Control network analysis of the dam "Wióry"

• Autorzy: Walo J. , Szpunar R. , Woźniak M.
• Konferencja: Current problems of engineering surveying / Proceedings of the 8th Scientific Technical Conference (VIII ; 30-31.03. 2007 ; Warsaw-Białobrzegi, Poland)
• Języki publikacji: EN

Abstrakty

EN

The obtained results of the test measurements in the control network of the dam Wióry show that combined usage of length measurements and GPS observations enables to obtain high accuracy and reliability in defining point coordinates. The real determination accuracy of checkpoint displacements in this type of networks is at the level of (plus minus) 2-3mm. However, it should be added that in small networks covering an area up to 1 km in radius, classical measurements (most of all, length measurements) enable to obtain higher accuracies in determining point coordinates, obviously on condition that the net structure is well-designed and length measurement is possible. Having analyzed the obtained results, one can also formulate the following conclusions: - the assumed structure of a modified test network shows effective accuracy both for EDM measurements and GPS observations, - satellite measurements enable combined and direct observation of points between which there is no sight line. It is especially important in the case of reference points which are usually located around the monitored object, and it is rarely possible to link them by means of classical measurements; - GPS measurements make it possible to check the monitored network independently, at least limiting the incidence of major and systematic errors in processing the results and defining displacement values; so GPS observations may, in the case of small control networks, be treated as control measurements made periodically (e.g. every year); - accuracy assessment made for TDA5005 tachymeter observations even in the case of considerable target inclinations, made by means of standard reflectors, attested reflexive foil and CCR fulfills monitoring requirements of specific point (targets), enabling to obtain an accuracy of the (plus minus) 0.5 mm range in relation to reference points; - linear measurements in the test network of Wiory, made by means of a TDA5005 tachymeter and high precision reflectors can be accomplished within 2-3 days.

Słowa kluczowe

EN

earth dam; control network; engineering surveying

PL

zapora ziemna; sieć kontrolna; Wióry; pomiary geodezyjne

• Wydawca: Wydział Geodezji i Kartografii Politechniki Warszawskiej
• Czasopismo: Reports on Geodesy
• Rocznik: 2007
• Tom: z. 1/82
• Strony: 376--380
• Opis fizyczny: Bibliogr. 3 poz., rys., tab., wykr.

Twórcy

autor

Walo J.

autor

Szpunar R.

autor

Woźniak M.

• Warsaw University of Technology, Pl. Politechniki 1, 00-661 Warszawa, Poland, tel. [phone]

Bibliografia

• AXELRAD, P., C. COMP, P. MACDORAN (1994): Use of Signal to Noise Ratio for Multipath Error Correction in GPS Differential Phase Measurements: Metodology and Experimental Results, Proc. 7th International Technical Meeting of the Satellite Division of the Institute of Navigation Salt Lake City, Utah, 20-23 September, 655-666.
• GÓRAL W., J. SZEWCZYK (2004): Zastosowanie technologii GPS w precyzyjnych pomiarach deformacji, Uczelniane Wydawnictwa Naukowo-Dydaktyczne AGH Kraków 2004.
• WALO, J., W.PRÓSZYŃSKI, M.WOŹNIAK, A.PACHUTA, R.SZPUNAR(1999): Sieci hybrydowe w monitorowaniu budowli wodnych na przykładzie EW "Żarnowiec". Materiały z IV konferencji nt. "Problemy automatyzacji w geodezji inżynieryjnej", Warszawa, 15-16 marca 1999r.