Analysis Study On Grouting Effect Test Method In Fully-heavily Weathered Granite Ground Of Sub-sea Tunnel

In this paper,on the experience of developing grouting effect for the cross harbour tunnel at home and abroad, combined with the xiamen xiang'an tunnel F4 weathered slot, we simulated the fully-heavily weathered in the laboratory and use the ultrasonic detected the test piece before and after the grouting. At the same time on work field we adopt the full-section curtain grouting technology to construct. And introduce the five kinds of detection grouting effect methods. We achieved the following results:(1)Through laboratory testing to simulated fully-heavilly granite strata grouting, we can accord to the size of the speed of the sound velocity to reflect the changes of the rock before and after grouting; at the same time ,we can use the ground-penetrating rader detected different porosity and different water content of materrials . When we get the samples, we can analysis and interpreatation of images to accumulated experience.(2)Combination of field test conditions , we use the ultrasound and ground-penetrating rader to detected the layer before and after the grouting. In conjunction with coring drilling, drilling water inflow comparision and on-site excavation , we can determine grouting effcet the F4 weathering slot. Through testing a comprehensive analysis of the advantages and disadvantages of various methods and proposed a testing method at the present stage of the deficiencies and further improve the detection of grouting effect of opinion.