The most popular XCMG fourth generation pavement m

2022-07-24
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XCMG's fourth generation road machinery fully guarantees the smooth traffic lifeline of Yushu

XCMG's fourth generation road machinery fully guarantees the smooth traffic lifeline of Yushu

China Construction Machinery Information

Guide: Lake in the clouds, road in the sky. Standing on the Qinghai Tibet plateau at an altitude of 4500 meters, looking from afar, this is our first visual impression. The winding mountain road and the straight plateau road that seems to have no end remind us that here is the only road from Xining to Yushu, 214 countries

Lake in the clouds, road in the sky

standing on the Qinghai Tibet plateau at an altitude of 4500 meters, looking from afar, this is our first visual impression. The winding mountain road and the straight plateau road that seems to have no end remind us that this is the only road from Xining to Yushu - National Highway 214

214 national highway, which leads from Xining to Yushu, Changdu, Shangri La, Lijiang, Dali and Xishuangbanna, is known as "the most beautiful national highway in China". Because of the 4 · 14 Yushu earthquake, it immediately became a "life channel" leading to Yushu disaster areas all over the country. However, due to the constant attack of plateau diseases all the year round and the sharp doubling of traffic flow, the already fragile roads are "scarred". In order to ensure the continuous smoothness of this "life passage", it is urgent to repair this road quickly and efficiently. A batch of construction machinery and equipment with reliable performance and able to withstand the severe conditions on the plateau are the most important among them. The timely emergence of XCMG's fourth generation pavement equipment makes all problems solved

on June 27, 2010, we drove 8 hours from Xining to Maduo County, Qinghai Province, the only way from Xining to Yushu (National Highway 214), to visit the emergency communication project of national highway 214. At the same time, we also witnessed the "high-altitude operation" of the fourth generation pavement machinery and equipment just launched by XCMG in 2010 on the plateau with an altitude of 4500 meters, escorting this lifeline to Yushu disaster area

background and overview of emergency communication project

after the Yushu earthquake, the government decided to invest in the construction of the expressway from Xining to Yushu (the project has been started at present). However, due to the fact that the section is located in a plateau and the terrain and climate are very complex, it is expected that it will take years for the expressway to be fully opened to traffic. During this period, the reconstruction of Yushu after the disaster cannot be delayed for a moment. It is estimated that when the experimental force is applied to more than 13kn points, Yu hears a loud noise. The material transportation demand for the three-year reconstruction after the tree disaster exceeds 23million tons, and it will reach about 32000 tons per day during the construction period. As Yushu is located in the core protection zone of Sanjiangyuan, there is no local building material production enterprise and there is no railway. A large number of reconstruction materials must be transported by road. Therefore, national highway 214 will become the main channel for material transportation for Yushu post disaster reconstruction in the coming years, and its importance is self-evident. However, the Xining Yushu section of national highway 214 is located in the Qinghai Tibet Plateau. The section with the highest altitude reaches 4500m, resulting in unstable foundation of some sections, mud boiling and damage to the pavement surface. Once it is impacted by rain, the water inflow of the pavement is serious, causing great damage to the pavement surface. At the same time, in recent years, the precision of the front and rear bearings of the hydraulic system of the tensile testing machine is not high enough or has been damaged. For months, the number of heavy transport vehicles to Yushu disaster area has doubled, and some sections have already been overwhelmed. While not affecting the traffic of transport vehicles, the fastest way to ensure the smoothness of the road is to pave modified asphalt on the original road surface, which is the most efficient solution

the whole national highway 214 emergency communication project is more than 300 kilometers long, starting from Mount ELA and ending at Qingshui River. The project is divided into three bid sections: the construction unit of bid section a is Qinghai highway construction and maintenance Corporation, the construction unit of bid section B is Qinghai Zhengping road and Bridge Group Co., Ltd., and the construction unit of bid section C is Qinghai Road and Bridge Construction Co., Ltd. each bid section is about 100 km

The display and operation functions of the 4500m altitude control panel should be intact on the plateau. XCMG has formed a set of pavement machinery to guard the "life channel"

at the construction site of bid section B, which is more than 10 kilometers south of Maduo County, Qinghai Province, we see the same XCMG equipment: 1 XCMG large-scale intelligent paver, 1 XCMG 13 ton double steel wheel roller and 1 XCMG large tonnage rubber wheel roller are under intense construction. Yuchengshou, the project manager of Qinghai Zhengping road and Bridge Group Co., Ltd., the Construction Party of this bid section, introduced to us: "in order to ensure that the emergency communication project of national highway 214 undertaken this time is safe in construction, Zhengping road and Bridge purchased a complete set of brand-new pavement equipment for this project, and XCMG products have always been our preferred brand." According to our understanding, the whole construction has just started on June 11. After the operator and XCMG equipment experienced a short running in period, Mr. Cao, deputy manager of Zhengping road and bridge project, told us about the use of the equipment: "our task in the first two months is to pave the 16.8 km section of the whole bid section (about 100 km) with the most serious disease, which is also our most important and arduous task in 2010."

in the paving construction of asphalt surface course, the paving thickness of most sections of the whole line is about 10cm. During the construction process, from asphalt paving, oil surface paving to pavement compaction, XCMG pavement machinery and equipment completed the task excellently

different from the construction on the plain, the construction on the plateau at an altitude of 4500 meters is accompanied by many problems, such as hypoxia, low pressure, low temperature, strong ultraviolet and so on. According to manager Yu, the general construction machinery and equipment can not be used at all. At an altitude of nearly 4800 meters, the oxygen content in the plain is less than 50%. If these problems can be overcome by human will, the machine will "strike" because it cannot start normally due to lack of oxygen. The main performance is that the engine can not be started due to low temperature and reduced cylinder inflation; Due to the dual influence of the engine external characteristics decline and the matching error, the mechanical traction performance and speed decline, which is manifested as weakness, slow action, heating, increased fuel consumption and emission deterioration, resulting in a serious decline in the power, speed, economy and production efficiency of the whole machine. These severe tests put forward new requirements for the configuration, type selection, use and maintenance of construction equipment. XCMG's fourth generation road machinery has done enough "homework" in this regard: it is equipped with a turbocharged engine to realize cold start; Through pressurized air supply, increase the charge density of the cylinder to improve the excess air coefficient, so as to achieve the full combustion of fuel in the cylinder, restore the average effective pressure and restore the power; Seals and rubber parts made of special materials and exposed rubber parts shall be used for protection to solve the problem of material aging caused by high radiation, low temperature and large temperature difference; The cab is made of anti ultraviolet glass, which can filter more than 70% of ultraviolet rays, solve the problem of plateau radiation, improve the comfort of the cab, and ensure the physical strength and safety of the driver. Based on this, the construction party decided to use XCMG pavement machinery for the whole line

Zhengping road and Bridge - "die hard fan" of XCMG equipment

Zhengping road and Bridge Group Co., Ltd. is the largest private road and bridge construction enterprise in Qinghai Province. Nearly 40% of the pavement projects in Qinghai Province are completed by Zhengping road and bridge. For such a powerful construction unit, what kind of "construction weapon" to choose is a powerful guarantee for the sustainable development of the enterprise in the future. Yuchengshou, project manager of Qinghai Zhengping road and Bridge Group Co., Ltd., told us: "Just in 2010, Zhengping road and Bridge purchased two XCMG rp951a pavers, one rp1356 paver, two XCMG xp262 rubber wheel rollers, and two XCMG xd131-ii double steel wheel rollers. The rp132 paver 56 from the end of 2012 to the beginning of 2013 is the fourth generation of pavement machinery products newly launched by XCMG in 2010. If you want to count the current number of XCMG equipment, it will be hard to say for a while. In fact, it is a few meters away from the construction site There is also a XCMG 2000 large asphalt mixing station standing at km. The asphalt required for this paving is mixed by this "big guy". We are also full of curiosity about such a dedicated XCMG product fan

manager Yu Chengshou further said to us: "XCMG's equipment was first used in the construction of the Qinghai Tibet Railway five or six years ago in Zhengping road and bridge. Before that, our pavement equipment has always been foreign brand equipment, especially pavers and rollers. We have no idea about using domestic brands. However, after the construction of the Qinghai Tibet railway, our original concept has been changed. XCMG's equipment has shown no high stability and reliability in the Qinghai Tibet Plateau with an altitude of more than 5000 meters It is inferior to foreign brands, and its price is far lower than that of many foreign brands. Moreover, under such extreme conditions, XCMG sent a large number of service personnel to the construction site to solve any possible problems of equipment during construction, which particularly touched us. After that, we will add a batch of XCMG equipment almost every year. XCMG pavers alone have more than 10 sets of pavers ranging from 7 meters to 13 meters. It can be said that over the years, Zhengping road and bridge has also witnessed several technical upgrades and product updates of XCMG pavement equipment, and XCMG equipment has also witnessed the continuous development and growth of our enterprise. "

in fact, in the emergency communication project of national highway 214, not only Zhengping road and Bridge in bid section B has a complete set of XCMG equipment. We can see XCMG equipment along the road from Xining to Maduo as long as there is a road section for pavement construction. Yuchengshou also told us that Qinghai Road and Bridge Construction Co., Ltd., which is responsible for bid section C, has no less XCMG equipment than Zhengping road and bridge. As the largest road and bridge construction enterprise in Qinghai Province, Qinghai Road and Bridge Construction Co., Ltd. is also the sole XCMG equipment undertaking the construction of section C of Baotong line. In fact, it also reminds us that it is not only the national highway 214 emergency communication project, but also the whole Qinghai Tibet plateau where XCMG equipment is active. They are paving the road of hope and happiness for the most magical land in China

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