4.2. Results from spatial analysis
3638 groups of samples are fitted by LM method in the analysis.
The root-mean-square error (RMSE) and correlation coefficient (R) are
used to validate the fitting results. Fig. 7 shows the histogram of R.
83% of the cases show good fitting results with R>0.8. The RMSE and
R of these cases are shown in Figs. 8 and 9. As a result, the proposed double
Gaussian model fit the settlement data well.
DK26+970 is a typical settlement array, as shown in Fig. 3. Actually,
due to the interference of the site conditions, only 5 settlementmarkers
were put into use in this ground array, so marker 6 was excluded. The
instrumentation data, however, could still be fully represented by the