该技术在控制断面超欠挖，提高光面爆破水平效果明显。
The technology can be used to keep cross-section excavation in control and improve explosion level.
通过数据采集，进行坐标转换，能够方便地计算出测点超欠挖。
Through data collection and coordinate transformation, the over-under-excavated values can be obtained easily.
在超欠挖严重的情况下，对隧道的稳定性，尤其是软岩隧道会产生一定的影响。
Tunnel stability, especially in soft rock tunnel, will be affected to certain degree for the enormous over-break or under-break of excavation.
以弹性地基梁理论为基础，建立了上排钢管幕在超挖和欠挖两种工况下的力学计算模型，推导出钢管幕的挠度曲线及相应的控制方程。
Underexcavation and overexcavation models have been presented based on the elastic foundation beam theory and the corresponding deflection equations and other controlling equations have been deduced.
以弹性地基梁理论为基础，建立了上排钢管幕在超挖和欠挖两种工况下的力学计算模型，推导出钢管幕的挠度曲线及相应的控制方程。
Underexcavation and overexcavation models have been presented based on the elastic foundation beam theory and the corresponding deflection equations and other controlling equations have been deduced.
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