What special measures or methods need to be taken to deal with special ground conditions?

    As a key equipment in modern floor construction, concrete laser leveling machines are widely used in large-area floor construction (such as industrial plants, logistics storage centers, large supermarkets, parking lots, etc.) due to their high efficiency and high precision. The following is a detailed analysis from the aspects of application advantages, core technology, construction process, applicable scenarios and precautions:   Compared with traditional manual leveling (such as scraping with a ruler, vibrating with a vibrating rod) or small mechanical operations, concrete laser leveling machines show significant advantages in large-area construction: 1. Construction efficiency is greatly improved In large-area floor construction, concrete laser leveling machines can achieve continuous operation, and the average daily construction area of a single device can reach 800-2000㎡ (depending on the equipment model and concrete supply speed), which is 5-10 times the efficiency of manual construction. For example, a 100,000㎡ logistics warehouse floor can shorten the construction period by more than 30% and reduce labor costs by 40%-60% by using a concrete laser leveling machine. 2. Higher flatness and precision The concrete laser leveler forms a horizontal reference plane through the laser transmitter, combined with real-time sensor detection and automatic adjustment of the hydraulic system, which can control the flatness error of the floor within ±3mm/2m (far exceeding the ±5-10mm standard of traditional processes), meeting the high-precision requirements for large-area floors in the "Concrete Structure Engineering Construction Quality Acceptance Code", and is especially suitable for industrial floors that are sensitive to flatness (such as precision equipment workshops). 3. Reduce the risk of concrete cracking The integrated vibration system of the equipment (the spacing between the vibration rods is usually 20-30cm) can vibrate the concrete evenly, with a depth of 30-50cm, which can effectively discharge bubbles, reduce honeycomb surface, and avoid strength differences caused by uneven manual vibration. In addition, efficient construction can shorten the concrete pouring interval, reduce cold joints caused by segmented construction, and improve the integrity of the floor. 4. Reduce manual dependence and labor intensity Large-area floor construction requires a lot of manual cooperation (such as paving, leveling, and vibrating), while the laser leveling machine only needs 1-2 operators to cooperate with auxiliary workers (responsible for laying and edge processing) to complete the work, reducing the dependence on skilled workers and avoiding the labor intensity of long-term bending over. 1. Laser positioning system – The laser transmitter can form a 360° horizontal reference plane (covering a radius of 50-100m) above the construction area, which is not affected by the ups and downs of the ground, ensuring the overall horizontal consistency of large-area construction (traditional rulers can only ensure local flatness and are prone to cumulative errors). – Some high-end equipment is equipped with dual laser systems or laser radars, which can cope with complex environments (such as strong light, obstacles) and reduce signal interference. 2. Automatic control system The equipment detects the deviation between the concrete surface height and the reference surface in real time through sensors (response speed up to 0.1 seconds), and automatically adjusts the lifting and lowering of the scraper and vibrating mechanism to achieve "detection-adjustment-operation" closed-loop control to ensure uniform flatness at every location in large-scale construction. 3. High-efficiency vibration and paving mechanism – The frequency of the vibrating rod is adjustable (usually 3000-6000 times/minute), which can be adjusted according to the slump of concrete to ensure deep vibration and compaction; – The scraper width is mostly 2-4m, and the single paving area is large. With the equipment travel speed (adjustable from 0-10m/min), continuous and uniform paving is achieved. 1. Preliminary preparation – Base treatment: clean up the base debris and water accumulation, repair potholes, and ensure that the base flatness error is ≤5cm (use milling machine if necessary); – Laser system calibration: set the height of the laser transmitter according to the design elevation, and debug the matching degree of the equipment sensor and the reference surface; – Concrete preparation: Mix concrete according to the designed ratio (the slump is usually 120-200mm, and continuous supply is required to avoid construction interruption). 2. Concrete spreading and leveling – Spreading: Use a pump truck or a forklift to unload the concrete to the construction area, and manually level it initially (the thickness is slightly higher than the design elevation by 5-10cm); – Laser leveling: The equipment travels at a uniform speed in the longitudinal or transverse direction, the scraper scrapes the concrete surface, and the vibrator vibrates synchronously; if the area is too large, use the "block skipping method" construction (each block area ≤200㎡, leaving expansion joints) to avoid concrete shrinkage and cracking. 3. Subsequent treatment – Slurry raising and polishing: 1-2 hours after leveling (before the initial setting of concrete), use a polishing machine to raise the slurry and finish the surface (can be used in conjunction with the subsequent process equipment of the laser leveling machine, such as a four-disc polishing machine); – Maintenance: Cover with film or sprinkle water for maintenance, the maintenance period is ≥7 days to avoid surface cracking. – Industrial plant floor: such as automobile factories, electronic workshops, etc., which have high requirements for flatness (must meet the requirements of equipment installation and forklift driving) and strength, and laser leveling can reduce ground settlement and wear; – Logistics warehousing floor: The floor of large warehouses and distribution centers needs to withstand the rolling of heavy shelves and forklifts. The high precision of laser leveling can avoid the tilting of cargo stacking and the bumping of forklifts; – Transportation hub floor: such as airport aprons, high-speed railway station squares, etc., which have large areas and need to withstand vehicle loads for a long time, and require uniform overall strength of the floor; – Commercial and public building floor: such as large shopping malls and exhibition centers, which have high requirements for the aesthetics of the floor (flatness affects the subsequent epoxy and floor tile laying), and laser leveling can reduce the rework of later decoration. 1. Environmental adaptability – Strong light or rainy days may interfere with the laser signal, so a rain shelter or anti-interference laser system is required; – When the wind force is ≥ level 5, the laser transmitter may deviate, and construction needs to be suspended or the transmitter bracket needs to be reinforced. 2. Concrete quality control – The slump of concrete needs to be stable (fluctuation range ≤ 20mm), otherwise it is easy to cause sand or cracking on the surface after leveling; – Avoid interruption of concrete supply, otherwise cold joints will be formed, affecting the integrity of the floor. 3. Equipment operation and maintenance – The operator needs to be trained and familiar with laser system calibration and emergency handling (such as manual shutdown when the signal is lost); – Regularly clean the concrete residue on the vibrator and scraper to avoid affecting the accuracy of the equipment. 4. Cost consideration The purchase or rental cost of laser leveling equipment is relatively high (about 100,000-300,000 yuan for domestic equipment and about 500,000-1,000,000 yuan for imported equipment), but for large-scale construction of more than 10,000 square meters, the cost savings (labor and construction period) brought by its efficiency improvement are far higher than the equipment investment. The concrete laser leveling machine solves the pain points of "low efficiency, poor precision, and strong dependence on manual labor" in large-area floor construction through "laser reference + automatic control" technology, and has become the mainstream solution for modern floor construction. With the intelligent upgrade (such as unmanned driving and BIM technology integration), its application in large-area floor will be more efficient and more accurate, further promoting the development of floor construction towards industrialization and standardization. However, it is necessary to pay attention to the selection of equipment models in combination with scene requirements and strictly control the construction process to maximize its advantages.     Click the below to jump immediately!!! ARMOUR JOINT CONCRETE LEVELING MACHINE LIGHT TOWER POWER TROWEL SLIPFORM MACHINE STEEL FIBER TOPPING SPREADER TRACKED MINI DUMPER  

Finishing concrete is not an easy job. During construction, workers' hands, backs and knees are vulnerable to injury. The advent of the trowel allows construction workers to stand while the concrete is finished. Based on the size of the project, the number of people and the customer's requirements for the surface layer, the construction party may consider purchasing a trowel. If you are a construction party specializing in concrete staining, staining or home improvement polishing, maybe you don't need to buy a ride-on trowel (double disc machine). This type of troweling machine is not only expensive, but also has a high hardness of the ground after finishing, so the above-mentioned type of ground does not have such high requirements. In fact, a walk-behind trowel is sufficient to meet the work requirements of pulping and finishing small-area floors. Under what circumstances should you consider investing in a trowel? In general, construction area is an important consideration. "Even a small-area project can use a trowel, even if the project is only a few hundred square meters. As long as the construction area reaches 100 square meters, you must use a trowel, and if it exceeds 300 square meters, you have to consider using a small ride-on trowel From another perspective, the work efficiency of a single-disk trowel is equivalent to that of three construction workers using traditional manual finishing tools such as scrapers. It seems that the biggest advantage of the trowel is to increase the speed of application. But this is only a one-sided understanding of the advantages of the trowel. What the trowel gives is not a simple speed increase but the efficiency when dealing with large-scale construction. Furthermore, the troweling machine allows the construction party to choose a more appropriate time to start the machine when dealing with large-scale construction, instead of having to start early due to the need to consider the overall area of construction like traditional construction. Troweling machine operation steps: 1. Before use, check whether the motor, electrical switch, cable and wiring are normal and comply with the regulations, and install a leakage protector. 2. Before use, check and clean up the sundries on the wipe plate to avoid the whole machine from jumping when in use. 3. After turning on the power, carry out a test run, the blades will rotate clockwise and must not be reversed. 4. Operators should wear insulating shoes and gloves, and the cables should be picked up by auxiliary personnel, who should also wear insulating shoes and gloves. Pay attention to prevent electric shock accidents caused by the cable insulation layer being broken. 5. The troweling machine breaks down, and it needs to be shut down to cut off the power before it can be repaired. 6. The trowel should be stored in a dry, clean and non-corrosive gas environment. The handle should be placed in the specified position, and no rough loading and unloading should be allowed during transfer. Construction Notes: 1. During construction, pay attention to the temperature of the motor reducer box not exceeding 80° 2. The engine oil in the turbine box needs to be checked frequently. If the oil level is lower than the oil level, please refuel in time. After each use, the equipment should be cleaned in time, especially the smears should be stored in a dry, clean and non-corrosive environment. When the smear is worn to 30mm on one side, loosen the nut, turn the smear around and re-tighten the screw to achieve the purpose of two pairs of use. Angle of smear Rotate the hand wheel to adjust the angle of smear to achieve the ideal effect of rough smearing. If you need to shut down during construction, please turn off the power in time. When the gasoline engine stops, press the switch on the handle in time to stop. The ground effect after the troweling machine is more uniform, the construction speed is faster, and the operation is more convenient. Working with a hand-held spatula for a long time will easily fatigue the knees, shoulders and elbows of the construction workers, which will affect the construction effect. To put it simply, the use of a trowel makes the difficult operation easier, and it is the best equipment for finishing the floor.

  Concrete is a building material mixed with materials such as sand, stone, cement and water. It hardens in the air and has high strength, durability and excellent wear resistance. However, if the compacted soil is soaked in water for a long time, it may suffer some effects.   First, long-term immersion in water may affect the strength of concrete. The cement in concrete reacts with water to form substances such as hydrated calcium silicate, which make the concrete stronger and more durable. However, if the compacted soil is soaked in water for a long time, the hydration reaction may be inhibited, resulting in a reduction in concrete strength. In addition, if chemicals in the water react with certain ingredients in the concrete, they may also affect the strength and durability of the concrete.   Secondly, long-term immersion in water may affect the wear resistance of concrete. The wear resistance of the concrete surface is related to its hardness, and soaking in water will soften the concrete, thereby reducing its wear resistance. In addition, chemicals in the water may also reduce the wear resistance of concrete if they react with certain components in the concrete.   Finally, prolonged immersion in water may subject concrete to water pressure and flow rates. If a concrete structure is surrounded by water water pressure can cause stress on the structure, especially if the water depth is large. Additionally, flow rates can cause abrasion and erosion of concrete surfaces, especially in environments such as rivers and oceans. Therefore, in some cases, leaving the concrete in water after it has been poured may have an impact. If the concrete structure needs to be immersed in water, it is recommended to consider these factors during the design and construction process and take corresponding protective measures to protect the strength and durability of the concrete structure. construction period be ensured, ultimately achieving high-precision and high-efficiency floor construction and significantly reducing the operating costs throughout the entire life cycle.   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.