1 00:00:06,180 --> 00:00:10,055 Chronicle of construction of Nanjing Chang Weisan Road Tunnel 2 00:00:14,558 --> 00:00:18,744 Nanjing Chang Weisan Road under-river tunnel 3 00:00:19,745 --> 00:00:22,431 is one of the channels across the Yangtze River for Nanjing 4 00:00:24,121 --> 00:00:25,994 the connection between the old downtown 5 00:00:26,933 --> 00:00:27,496 and the new urban district 6 00:00:28,309 --> 00:00:29,120 and the Jiangbei new urban area 7 00:00:30,244 --> 00:00:30,747 it is the most convinient 8 00:00:31,496 --> 00:00:31,995 and fastest way 9 00:00:33,433 --> 00:00:36,370 this tunnel is located 10 00:00:37,058 --> 00:00:39,182 at 5 kilometers upreach from the Nanjing Yangtze River Bridge 11 00:00:40,808 --> 00:00:42,870 4 kilometers from 12 00:00:43,873 --> 00:00:45,681 the established Nanjing Weiqi Road under-river tunnel 13 00:00:46,496 --> 00:00:47,244 it's divided into S line and N line 14 00:00:48,184 --> 00:00:48,997 consisting of 15 00:00:49,809 --> 00:00:50,433 connection road 16 00:00:51,183 --> 00:00:52,936 cut and cover road in north bank 17 00:00:53,559 --> 00:00:54,244 the start work well in the north bank 18 00:00:55,622 --> 00:00:57,435 the work well in the south bank 19 00:00:58,372 --> 00:00:59,681 cut and cover road in the south road 20 00:01:01,747 --> 00:01:02,307 the S line 21 00:01:03,121 --> 00:01:04,307 starts from the work well in the north bank 22 00:01:05,373 --> 00:01:07,058 passing through the Yangtze River embankment in north bank 23 00:01:07,746 --> 00:01:08,872 the Qianzhou Island and Meizhou Island 24 00:01:09,560 --> 00:01:10,184 reaching the south bank 25 00:01:11,120 --> 00:01:13,121 and is connected to the Dinghuai Road 26 00:01:14,123 --> 00:01:14,748 and the Jiangtong North Road 27 00:01:15,560 --> 00:01:15,996 with a total length of 7.3 kilometers 28 00:01:17,120 --> 00:01:17,748 the N line 29 00:01:18,620 --> 00:01:19,682 starts from the work well in the north bank 30 00:01:20,748 --> 00:01:22,122 passing through the Yangtze River embankment in north bank 31 00:01:22,745 --> 00:01:23,434 Qianzhou Island 32 00:01:23,997 --> 00:01:25,183 reaching the south bank 33 00:01:26,185 --> 00:01:27,812 and is connected to the Yangtze River Road 34 00:01:28,624 --> 00:01:29,372 with a total length of about 7 kilometers 35 00:01:36,435 --> 00:01:37,809 Weisan Road under-tiver tunnel 36 00:01:38,621 --> 00:01:39,058 has two layers 37 00:01:39,747 --> 00:01:41,749 with eight lanes 38 00:01:42,749 --> 00:01:44,249 this allows the city to make full use of the room 39 00:01:44,935 --> 00:01:46,308 allowing more cars to pass 40 00:01:54,562 --> 00:01:57,310 just as an old saying goes:Good tools are essential things 41 00:01:58,375 --> 00:02:00,436 in order to solve a series of construction problems 42 00:02:01,563 --> 00:02:03,436 the most important thing is the shield tunneling machine 43 00:02:04,372 --> 00:02:06,434 Tianhe Mechanical Equipment Manufacturing CO., Ltd 44 00:02:07,124 --> 00:02:08,749 accepted this order 45 00:02:09,810 --> 00:02:11,560 to prodive the crossing-river tunnel construction 46 00:02:12,372 --> 00:02:13,809 with two super large slurry air balanced mis shield machine 47 00:02:15,250 --> 00:02:18,309 whose diameter is 14.98m 48 00:02:24,561 --> 00:02:25,748 this giant shield tunneling machine 49 00:02:26,435 --> 00:02:28,312 in terms of construction plan£¬design and idea 50 00:02:29,373 --> 00:02:30,436 is totally different with 51 00:02:31,126 --> 00:02:31,935 the small and medium-sized shield tunneling machine 52 00:02:33,063 --> 00:02:34,749 Weisan Roand unde-river tunnel is 53 00:02:35,374 --> 00:02:36,435 the first one China with complicated geology 54 00:02:37,687 --> 00:02:38,811 it has to pass through 55 00:02:39,435 --> 00:02:41,186 stratums such as mollisol,hard rock,sandy gravel 56 00:02:42,126 --> 00:02:44,685 the working water pressure is 0.72 MPa 57 00:02:45,998 --> 00:02:47,498 this means for Zhongjiao company 58 00:02:48,062 --> 00:02:48,562 around the world 59 00:02:49,311 --> 00:02:51,811 it can't find any case to learn 60 00:02:53,374 --> 00:02:54,313 with 8 months' effort 61 00:02:55,249 --> 00:02:57,063 they succeeded 62 00:02:58,185 --> 00:03:00,498 here is the most complicated cutterhead in the world 63 00:03:01,185 --> 00:03:02,689 the machine is with a total weight of about 5000 tons 64 00:03:03,499 --> 00:03:06,188 in this giant cutterhead 65 00:03:07,062 --> 00:03:08,437 there are 717 tools. 66 00:03:09,688 --> 00:03:11,437 different color means different types of tools 67 00:03:14,876 --> 00:03:15,874 these two giants 68 00:03:16,691 --> 00:03:17,377 will dig 69 00:03:18,124 --> 00:03:19,124 under the Yangtze River 70 00:03:21,937 --> 00:03:22,314 at the same time 71 00:03:22,999 --> 00:03:24,250 Zhongjiao company also developed 72 00:03:24,877 --> 00:03:26,812 technology of extra long distance digging tools 73 00:03:27,499 --> 00:03:28,376 the extension section of tools 74 00:03:29,061 --> 00:03:30,561 the disc cutters 75 00:03:31,375 --> 00:03:33,375 the first ever cutter changing technology 76 00:03:39,752 --> 00:03:41,252 during the design of the giant TBM 77 00:03:41,936 --> 00:03:43,938 Tianhe won 18 intellectual properties 78 00:03:44,751 --> 00:03:45,564 9 patents for invention 79 00:03:47,062 --> 00:03:48,939 by integrated innovation Tianhe 80 00:03:49,876 --> 00:03:53,437 the company developed what is usually monopoled by foreign countries 81 00:03:54,500 --> 00:03:56,565 the giant shield machine 82 00:03:57,091 --> 00:03:59,064 and Tianhe became the only one 83 00:03:59,688 --> 00:04:00,951 that can design and manufacture giant shield machine 84 00:04:34,314 --> 00:04:35,878 on 20, July 2012 85 00:04:36,752 --> 00:04:37,438 with the director's order 86 00:04:38,066 --> 00:04:41,376 Tianhe No.1 began to work on the Nanjing Weisan Road 87 00:04:42,877 --> 00:04:43,440 with the boom 88 00:04:44,192 --> 00:04:47,063 the giant cutterhead was working in the dark undergorund 89 00:04:47,814 --> 00:04:49,880 the soil with water digged out 90 00:04:50,503 --> 00:04:52,188 would be delivered to the gound through mud pipes 91 00:04:53,252 --> 00:04:55,564 it would dig a tunnel under the river 92 00:04:56,254 --> 00:04:57,629 from the north bank of the Yangtze river to the south 93 00:05:06,439 --> 00:05:07,690 on 1, 11 2012 94 00:05:08,441 --> 00:05:10,065 the digging speed and angle of the TBM 95 00:05:10,754 --> 00:05:11,254 went wrong 96 00:05:12,130 --> 00:05:14,003 the cutterhead got stuck by unknown materials 97 00:05:14,753 --> 00:05:15,503 it can't move forward 98 00:05:16,628 --> 00:05:18,127 there were a lot of answers for it 99 00:05:19,378 --> 00:05:20,380 some one said it was shipwreck 100 00:05:20,942 --> 00:05:22,127 some said it was deadwood 101 00:05:24,002 --> 00:05:24,439 at this key moment 102 00:05:25,064 --> 00:05:26,692 the the extension section of tools created by Tianhe 103 00:05:27,378 --> 00:05:28,880 helped solve the problem 104 00:05:31,255 --> 00:05:33,630 the cutterhead can retract 10 cm 105 00:05:34,441 --> 00:05:35,002 during the retraction 106 00:05:35,503 --> 00:05:37,131 the cutterhead can cut the obstacles repeatedly 107 00:05:38,131 --> 00:05:38,803 moving foreard step by step 108 00:05:39,318 --> 00:05:40,255 later during checking 109 00:05:40,818 --> 00:05:41,941 dredge pipe 110 00:05:42,506 --> 00:05:45,004 the engineers found there were deadwood 111 00:05:46,629 --> 00:05:48,314 problem continued to rise from one to the next 112 00:05:49,565 --> 00:05:50,441 in January 2014 113 00:05:51,254 --> 00:05:53,067 the digging speed went wrong again 114 00:05:54,129 --> 00:05:55,943 from the mud from the dredge pipe 115 00:05:56,505 --> 00:05:58,255 engineers found many big stones 116 00:05:59,066 --> 00:06:00,631 this was really a problem for them 117 00:06:01,255 --> 00:06:02,380 because according to the geology exploration 118 00:06:03,191 --> 00:06:05,132 there were no such stones here 119 00:06:06,131 --> 00:06:07,881 where did they come from 120 00:06:13,258 --> 00:06:14,754 it turned out in the 1950s 121 00:06:15,880 --> 00:06:17,005 to fight against the flood 122 00:06:17,754 --> 00:06:19,381 the government of Nanjing organised citizens to 123 00:06:20,130 --> 00:06:21,066 throw stones into the Yangtze river 124 00:06:22,130 --> 00:06:23,382 after years 125 00:06:24,754 --> 00:06:26,066 these stones with a diameter of about 50cm 126 00:06:26,943 --> 00:06:28,444 now pile on the Yangtze River embankment 127 00:06:29,565 --> 00:06:31,753 where the TBN need to dig 128 00:06:33,069 --> 00:06:33,568 to pass this area 129 00:06:34,569 --> 00:06:37,131 the engineers had to garantee the smooth of the dredge pipe 130 00:06:38,067 --> 00:06:38,821 finally they 131 00:06:39,442 --> 00:06:39,942 solved the problem 132 00:06:40,693 --> 00:06:42,005 by circulation loop 133 00:06:43,319 --> 00:06:45,005 Tianhe No.1, without changing cutters 134 00:06:46,008 --> 00:06:48,193 digged 1100 meters 135 00:06:48,881 --> 00:06:50,443 which set a world record 136 00:07:07,758 --> 00:07:09,507 tail brush is designed to prevent 137 00:07:10,258 --> 00:07:12,132 water from getting into tunnel 138 00:07:13,444 --> 00:07:16,067 although this TBM had 5 tail brushes 139 00:07:17,317 --> 00:07:18,256 after a while 140 00:07:18,943 --> 00:07:20,384 they were wore out 141 00:07:21,383 --> 00:07:23,696 the engineers used the method of circular frozen 142 00:07:24,507 --> 00:07:27,508 using liquid nitrogen to freeze certain amount of water 143 00:07:28,260 --> 00:07:29,256 to form a cryosphere 144 00:07:30,134 --> 00:07:31,068 which can provide enough time 145 00:07:31,694 --> 00:07:32,446 to change tail brushes 146 00:07:33,692 --> 00:07:34,383 the engineers froze 147 00:07:35,383 --> 00:07:36,194 waters of The Yangtze river 148 00:07:36,945 --> 00:07:37,820 at the bottole the river,70 deep 149 00:07:40,008 --> 00:07:40,632 for 10 days 150 00:07:41,696 --> 00:07:42,443 to freeze Yangtze river water 151 00:07:43,071 --> 00:07:44,259 sounds impossible 152 00:07:45,131 --> 00:07:45,694 but engineers 153 00:07:46,320 --> 00:07:47,070 succeeded 154 00:07:48,134 --> 00:07:48,694 usint this method 155 00:07:49,318 --> 00:07:51,258 they changed the tail brushes 156 00:07:52,008 --> 00:07:52,760 to freeze Yangtze river water 157 00:07:53,443 --> 00:07:56,071 is also the first time in China 158 00:07:59,257 --> 00:07:59,883 in February 2014 159 00:08:00,568 --> 00:08:01,382 the digging speed of the TBM 160 00:08:01,945 --> 00:08:02,757 slowed down suddenly 161 00:08:03,698 --> 00:08:04,446 the TBM came accross 162 00:08:05,134 --> 00:08:06,070 the 500-long stratum 163 00:08:07,006 --> 00:08:09,194 the rock strength is 120 MPa 164 00:08:10,134 --> 00:08:12,383 while the normal concrete strenth is no more than 165 00:08:12,757 --> 00:08:13,009 40 Mpa 166 00:08:14,320 --> 00:08:15,195 high strength rock 167 00:08:15,819 --> 00:08:17,507 made the cutters wear out very quickly 168 00:08:18,632 --> 00:08:18,945 now 169 00:08:19,445 --> 00:08:22,258 the TBM is at 63.049m below the Yangtze River surface 170 00:08:22,822 --> 00:08:25,135 the deepest place of the crossing- river tunnel 171 00:08:25,945 --> 00:08:28,133 with a water pressure of 0.72 Mpa 172 00:08:29,385 --> 00:08:32,009 this is the first ever in the world 173 00:08:32,697 --> 00:08:33,196 the biggest pressure for TBM 174 00:08:34,194 --> 00:08:34,698 in this conditon 175 00:08:35,446 --> 00:08:36,009 the cutterhead need to 176 00:08:36,633 --> 00:08:37,696 be changed mannually 177 00:08:39,635 --> 00:08:41,385 but to work under this water pressure 178 00:08:41,948 --> 00:08:43,695 is out of the Chinese working standard 179 00:08:45,073 --> 00:08:46,321 in other words, according to Chinese standard 180 00:08:47,071 --> 00:08:48,761 to change cutters mannually is not allowed 181 00:08:50,947 --> 00:08:51,574 finally engineers 182 00:08:52,073 --> 00:08:53,009 found a German company 183 00:08:53,885 --> 00:08:54,509 according to German standard 184 00:08:55,261 --> 00:08:57,133 worker can workd under the wair pressure of 0.7Mpa 185 00:08:59,885 --> 00:09:01,508 under the air pressure of 0.6Mpa 186 00:09:01,885 --> 00:09:04,512 workers can't work for more than 50 minutes on time 187 00:09:05,762 --> 00:09:06,571 during these minutes 188 00:09:07,448 --> 00:09:10,384 more than 20 minutes is used to open and close the door 189 00:09:12,009 --> 00:09:13,509 so engineer had an idea 190 00:09:14,260 --> 00:09:16,762 to transport a space capsule into the tunnel 191 00:09:17,700 --> 00:09:18,949 with special gas 192 00:09:19,573 --> 00:09:21,947 and on the ground there is a hyperbaric chamber for living 193 00:09:30,073 --> 00:09:31,321 these special workers should 194 00:09:32,075 --> 00:09:32,759 live under pressure for a long time 195 00:09:33,447 --> 00:09:34,887 so their body can get used to the environment 196 00:09:40,887 --> 00:09:41,323 when they need to work 197 00:09:41,761 --> 00:09:44,136 the living chamber will be transported into the tunnel 198 00:10:28,075 --> 00:10:28,949 and connected to the working chamber 199 00:10:29,825 --> 00:10:33,447 workers can get to the working chamber with same pressure 200 00:10:34,449 --> 00:10:34,826 from the living chamber 201 00:10:35,575 --> 00:10:36,202 the working can be extended to 202 00:10:37,013 --> 00:10:38,262 more than 4 hours from 50 minutes 203 00:10:57,390 --> 00:10:58,949 on 22, June 2015 204 00:10:59,823 --> 00:11:02,888 the TBM Tianhe came out from the bottom of the river 205 00:11:03,515 --> 00:11:04,012 from the soil 206 00:11:04,636 --> 00:11:05,013 seeing the sunshine again 207 00:11:05,699 --> 00:11:06,450 passing many diffulties 208 00:11:07,201 --> 00:11:08,075 the cutterhead from a colored one 209 00:11:08,823 --> 00:11:10,137 turned into silver grey 210 00:11:11,263 --> 00:11:12,451 just like a young man 211 00:11:13,448 --> 00:11:14,453 after going thorough many difficulties 212 00:11:15,077 --> 00:11:17,074 finally grows up 213 00:11:25,324 --> 00:11:25,825 on 2, July 214 00:11:26,324 --> 00:11:28,075 Tianhe No. 1 also came out from the underground 215 00:11:29,013 --> 00:11:31,515 Nanjing Chang Weisan Road crossing river tunnel was dig through 216 00:11:32,265 --> 00:11:34,139 the good news spread across both sides of the Yangze River 217 00:11:54,077 --> 00:11:56,391 if you have a bird`s view of NanJing-Yangze River Tunnel 218 00:11:57,077 --> 00:11:59,327 you will find three majestical ventilation shafts 219 00:11:59,892 --> 00:12:01,391 the surface of the north ventilation shaft 220 00:12:02,141 --> 00:12:03,516 used constantly changing shapes 221 00:12:04,390 --> 00:12:05,202 ups and downs 222 00:12:06,139 --> 00:12:06,515 which shows 223 00:12:07,013 --> 00:12:08,138 Nanjing`s rapid development 224 00:12:08,891 --> 00:12:10,267 and constant innovations 225 00:12:15,017 --> 00:12:15,515 as for the south ventilation shaft 226 00:12:16,077 --> 00:12:18,515 it is located in the scenic area of Yangtze River 227 00:12:19,513 --> 00:12:21,829 so while meeting the need of exhaust air and air supply 228 00:12:22,453 --> 00:12:23,952 it adopted the shape of sail 229 00:12:24,765 --> 00:12:26,390 meaning that everything is going smoothly 230 00:12:27,265 --> 00:12:27,891 and is in harmony with 231 00:12:28,639 --> 00:12:30,451 scenery sights along the banks 232 00:12:31,954 --> 00:12:34,828 showing the rhythm and sense of wholeness 233 00:12:40,765 --> 00:12:41,580 the most characteristic one 234 00:12:42,077 --> 00:12:43,330 the Mei Zizhou island ventilation shaft 235 00:12:43,890 --> 00:12:44,704 it looks like a granary 236 00:12:45,327 --> 00:12:46,268 which means good harvests 237 00:12:47,328 --> 00:12:48,578 It used the modern landscape design language 238 00:12:49,393 --> 00:12:50,078 to show the old 239 00:12:50,515 --> 00:12:53,141 and distinctive Nanjing culture 240 00:12:54,017 --> 00:12:55,642 it is also a modern shaft 241 00:12:56,266 --> 00:12:59,204 which is full of regional culature features 242 00:13:20,578 --> 00:13:21,952 in the Weisan Road crossing river tunnel 243 00:13:23,894 --> 00:13:25,892 various vehicles can move in it 244 00:13:26,955 --> 00:13:28,829 the drivers can experience the new LED 245 00:13:29,644 --> 00:13:32,079 which is very comfortable 246 00:13:33,452 --> 00:13:36,518 It is also a symbol of energy conservation and environment protection 247 00:13:50,579 --> 00:13:54,079 by porper layout data acquisition equipment of the field River Estuary 248 00:13:54,895 --> 00:13:56,581 the powerful integrated monitoring system platform 249 00:13:57,519 --> 00:14:00,519 can analyze, process and release many information 250 00:14:02,205 --> 00:14:04,893 trying to attain automatic control of the reaffic flow 251 00:14:05,641 --> 00:14:09,145 this realizes the concept of Intelligent Transportation of Zhongjiao 252 00:14:09,846 --> 00:14:13,846 chieving the enterprise vision of making the world more smooth