The horizontal directional drilling (PHD) is a minimally invasive excavation technique that allows to install subway infrastructures without the need to open large trenches on the surface. This method uses specialized drilling equipment that creates a narrow tunnel following a previously established trajectory thanks to advanced navigation and real-time control systems.
The process begins with a detailed geotechnical and topographical study of the terrain, which allows defining the optimal route and foreseeing obstacles in the subsoil. Once planned, a pilot drilling is carried out to establish the exact route. During this phase, the boring machine is guided by sensors that allow the direction to be adjusted and the trajectory to be maintained accurate. The pilot tunnel is then widened, the necessary conduit or pipe is installed and, in many cases, the hole is backfilled or sealed to ensure the stability of the system.
The precision and control offered by PHD makes it possible to bypass obstacles such as roads, rivers or existing infrastructure without disturbing the surface, significantly reducing community disruption and restoration costs. This technology is especially useful for the installation of water, sewage, gas and telecommunications networks, as it adapts to both urban and rural environments. In addition, by optimizing the process and minimizing surface intervention, construction times are shortened and operating costs are reduced, making PHD an efficient and sustainable solution for critical infrastructure projects.
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