Please use this identifier to cite or link to this item: http://localhost:8081/xmlui/handle/123456789/8623
Title: DEVELOPMENT OF A . METHODOLOGY FOR PHOTOGRAMMETRIC MONITORING OF THE SETTLEMENTS AND DEFORMATIONS OF STRUCTURES
Authors: Sarkis, Sonia
Keywords: CIVIL ENGINEERING;PHOTOGRAMMETRIC MONITORING;SETTLEMENTS;DEFORMATIONS
Issue Date: 1995
Abstract: Photogrammetry as a measuring science offers more thanjust a method for the production of topographic maps. There are a number of broad phases of engineering works where photogrammetry has been used as an effective measuring technique, specially in the field of civil engineering such as monitoring the movements (settlements and deformations) of structures, buildings, dams, bridges etc. For monitoring deformations and settlements of structures, several authors in the past have advocated various techniques. A review of these has been done briefly and the merit of each technique has been highlighted in first two chapters. On the basis of this It is seen that a number of approaches are possible to utilize photogrammetry for the measurement of deformations of structures. In this dissertation a study has been undertaken to develop suitable analytical photogrammetric methodology as a part of the system, for monitoring building deformations and settlements. Two analytical methods viz. Space Resection-Intersection and Stereomodel creation on an analytical plotter, have been used to compare the suitability of these for fast and accurate reduction of the data for desired end results. Digital Photogrammetric approach has also been discussed but could not be undertaken due iii .~ ..on availability of a suitable scanner. Data acquisition part, by utilizing the available Rolleiflex cameras (f=40mm), was kept the same for both systems. The Space Resection-Intersection, which is based on collinearity equations, was used to obtain the object coordinates of all targets (fixed and movable). Two sets of results from each pair of negatives, before and after giving predetermined. amount of movements to movable targets, were obtained to evaluate the accuracy of photogrammetric measurements in monitoring the movements. In the second method, stereomodels were created on an analytical plotter (Planicom P-3), sequentially, for the same two pairs of negatives, and the Inner, Relative and Absolute orientation parameters alongwith the residuals of object space coordinates of fixed targets with geodetic ground coordinates of the same, were obtained. A comparison of the results has shown that analytical Space Resection Intersection method gives better results compared to one obtained by creating a stereomodel. Considering other advantages of the first approach_. such as less expensive, off. line work possibility and Independence from an expensive instrument like analytical plotter, the analytical solution has been advocated for the present system.
URI: http://hdl.handle.net/123456789/8623
Other Identifiers: M.Tech
Research Supervisor/ Guide: Tiwari, R. S.
Garg, P. K.
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (Civil Engg)

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