention to wrong wheel rolling, turning back at the same cross section every time will cause uneven road surface; D. The number of times of rolling is not enough, the compaction is not enough, and ruts are easy to form after opening to traffic. The leveling mechanism of the laser leveling machine is driven by hydraulic pressure, cooperates with the laser system and the computer control system to complete the leveling work while automatically leveling, and the work efficiency is extremely high. The laser transmitter used to control the ground level is arranged independently, and the level of the ground will not produce cumulative errors. Compared with the traditional method, the flatness of the super-large area is as easy to control, and at the same time, the construction joints and formwork usage of the floor are greatly reduced. Fast construction speed: use laser leveling machine and other equipment to construct concrete slabs, which improves the work efficiency by 3 times and saves 30% compared with the traditional beam vibrator method. It can complete 2000 square meters per day on average. It is especially suitable for simple shapes and large-scale operations. pavement construction. High degree of automation and low labor intensity: the use of laser leveling machines and other equipment changes heavy manual labor into mechanical paving, vibrating, leveling, slurry extraction, and surface plastering, reducing the number of operators by 30% and reducing labor intensity at the same time. High economic benefit: the application of laser leveling machine and other equipment saves the cost by 2-3 yuan/㎡ compared with the traditional process, with fewer joints and lower maintenance costs in the later period, so that the economic benefit is significantly improved. Advanced equipment such as laser leveling machines are especially suitable for projects such as docks, storage yards, expressways, airports, large squares, parking lots, and municipal roads that have relatively simple shapes, large amounts of action, and high construction quality requirements.

Recently, some users have received feedback that there are still some dangers in the process of using the laser leveling machine. In fact, the leveling machine does have some dangers, so this actually requires everyone to use the laser leveling machine. When leveling the machine, we must always put safety first. Only in this way can we avoid danger. So how to ensure the safety of laser leveling machine operation? See below for the answer. If the laser leveling machine is difficult to level during use or the material is too high, it must be stopped first, and the road surface should be further sorted before continuing to use. It cannot be used forcibly, otherwise the equipment will be damaged and the road will be damaged. Construction is also bad. Therefore, it is necessary to ensure the normal operation of the equipment and ensure the stability and smoothness of the road surface. In the construction of high-grade pavement, mechanized construction runs through the whole process, and the cooperation and coordination between various machines is especially important. Once a problem occurs, the work will be stopped. Therefore, the performance of the laser leveling machine needs to meet the use standards, and the construction must be carried out in strict accordance with the operation, and overall arrangements should be made to maximize the benefits of construction and equipment, and to better complete tasks. After manually laying the concrete material on the built formwork, it is placed on the road by the crane or the walking mechanism of the leveling machine itself, the laser leveling machine walks along the track, and the screw propeller moves the horizontal axis of the frame back and forth Then, the vibrator immediately behind the screw propeller vibrates and lifts the road surface; then, the roller of the machine performs multiple back and forth rolling on the road surface for leveling work, and the completion The pavement is leveled. Before using the laser leveling machine, pay attention to check whether the power wiring is safe, whether the machine parts are tightened, whether the control system is working, and whether the lubrication of the bearing shaft is in place. During the operation, it is necessary to pay attention to whether the placement of the laser leveling machine on the track is balanced. Before starting work, the power supply should be connected to the line for trial operation. 70% of the completion of pavement engineering tasks depends on the allocation of mechanical equipment resources. The strength of the laser leveling machine, its performance, the reasonableness of the configuration, and the level of mechanized construction directly restrict the project quality and economic benefits. The above method of safe operation of the laser leveling machine is introduced here for everyone. I hope you can get some substantial reference value from our article. If you have any other questions, please feel free to consult us. We will answer them one by one.