The Computational Method Of The Soil Pressure To The Brace Structure Of Deep Foundation-pit

By analyzing establishment, development and present situation of brace structure of deep foundation-pit in our country, it's main questions are point out. At the same time, the advantage and weakness is evaluated by contrasting computational method of brace system of deep foundation-pit, and it points out that the key questions of designing brace structure is distribution rule, dimension and effect factors of soil pressure. The paper proposes that the damage surface adopt curvilinear slip-surface, based on analyzing several normal models of soil pressure, and a new method of calculation soil pressure of brace structure of deep foundation-pit is derivated based on Prandtl theory under this assumption. Moreover contrasting against computational method of the classics soil pressure, better effect is acquired in the actual application.