Abstract: This paper presents a new method of liquefaction determination method based on the tip resistance of Cone Penetration Test (CPT) approach in the Shanghai Municipal Code. The linear regression analyses were performed between the clayey content, ρ_cand the tip resistance, p_s, from a large amount of CPT test data from the coastal area of Dafeng area, Jiangsu Providence. So that the tip resistance reference value corresponding to the seismic intensity is established, and then the method for determining the liquefaction of CPT in the coastal Dafeng area is obtained. By comparing and verifying the crimination results with the SPT method, the applicability of this method in the coastal Dafeng area is explained, and it provides scientific and effective liquefaction prediction for future major projects in this area, which has very important reference significance.

Key words: liquefaction determination, cone penetration test with tip resistance measurement, standard penetration tests, applicability range