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郑州引黄灌溉龙湖调蓄工程出口4~#控制闸采用拱形闸门,横向布置为3孔闸室,闸室每孔净宽24 m,闸底板全宽100 m,闸室长30 m。闸基位于第(4)层细砂上,存在闸基渗透稳定问题和地震液化问题及不均匀沉降问题,处理方式采用地下连续墙封围+水泥土搅拌桩处理法,处理后的复合地基消除了地震液化,其承载力特征值、最大沉降量及相临区沉降差均满足设计要求;复合地基渗透系数<1.00×10~(-5)cm/s,具微透水性。证明该出口控制闸地基处理是合理可行的;其经验可以供同类工程参考。
The control gates of 4 ~ # at Longhu Regulating Project of Irrigation in Yellow River in Zhengzhou Diversion Project adopt arched gate and horizontally arranged as 3-hole sluice chamber. Each hole of sluice chamber has a net width of 24 m and full gate width of 100 m and gate length of 30 m. The sluice foundation is located on the fine sand layer (4), which has the problem of stability of sluice base, liquefaction problem and uneven settlement of the sluice foundation. The treatment method adopts the method of underground continuous wall enclosure + cement-soil mixing pile treatment, and the treated composite foundation eliminates The earthquake liquefaction, the bearing capacity characteristic value, the maximum settlement and the settlement of the adjacent area all meet the design requirements. The permeability coefficient of the composite foundation is less than 1.00 × 10 -5 cm / s. Proving that the exit control gate foundation treatment is reasonable and feasible; its experience can be used for reference for similar projects.