The main building grade of Houcao Sluice is classified as level 1.The flood standard is designed once in 100 years and checked against a return period of 200 years,corresponding to a flow rate of 634 m3/s.The elevation of the bottom plate of the gate is 63.80m.The foundation of the gate is mainly located in sandy loam with medium permeability.The primary challenges in the gate chamber section are related to gate base(winding)leakage,seepage stability,and overall base stability.In view of the main engineering geological problems existing in the sluice chamber section,high spray mixing anti-seepage wall and CFG pile are used to treat the lock chamber section foundation in the design and construction.After undergoing treatment,the test results indicate that the cut-off wall and composite foundation meet the design requirements,thereby confirming the reasonability and feasibility of the foundation treatment scheme for Houcao Sluice Chamber Section.
sluice base leakageseepage stabilityhigh-jet mixing impervious wall
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