Segment Tunnel Arc Bolt
Segment Tunnel Arc Bolt tshwj xeeb yog tsim los rau kev sib txuas ntawm tus kheej ntu nyob rau hauv ib lub qhov arched qauv. Cov bolts no feem ntau muaj cov duab tshwj xeeb thiab qhov ntau thiab tsawg kom haum rau cov kev cai tshwj xeeb ntawm cov qauv arched. Lawv lub luag haujlwm tseem ceeb yog los xyuas kom muaj kev nyab xeeb thiab ruaj khov ntawm lub qhov av tag nrho cov qauv.
Segment Qhov Arc Bolt Specification
| Dimension | Arc Ntev mm | Tensile zog | Kev kho saum npoo |
|---|---|---|---|
| M25-M39 | 480-880 | 4.6,4.8,5.6,5.8,8.8 | Dacromet, Kub dip Galvanized |
Segment Tunnel Arc Bolt Daim Ntawv Thov
Daim ntawv thov ntawm Segment Tunnel Arc Bolts yog ib qho tseem ceeb rau kev tsim kho thiab kev ruaj ntseg ntawm tunnels. Cov bolts tshwj xeeb no ua lub luag haujlwm tseem ceeb hauv kev sib txuas thiab kev ruaj ntseg ntu uas tsim cov txheej txheem ntawm lub qhov, tshwj xeeb yog cov uas muaj cov qauv tsim. Sib sau ua ke rau hauv ib lub voj voog cylindrical pipeline, cov bolts no pab txhawb rau tag nrho lub zog thiab kev ncaj ncees ntawm cov phab ntsa qhov.
Tunnel Segment Bolt Mechanical Property
| Tunnel Segment Bolt | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mechanical thiab Physical Properties | Qib Kev Ua Haujlwm | ||||||||||||
| 3.6 | 4.6 | 4.8 | 5.6 | 5.8 | 6.8 | 8.8 | 9.8 | 10.9 | 12.9 | ||||
| d Tsawg dua lossis sib npaug rau 163) | d＞163) | ||||||||||||
| Nominal Tensile zog | N / hli 2 | 300 | 400 | 500 | 600 | 800 | 800 | 900 | 1000 | 1200 | |||
| Tsawg kawg tensile zog | N / hli 2 | 330 | 400 | 420 | 500 | 520 | 600 | 800 | 830 | 900 | 1040 | 1220 | |
| Vickers hardness HV F Ntau dua los yog sib npaug rau 98N | min | 95 | 120 | 130 | 155 | 160 | 190 | 250 | 255 | 290 | 320 | 385 | |
| max | 2206) | 250 | 320 | 335 | 360 | 380 | 435 | ||||||
| Brinell hardness HB F =30 D2 | min | 90 | 114 | 124 | 147 | 152 | 181 | 238 | 242 | 276 | 304 | 366 | |
| max | 2096) | 238 | 304 | 318 | 342 | 361 | 414 | ||||||
| Rockwell hardness HR | min | HRB | 52 | 67 | 71 | 79 | 82 | 89 | / | / | / | / | / |
| HRC | / | / | / | / | / | / | 22 | 23 | 28 | 32 | 39 | ||
| max | HRB | 95.06) | 99.5 | / | / | / | / | / | |||||
| HRC | / | 32 | 34 | 37 | 39 | 44 | |||||||
| Nto hardness HV 0.3 max | / | 7) | |||||||||||
| Yield point N/mm2 | Nominal | 180 | 240 | 320 | 300 | 400 | 480 | / | / | / | / | / | |
| min | 190 | 240 | 340 | 300 | 420 | 180 | / | / | / | / | / | ||
| Qhia meej tsis sib npaug elongation stress N/mm2 | Nominal | / | / | 640 | 640 | 720 | 900 | 1080 | |||||
| min | / | / | 640 | 660 | 720 | 940 | 1100 | ||||||
| Guaranteed kev nyuaj siab N / mm2 | 0.94 | 0.94 | 0.91 | 0.93 | 0.9 | 0.92 | 0.91 | 0.91 | 0.90 | 0.88 | 0.88 | ||
| 180 | 225 | 310 | 280 | 380 | 440 | 580 | 600 | 650 | 830 | 970 | |||
| Rhuav torque MB, Nm min | / | raws li GB / T3098.13 cov cai | |||||||||||
| Elongation tom qab tawg % min | 25 | 22 | / | 20 | / | / | 12 | 12 | 10 | 9 | 8 | ||
| tus nqi txo hauv cheeb tsam % min | / | 52 | 48 | 48 | 44 | ||||||||
| Shock absorption ua hauj lwm Aku, min | 25 | 30 | 30 | 25 | 20 | 15 | |||||||
| Lub taub hau ruaj khov | Tsis so | ||||||||||||
| Yam tsawg kawg qhov siab ntawm undecarburized xov E | / | 1/2H1 | 2/3H1 | 3/4H1 | |||||||||
| Qhov siab tshaj plaws ntawm tag nrho decarburized txheej G, mm | / | 0.015 | |||||||||||
| Hardness tom qab tempering | / | Qhov sib txawv ntawm qhov nruab nrab hardness ua ntej thiab tom qab tempering tsis ntau tshaj 20HV | |||||||||||
| Deg tsis xws luag | Raws li GB / T 5779.1 lossis GB / T 5779.3 cov cai | ||||||||||||
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