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.
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.
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.
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