Expandable loess tunnel anchoring and shotcreting support design method
By calculating the surrounding rock response curve and support characteristic curve and adjusting the design parameters in combination with the safety factor, the problem of unscientific anchor spraying support design in the existing technology is solved, which improves the tunnel stability and saves support costs.
CN119167465AInactive Publication Date: 2024-12-20NANHUA UNIV
Patent Information
- Application Number
- CN202410219969.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2024-12-20
- Estimated Expiration
- Not applicable · inactive patent
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Figure CN119167465A_ABST
Abstract
The invention discloses a design method of an expansive loess tunnel anchor-shotcrete support. The design method comprises the following steps: step 1, calculating and drawing a surrounding rock response curve under the action of different expansive forces; 2, inputting design parameters of the anchor-shotcrete supporting structure, and calculating and drawing a characteristic curve of the supporting structure; 3, the surrounding rock response curve and the support characteristic curve are combined, free face displacement during balance is determined, and the safety coefficient is calculated; 4, judging whether the section safety coefficient is acceptable or not; and 5, if not, continuously adjusting the support parameters until the calculated safety coefficient meets the requirement. The loess tunnel surrounding rock response curve considering the expansive force and the characteristic curve of the anchor-shotcrete supporting structure are obtained, the safety coefficient serves as a stability index, and the anchor-shotcrete supporting design method is provided, so that design parameters are more reliable and more reasonable, the tunnel stability can be improved, and the anchor-shotcrete supporting cost is saved.
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Citation Information
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