发明名称 System for underpinning a building
摘要 A pier driving assembly is disclosed which supports the foundation under compression forces. The pier driving assembly includes a driving pier bracket which drives the pier pipes into the ground, a pier head which is placed on the pier pipe after the pipe has been driven to bedrock and the pier driving bracket assembly has been removed, and a loading bracket which gives the final lift to the foundation to make it level. When complete, all that is left in the ground is the pier and the pier head. The pier driving bracket and loading bracket are removed when their use is completed. This assembly allows for easy access to the pier should the building settle again. A modified pier driving assembly includes a pier driving unit, incorporating a pair of hydraulic jacking cylinders, for stabilization of the unit into position when located within the foundation excavation, the unit having a pair of hydraulic driving cylinders, cooperating with a guide block, for driving pier pipe segments into the ground; the unit being removed, and replaced by a pier head, incorporating a pair of lateral brackets, for supporting a pair of hydraulic jacking cylinders, for stabilizing or raising of the foundation wall and footing, when energized, and providing for the locating of a bolt means therein, which when tightened against a bearing plate arranged at the underside of the footing, supports the building foundation and footing thereon, allowing for the removal of the temporarily emplaced hydraulic jacking cylinders. When accomplished, the excavation can be refilled, concealing the supporting bolt means, pipe segments, bearing plate, all underground, and stabilizing the building wall and integral footing.
申请公布号 US5116355(A) 申请公布日期 1992.05.26
申请号 US19910713265 申请日期 1991.06.11
申请人 FREEMAN, III, THOMAS R. 发明人 FREEMAN, III, THOMAS R.
分类号 E02D27/48;E02D35/00 主分类号 E02D27/48
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