Highway reorganization and expansion surveying method

Abstract

The invention discloses a highway reorganization and expansion surveying method and relates to the fields of surveying and mapping and highway engineering design. The method comprises the following steps of: laying a ground target control point, and acquiring a three-dimensional space coordinate; performing vehicle-mounted movable laser scanning measurement, and acquiring a vehicle-mounted measured original data result; taking the three-dimensional space coordinate of the ground target control point as a reference, performing data processing on vehicle-mounted point cloud in the vehicle-mounted measured original data result, and acquiring a high-precision vehicle-mounted ground point cloud; establishing a first triangulation network for the high-precision vehicle-mounted ground point cloud, and generating a highway pavement digital elevation model; performing survey area vehicle-mounted LIDAR aerial survey, and acquiring a vehicle-mounted measured original data result; acquiring a digital elevation model and a high-precision central pile cross section map by using a 1:2000 measuring scale according to the vehicle-mounted measured original data result; and taking the vehicle-mounted measured original data result as the basis, and manufacturing digital line graphs by using the 1:2000 measuring scale in a respective 300m range on two sides of the highway by integrating the vehicle-mounted ground point cloud and digital aerial photos.

Description

technical field [0001] The invention belongs to the field of surveying and mapping and highway engineering design, and in particular relates to a survey method for expressway reconstruction and extension. Background technique [0002] With the rapid development of economy and society, the traffic capacity of expressways in the central and eastern regions has been saturated, and there is an urgent need to speed up the reconstruction and expansion of expressways. Among them, the highway reconstruction and expansion survey work is the basis and important link of the entire reconstruction and expansion work, and is closely related to the construction period, quality and efficiency of the highway reconstruction and expansion project. The highway reconstruction and expansion survey method in the prior art mainly adopts engineering survey and traditional digital aerial photogrammetry technology. [0003] During the inventor's implementation of the present invention, he found that ...

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Problems solved by technology

[0004] (1) There are many shortcomings in engineering survey, such as heavy workload, high project cost, long operation cycle and high labor intensity, which cannot meet the requirements of low cost, short construction period, high precision and quality for survey and design work of the expressway reconstruction and expansion department. high-level requirements;

[0005] (2) Engineering surveys require field surveyors to work on the highway. In order to meet the requirements of the survey work, one method is to temporarily close the survey section to ensure the safety of the field surveyors. However, this operation method has seriously affected The normal operation of the expressway transportation management department has had a relatively large negative impact on the normal operation of the economy and society; another method is not to close the expressway, and the operators work on the expressway road surface, and only carry out warning reminders on the working section, but due to the expressway The speed of the vehicle is fast, and this operation method is difficult to ensure the safety of the field surveyors, and there is a great potential safety hazard;

[0006] (3) Traditional digital aerial photogrammetry adopts stereo mapping method to collect 3D terrain on the ground, which has a low degree of automation and the accuracy of the extracted terrain elevation is poor. The accuracy requirement of an error of 0.1 meters in the elevation of the cross-sectional diagram of the middle pile in the survey stage naturally cannot solve the requirements for the cross-sectional survey of the middle pile in the later stage

[0007] When methods such as engineering survey and traditional aerial photogrammetry are used in the survey process of expressway reconstruction and expansion, there are inevitably problems such as hidden dangers in operation safety, impact on on-site traffic, high project cost, long development cycle and low product accuracy.

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