Abstract The excavation of the Humaling tunnel in water-rich fine sand was very unstable and inclined to collapse, resulting in water inflow, gushings, significant settlement, and primary support deformation. Conventional grouting usually consumes large amounts of grout and is relatively inefficient, while using chemical grout is expensive. Based on much practice, this study found that two-component backward split grouting effectively improved the ground stability and controlled the deformation of surrounding rock as well as influenced construction costs.
Abstract：
The excavation of the Humaling tunnel in water-rich fine sand was very unstable and inclined to collapse, resulting in water inflow, gushings, significant settlement, and primary support deformation. Conventional grouting usually consumes large amounts of grout and is relatively inefficient, while using chemical grout is expensive. Based on much practice, this study found that two-component backward split grouting effectively improved the ground stability and controlled the deformation of surrounding rock as well as influenced construction costs.
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Cite this article:
.Application of Two-Component Backward Split Grouting to the Humaling Tunnel in Water-Rich Fine Sand[J] MODERN TUNNELLING TECHNOLOGY, 2012,V49(4): 165-169
2012, Vol. 49 