大口径钻喷一体化高喷灌浆技术及应用

Integration of Large Diameter Drilling and High Pressure Jet Grouting: A Case of Application

对江西省廖坊水利枢纽库区防护工程八堡堤和万年堤防渗施工进行渗漏处理,首次采用了加大钻头直径的高压旋喷灌浆技术,并创新性地使用了钻喷一体化施工方法。选取具有较强代表性的工程部位进行高压喷射灌浆现场试验,对试验效果进行检测和对数据进行分析,取得了适合本工程的高喷灌浆施工技术参数,保证了高喷防渗墙的质量。通过现场试验和工程蓄水运行情况的检验,该施工工艺在砂卵石率高的地层成墙效果好,高压旋喷灌浆防渗墙的质量可靠;工程施工后取得了良好的蓄水效果。成果为高压喷射灌浆技术在其它防渗工程中的应用提供了参考经验。

High pressure rotary jet grouting and large diameter drilling are integrated to treat the seepage of levees at Liaofang hydropower station in Jiangxi Province. Typical segments are selected for the jet grouting test. The grou- ting result is inspected and analysed to obtain technical parameters of the jet grouting. Through in-site test and wa- ter storage operation, this technique is verified to have good effect and sound quality in sandy gravel stratum. It could be a reference for the application of high pressure jet grouting in other seepage prevention projects.