*3.2. Comparison with the Experimental Data in Undrained Heating Test of Abuel-Naga et al. (2007)*

Using modified oedometer and triaxial test apparatus, Abuel-Naga et al. [10] carried out undrained heating tests on soft Bangkok clay to study the thermal pore water pressures under different stress conditions. To obtain soils with different overconsolidation ratios, the consolidation pressure of 200 kPa was unloaded to 100 kPa and 50 kPa. The physical parameters of soft Bangkok clay are shown in Table 2. Meanwhile, although *Λ* was not reported in this undrained heat test, Ghaaowd et al. [9] found that when *Λ* = 10, their model-predicted results and the experimental results of Abuel-Naga et al. [10] fit best, so the value of *Λ* was taken as 10. Furthermore, since the maximum *OCR* is 4 and the critical threshold is not reached, the influence of stress history on *Λ* is ignored.

**Table 2.** Physical parameters of soft Bangkok clay obtained from Abuel-Naga et al. (2007).


The predicted results of Equation (12) are compared with the experimental results of Abuel-Naga et al. [10], and the comparison results are shown in Figure 2.

**Figure 2.** Comparison of predicted thermal pore water pressure against the results of Abuel-Naga et al. (2007).

From Figure 2, it can be observed that all experimental data points are around the predicting lines. In addition, through calculation, it was found that the coefficients of determination (*R*2) of all predicted results are 0.95 or above, which indicates that the predicted results are highly consistent with the experimental results. The consistency between the predicted results and the experimental results ensures the accuracy of the calculation method established in this paper.
