With the continuous construction of large-scale geotechnical engineering, more and attention has been paid to long-term stability rock mass especially problem creep under influence water. Combined with author’s previous research on triaxial characteristics sandstone water-rock interaction, a nonlinear constitutive model was established capture degradation behavior due cyclic wetting drying rese...

Comprehensive field investigations into the axial cyclic loading behaviour of open-steel pipe piles driven and aged in low-to-medium density chalk identify conditions under which is stable, unstable or metastable. Post-cycling monotonic tests confirmed that stable cycling enhanced pile capacity marginally, while cases suffered potentially large losses shaft capacity. Metastable led to intermedi...

The projected shell model analysis is carried out using the triaxial Nilsson+BCS basis. It is demonstrated that, for an accurate description of the moments of inertia in the transitional region, it is necessary to take the triaxiality into account and perform the three-dimensional angular-momentum projection from the triaxial Nilsson+BCS intrinsic wavefunction. PACS numbers : 21.60.Cs, 21.10.Hw...

Wellbore stability analysis based on a new true-triaxial failure criterion i Abstract A main aspect of wellbore stability analysis is the selection of an appropriate rock failure criterion. The most commonly used criterion for brittle failure of rocks is the Mohr-Coulomb criterion. This criterion involves only the maximum and minimum principal stresses, σ 1 and σ 3 , and therefore assumes that ...

Cyclic undrained triaxial tests are commonly used in research and practical design to evaluate the liquefaction resistance of sandy soils. This paper aims propose a methodology by considering variability or uncertainty associated with experimentation, using Bayesian statistics Markov chain Monte Carlo technique. In addition conventional nonhierarchical modeling, hierarchical modeling is adopted...

Abstract During shale gas exploration, natural fractures in reservoirs may be induced by cyclic loads frequently encountered different geological processes, including tectonic movements, seismic actions, and artificial construction interference (vertical horizontal wells drilling hydraulic fracturing). In this paper, experiments PFC 2D simulations are conducted to investigate the mechanical res...

We make the hypothesis that molecular cloud fragments are triaxial bodies with a large scale magnetic field oriented along the short axis. While consistent with theoretical expectations, this idea is supported by magnetic field strength data, which show strong evidence for flattening along the direction of the mean magnetic field. It is also consistent with early submillimeter polarization data...

The newly developed multi-quasiparticle triaxial projected shell-model approach is employed to study the high-spin band structures in neutron-deficient even-even Ceand Nd-isotopes. It is observed that γ-bands are built on each intrinsic configuration of the triaxial mean-field deformation. Due to the fact that a triaxial configuration is a superposition of several K-states, the projection from ...