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 