| 摘要 |
A post-tensioned pile anchor foundation and method therefor creates a void or highly compressible space between a drilled or driven pile anchor surrounding a post-tensioned anchor bolt or tendon and the bottom of a foundation cap. The void or space can be formed by compressible spacers or void forming elements placed between the top of the pile anchor and the concrete cap. As the anchor bolt or tendon is post-tensioned against the cap, the void forming element is compressed or crushed, allowing the pile anchor to be pulled upwardly toward the cap, developing pull out resistance, and the cap to be pulled downwardly against the surrounding soil to provide a secure foundation for a tower or other structure to be supported thereon.
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