摘要
混凝土坝能否长期安全使用,与运行条件有很大关系。但大坝蓄水后,一般都重视水压力的影响,忽视冬季低温的作用。如不注意大坝保温,可使裂缝扩展或产生新的裂缝,有的裂缝甚至危及大坝安全。低温可使大坝变形出现"异常",有时超过历史最大值及监测指标;冰压力能使闸门自动抬起和闸墩产生裂缝。对上述问题在运行中必须加以注意,否则会影响大坝安全运行。
Whether the concrete dams can be used for long period are with important relation to the operation conditions.Nevertheless,after the dams storing the water,generally the importances are attached to the influence of the water pressure,but the functions of low temperatures in winter are neglected.If the heat preservation of the dam is not attended,the cracks will be extended or new cracks will be produced;some cracks even endanger the safety of dam.Low temperatures could make the deformation of the dam emerging 'abnormality',sometimes exceeding the historical maximum value and monitoring index;the ice pressure could make the gate raising automaticaly and make the gate pier producing cracks.These problems mentioned above must be attended in the operation,otherwise safe operation of the dams would be influenced.
出处
《东北电力技术》
2003年第3期6-10,48,共6页
Northeast Electric Power Technology
