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中小型工程的土石围堰浅层防渗通过粘土心墙、混凝土防渗墙的处理可满足防渗要求,但原河床砂砾石层埋深较深,需要进行深层防渗时,粘土心墙或混凝土防渗墙等防渗措施受地下水、机械能力限制等原因实施困难,采用高压喷射灌浆防渗又受到工程量小、造价高、专业队伍少不易组织等条件限制。本文就土石围堰深层防渗的施工组织特点,以水泊峡电站枢纽围堰防渗施工为实例,探讨采用常规灌浆工艺进行围堰水泥土灌浆防渗处理的方法,供同类工程围堰防渗施工时参考和借鉴。
For medium and small-sized projects, the shallow seepage prevention of earth-rock cofferdam can meet the requirements of seepage prevention through the treatment of clay core wall and concrete cutoff wall. However, when the original sand-gravel layer is deep and deep seepage prevention is needed, the clay core wall or Impermeability measures such as concrete cutoff walls are difficult to implement due to groundwater and mechanical capacity limitations. The use of high-pressure jet grouting seepage prevention is subject to conditions such as small construction cost, high cost, and less specialized organization. In this paper, the earth-rock cofferdam deep seepage control of the construction organization and characteristics of Shuibuxia hydropower station cofferdam seepage control construction as an example to explore the use of conventional grouting Cofferdam cement grouting seepage control methods for similar projects cofferdam Permeation construction reference and reference.