• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 15 Issue 6
Dec.  2002
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Article Contents
HAO Chuan-cai, LIU Cheng-long. The Feasibility of Trigonometric Height Survey for Replacementof Order Levelingin Wide Network of Rivers[J]. Journal of Southwest Jiaotong University, 2002, 15(6): 637-641.
Citation: HAO Chuan-cai, LIU Cheng-long. The Feasibility of Trigonometric Height Survey for Replacement of Order Levelingin Wide Network of Rivers[J]. Journal of Southwest Jiaotong University, 2002, 15(6): 637-641.

The Feasibility of Trigonometric Height Survey for Replacement of Order Levelingin Wide Network of Rivers

  • Publish Date: 25 Dec 2002
  • Based on a statistics analysis of the experimental data of trigonometric leveling networks at four extra-long bridges such as the Humen bridge, etc., comparisons are made in forward and backward altitude differences, loop closures, the third-and the fourth-grade-leveling surveys difference limitations, and the altitude differences between trigonometric height survey and order leveling at common points. It is verified that in networks of rivers, using trigonometric height survey to replace the fourth-grade-leveling is completely feasible for the leveling measurement of crossing rivers, but when using it to replace the third-grade-leveling, the reliability is only about 75%.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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