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预应力混凝土圆孔方桩,已广泛应用于码头工程中,对于沿海江河软土地基修建桥梁基础,也是适用的。其优点是:1.采用“空心胶囊”作内模制桩,增大了预应力效果,构件的抗裂性好;2.桩长在38米以内,可按实际情况制成所需的任一长度(长桩系四点吊装),节省了法兰接头材料;3.由于接头少,打桩速度快,桩的垂直度及传力性能好。本桩各截面配筋按常用八根对称布置,计算按《铁路工程技术规范·第二篇桥涵》有关预应力混凝土部分外,并参
Prestressed concrete square hole pile, has been widely used in the dock project, for the construction of soft soil foundation along the Yangtze River River Bridge Foundation, is also applicable. Its advantages are: 1. The use of “hollow capsules” for the inner molded piles, increased pre-stress effect, good crack resistance components; 2. Pile length less than 38 meters, according to the actual situation made of the required A length (long-piled four-point hoisting), saving the flange joint material; 3 due to less joints, piling speed, pile vertical and force transmission performance. The sections of the pile reinforced by eight commonly used symmetrically arranged, according to “Railway Engineering Specifications Part II Bridge” part of the prestressed concrete, and the reference