大宁水库防渗墙受回填施工影响的现场监测
Water Resources and Hydropower Engineering(2013)
Abstract
选择大宁水库防渗墙受回填施工影响较大的10榀墙体和3个剖面设置监测仪器,对防渗墙随填土施工过程墙体中的混凝土应变、钢筋骨架内力、上墙两侧土压力、下墙顶面土压力及墙体偏斜情况等进行了实时动态自动连续监测,而墙体沉降则采用人工间断性实测。监测结果表明,填土施工引起的墙体应力、应变和内力呈现出下墙大于上墙,而水平位移和沉降则是上墙大于下墙。同时,回填土进度快慢对墙体的作用效果也不同;墙体的应力、应变等在填土完成后逐渐趋于稳定。
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Key words
deformation monitoring,cutoff wall,Daning Reservoir,earth-filling and roller compaction
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