On some house -building plants, executive control of the accuracy of the installation of houses on the statistical basis described above was introduced. Repeated checks showed that the accuracy of the accuracy of the installation of the panels of the load -bearing transverse walls increased in Samarkand from 0.31 to 0.7, in Bukhara from 0.43 to 0.7, in Volzhsk from 0.43 to 0.82 k in Kyiv from 0 , 9 to 1.92. A very important factor affecting the accuracy of installation, which has not yet been paid to proper attention, is the error of the transfer of basic axes.0 (in SNiP I-A.4-62 it is not normalized).
As shown above, this error is one of the reasons for the appearance of eccentricites in the inter -story joints of the transverse supporting walls. For Moscow, Moscow Regions, Leningrad and Baku houses, this error is defined indirectly by equation (6). The average square errors calculated by geodesical formulas for the transfer of basic axes for the angle of inclination of a visir axis of 45 ° are compiled for theodolites of the TS (TT-50), T; With one circle for five -story buildings 1.8 mm and for nine -story buildings 2.7 mm, and with two circles – 1 and 1.4 mm, respectively,. The tolerances of this error, equal to running, respectively will be 10.8; 16.2; 6 and 8.4mm. For the anti-aircraft industry, the admission of this error will be 3 mm. At the Voronezh DSK, a thorough vertical visitor is made by the PZL device.
The error of the installation of aircraft panels, measured using a roulette, turned out to be 21.6 mm, and the error,.measured with theodolite, e = 8.2 mm. Analysis of the accuracy of the installation of large -panel houses shows that modern series of large -panel houses do not meet the conditions of complete collectibility. To ensure it, a wide implementation of a number of constructive and technological measures is necessary: the expansion of the gaps in the wells of vertical joints of the external walls; expansion of the gaps in the contact sites of the panels of the internal transverse walls and external end panels in the loggias; expansion from the inside of the compensation zone in horizontal joints of the external walls; molding of the panels of external walls with minus deviations in length and, conversely, eliminating minus deviations in height if they take place (for example, in the Moscow DSK-2); increasing the accuracy of the transfer of basic axes; Introduction of executive control of the accuracy of installation in order to improve the quality of installation work.