自平衡试验等效转换的附加压缩量修正  

Additional Compression Modification of Equivalent Conversion from Self-balanced Test

作　　者：马远刚[1,2] 陈开利[2] 杨春和[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071 [2]中铁大桥局集团武汉桥梁科学研究院有限公司,武汉430034

出　　处：《交通科技》2009年第5期13-16,共4页Transportation Science & Technology

摘　　要：提出一种新的自平衡试验数据简化等效转换方法,它考虑了自平衡加载方式下底层荷载箱以上桩体发生的压缩量及其转换后桩顶加载方式下的压缩量,对等效转换的桩顶位移进行附加压缩量修正,并给出了单层及双层荷载箱的计算公式;算例对比分析表明,这种方法比其他他简化转换方法确定的极限承载更准确,而且有更高的等效转换曲线相似性。A new simplified method of equivalent conversion from self-balanced test data to traditional load test data is put forward, which considers the compression of the pile section above bottom load box under the condition of self-balanced test and its compression under the condition of traditional load test after equivalent conversion. The top movement of equivalent conversion is modified by additional compression, and the computation formula for one cell and double cells is provided. Based on the computation examples, the ultimate bearing capacity determined by this method is more accurate than other methods and the equivalent conversion curve is more similar to the exact solution.

关 键 词：自平衡 等效转换 压缩量 极限承载力 相关系数 

分 类 号：TU473.16[建筑科学—结构工程] TU411.5[建筑科学—土工工程]