Introduction
Diaphragm wall construction is a technique used in the construction of deep foundations for structures like buildings, bridges, and tunnels. It is a popular method because of its ability to create a strong, continuous wall that can withstand high lateral loads. In this blog post, we will discuss the basics of diaphragm wall construction, its advantages, and some applications.
What is Diaphragm Wall Construction?
Diaphragm wall construction is the process of creating a continuous wall by excavating a deep trench and then casting concrete in the trench. The trench is excavated using special equipment like a hydraulic clamshell grab, which is capable of excavating soil to depths of up to 80 meters. Once the trench is excavated, a steel cage is inserted into the trench, and then concrete is poured into the trench using tremie pipes. The concrete is then allowed to set, creating a strong, continuous wall.
Advantages of Diaphragm Wall Construction
Diaphragm wall construction offers several advantages over other methods of deep foundation construction. One of its main advantages is its ability to create a strong, continuous wall that can withstand high lateral loads. This is important in areas where the soil is unstable or where there is a risk of seismic activity. Additionally, diaphragm wall construction can be used in a wide range of soil conditions, including soft and hard soil, clay, and rock.
Another advantage of diaphragm wall construction is its ability to create a watertight wall. This is important in areas where groundwater is present and where structures need to be protected from water damage. The continuous wall created by diaphragm wall construction is highly resistant to water penetration and can help prevent the buildup of hydrostatic pressure.
Diaphragm wall construction is also a relatively fast construction method. Once the trench is excavated, the concrete can be poured relatively quickly, and the wall can be completed in a matter of days. This makes it an attractive option for projects with tight schedules.
Applications of Diaphragm Wall Construction
Diaphragm wall construction is used in a wide range of applications, including:
- Foundation construction for high-rise buildings and bridges.
- Construction of underground tunnels and subways
- Creation of retaining walls for soil stabilization
- Protection of structures from groundwater
One notable application of diaphragm wall construction is in the construction of deep basement structures. In urban areas where space is limited, deep basements are often constructed to provide additional space for parking, storage, or utilities. Diaphragm wall construction is a popular method for constructing these deep basements because it allows for the creation of a strong, watertight wall that can withstand high lateral loads.
Conclusion
Diaphragm wall construction is a highly effective method of creating deep foundations for structures. It offers several advantages over other methods of foundation construction, including its ability to create a strong, continuous wall that can withstand high lateral loads, its watertight properties, and its fast construction time. Diaphragm wall construction is used in a wide range of applications, including foundation construction for high-rise buildings and bridges, construction of underground tunnels and subways, creation of retaining walls for soil stabilization, and protection of structures from groundwater. With its numerous benefits, diaphragm wall construction is a valuable tool in the construction industry.
