洪泽湖大堤渗漏探测与处理技术探析

Leakage detection and treatment technology for Hongze Lake Dyke

洪泽湖大堤是流域性重要堤防,存在着堤基有透水层、堤身不密实、堤后深塘底高程低、堤身内部存有历史决口遗址、埽工及乱石等问题,形成渗漏通道,危及大堤安全。管理部门采取地质钻探、同位素示踪法、浸润线观测SWS工程物探和DB-3Ⅰ型堤坝管涌渗漏检测等技术手段,对大堤进行渗漏检测。运用射水法混凝土截渗墙、振动沉模防渗墙、高压摆喷连续截渗墙以及压密注浆等加固技术对堤基和堤身进行截渗,取得了较好效果。

Hongze Lake Dyke is regarded as the maior embankment of the river basin. The dyke has been suf- fered from seepage passage caused by permeable layer, low density of embankment body, existed low pond and elevation, historical site of outbreak inside of embankment, fascine works and stone riprap. Technical approaches namely geological drilling, isotopic tracer method, saturation line observation engineering geophysical exploration, and dike piping leakage detection have been adopted for detection of leakage. Technologies of water jetting con- struction of concrete cutoff wall, vibratory sink mold wall, high pressure spray for the impervious wall and com- paction grouting have been employed for seepage prevention that has achieved great success.