【摘要】 基于静压桩挤土效应、拔管灌注时的桩土界面性状及其同初灌桩身的相互作用,总结了套管成桩原理。据此综合研究了套管灌注新桩型技术和套管桩尖技术,指出了套管成桩的发展方向,介绍了新出现的自历扩展器(桩尖)发明专利。更多还原

【Abstract】 Based on soil extruding effect of static pressure piles, characters of pile-soil surface when pipe-pulling and grouting and interaction with pile body, authors conclude bushing pile-forming principles. They also study the bushing grouting new pile-shape technology and the bushing pile head technology, point the development direction of the bushing pile-forming method, and state a invention patent, self-run expander(pile head).更多还原