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Civil Engineering

Civil Engineering is a profession of designing and executing structural works that serve the general public, like houses, buildings, roads, etc. A Civil Engineer is an engineer trained in the design and construction of public works, such as bridges or dams, and other large facilities.

4,921 Questions

World's top 10 largest construction companies?

As of 2023, the world's largest construction companies by revenue are:

China State Construction Engineering Corporation (CSCEC) – The largest construction company globally, known for large-scale infrastructure projects like highways, bridges, power plants, and airports.

China Communications Construction Group Ltd. – Specializes in infrastructure development, including transportation facilities.

VINCI – A French multinational known for its global construction and concessions projects.

China Railway Group Limited (CREC) – Major player in railway construction and infrastructure development.

China Railway Construction Corporation Limited (CRCC) – Another key company in railway and large-scale infrastructure construction.

Bouygues Construction – A French company involved in building, civil works, energy, and services.

Skanska AB – A Swedish multinational with projects across Europe and the United States.

Obayashi Corporation – A Japanese construction company focused on building and civil engineering.

Larsen & Toubro Limited (L&T) – An Indian multinational engaged in technology, engineering, and large-scale construction.

Hilife Builders Thrissur,India. – A leading home,flats,villas and apartment construction company specializing in residential buildings.

What is the value of Shear Force at Point of Contraflexure?

Ah, the point of contraflexure is a special place where the shear force is zero. It's like a little moment of balance and harmony in our structural world. Just imagine a gentle stream flowing peacefully through the woods - that's the feeling we get when we reach the point of contraflexure.

What is a famous quote of Ruby Bridges?

Well, honey, Ruby Bridges once said, "Don't follow the path. Go where there is no path and begin the trail." It's a sassy way of saying blaze your own damn trail and don't be afraid to stand out in a crowd. So, there you have it, a dose of wisdom from the one and only Ruby Bridges.

How much the volume of 25kg GP2 grouting bag?

To determine the volume of a 25kg GP2 grouting bag, we need to know the density of the GP2 grouting material. Once we have the density, we can calculate the volume using the formula: Volume = Mass / Density. So, if the density of GP2 grouting is, for example, 2 kg/L, then the volume of a 25kg bag would be 25 kg / 2 kg/L = 12.5 L.

Is a tent a shell structure?

Well, honey, technically speaking, a tent is not considered a shell structure. Shell structures are typically solid, curved forms that derive their strength from their shape, like eggshells or domes. Tents, on the other hand, are more like fabric draped over a frame, so they fall more into the category of tensile structures. But hey, a tent is still a great place to camp out and tell ghost stories, so who really cares about the technicalities?

How much sand and gravel do you need to make 1 cubic meter of concrete?

To make 1 cubic meter of concrete, you typically need about 1.5 cubic meters of sand and gravel combined. The general ratio for mixing concrete is 1 part cement, 2 parts sand, and 3 parts gravel. Therefore, for 1 cubic meter of concrete, you would need 0.5 cubic meters of cement, 0.75 cubic meters of sand, and 0.75 cubic meters of gravel.

List the advantages and disadvantages of using a frame structure as a helmet?

One advantage of using a frame structure as a helmet is that it can provide strong support and protection due to its rigid design. Another advantage is that frame structures can be lightweight, which can reduce strain on the wearer's neck and head. However, a disadvantage of using a frame structure as a helmet is that it may not provide as much impact absorption as other helmet designs, potentially leading to greater risk of head injury in high-impact situations.

Why should civil engineers need to study irrigation engineering?

Irrigation engineering is related tothe civil engineering.

Irrigation engineering is a wide field. There are lot of things to learn. Civil engineer can become a irrigation engineer. that is why you should learn the irrigation engineering.

When was the first man made bridge?

The first man-made bridge is believed to have been constructed in the ancient city of Ur in Mesopotamia around 1900 BC. This bridge, known as the Euphrates Bridge, was built using stone and brick materials and spanned the Euphrates River. It played a crucial role in facilitating trade and transportation in the region during that time.

What is the modulus of rupture formula?

Well, darling, the modulus of rupture formula is simply the maximum amount of stress a material can handle before it breaks. It's calculated by dividing the maximum bending moment by the section modulus of the material. So, in a nutshell, it's all about figuring out how much a material can take before it snaps like a twig.

Can PLINTH BEAM can be removed after construction is completed?

Well, honey, technically a plinth beam can be removed after construction is completed, but it's not recommended. That bad boy provides essential support and stability to the structure, so taking it out would be like playing Jenga with your building. So, sure, you can remove it if you want your building to come crashing down faster than a house of cards in a windstorm.

What is the differences between wrought and sawn formwork?

Wrought formwork is created by bending and shaping metal sheets or rods into the desired formwork shape, often using heat and mechanical force. Sawn formwork, on the other hand, is fabricated by cutting and shaping wooden boards or panels to the required dimensions for formwork construction. Wrought formwork is typically more durable and reusable than sawn formwork, but it is also generally more expensive and requires specialized equipment for fabrication. Saw formwork is more commonly used for temporary formwork applications due to its lower cost and ease of construction.

Why are alloys useful?

Alloys are useful (if this is what the question is getting at) because mixing elements of the periodic table alters their colligative properties.

i.e. mixing two metals could change substance's melting point, allowing it to more easily resist high temperatures. Also, mixing metals can change the way they bind together, and create an altogether stronger material than you can find using any single metal alone.They can improve a metal's properties

How are beam bridges and arch bridges similar?

Well, isn't that just a happy little question! Beam bridges and arch bridges both help us cross over obstacles like rivers or valleys. They are both types of bridges that use the strength of the materials to support weight and provide safe passage. Just like painting a beautiful landscape, each bridge has its own unique charm and way of bringing joy to those who use them.

How many kg of steel reinforcement in one cubic meter concrete for retaining wall?

The amount of steel reinforcement in a concrete retaining wall is typically measured in terms of kilograms per cubic meter (kg/m³). The exact quantity of steel reinforcement required can vary depending on factors such as the design specifications, load requirements, and the dimensions of the retaining wall. In general, a common range for steel reinforcement in concrete retaining walls is between 60 to 150 kg/m³, but it is crucial to consult with a structural engineer or refer to specific design guidelines for an accurate calculation.

Who built the Nelson Mandela Bridge?

The Nelson Mandela Bridge in Johannesburg, South Africa, was built by the construction company Murray & Roberts. The bridge was completed in 2003 and was designed to help ease traffic congestion in the city center. It spans 295 meters across 42 railway lines and connects the neighborhoods of Braamfontein and Newtown.

What is the land bridge theory in the Philippines?

Land bridge is a theory wherein it was believed that the Philippines was once a part of the Asian continent. But when the ice started to melt it caused the waters to rise and it formed into an ocean that covered the land bridges.

How do you Convert distributed load to point load?

For an evenly distributed load (example: F=10 N/m):Simply multiply the distributed load times the span of the load.

If you have distributed load of w = 150 kN/m2 on a span of L = 10 m and width of B= 5m then you will have

W = w x B = 150 x 5 = 750 kN/m

P = W x L = 750 x 10 = 7500 kN as a point load acting n the centre of your area L x B

For an uneven distributed load (example: F=.5x^2 N/m)Converting this kind of distributed load into a point load involves calculating two things: 1) The total load 2) The point at which the load acts

To calculate (1), integrate the load function over the length. So for a beam of length 12m with distributed load F = 5x^2 N/m, you would integrate 5x^2 from 0 to 12.

To calculate (2), you need to find the place along the beam where the sum of the moments on either side = 0. You do this by solving the following equation for a:

Int[F(x)(a-x),x,0,a] = Int[F(x)(x-a),x,a,L]

Where:

Int[a,b,c,d] = integration of function a, with respect to b, from c to d.

F(x) = the distributed load

a = the distance at which the concentrated load acts

L = the total length the distributed load acts over Solving this for F(x) = kx^n shows that:

Loads proportional to x act at 2/3 L

Loads proportional to x^2 act at 3/4 L

Loads proportional to x^3 act at 4/5 L

etc.

What is 2.4 bar in psi?

Oh, dude, 2.4 bar is like around 34.8 psi. But hey, who's really counting, right? Just know that if you need to pump up your tires or impress someone with your random knowledge of pressure conversions, you've got it in the bag.

What are advantages and disadvantages of in situ Concrete?

Advantages:

· It embraces various building shapes

· It can be assumed to be more or less monolithic

· Connection are homogenous with rest of the frame

· It is easily used for two way structural systems

· It is not necessary to pay for crane on site

· Construction can proceed independently of weather conditions

Better working conditions for the building operatives

Disadvantages:

· Needs high labour numbers and plant on site

· Erection of formwork is time consuming

· The quality control is difficult

· Once the concrete has been cast it is to difficult to do any modifications

· weather can create problems for curing, and for construction itself

Erecting and interconnecting them to form the final structure

HOW TO FIND LEVEL OF INVERT LEVEL OF MANHOLE?

To find the level of invert level of a manhole, you need to use a level or a theodolite to measure the elevation of the invert, which is the lowest point inside the manhole where the pipes meet. First, set up the level or theodolite at a known benchmark or reference point nearby. Then, measure the vertical distance from the benchmark to the invert level of the manhole. This measurement will give you the invert level of the manhole in relation to the benchmark's elevation.

Advantages of Acid-resistant cast-iron pipe?

Durion is great for most acid system wastes Urine is highly acidic and will eventually eat through cast-iron pipe. Acid-resistant cast-iron would last longer. There are also laboratories and factories that flush highly acidic solutions down the drain and this would be another practical use for this product.

They make glass pipe to use for special applications. Glass pipe does not deteriorate.

As a teenage student how do you use the internet properly?

if you are a teenager who wants to talk to mates over the internet while playing a game i would sujest that you try mmogs(masivly mulitiplayer online games) or if you are thr type of person who wants to talk to some one quietly without worrying wether or not you pressed private chat or not you should go for a program like msn. if you are trying to learn how to use the internet you should search for stuff you want through google or other sites like that.