- ECOLOGICAL SAFETY OF CONSTRUCTION AND MUNICIPAL FACILITIES
- Influence of Inaccuracies in Engineering-Geological Surveys on the Accuracy of Calculation of a Building
- UDC 624.131.15
Sergey N. CHERNYSHEV, e-mail: 9581148@list.ru
Alexey M. MARTYNOV, e-mail: martynov30am@gmail.com
Moscow State University of Civil Engineering (National Research University), Yaroslavskoe shosse, 26, Moscow 129337, Russian Federation
Abstract. For the first time it is shown that the calculated characteristics of the base geometry, as well as the characteristics of soil properties are of probabilistic nature and therefore can significantly increase the error of the calculated assessment of the building and structure settlement. The inaccuracies in engineering surveys when investigating the foundations of buildings and structures are divided into two groups: the inaccuracy in estimating the numerical values of calculated characteristics of the soils; inaccuracies in determining the position of geological boundaries on the engineering-geological cross-section and, accordingly, in the computational geotechnical model. For the inaccuracies of the second group, which were not previously investigated, the term - geological interpolation inaccuracy - is proposed. The method for determining the geological interpolation inaccuracy and the characteristic inaccuracy value depending on the distance between the wells are presented. The influence of the geological interpolation inaccuracy on the accuracy of the settlement is determined by a digital experiment carried out by the method of layer-wise summation using the formula used in the design calculations. It is shown that the inaccuracies in engineering surveys can distort tensely the results of settlement calculations of structures by tens of percent. In order to improve the accuracy of settlement calculations, changes in the methodology of engineering and geological surveys in terms of setting the depth of technical wells are recommended. In addition, proposals for the adjustment of the sets of rules are given.
Key words: settlement of building, calculated characteristics of soils, soil density, engineering survey inaccuracies, engineering-geological section, geological boundary, engineering-geological drilling. - REFERENCES
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