泥岩地基中钻孔灌注桩承载力特性动静载试验研究

依据西宁地区某工程3根大直径钻孔灌注桩的单桩竖向抗压静载试验和高应变动力测试结果,通过分析研究,表明在条件适合的情况下两种方法的检测结果基本上是相符合的,但由于两者的测试原理、分析方法等方面存在差异,使其检测结果又存在各自的不同特点。证明了在同一工程中采用动、静试验能够使检测结果相互印证,相互补充。结合两种方法的检n测结果,揭示了该地区泥岩地基中中长钻孔灌注桩的承载力特性、破坏模式等承载性状。对西北地区泥岩地基中钻孔灌注桩的设计、施工和深人研究具有指导意义,对西部大开发具有重大的现实意义。

REARCH ON THE SPECIAL NATURE OF BEARING CAPACITY OF BORE PERFU SION PILES IN MUD-ROCK BASE BY DYNAMIC AND STATIC TESTS

Base on the testing resulting of single pile vertical compressive static loading experiment and high strain dynamic test of three big-diameter bore perfusion pile in a project of Xi' ning area, The relatively consistent results have been obtained by means of analysis and research in some suitable conditions. But the results have respective characters because of different testing principle and analyzing methods. It proves that comparison between dynamic test and static test in the same project can be provable and complementary to each other. The two test results show the special nature of bearing capacity and destructive mechanism of medium-long diameter bore perfusion piles in mud-rock base, Which will offers constructive suggestion on design,construction and deeper research as well as great reality significance for Great West Development.