CUT AND COVER Meaning and
Definition
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Cut and cover is a construction technique predominantly used in civil engineering and transportation projects. It involves excavating a trench or a pit, constructing the desired structure or facility within it, and finally covering it up with a layer of backfill or earth. This method is commonly employed for the creation of underground infrastructure such as tunnels, subways, or utility lines.
The process of cut and cover begins with the excavation of a trench, which can be of varying depths and widths depending on the project's requirements. Temporary support structures, such as walls or struts, are then installed to prevent the surrounding earth from collapsing. The required structure, such as a tunnel or subway station, is constructed at the base of the trench using various materials such as steel, concrete, or precast elements. Once the structure is complete, the trench is backfilled, and the surface is restored to its original condition.
Cut and cover is often chosen when the construction site permits easy excavation and efficient access to build underground infrastructure. It is a widely used method due to its relative simplicity and cost-effectiveness, as compared to more complex techniques like tunnel boring or immersed tube methods. However, it can cause disruptions to traffic and surrounding activities during the construction phase, as it typically involves street closures or diversion of utility services. The technique's success relies on careful planning, coordination, and mitigation measures to minimize inconveniences to the public.
