THE UPPER CONTAMINATED GROUNDWATER FOR PREVENTING INFLOW AND APPARATUS AND METHOD FOR PREVENTING THE SHIELD SECTION

摘要

The present invention upper section preventing contaminated groundwater ingress protection and shielding devices and methods on relates to, even if the inflation tube and the advantage of the compression tube cause damage, such as expansion of the inflation tube shield tube by its own functioning and can be shielded even if the compression tube as shown in the bottom of the casing is not in contact with the bottom hole drilling function to be used to secure a shield to prevent influx of ground water contaminated upper layer is capable of blocking period as well as to the intermediate digging position ball. Contaminated ground water inlet section and the upper layer prevents the shield for preventing the compression tube that is installed in the peripheral portion of the casing that is installed in the drilling hole (1) on the ground and compressed so that the close contact with the ball gongbyeok of the excavation by an external force, according to the present invention ( 20); And a spring to seal the top and bottom of the compression tube in close contact around the tube in the compressed gongbyeok of the excavation hole; Release means for releasing the retaining spring so that the fixed contact and the elastic force of the compression tube of the drilling hole in gongbyeok generate the compressed condition of the tube in opposition to the elastic force of the elastic force of close contact of the drilling gongbyeok ball (40) is configured to include, is characterized in that the installation with more than one on the casing. ;