Research and application of precise trigonometric leveling to replace second-class leveling achieving river-crossing leveling

doi:10.13474/j.cnki.11-2246.2019.0364

Abstract

Abstract: This paper analyses the theory and method, error source, and precision indexes of Precise Trigonometric Leveling. It discusses the key problems of using Precise Trigonometric Leveling instead of Second-Class Leveling in River-Crossing Leveling, and furnishes operating methods and requirements which employ two High-Precision automatic collimating total stations to carry out River-Crossing Leveling in opposite observational directions. Applications of the method in the construction of Chongqing Rail Transit Loop Line were conducted, proving that the Precision Trigonometric Leveling can meet the accuracy requirements of Second-Class Leveling under certain conditions, and it also brings high economic benefits.

Key words: Precise Trigonometric Leveling, Second-Class Leveling, River-Crossing Leveling, surveying robot, total station

CLC Number:

ZHANG Heng, HU Bo, YUAN Changzheng. Research and application of precise trigonometric leveling to replace second-class leveling achieving river-crossing leveling[J]. Bulletin of Surveying and Mapping, 2019, 0(11): 121-125.

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