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利用广州南沙某大型地基处理工程勘察资料及单桥静力触探、十字板剪切等测试数据进行分析研究,建立了适用于淤泥地基的单桥静力触探与十字板剪切参数间的经验关系并给出适用条件,其中比贯入阻力Ps和剪切强度Cu间呈线性关系,Ps与灵敏度系数St呈幂函数关系,后一关系适用于不排水抗剪强度区间为0~20k Pa,以及比贯入阻力区间为50~360k Pa的淤泥土层。此外,本文还导出了淤泥地基Ps-St半理论公式并与实测数据、经验关系进行了比较,结果表明其具有较好的适用性。本文工作对淤泥地基的常用原位实测力学参数及相互关系具有一定参考价值及借鉴性。
Based on the survey data of a large foundation treatment project in Guangzhou Nansha and the test data of single-bridge static penetration test and cross-cut shear test, a single-bridge static cone penetration test and a cross-shear test for silty foundation are established Empirical relationship and gives the applicable conditions, of which than penetration resistance Ps and shear strength Cu linear relationship between the Ps and sensitivity coefficient St power function relationship, the latter relationship for undrained shear strength range 0 ~ 20k Pa , And silt layers that are 50 to 360 kPa in penetration resistance. In addition, this paper also derived the Ps-St semi-theoretical formula of silty foundation and compared with the measured data and empirical results, the results show that it has good applicability. The work in this paper has certain reference value and reference to the commonly used in situ measured mechanical parameters and their relationship.