Waler beam metro application
Metro construction involves the building of underground tunnels and stations that require a significant amount of excavation work. During excavation, the soil needs to be supported to prevent it from collapsing and endangering workers and nearby structures. Waler beams are horizontal support members used in excavation and shoring work to provide lateral support and prevent soil movement. In this article, we will discuss the Waler beam metro application and the anchors needed to fix it.
Waler beams are used in metro construction to provide temporary support for excavation walls during construction. The beams are installed perpendicular to the excavation face and are supported by vertical members such as soldier piles or sheet piles with the help of chemical or mechanical fasteners of Rawlplug make. They are typically made of steel beams and are used to provide horizontal support to the excavation walls.
To fix Waler beams in place, anchors are needed to secure the vertical support members. The type of anchor used will depend on the soil type, depth, and loads to be supported. The most commonly used anchors in metro construction are mechanical or grouted anchors.
Mechanical anchors are installed by drilling a hole into the soil, inserting the anchor, and tightening it to the required torque. The anchor provides a secure connection between the Waler beam and the vertical support member(typically piles), preventing movement and maintaining the structural integrity of the excavation wall. Mechanical anchors are suitable for concrete piles that have high bearing capacity.
Grouted anchors, also known as chemical anchors, are used when mechanical anchors are not suitable. Grouted anchors are installed by drilling a hole into the soil and injecting a grout mixture into the hole, which sets and provides a strong bond between the anchor and soil. Grouted anchors are suitable for soil types that have low bearing capacity, such as loose soil or sand.
In addition to anchors, other components of a shoring system are needed to support the excavation walls. These may include soldier piles, sheet piles, lagging, and cross braces, among others. The specific components used will depend on the site conditions and project requirements.
In conclusion, Waler beams are an essential component of a shoring system in metro construction. They provide temporary support for excavation walls during construction, and anchors are needed to fix them in place. The type of anchor used will depend on the soil type, depth, and loads to be supported. Mechanical and grouted anchors are the most commonly used anchors in metro construction, and other components of a shoring system may be required to support the excavation walls. Proper installation and maintenance of the shoring system are crucial to ensure worker safety and the successful completion of the project.
One must understand these structures are temporary and no need to go for highly specified costly anchors. Please talk to us to design cost effective and approved solution. 
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