Design method of passive flexible protective net system for rockfall prevention based on energy matching principle

Abstract

The invention discloses a rockfall prevention driven flexible protective net system designing method based on the energy matching principle. The rockfall prevention driven flexible protective net system designing method comprises the steps that 1, the energy consumption rate matching principle of components of a driven flexible protective net structure is established; 2, preliminary model selection and arrangement are performed on the components of the driven flexible protective net structure; 3, an explicit dynamics computation model capable of considering features such as the initial perpendicularity, large sliding of a supporting rope, large rotation of a supporting column and large deformation of an interception net is built through a finite element computing method; 4, impact loading is performed on the computation model, and dynamics response of the structure under the impact effect is analyzed; 5, structural design of the driven flexible protective net is performed. According to the method, the design principle of energy matching is adopted, both the force balance and the energy balance are considered, and the design is more scientific and reasonable; the component strength, stability, deformation and the like are used as design verification control indexes, and both the component design bearing capacity safety storage and the applicability of the protective net structural overall interception effect are considered.

Description

technical field [0001] The invention relates to a novel design method of a passive flexible protection net, belonging to the field of slope protection engineering. Background technique [0002] In recent years, rockfall on slopes has posed a serious threat to traffic safety and the safety of life and property, and flexible protective nets have played an important role in the prevention and control of rockfall. Flexible protection systems are mainly divided into active flexible protection systems and passive flexible protection systems. Among them, the passive protection system is composed of interception structure (wire rope net or ring net, a layer of wire grid is added when small falling rocks need to be intercepted), support structure (steel column), connection structure (including anchor rope, support rope), power consumption Energy device (decompression ring) and foundation are composed of five main parts. The combination of the steel column and the wire rope net form...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a design method for the passive and flexible protective net system for rockfall protection based on the principle of energy matching. Protection capability that meets its design requirements

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