Method of grouting a pile in a hole involving the optimized frequency of vibration of the grouting material
专利汇可以提供Method of grouting a pile in a hole involving the optimized frequency of vibration of the grouting material专利检索，专利查询，专利分析的服务。并且A pile is placed in an earth borehole which may or may not have a protective casing along at least a portion of its length. A predetermined amount of water is metered into the bottom of the hole in the annulus exterior to the pile and then dry sand is added to the water in the annulus. Alternatively, cement or other grouting materials are added to the hole around the pile. Various means are provided for vibrating either the pile or the external protective casing or the sand and water mixture itself or the other grouting material. To maximize the amplitude of vibration, the frequency of vibration is varied during the grouting process to match the ungrouted length of the pile, either by continuously varying the frequency of vibration or in steps along the length of the pile. The sand and water or other grouting mixture itself can be vibrated by one or more vibrating rods inserted into the mixture or by a multi-fingered sleeve which fits over the pile and into the annulus external to the pile. In some of the embodiments, the vibrated apparatus is removed while vibrating to successively compact the sand and water or other grouting mixture beginning at the bottom of the hole. When using a pipe pile, the bottom of the pipe pile can be plugged during the compaction of the sand and water or other grouting mixture and then removed if necessary. Dry sand is used as a ballast to prevent the pipe pile from floating when using a closed end.，下面是Method of grouting a pile in a hole involving the optimized frequency of vibration of the grouting material专利的具体信息内容。
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