Finite Element Analysis of Natural Thawing Heat Transfer of Artificial Frozen Soil in Shield-Driven Tunnelling

Figure 6

0° isotherm plots at section of Y = 0 with different natural thawing times of (a) 0 days, (b) 10 days, (c) 20 days, (d) 30 days, (e) 40 days, (f) 50 days, (g) 54 days, (h) 58 days, and (i) 62 days.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)