Geotechnical Engineering<\/a> is a primary branch of Civil Engineering<\/a> concerned with the engineering behavior of earth materials. It utilizes principles of Soil Mechanics<\/a> and Rock Mechanics<\/a> to solve engineering problems related to the earth's crust. According to the American Society of Civil Engineers<\/a>, the field is fundamental for the safety and stability of infrastructure projects such as bridges, tunnels, and skyscrapers.<\/p> The scientific foundation of the discipline was established by Karl Terzaghi<\/a>, who published the first comprehensive work on soil mechanics in the early 20th century. Geotechnical Engineers<\/a> perform site investigations to evaluate Subsurface Conditions<\/a> and determine the physical, mechanical, and chemical properties of soil and rock. This process often involves drilling Boreholes<\/a> and performing In-Situ Testing<\/a>. Global standards and research are often disseminated by the International Society for Soil Mechanics and Geotechnical Engineering<\/a>.<\/p> Key applications within Geotech<\/a> include the design of Shallow Foundations<\/a>, Deep Foundations<\/a>, and Retaining Walls<\/a>. Engineers must also address geological hazards such as Landslides<\/a> and Liquefaction<\/a> during seismic events. Specialized analysis regarding the interaction between soil and structures is documented in publications like the Geotextiles and Geomembranes<\/a> journal, which focuses on synthetic materials used in ground improvement.<\/p>