THE MRT -disruptions unavoidable?
-
(:::)
-
nonsense...
simi shyt is unavoidable? then we shld get another company or staffs that will make it avoidable...
It's like saying "bo bian" then dun need to do anything/take responsibility...
-
Then why import so many aliens into Singapore and cause problems? Bullshit.
-
alamak, isit aeroplane drop from the sky oso unavoidable ???
if u dun noe how to calculate the periodical maintenance pls STFU
-
Time to kick him out of the house.
MRT overcrowded - cannot be helped
MRT breakdown - cannot be helped
Bus accident - cannot be helped
Haunted by pple he let down - cannot be helped
-
this can be help!!
This is machine, we can control it, repair it, renew it, replace it.
It's not like some flood
-
(::::)
-
He is obviously telling you that it is not his business when there is a fault.
When everything is ok, all croonies will be fighting for their chance to come forward to be interviewed and photographed.
When something happens, they are nowhere to be seen.
This is the new party that the boss is talking about.
-
Unavoidable lah.
-
When you see the system being abused everyday, working with overloaded capacities, things will fall apart very fast.
With so many breakdowns, SMRT is looking like an unreliable form of public transportation.
-
then we should cut down on the loitering redundant people in sg.
first by limiting those on social pass visit - question them why they are here - gamble or do crime?
-
There is safety factor in engineering.
It is not overloaded unless they are taking many elephants for every trip.
As long as it is well maintained, there should not be any breakdown.
Please dun believe in all the rubbish from people who took MRT ride for photo session on STOMP and no intention of solving REAL problem.
-
if this is unavoidable, reduce the mrt fares??? we r paying so much for these "unavoidable" things to happen?
-
Each MRT carriage is roughly 40 tonnes, add another 21 tonnes (320 x 65kg) for passengers. Around 60 tonnes of carriage weight is resting on the tracks, add friction during acceleration and braking.
On railways, a given section of track is designed to a maximum axle load. The maximum axle load is related to the strength of the track, which is determined by weight of rails, density of sleepers and fixtures, train speeds, amount of ballast, and strength of bridges. Because track and especially the rails are expensive, it is desirable to optimise the track for a given axle load. If the track is overloaded by trains that are too heavy, it can be destroyed in a short time. It is convenient for the steelworks that rails are made in a limited number of sizes, so that a perfect match of rail weight and axle load is rarely achieved. New rail is often reserved for heavy main line use, which releases good but lighter rail that can be cascaded for lighter duties on branch lines. The lightest rail cascaded from the lightest branch lines may have no railway use other that for structural items such as fenceposts, telegraph posts and for reinforcing concrete. Increase density of sleepers and reduce axle load can help to increase train speeds.
-
In the 80s and 90s, you hardly heard of so many train disruptions in a year.
Why?
I guess the system PAP envisaged then was for a population of 3-4 million. That's why you see every system is overloaded (e.g. HDB, hospitals, public transport).
-
Originally posted by βÎτά:
Each MRT carriage is roughly 40 tonnes, add another 21 tonnes (320 x 65kg) for passengers. Around 60 tonnes of carriage weight is resting on the tracks, add friction during acceleration and braking.
On railways, a given section of track is designed to a maximum axle load. The maximum axle load is related to the strength of the track, which is determined by weight of rails, density of sleepers and fixtures, train speeds, amount of ballast, and strength of bridges. Because track and especially the rails are expensive, it is desirable to optimise the track for a given axle load. If the track is overloaded by trains that are too heavy, it can be destroyed in a short time. It is convenient for the steelworks that rails are made in a limited number of sizes, so that a perfect match of rail weight and axle load is rarely achieved. New rail is often reserved for heavy main line use, which releases good but lighter rail that can be cascaded for lighter duties on branch lines. The lightest rail cascaded from the lightest branch lines may have no railway use other that for structural items such as fenceposts, telegraph posts and for reinforcing concrete. Increase density of sleepers and reduce axle load can help to increase train speeds.
alamak , the load is not at a single point , its distributed on the bogie down to the wheelsu sure can load 320 pax in 1 carriage?
-
Originally posted by lce:
alamak , the load is not at a single point , its distributed on the bogie down to the wheelsI didn't say single point did I?
It's distributed on the axles in the carriage.
But then 60 tonnes on steel, higher load, higher wear and tear.
-
system getting old...
need to overhaul.
-
Originally posted by βÎτά:
I didn't say single point did I?
It's distributed on the axles in the carriage.
But then 60 tonnes on steel, higher load, higher wear and tear.
how many wheels in a carriage? ... 8?
if 8, even at 60 ton, then its only 7.5 ton on @wheel so wat load u talking?
-
They don't use wheels, they use axle load.
A standard metro rail axle load is 12-13 tonnes.
Ask yourself this question.
Why fewer infrastructure breakdowns in 80s and 90s?
Either they are cutting corners in maintenance or they are doing the same maintenance for the excess passenger loads.
-
Originally posted by Clivebenss:
system getting old...
need to overhaul.
Not that the system getting old, but it's just that Singapore's system wasn't meant for above 4 million population.
-
Why you think they expanding the bus system (even to the extent of giving a private bus company money to buy more buses)?
If you place too much reliance on the MRT, once a line breaks down, a major part of your transportation system breaks down, everybody is affected.
If one bus breaks down, the magnitude is not great as the MRT.
Sometimes it's good to have spare capacity in a system, it's gives leeway for failures. Most of Singapore's system is working at full capacity due to the excess immigration population.
Say if there is a SARS event tomorrow, I can guarantee 1000%, the Singapore hospitals will never be able to handle the load.
In Singapore everything is all about efficiency, so much so that everything is over capacity.
An island state set for 100% failure if an unexpected event happens.
-
Originally posted by βÎτά:
They don't use wheels, they use axle load.
A standard metro rail axle load is 12-13 tonnes.
Ask yourself this question.
Why fewer infrastructure breakdowns in 80s and 90s?
Either they are cutting corners in maintenance or they are doing the same maintenance for the excess passenger loads.
whether axle ,bogie or wheel , the load is still on @wheel same as truck
problems dun lie on wat load is laden, its on the the foundation of the tracks , it sinks overtime on usage like our asphalt roads
-
The day they accept any drop in minumum requirement, the rot start to set in.
The breakdown is due to insufficient or incompetent maintenance and not due to any overloading.
Fixing the maintenance solve the problem and not shift the blame to lousy excuse of population expansion.
It is a issue of whether they are willing to pay the money to fix the issue or keep on using tie wrap for temporary fix.
Where is the courage and commitment to fix the issue a few month ago ?
Is accepting the breakdown as a norm a solution ?
Who is getting complacent now ?
-
Originally posted by lce:
whether axle ,bogie or wheel , the load is still on @wheel same as truck
problems dun lie on wat load is laden, its on the the foundation of the tracks , it sinks overtime on usage like our asphalt roads
I can't find wheel load when I googled. I guess they don't use that as a yardstick for measuring load on tracks. Maybe you can put your wheel load theory on Wikipedia.
The axle load of a wheeled vehicle is the total weight felt by the roadway for all wheels connected to a given axle. Viewed another way, it is the fraction of total vehicle weight resting on a given axle. Axle load is an important design consideration in the engineering of roadways and railways, as both are designed to tolerate a maximum weight-per-axle (axle load); exceeding the maximum rated axle load will cause damage to the roadway or rail tracks.
http://en.wikipedia.org/wiki/Axle_load