Research On Grouting Uplift Technology In The Process Of Tunnel Undercrossing The Buildings

Grouting uplift is a technology used to filled and reinforced soft loose ground by grouting method,and then uplift buildings by grouting pressure.In this paper,based on previous studies,do the further study contents including the mechanism of grouting uplift,effect of different factors on grouting uplift,the general rules of grouting uplift,and apply the engineering methods of grouting uplift to buildings uplift practice of Xia Men Airport Road project at last. The details are as follows:(1) On the basis of researching domestic and foreign literature extensively,the mechanism of grouting uplift is learned and refined from previous research. the process of splitting grouting is analyzed. The destruction form of soil uplift and the value of Uplift pressure are made clear. The relationship between the grouting value and the soil displacement value is established.(2) Loratory experiment is used to determine the grouting material which is suit to the Airport Road strata,and field experiment is used to choose the better grouting technology between sleeve valve pipe Technology and drilling Technology.According to the Analyzed and summarized on grouting uplift experiment of the test buildings, the controlling standards of grouting pressure and Elevation of a single volume are Concluded. And the main points of the grouting uplift construction are summarized.(3) By using numerical simulation method,different ways of grouting uplift methods have been compared and analyzed.And some grouting effec have been got in the condition of different strata elastic modulus,different grouting pressure,different grouting depth,and a small amount of uplift for several times.(4) It shows that the effect of grouting uplift is remarkable after do some Comparison of settlement date,horauchi ground surface grouting uplift methods,and ground surface grouting uplift methods.But it also existences deficiency.The necessary conditions for a stable uplift has been summed up,and a further optimized about grouting uplift program has been done. All of that provide valuable experience for future similar projects.