3results about How to "The calculation process is clear" patented technology

The application discloses a kind of based on fissure expansion's rock slope excavation unloading failure path analysis method, belong to slope stability analysis technical field, including the following steps: S1, fissure equivalent simulation;S2, stress intensity factor calculation and expansion type judgment;S3, fissure cracking judgment;S4, fissure expansion calculation;S5, fissure expansion section generation.The fissure expansion's rock slope excavation unloading failure path analysis method in the application, by the originally complex fissure expansion environment is divided into multiple sub fissure dynamic expansion model, then single sub fissure expansion model is analyzed one by one, then the fissure expansion situation of single sub fissure expansion model is combined with other sub fissure expansion model and is analyzed, such as step by step calculation, obtain the fissure expansion situation of rock slope under overall complex environment, overall calculation logic is clear, avoid complex redundant calculation, improve fissure expansion situation analysis efficiency.

The application provides a tunnel composite stratum excavation induced frictional inclined pile bearing capacity loss calculation method, comprising obtaining tunnel parameters of a shield tunnel, structure parameters of an existing pile foundation and physical and mechanical parameters of a soil body; equivalent conversion of elastic modulus of a multilayer composite soil body into homogeneous single stratum elastic modulus, analysis of a soil body plastic zone and elastic zone range and boundary radius induced by tunnel excavation, establishment of a soil body arbitrary position radial stress and hoop stress distribution model; discrete treatment of an inclined pile along a pile length, discrimination of a stress region according to distances of pile body points to a tunnel center and calculation of corresponding soil body principal stresses, solving of pile soil contact surface normal stress changes through a pile shaft and stress principal direction angle conversion; calculation of pile body point side friction resistance changes according to normal stress changes, integral obtaining of total bearing capacity losses along the pile length and calculation of frictional pile foundation bearing capacity loss factors. The calculation method has high operability, simple calculation and wide application prospects.

The present disclosure provides a calculation method based on the maximum height of catalyst diffusion when the optimal number concentration of ice nuclei in the cloud, comprising establishing a diffusion calculation coordinate system; constructing a wind field model describing the distribution of horizontal wind speed and vertical airflow with height, deriving the lifting trajectory of the center line of the smoke plume with the downwind distance; establishing a concentration distribution analytical model describing the three-dimensional space of the catalyst in the coordinate system; simplifying the concentration distribution analytical model, and solving to obtain the predicted height based on the concentration dilution criterion; based on the vertical airflow velocity distribution model in the wind field model and the preset vertical airflow decay threshold, the critical height based on the limit of dynamic lifting ability is solved; taking the minimum value of the predicted height and the critical height as the maximum height of the catalyst diffusion, the method can comprehensively consider the vertical airflow lifting effect, and the calculation is simple and fast, solving the problems of large prediction deviation caused by ignoring the vertical airflow in the existing model and poor practicability caused by complex calculation.