旁压试验在天津地区确定地基土承载力的修正研究  

Research on Revision of Foundation Bearing Capacity by Pressuremeter Test in Tianjin Region

作　　者：刘浩 张建根 LIU Hao;ZHANG Jiangen

机构地区：[1]天津市政工程设计研究总院有限公司,天津市300051

出　　处：《城市道桥与防洪》2023年第2期202-205,共4页Urban Roads Bridges & Flood Control

摘　　要：地基土中旁压试验机理近似于载荷试验,反映出了土体弹塑性体的受力变化特性,通过旁压试验临塑压力pf、极限压力pL两种方式可快速方便地确定承载力特征值。确定承载力特征值过程中选用合理的修正系数λ与安全系数K值,能够保证旁压试验结果应用的准确性及适用性。现通过与土工试验、静力触探试验指标查表法确定的承载力数值对比分析,适当调整修正系数λ与安全系数K,得到了较为客观可靠的旁压试验承载力特征值。The mechanism of pressuremeter test in the foundation soil is similar to that of load test, which reflects the stress variation characteristics of soil elastoplastic body. The characteristic value of bearing capacity can be quickly and conveniently determined by two ways of plastic pressure pf and limit pressure p L of the pressuremeter test. The reasonable revision factor λ and safety factor K are selected in the process of determining the characteristic value of bearing capacity, which can guarantee the accuracy and applicability of the result application of the pressuremeter test. Through the comparison and analysis of the numerical values of bearing capacity determined by the index lookup method of geotechnical test and static penetration test, the revision factor λ and safety factor K are appropriately adjusted to obtain the more objective and reliable characteristic values of bearing capacity of pressuremeter test.

关 键 词：地基承载力 旁压试验 物理性指标 静力触探指标 

分 类 号：TU411.3[建筑科学—岩土工程]