Mutual interference and different excavation speeds during the construction of twin‐tube tunnel have intensified the complexity of groundwater seepage field damage, while the small‐interval tunnel has more complex evolution characteristics than traditional twin‐tube tunnel due to its small distance between the double holes, which poses greater challenges to the analysis and prediction of tunnel drainage design and seepage characteristics. Based on the study of groundwater seepage characteristics of single‐hole tunnel, this paper proposes a comprehensive method of theoretical deduction, physical testing, and computer technology to analyze the drainage and water pressure characteristics of small‐interval tunnels considering ecological hydrological environments and reduction effects. The research results indicate that small‐interval tunnels have a greater impact on the balance of the groundwater seepage field than single‐hole tunnels, and the permeability coefficient of the grouting ring has the most significant impact on water pressure. In addition, this paper also optimizes the standard‐based tunnel drainage design and constructed a multidimensional collaborative intelligent drainage adaptive platform for tunnel engineering. The relevant achievements have been well applied in tunnel engineering examples.
Chen et al. (Thu,) studied this question.
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