ELSEVIER GEO-ENGINEERING BOOK SERIES VOLUME 5 Part 1 potx

... Concluding remarks 14 9 References 15 0 11 Blasting for tunnels and roadways 15 1 11 .1 Introduction 15 1 11 .2 Blasting mechanics 15 2 11 .3 Blast holes nomenclature 15 3 11 .4 Types of cut 15 4 11 .5 Tunnel blast ... performance 15 6 11 .6 Parameters influencing tunnel blast results 15 6 11 .7 Models for prediction of tunnel blast results 16 2 11 .8 Blast design 16 7 References...

Ngày tải lên: 08/08/2014, 13:21

... 45 ◦ 34 ◦ 27 ◦ 18 ◦ B. Rough, undulating 3.0 37 ◦ 27 ◦ 21 ◦ 14 ◦ C. Smooth, undulating 2.0 27 ◦ 18 ◦ 14 ◦ 9 .5 ◦ D. Slickensided, undulating 1 .5 21 ◦ 14 ◦ 11 ◦ 7 .1 ◦ E. Rough, planar 1 .5 21 ◦ 14 ◦ 11 ◦ 7 .1 ◦ F. ... (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 4 211 .9 J w 0.66 1 1 0.966 SRF 7 .5...

Ngày tải lên: 08/08/2014, 13:21

... London, Chapters5&9. Rabcewicz, L. V. (19 64 19 65) . The new Austrian tunnelling method. Water Power, Part I, 19 64, 453 - 457 ; Part II, 19 64, 51 1 - 51 5; and Part III, Jan. 19 65, 19 -24. Rabcewicz, ... (JRC) Amplitude (a) Length (L) a 2 a 1 Length of Profile, m Amplitude of Asperities, mm 20 16 12 10 8 6 5 4 3 2 1 0 .5 0 .1 0.2 0.3 0 .5 1. 0 2 3 5 10...

Ngày tải lên: 08/08/2014, 13:21

... 2,3 ,5, 13 c 4 1 2 .1 6 .5 > ;12 .5 <0. 75 0. 15 1 m 20–30 mm 2 4 1 2 .1 6 .5 > ;12 .5 <0. 75 0. 15 20–30 mm 2 4 1 2 .1 6 .5 <0. 75 0. 15 1 m 2 4 1 4 .5 11 .5 > ;10 <30> ;1 0. 15 1 m ≤ 2a 4 1 4 .5 11 .5 ... 5 14 > ;10 > ;1 .5 0. 05 1 .5 2 m 2 40 10 5 14 > ;10 < ;1 .5 0. 05 1 .5 2 m 20–30 mm 2 40 10 15 23 > ;10 0. 05 1 .5...

Ngày tải lên: 08/08/2014, 13:21

... 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 Interaction of rock parameters ... propagation Caverns at depth may induce less disconti- nuities movement τ δ 2 ,1 2,2 2,3 2,4 2 ,5 2,6 1, 1 1, 2 1, 3 1, 4 1 ,5 1, 6 3 ,1 3,2 3,3 3,4 3 ,5 3...

Ngày tải lên: 08/08/2014, 13:21

... advance Favorable ground 50 –60 m/month 200–700 m/month 350 –800 m/month 15 0 –300 m/month 50 0– 15 0 0 m/month Unfavorable ground 7 10 m/month 50 –60m/month 75 15 0 m/month 25 50 m/month 10 0–200 m/month Utilization of ... 0. 75 Long span bridge 250 30 280 0.90 Cut and cover 10 0 to 200 40 14 0 to 240 0.70 to 0.80 Tunnelled 15 0 to 50 0 50 200 to 55 0 0. 75 to 0.90 Tunnelling mach...

Ngày tải lên: 08/08/2014, 13:21

... noise 11 . 12 070 12 077 11 80 34 60 6 1 .5 3 1 2 .5 2.0 30 31. 9 63.7 23.8 55 .7 2.7 1. 14 Heavy burst Mod. slabbing with noise 12 . 12 087 12 223 11 80 42 67 6 1 .5 2 1 2 .5 3.4 45 31. 9 63.7 28.3 1 05. 2 2.3 0. 61 ... slabbing with noise 13 . 12 223 12 267 11 00 42 75 42 212 .57 .54 5 29.7 59 .4 37.0 10 8.7 1. 6 0 .55 Heavy burst Mod. slabbing with noise 14...

Ngày tải lên: 08/08/2014, 13:21

... Blended sand 6. 35 mm maximum size 14 83 16 79 697–880 3. 10 mm aggregate – 700–8 75 4. Steel fiber 39– 15 7 39– 15 0 5. Accelerator Varies Varies 6. Water/cement (by weight) 0.40–0. 45 0.40–0. 45 Advantages ... rocks Table 28 .1 Typical steel fiber reinforced shotcrete mix. Mean aggregate size 6. 35 mm Mean aggregate size 10 mm S. No. Material Quantity, kg/m 3 Quantity, kg/m 3 1. Ce...

Ngày tải lên: 08/08/2014, 13:21

... 48.0 14 .1 18 15 0 17 990 16 600 15 3 90 14 290 13 360 1 2 51 0 11 760 8 ′′ × 8 ′′ Wide flange 58 .0 17 .1 217 00 20030 1 856 0 17 240 16 110 15 1 10 14 210 8 ′′ × 8 ′′ Wide flange 67.0 19 .7 2 51 00 2 319 0 218 40 19 970 18 650 ... 9860 916 0 856 0 8020 753 0 8 ′′ × 8 ′′ Wide flange 35. 0 10 .3 15 6 40 14 250 13 110 12 040 11 160 10 370 9690 9070 853 0 8 ′′ × 8 ′′ Wi...

Ngày tải lên: 08/08/2014, 13:21

... xv Volume Editor's preface xix Acknowledgements xx List of abbreviations xxi 1 INTRODUCTION Robert Burchfield 1 1 .1 Variety and diversity 1 1.2 A general survey of the varieties 4 1. 3 ... Distinctive and shared features 8- 1. 4 Some general verdicts, comments and predictions 13 1 .5 Standard English: local or international ? 15 Further reading 18 PART I Reg...

Ngày tải lên: 05/08/2014, 14:20