Modification of Peck Formula to Predict Surface Settlement of Tunnel Construction in Water-Rich Sandy Cobble Strata and Its Program Implementation

There are few studies on the land subsidence induced by shield tunneling in water-rich sandy gravel stratum, which is of high research value. Linear regression and measured data were employed this study to investigate when crossing stratum from Mudan Dadao Station Longmen station Luoyang Metro Line 2. The maximum correction coefficient, ?, settlement trough width ?, introduced modify peck formula predict Luoyang’s stratum. It was discovered that original Peck needs be modified because its prediction result significantly larger than actual When value ranges ? ? 0.379~0.690 0.455~0.508, respectively, presented a minor error, terms curve, compared with formula, more reliable. best could obtained = 0.535 0.482. In addition, Python effectively improve calculation efficiency modification.