PROBLEM TO BE SOLVED: To provide a light reflection device in a computerized construction system of earth construction which is excellent in vibration resistance and impact resistance and suppresses reduction in a work efficiency.;SOLUTION: A light reflection device 20 in a computerized construction system of earth construction: includes six corner cube prisms 1 that receive and reflect a light wave, a storage container 2 that stores and holds the corner cube prism 1, first and second fixing plates 6 and 9 for fixing the storage container 2, and a bolt 5 that fixes the storage container 2 and the first and second fixing plates 6 and 9; and is structured so as to fill a gap formed between a back face 1c and a side face 1b of the corner cube prism 1 and an inner face of the storage container 2 with a cushioning material, to mount first and second impact absorption members 7 and 8 between the first and second fixing plates 6 and 9 and the storage container 2 and mount a third impact absorption member 4 between the bolt 5 and the storage container 2, and to mount a transparent water-repellent protective cover 13 on an outer face of the storage container 2.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2017,JPO&INPIT
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