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为了形成符合输电线路杆塔基础抗拔承载特点的载荷试验变形稳定判定标准,提出了维持荷载时位移与时间变化关系模型,结合实测数据分析了变形稳定特性,以及不同变形要求对维持时间、最终变形率的影响,提出了载荷试验维持荷载时变形稳定判定标准。研究表明,三参数黏弹变形稳定模型符合维持荷载时承载变形稳定规律。变形稳定判定标准为形成具有杆塔基础工程特性的抗拔载荷试验方法提供了依据。
In order to form the criterion for the stability of load test in line with the uplift bearing characteristics of transmission tower foundation, a model of the relationship between the displacement and the time variation during load maintenance was proposed. The deformation stability characteristics were analyzed with the measured data and the effect of different deformation requirements on the maintenance time, Rate of impact, put forward the load test to maintain the stability of the load deformation criteria. The research shows that the three-parameter viscoelastic deformation and stability model accords with the stable law of bearing deformation when the load is maintained. Deformation stability criteria for the formation of tower foundation with the engineering characteristics of the pull-pull load test provides the basis.