As the main construction machinery for building construction, mobile tower cranes are widely used in building construction due to their high degree of elevation and wide coverage. They are also responsible for the main vertical transportation work. Because of their high center of gravity and high risk, they often Unpredictable safety incidents can occur, and serious accidents that can cause serious damage to the aircraft. Therefore, how to strengthen the safe use and management of mobile tower cranes has attracted the attention of manufacturers, construction companies and construction administrative departments.
The foundation of the mobile tower crane is the foundation of the tower crane. It has been proved that many major safety accidents are caused by the problems of the tower crane foundation, and it is an important factor affecting the overall stability of the tower crane. Some accidents were caused by the construction site’s work-scheduled period and the sloppy installation in the case of insufficient concrete strength. Some accidents were due to insufficient ground endurance, and some were caused by displacement of the landslide due to excavation near the foundation, or due to water accumulation. Producing uneven settlements, etc., and the like, can cause serious safety accidents. It must be highly valued by us. It must not be ambiguous. The stability of the tower crane is the ability of the tower crane to resist overturning. The biggest accident of the tower crane is dumping and collapse. When making the foundation of the tower crane, it must be ensured that the ground endurance meets the design requirements, and the strength of the reinforced concrete is at least 80% of the design value. Special measures should be taken for the tower crane foundation with basement engineering: some should be piled under the foundation, and the steel bars at the pile end should be firmly welded with the foundation anchor bolts. The bottom surface of the concrete foundation should be flat and compact, and the bottom of the foundation should not be formed into a pan bottom. The basic anchor bolt size error must be constructed in strict accordance with the requirements of the basic drawing. The anchor bolts should be kept enough to expose the length of the ground. Each anchor bolt should be pre-tightened with double nuts. The base surface should be treated before installation to ensure that the level of the foundation cannot exceed 1/1000. At the same time, the foundation of the tower crane shall not accumulate water, and the accumulated water will cause uneven settlement of the tower crane foundation. Do not dig pits or trenches in the vicinity of the tower crane foundation.
Xuzhou Jiufa Construction Machinery Co., Ltd. is a national high-tech enterprise specializing in R&D, manufacturing and operation of rough-terrain cranes and other construction machinery products. The company has a complete technical quality assurance management system, and passed the ISO9001 quality management system, ISO18001 occupational health and safety management system certification and CE certification, GOST certification. As the “Engineering Technology Research Center for Off-Road Tire Lifting Equipment” approved by the Science and Technology Department of Jiangsu Province, the company has established and maintained a long-term cooperation relationship with Jilin University. At present, the company has 56 patented technologies, including 15 invention patents and 41 utility model patents. The products mainly include QRY series off-road cranes, QY series truck cranes, DGY series multi-functional pipelayers, TQK series fast-moving self-erecting smart tower machines, self-loading and unloading intelligent sanitation vehicles and key parts of engineering machinery. Among them, DGY series multi-functional pipelayer and self-loading intelligent sanitation car have won global invention patents. TQK series fast moving self-erecting smart tower machine is the first product in China.
The QRY series of cross-country cranes independently developed by the company was recognized as “high-tech products” by the Science and Technology Department of Jiangsu Province and listed by the Ministry of Science and Technology as “National Torch Plan Industrialization Demonstration Project”. This series of models uses computer control technology, CAN bus technology, hydraulic pilot proportional control technology, electronically controlled shifting stepless shifting technology, four-wheel steering positioning detection technology and safety image monitoring system, making it a high-tech electromechanical Instrument integration products. This model adopts self-made special off-road chassis, imported axles, gearbox, four-wheel drive and synchronous steering, with high power and high passability. This model is fully hydraulically configured for continuous stepless shifting, crab walking, and heavy-duty driving. This model is suitable for construction in complex road conditions such as mountains and mines. It is also suitable for operation in small sites such as ports and freight yards. It can meet the special needs of different users in various industries for on-site lifting operations.
The company was founded in 2002 with a registered capital of 76 million yuan and a total investment of 300 million yuan. The company covers an area of more than 300 acres, and now has more than 100,000 square meters of standardized industrial plants and more than 9,000 square meters of scientific research buildings, more than 7,000 square meters of comprehensive trade buildings. Since its establishment, the company has successively invested in the purchase of flame cutting machines, laser cutting equipment, fine plasma cutting machines, large shearing machines, large leveling machines, large tonnage presses, 2500 tons of large-scale CNC bending machines and digital display. Horizontal double-sided boring and milling machine, Lincoln welding machine, standardized painting line, three-coordinate detector, welding flaw detector and other advanced machining and testing equipment, with annual production capacity of more than 3,000 sets of large-scale construction machinery and equipment production organization and processing capabilities.
The company is located in the industrial park of Dapeng Town, Tongshan District, Xuzhou City, Jiangsu Province, which is the capital of China’s construction machinery. It is adjacent to the 310 National Highway and the west exit of Xuzhou City Ring Expressway. It has excellent parts and components procurement market environment and developed convenience. Traffic location. At present, more than 95% of the company’s main QRY series of cross-country crane products are exported to foreign countries, mainly to more than 30 countries and regions such as Africa, South America, Middle East, West Asia, Southeast Asia and the Commonwealth of Independent States. For more details, please visit our official website http://www.xzjiufa.com/cn/