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( 1 ) Master the basic data of the proposed reinforcement project, such as project scale, depth, quality requirements; lithology such as rock fissures, caves, and permeability coefficients; groundwater flow rate, flow direction, flow rate, chemical composition and erosion.
( 2 ) Determine the reinforcement scheme, according to the scale, depth, geological and hydrogeological conditions of the proposed reinforcement project, combined with the possible selection of grouting materials and performance of construction equipment, considering the length of construction, project quality, engineering difficulty and cost. After the comparison, determine the reinforcement scheme.
( 3 ) Calculate the grouting parameters according to the selected grouting scheme. The grouting parameters mainly include the grouting pressure, the effective diffusion radius of the slurry, the spacing of the grouting holes and the consumption of the slurry.
Due to the complex geological conditions and a wide variety of grouting materials, the calculation of grouting parameters also requires different formulas.
The design steps for the reinforcement project are: