Experimental Study on Dynamic Parameters of the Silty Clay Surrounding a Metro Tunnel

›› 2019, Vol. 33 ›› Issue (3): 384-388.

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Experimental Study on Dynamic Parameters of the Silty Clay Surrounding a Metro Tunnel

ZHAO Zhonghua1, LEI Yong2， LU Fatan3

(1.Department of Civil Engineering, Shenyang Urban Construction University, Shenyang 110167;
2.Liaoning Division, China National Geological Exploration Center of Building Materials Industry, Shenyang 110004；
3.Shen Kan Engineering & Technology Co. MCC, Shenyang 110016)

Received:2019-01-24 Revised:2019-02-14 Online:2019-06-20 Published:2019-08-16

Abstract

Abstract: The dynamic parameters (dynamic shear modulus and damping ratio) of a silty clay surrounding the metro tunnel were studied by using the GDS resonant column test and the dynamic shear modulus and damping ratio of the silty clay samples were analyzed under different confining pressures. The results show that, with the increase of dynamic shear strain, the dynamic shear modulus decreases and the damping ratio increases; with the increase of confining pressure, the dynamic shear modulus increases and the damping ratio decreases and the effect of confining pressures on the dynamic shear modulus is more significant than that of the damping ratio; the liquid index has smaller effect, the effect of the confining pressure on the damping ratio is more obvious; the relationships between the maximum dynamic shear modulus and the confining pressure, the reference shear strain and the confining pressure, the maximum damping ratio and confining pressure has a good linear relationship.

Key words: Silty Clay, Dynamic Shear Modulus, Damping Ratio

ZHAO Zhonghua1, LEI Yong2， LU Fatan3 . Experimental Study on Dynamic Parameters of the Silty Clay Surrounding a Metro Tunnel[J]. , 2019, 33(3): 384-388.

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Experimental Study on Dynamic Parameters of the Silty Clay Surrounding a Metro Tunnel

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