螺杆灌注桩空钻孔地质核查施工关键技术分析

打开文本图片集

中图分类号： TU753.6+5 文献标志码：A文章编号：1001-5922（2026）03-0847-05

Analysis on key construction technologies for geological verification of dry drilling hole of screw cast-in-place pile

YIN Shixiang

（China Railway First Group Railway Construction Co.，Ltd.，Xianyang 712OOo，Shaanxi China）

Abstract：Aiming at the problems of uneven rock penetration at the pile bottomand substandard pile body quality in theconstruction ofscrew cast-in-place piles，the“keyconstruction technology for geological verification of drydrilling hole of screwcast-in-place piles”is proposed.Byconducting trial pile drydriling before construction，the geological conditions of drydriling holesare detailedly verified with geological endoscopes，and therock penetration situationat the pile botom is accuratelydetermined through the comprehensive analysis of parameters such as drilling current，drilling time，drilling length and winch driling speed combined with geological slag samples，so as to dynamicalyoptimizethe pile length and pileposition layout and ensure the preliminary control of theconstruction quality of screw piles.Verified by theapplication in multiple projects，this technology hassignificantly improved the constructionqualityof pile foundations，reduced construction risks，provided efective technical support forthe construction of screw piles under complex geological conditions，and has extensive popularization value.

Key words：screw cast-in-place pile；dry driling hole;geological endoscope ;dynamic optimization

螺杆灌注桩因适应性强、造价低、施工高效而广泛应用，但在地质复杂或岩层不均匀、地下水位高的场地，常出现桩底悬空、承载力不足等问题，依赖有限勘察易致风险。（剩余5714字）