复杂条件下地下承压水防渗施工技术研究

Research on Seepage Prevention Technology of Underground Confined Water Under Complex Conditions

根据承压水的形成原理,白俄罗斯维捷布斯克水电站采用大围堰套小围堰的方式解决深基坑白云岩破碎带地下承压水防渗问题,厂房部位二次防渗采用素混凝土桩、高压旋喷灌浆和帷幕灌浆联合的方法进行防渗处理,有效地解决了深基坑、大面积、地质条件复杂情况下,砂卵石、白云岩破碎带地下承压水防渗问题。

According to the formation principle of confined water,Vitebsk Hydropower Station in Belarus adopts the method of large cofferdam with small cofferdam to solve the seepage prevention problem of underground confined water in dolomite broken zone of deep foundation pit.The secondary anti-seepage treatment of plant parts is carried out by the combined method of plain concrete pile,high pressure rotary grouting and curtain grouting,which can effectively solve the anti-seepage problem of underground confined water in the broken zone of sand pebble and dolomite under the condition of deep foundation pit,large area and complex geological conditions.