Abstract: A porewater pressure dissipater is disclosed. In one example, a disclosed dissipater includes aggregate; a cylindrical receptacle for receiving the aggregate; a plate having a top surface and a bottom surface and one or more openings transcending from the top surface to the bottom surface wherein the plate secures and compacts the aggregate in the cylindrical receptacle; and one or more access tubes coupled to the top surface of the plate wherein the one or more access tubes are positioned over the one or more openings thereby forming a passageway to the cylindrical receptacle. The disclosed dissipater allows piles and shafts to be embedded at the optimum depth without concerns of liquefaction.

Abstract: Disclosed herein are a module, system and technique to enhance end bearing stiffness of pile/drilled shafts. In particular, methods, systems and loading modules which account for tip resistance in overall pile/shaft capacity are provided which increase the stiffness of the bearing soil. The techniques utilize a mechanical system to preload the soil under the shaft tip, thus allowing the users to confidently account for the gained resistance at an acceptable level of movement. Each shaft/pile is preloaded during construction to verify its load carrying capability.

Abstract: Disclosed herein are a module, system and technique to enhance end bearing stiffness of pile/drilled shafts. In particular, methods, systems and loading modules which account for tip resistance in overall pile/shaft capacity are provided which increase the stiffness of the bearing soil. The techniques utilize a mechanical system to preload the soil under the shaft tip, thus allowing the users to confidently account for the gained resistance at an acceptable level of movement. Each shaft/pile is preloaded during construction to verify its load carrying capability.

Abstract: A porewater pressure dissipater is disclosed. In one example, a disclosed dissipater includes aggregate; a cylindrical receptacle for receiving the aggregate; a plate having a top surface and a bottom surface and one or more openings transcending from the top surface to the bottom surface wherein the plate secures and compacts the aggregate in the cylindrical receptacle; and one or more access tubes coupled to the top surface of the plate wherein the one or more access tubes are positioned over the one or more openings thereby forming a passageway to the cylindrical receptacle. The disclosed dissipater allows piles and shafts to be embedded at the optimum depth without concerns of liquefaction.