Effects of Pipe Roof Support and Grouting Pre-Reinforcement on the Track Settlement

Table 2

Cross section parameters of the grouting steel pipe.

Number	R (mm)	s (mm)	Sg (m^2)	Sc (m^2)	I1 (m^4)	I2 (m^4)	E (GPa)	ρ (kg/m^3)	Sketch
1	89	5	2.35e^−2	2.72e^−3	6.36e^−7	1.49e^−8	27.29	2371.25
2	108	6	3.46e^−2	3.96e^−3	1.36e^−6	7.04e^−8	32.17	2369.44
3	127	8	4.75e^−2	6.18e^−3	2.90e^−6	2.49e^−7	37.69	2390.86
4	159	8	7.54e^−2	7.79e^−3	5.85e^−6	1.59e^−6	62.92	2354.17
5	178	9	9.45e^−2	9.81e^−3	9.24e^−6	3.92e^−6	78.68	2354.90
6	186	10	1.03e^−1	1.14e^−2	1.17e^−5	5.49e^−6	82.90	2364.24