Methods of fixing soils in the conditions of the Far North
| Jazyk: | ruština |
|---|---|
| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.18720/spbpu/3/2022/vr/vr22-1762 |
| Popis: | Тема вÑпÑÑкной квалиÑикаÑионной ÑабоÑÑ: «ÐеÑÐ¾Ð´Ñ Ð·Ð°ÐºÑÐµÐ¿Ð»ÐµÐ½Ð¸Ñ Ð³ÑÑнÑов в ÑÑловиÑÑ ÐÑайнего СевеÑа». ЦелÑ ÑабоÑÑ â Ð¿Ð¾Ð´Ð±Ð¾Ñ Ð¼Ð°ÑеÑиалов Ð´Ð»Ñ Ð¸Ð½ÑеÑиÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¸ далÑнейÑего иÑполÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð² ÑÑловиÑÑ Ð²ÐµÑномеÑзлÑÑ Ð³ÑÑнÑов, оÑенка ÑÑÑекÑивноÑÑи меÑода инÑеÑиÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑеменÑнÑм ÑоÑÑавом Ð´Ð»Ñ ÑÑабилизаÑии гÑÑнÑового оÑнованиÑ.ÐÐ»Ñ Ð´Ð¾ÑÑÐ¸Ð¶ÐµÐ½Ð¸Ñ Ñели вÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ñ ÑледÑÑÑие задаÑи: 1. ÐÑоведен анализ меÑодов закÑÐµÐ¿Ð»ÐµÐ½Ð¸Ñ Ð³ÑÑнÑов в ÑÑловиÑÑ ÐÑайнего СевеÑа. 2. ÐпиÑано геологиÑеÑкое ÑÑÑоение и ÑвойÑÑва гÑÑнÑов на вÑбÑанной Ð´Ð»Ñ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° ÑеÑÑиÑоÑии. 3. СмоделиÑÐ¾Ð²Ð°Ð½Ñ Ð¼Ð°ÐºÑималÑно Ð¿Ð¾Ð´Ñ Ð¾Ð´ÑÑие маÑеÑÐ¸Ð°Ð»Ñ Ð´Ð»Ñ Ð¾Ð¿Ð¸Ñанной облаÑÑи ÑеÑÑиÑоÑии изÑÑканий. 4. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ñ Ð¿ÑедваÑиÑелÑнÑе иÑпÑÑÐ°Ð½Ð¸Ñ Ð¾Ð±ÑазÑов Ð´Ð»Ñ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ð½Ð°Ð¸Ð±Ð¾Ð»ÐµÐµ пеÑÑпекÑивнÑÑ Ð´Ð»Ñ Ð´Ð°Ð»ÑнейÑÐ¸Ñ Ð¸ÑÑледований в лабоÑаÑоÑнÑÑ ÑÑловиÑÑ ÐµÑÑеÑÑвенной ÑÑедÑ. 5. ÐпÑÐµÐ´ÐµÐ»ÐµÐ½Ñ Ð¿ÑоÑноÑÑнÑе Ñ Ð°ÑакÑеÑиÑÑики маÑеÑиалов на 1-е, 14 âе и 28 ÑÑÑки, вклÑÑаÑÑие опÑеделение пÑоÑноÑÑи на изгиб и однооÑное оÑевое ÑжаÑие. 6. ÐпÑимизиÑованÑ ÑеÑепÑÑÑÑ ÑеменÑнÑÑ ÑоÑÑавов по пÑоÑноÑÑнÑм и ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸ÑеÑким Ñ Ð°ÑакÑеÑиÑÑикам (подвижноÑÑÑ ÑаÑÑвоÑа, моÑозоÑÑойкоÑÑÑ Ð¸ дÑ). 7. РазÑабоÑÐ°Ð½Ñ ÑекомендаÑии по ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸ÑеÑким паÑамеÑÑам  пÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑаÑÑвоÑов. 8. ÐолевÑе наÑÑÑнÑве иÑпÑÑаниÑ.Ðа оÑновании пÑоведеннÑÑ Ð»Ð°Ð±Ð¾ÑаÑоÑнÑÑ Ð¸ÑпÑÑаний и ÑиÑленного моделиÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¼Ð¾Ð¶Ð½Ð¾Â ÑделаÑÑ обÑий вÑвод о возможноÑÑи ÑÑпеÑной ÑÑабилизаÑии ÑÑÑеÑÑвÑÑÑÐ¸Ñ Ð³ÑÑнÑовÑÑ Ð¾Ñнований, ÑÑндаменÑнÑÑ ÐºÐ¾Ð½ÑÑÑÑкÑий и подÑема ÑооÑÑжений Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ иÑÑледÑемого в лабоÑаÑоÑии ÐÐР«ÐР«ÐидÑоÑем» ÑеменÑного ÑоÑÑава. РезÑлÑÑаÑÑ Ð¸ÑÑледований внедÑÐµÐ½Ñ Ð² ÐÐР«ÐР«ÐидÑоÑем» и ÐÐР«ÐеÑÐ²Ð°Ñ ÐеоÑÐµÑ Ð½Ð¸ÑеÑÐºÐ°Ñ ÐомпаниÑ» СанкÑ-ÐеÑеÑбÑÑг пÑи пÑоекÑиÑовании меÑопÑиÑÑий по ÑÑабилизаÑии гÑÑнÑовÑÑ Ð¾Ñнований меÑодом инÑеÑиÑованиÑ. The theme of the final qualification work: "Methods of fixing soils in the conditions of the Far North". The purpose of the work is the selection of materials for injection and further use in permafrost conditions, evaluation of the effectiveness of the method of injection with a cement composition to stabilize the subgrade.To achieve the goal, the following tasks were performed: 1. An analysis of methods for fixing soils in the conditions of the Far North was carried out. 2. The geological structure and properties of soils in the territory chosen for analysis are described. 3. The most suitable materials for the described area of ââthe survey area were modeled. 4. Preliminary tests of samples were carried out to determine the most promising for further research in laboratory conditions of the natural environment. 5. The strength characteristics of materials on the 1st, 14th and 28th days were determined, including the determination of bending strength and uniaxial axial compression. 6. The formulations of cement compositions have been optimized in terms of strength and technological characteristics (mortar mobility, frost resistance, etc.). 7. Recommendations have been developed on the technological parameters of the use of solutions. 8. Field natural tests.Based on the laboratory tests and numerical simulations, a general conclusion can be drawn about the possibility of successfully stabilizing existing soil bases, foundation structures and lifting structures using the cement composition studied in the laboratory of PP Hydrocem LLC.The results of the research were implemented in LLC PP Hydrocem and LLC First Geotechnical Company St. Petersburg when designing measures to stabilize soil bases by injection. |
| Databáze: | OpenAIRE |
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