the main Laboratory Building monitoring Concrete additives Antifreeze additives Articles Contacts the main Electrotomography The method of electrical resistance is based on the study of the specific electrical resistance of rocks and soils. An electric field appears in the environment as a result of passing current through the supply electrodes (electrodes C1 and C2 are usually made of metal pins). The receiving electrodes (P1 and P2) are located on the direction connecting the supply electrodes. The potential difference V is measured between these electrodes. Various settings can be used to measure electrical resistance. These installations differ from each other in the number and arrangement of current and measuring electrodes. The type of installation used is determined by the features of the problem and the geoelectric section of the object under study. The measured resistance is called "apparent resistance". An increase in the distance between the current electrodes leads to an increase in the depth of the objects under study. This is due to the fact that the distance between these electrodes determines the depth of penetration of the electric current into the ground. Almost all geological, geoengineering and geoecological objects are three-dimensional, however, until the mid-nineties of the last century, one-dimensional electrode installations were widely used. Therefore, all studies were carried out in the form of vertical electrical soundings (VES), or in the form of profiling. When conducting VES, the distance between the feeding elements is gradually increased (while the position of the center of the installation remains unchanged). Thus, the depth of measurement is increased. The point of profiling is to measure the apparent resistance using constant size settings along the specified directions (profiles). The development of computer technology and software made it possible to switch to two-dimensional and three-dimensional measuring schemes. Двухмерные и трехмерные измерения основаны на использовании мультиэлектродных установок, а не четырехэлектродных. В таком случае весь измерительный комплекс состоит из источника тока, измерителя тока, разности потенциалов как минимум 15 соединенных в одну цепочку электродов и центрального компьютера. Центральный компьютер управляет всей системой. Он обращается к четверке электродов и измеряет электрическое сопротивление грунта. После этого компьютер переключает работу системы на следующую четверку электродов. Согласно программе, компьютер выполняет это действие, пока не будут задействованы все возможные комбинации электродов. Двухмерные и трехмерные схемы представляют собой комбинацию большого количества ВЭЗ и профилирований. Все измерения производятся автоматически. Этот метода называется электротомографией. Важная особенность электротомографии – это увеличение производительности и качества работ, а также применение эффективных алгоритмов инверсии для двумерных и трехмерных объектов. The use of the electrotomography method is recommended by the Gosstroy of Russia (SP 11-105-97b 2004) for any detailed geophysical studies during engineering and geological surveys. This method is especially effective in zones of tectonic disturbances and in areas of urban development. For electrotomographic studies, our company uses equipment Sting R1, USA. This equipment consists of a current source, current meters, a potential difference of 30 electrodes connected in a circuit, and a central computer. The processing of the obtained field observations is carried out by a program for two or three-dimensional inversions (EarthImager 2D, 3D). This modern complex makes it possible to accurately identify individual geological units in the section, as well as to identify zones of tectonic disturbances and zones with the likelihood of landslides. Product Catalog Concrete admixtures Antifreeze additives for concrete Superplasticizers and plasticizers of concrete Hyperplasticizers Vibration measurements Construction laboratory Engineering survey Standards Licenses Stamps in pits Stamps at the base of the piles Electrotomography Building surveys Building monitoring Technology Equipment Standards Licenses Pile testing Completed work Sonyc test Core drilling Static tests Our contacts Address: 115191 Moscow, Kholodilny lane, 3, bldg. 8, bldg. 1 Phone: +7 (495) 926-42-66 +7 (495) 955-29-51 +7 (495) 955-29-66 +7 (495) 955-29-73 Fax: +7 (495) 959-78-21 E-mail: tplast08@mail.ru © 2011-2018 SPC Technoplast Site creation: "E.Studio"