A Design Method for Ecological Airbag Support Dam

Abstract

The invention discloses a design method for an ecological airbag-supported dam, including step 1, establishing a mechanical model: one end of the airbag and the gate is anchored on the foundation of the upstream dam bottom through a main anchor bolt, wherein the anchor point forms the rotation point O of the gate, and the gate is Arc-shaped steel plate; with the rotation point O as the origin, the line where the foundation of the dam bottom is located is the x-axis, and the y-axis passes through the origin and along the water level elevation direction of the ecological airbag-supported dam to establish a mechanical model of the ecological airbag-supported dam; step 2, gate thickness design; Step 3, the parameter design of the main anchor bolts, and the design of each main anchor bolt to bear the load; Step 4, the effective buried depth of the auxiliary bolts in the limit zone is determined. The present invention provides a method for calculating and solving key parameters in an ecological airbag-supported dam, such as the determination of forces and moments such as the support force of the airbag on the gate, the gas pressure of the airbag, the maximum deflection of the section, the stress of the section, the thickness selection of the air shield dam face plate and the thickness of the stiffener The specific calculation formulas for type selection, number of anchor bolts and embedding depth are simple, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of movable gate and dam structures, in particular to a design method for an ecological airbag supporting dam. Background technique [0002] In recent years, with the country's increasing emphasis on environmental protection, small and medium-sized river management and urban ecological water system projects have developed rapidly, requiring that the overall layout of the project and the selection of equipment not only have the functions required by conventional water conservancy projects, but also It must also have multiple functions that are compatible with the ecological environment. Although the already-built flap dams, steel gate dams, rubber dams, etc. can meet or partially meet the above requirements, there are still deficiencies. For example, rubber dams are easily damaged by sharp objects, and the manufacturing and installation period is long. The opening and closing operations of steel gate dams are...

AI Technical Summary

Problems solved by technology

[0003] However, the basic research of ecological airbag dams is seriously lagging behind. In 2008, Yu Feng introduced the advantages of ecological airbag dams compared with traditional dams, and made a more comprehensive description of the structure, function and advantages of ecological airbag dams.

In 2013, Ji Zhenya and others initially established the mechanical model of the ecological airbag-supported dam, and gave the shape of the airbag of the ecological airbag-supported dam and the calculation formula of some forces in the system, but there are still some parameters (including the length of each part of the airbag, the anchoring force calculation method, the direction of the support force of the airbag on the shield plate, etc.) no proof or derivation was given

In general, there is currently no rigorous and clear mechanical model for the design of ecological airbag support dams in China, which urgently needs to be improved; there are no design specifications to follow, and the design unit has no reference basis, and the simplified method adopted leads to excessively high calculation security, resulting in The cost is greatly increased, and the design method needs to carry out in-depth and systematic research to provide technical support for promoting the promotion and application of this ecological dam type

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