Through analyzed the testing results of several engineering examples,the mixing ratio adjustment and pipe pile foundation schemes are proposed.

Combining practical projects, the author provides measures and advice for problems happened in construction of pipe pile foundations in limestone geology areas.

Analyses of bearing capacity of pipe pile foundation in inhomogeneous and anisotropic soft ground;

A modified three-dimensional plastic limit analysis method is proposed for lateral bearing capacity of the large-diameter pipe pile in the inhomogeneous and anisotropic soft ground.

A discussion on some problems in the design and construction of PHC pipe pile foundation;

Some experience of tall building base type selection in lime rock region, the advantage and disadvantage of pre-stressed pipe pile base and massive cement-soil-mat foundation, design and adoption of ramming expand driven cast-in-place pile base are introduced in this paper.