徐楼闸深厚粉细砂闸基防渗防冲方法及处理效果

鉴于徐楼闸老闸因闸基渗透、上下游冲刷而损坏，移址改建的徐楼闸新闸必须解决闸基深厚粉细砂层渗透能力强、不耐冲刷的问题，采用闸基换填水泥土、闸基设置截渗墙、下游消力池末端设置防冲墙等加固补强措施，就可有效减弱粉细砂的渗透问题，并可有效提高闸基的抗冲能力，从而确保闸基稳定安全运行。

Foundation Treatment Technology and Effect with Thick Silty Sand Overburden of Xulouzha

In view of the fact that the old gate of Xulouzha was damaged by the infiltration of the gate base and the erosion of the upper and lower reaches, the relocation of the new gate of Xulouzha must solve the problem that the deep fine sand layer of the gate base has strong permeability and is not resistant to erosion. Reinforcement measures, such as replacing cement and soil with sluice foundation, setting up interception wall on sluice base, and setting up anti-punching wall at the end of downstream stilling basin, can effectively weaken the permeability of fine sand and improve the impulse resistance of sluice base. Thus, it ensures the stable and safe operation of sluice base.