Application of High Pressure Jet Grouting Cutoff Wall in the Foundation of Cofferdam with Gravel and Pebble
Cofferdam is widely used in the construction of water conservancy projects.Which provides a solid guarantee for the construction of hydraulic structures on dry land.The anti-seepage performance of cofferdam is directly related to the safety of foundation pit and the construction quality of substructure.Curtain grouting+core wall(inclined wall),concrete cutoff wall or high pressure jet grouting are of-ten used for cofferdam seepage prevention.Combined with the seepage control construction practice of powerhouse cofferdam,the"three-pipe method"is used for the construction of high-pressure rotary jet grouting cutoff wall in the gravel foundation containing more drift pebbles.The construction technology and method are optimized from the aspects of field test,hole layout,drilling,jet grouting,and ex-ceptional case treatment.The application results show that the construction meet the design requirements after post-grouting quality in-spection.
gravel and pebblehigh pressure rotary jet groutingconstruction technicsquality inspection
国家科技期刊平台
NSTL
万方数据
维普
