under water pp.pptx construction techniques

Underwater construction, often referred to as underwater engineering or subsea engineering, involves various techniques designed to facilitate the building and maintenance of structures beneath the water's surface. Here are some key methods and technologies used in underwater construction:

1. **Cofferdams**: A cofferdam is a temporary enclosure built within or across a body of water that is pumped dry to create a work environment where the construction can be carried out in the dry. Cofferdams are commonly used for bridge piers and other support structures.

2. **Caissons**: These are watertight structures used in underwater construction that are built above water or in place and then sunk to the required depth. Once in position, the water is pumped out to provide a dry work environment. This method is typically used for the construction of bridge foundations and other underwater structures.

3. **Diving and Remote Operated Vehicles (ROVs)**: Divers play a crucial role in underwater construction, performing tasks such as welding, cutting, inspection, and installation. For deeper or more hazardous environments, remotely operated vehicles are used to perform a variety of tasks that are too dangerous or impractical for human divers.

4. **Underwater Welding and Cutting**: These are critical skills in underwater construction. Specialized techniques such as hyperbaric welding (done inside a chamber filled with a pressurized gas mixture) and wet welding (directly in the water) are employed depending on the nature and requirement of the project.

5. **Grouting and Concreting**: Underwater concrete placementUnderwater construction, often referred to as underwater engineering or subsea engineering, involves various techniques designed to facilitate the building and maintenance of structures beneath the water's surface. Here are some key methods and technologies used in underwater construction:

1. **Cofferdams**: A cofferdam is a temporary enclosure built within or across a body of water that is pumped dry to create a work environment where the construction can be carried out in the dry. Cofferdams are commonly used for bridge piers and other support structures.

2. **Caissons**: These are watertight structures used in underwater construction that are built above water or in place and then sunk to the required depth. Once in position, the water is pumped out to provide a dry work environment. This method is typically used for the construction of bridge foundations and other underwater structures.

3. **Diving and Remote Operated Vehicles (ROVs)**: Divers play a crucial role in underwater construction, performing tasks such as welding, cutting, inspection, and installation. For deeper or more hazardous environments, remotely operated vehicles are used to perform a variety of tasks that are too dangerous or impractical for human divers.

4. **Underwater Welding and Cutting**: These are critical skills in underwater construction. Specialized techniques such

1. - Taskin.C -1WS20AT017 UNDER WATER CONSTRUCTION

2. Introduction Underwater construction plays a crucial role in building infrastructure beneath the surface of the water. However, it presents unique challenges such as extreme pressure, limited visibility, and the need for specialized equipment. In this presentation, we will explore the importance of underwater construction and the cutting-edge technologies used to overcome these challenges and facilitate these remarkable feats of engineering.

3. Underwater Construction

4. UNDER WATER CONSTRUCTION TECHNIQUE WET CONSTRUCTION AND DRY CONSTRUCTION Explore the fascinating world of underwater construction as we delve into the equipment and methods used by divers underwater. From advanced diving suits to cutting-edge technology, we will uncover the secrets of this remarkable field. Underwater Construction

5. Submersibles Exploring the use of underwater remotely operated vehicles and other advanced technologies, we can unlock the potential of underwater construction. By harnessing submersibles, we are able to dive deep into the ocean's depths and construct incredible structures with precision and efficiency. Let us dive into the world of underwater construction and discover the future of engineering beneath the waves.

6. Underwater Construction Techniques and applications in underwater welding Cutting-edge technologies used in building offshore structures Innovative methods for constructing underwater tunnels Underwater Welding Subsea Tunneling Offshore Platform Installation

7. Underwater Drilling ROVs and drilling systems used for underwater drilling operations Extreme depths, environmental impact, and advanced safety measures Dynamic positioning, riserless drilling, and managed pressure drilling Subsea Technologies Methods and Techniques Challenges and Solutions

8. The right mix of materials is essential for durability and strength. Specialized treatments to ensure proper hydration and prevent damage. Techniques for precise positioning and consolidation of concrete underwater. Innovative methods to move concrete from the surface to the construction site. Aggregates and mix design Transportation and pumping Placement and compaction Curing and protection

9. Underwater Surveying Sonar Technology Utilizes sound waves to detect objects underwater Acoustic Imaging Provides high-resolution images of underwater structures

10. Underwater Construction Tech