Abstract:

The design tensile and prestressing force calculation method of anti-slides pile with prestressed cables are summarized and improved, which makes the methods consider displacement coordination of pestressed cable and pile. According to each case of prestressed cable acting on pile top and pile body, the semi-analytic and semi-numerical weighted residual method is applied to stress calculation of anti-slides pile with prestressed cables; and the extensively adapted B-spline function is used as trial function; then the calculation program is worked out; and the program can consider soil resistance above sliding surface in front of pile. The program is applied to analyze existing example; and its result is compared with the result obtained by finite difference method; the reliability of the method is proved. Simultaneously, the proposed method is applied to another two calculation examples; aiming at different calculation methods of anchor design tensible and prestressing force, the comparative analysis table with relevant design tensible force, prestressing force, maximum bending moment of pile body and pile top displacement is presented respectively; pile force diagram is given; and the calculation also shows that it is not every method suitable for specific calculation example; and it must take concrete analysis of concrete issue.

Key words: anti-slide pile, prestressed anchor, displacement compatibility, weighted residual method, stress analysis