CAJ | 학술논문

洞内支导线是隧道工程贯通测量的基本形式。针对支导线精度不能满足贯通允许偏差情况，研究了提高隧道工程贯通测量（特指洞内部分测量）精度的两种方法。结果表明：洞内支导线中加测多条陀螺定向边成为方向附合导线后，通过两个实例的贯通测量误差预计，以加测2条～3条陀螺定向边为宜，可提高贯通精度1倍～1.6倍；每条导线边加测陀螺方位角而成为陀螺定向-光电测距导线，结合6个实例的计算，贯通距离1200 m以上的隧道工程，贯通精度可提高2倍以上。
동내지도선시수도공정관통측량적기본형식。침대지도선정도불능만족관통윤허편차정황，연구료제고수도공정관통측량（특지동내부분측량）정도적량충방법。결과표명：동내지도선중가측다조타라정향변성위방향부합도선후，통과량개실례적관통측량오차예계，이가측2조～3조타라정향변위의，가제고관통정도1배～1.6배；매조도선변가측타라방위각이성위타라정향-광전측거도선，결합6개실례적계산，관통거리1200 m이상적수도공정，관통정도가제고2배이상。
In-tunnel branch traverse is a fundamental form in tunnel breakthrough survey.In order to address the problem of not meeting the standard of accuracy with acceptable error,this essay examines two ways of improving the ac-curacy of the survey ( for the in-tunnel part) .The result shows that by applying two or three directional annexed traver-ses after additional surveys of the gyrostatic orientation edges,the accuracy of breakthrough can be increased by one time to 1.6 times,according to two examples which estimate errors of tunnel breakthrough survey.After calculating the results of six examples,Tunnel breakthrough distance is 1200 meters above the tunnel project,it also indicates that the accuracy of tunnel breakthrough survey can be improved by at least 2 times if applying additional peg-top azimuth surveys to each edges of branch traverse,became the traverse of gyro-orienting and photoelectric distance-measuring.