| 摘要 |
PURPOSE: A descent construction method for an underground structure is provided to construct the underground structure in an accurate location by maintaining in a parallel state regardless of a condition of soil. CONSTITUTION: A descent construction method for an underground structure is as follows. A line is installed by matching a shape and a size of the underground structure, and a front shoe(10) is assembled along the installed line by a steel plate. The underground structure(20) composed of internal and external walls is formed along the assembled front shoe. A plurality of brackets(70) are installed on the inner side surface of the underground structure bottom, and a hydraulic indention device(80) is installed on the bottom side surface of the brackets. Bottom soil in the underground structure is excavated, and supported by operating the hydraulic indentation device. Bottom soil in the front shoe installed in the underground structure is excavated. The underground structure located on the upper part of the hydraulic indentation device is moved and descended in a lower direction by operating the hydraulic indentation device. |
