【摘要】 对西康铁路大瓢沟隧道工程施工控制网的布设方案和观测技术进行了讨论，较准确地估算隧道的贯通误差，得出该隧道的平面施工控制网的测量成果，并详细探讨了精密工程控制网的等级划分、网形、点位、边长和角度。更多还原

【Abstract】 The overall arrangment and observing technical of Dapiaogou valley tunnel engineering web to control in Xikang raiway are discussed Its gained to the surveying results in the tunnel plane controlling and estimated to link up error It is discussed the grade to be divided, net, point, side and angle of accurate engineering and controlling web to are studied in detail更多还原