超长多折线型土石坝变形监测分析坐标系统的建立

针对石佛寺水库大坝超长（需观测坝段20.6 km）并由多段折线坝体所构成的地形与坝形特点,研究超长多折线土石坝变形分析工程坐标系建立的理论和方法。利用自定义的中央子午线和椭球体,建立了基于WGS-84的实用水坝工程坐标系,各折线段坐标系既有联系又自成独立坐标体系,保证了各折线段坝体变形量的显示的一致性与直观性,为大坝变形自动分析系统的建立以及大坝的自动安全预警奠定了基础,该方法监测精度高,变形量显示直观一致,适合于多折线型超长坝体的自动化变形监测系统的建立。

Study of deformation monitoring analysis coordinate system for super-long zigzag earth-rock dam

Stone Buddha Temple Reservoir was designed with an super-long dam which has 20.6km-long dam sections in need of observation and consisting of multiple zigzag dam segments.In view of the topographical features and dam shape,the author studied the theory and method of setting up engineering coordinate system for super-long zigzag earth-rock dam deformation analysis.Practical water retaining dam engineering coordinate system based on WGS-84 was set up by use of custom central meridian and ellipsoid.The coordinate systems of all zigzag segments are both independent and correlated,which ensures consistent and visual deformation indication of all dam segments,and contributes basis for construction of dam deformation automatic analysis system and dam safety automatic alarm system.With high accuracy,consistent and visual deformation indication,this method is fit for automatic deformation monitoring system of super-long zigzag dam body.