Study On The Numerical Simulation Of Deformation Mechanism Of Middle Frusta And Vertical Border Wall At TGP Permanent Shiplock

The surrounding rock mass of the TGP shiplocks is jointed rock mass cut by well-developed discontinuous joints. The middle frusta and vertical border wall are the important components of the lock room construction. Its deformability and stability will directly affect the construction function and using security. This text studies the fracture rising laws, the expanding direction, the expanding length, discontinuous jointed rock mass constitutive model and damage evolution equation. Application of the Cauchy'y law of continua, the motion equation of the tetrahedral element is concluded, and discretization the analysis zone, applying the finite difference method, all tetrahedral differential equations of motion are converted into the nodal finite difference equation. The text is detailed to study the deducing process of the nodal finite difference equation, and to study its application hi the rock mass engineering problems. In addition, the constitutive models included in FLAC-3D are deep into research, and the stress increments are corrected in terms of the plastic strain increment while occurrence of plasticity flow. On the process of simulation the deformation after excavation at the middle frusta and the vertical slope at Three Gorges permanent shiplock, program the Fortran procedure to perfect model creation and the capability of the pre-procedure and post-procedure in FLAC-3D. The FLAC-3D calculated values are made contrast analysis with the finite element calculated values and observed values, and mechanism of deformation at the deep part of rock mass and the interface slip is deep into research in Three Gorges permanent shiplock.