Introduced hereby are exchange of the result from survey before construction, and the repetitive survey of the centerline and setting out of edge line, especially the layout of the pile fender and mile post, check up and addition of bench marks, survey of the longitudinal and cross sections, etc.

Application of cusp catastrophe theory in deep foundation pit support pile

And based upon stress measurement of foundation pit support piles and soil nailing the test results are analyzed.

Analytical model and calculation of wellhead protection pile structure for shallow offshore oil wells;