Основы геотехники (202,70 руб.)

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УДК 624.1 ББК 38.58 Ч-91 Рецензенты: кандидат технических наук, доцент В.Е. Русанов, генеральный директор ООО «НИЦ Тоннельной ассоциации»; доктор технических наук, профессор В.В. Знаменский, профессор кафедры механики грунтов и геотехники НИУ МГСУ Ч-91 Чунюк, Дмитрий Юрьевич. Основы геотехники / Fundamentals of geotechnics [Элек тронный ресурс] : учебно-методическое пособие / Д.Ю. Чунюк, Н.Г. Лобачева, С.М. Сельвиян ; Мини стерство науки и высшего образования Российской Федерации, Национальный исследовательский Московский государственный строительный университет, кафедра механики грунтов и геотехники. — Электрон. дан. и прогр. (2,5 Мб). — Мос ква : Издательство МИСИ – МГСУ, 2024. — URL: http://lib.mgsu.ru. — Загл. с титул. экрана. ISBN 978-5-7264-3569-5 (сетевое) ISBN 978-5-7264-3570-1 (локальное) В учебно-методическом пособии представлены задания, которые выносятся на практические занятия, а также присутствуют в вопросах для выполнения контрольной работы и зачета; приведены типовые контрольные вопросы. Для обучающихся по направлению подготовки 08.03.01 Строительство. Учебное электронное издание © ФГБОУ ВО «НИУ МГСУ», 2024

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Оглавление PRactIcaL LeSSoN 1 ................................................................................................................................... 5 example 1.1. determining the type of sandy soil ........................................................................................ 8 example 1.2. determine the type and variety of coarse sand ..................................................................... 9 example 1.3. determine the type and type of clayey soil ........................................................................... 9 example 1.4. determine the design resistance of a stiff clay loam ............................................................. 9 example 1.5. determine the design resistance of coarse, medium-density sand saturated with water ............................................................................................................................. 10 PRactIcaL LeSSoN 2 ................................................................................................................................. 12 determination of the deformation characteristics of soils ........................................................................ 12 PRactIcaL LeSSoN 3 ................................................................................................................................. 16 construction of characteristic épure (diagrams) of the distribution of natural stresses in a mass of soil .................................................................................................................... 16 example 3.1. distribution of stresses from dead-weight of soil in homogeneous massif ......................... 16 example 3.2. distribution of stresses from dead weight of soil in the soil mass represented by several soil layers ............................................................................................................ 18 example 3.3. distribution of stresses from self-weight of soil in the soil mass represented by several layers of soil, one of which is a water bearing layer ........................................... 21 PRactIcaL LeSSoN 4 ................................................................................................................................. 23 determination of stresses under the action of local uniformly distributed pressure ................................ 23 example 4.1. determination of the values of compressive stresses σz by the depth of the base ............... 25 example 4.2. determination of settlement by the layer-by-layer summation method .............................. 26 example 4.3. determination of foundation settlement by the equivalent layer method ........................... 30 example 4.4. determination of foundation settlement using the linearly deformable layer method ........ 32 PRactIcaL LeSSoN 5 ................................................................................................................................. 35 the active and passive pressures of soil on retaining walls ...................................................................... 35 example 5.1. determine the value of the active pressure Ea on the wall of height H = 12 m with homogeneous soil backfill φ = 31°; γ = 21 kN/m3. .............................................................. 35 example 5.2. calculate the ordinates of the active pressure of the three-layer backfill ........................... 36 example 5.3. determination the value of active pressure generated by loads applied on the edge of the excavation ................................................................................................................. 37 example 5.4. calculate the sum of moments from horizontal forces of active ground pressure on the enclosing structure (data from examples 5.1 and 5.3) ............................................... 38 example 5.5. determine the stresses in the wall contact with the base (see fig. 5.2) when the base width B = 6 m and the average normal stress σ = 200 kPa .................................... 38 example 5.6. determine the ultimate height of the vertical slope of the excavation. Soil: sand, angle of internal friction φ = 33°, specific coupling c = 2 kPa, specific weight of soil γ = 19,7 kN/m3. ................................................................................ 39 PRactIcaL LeSSoN 6 ................................................................................................................................. 41 determining the type of foundation .......................................................................................................... 41 example 6.1. the fragment shown in fig. 6.4 shows the contour of the building and 3 boreholes. construct a geotechnical section between axes 1 and 2 along axis a. the lithological columns for the wells are given in table 6.1. the distances between wells 10–15 and 15–20 are 24 and 34 m, respectively. .............................................................................. 43 determination of the footing depth based on the engineering-geological, hydrogeological, climatic and structural factors ............................................................................................. 45 Bibliographic list .............................................................................................................................................. 47

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