首页|Effective grouting area of jointed slope and stress deformation responses by numerical analysis with FLAC3D
Effective grouting area of jointed slope and stress deformation responses by numerical analysis with FLAC3D
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To study the grouting reinforcement mechanism in jointed rock slope, first, the theoretical deduction was done to calculate the critical length of slipping if the slope angle is larger than that of joint inclination; Second, the numerical calculation model was founded by FLAC3D, so as to find the stress and deformation responses of rock mass in the state before and after grouting, the analysis results show that the range between the boundary of critical slipping block and the joint plane that passes the slope toe is the effec-tive grouting area (EGA). After excavation, large deformation occurs along the joint plane. After grouting, the displacements of rock particles become uniform and continuous, and large deformations along the joint plane are controlled; the dynamic displacement can re-flect the deformation response of slope during excavation in the state before and after grouting, as well as the shear location of potential slip plane. After grouting, the dynamic displacement of each monitoring point reaches the peak value with very few time steps, which indicate that the parameters of the joint plane, such as strength and stiffness, are improved; the stress field becomes uniform. Tensile area reduces gradually; whole stability of the slope and its ability to resist tensile and shear stress are improved greatly.
slopestressdeformationcrannyFLAC3D
ZHU Zi-qiang、LIU Qun-yi、ZENG Fan-he、QING Du-gan
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School of Info-Physics Engineering, Central South University, Changsha 410083, China
Highway Management Department of Hunan, Changsha 410007, China
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NSTL
万方数据
