{ "item_title" : "An Introduction to Deep Foundations", "item_author" : [" J. Paul Guyer "], "item_description" : "A deep foundation derives its support from competent strata at significant depths below the surface or, alternatively, has a depth to diameter ratio greater than 4. A deep foundation is used in lieu of a shallow foundation when adequate bearing capacity or tolerable settlements cannot be obtained with a shallow foundation. The term deep foundation includes piles, piers, or caissons, as well as footings or mats set into a deep excavation. This chapter discusses problems of placing footings and mats in deep excavations and design of drilled piers. Drilled piers (or caissons) are simply large-diameter piles, but the design process is somewhat different. An arbitrary distinction between a caisson and pier is that the caisson is 30 inches or more in diameter.", "item_img_path" : "https://covers1.booksamillion.com/covers/bam/1/49/031/336/1490313362_b.jpg", "price_data" : { "retail_price" : "29.00", "online_price" : "29.00", "our_price" : "29.00", "club_price" : "29.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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