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渗透破坏是堤防工程中较为常见的险情之一。通过分析北流市城区防洪堤堤基地质情况,对防洪堤进行渗流稳定计算,发现堤防填土和地基土的临界坡降大于允许的水力坡降,需采取防渗措施。提出了采用多头小直径深搅水泥土防渗墙、高压摆喷成墙、堤背加黏土盖重进行堤基防渗的设计方案。通过对3种防渗方案进行比较,找出经济、合理的工程措施,最终北流防洪堤采用了深搅水泥土防渗墙防渗为推荐设计方案。
Infiltration and destruction are one of the more common dangerous conditions in embankment projects. By analyzing the geological conditions of embankment embankment in Beiliu City, the seepage stability calculation of the embankment is carried out. It is found that the critical slope of embankment fill and foundation soil is larger than the allowable hydraulic gradient, and the seepage control measures should be taken. The design scheme of embankment seepage prevention with multi-head small diameter deep-cementing seepage prevention wall, high pressure swinging spray wall and dyke back with clay cover weight was put forward. By comparing the three kinds of anti-seepage programs, to find out the economic and reasonable engineering measures, and finally the Beiliu flood control embankment adopts the deep seepage-proofed soil seepage prevention wall anti-seepage as the recommended design.