| 摘要 |
PURPOSE: A pipejacking and propulsion method and apparatus for propulsion based on soft and weak layer soil are provided to restrain the uplift or subsidence of ground to the utmost and to secure the accuracy on ramming a pipeline. CONSTITUTION: The apparatus for propulsion based on soft and weak layer soil comprises a thrust guide pipe(F) for installing a lower footing concrete layer(14), an auxiliary steel pipe(D) connected to the backside of the thrust guide pipe(F) and provided with a built-in directional control device for a thrust guide pipe, a spiral steel pipe(G) installed on the backside of the auxiliary steel pipe(D), a space part(J) for forming a foundation layer by placing gravel concrete(14) on the outer lower part of the auxiliary steel pipe(E) and the spiral steel pipe(G), and an advancer(E) formed on the backside of the spiral steel pipe(G) to move the pipes forward by pressure.
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