Since the sprout has accumulated power for long time, its tail is buckling.

The cohesive strength and the friction angle in rock-soil triaxial rests;

Test research for influencing factors of the cohesive strength of sand soil tunnel surrounding rock;

its friction angle and cohesion, has been achieved.

The results of tests show that the distribution of cohesion of low liquid-limit clay decreases linearly form bottom to top and the distribution of the angle of internal friction is "S" form under freeze-thaw cycle.

Test results show cohesion increases with cement content and curing time increasing.

Testing study on influence of freezing and thawing circulation on saline soil’s cohesion;

Computation of lateral soil pressure on soil nailing wall considering cohesion force and cut slope angle;

Nonlinear visco-elasto-plastic rheological model of rock with consideration of cohesion and internal friction coefficient;

On the assumption that cohesive force of seabed soil isn’t associated with wave action,a criterion is proposed for discriminating wave-induced failure in seabed of feebly cohesive soil or silt;and it enriches traditional discriminant methods.

The paper analyses the influence of internal friction angle and cohesive force to arch effect of earth-rock dam by means of arch effect analysis and finite element software,with contact theory,the forefathers conclusion is verified.

The corresponding double-K fracture parameters (initial cracking roughness K_(IC)~(ini) and unstable fracture toughness K_(IC)~(ini)) introduced in the criterion are determined using a simple experiment method combing with an analytical evaluation based on the cohesive force on the fictitious crack zone.