发明名称 |
METHOD AND APPARATUS FOR CREATING RAMMED AGGREGATE PIERS USING A HOLLOW MANDREL WITH UPWARD FLOW RESTRICTORS |
摘要 |
A system and method for installing aggregate piers is provided. A cylindrical hollow mandrel is driven to a desired depth. Aggregate is fed through the mandrel in steps. The mandrel is raised and driven to tamp the aggregate. Physical members in a tamping head of the mandrel allow aggregate to remain in a cavity formed by the mandrel, and prevent aggregate from entering the mandrel during driving. |
申请公布号 |
KR20090122963(A) |
申请公布日期 |
2009.12.01 |
申请号 |
KR20097019755 |
申请日期 |
2008.02.22 |
申请人 |
GEOPIER FOUNDATION COMPANY, INC. |
发明人 |
WISSMANN KORD J.;METCALFE BRIAN |
分类号 |
E02D3/12;E02D3/08;E02D5/34;E02D5/62 |
主分类号 |
E02D3/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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