The Optimization Design Of T-shaped Underground Diaphragm Wall

T-shaped diaphragm wall is a supporting structure consisting of wall panel and rib, whichascendant in deep excavation engineering fields. With the pace of urbanization in China,excavation engineering will meet a growing number of technical problems and difficulties, theplane size of foundation pit is increasing, andso as to the depth of it, the surroundingenvironment and geological conditions will be complexincreasingly. T-shaped diaphragm wallhas the advantages of having higher stiffness, higher strength, better anti-seepage performance,better structural integrity, and less impact on the surrounding environment in the constructingprocess, etc..It has better application prospectsfor the excavation of "deeper, bigger, tighter,nearer". Scholars have done a lot of research tothe normal underground continuous wallstructuresand special-shaped underground continuous wall structures, but the research resultsmostly focused on improving the construction technology, lacking of targeted simplifiedtheory which can be directly applied to engineering design. The existing literature is alsolacking of discussion of its optimal planar dimensions, which greatly limits the developmentand application of this kind of supporting structure. This paper has been made in foundationof domestic and foreign research results, to study the factor of itsplane size which can affectthe work performance of T-shaped diaphragm wall, mainly to do the work of the followingaspects:1.Summarizing the current research and application results of T-shaped diaphragm walland proposing the issues remained to be resolved in this field.2.Summarizing the basic theory of finite element the papers involved, and using finiteelement analysis software MIDAS-GTS NX to establish the T-shaped diaphragmthree-dimensional slice model and integral three-dimensional model to investigate theinfluence of plane size factors to the work performance of T-shaped diaphragm wall:,,3. Proposingthe optimalsection of T-shaped diaphragm wall, using MIDAS-GTS NX toanalyze the impact of the work performance with an without the additional cover on the top ofthe wall.