Investigation and analysis of pavement crack on dam crest of Fosi Reservoir
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Abstract:
On the basis of general survey on the cracking situation at the crest of the Fosi Reservoir dam, a specific study on the cracks was conducted using the test boring and grouting methods. T he cause of cracks on the dam crest of the Fosi Reservoir was analyzed. The results suggested that (1) the cracks at the crest do not extend to the underlayer of the original gravel road, i. e. , no influence on the core wall, which indicates that the cracks on the concrete pavement are not caused by the non2uniform settlement between the core wall and dam shell; ( 2) T he non 2uniform distribution of the gravel layer material of the concrete road is the primary cause of the cracks, and the higher loading from the vehicles than the design loading of the road is the sec 2 ondary cause. M eanwhile, due to the existence of wave walls in the upstream of the crest, vehicles tend to move towards the downstream side, leading to the non 2uniform cracks on the dam crest; and ( 3) the cracks at the dam crest need to be fixed, the number of public vehicles needs to be limited, and more monitoring and perambulatory inspection are proposed to prevent the crack propagation.
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