是指桩尖（桩底）至承台底的长度。
临界桩长 critical length of pile ; critical pile length
桩长选择 Determination of pile length
长短桩 long-short piles ; length of pile ; long-short-pile ; long-short pile foundation
超长桩 overlength pile
长短桩复合地基 long-short composite piled foundation ; long-short-pile composite ground
超长群桩 super-long pile group
长顶桩 Long dolly ; Dolly long
桩的长度 length of the post
The highlighted problems include: unable to quantitatively analyze the defect degree of pile body, a certain error in estimating pile length caused by wave velocity and too many man-created factors in integrity classifications.
其中以桩体缺陷程度无法定量分析、桩长评价因波速原因而存在一定误差、完整性分类人为因素较多最为突出。
参考来源 - 基桩反射波法测试技术的应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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