Why You Might Need a Tie-Back Retaining System
Steel is used in almost all modern construction. It’s used to build roads, railways, bridges, and buildings. In fact, of all the steel made in the United States, which in 2018 was 1,751,000 net tons, steel suppliers sold 43% in the construction industry. One area that it’s commonly used, but isn’t necessarily seen, is in tie-back retaining systems, which can be integral to the success of your next project.
What is a Tie-Back Retaining System
Many times, a tie-back retaining system is necessary in construction. A tie-back can be made of a horizontal steel rod or wire, and is installed in rock or soil to provide additional support to a structure, such as a retaining wall. A tie-back retaining system is often used with soldier piles, sheet piles, or tangent and secant walls to create lateral support.
Uses of Tie-Backs
Tie-backs can be installed with rotary drilling equipment and each one can support up to 200,000 pounds. A tie-back retaining system can be used on dams, levees, roadways, and retaining walls, which can eliminate the need to use concrete.
Advantages of Tie-Backs
Besides eliminating the need to use concrete, a tie-back retaining system can be permanent or temporary. This makes them ideal for many different uses. Tie-backs also don’t require any excavation, so they make the job much easier.
Installation of Tie-Backs
Tie-backs are installed through the base of a retaining wall. Rotary drilling equipment is then used to screw the tie-backs securely into place at an angle so that the wall is connected to the soil.
Considerations before Installation
Before a tie-back retaining system can be used, you must consider what type of construction site there will be, what the soil is like, how much weight it will need to support, and how it will be connected to the structure. All of these can make a difference in the type of retaining system you use.
Types of Tie-Backs
There are several different types of tie-backs: earth retention, helical, and soil screw anchors. Earth retention tie-backs secure the soil or rock that has been excavated to create a slope or cut. A retaining wall with sheet piling, soldier piling, or diaphragm walls retain the soil. Helical tie-backs are screwed into the soil until load-bearing earth is found. Then, the anchor is attached to the wall. Soil screw anchors have a central shaft and several helical plates. They are screwed into the soil to the desired length before they are attached to the retaining wall.
Before you start your next construction project, consider whether or not you will need a tie-back retaining system. This versatile system can make your job much safer and easier.