摘要:研究目的:控制横向贯通误差，保证隧道准确贯通是隧道控制测量的主要目的。目前洞外GPS网所引 起的横向贯通误差已大为减小，对隧道贯通起着决定性作用的是洞内控制测量的方法和精度。隧道洞内CP-I平面控制测量多采用导线形式，多余观测量少，图形强度低，横向摆动大，建网费用高且制约工期。针对上 述问题，本文提出一种基于自由测站边角交会网的CP-I测量及其数据处理的方法，并对建网方案、测量方法、精度控制及平差计算进行设计和研究。研究结论:( 1)本文提出的高速铁路超长隧道洞内CP-I测量方法可提高控制测量的精度和效率，控制点 采用强制对中标志，可消除对中误差，可永久保留；（2)该方法在某高速铁路上进行了现场试验，对比验证了 技术设计和研究的可行性，测量成果满足隧道二等的精度要求；（3)该研究成果可用于高速铁路超长隧道施 工控制，对现有规范的修改、补充和完善具有一定的参考价值。

Abstract ： Research purposes ： The main purpose of tiunnel control survey is to reduce the transverse breakthrough eror and to make sure the breakthrough of the tunnel. The transverse breakthrough error from GPS network outside the tunnel has been reduced sharply. The method and precision of control survey inside the tunnel has been of extreme importance for the breakthrough of the tunnel. Traversing has been usually used for CP-I horizontal control survey inside the long tunnel，which has many problems such as less observation，low graphic strength，lateral swing，high cost and low efficiency. A method of CP-I measurement and its data processing based on side - angle resection at freely - occupied stations has been presented in this paper. The design and research of the control network，the measurement method，the precision control and the adjustment have been made in this paper. Research conclusions:( 1) The precision and efficiency of control survey have been improved by the CP-I measurement metliod inside the super long tunnel of high - speed railway， which has been described in this paper. The forced centering markers，which can be permanently retained，had been used for the monuments of control points to eliminate the centering error. (2 ) The experiment has been carried out in a high - speed railway project. The measurement results of the method of CP-I measurement have verified the feasible of the technical design and research and can meet the tunnel 2nd order requirements of tHe specification. (3) It is proved that this method can be applied to the control survey of construction in high - speed railway super long tunnel， which is of great reference value to the modification，supplement and improvement of tlie existing specification.