After the reinforcement and repair of the Shangmaji weir in Wanyao Irrigation District of Jiangshan City in 2014, the results of the repair did not improve much. The surface layer of the weir fell off, these not only affected the drainage function of the weir, but also the appearance was different from what is now advocated “Green ecology” is incompatible. This paper analyzes the causes of damage to this problem, and obtains two solutions: drilling, grouting, vertical paving, and to extend the width of receiving water step. After adopting the research programme, the degree of shedding of pebbles is greatly reduced, and the strength of the weir is significantly increased.
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