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Nairaland Forum / Nairaland / General / Properties / Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) (17572 Views)
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Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by tk4rd: 8:01am On May 25, 2016 |
Dollyak:The drawings in the post are hand-drawn sketches for illustration purposes.. The job itself is so untidy. Maybe they were cutting costs, or they were done without design, or they were sublet to subcontractors who are more-or-less roadside artisans |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by kikies(m): 8:05am On May 25, 2016 |
Dollyak:So on dis matter wey dey ground now,na dis drawing b ur problem. Sorry ma.....best graduating student 1 Like |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by iamord(m): 8:10am On May 25, 2016 |
Sorry to say but some masons and contractors are not reliable. You wonder if they really went to school . If they did. The questions begging for answers is that what do they teach them This is a shoddy work and will come back hunting the area |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by overboard(m): 8:14am On May 25, 2016 |
I'm sure the argument that roads are to be made before structures are erected are valid but methinks even with the attendant lack of order, road contractors embarking on any road construction/renovation project should embark on adequate survey of any place they are to work and factor in the costs of reasonably suitable solution for such buildings that may have issues. In cases where they costs may exceed reasonable threshold, building owners be advised prior to the work to find a lasting solution to the matter Just a thought. 1 Like |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by kkfox(m): 8:17am On May 25, 2016 |
Bros na government you go blame. The contractor builds the roads while the Town Planning departments enforce setbacks, many times government won't pay compensation for properties to be demolished or as is common in PH they'll pay part and severe the buildings. nedu2000: |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 8:19am On May 25, 2016 |
kkfox:...but it's not about paying compensation,just dig deeper and take levels so that the stand-in residence don't get affected,its laziness/greed |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by hotspec(m): 8:22am On May 25, 2016 |
Dollyak:design ur own and lets see it. Experienced university OVERgraduate 2 Likes |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by comodo: 8:22am On May 25, 2016 |
Because we always want to save cost when building we don't consider the inverts on existing roads and make critical adjustments in our buildings. The contractor is doing the right thing. The house owners effd up big time. |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 8:23am On May 25, 2016 |
whirlwind7:there's a way round the design where everyone will be accommodated,if the gutters are lower using the house with the lowest levels as benchmark,the centre of the road can still be raised such that 'run-off'( water) still flows into the drainages(gutter). Its just a matter of design. I studied civil engineering/hydrology |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 8:26am On May 25, 2016 |
lonngmann:there are people who raised their foundations 2metres above the ground,in 1984!! By 2016,settlements would make the building seem to be lower. Settlement is a normal thing in all buildings |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 8:33am On May 25, 2016 |
Excelento: sheunflexy:what about houses built with solid foundation,2metres off the ground in 1984 or even in the 90s and the roads in their areas done in 2014!Settlement is inevitable remember,even if it's julius berger that built it for you,it will sink albeit gradually |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 8:35am On May 25, 2016 |
lagbaja: |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by tunergy(m): 8:49am On May 25, 2016 |
nedu2000: This Flooded portion is part of your property, were you expecting Govt to do something for you. My friend, please Fill that portion and enjoy ya home. |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 8:54am On May 25, 2016 |
tunergy:it's unfair,what abt the level of your entrance door?if you fill it,your door will be affected |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by Calbarian(m): 9:02am On May 25, 2016 |
geniusgenes: Wrong. The contractors refuse to dig deeper to achieve a lower drainage/gutter base (which ideally should be totally subterranean). It costs a bit more and they'd have factored that in at the quotation stage only to turn around to modify it at the execution stage. I don't blame them though. It's the people who are supposed to but don't inspect these public works that, in my opinion, are to blame. |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by lonelydora: 9:14am On May 25, 2016 |
YKC - Slaughter axis in PH. Newly constructed Eleme - Akpajo axis, most GRA roads. I have been compiling lists to do a write up on this issues. That's sheer wickedness. 1 Like |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by adanny01(m): 9:26am On May 25, 2016 |
nedu2000: This is what we call road profile. There is the vertical and the horizontal road profile. The vertical profile otherwise called elevation handles two major factors in road construction. 1. Cut/fill to achieve an even road surface. You dont expect a road design to follow the topography as it is. This is to avoid sudden ascend or descend of the car at design speeds of the road. 2. Drainage (camber) to send water off the road. Pooling of water on the road is dangerous to any car, therefore, the elevation of a road must be righ enough to clear any level of runoff water accumulation especially at the lowest elevation where water usually accumulates. The horizontal profile handles curves which is not a concern to your issue. I supervised a road construction during my NYSC, while the majority of the people of the street were so happy, a few houses realised there houses are in danger and sued to court. There issue is that since new drainage were constructed, this accumulated all the runoff water from the entire street to the premises which was directly on the discharge point. Flood became their daily problem. It is not the governments fault that they built their houses on the discharge area or flood plain.
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Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 9:36am On May 25, 2016 |
lagbaja:..but you and I know the river(bigger drain) has existed before any of the buildings and thus the foundation levels will be higher than that river at high tide,so why not consider the building levels at least follow the one with the lowest level relative to the river? |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 9:40am On May 25, 2016 |
adanny01:your illustration is a bit different,as even natural runoff will occur,with or without the construction of drainage. The highland existed before they built on valleys,thats becomes their fault. Compare with my own illustration is different |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by VictorRomanov: 9:44am On May 25, 2016 |
Nedu2000 There re so many factors in road and drainange design and construction that a layman is ignorant of and cannot know. I'll try to explain. When designing drainages, one of the aim is to have a discharge point. Without a discharge point, water in the drain would not flow. This will breed mosquitoes and cause flooding when there is heavy run off. Flooding would weaken the road base and the road would fail. To achieve flow to a discharge point, the point of discharge should be lower in elevation than other parts of the drain. That is the drainage would have a slope tilting towards the point of discharge. Now a street with residential buildings is to be constructed. And the discharge point of the drains in that street maybe a nearby street, a river or stream or even the drains of a high way. No matter the discharge point, the drains of the street would be higher than the discharge point so that water can flow from the streets to the discharge points. To achieve this, the drain would need to be raised. Its elevation may eventually be higher than the existing building in the area, giving raise to scenario the op is illustrating. But if this is not done, water from the stream, or the high way would discharge into the street causing flood. Its a case of choosing the lesser evil. To avoid this, landlords and would be builders should engage a professional when starting a building project, rather than quacks. These professionals would ensure that the level of their proposed building would be higher than the level of available discharge points, even when the street has not been constructed. So don't entirely blame the engineer or contractor. 1 Like |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by Benoy: 10:28am On May 25, 2016 |
VictorRomanov: Sir, the discharge points (turn-out) you talking about naturally are of low elevation . You don't expect water to flow up, do you?. Natural course of water must be taken into consideration when designing/constructing line drain except you re changing course, and problems like this ll always arise. 1 Like |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by Batlan01: 10:31am On May 25, 2016 |
nairaman66:
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Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by 1kinggy(m): 10:39am On May 25, 2016 |
lagbaja: bros, which journal do you write for. Strictly expert tone. i just hope you didn,t disconnect some readers. |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by adanny01(m): 10:58am On May 25, 2016 |
nedu2000: Building a road drains in a developed street is different from building a road where there are no houses with no drains. The drain accumulates runoff water to a certain spot, usually the discharge point. The problem is that discharge points in someplaces do not have good slope to accomodate high runoff. This causes discharge areas to flood and most times onto the drains and then to the road posing danger to road users. The only solution is to make sure the road level is considerably higher to the ground level at the discharge point. I have other points to make but kinda busy now. |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by adanny01(m): 11:55am On May 25, 2016 |
Benoy: The point he has tried to explain is that people build floor levels of their house within 100-500cm above the discharge area level. Before a street drainage is built, there would have been multiple discharge points created by house owners or naturally. Building a street drainage means collecting all those discharges into one or more as the case maybe. The volume of runoff at the new discharge point would be directly proportional to all the previously existing multi discharge points put together. With the increased volume of runoff, if not handled properly will amount to serious flash floods. The only way to kill a flash flood is to increase slope. So, the higher the road the better protected the road is from flash flood. In fact, it is more dangerous for a house to be at the same level to the road. With the road and house at the same level, both road and house are susceptible to flood. With the road higher than the house, there will be more slope and velocity of runoff water which is easier to control by any house owner. The risk of flooding will be greatly reduced in the owner does his part. If he doesnt, its not just flood, he will worry about, its his house. Ultimately, it is better to have a fast moving body of water coming to your house than a stagnant one (flood). Fast moving water can easily be diverted with drains, while flood is not childs play. Lastly, using the natural course of water is just economical. People build artificial islands. You can totally eliminate a discharge point through underground pipes that can even be made as a network. The cost is the main area of concern. I know Uyo has some underground drains and are building more. Thats because there are discharge points that either have been built up blocking it entirely or had no natural discharge that would create flash lakes. |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by VictorRomanov: 12:36pm On May 25, 2016 |
Benoy:. They are not always on low points. For example a street that discharges into a highway. Except u want all the water from the high way to discharge into the street, u will have to raise the elevation of the street. |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by nedu2000(m): 5:42pm On May 25, 2016 |
VictorRomanov:it's always higher,no one builds below the sea/river level anyways and even if u do it 2metres high,overtime 'settlement occurs,even a house built by julius berger in 1984,will struggle with the same problem! |
Re: Selfish Nature Of Road Contractors In Nigeria(pic And Illustrations) by eazyway212: 9:08pm On Jun 08, 2017 |
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