High Pressure Injection Method Foundation Reinforcement Treatment

High-pressure jet grouting technology imported from Japan to China since the1970s, which has been30years tuil now. At that time, the technology is mainly used for the reinforcement of soft ground. It has been used for the dam seepage since1980s. Soft soil is widespread existence in our country, dealing with weak soils and special soil become the most important issue of the construction work. Jet grouting method changed some characteristics of the foundation soil so that the foundation soil can reach design capacity, which meets the requirements of the safe use of the building. Currently, the technology which has been promoted in the country is used for The Three Gorges, The Dongfeng Power Plants and other large-scale water conservancy. It has a lot of features, such as safety, widely applying to soil quality, smally construction noise, highly shaft strength, controlled concretion body shape, vastly source material, and lowly price. It is widely used in foundation reinforcement of the building, deep excavation support and Watertight, slope stability, dams impermeable shield tunnel along the reinforcement and the possible collapse site of mountain, the tunnel reinforcement.The mainly research in this field at home and abroad is application, including material formulation, construction equipment and construction technology. High Pressure Injection Method as a modern soil reinforcement method has a lot of advantage. Forexample, it can check water seepage control effect, enhance the foundation strength and the bearing capacity of the foundation, reduce retaining structure earth pressure, prevent sand liquefaction and reduce soil’s moisture content. The soil after strengthening has high quality and good reliability.This paper has a wide distribution in selection of soft soil foundation as the research object. And The high pressure jet grouting method as a treatment method for the research. We make the soft ground or the special soil foundation to understand the building’s load by injecting grout to the land for building, and to achieve the safety of the building’s use. It is playing an important role in construction.