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Introducing laser leveling machines to solve the difficulties in shale gas platform construction
1. Analysis of shale gas platform construction status
With the continuous acceleration of natural gas development speed, shale gas development gradually to the factory development, the platform area is also expanding, the drilling depth is also increasing, and the requirements for the flatness and construction cycle of the concrete floor are becoming higher and higher. The conventional construction method is to divide the warehouse according to the working width of the vibratory beam 6-7m, divide the whole site into 7-13 pieces in the width direction, support the mold or set up the guide rail on both sides of each piece, pour concrete and smooth the vibratory beam, such method needs to set up the template or adjust the elevation of the guide rail many times. Within the working range of the vibratory beam, the place where the concrete is not hollow and not full cannot vibrate, and small pit functions are more likely to be formed by bleeding and sinking during the later maintenance. Water accumulation occurs in rainy days after the completion of the site, which seriously affects the placement and production and use of shale gas production and transportation equipment in the later stage. Therefore, the conventional method can not meet the requirements of the flatness of the shale gas platform.
2. The feasibility of the application of laser leveling machine
▶ The leveling machine is small in size, light in weight, not high in road capacity, convenient and fast in transportation;
▶ The leveling machine has high degree of automation, low failure rate, simple operation and easy to learn, and low requirements for operators;
▶ The leveling machine has simple structure, low procurement cost, low use cost, and little loss due to weather and other reasons;
▶ The single leveling width of the laser leveling machine can reach 2~3m, the paving speed can reach 4~5m/min, the area of 500 square meters can be completed per hour, and the area of 4000 square meters can be completed every day. It can be seen that the construction speed is fast, and the efficiency is more than 3 times that of the conventional construction method, especially suitable for the shale gas platform construction period is high. Concrete surface construction with simple surface shape and large working surface;
The laser leveling machine provides laser signal through a fixed transmitter, which can completely cover the whole scene. The receiver receives the signal in time, and the computer automatically calculates the design elevation according to the current position of the leveling machine, and issues adjustment instructions to the whole plate up to 10 times per second, eliminating the influence of uneven field base and greatly improving the smoothness of the concrete. Compared with the ground constructed by the laser leveling machine and the conventional method, 22 points were detected (one point every 5mx4m), and the average flatness was 1.3mm and 4.1mm, respectively. It can be seen that the leveling quality of the laser leveling machine is more than 3 times that of the conventional method.
▶ Due to the good platform visibility conditions, there is no need to change the position of the laser transmitter during the construction process of the laser levelling machine, which can reduce unnecessary processes and reduce errors caused by operational errors. In the construction process of concrete, it is not necessary to separate the bin support mold, only at the edge of the site support mold can reduce the support modulus of more than 74%. After leveling, the addition of a single disc hand-held polishing machine, double disc driving polishing machine and cutting machine can make the heavy manual labor into mechanical paving, vibrating, leveling, pulp lifting, plastering, which can reduce the operator by 30% compared with the conventional construction method, and save 2 to 3 yuan /㎡ than the conventional process.
In summary, the laser levelling machine has fast speed, high efficiency and obvious economic benefits, which is suitable for the characteristics of shale gas platform, and it is very necessary and feasible to construct concrete in large areas in mountainous areas.
At present, many pilot application results have confirmed that the use of laser levelling machine is not only feasible but also very necessary in the large-scale concrete construction of shale gas platform. On the one hand, the application of laser levelling machine can improve the flatness of the platform, on the other hand, it can also improve the construction efficiency, shorten the construction period and reduce the cost, compared with the conventional construction method, the benefits brought by this construction method are beyond doubt.
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About the Author: Shandong Vanse Machinery Technology Co., Ltd.
Shandong Vanse Machinery Technology Co., Ltd. is a high-tech manufacturer specializing in concrete construction machinery, including laser screeds and related equipment. The company integrates R&D, production, and global sales, with products exported to over 60 countries and widely used in infrastructure projects worldwide.
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How does a concrete laser leveling machine work?
How does a laser leveling work? Do you know the leveling process of laser leveling machine? For how to do a good job in floor engineering, the selection of materials and construction technology are equally important. Laser leveling machine is also the key point that needs to be grasped in the construction process. Industrial plants have high requirements on the flatness of the ground level and surface resistance. Manual construction is difficult to grasp and control, and it is difficult to achieve standardized construction. The following articles are how to construct laser leveling machines and precautions, and how to avoid construction errors. 1 The construction of the floor project needs to be fully prepared. From laying the base and steel mesh – setting the dowel bar – placing the buffer zone – concrete mixing, every step is carefully grasped the details. (1) After the base layer is processed, the equipment of the laser paver is debugged, and the original benchmark point is used as the fixed reference level point; the non-woven fabric is laid, the side formwork is supported, the laser transmitter is erected, and the ground level is introduced into the laser leveling machine according to the original benchmark point. (2) Commercial concrete is used for transporting concrete, and the commercial concrete is transported to the entrance and exit of the garage by tank truck, and then transported to the construction site by a three-wheel dump truck. (3) Scale calibration Use a hand-held laser receiver to check the floor elevation, introduce the elevation into the laser paver, and adjust the reference point (±0.00) on the leveling machine. 2 The concrete mixed in the mixing station is pumped and paved on the gravel base. The paving speed of the laser leveling machine should be appropriate, and the paving can be quickly assisted by manual paving. 3 About 3-4 hours after the concrete is paved by the laser leveler, the best time is when there are no clear footprints after the master. Use a single-disc or double-disc trowel, install a rubbing disc, and rub it repeatedly during the initial setting of the concrete until the concrete slurry is released. Use a single-disc and double-disc trowel, install a smoothing disc, and rub it repeatedly when the concrete bleeds and initially sets until the concrete slurry is released. 4 It is recommended to throw the specified amount of wear-resistant material evenly on the concrete surface just after the grout is broken, and the places that lose water quickly near the formwork, columns, doorways, walls, and pits should be thrown first. Depending on the specific conditions, special materials can be thrown in more than two times. 2/3 of the amount of the first throwing; the remaining 1/3 of the second throwing; the time interval between the two spreading of aggregate should not be too long. 5 After the aggregate is sprinkled once, after the aggregate absorbs the coagulated water, the aggregate is polished and compacted with a trowel, and then the aggregate is sprinkled for the second time, and the compacted aggregate is polished with a trowel. The amount of wear-resistant aggregate is not less than 5kg/㎡. During the grinding and compacting process, a ruler can be used to assist scraping. If it is not smooth, adjust the distribution of aggregates and grind again. The number of grinding times of the laser leveling machine can be operated by construction personnel according to specific conditions. The corners are scraped manually. The front and back grinding directions are criss-crossed, and the flatness is checked with a ruler after the grinding is completed. 6 Depending on the hardening of the concrete, perform at least three trowel operations without discs after the surface has faded. The operation speed and angle of the trowel should be adjusted according to the hardening of the concrete. It is recommended to adjust the angle of the blade at the beginning of each finishing to avoid damage to the floor. 7 After scientifically completing the laser leveling machine construction process, it takes more than 28 days to maintain the floor. After the construction is completed, sprinkle water for maintenance, and lay geotextiles to reduce water evaporation and keep the wear-resistant floor after construction in water. 8 Cut the expansion joints after the concrete has been watered and cured for 24 hours. Because the interval between the wall pillars is about 7 meters, which meets the requirements of the expansion joint gap, the expansion joints are mainly distributed according to the structure of the wall pillars, forming a layout of 7m*7m; the depth is about 6-7cm, and the gap is about 5mm.The Laser leveling machine manufacturers: Quality and quantity are guaranteed because the equipment has these advantages
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