CAJ | 학술논문

针对山区隧道施工过程中高程贯通测量实施困难的问题，提出GPS跨山岭传递高程的方法，该方法主要对GPS静态控制网进行二次平差计算点位高精度的大地高，EGM2008重力场模型计算点位的高程异常，由GPS点位的大地高和高程异常联合计算正常高，从而将高程从隧道的一端洞口跨越山岭传递到另一端洞口．选取阳泉左权高速公路凤居隧道进行试验，将GPS跨山岭传递的高程与水准实测高程进行比较，结果表明，GPS传递高程在跨越2至4 km山岭高程测量的标准差为0．0123 m，以EGM2008重力场模型为辅助的GPS传递高程可以满足隧道施工高程贯通误差的要求．
침대산구수도시공과정중고정관통측량실시곤난적문제，제출GPS과산령전체고정적방법，해방법주요대GPS정태공제망진행이차평차계산점위고정도적대지고，EGM2008중력장모형계산점위적고정이상，유GPS점위적대지고화고정이상연합계산정상고，종이장고정종수도적일단동구과월산령전체도령일단동구．선취양천좌권고속공로봉거수도진행시험，장GPS과산령전체적고정여수준실측고정진행비교，결과표명，GPS전체고정재과월2지4 km산령고정측량적표준차위0．0123 m，이EGM2008중력장모형위보조적GPS전체고정가이만족수도시공고정관통오차적요구．
Aiming at the difficulty of height through survey in the course of montanic tunnel con-struction, the method of span-ridge GPS( global positioning system) height transmission is proposed. In this method, the high-precision geodetic height is obtained by two-step adjusting of GPS static control net.The height anomaly can be calculated by EGM2008 gravity field model.The normal height of the GPS points are obtained from the geodetic height and the height anomaly.Thus, the heights are transmitted from one portal to another portal of the span-ridge tunnel.The experiment is executed at the Fengju tunnel on Yangquan-Zuoquan freeway.The height of span-ridge GPS trans-mission and the measured leveling are compared.The results show that the standard deviation of the GPS transmit height on the distance of about 2 to 4 km is 0.0123 m.The GPS transmit height meth-od using EGM2008 gravity field model can meet the need of the tunnel height through error.