This paper expounds the necessity of monitoring in the construction process of major projects, which are large-span or super-high projects. And the deformation is the most important index of monitoring parameters. In this paper, the principles of several deformation monitoring methods, such as dial indicator, precision level, static level, total station, GNSS and image technology, are introduced respectively. This paper compares the traditional deformation monitoring methods with the new deformation monitoring methods, and analyzes the advantages and existing problems of various deformation monitoring methods. Finally, the new requirements and new monitoring technologies for deformation monitoring were proposed in future engineering construction.
Optical methods have been widely utilized in civil engineering deformation/displacement measuring such as robotic total stations (RTS), image/non-contact measurement et al. However, in the practice of measuring in civil engineering, the installation positions of the measuring points and measuring devices were decided usually from human experience. This paper described an optimization method of deciding the installation position in deformation monitoring of multiple points by robotic total stations as an example. The method of resection and polar coordinate was utilized in deformation monitoring, in which two datum points should be installed in immovable location and measuring system could be installed in movable location. The basic errors from optical measuring system are angle errors and distance errors, which combined the systematic measuring errors, which could be reduced by optimizing the installation of the measuring system. This paper presented methods of evaluating the systematic accuracy-functions of the locations of the measuring system and two datum points, the idea of which is from the error analysis in the geodesy field. Then the systematic accuracy could be optimized by optimization methods such as simplex method. The method could be applied in the deformation measurement by RTS or image/non-contact measurement. In most measuring cases by RTS, the problem is a constrained optimization problem with 9 parameters.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.