Shield tunnel deformation grouting reinforcement correction method suitable for water-rich sand layer
The invention provides a shield tunnel deformation grouting reinforcement deviation rectifying method suitable for a water-rich sand layer, which comprises the following steps of: drilling a grouting hole in a stratum needing to be grouted through a drilling device, fixing a one-way valve and mounti...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention provides a shield tunnel deformation grouting reinforcement deviation rectifying method suitable for a water-rich sand layer, which comprises the following steps of: drilling a grouting hole in a stratum needing to be grouted through a drilling device, fixing a one-way valve and mounting a sleeve valve pipe, and then reinforcing a soil body through high-low pressure pulse long-distance jet grouting, and then double-liquid normal-pressure grouting is conducted through the duct piece secondary grouting hole, and finally the grouting pipe is lowered downwards to be connected with the high-pressure grouting liquid to conduct double-liquid secondary grouting till grouting is finished. The grouting pressure is adjusted in the grouting process, the slurry diffusion radius is enlarged, and the slurry diffusion range is widened; the strength of a grouting reinforcement body in the preset time can be improved by adopting multiple grouting procedures and combining with a reversing valve to adjust a grout p |
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