基于长管道的管道环境复杂特点,进行了其长孔道摩阻试验研究,利用标准测力仪结合智能张拉设备,考察了长孔道摩阻试验中张拉力值传递规律,合理的长孔道张拉控制力、初应力和持荷时间的确定,同时运用最小二乘法进行μ、k的计算。研究结果表明:长孔道摩阻试验中张拉力传递到被动端的速度明显慢于短孔道,具有延时性,管道越长、弯曲累计弧度越大,延时越长;对于孔道长度大于90m管道应该增加控制应力的持荷时间来保证有效预应力在孔道内的传递时间,建议由原来的5min增加到8min左右。张拉控制应力、初应力大小应该根据长孔道的摩阻系数进行适当调整以满足复杂管道预应力损失要求。利用最小二乘法确定的μ、k与设计值较接近,表明了管道施工质量较好,达到了设计要求。 Based on the complex characteristics of the pipeline environment of long pipelines, the long-hole frictional resistance test was carried out. By using the standard dynamometer combined with the intelligent tensioning device, the law of tensile force transfer in the long-hole channel friction test was investigated. Control force, initial stress and holding time to determine, at the same time using the least square method μ, k calculation. The results show that the tensile force transmitted to the passive end in the long tunnel friction test is obviously slower than that of the short one, which has the characteristics of time delay. The longer the pipeline, the larger the total curvature of the curve, the longer the delay. For the pipeline whose channel length is longer than 90m, Increasing the holding time of the control stress to ensure the effective pre-stress transfer time in the tunnel, it is proposed to increase from the original 5min to 8min or so. Tension control of stress, the initial stress should be based on the length of the tunnel friction coefficient to be properly adjusted to meet the complex pipeline prestress loss requirements. The least square method to determine μ, k is close to the design value, indicating that the pipeline construction quality is better and meets the design requirements.