Messel shield device and open pit construction method using it

摘要

PROBLEM TO BE SOLVED: To prevent a long period of burial work of an underground buried structure due to the Messel shield device moving in a direction different from the plan, and to bury the underground buried structure without destroying a water pipe or the like by the front Messel. We will provide a Messel shield device that can ensure the safety of construction and an open pit construction method using it. When a front Messel 40 is moved forward while penetrating a ground, a pressing force for pressing the front Messel forward is measured by a hydraulic sensor, and the pressing force measured by the hydraulic sensor is measured. When the pressing force exceeds a predetermined pressure, the forward movement drive of the front sensor is stopped. Therefore, even if a large rock exists in the front direction of the front sensor, the sensor shield device 1 by colliding with the large rock or the like. It is possible to prevent bending in the direction of travel. [Selection diagram] FIG. 5