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Method for surveying and mapping transverse section of gully

A cross-section and gully technology, which is applied in the surveying and mapping field of the cross-section of the trench, can solve the problems of difficult placement of track rails, inconvenient carrying, high requirements for the length and strength of track rails, and achieves easy recording, convenient surveying and mapping, and accurate surveying and mapping Effect

Inactive Publication Date: 2013-08-14
CHINA WEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the rectangular coordinate method can accurately survey and map the cross-section of gullies, it has insurmountable shortcomings. It is generally suitable for surveying and mapping of gully cross-sections that are not too wide, such as those within 5m. For gullies that are wider than 5m, It is not only difficult to place the track crossbar, but also requires high length and strength of the track crossbar, and it is extremely inconvenient to carry when working in the field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for surveying and mapping a gully cross section, comprising the steps of:

[0021] ① Select the cross-section of the gully to be measured, select the cross-section of the gully to be measured, [Dr. Zhang1] (millimeter level is best) and set up the slope meter at any position inside the cross-section of the gully, adjust and fix the optical distance measurement instrument, so that the optical range finder rotates vertically along the cross section of the gully. The bracket can be single-legged, double-legged or tripod, especially the camera tripod can be used directly to fix the optical rangefinder and inclinometer on the camera tripod head, and fix the optical rangefinder so that it is on the horizontal plane It cannot be rotated, and the optical range finder can only rotate vertically along the cross section of the gully. The optical range finder should choose an infrared range finder or a laser range finder, preferably a laser range finder.

[0022] ②Selec...

Embodiment 2

[0026] A method for surveying and mapping a gully cross section, comprising the steps of:

[0027] ① Select the cross-section of the gully to be measured, and set up the optical rangefinder and slope meter with a bracket at the bottom of the gully cross-section. The bracket can be a single-legged or double-legged stand. It is best to use a tripod, especially a camera tripod directly. Fix the optical rangefinder and the inclinometer on the pan / tilt of the tripod, fix the optical rangefinder so that it cannot rotate on the horizontal plane, and the optical rangefinder can only rotate vertically along the cross section of the gully. The optical range finder should choose an infrared range finder or a laser range finder, preferably a laser range finder.

[0028] ② Select a certain feature point A of the gully cross section. The so-called feature point is the point used for measurement on the side wall of the gully cross section. This point is arbitrary; adjust the optical range f...

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Abstract

The invention discloses a method for surveying and mapping a transverse section of a gully. The method comprises the following steps of: selecting a certain characteristic point of the transverse section of the gully; adjusting a distance meter; measuring the distance L between the characteristic point and the distance meter; measuring an inclination angle theta between the characteristic point and an optical distance meter by using a gradiometer; measuring the distance L and the inclination angle theta between each of a plurality of characteristic points on two side walls and at the bottom of the transverse section of the gully and the distance meter; drawing each characteristic point by using a drawing tool; sequentially connecting the plurality of characteristic points through a smooth curved line; and drawing the shape of the transverse section of the gully. Heavy track transverse rods do not need to be carried. The wide transverse section of the gully can be surveyed and mapped conveniently and accurately without blind areas and blind points.

Description

technical field [0001] The invention relates to a geological surveying and mapping method, in particular to a surveying and mapping method for a trench cross section. Background technique [0002] Gullies are grooves formed by the erosion of intermittent water on the surface. Gullies cut the land and make it fragmented, making it difficult to use the land. In gully-developed areas, water and soil loss will bring more difficulties to construction. Erosion can occur when gullies cut into the surface by erosion from accelerated water flow, when natural vegetation that protects the soil is destroyed by human activity, fire or climate change, or by flash floods brought on by normatively rare torrential rains. For weak rocks, gullies grow rapidly due to source erosion, and if no preventive measures are taken, a large amount of arable land will be destroyed. Accurate surveying and mapping of gully sections is the basis for calculating soil erosion and identifying the evolution pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C7/06
Inventor 张斌罗明良覃发超邓青春林叶彬王海鹏刘守江
Owner CHINA WEST NORMAL UNIVERSITY
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