ELSEVIER GEO-ENGINEERING BOOK SERIES VOLUME 5 Part 8 doc

... 446 55 8 >4 45 2. Blended sand 6. 35 mm maximum size 1 483 –1679 697 88 0 3. 10 mm aggregate – 700 8 75 4. Steel fiber 39– 157 39– 150 5. Accelerator Varies Varies 6. Water/cement (by weight) 0.40–0. 45 ... 28. 3. Wedge Sleeve Bolt Fig. 28. 7 Wedge and sleeve bolt. Integrated method of tunnelling 407 25mm 0.45mm 0 .53 mm 28mm 0 .50 mm Fig. 28. 2 Typical fibers used in shotcrete work....

Ngày tải lên: 08/08/2014, 13:21

... 0. 05 1 .5 2 m 20–30 mm 2 40–10 15 23 >10 0. 05 1 .5 2 m ≤ 2,3 b 40–10 15 23 >10 0. 05 1 .5 2 m 50 –100 mm 2,3 c 40–10 9– 15 0. 05 1 .5 2 m ≤ 2,4 b 40–10 15 40 >10 0. 05 1 .5 2 m ≤ 2,3 ,5 b 40–10 15 40 ... 0.0 25 2–3 m 100–40 23–72 >30 0.0 25 1 .5 2 m ≤ b 40–10 5 14 >10 >1 .5 0. 05 ≤ 2 40–10 5 14 >10 <1 .5 0. 05 1 .5 2 m 2 40–10 5 14 >10 >1 .5 0...

Ngày tải lên: 08/08/2014, 13:21

... 75 42212 .57 .54 5 29.7 59 .4 37.0 1 08. 7 1.6 0 .55 Heavy burst Mod. slabbing with noise 14. 12273–12322 1090 50 70 43312 .57 .0 45 29.4 58 .9 36.2 107.2 1.6 0 .55 Heavy burst Mod. slabbing with noise 15. ... 36.2 107.2 1.6 0 .55 Heavy burst Mod. slabbing with noise 15. 12 359 –124 28 1060 50 75 6 1 .5 2 1 2 .5 3 .8 45 28. 6 57 .2 29.4 98 .5 1.9 0 . 58 Heavy burst Mod. slabb...

Ngày tải lên: 08/08/2014, 13:21

... Rights Department in Oxford, UK: phone (+44) 18 65 84 383 0, fax (+44) 18 65 85 3 333, e-mail: permissions @elsevier. com. Requests may also be completed on-line via the Elsevier homepage (http://www .elsevier. com/locate/permissions). In ... to 15 cm 10 to 15 cm Rock bolt as required (1.2 to 1 .8 m center to center) xii Contents 5. 3 Updating the Q-system 58 5. 4 Collection of fi...

Ngày tải lên: 08/08/2014, 13:21

... typical value (60%) Maximum value (30%) Weighted average RQD 25 65 85 67 J n 12 9 – 9.42 J r 1 .5 3 4 2. 05 J a 4211.9 J w 0.66 1 1 0.966 SRF 7 .5 5 2 .5 4 .5 observed parameter, i.e., 10% poorest, 60% most typical, ... undulating 1 .5 63 ◦ 56 ◦ 37 ◦ 27 ◦ 21 ◦ E. Rough, planar 1 .5 63 ◦ 56 ◦ 37 ◦ 27 ◦ 21 ◦ F. Smooth, planar 1.0 53 ◦ 45 ◦ 27 ◦ 18 ◦ 14 ◦ G. Slickensided, pla...

Ngày tải lên: 08/08/2014, 13:21

... (MPa) (1) (2) (3) 0 .5 2.7 0 .86 1 2.2 0.7 2 1 .5 0.4 75 3 1.2 0. 38 4 1.0 0.317 5 0 .8 0. 25 0123 456 0.2 0.4 0.6 0 .8 1.0 Boundary Conditions Tunnel depth = 50 0m Tunnel radius = 5m Rock mass number ... and Metallurgy, London, Chapters5&9. Rabcewicz, L. V. (1964–19 65) . The new Austrian tunnelling method. Water Power, Part I, 1964, 453 - 457 ; Part II, 1964, 51 1 -51...

Ngày tải lên: 08/08/2014, 13:21

... new discontinuities Less discontinuities induced in good quality rock mass 4,1 4,2 4,3 4,4 4 ,5 4,6 5, 1 5, 2 5, 3 5, 4 5, 5 5, 6 6,1 6,2 6,3 6,4 6 ,5 6,6 Larger caverns may be created in better quality rock masses Fig. 13.2a ... 6, 189 -236. Dube, A. K. and Singh, B. (1 986 ). Study of squeezing pressure phenomenon in a tunnel – Part I and II. Tunnelling and Underground Space Techn...

Ngày tải lên: 08/08/2014, 13:21

... (surface) 25 30 55 0. 45 Elevated (super structure) 100 30 130 0. 75 Long span bridge 250 30 280 0.90 Cut and cover 100 to 200 40 140 to 240 0.70 to 0 .80 Tunnelled 150 to 50 0 50 200 to 55 0 0. 75 to 0.90 Tunnelling ... advance Favorable ground 50 –60 m/month 200–700 m/month 350 80 0 m/month 150 –300 m/month 50 0– 150 0 m/month Unfavorable ground 7–10 m/month 50 –60m/month 75 150...

Ngày tải lên: 08/08/2014, 13:21

... 6 ′′ H 25. 0 – 1 180 0 1 057 0 957 0 87 10 80 40 7360 683 0 6 350 59 30 7 ′′ I 15. 3 4 .50 59 90 54 50 4990 4610 8 ′′ I 18. 4 5. 41 7640 6 950 6370 58 60 54 50 8 ′′ I 23.0 6.77 86 40 82 90 7600 7010 650 0 6040 56 40 52 80 ... 45 4 .8 28. 7 35. 1 112.9 83 .4 70.2 6 1300 2.0 60 45 4 .8 23 .8 35. 1 1 08. 0 83 .4 70.2 7 1300 1 .8 55 45 4 .8 23.1 35. 1 107.3 80 .5 70...

Ngày tải lên: 08/08/2014, 13:21

... 'cliff' (17 85 ) and platteland. Many 'new' topographical words appear in English between 17 95 and 183 8. These include berg 'mountain' ( 182 3); bushveldfrom SAfrDu. bosveld ( 182 2); ... ( 180 1); drift 'ford' (17 95) ; land 'a cultivated field' ( 18 15) ; poort 'narrow pass' (1796); rand 'ridge' ( 182 2) and veld &...

Ngày tải lên: 05/08/2014, 14:20