Analysis of Cusp Catastrophic Model for Vertical Stability of Drilling Shaft Lining

Table 1

Calculating parameter table of the drilling shaft lining.

Shaft type	Shaft material	Segment height (m)	Shaft thickness (mm)	Inner diameter (m)	Strength grade of concrete	Steel plate thickness		Elastic modulus (GPa)	Cross-sectional moment of inertia (m^4)	Self-weight per unit length of shaft (10^5 N/m)
						Inner	Outer
						(mm)
S1	Reinforced concrete	22.4	550	7.2	C30			31.26	100.86	3.33
S2	Reinforced concrete	72	550	7.2	C30			31.26	100.86	3.33
S3	Reinforced concrete	30	550	7.2	C40			33.74	100.86	3.33
S4	Reinforced concrete	30	550	7.2	C50			35.73	100.86	3.33
S5	Reinforced concrete	90	750	6.8	C50			35.73	127.78	4.42
S6	Reinforced concrete	54	750	6.8	C60	18	18	37.22	127.78	4.42
S7	Reinforced concrete	85	900	6.5	C60	18	18	37.22	145.08	5.2
S8	Steel-concrete composite	60	900	6.5	C60	10	10	40.84	145.08	5.37
S9	Steel-concrete composite	48	900	6.5	C70	16	10	41.86	145.08	5.43
S10	Steel-concrete composite	32	900	6.5	C70	20	16	43.83	145.08	5.56
S11	Steel-concrete composite	32	900	6.5	C70	25	20	45.53	145.08	5.66
S12	Steel-concrete composite	76	900	6.5	C70	30	25	47.46	145.08	5.79
S13	Steel-concrete composite	24	650	7.0	C70	20	16	46.5	114.9	4.27
S14	Reinforced concrete	1.6	650	7.0	C70			38.21	114.9	3.88
S15	Reinforced concrete	3	650	7.0	C70			38.21	114.9	3.88