When many people travel across bridges, they ask themselves this question, "how was this bridge built on top of this water mass?" Bridges connect two lands separated with a water body. There are many methods used by engineers to construct bridges on top of water.

1: In deep seas, rivers and oceans, engineers use the cofferdam technique. Here, engineers build a structure like a wall that encloses a certain area in the water and they continuously pump water out. A free space is left and the foundation is first built and the rest of the construction follows.

2: Engineers also use a technique called Case Drilling. Here, engineers use a tight chamber that keeps water away with the help of air pressure. Engineers then fit a sealed tube inside the chamber. They put a long drill inside the tube and start drilling. Water in the sealed tube is pumped out and a case inserted into the hole. A strong frame is created when the inserted case is drilled inside to give extra support. The frame is then put concrete inside and that is how bridge pillars and foundations are built.

Chelsea fans have got a news they have all feared for since the international football break began this week.

That is fear of injury to any of their players.

It is obvious that the back line and goal keeping department have been chaotic for Chelsea over the last past season and even now.

Now they have been thrown into a worry with report stating that the new goal keeper Edouard Mendy have injured his thigh while training with the Senegalese national team.

Edouard Mendy picked up an injury on international duty, and will miss both of Senegal’s games at the very least the report added.

He will be flying to Cobham for further examinations.

The Chelsea fans have been reacting to that news on Instagram expressing deep concerns.

Now this will bring Kepa Arizabalaga into the goal keeping frame depending on the extend of the injury to Mendy

We wish Mendy a quick recovery and will keep updating you on the latest outcome of that injury