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Western Railroad Discussion > Caltrain ImagesDate: 07/30/15 23:57 Caltrain Images Author: atsf19455 Many of the structures from the 1903-07 Bayshore Cut-Off construction are being removed this year, such as the nearly 110 year old bridges seen in this series of pictures.
1. is a view of a southbound express coming out the tunnel as seen from the 22nd St bridge, which will be replaced along with the 23rd and Paul Ave bridges. These bridges are from 1906. 23rd St. and Paul Avenue have been closed to all traffic. I am not sure when 22nd St. will be closed, but I wonder if it will be after 23rd St. is complete because it will be very difficult for commuters to get across the tracks if both 23rd and 22nd St. are closed. Edited 3 time(s). Last edit at 08/15/15 00:05 by atsf19455. Date: 07/31/15 05:20 Re: Caltrain Images Author: 3rdswitch Nice shots. I think the biggest bridge pillars I have ever seen! Maybe that big in case of derailment so no damage to bridge?
JB Date: 07/31/15 08:01 Re: Caltrain Images Author: jkinzel 3rdswitch Wrote:
------------------------------------------------------- > Nice shots. I think the biggest bridge pillars I > have ever seen! Maybe that big in case of > derailment so no damage to bridge? > JB My guess, "earthquakes". It is California. Regards, John Date: 07/31/15 09:50 Re: Caltrain Images Author: PHall jkinzel Wrote:
------------------------------------------------------- > 3rdswitch Wrote: > -------------------------------------------------- > ----- > > Nice shots. I think the biggest bridge pillars > I > > have ever seen! Maybe that big in case of > > derailment so no damage to bridge? > > JB > > My guess, "earthquakes". It is California. > Regards, John Those pillars survived the Loma Pieta quake in 1989 with no damage. I guess CalTrans got the design right! Date: 07/31/15 10:34 Re: I-280 columns Author: timz If someone has 1970s pics of 23rd St station,
I'm guessing they'll show I-280 columns a bit skinnier than what's there now. Lots of freeway bridges got modified after 1989. When Caltrain put fences between the mains at most stations, they made a bit of room for them-- tracks maybe 15 ft apart. Suspect 23rd St was an exception, presumably because the I-280 columns didn't allow. Date: 07/31/15 10:51 Re: I-280 columns Author: dmaffei Nice photos with good human elements. I enjoy photos like these that rarely come up on this site. The large pillars seen in your photos of the freeway overhead were seismic upgrades after the 1989 quake. They put steel covers over the cement pillars to keep them from "blowing out" during the next quake. As one who was in SF for the 1989 quake, I often wonder what will happen in a "real" quake like the 1906 quake or the recent Japan quake hits?. Wondering how many of these seismic upgrades have been put to real world test rather than just lab tests? When that "P" wave hits, hold on SF during the next big one. What is big? 9 points for 6 minuets or better is a good start...We are overdue.
Edited 1 time(s). Last edit at 07/31/15 10:53 by dmaffei. Date: 07/31/15 12:45 Re: I-280 columns Author: atsf19455 You're right TimZ. There is a RobL photo of 23rd st. station from 23rd St. bridge showing exactly what you say about much smaller columns, square ones I believe.
timz Wrote: ------------------------------------------------------- > If someone has 1970s pics of 23rd St station, > I'm guessing they'll show I-280 columns a bit > skinnier than what's there now. Lots of freeway > bridges got modified after 1989. > > When Caltrain put fences between the mains > at most stations, they made a bit of room for > them-- tracks maybe 15 ft apart. Suspect > 23rd St was an exception, presumably > because the I-280 columns didn't allow. Date: 07/31/15 12:46 Re: I-280 columns Author: weather Goodstory and very nice images!@
Date: 07/31/15 14:17 Re: I-280 columns Author: timz Date: 07/31/15 15:14 Re: Caltrain Images Author: Bridg3guy FYI
UP practice today is to provide crash barriers between the Concrete Columns to deflect derailed cars or locomotives .When this was built it was long before this standard was put into play but as stated earlier in the message stream they were designed that large for the highway loads and most likely the possibility of earthquakes in this area. Ive seen many columns servive a direct hit with minor damage but Ive also seen some destroryed in the derailment speedis a big factor and the type of load . Steel coil cars and the coils themselves make for a nice battering ram. Note "cylindrical poured concrete shafts are called Columns and Pillars are something you sleep on at night ". ;-) |