Research Of Application Of Cement Treated Gravity Retaining Wall

With the development of high-rise building and underground engineering, there are more and more deep excavation engineering and the various support system were developed. It not easy to choose the best type of foundation pit support system for any deep foundation pit. Cement treated gravity retaining wall is very suitable for the foundation pit that not too deep and proved to be economical by practice. In this paper, the development of the foundation pit engineering was introduced , the fundamental theory, design method and construction of foundation pit engineering were discussed. Then the development, design method and construction of cement treated column were analyzed. More over, the design and construction of cement treated gravity retaining wall, for example, the effect of depth of foundation pit, the ratio of retaining wall embedment(D)to depth of foundation pit(H), the width of retaining wall, the way that how the earth pressure and water pressure were considered on the design of cement treated gravity retaining wall were especially discussed.Analysis based on the physical and mechanical properties of soil in Tianjin city shown that cement treated gravity retaining wall is economical and suitable for the foundation pit when the depth of foundation pit is more than 6.0m. But when the depth of foundation pit is more than 6.0m, the width of cement treated gravity retaining wall need is nearly the same with the depth of foundation pit thus is not suitable and not economical, so some other type of support system should be adopted.Two actual engineering cases of cement treated gravity retaining wall were designed. Some conclusion and suggestion were made by calculation and comparison of these two actual engineering for the engineering with about the same condition. in foundation pit engineering. Finally, the Shengshi Garden foundation pit retaining engineering is completely calculated and designed.