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在工业及民用建筑、港口、桥梁的施工中和一些部门的基建工程中都大力推广采用了灌注桩。我们分析了国内外基础形式和有关技术资料,认为长螺旋钻孔灌注桩基础形式有一定的优越性,它不仅能在常温条件下应用,而且也适用于低温下施工。本文仅就螺旋钻孔机钻杆的转速及土壤在钻杆上的运动过程进行探讨。我们对螺旋钻孔机工作时的工况进行分析,螺旋钻孔机工作装置所产生的切削力大
In the construction of industrial and civil buildings, ports, bridges and infrastructure projects in some departments, the use of cast-in-place piles has been promoted. We have analyzed the basic forms and related technical data at home and abroad, and believe that the form of long spiral bored pile foundation has certain advantages. It can not only be applied under normal temperature conditions, but also applicable to construction at low temperature. This article only discusses the rotational speed of the drill pipe and the movement process of the soil on the drill pipe. We analyzed the working conditions of the screw drilling machine, and the cutting force generated by the working device of the screw drilling machine is large.