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一、概述某工程桩型为高强预应力管桩PHC-500 AB 100-8,9,管桩以强风化岩为桩端持力层,桩长17m,桩径500mm,单桩竖向承载力特征值为1400kN。管桩施工时以压力值与桩长双控,施工终止时的桩机压力不得小于单桩承载力特征值。二、施工工艺1.桩机选择及场地平整根据单桩承载力和工程经验选择DTZ818型号液压静力压桩机,最大起重量20t,额定压桩力8180kN。该工程基础为独立基础,桩顶标高高于现场自然土标高。为能使静压桩机正常行走和压桩,必须进
First, an overview of a pile of high-strength prestressed pipe pile PHC-500 AB 100-8,9, pipe pile to strong weathered rock pile bearing layer, pile length 17m, pile diameter 500mm, single pile vertical bearing capacity Characteristic value is 1400kN. Pile pressure during construction and pile length control, pile construction at the end of the pile pressure shall not be less than the characteristic value of single pile bearing capacity. Second, the construction process 1 pile machine selection and site formation According to the single pile bearing capacity and engineering experience choose DTZ818 model hydraulic static pile driver, the maximum lifting capacity of 20t, rated pile pressure 8180kN. The foundation of the project is an independent foundation, and the elevation of pile top is higher than the natural elevation of the site. In order to be able to make static pressure piles normal walking and piling, must enter