摘要
本文讨论了大地形变测量中应变计算方面的一些问题。本文说明,虽然三维大地测量技术将会在大地形变测量中得到应用,但即使采用三维测量技术,大地形变测量一般只能得到地表的倾斜与二维应变。文中给出了三维测量中边长与天顶距变化同应变与倾斜的关系式。从目前大地形变测量的实际出发,本文详细讨论了常规测量中应变计算的各种情况,指出今后会出现二维与三维大地形变测量观测值联合处理的情况。本文讨论了应变量精度估计问题,给出了详细的实用估计公式。
In this paper some problems in calculing strain components from geodetic data are discussed. Though new techniques of 3-D geodetic survey will be used in geodetic deformation survey, only strains in 2-dimension and tilt on the earth surface can be obtained. Equations for strains and tilts obtained from changes in line length and zenith distance are given. Different cases of strain calculations in conventional surveys are discussed in a detailed and systematic way for practical use. Some Practical formulas for estimating the standard deviation in strain components are given. It is pointed out that treatments of combined 2-and 3-dimensional data will be a practical problem in near future.
出处
《地壳形变与地震》
CSCD
1989年第1期38-45,共8页
Crustal Deformation and Earthquake
