The methods of high pressure swing guniting and three pipes juxtaposition are adopted for the impervious grouting in silty sand and pebble layer in Xinping dike of Guigang hydroproject reservoir area.

• 采用高压摆喷方法及三列管法高喷设备对贵港航运枢纽库区新平堤堤基含泥砂卵石层进行防渗灌浆施工。