Abstract: The pressuremeter tests (PMT) are performed on the Taipei silt, from which parameters, such as the initial lateral pressure (P0), yielding pressure (Py), limit pressure (PL), and deformation modulus (Em) are obtained. Based on the results, the undrained shear strength (Su) of the silt is evaluated using several empirical models, for example, the Gibson Anderson method, shear curve method and Menard's method. The evaluated undrained shear strength (Su) is compared with laboratory undrained shear test results. Statistical studies show that the soil parameters obtained from the pressuremeter tests and undrained shear strength tests are well correlated. Useful correlative formulas are obtained accordingly.