Investigation of Deformations of Tower Headframes and Industrial Structures.

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Ippolitov, N.D.
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| 1600年
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Erection of multirope hoist installations involves high-accuracy surveying work when assembling the equipment during the construction of tower headframes and investigation of deformations during the period of operation. It is recommended that ″reverse″ plumbs or zenith-devices be used for the creation of plumb planes along the axis of the mine; that stationary installations of electric-contact hydro-levelling systems be set up for the investigation of the deformations of structures; that relative displacements in the vertical and horizontal planes be determined by means of linear measurements between pairs of reference benchmarks of a special design.
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