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Application Of GPS In Road Engineering

Traclogis Co.,Ltd | Updated: Aug 11, 2016

Application of GPS in road engineering, are mainly used to build a variety of road engineering control network and determination of aerial survey control points, and so on. With the development of high-grade Highway, higher demands on investigation techniques, because the line is long, to know, therefore, not only by means of routine measurement networks difficult and it is difficult to meet the requirement of high precision. At present, the heads have already started using GPS technology to establish a line of high-precision control network and laying wire encryption using conventional methods. Practice has proved that point error is only in the range of dozens of kilometres about 2 cm, reach the precision of conventional methods difficult to achieve, but also greatly earlier period. GPS technology is also used in the control survey of extra large bridge. Because there is no visibility, could constitute a strong network, increased positional accuracy, while the detection routine measurement of the fulcrum is also very effective. GPS technique in measurement of tunnel also has a wide range of applications, GPS measurements without visibility, reduces the conventional method of intermediate links, therefore, high speed, high precision, with significant economic and social benefits.

In road engineering, GPS is mainly used to build a variety of road engineering control network and determination of aerial survey control points, and so on. The rapid development of Highway reconnaissance technology put forward higher requirements, because the line is longer, less known point, therefore, not only by means of routine measurement networks difficult and it is difficult to meet the requirement of high precision. At present, the heads have already started using GPS technology to establish a line of high-precision control network, such as Shanghai and Nanjing, the Shanghai section of the Shanghai-Hangzhou Expressway is using the GPS, a primary control network and laying wire encryption using conventional methods. Practice has proved that point error is only in the range of dozens of kilometres around 2cm, reached the precision of conventional methods difficult to achieve, but well ahead of schedule. Mapping Bureau of Zhejiang Province with Wild200GPS receiver in fast static positioning function, all the preliminary measurement of the measured line wires, fast, high-precision built hundreds of kilometers of Highway control network, good results have been achieved.

GPS control surveying technology has also been used in large bridges. Because there is no visibility, could constitute a strong network, increased positional accuracy, while the detection routine measurement of the fulcrum is also very effective. Such as in the construction of Jiangyin Yangtze River Bridge, first established by the conventional method of high precision angle NET and use GPS to test the network, GPS detection millimeter-scale accuracy, good agreement compared with conventional precision network. GPS technique in measurement of tunnel also has a wide range of applications, the measurement without intervisibility, link reduces the normal way and, therefore, fast speed, high precision, with significant economic and social benefits.


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