Application of DDA to simulate characteristics of the Tsaoling landslide

Wu, Jian Hong; Chen, Chun Hwa

doi:10.1016/j.compgeo.2011.04.003

Cited by 144 publications

(45 citation statements)

References 15 publications

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“…Other large-scale catastrophic landslides associated with reservoir operations have been reported by Alcántara-Ayala & Domínguez-Morales (2008) (San Juan de Grijalva slide in Mexico, 2007); Wang et al (2004) and Dai et al (2004) (Qiangjianping slide in China, towards the reservoir of the Three Gorges Project, 2003); Chamot (1993), Plaza-Netos & Zevallos (1994), Schuster et al (2002) and Harden (2004) (La Josefina landslide, Ecuador, in 1993). An often reported case in recent years is the giant Tsaoling landslide, Taiwan, that was triggered by the 1999 Chi-Chi earthquake (Chen et al, 2003;Tang et al, 2009;Liao et al, 2011;Wu & Chen, 2011;Yang et al, 2014. ) In general, the interpretation of earthquake-induced motion requires velocity-and, in some cases, displacement-dependent shear strength weakening of the failure surface.…”

Section: Introductionmentioning

confidence: 99%

Thermo-poro-mechanical analysis of landslides: from creeping behaviour to catastrophic failure

2016

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The scope of the paper encompasses planar and compound sliding motions, which may exhibit creeping behaviour during a certain period but may evolve to a very rapid motion. Thermo-mechanical interactions, at the scale of the sliding surface, are accepted as a critical aspect to explain these motion phases and their relationship. The sliding kinetics and global equilibrium are described at a large scale and the evolving shearing strength at the sliding surface derives from the local analysis of the shearing band and its vicinity. Pore pressures, temperatures and related variables are calculated by resolving a set of balance equations. The paper describes the transition from creeping motions to a rapid event. Results are found in terms of dimensionless numbers. Calculation of the slide evolution requires special numerical techniques described in the paper. Band permeability is found to be the dominant property controlling the triggering of fast motions. The creeping stage and the eventual slide blow-up are intimately linked. This relationship is explored in the paper. The models presented can be readily used to back-analyse relevant case histories or, in principle, even to carry out predictive modelling, provided an adequate calibration is available for the material parameters.

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Section: Introductionmentioning

confidence: 99%

Thermo-poro-mechanical analysis of landslides: from creeping behaviour to catastrophic failure

2016

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“…[1,2], discontinuous deformation analysis (DDA) [3] is now recognized as an efficient tool for solving the various discontinuities in geotechnical problems. Because it is effective in simulating the dynamic mechanic behavior of block systems [4], DDA has been used to address diverse problems in various types of structures, such as the stability assessment of rock slopes [5]; the path tracking of rockfalls [6]; the blasting effect evaluation [7]; the simulation of landslides [8,9]; the construction of rock-fill dams [10], stacked block piles [11], and masonry structures [12]; and the analysis of coupled hydromechanical processes [13]. With the modification of the cohesion effect in sliding [14], DDA is expected to be used in the stability analysis of soil slopes.…”

Section: Introductionmentioning

confidence: 99%

An efficient remedy for the false volume expansion of DDA when simulating large rotation

Jiang

Zheng

2015

Computers and Geotechnics

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“…Azizabadi et al (2014) studied the maximum displacement at the crest of an open pit mine due to the influence of blasting with UDEC software. Wu and Chen (2011) studied an earthquake induced landslide using the DDA method in which the movement of blocks sliding down from a mountain was simulated.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Prediction of Rock Mass Deformations in Three Dimensions for a Part of an Open Pit Mine and Comparison with Field Deformation Monitoring Data

Kulatilake

Shu

2015

Geotech Geol Eng

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The intact rock properties and discontinuity properties for both DRC and DP rock formations that exist in the selected open pit mine were determined from tests conducted on rock samples collected from the mine site. Special survey equipment which has a total station, laser scanner and a camera was used to perform remote fracture mapping in the research area selected at the mine site. From remote fracture mapping data, the fracture orientation, spacing and density were calculated in a much refined way in this study compared to what exist in the literature. Discontinuity orientation distributions obtained through remote fracture mapping agreed very well with the results of manual fracture mapping conducted by the mining company. GSI rock quality system and Hoek-Brown failure criteria were used to estimate the rock mass properties combining the fracture mapping results with laboratory test results of intact rock samples. Fault properties and the DRC-DP contact properties were estimated based on the laboratory discontinuity test results. A geological model was built in a 3DEC model including all the major faults, DRC-DP contact, and two stages of rock excavation. The built major discontinuity system of 44 faults in 3DEC with their real orientations, locations and three dimensional extensions were validated successfully using the fault geometry data provided by the mining company using seven cross sections. Numerical modeling was conducted to study the effect of boundary conditions and lateral stress ratio on the stability of the considered rock slope. For the considered section of the rock slope, the displacements obtained through stress boundary conditions were seemed more realistic than that obtained through zero velocity boundary conditions (on all four lateral faces). Stable deformation distributions were obtained for k 0 in the range of 0.4-0.7. Because the studied rock mass is quite stable, it seems that an appropriate range for k 0 for this rock mass is between 0.4 and 0.7. The displacements occurred between July 2011 and July 2012 due to the nearby rock mass excavation that took place during the same period were compared between the field monitoring results available from the mining company and the predicted numerical modeling results; the best agreement was obtained for k 0 = 0.4. Therefore, k 0 = 0.4 can be decided as the most appropriate value for the studied mine site. In overall, the successful simulation of the rock excavation during a certain time period indicated the possibility of using the procedure developed in this study to investigate rock slope stability with respect to expected future rock excavations in mine planning.

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Application of DDA to simulate characteristics of the Tsaoling landslide

Cited by 144 publications

References 15 publications

Thermo-poro-mechanical analysis of landslides: from creeping behaviour to catastrophic failure

Thermo-poro-mechanical analysis of landslides: from creeping behaviour to catastrophic failure

An efficient remedy for the false volume expansion of DDA when simulating large rotation

Prediction of Rock Mass Deformations in Three Dimensions for a Part of an Open Pit Mine and Comparison with Field Deformation Monitoring Data

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