2 The status and role of highway traffic in the development of western China and the construction of highways in Shaanxi Province The western region covers 10 provinces and cities, with a total area of ​​5.4 million renminbi, accounting for 56.8 of the country, with a population of 286 million, accounting for 23.1% of the country. As of the end of 1998, The mileage of highways is more than 380,000 km, and the highway density is 7,100 claws. The proportion of roads in the administrative villages of Tongxiang Township is divided into the main transport modes of roads and railways. The highway mileage accounts for more than 90, and the passenger and freight transport volume of road transport accounts for nationals respectively. 94.2 and 87.6 of comprehensive economic transportation, passenger and cargo transport turnover accounted for 61.6 and 34.3, respectively, both higher than the national average. Road transport in the western region will greatly accelerate the development of the national economy and improve the people's cattle. Living standards play an important role and occupy a leading position in comprehensive transportation. The central government will give priority to the development of highway infrastructure in the implementation of the strategy for the development of the western region in order to adjust the regional economic structure and promote the coordinated development of the urban and rural economy in the regional economy. It is directly related to the expansion of domestic demand, the promotion of economic growth, and the stability of national unity and the consolidation of border defense. This is related to the coordinated development of the western region and the ultimate goal of achieving common prosperity. The development of the Western Han Dynasty is a grand project of system engineering. It must be planned in an integrated manner, focus must be given, and steps must be implemented in batches. In the large-scale development of the western region, in order to give priority to the development of road traffic construction, from now until 2010, China will basically complete the construction of the main road of the national highway and the large-aisle project of the Central Government. According to the requirements of the Central Economic Work Conference to speed up the transportation corridors connecting the southwestern region of the western region and the central and eastern regions with the northwest region of Tongjiang and Dahai, relying on the main line of the national highway will build 15,000 km above highway level. As a transportation hub that integrates the eastern and western regions, Shaanxi Province adapts itself to the strategy of large-scale and high-speed development of highways and the implementation of the Central Government’s strategy for the development of the western region in the development of the western region, forming Xi’an as the center and highways passing through nine provinces in the province. The location and the existing 13 cities, highways above the level of the county through the province's base pattern. The highway's main skeleton composed of expressways will be built with the surrounding provinces and cities' highways, forming an accessible road network, enabling Xi'an to arrive at Taiyuan, Shijiazhuang, Zhengzhou, Wuhan, Chongqing, Chengdu, and Lanzhou, Baotou, central cities. In the daily traffic circle, the main roads above the level will connect the province's high-tech and high-tech areas and the tourism scenic energy 1 base and agricultural and forestry fruit specialty production bases. To achieve the above goals, Shaanxi will invest 230 billion yuan in highway construction in the development of westerners. By the end of the tenth year, the length of highway construction in the province reached 4,800,1 of which 1223 were highways and 120 km highways. By 2010, the province’s highways will reach 52,000 km, of which, during the large-scale development of western China, Shaanxi Province will continue The longest Qinling Zhongnanshan Highway Tunnel and the Maowusu Desert Expressway in China contribute to the economic take-off of the west and Shaanxi. Highway construction requirements for modern construction machinery Road construction, especially in recent years with China's rapid economic development needs, China's expressways have been rapidly developed, and the transportation industry has entered a new historical period. The expressway is fully enclosed and fully enclosed. There are at least lanes of high-grade highways exclusively for automobiles. The juice-making vehicles can reach speeds of up to 120km/h, and there are perfect facilities for transportation and transportation. The highway is characterized by a high economic efficiency. Due to the high speed of highways, the speed can reach 80,120 per hour, which is 13 times faster than the normal speed. It is characterized by large capacity, short operating time, low transportation cost, etc. Therefore, it promotes 1 automobile transportation, large-scale drag-down containerization and specialization of Fangdian development. Speed ​​up the passenger and cargo transport efficiency and capital turnover, which is conducive to the improvement of the economic benefits of commodity circulation and transportation. 2 There are few traffic accidents. Because the highway is straight and wide, there are separate belts in the middle, fully enclosed and full-fledged, and the use of modernization is reduced. 3 High social benefits. Due to the large amount of traffic on the expressway, it can reach more than 40,000 vehicles per day and night. The phase-to-line highway has the ability to pass through, and the transportation efficiency is much higher than that of the highway. Therefore, the construction of highways is the development of highway traffic in all countries of the world. Because of the high design requirements and strict quality requirements of highways, modern highway construction machinery must be used for construction and maintenance. It can not only improve the labor environment, but also reduce labor intensity. It is to ensure the quality of the project and improve work efficiency. According to the requirements of highway construction design specification and related standards, manual construction cannot be achieved. If heavy-duty vibratory rollers are used in subgrade construction, heavy compaction standards can be met. The construction of the road surface grass-roots stratum is stabilized. Due to the use of plant mixing equipment, the mixing uniformity and work efficiency of various stabilized soils are greatly improved, thereby ensuring the quality and efficiency of the construction of the road surface. Another example is the development of asphalt paver with double hammers in recent years. It not only paves the way for paving concrete roads, but also paves the way for paving hard and stable soil materials, which enables mechanized construction of pavement paving and guarantees construction quality. Improve ergonomics. In China, the construction of the road surface with an evenness and degree of compactness of 1 in the early stage was completed using modern construction machinery, which fully shows the importance of construction machinery in road construction. The current status of China's highway construction machinery At present, from the current situation of domestic construction machinery, after 50 years of rapid development, we have successfully developed a variety of construction machinery with a wide range of specifications and small sizes, which are basically adaptable to varieties and landscapes. Highway construction and maintenance requirements, and spit, its prices are lower than similar imported products, has a very good market prospects. However, judging from the matching of equipment, except for a few economically developed regions in China, the overall level is not high, and development is unbalanced. With the large-scale development of the western region, the scale of highway construction is huge, which has brought a vast market and full use of space for the use of modern construction machinery. Due to the development of domestic highway construction machinery technology, in some key technologies, foreign advanced technologies and devices have been introduced and adopted, and innovations have been made. Therefore, we suggest that, in terms of model selection, domestic products should be used on the premise of satisfying construction technical requirements, not only at a low price but also with good after-sales services. The special requirements of western development on construction machinery The western region has a vast territory, with complex topography and climate. In the construction of highway infrastructure, special requirements have been put forward for construction machinery. The engine is developed into a high-power diesel engine in the direction of high-power diesel engines. It is manufactured in low-wood, low-hour oil consumption, convenient driving, and low maintenance costs. I have been able to produce 235kW bulldozers with cattle, combined with the development of the western region can be developed to more power in order to improve operating efficiency. To solve the problem of low temperature of construction machinery in winter, the winter temperature in the western region is relatively low. In the areas of Qinghai, Gansu, and Tibet in northern Shaanxi, winter field sites sometimes reach minus 40, which causes great difficulties for engine start-up. The question of solving the engine's low temperature start is an important lesson in our current. Resolve the power drop caused by lack of oxygen in the mechanical engine used in the western highland area. In the western Qinghai-Tibet Plateau, the air is thin, the oxygen in the engine air is low, the combustion pressure is reduced, the power is reduced, and it is not normal. It is a construction machine. Facing the reality Q4 Implementing the decision of the CPC Central Committee and State Council on strengthening technological innovation, developing high technology, and realizing industrialization> The spirit must be in the process of research and development of engineering machinery, for some core technologies, such as the transmission torque converter And hydraulic control systems, etc., while adopting advanced foreign technologies and equipment, we must organize production, education and research to jointly tackle problems, and increase investment in high-tech development, and strive to develop and develop our own patented technologies and products with world-leading standards. Enhance the competitiveness of construction machinery in the international market, and gradually get rid of the core technology in construction machinery products rely on the passive situation of imported components, improve the high-tech content of China's construction machinery, and compete with famous foreign brands, for the development of the western region. Make more contributions. Introduction to Keysight Division 5 Keys Corporation was established in 1842, has a sound R & D production and sales system, in the world there are ten children manufacturing plant. In 1957, Case developed an innovative world-first backhoe loader. Through a worldwide distribution network, we provide users with a wide range of hydraulic excavators, wheel loaders, crawlers, crawlers, backhoes, loaders, skid steers, professional trenchers, horizontal directional drilling rigs, and multi-functional machines. Case Machinery Shanghai Co., Ltd. is the headquarters of Case's China business. 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