Method for determining curtain grouting length and excavable length of water-inrush hidden danger tunnel
The present invention discloses a method for determining the curtain grouting length and the excavable length of a water-inrush hidden danger tunnel. The method comprises: establishing a basic model of burst of the water-inrush disaster, and determining a calculation formula for correcting the longi...
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| Format | Patent |
| Language | Chinese English |
| Published |
24.08.2018
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| Subjects | |
| Online Access | Get full text |
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| Summary: | The present invention discloses a method for determining the curtain grouting length and the excavable length of a water-inrush hidden danger tunnel. The method comprises: establishing a basic model of burst of the water-inrush disaster, and determining a calculation formula for correcting the longitudinal reference length L; before grouting, through surveys and experiments, obtaining data of thewater pressure, the surrounding rock strength and the distance from the tunnel face of the curtain grouting section and the front section, and determining the curtain grouting planned length, the planned excavation length, and the planned reserved length in the circulation; and after grouting, through surveys and experiments, obtaining data of the water pressure, the surrounding rock strength andthe distance from the tunnel face of the curtain grouting section and the front section, checking the treatment quality of the curtain grouting section, and finally determining the excavable length and the reserved length of t |
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| Bibliography: | Application Number: CN20181237571 |