(石家莊鐵道學(xué)院交通工程系， 石家莊 050043)
摘 要: 運(yùn)用協(xié)方差理論，對影響機(jī)械式收斂計量測隧道凈空收斂精度的各種誤差來源進(jìn)行了嚴(yán)密的分析與論證， 結(jié)果發(fā)現(xiàn)基線長度的量測標(biāo)準(zhǔn)差對各測點(diǎn)的收斂量的影響可忽略不計。
關(guān)鍵字: 隧道凈空收斂 絕對收斂量 相對收斂量 標(biāo)準(zhǔn)差
（Department of Jiaotong Engineering, Shijiazhuang Railway Institute, Shijiazhuang 050043）
Abstract:The sources of all sort of error that affect the accuracy of measuring construction gauge of tunnel with mechanical convergence meter, were analysed and argufied strictly by appling the variance theory in this paper. The result indicates that the measurement standard deviation of base line is inconsiderable to convergence value of every measuring point.
Key words: convergence of tunnel construction gauge absolute convergence value relation convergence value standard deviation
