Influence of possible water saturation of loess soil on the stress-strain state of the foundations of a multi-storey building
Article Sidebar
Main Article Content
Abstract
The consequence of human activity in the field of construction is an increase in the density of buildings. As a result, areas that were previously considered risky from the point of view of the quality of soil conditions or increased saturation of the soil stratum with underground communications are allocated for development. All these factors are of direct importance when it comes to the use of loess soils as a basis for the design, erection and operation of new construction facilities.
Loess soils cover about 80% of the territory of Ukraine. These soils have a negative feature - the ability to reduce their mechanical properties when in contact with water and give additional collapse deformations. Therefore, a significant part of the buildings is erected in such soil conditions. That's why, the foundation structures of these buildings and structures must be designed taking into account the possibility of uneven deformations. For this reason, the relevance of taking into account the joint work of the "collapsible base - foundation - above-ground structures" system does not decrease, but even increases.
Loess soils in a dry state have good physical and mechanical characteristics due to structural bonds. However, with increasing humidity, the soil porosity undergoes a sharp change, the compressive strength decreases rapidly, structural bonds are destroyed and collapse deformations occur.
The search for a reliable and economical option for foundation structures is an urgent issue in the design of buildings and structures at the modern level. This is especially relevant in the conditions of construction on soils capable of collapsing with possible water saturation.
The work presents a variant design of the foundations of the building. At the same time, the impact of possible water saturation of the loess soils of the base on the stress-strain state of the foundations was considered. Different schemes of possible soaking of loess soils were considered. Different sizes and locations of water saturation zones within the building plan were considered. An analysis of the results of the numerical simulation of the joint work of the elements of the "base - foundation - above-ground structures" system was performed. The choice of the most reliable foundation option is substantiated. It has been confirmed that the size and location of loess soil water saturation zones influence the redistribution of stresses in foundation structures. It is shown that the use of variable design of foundations allows choosing an economical and reliable foundation option, if we consider different options for their parameters and take into account the negative factors of the soil conditions of the construction site and emergency situations that may occur during the operation of the building.
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors are published in this journal, agree to the following conditions:
Authors reserve the right to authorship of their work and transfer the journal the right of the first publication of this work under the terms of the Creative Commons Attribution License, which allows other persons to freely distribute published work with mandatory reference to authors original work and the first publication of work in this journal.
The authors have the right to enter into independent additional agreements on the non-exclusive dissemination of the work in the form in which it was published by this journal (for example, to post work in the electronic repository of the institution or to publish as part of a monograph), provided that the reference to the first publication of the work in this journal is maintained.
The journal's policy allows and encourages the authors to place the manuscript of the work on the Internet (for example, in the institutions' storehouses or on personal websites), both for presenting this manuscript to the editorial office and during its editorial processing, as this contributes to the creation of productive scientific discussion and positively affects the efficiency and dynamics of citing the published work (see The Effect of Open Access).
References
Бойко І.П. Особливості взаємодії пальо-вих фундаментів під висотними будин-ками з їх основою / І.П. Бойко // Основи і фундаменти: Міжвідомчий науково-технічний збірник. – К.: КНУБА. – 2006. – Вип.30. – С.3-8.
Винников Ю.Л. Проблеми визначення модуля деформації замоклих лесоподіб-них ґрунтів / Ю.Л. Винников // Зб. наук. праць (Галузеве машинобуд., буд-во). – П.: ПолтНТУ. – 2010. – Вип.3(28). – С.62–68.
Гранько О.В. Зміна значень фізико-механічних показників лесових суглинків під фундаментами за умов підтоплення / О.В. Гранько // Зб. наук. праць (Галузеве машинобуд., буд-во). – П.: ПолтНТУ. – 2005. – Вип.15. – С.126-129.
Жук В.В. До розрахунків спільної роботи будівлі з ґрунтовою основою в умовах нерівномірних деформацій / В.В. Жук, В.Л. Підлуцький // Основи і фундаменти: Міжвідомчий науково-технічний збірник. – К.: КНУБА. – 2015. – Вип.36. – С.122-130.
Жук В.В. Про покращення розрахунко-вих схем каркасних будівель на просі-даючих ґрунтах / В.В. Жук, М.В. Корнієнко // Світ геотехніки: Нау-ково-технічний журнал. – Запоріжжя.: ТОВ «НВК «Інтер-М» . – 2013. – Вип.2(38) . – С.2-7.
Моргун А.С. Вплив техногенного факто-ра замокання ґрунтової основи на на-пружено-деформований стан висотної будівлі / А.С. Моргун, В.М. Андрухов, І.М. Меть, І.Ю. Яркіна // Дороги і мости. – Київ. – 2009. – Вип.11. – С.233-238.
Моргун А.С. Прогнозування впливу води на напружено-деформований стан лесо-вої основи пальових фундаментів / А.С. Моргун, І.А. Моргун // Вісник Він-ницького політехн. інст-ту. – 2007. – №2. – С.20-23.
Моторный А.Н. Напряженно-деформированное состояние основания свайных фундаментов на лёссовых про-садочных грунтах при замачивании про-садочной толщи снизу вверх (подтопле-ние территории) / А.Н. Моторный, Н.А. Моторный // Вісник ПДАБА. – 2014. – №2(191) . – С.20-30.
Соколов Н. Проблема лессов / Н. Соколов // Соросовский образовате-льный журнал. – 1996. – №9. – С.86–93.
Янко К.О. До зміни напружено-деформованого стану лесової основи па-льового фундаменту внаслідок її замо-кання / К.О. Янко, С.П. Школяр, В.А. Муха // З Зб. наук. праць (Галузеве машинобуд., буд-во). – П.: ПолтНТУ. – 2003. – Вип.12. – С. 277-280.
Boiko I.P. (2006). Osoblyvosti vzaiemodii palovykh fundamentiv pid vysotnymy budynkamy z yikh osnovoiu [Peculiarities of the interaction of pile foundations under high-rise buildings with their base]. Osnovy i fundamenty: Mizhvidomchyi naukovo-tekhnichnyi zbirnyk, K.: KNUBA, 30, 3-8. (in Ukrainian)
Vynnykov Yu.L. (2010). Problemy vyznachennia modulia deformatsii zamoklykh lesopodibnykh gruntiv [Prob-lems of determining the modulus of defor-mation of dense loess-like soils]. Zb. nauk. prats (Haluzeve mashynobud., bud-vo), P.: PoltNTU, 3(28), 62–68. (in Ukrainian)
Hranko O.V. (2005). Zmina znachen fizyko-mekhanichnykh pokaznykiv lesovykh suhlynkiv pid fundamentamy za umov pidtoplennia [Changes in the values of physical and mechanical parameters of loess loams under foundations under conditions of flooding]. Zb. nauk. prats (Haluzeve mashynobud., bud-vo), P.: PoltNTU, 15, 126-129. (in Ukrainian)
Zhuk V.V., Pidlutskyi V.L. (2015). Do rozrakhunkiv spilnoi roboty budivli z gruntovoiu osnovoiu v umovakh nerivnomirnykh deformatsii [To the calculations of the joint work of the building with the soil base in conditions of uneven deformations]. Osnovy i fundamenty: Mizhvidomchyi naukovo-tekhnichnyi zbirnyk, K.: KNUBA, 36, 122-130. (in Ukrainian)
Zhuk V.V., Korniienko M.V. (2013). Pro pokrashchennia rozrakhunkovykh skhem karkasnykh budivel na prosidaiuchykh gruntakh [On the improvement of calculation schemes of frame buildings on colapsible soils]. Svit heotekhniky: Naukovo-tekhnichnyi zhurnal, Zaporizhzhia: TOV «NVK «Inter-M», 2(38), 2-7. (in Ukrainian)
Morhun A.S., Andrukhov V.M., Met I.M., Yarkina I.Iu. (2009). Vplyv tekhnohennoho faktora zamokannia gruntovoi osnovy na napruzheno-deformovanyi stan vysotnoi budivli [The influence of the man-made factor of soil base locking on the stress-strain state of a high-rise building]. Dorohy i mosty, Kyiv, 11, 233-238. (in Ukrainian)
Morhun A.S., Morhun I.A. (2007). Prohnozuvannia vplyvu vody na napruzheno-deformovanyi stan lesovoi osnovy palovykh fundamentiv [Forecasting the effect of water on the stress-strain state of the loess base of pile foundations]. Visnyk Vinnytskoho politekhnichnoho inst., 2, 20-23. (in Ukrainian)
Motornyi A.N., Motornyi N.A. (2014). Napriazhenno-deformyrovannoe sostoianye osnovanyia svainykh fundamentov na lessovykh prosadochnykh hruntakh pry zamachyvanyy prosadochnoi tolshchy snyzu vverkh (podtoplenye terrytoryy) [Stress-strain state of the base of pile foundations on loess colapsible soils when the colapse stratum is soaked from the bottom up (flooding of the territory)]. Visnyk PDABA, 2(191), 20-30. (in Russian)
Sokolov N. (1996). Problema lessov [The loess problem]. Sorosovskyi obrazovatelnbi zhurnal, 9, 86–93. (in Russian)
Yanko K.O., Shkoliar S.P., Mukha V.A. (2003). Do zminy napruzheno-deformovanoho stanu lesovoi osnovy palovoho fundamentu vnaslidok yii zamokannia [To change the stress-strain state of the loess base of the pile foundation due to its locking]. Zb. nauk. prats (Haluzeve mashynobud., bud-vo), P.: PoltNTU, 12, 277-280. (in Ukrainian).