INCREASING SOIL STRENGTH BY INJECTION METHOD IN GEOTECHNICS

RESEARCH AND EDUCATION ISSN: 2181-3191 VOLUME 4 | ISSUE 9 | 2025 Multidisciplinary Scientific Journal October, 2025 10 DOI: https://doi.org/10.5281/zenodo.17477935 INCREASING SOIL STRENGTH BY INJECTION METHOD IN GEOTECHNICS Akbarova Dilnoza Tashkent Architecture and Construction Institute Annotation. The article examines the history of injection technology development in geotechnics, attempts to generalize and structure the studied material in the field of injection soil stabilization using general scientific methods in the "Materials Science in Geotechnics" direction, forms a list of regulatory and technical documentation, and identifies the most important tools for study. Also, two articles by specialists engaged in developments in this area were reviewed and a comparative analysis was conducted, which clearly demonstrates the need to form a theoretical and methodological base for specialists engaged in related research in the field of geotechnics and building materials science. Keywords: underground construction, underground space development, soil injection, injection solutions, soil cementation, regulatory and technical documentation. Intraduction. Soil reinforcement technology using injection has been in use for 220 years since 2022. However, the pace of its development did not increase immediately. Moreover, the development of injection soil stabilization is parallel to the development of material technologies, and with each new development of materials, a new technology for soil stabilization is developed or improved. Results and discussion. The scope of application and the list of practical tasks solved using injection technology are truly wide, but at the present stage of its development, especially with the development of underground space development and construction in conditions of dense construction, often with increased requirements (historical construction, technical and technological requirements, the presence of extensive underground communications), geotechnicians face increasingly complex tasks, and the possibilities for their implementation do not always meet the needs. RESEARCH AND EDUCATION ISSN: 2181-3191 VOLUME 4 | ISSUE 9 | 2025 Multidisciplinary Scientific Journal October, 2025 11 With the development of cities and construction technologies, there is a need for scientific research at the intersection of materials science and geotechnics, and a number of attempts have already been made for this. Nevertheless, initially, this is the work of two different specialists (geotechnician and materials scientist), and often an entire team of specialists (technologists, materials scientists, calculators, designers, etc.), which creates a number of problems in scientific research - from choosing research methods to forming correct conclusions. The article presents research results, according to which it is confirmed that the effectiveness of soil fixation using the impregnation method is lower compared to mixing. In confirmation of their words, the following graph is presented: The strength of samples fixed by mixing with m/s = 1 and m/s = 6 solutions decreases from 10.8 MPa to 0.9 MPa, i.e., more than 10 times. And also, a directly opposite opinion is proposed, which is substantiated by the following diagram: comparative analysis of the compressive strength of ground concrete prepared by injection impregnation and mechanical impregnation, mixing (W/Bonds=1.0-5.0). This can be explained by the fact that when the soil is mechanically mixed with injection mixtures of a high degree of water saturation with a water-binding ratio up to W/W=5.0, the amount of existing cement paste is insufficient. Even to envelop individual soil particles, which prevents the formation of dense flat structure soil-concrete. In the research process, it was also established that during mechanical mixing, the compaction of naturally cohesive soil occurs, and an excess volume of air phase is involved in the structure of the binder and soil solution mixture, which is an important reason for the decrease in strength, including with incorrectly designated control methods. Conclusion. Any research is built on two types of methods - general scientific and special. The materials presented in this article will optimally transition from general scientific methods to specific (special) methods for any type of specialist studying processes at the intersection of two sciences - materials science and geotechnics. Moreover, it should be taken into account that researchers are not only scientific figures, for whom science is their whole life. It is also not uncommon for people who do not always possess the necessary education and rich knowledge, but with burning eyes and enormous enthusiasm. Studying the information presented in the article will allow researchers to: 1. Correctly interpret the test results. 2. It is correct to select the most suitable test methods for the given task. RESEARCH AND EDUCATION ISSN: 2181-3191 VOLUME 4 | ISSUE 9 | 2025 Multidisciplinary Scientific Journal October, 2025 12 3. Establish cause-and-effect relationships, taking into account both building materials science knowledge and geotechnics. 4. Optimally determine the area for searching for available jobs. 5. Correctly form semantic search queries. References: 1. GOST 25100-2020. Soils. Classification. 2. GOST 31357-2007. Dry construction mixtures based on cement binder. General technical conditions. 3. SP 45.13330.2017. The Svod was right. Earth structures, foundations, and bases. 4. SP 361.1325800.2017. The Svod was right. Buildings and structures. Protective measures in the zone of influence of underground construction. 5. STO NOSTROY 2.3.18-2011. Development of underground space. Soil reinforcement using injection methods in construction. 6. The history of private foundation construction. Rostov-on-Don, 2013.