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Topic: Transbay Tube


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 [No title]
One such provision was to cushion the tube, shore to shore, in a trench of soft soil, gravel and mud.
The tube sections resemble huge binoculars in cross-section, 24 feet high and 48 feet wide, with trackways in each bore to carry trains in each direction, and are separated by an enclosed central corridor for pedestrian access, ventilation and utilities.
January 17, 1974 A train caught fire in the Transbay Tube which resulted in the tube closing for 12 weeks and the launching of a major fire safety program systemwide including the refurbishing of the entire fleet of BART transit cars with fire resistant materials.
www.bart.gov /docs/transbay.txt   (2440 words)

  
 Transbay Tube - Wikipedia, the free encyclopedia
The tube itself is 3.6 miles (5.7 km) long; including approaches from the nearest stations (one of which is underground), it totals 6 miles (9 km).
The western terminus of the tube directly connects to the downtown Market Street Subway near the Ferry Building, north of the Bay Bridge.
Note: The San Francisco-Oakland Bay Bridge crosses the Transbay Tube, so it is both upstream and downstream.
en.wikipedia.org /wiki/Transbay_Tube   (606 words)

  
 San Bruno B.A.R.T.
The Transbay Tube is the busiest and probably the most critical stretch of the BART system, carrying roughly 145,000 riders a day between West Oakland and downtown San Francisco at depths of as much as 135 feet below the bay's surface.
Designed in 1964 and 1965 and built between 1966 and 1969, the tube was constructed to withstand the largest conceivable earthquake, and BART officials used to boast that it was the safest place to be during a temblor.
On either side of the bay, the tube is joined to the San Francisco and Oakland approaches with massive seismic joints designed to let the tube shimmy and shake -- but not break -- during a major earthquake.
www.sanbrunobart.com /Bart2sfo/News/040417.shtml   (923 words)

  
 Seismic Assessment and Retrofit Concepts of the BART Transbay Tube   (Site not responding. Last check: 2007-10-25)
The tube is constructed of 57 segments with an average segment length of 330 feet.
The Transbay Tube is a critical link in the BART system and a key system element analyzed as part of the BART Seismic Retrofit Program.
Since the tube is submerged, it is important to ensure the structural integrity of the tube and the associated ventilation structures and seismic joints for the safety of passengers and BART personnel.
www.pubs.asce.org /WWWdisplay.cgi?0302220   (214 words)

  
 San Bruno B.A.R.T.
The tube carries two-thirds of all BART passengers and, during rush hour, the equivalent of one deck of the Bay Bridge.
Key to the Transbay Tube's survivability during an earthquake rests on a pair of seismic joints that allow the tube to flex.
The tube is surrounded by a bed of loose gravel as it lies in a trench at the bottom of the San Francisco Bay.
www.sanbrunobart.com /Bart2sfo/News/040417-1.shtml   (826 words)

  
 Tube   (Site not responding. Last check: 2007-10-25)
Transbay Tube an unerwater rail tube across the San Francisco Bay.
Transbay Tube an underwater rial tube across the San Francisco Bay.
Transbay Tube an underwater ril tube across the San Francisco Bay.
tbbs.corluge.com   (460 words)

  
 ContraCostaTimes.com | 10/17/2006 | Editorials Proceed with retrofit   (Site not responding. Last check: 2007-10-25)
IT IS A HAPPY circumstance that the BART retrofit of the Transbay Tube will not have to disrupt nearly as much of the San Francisco waterfront as had previously been thought.
The seismic retrofit of the Transbay Tube calls for sinking piles 180 feet tall and 10 feet in diameter into the mud of the San Francisco Bay.
It is part of a retrofit of the entire 3.6-mile Transbay Tube that is expected to take four years and cost $330 million.
www.dfw.com /mld/cctimes/news/local/states/california/15778209.htm   (335 words)

  
 Strobe Tube
It arose because a cathode ray tube is the major component in conventional television sets.
The Tube was also the name given by Vivian Stanshall for his infant daughter, Silky Longfellow-Stanshall...food went in one end and came out the other.
In surfing, the inside of a hollow wave is known as a tube.
www.breadlike.com /pages7/84/strobe-tube.html   (567 words)

  
 rebuildca.org - welcome
The electric commuter rail system is near the San Andreas fault, and straddles the Hayward fault, in a region geologists predict has a 62 percent chance of suffering a major 6.7 earthquake by 2032.
Preliminary work on the transbay tube has already begun and officials expect major work to commence next year.
The installation of piles, crossbeams and micropiles will help anchor the transbay tube in place and greatly reduce the risk of failure.
www.rebuildca.org /bart_aa_approved.html   (267 words)

  
 cbs5.com - BART Awards Contract To Strengthen Transbay Tube
BART officials say that although the Condon Johnson contract is to strengthen the Oakland end of the tube, the overall goal is to strengthen the entire length of the tube.
The transbay tube construction begins the first phase in the earthquake safety program, which will strengthen BART's stations and elevated tracks in addition to the tube.
That contract also is to determine the effectiveness of the vibro-compaction or vibro-replacement methods in the bay, install a limited number of vibro-replacment stone columns at two locations along the tube in the bay and provide additional information for use in the final design of the tube's retrofit.
cbs5.com /local/local_story_104100458.html   (693 words)

  
 ContraCostaTimes.com | 11/15/2006 | Costs climb for BART retrofit work   (Site not responding. Last check: 2007-10-25)
The retrofit work on the tube, which can hold 3,000 people in five trains at the height of a commute, is expected to be done a few years before the rest of the system.
Currently, much of the preliminary work has been done on the system, and the seismic retrofit of the Transbay Tube, which calls for sinking 180-foot-long and 10-foot-wide piles into the bottom of the San Francisco Bay, is well under way.
Considered the key link in the retrofit chain, the tube work is expected to take four years and cost $330 million to complete.
www.sanluisobispo.com /mld/sanluisobispo/news/state/16016602.htm   (750 words)

  
 San Francisco CITYSCAPE :: the online journal of bay area urban design [ Transit: Transbay Transit Center ]   (Site not responding. Last check: 2007-10-25)
The former is not going to happen, at least not soon; Caltrans, the state's infamous freeway-building agency, balked at the cost of leaving room for rail on the bridge's new east span, not to mention the cost of retrofitting the west span.
But the Transbay is only in part a transportation project; it's also a redevelopment project, one which, it just so happens, could add thousands of units of much-needed housing to the heart of the city, near transit (obviously) — and help pay for the terminal.
So the Transbay project is really three projects: A new train and bus station, a collection of new highrises, and the extension of an existing rail line.
www.sfcityscape.com /transit/transbay.html   (1634 words)

  
 Tube - Wikipedia, the free encyclopedia
Transbay Tube, an underwater rail tube across the San Francisco Bay
Tube, a children's programme with inflatable characters on SABC, South Africa
Tube and Berger, the alias of Dance/Electronica producers Arndt Rörig and Marco Vidovic from Germany
en.wikipedia.org /wiki/Tube   (247 words)

  
 Vactrain - The real meaning from Timesharetalk wikipedia
The modern concept of a vactrain, with evacuated tubes and maglev technology, was pioneered in the 1910s by American engineer Robert Goddard, who designed detailed prototypes while a university student.
Robert Salter called underground Very High Speed Transportation (tube shuttles) our nation's "logical next step." Sadly (and most probably due to the economic effects on the airline industry), the plans were never taken to the next stage.
The same method is already in use in the Transbay Tube.
www.timesharetalk.co.uk /wiki.asp?k=Vactrain   (764 words)

  
 cbs5.com - Malfunction Shuts Down BART's Transbay Tube
Tuesday after the agency determined that an apparent power loss in the tube was a false alarm, according to BART spokesman Linton Johnson.
A contractor working on the Oakland side of the tube appears to have hit a water line, which then flooded a BART computer room.
The flood seems to have caused the system to register a power failure in the tube even though that was not the case, Johnson said.
cbs5.com /local/local_story_164112721.html   (271 words)

  
 BART Unveils TransBay Tube Retrofit Plan - News
According to Johnson, there were 1300 people in the Transbay Tube when the Loma Preita earthquake occurred, but because the earthquake did not take place on a nearby fault, passengers did not experience any difficulties.
Each weekday, nearly half of BART's 325,000 riders pass through the Transbay Tube, and while Johnson said few people are likely to be in the tube during an earthquake, retrofitting should assuage passengers' fears during the approximately four-to-six-minute journey.
Johnson said retrofitting on the Oakland side of the Transbay Tube began in April, with the award of a $9.2 million contract to Condon Johnson and Associates and is part of a 10-year Earthquake Safety Program, costing $1.3 billion.
www.foxreno.com /news/10080892/detail.html   (468 words)

  
 BayRail Alliance   (Site not responding. Last check: 2007-10-25)
The opening of BART's transbay tube 27 years ago provided an effective transit alternative for those living near East Bay BART stations or with access to a car.
The Transbay Terminal was designed and built as a railway station at a location ideal for its downtown proximity and connections to transit on Market Street.
The Transbay project, as it currently stands, represents the greatest extent of advocacy of the project to date on behalf of San Francisco or East Bay leaders.
bayrailalliance.org /caltrain/dtx/tt-q_and_a.html   (2495 words)

  
 Caltrain Downtown Extension to a Rebuilt Transbay Terminal
We propose to rebuild the Transbay Terminal at its present location at First and Mission Streets and provide a direct rail tunnel connection to it from the current depot at Fourth and King Streets.
The Transbay Terminal is already the most active multimodal center in the region; served by 64 bus routes operated by AC Transit, MUNI, Golden Gate Transit and SamTrans, as well as by Amtrak and Greyhound intercity buses.
Presently, thirty-five transbay bus routes terminate at the Transbay Terminal providing access to the urban core of the East Bay, from El Sobrante to the north to Fremont to the south.
www.sonic.net /~mly/TTT-SFCTA.html   (2641 words)

  
 BART Transbay Tube In Trouble - The Hiveports Community   (Site not responding. Last check: 2007-10-25)
BART'S Transbay Tube may not be able to withstand a huge quake, engineers said Friday.
The main reason for this is that the flexible joints that connect the two tunnels are simply not flexible enough anymore.
If a the Transbay Tube becomes inoperable, the entire 103-mile BART network will likely be shut down for at least 2 1/2 years--a situation that BART wishes to avoid.
www.hiveports.com /index.php?showtopic=1259   (622 words)

  
 Continuation of a brief history
The BART transbay tube was paid for with bridge tolls – as compensation for the two Bridge Railway tracks removed from the lower deck in the early 1960s.
When the BART tube fire closed the system’s transbay capacities in 1979, buses and some ferries were pressed into service.
Unfortunately, once the BART tube reopened, the Berkeley Ferry lost enough passengers from the unsubsidized operation to slip into financial deficit and it was discontinued.
www.baycrossings.com /archives/2000/11_December_2000_January_2001/continuation_of_a_brief_history.htm   (695 words)

  
 Engineering Geology of the Bay Area Rapid Transit (BART) System, 1964-75
Feasibility studies for a transbay tube were completed in the early 1950s and submitted to the state for review in January 1956.
The tubes were set on 2 feet thick gravel blankets placed within 0.15 feet of design grade, across the floor of the dredged channel (Fig.
Vertical tolerance for the tube bedding was set at 0.15 feet, while the final resting positions of the tubes had top be within 2.5 inches of design location, due to the tangents and spirals of the design alignment.
www.sonic.net /~mly/www.geolith.com/bart   (12351 words)

  
 KCBS - False Alarm Prompts Rush Hour BART Delays
BART officials said there was one train inside at the time service was stopped, at the Transbay Tube's San Francisco end.
Johnson said a contractor working on the Oakland side of the tube appears to have hit a water line, which then flooded a BART computer room.
The flood seems to have caused the system to register a power failure in the tube even though that was not the case, he said.
www.kcbs.com /pages/45853.php   (317 words)

  
 San Bruno B.A.R.T.
BART has $143 million in hand for the job from Regional Measure 2, which was approved by voters in March and authorized an increase in bridge tolls to $3 in July.
The 3.6-mile tube, which opened on Sept. 16, 1974, and links San Francisco and the East Bay, is the busiest and most critical part of the 104- mile BART system.
When it was built in the late 1960s, the tube was considered state-of-the- art in its earthquake resistance.
www.sanbrunobart.com /Bart2sfo/News/040917.shtml   (663 words)

  
 sfweekly.com - News - Journey to the Center of BART
Friday, and we were waiting to take a rare peek at the Bay Area's great umbilical cord, the 30-year-old Transbay Tube.
We were ushered into a BART train, where, inevitably, someone shouted, "Who brought the canary?" And within minutes, we were walking along a catwalk in the dry, dusty air of the tube, dark but for a few jittery flashlights and the glow of the TV cameras.
The joint connects the underground tunnel to the tube; during a quake, it allows for a few inches of movement in any direction.
www.sfweekly.com /issues/2004-04-21/news/dogbites_1.html   (879 words)

  
 MTC -- Planning -- Bay Bridge
This feasibility level analysis was designed to identify possible transbay rail options and to determine whether any of these options is feasible from a structural engineering perspective, based on their impact on the Bay Bridge.
BART's Transbay tube will soon reach capacity, and transbay buses, mixing with vehicular traffic for at least a portion of their route, may not be able to compete for the market share that could otherwise be gained by transit.
While the cost of adding rail to the bridge is high, the cost of doing nothing may be higher, in terms of hours of delay, impact on the region's economic vitality and quality of life.
www.mtc.ca.gov /planning/bay_bridge/rail_study/chap6.htm   (765 words)

  
 ContraCostaTimes.com | 10/16/2006 | Farmers market safe in Transbay Tube plan
Supplemental engineering studies have revealed the soil under the piers behind the San Francisco Ferry Building to be more stable than first thought, BART board member James Fang said at a news conference in the plaza behind the historic building.
Sunday's unveiling was sandwiched between two seismic events that dramatize the need to act fast to make the Transbay Tube safe, Fang said.
Earlier this year, BART officials identified the Transbay Tube as a likely terrorist target as well.
www.contracostatimes.com /mld/cctimes/news/local/15770853.htm   (524 words)

  
 The Oakland Business Review   (Site not responding. Last check: 2007-10-25)
Various methods to strengthen the underwater Tube have been identified, and the right method will be determined based upon tests currently underway.
With the passage of Measure AA, BART anticipates that by mid-year 2005, the Request for Proposals for Final Design on the Transbay Tube and approaches will be issued to interested contractors.
In addition to the Transbay Tube, other parts of the original system need upgrades including stations, elevated trackways, parking structures, maintenance facilities and administrative offices located throughout the BART District.
www.oaklandchamber.com /obr_stories/2004_12_bart_bond.shtml   (471 words)

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