The layerwise summation method is widely used for predicting settlement of soft ground in highway construction practice. However

the results of predicted settlement often show bad match with the real monitoring settlement due to the low reliability of soil profiling and compression modulus predicting

solely based on the boring tests and laboratory tests. Therefore

the piezocone testing (CPTU) is especially useful for soil investigation of soft soils and settlement prediction

which can provide three continuous profiles of measurements

including tip resistance

sleeve friction and pore water pressure. A specific study in Lianyan Expressway was conducted. Firstly

the optimal segmentation method

one of multivariate statistical analysis methods

was used for the soil profiling using the tip resistance measurements. Then

by inversion analysis of monitoring settlement data

the compression modulus was evaluated using the measurements of CPTU. Lastly

the comparison between the predicting and the monitoring settlements shows that the presented method is reliable for settlement prediction of soft ground.