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环形无粘结预应力技术是近 1 0a逐步发展并加以推广应用的新技术 .结合日处理污水能力 4× 1 0 5 t的大型污水处理工程中污水初沉池和二沉池的预应力混凝土施工 ,通过三维混凝土有限元分析确定了池壁环向预应力钢绞线的张拉方法 .开展了环形无粘结预应力钢绞线孔道摩擦系数和偏差系数的现场试验研究 ,对钢绞线的张拉理论伸长值与实测值进行了对比分析 .同时对沉淀池池壁孔口预应力钢绞线的布置及钢绞线的锚固防腐等工程经验进行了分析总结 .对同类结构的理论研究和工程实践具有重要的参考价值
The ring-shaped unbonded prestressed technology is a new technology that has been gradually developed and applied in the past 10 years. The prestressed concrete of the primary sedimentation basin and the second settling basin in the large-scale sewage treatment project combining the daily sewage treatment capacity of 4×10 5 t The three-dimensional concrete finite element analysis was used to determine the tensioning method of the circular prestressed steel strand in the pool wall. Field tests on the friction coefficient and deviation coefficient of the annular unbonded prestressed steel strand were carried out on the steel strand. The stretching values of the tensile theory are compared with the measured ones. At the same time, the engineering experience of prestressing steel strands and anti-corrosion of steel strands in the sedimentation tank wall openings are analyzed and summarized. The theory of similar structures is summarized. Research and engineering practice have important reference value