Airborne laser measurement-based highway reconstruction and expansion investigation method

Abstract

The invention discloses an airborne laser measurement-based highway reconstruction and expansion investigation method. The method comprises the following steps of: A, acquiring information of an existing highway through laser measurement by taking a helicopter as a platform according to a design route scheme and designing a flying task; B, arranging and measuring road surface control points; C, extracting an accurate lane line by a man-machine interaction mode and using strength information of a laser dot; D, fining a plane and elevation of original road surface laser dot data by using the road surface control points and the extracted lane line, and fining the extracted lane line laser dot data at the same time; and E, fitting and restoring form elements of the existing highway. The method of the invention quickly and accurately acquires three-dimensional spatial information required for the construction of a highway reconstruction and expansion project under the condition of not interrupting the traffic, so the manual measurement on the highway is replaced, the personal safety of the measurement personnel is ensured to the greatest extent, the outdoor workload is extremely reduced, the working efficiency is greatly improved and obvious economic benefit and social benefit are achieved.

Description

technical field [0001] The present invention relates to the technical field of highway survey and design, and more specifically relates to a highway reconstruction and expansion survey method based on airborne laser measurement. The needs of highway reconstruction and expansion under traffic conditions. Background technique [0002] Since the 1980s, the construction of expressways in our country has developed vigorously, and it has been nearly 30 years so far. However, with the continuous and rapid development of the social economy, the traffic volume of expressways is increasing day by day, and many early-built expressways can no longer fully meet the needs of today's traffic volume development, such as Shenyang University, Guangfo, Shanghai-Nanjing, Beijing-Tianjin-Tang and Beijing-Hong Kong-Macau expressways, thereby restricting economic and social development. It is estimated that in the next five to ten years, at least one-third of the more than 40,000 kilometers of e...

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Problems solved by technology

[0004]1) A large number of manual on-road measurements have huge potential safety hazards: it is necessary to carry measuring instruments for on-road measurements, and vehicles traveling fast on the road can easily lead to traffic accidents, which constitute major safety hazards;

[0005]2) Interference with normal traffic order: Due to the need for manual on-road measurement, and the measurement points are distributed in different parts of the road, it is impossible to avoid interference with normal road traffic order;

[0006]3) The measurement workload is heavy: according to a certain section spacing, it is necessary to perform multiple measurements on the median strip, road surface, subgrade boundary, and side slope of each section The manual measurement of the points requires a considerable workload;

[0007]4) The measurement progress is slow: manual measurement is inefficient and easily restricted by road conditions, weather and other conditions;

[0008]5) High cost of measurement: due to the need for a large number of field operations, the cost of manpower and material resources is high

[0009]It is not difficult to find that the existing highway reconstruction and expansion measurement technology is difficult to meet the increasing demand for highway reconstruction and expansion in terms of efficiency, safety and cost

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