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针对某堆石坝坝顶通车对大坝造成的影响问题,对加固后的大坝进行坝体通车荷载作用下的动力响应分析,研究了坝体在最危险水位组合下,不同车重、不同车速的多车辆荷载作用下的动拉应力、动压应力、动剪应力以及动荷载引起的永久变形的分布及变化规律,并根据动应力计算结果,建立了车重、车速与动力响应之间的关系。结果表明,随着车重的增加,灌浆区动主拉应力呈线性增长趋势,且随着车速的增加,灌浆区动主拉应力也呈线性增长趋势。结合灌浆条件的抗拉强度,根据拟合关系,反算得出允许通车的最大车重和最大车速为4.13t和24.44km/h,考虑安全裕度,建议坝顶通车限制车重和限制车速为3.44t、20km/h。
In view of the impact of a dam on the dam due to the opening of a dam, the dynamic response of the dam after reinforcement to the dam is analyzed. The dynamic response of the dam under the most dangerous water level is studied. The dynamic stress, the dynamic shear stress and the permanent deformation caused by the dynamic load under the multi-vehicle speed are analyzed. According to the results of dynamic stress calculation, the relationship between the vehicle weight, the vehicle speed and the dynamic response is established Relationship. The results show that with the increase of vehicle weight, the dynamic principal tensile stress of grouting zone shows a linear increase trend, and with the increase of vehicle speed, the dynamic principal tensile stress of grouting zone also increases linearly. According to the tensile strength of the grouting conditions, the maximum allowable vehicle weight and the maximum speed of 4.13t and 24.44km / h are obtained by inverse calculation. Considering the safety margin, it is suggested that the maximum vehicle weight and speed limit should be 3.44t, 20km / h.