Construction
Home/Construction/Page 4Do you need to remove the ads? Become VIP Member
Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. When you join you get additional benefits.
Log in to TheConstructor to ask questions, answer people’s questions, write articles & connect with other people. When you join you get additional benefits.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Mechanism of rotating tower lacated at Dubai?
AdityaBhandakkar
Hi, the rotating tower is designed by an architect David fisher in 2006. It is an 80 storey building which is 420 metres above the ground which can be able to rotate 360 degrees. The concept behind the rotating tower, it has multiple numbers of followers which can independently rotate with a commonRead more
Hi, the rotating tower is designed by an architect David fisher in 2006. It is an 80 storey building which is 420 metres above the ground which can be able to rotate 360 degrees.
The concept behind the rotating tower, it has multiple numbers of followers which can independently rotate with a common axis. The flowers are only attached with access and not with each other. Therefore the whole building can be transformed into various shapes. The original height of the rotating tower is 345 metres.
Initially, the construction of common access at the centre of the building takes place, then all the surrounding floor was should be constructed independently with each other. In this way, the whole building should be constructed and open for public use at the end of 2020.
See lessWhat is the effect of dewatering on the soil.
aviratdhodare
Potential Groundwater Impacts of Dewatering · Contamination Dewatering can cause the advancement of hydraulic gradients that are additionally fundamental for drawing out water towards wells. Dewatering close to a site with a background marked by contamination in groundwater can bring out hydrRead more
Potential Groundwater Impacts of Dewatering
· Contamination
Dewatering can cause the advancement of hydraulic gradients that are additionally fundamental for drawing out water towards wells. Dewatering close to a site with a background marked by contamination in groundwater can bring out hydraulic gradients that can convey the dirtied groundwater towards the dewatering framework and cause contamination. By and large, polluted water requires filtration. To evade this issue, the best technique is to introduce screen dividers and vertically separate regions utilizing bentonite seals.
· Geotechnical Damage
Dewatering can make the ground lose coherence; the result leads to ground settling. If the ground settling is vast, it can harm close by building and structures. When groundwater is removed from the soil, it makes the soil pack and squeeze. It can likewise also caused by small soil & shallow grounds being removed with the groundwater through well.
This effect can be diminished by a better plan and the utilization of good filtration and groundwater treatment that keep the particles from being separated.
· Impacts on Water Features
Things that depend on the water like rivers, lakes, and springs have a cozy relationship with groundwater and are, in this way, influenced by dewatering and groundwater control by prohibition. It is essential to keep in mind that groundwater and water-dependent things have eco-systems and fill in as territories. An unfriendly impact of these water bodies will have a huge -ve effect on the earth.
· Water Resource Depletion
When groundwater is removed for longer periods and in huge amounts for personal or commercial use, it can conceivably bring down groundwater levels and reduce yields. This exhaustion brings about a decrease in significant water assets for other people. An answer to this issue can be an artificial recharge method that infuses release from siphon water back in the ground.
Conclusion
It is crucial to perceive and decrease the effects of dewatering and groundwater control on the earth as dependable residents of the world. We should embrace great construction dewatering treatment system design, examination strategies, and better groundwater remediation innovation to alleviate these issues before it is past the point of no return.
See lessBending of longitudinal main bars in column
Kuldeep Singh
Hi. First of all, it's a common problem. This kind of erratic workmanship often happens and there are ways to correct it although none will guarantee perfection as much as properly aligned coloumns. The site supervisor should have not allowed this to happen in the first place but now there's no choiRead more
Hi.
First of all, it’s a common problem. This kind of erratic workmanship often happens and there are ways to correct it although none will guarantee perfection as much as properly aligned coloumns. The site supervisor should have not allowed this to happen in the first place but now there’s no choice left to him.
Firstly, it is bending moment development you must be worried about more than shear. If not taken care of the eccentricity would have given rise to additional bending moments especially at the critical locations adding up to bending stresses. But, don’t panic. All building codes provide a factor of safety against these things in colomn design though I don’t know the exact number in the Phillipino code. If it’s an eccentricity of a few inches or less than 5%, then you need not worry much and trust the contractor. He must be providing crank bars in the longitudinal reinforcement after bending the bars which is the most common technique. You can see it in the image below.
It would be very costly and also time consuming to replace the entire colomn. Especially, when the floor slab has been constructed it’s nearly impossible. If the eccentricity is large enough, you should get an expert opinion from an experienced engineer by taking him to site. There are other methods apart from crank bar too.
Also, the adjustment regarding crank bars also requires additional processes like drilling, putting additional shear reinforcement which I can’t exactly tell. You must talk to the contractor or engineers regarding that.
Lastly, don’t go willy-nilly with my answer only. It’s there so you get an idea of what’s going on. I haven’t seen the site so I have only limited information. Best would be to have an engineer look at it at the site.
See lessHow to calculate strength of concrete in rebound hammer test
aviratdhodare
The rebound hammer test is a non-destructive test for the strength of concrete for field testing of concrete. As per the Indian code IS: 13311(2)-1992, the rebound hammer test has the following objectives: To determine the compressive strength of the concrete by relating the rebound index and the coRead more
The rebound hammer test is a non-destructive test for the strength of concrete for field testing of concrete.
As per the Indian code IS: 13311(2)-1992, the rebound hammer test has the following objectives:
The instrument can be used on both horizontal and vertical surfaces. The main point to be noted is that the graph had to be read appropriately. These days, the hammer is equipped with a digital scale to make life easier.
The IS: 13311(2)-1992 elaborates the procedure in a more detailed manner, making it easier for even beginners to understand the concept.
The point of impact should be at least 20 mm away from any edge or shape discontinuity. For taking a measurement, the rebound hammer should be held at right angles to the surface of the concrete member.
The apparatus is placed on the spot where the test is desired. The hammer is allowed to drop freely. After it strikes the concrete surface it rebounds back. The raise of the rebound is recorded. This test is repeated at different locations and the rebound value is recorded.
The compressive value of concrete is obtained by doing a cube test of the test cube of the batch of concrete on which the rebound test is conducted. The value of rebound and compressive strength of concrete is compared and the value of compression is adjudged from the values of compression test and rebound values.
Around each point of observation, six readings of rebound indices are taken 2nd average of these readings after deleting outliers as per IS 8900: 1978 becomes the rebound index for the point of observation. ( This outlaying is a calculation based method, can be discussed on one’s interest).
Now, we will calculate comp. Strength from rebound number. There are three positions of taking reading
This is why, there are three graphs in Rebound Number-Compressive Strength graph of Rebound Hammer.
You will have to calculate the strength from the graph as per position of Rebound Hammer.
For Example,
For Vertical Upward position of Hammer
If 15 Rebound number readings are
48,42,43,43,44,44,45,45,45,45,46,47,48,50
, as per IS:8900, Clause 5.1.1(TESTS FOR TWO OR MORE OUTLIERS , AT LEAST ONE OUTLIER AT EACH END), 42 and 50 are Outlaying values.
Removing those, Average Rebound number is 45.27
From the graph( fro Vertical Upward) , Compressive Strength Will be 40.54 Mpa
See lessHow do I do the micro modeling of a masonry wall in STRAND7?
AdityaBhandakkar
STRAND 7 is a software used for finite element analysis(FEA) developed by a strand 7 company. Following are some solvers used for micro modelling in strand 7. Natural frequency Harmonic and spectral response Nonlinear in static Buckling Nonlinear and linear transient heat transfer Nonlinear and lineRead more
STRAND 7 is a software used for finite element analysis(FEA) developed by a strand 7 company.
Following are some solvers used for micro modelling in strand 7.
Refer the official link of STRAND 7 for detailed information and various applications in civil engineering.
See lessWhich is the Most Suitable Method for Valuation of Building?
aviratdhodare
The valuation method is depends on the purpose. An income generating property like hotels, cinemas, theatres etc. shall be valued profit method. For ordinary buildings, the detailed estimation method is considered as most accurate where as cost approach (adopting replacement value considering the deRead more
The valuation method is depends on the purpose. An income generating property like hotels, cinemas, theatres etc. shall be valued profit method. For ordinary buildings, the detailed estimation method is considered as most accurate where as cost approach (adopting replacement value considering the depreciation) is prefered by most of the financial institutions like banks. To calculate the depreciation, there are a few methods like straight line method, Constant Percentage method, Written Down Method etc. In India, Market approach is difficult due to reliable comparables are difficult to find out.
See lessWhat are main differences between masonry and timber buildings?
nikeetasharma
Masonry building : Masonry is the building of structures from individual units, which are often laid in and bound together by mortar. The term masonry can also refer to the units themselves. For masonry construction, the common materials are brick, building stones,etc. Masonry is highly durable formRead more
Masonry building :
Masonry is the building of structures from individual units, which are often laid in and bound together by mortar. The term masonry can also refer to the units themselves. For masonry construction, the common materials are brick, building stones,etc. Masonry is highly durable form of construction.
Benefits of Masonry Buildings :
Timber Buildings ;
Timber construction is a category of framing styles typically characterized by the use of large solid wood panels for wall, floor and roof constrution. It also includes innovative forms of sculptural buildings and non-building structures formed from solid wood panel or framing system.
Benefits of Timber Buildings ;
See less