摘要:
A high strength shaft, by which wasteful consumption of casing material is reduced, is constructed. After an excavation casing (1) is pressed and driven into the ground and earth inside the driven excavation casing (1) is discharged, an earth-retaining casing (2) is inserted into the excavation casing (1) and a concrete bottom plate (7) is cast in the earth-retaining casing (2), and thereafter, the excavation casing (1) is removed from the ground while a hardening agent (8) is poured into the space between the excavation casing (1) and the earth-retaining casing (2) so that a shaft is constructed.
摘要:
Provided is an underdrain excavation apparatus by which, while an underdrain is excavated in the ground, a hydrophobic material and/or a water-holding material (functional material) can be filled in the underdrain executed in a smooth and reliable manner. In the underdrain excavation apparatus, a soil cutting shank 11 which is vertically held and a bullet-like underdrain borer 12 which is provided on a lower end of the soil cutting shank 11 are pulled in a horizontal direction by a bulldozer 14 to excavate an underdrain 22 in a ground 21, and a functional material supplied via a functional material transport line 13 provided in the soil cutting shank 11 and in the underdrain borer 12 is filled in the underdrain. A gas flow generator generating a gas flow by jetting a high-pressure gas supplied from a high-pressure gas generator into a tubular body is connected with the functional material transport line 13.
摘要:
A high strength shaft, by which wasteful consumption of casing material is reduced, is constructed. After an excavation casing (1) is pressed and driven into the ground and earth inside the driven excavation casing (1) is discharged, an earth-retaining casing (2) is inserted into the excavation casing (1) and a concrete bottom plate (7) is cast in the earth-retaining casing (2), and thereafter, the excavation casing (1) is removed from the ground while a hardening agent (8) is poured into the space between the excavation casing (1) and the earth-retaining casing (2) so that a shaft is constructed.
摘要:
Provided is an underdrain excavation apparatus by which, while an underdrain is excavated in the ground, a hydrophobic material and/or a water-holding material (functional material) can be filled in the underdrain executed in a smooth and reliable manner. In the underdrain excavation apparatus, a soil cutting shank 11 which is vertically held and a bullet-like underdrain borer 12 which is provided on a lower end of the soil cutting shank 11 are pulled in a horizontal direction by a bulldozer 14 to excavate an underdrain 22 in a ground 21, and a functional material supplied via a functional material transport line 13 provided in the soil cutting shank 11 and in the underdrain borer 12 is filled in the underdrain. A gas flow generator generating a gas flow by jetting a high-pressure gas supplied from a high-pressure gas generator into a tubular body is connected with the functional material transport line 13.