7results about How to "The calculation formula is simple" patented technology

The invention relates to the technical field of civil engineering, and particularly discloses a railway tunnel high-performance active support system design method considering a space-time effect, which comprises the following steps: S1, establishing a tunnel early-strength and high-strength sprayed concrete layer calculation model; s2, determining calculation parameters required by the sprayed layer calculation model according to the tunnel early-high-strength sprayed concrete layer calculation model; s3, influence factors of surrounding rock deformation pressure borne by the tunnel early-strength and high-strength sprayed concrete layer are determined; s4, establishing a surrounding rock deformation pressure calculation method of the tunnel early-strength and high-strength sprayed concrete layer considering the surrounding rock level; and S5, establishing a surrounding rock deformation pressure calculation method of the tunnel early-strength and high-strength sprayed concrete layer considering the rock mass quality index. By adopting the railway tunnel high-performance active support system design method considering the space-time effect, the safety of the tunnel early-strength and high-strength sprayed concrete layer under different time, geological conditions, construction levels and support design parameters can be simply, quickly and accurately calculated.

The application relates to a deep-sea shadow zone target distance and azimuth fast high-precision estimation method. First, a large-aperture horizontal array is divided into two sub-arrays with a certain horizontal interval, and target azimuth estimation is performed on array receiving signals of the two sub-arrays; second, based on target azimuth estimation results of the two sub-arrays and geometric relation with the target, the sound line propagation distance of the target is estimated, and the sound line propagation distance is converted into the horizontal distance between the target and the receiving array through a virtual source model; finally, the horizontal distance obtained is utilized to correct the horizontal array system direction-finding error in combination with geometric knowledge. Compared with a traditional two-station direction-finding cross positioning method, the positioning precision of the method is higher. The basic principle and implementation scheme of the method are verified through computer numerical simulation, and the result shows that in a typical deep-sea environment, the method can effectively estimate the distance and azimuth of a near-sea surface target.

The application provides a design method of a soil-rock combined foundation pit hanging foot pile supporting structure, the hanging foot pile supporting structure comprises a supporting pile and a reserved rock shoulder in a pit, and the design method comprises the following steps: a semi-infinite rock mass and an actual finite rock mass model are established by means of finite element software, a uniform load is applied to the rock mass model, the horizontal resistance coefficient of the rock mass is calculated and the reduction coefficient of the finite rock mass is obtained by comparison, and the reduction coefficient is substituted into a specification method to calculate the horizontal resistance coefficient of the finite rock mass in design; the supporting pile displacement, passive resistance safety factor, anti-overturning and anti-sliding checking are completed by using Lizheng deep foundation pit software, the suitable rock-embedded depth is determined, the pile reinforcement is determined according to the shear force and the bending moment calculated by the software; and the shear resistance and tensile resistance bearing capacity of the reserved rock shoulder in front of the pile are checked, and the rock shoulder width is determined. The passive resistance effect of the reserved rock shoulder in front of the pile is fully considered, the rock-embedded depth of the supporting pile can be effectively shortened, the supporting cost is saved, and certain economic benefits are obtained.

The application discloses a kind of elastic rigidity prediction methods of reed-bamboo-steel splint bolt connection node, and it is related to reed bolt connection technical field.The application is based on infinite body elastic foundation beam theory and is simplified, and an elastic rigidity calculation method suitable for reed-bamboo-steel splint bolt connection node is proposed, the method optimizes calculation parameters, so that it is simple in calculation process, so as to simply and quickly predict the elastic rigidity of reed-bamboo-steel splint connection form in the design process, increase the safety of this kind of connection design.The application can well solve the problem that the connection stiffness of steel splint connection form is difficult to calculate, and the connection stiffness can be calculated directly according to the structural design when reed-bamboo-steel splint bolt connection is adopted, which provides a reference for the design of this kind of connection.

This invention discloses a joint scheduling optimization system and method for energy storage and frequency regulation markets, considering the electrochemical-aging coupling characteristics of energy storage, and relates to the field of energy storage. The method simplifies the calculation formula for terminal voltage by ignoring the effect of capacitance in the equivalent circuit, and linearizes the relationship between the open-circuit voltage and state of charge, as well as the internal resistance characteristics of the energy storage system, thereby effectively reducing model complexity. Simultaneously, it utilizes sequential convex programming techniques to successively approximate the non-convex optimization problem, significantly improving solution efficiency and computational accuracy. This method not only accurately characterizes the dynamic behavior of energy storage systems under different scenarios but also provides a more operational optimization scheme for practical engineering applications. Furthermore, by linearizing the power constraints, the scalability and adaptability of the model are further enhanced, making it more suitable for the actual needs of multi-scenario joint scheduling.

The present invention provides a method for determining the rock blasting vibration safety factor based on the particle vibration velocity, and relates to the technical field of engineering blasting. The method first monitors the vibration velocity of the particle during on-site blasting to obtain the maximum vibration acceleration of the particle; and obtains the wave velocity of the rock mass and the static physical and mechanical parameters of the rock; then performs rock mass quality classification and estimates the static mechanical parameters of the rock mass; calculates the dynamic strain tensor of the rock mass, the dynamic strain rate of the rock mass and the dynamic uniaxial tensile strength of the rock mass; calculates the minimum dynamic principal stress of the rock mass based on the elastic constitutive model; and finally, according to the rock mass tensile strength theory, selects the maximum value of the minimum dynamic principal stress of the rock mass and the dynamic uniaxial tensile strength of the rock mass to calculate the blasting vibration safety factor. The method is based on the principle of mechanics and comprehensively considers the physical and mechanical parameters of the characteristic protection object. It can quantitatively describe the influence of blasting vibration on the specific protection object and determine the actual blasting vibration limit and safety factor of the specific protection object.

The invention relates to the technical field of geological exploration, and particularly discloses a rockburst identification method and system and a medium. According to the rockburst identification method provided on the basis of rock mass structural surface property ground stress characteristics and dynamic disturbance, the identification of the occurrence position and potential scale of strain type and structural surface type instant rockburst is realized by using mathematical space vector calculation from the nature of the strength of the rock mass and the stress state of the rock mass; according to the method, judgment is carried out through quantitative calculation, the accuracy is better, breakthrough of accurate position and potential scale calculation of rockburst in the tunnel cavern is achieved, meanwhile, the method is not limited by lithology and tunnel cavern types, accurate calculation can be achieved, calculation can be continuously carried out in the tunnel excavation process, limitation of monitoring equipment is avoided, and the method is suitable for popularization and application. The method is simple in calculation formula and wide in application range.