| abstract |
The present invention discloses anti-dash forward of one kind and gushes back cover structure and construction method, and the two sides of top beam are respectively equipped with the small pilot tunnel in upper layer；It is connected between top beam and by two lining structure of crown between the small pilot tunnel of top beam and upper layer；The top of two lining structure of crown is fixed with crown end bay and just props up one, crown end bay just branch two.Construction temporary construction vertical shaft and upper layer occasional passage, lower layer's occasional passage；The small pilot tunnel in upper layer is set in the occasional passage of upper layer；Big pipe curtain, tubule curtain are set along set contour line in lower layer's occasional passage.The present invention can avoid depressurizing underground water artificial rainmaking when hidden digging structure is constructed, and destroy water resource, and can realize anhydrous operation when station construction to guarantee safe construction, it can be achieved that the advance support effect of hidden digging structure construction, is effective against the prominent of artesian water and gushes risk. |