Arched bridges with suspension brackets of cables are built over the river Ohta in Saint Petersburg and the river Ishim in Astana (Kazakhstan). Each semi-arch was carried out of separate units from supporting block of the arch tightening. There are given the formulas for calculating the precision of semi-arch jointing depending on the fabrication accuracy and dimensions of its elements, on the shape and size of the arch span. Calculation examples are given for the arch bridge construction over the river Ishim in Astana.
The main types of surveying, made during the construction of cable-stayed bridges in the city of Vladivostok. Among them: the geodetic staked basis, survey work in the construction of piers and installation of anchors to mount guys pole and span, geodetic support for installation, metal core, geodetic monitoring of cable-stayed bridge in the construction process of its construction.
The implementation technique of land measuring at construction of Mariinsky theatre second stage in Saint Petersburg is presented. Basic steps of these works, such as designing, creation and monitoring of supporting geodetic network, land measuring at the establishment of experimental trench, land measuring at substracture construction of the theatre, precipitation and circumferential building careens supervision are investigated in detail.
The Department of Engineering Geodesy of the University of Railway Transport carries out geodesic works on the construction of the cable-stayed bridge across the Neva river in St. Petersburg. Two steel pylons of 124 m height each will hold on the steel cables – cable stays –the span of 670 m length (322 m – the river span and two shore spans of 174 m). The geodetic demarcation network for the bridge construction, including 51 points, was created with the use of electronic total stations and the GPS satellite system. Electronic total stations from "Leica", "Sokkia", "Topcon" with an accuracy of angles measurements of 2-3" and distances (2 + 2·10 -6 S) mm allow with high accuracy to mount the blocks of the pylon and the superstructure. Deformations of pylons and span arising due to the influence of wind and uneven heating by the sun, high requirements to the accuracy of installation of cable fastening devices in the span and pylons required the development of original methods of geodetic works with the use of laser and high-precision devices.
The experience of using SDL30 electronic level during tests of the Trinity Bridge in St. Petersburg conducted in May 2003 is described. The deflections of spans were determined by the results of high-precision geometric leveling. The characteristics of the level used and some test results are given. The use of electronic levels significantly reduced the time of leveling and perform a large amount of work by one team of surveyors. It is proposed to use the electronic level, which allows to speed up significantly the measurement process and get rid of the routine work of processing the results.
