浅谈预应力管桩在实践中的若干问题

;桩基础(pilefoundation)的形式有很多,静压薄壁管桩的优越性在于单桩承载力高(highpilecapacity)、施工方便、进度快、噪音低、桩长调整机动性强、单桩耗材和造价低,目前很多地区广泛使用。静压管桩的承载力主要来自管壁与土壤的摩擦力,在施工中通过桩长和压桩力进行双重控制。在施工中,土层异常、挤土效应、场地条件、施工顺序等都是影响压桩质量的重要因素,控制的精髓在于临场应变和不利因素的预见。

Some Questions of the Prestressing Force Pile in Practice

Pile foundation has many forms. With many advantages of high pile capacity, easy working, rapid progress, low noise, flexible adjustment of pile length and low material consumption and cost, the method of static pressed PTC is presently being adopted in many areas. During working, we can control both its length and pile driving pressure for the capacity of static pressed pile mainly coming from the friction force caused by the pile side through the soil, and the factors influencing the quality of pile driving are abnormal soil layer, compacting effect, working area conditions, and working order, etc. It is essential to change with the situation and predict the unfavorable factor.