Research on the Reserved Deformations of Unsymmetrical Loading Loess Tunnels with Different Slopes
(1 School of Civil Engineering, Chongqing University, Chongqing 400045; 2 Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045; 3 Department of Geotechnical Engineering,Tongji University, Shanghai 200092)
Abstract：
Because of the unique physical and mechanical properties of loess and the unique asymmetrical force of
unsymmetrical loading tunnels, the reserved deformations of a shallow-buried unsymmetrical loading tunnel in loess are different from a common tunnel. Based on the Sunjiagou tunnel in Shanxi province, field monitoring data are collected and analyzed using regression analysis by the least square method and a numerical simulation verification is conducted using the finite- element software ANSYS. The law of surrounding rock deformation varying with the slope of a shallow-buried unsymmetrical loading tunnel in loess is summarized. The research shows that the recommended reserved deformations are 10~15 cm for the shallow side of a shallow-buried double-tube tunnel in loess with a slope of 15° ~45° and surrounding rock of grade V, and the recommended reserved deformations are 20~25cm, 25~30 cm and 28~33 cm, respectively, for the deep side under the slopes around 15°, 30°and 45 °.
JIN Mei-Hai- 1,
2 Li-Dong-Liang- 1,
2 Liu-Xin-Rong- 1 etc
.Research on the Reserved Deformations of Unsymmetrical Loading Loess Tunnels with Different Slopes[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(1): 130-137
2017, Vol. 54 