The bearing capacity of the PHC tube pile soil mixing wall is analyzed.

The working mechanism of reinforced continuous cement-soil wall is described,and it is pointed out that the cement soil can share load and make contribution to the stiffness of continuous wall structure.

Taking a designed round reinforced sement soil working well as a basic model,and considering its macroscopically presented orthogonal anisotropy,the technique of orthogonal anisotropy 3D limited element analysis is used to research the distribution characteristics of soil back pressure caused by top thrust force.

Analysis on the economic indicator of stiffened cement soil mixing pile;

According to characteristic geological condition of Yangtze River Floodplain,composite retaining systems of soil nailing wall and cement-soil wall are used with the consideration of the experience,a simplified model for calculating is proposed along with calculation method and key construction of such composite retaining.

In soft soil area cement-soil wall has been used on deep foundation pit bracing,which not only has the advantage of good whole rigidity and less water leakage into the pit,but also saves time,is good for environment protection,and costs less money.