Optical-Fiber-Based Smart Concrete Thermal Integrity Profiling: An Example of Concrete Shaft

Table 2

Location determination by different methods.

Situation	Actual location			Optical fiber method			Conventional method
	Depth		r	Depth		r	Depth		r
On tube	7.5 m	180	0.6096	7.58 m	179.7	0.6148	7.58 m	181	0.6148
Around tube	7.5 m	171	0.6096	7.575 m	169	0.6175	7.575 m	179.7	0.619
Between tubes	7.5 m	150	0.6096	7.576 m	149.1	0.6096	N/A	N/A	0.774