新三管法高压灌浆—咬合桩组合帷幕施工技术

CONSTRUCTION TECHNOLOGY FORCOMPOSITE WATERPROOF CURTAIN OF HIGH-PRESSURE GROUTING-OCCLUSAL PILE WITH THE NEW THREE-PIPE METHOD

新三管法高喷止水帷幕是实践效果较好的止水帷幕工艺,应用广泛,但是对一些渗透系数极大的砂卵石地层,仍难以达到令人满意的止水效果。针对砂卵石地基的特点,结合本工程具体情况,采用新三管法高压灌浆—咬合桩组合止水帷幕进行止水,取得了良好的效果,可为类似渗透系数大的建筑基坑止水帷幕工程提供参考。

The high-pressure spiral jetting waterproof curtain using the new three-pipe method has good practical effects and is widely used,but which is still unsatisfactory in sandy cobble stratum with high permeability coefficient.Directing at the characteristics of sand cobble foundation and combined with the specific conditions of the project,composite waterproof curtain of high-pressure grouting-occlusal pile with the new three-pipe method runs well,providing references for waterproof curtain works of similar foundation pits constructions with high permeability coefficient.