Pullout Test on Fully Grouted Bolt Sheathed by Different Length of Segmented Steel Tubes
Table 3
Pullout results for all samples.
Groups
Samples
Linear reaction (Displ.-load)
Peak load (kN)
Displ. corresponds to peak load (mm)
Oscillation times
Final fract. form
Numbers for segments detachment
Final displ. (mm)
S1 (15 + 5 + 5 + 5)
1
—
—
—
—
—
—
—
2
9-106
157
48
0
Bolt fract.
2
64
3
10-100
156
49
0
Bolt fract.
2
58
S2 (15 + 5 + 10)
1
7-103
157
47
0
Bolt fract.
1
65
2
—
—
—
—
—
—
—
3
9-104
156
48
3
Decoupling
2
129
S3 (15 + 10 + 5)
1
7-107
158
49
0
Bolt fract.
2
74
2
8-102
159
48
4
Decoupling
2
161
3
9-105
161
48
0
Bolt fract.
2
69
S4 (15 + 15)
1
7-104
160
47
0
Bolt fract.
1
61
2
9-107
161
49
0
Bolt fract.
1
66
S5 (9 + 7 + 7 + 7)
1
9-105
131
23
0
Decoupling
2
44
2
14-106
142
43
1
Decoupling
2
92
3
13-105
140
42
0
Clamp detachment
2
49
S6 (10 + 5 + 15)
1
8-103
153
42
3
Decoupling
2
114
S7 (10 + 10 + 10)
1
8-102
153
43
3
Decoupling
2
106
2
8-103
154
42
3
Decoupling
2
110
S8 (10 + 15 + 5)
1
8-102
151
35
2
Decoupling
1
102
2
9-104
151
37
2
Decoupling
1
92
Pullout tests on them were failed due to the large section of grouping gap between bolt rod and steel tube, which was caused by improper preparation of specimens.
