| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a problem of increased amounts of waste generated when the whole of a mortar concrete spray layer on a slope surface of the natural ground is demolished, a problem of increased costs of disposal of the waste, and a problem of large influence of the disposal on an environment, the spray layer being deteriorated due to formation of voids between an internal surface of the spray layer and the natural ground surface by receiving radiant heat of the sunlight, according to the lapse of time and depending on climatic conditions, thereby causing a collapsing accident, while taking into consideration that the voids are not always formed between the internal surface of the spray layer and the slope surface of the natural ground when new mortar concrete spraying takes place over the entire spray surface after demolishing the existing spray layer. SOLUTION: There is provided a method for repairing the existing mortar concrete spray surface on the slope surface, according to which a plurality of breaks (3) are vertically formed in the existing spray layer (2) of the natural ground slope surface (1) from a slope top to a slope bottom at predetermined intervals (W), in order to inspect the deterioration of the spray layer, as well as to form grooves (4). Then, longitudinal beams (5) having an inverted projecting shape are formed in the grooves according to spray grating crib works, and then transverse beam works are arranged between the adjacent spray longitudinal beams, whereby inverted projecting transverse beams (6) or green pocket works (7) are formed.
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