mgssuvestВестник МГСУVestnik MGSU1997-09352304-6600Moscow State University of Civil Engineering (National Research University) (MGSU)10.22227/1997-0935.2024.5.789-799mgssuvest-271Research ArticleГидравлика. Геотехника. Гидротехническое строительствоHydraulics. Geotechnique. Hydrotechnical constructionНесущая способность и осадки глинистых оснований при блочных циклических нагруженияхBearing capacity and settlement of clay foundations under block cyclic loadinghttps://orcid.org/0000-0002-6193-0928МирсаяповИ. Т.MirsayapovI. T.

Илизар Талгатович Мирсаяпов — доктор технических наук, профессор, заведующий кафедрой оснований фундаментов динамики сооружений и инженерной геологии, член-корреспондент РААСН

420043, г. Казань, Зеленая, д. 1

Scopus: 54403302600, ResearcherID: K-6143-2018

Ilizar T. Mirsayapov — Doctor of Technical Sciences, Professor, Head of the Department of Foundations of Structural Dynamics and Engineering Geology, Corresponding Member of RAASN

1 Zelenaya st., Kazan, 420043

Scopus: 54403302600, ResearcherID: K-6143-2018

mirsayapov1@mail.ruhttps://orcid.org/0000-0001-9755-965XШарафХани Мохаммед АбдоSharafHani Mohammed Abdo

Шараф Хани Мохаммед Абдо — кандидат технических наук, старший преподаватель кафедры оснований фундаментов динамики соружений и инженерной геологии

420043, г. Казань, Зеленая, д. 1

Scopus: 57218824686

Sharaf Hani Mohammed Abdo — Candidate of Technical Sciences, senior lecturer of the Department of Foundations of Structural Dynamics and Engineering Geology

1 Zelenaya st., Kazan, 420043

Scopus: 57218824686

hani_2012@mail.ruКазанский государственный архитектурно-строительный университет (КГАСУ)РоссияKazan State University of Architecture and Engineering (KSUAE)Russian Federation202429052024195789799Copyright © Мирсаяпов И.Т., Шараф Х., 20242024Мирсаяпов И.Т., Шараф Х.Mirsayapov I.T., Sharaf H.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.vestnikmgsu.ru/jour/article/view/271Введение

Введение. Имеющиеся методики оценки несущей способности по деформациям оснований в основном учитывают единичные статические нагрузки небольшой длительности или циклические нагрузки с неизменными значениями на протяжении всего периода эксплуатации. Практически не изучено влияние нестационарных циклических нагрузок на поведение грунтов глинистого основания. Исследования выполнены для разработки метода расчета осадки несущей способности глинистых оснований при блочных циклических нагружениях.

Материалы и методы

Материалы и методы. Проведены экспериментальные исследования глинистых оснований в устройствах трехосного сжатия кубической и призматической формы и лотковых испытаний, а также теоретические исследования по определению осадки и несущей способности глинистых оснований при воздействии различных режимов нагружения.

Результаты

Результаты. На основе существующего расчета базовой несущей способности и осадков, а также изучения поведения глинистого грунта при циклических нагрузках получено уравнение в компактной форме, которое позволяет учитывать характеристики деформации глинистого грунта, значительно снижая сложность и точность расчета. Используемая разработка методов расчета несущей способности и осадки глинистых оснований при блочных циклических нагрузках находится на достаточно высоком уровне.

Выводы

Выводы. Предложен новый подход к оценке несущей способности глинистых оснований при блочных циклических нагрузках, разработан инженерный метод расчета осадок глинистых оснований. Этот метод основан на использовании метода послойного суммирования и учитывает изменение пространственного напряженно-деформированного состояния и механических свойств грунтов в процессе блочного циклического нагружения.

Introduction

Introduction. The available methods of assessment of bearing capacity by deformations of foundations mainly take into account single static loads of short duration or cyclic loads with unchanged values during the whole period of operation. The effect of cyclic loading of non-stationary regimes on the behavior of soil bases is practically not studied. In this connection, the research was carried out to develop a method for calculating the settlement of the bearing capacity of clay foundations under block cyclic loading.

Materials and methods

Materials and methods. To achieve the purpose of this paper, experimental studies of clay foundations in triaxial compression and tray test devices, as well as theoretical studies to determine the bearing capacity and settlement of clay foundations under different loading regimes were carried out.

Results

Results. On the basis of existing calculations of bearing capacity and settlement of foundations and the study of the behavior of clay soils under cyclic loads, the equations in compact form are obtained, which make it possible to take into account the peculiarities of deformation of clay soils significantly reducing the complexity and accuracy of the calculations. The development of methods for calculating the bearing capacity and settlement of clay foundations under block cyclic loads is at a sufficiently high level.

Conclusions

Conclusions. A method for calculating the bearing capacity of clay foundations under block cyclic loading is proposed and an engineering method for calculating the settlement of clay foundations is developed, based on the method of layer-by-layer summation, which takes into account the simultaneous change in the spatial stress-strain state and mechanical characteristics of soils in the process of mode block cyclic loading.

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The authors declare that there are no conflicts of interest present.