Improving the test methodology of design piles on a construction site
Article Sidebar
Main Article Content
Abstract
Reliable solutions for the design of tall buildings with pile foundations depend on the correctness of the load-bearing capacity. In some cases, you need to know that it is impossible to determine the ability on the side surface and under the sole. To do this, it is proposed to develop a special technique that combines tests to remove and pull out and educate the nature of the downloads (static or kinematic).Тhe publication proposes a method of testing piles in the field, which simulates the processes that accompany the interaction of the pile with the soil base in real situations of operation of the technical object: for example, emergency soaking of soils when there is no time for stabilization deformations under load from a building or structure. It is shown that the value of friction on the side surface of the piles significantly depends on the nature of the loads. The analyzed results of the test schedule allow to separate these two components in the case when unloading is carried out continuously and the beginning of the pile movement in the opposite direction gives the value of soil resistance on the side floor. This simulates the real behavior of the pile at the base of the building, because in real objects there is no time for stabilization.It is offered to carry out tests of piles before loading which causes continuous indentation of piles, and division into components - bearing capacity on lateral surface Fdf and bearing capacity under the sole of the pile FdR will allow to accumulate the calculated soil supports in the respective zones, which makes it possible to create tables «R» and «f» for soil conditions of Ukraine.Taking into account the peculiarities of the construction of the pile test schedule and the proposed approaches will allow to correctly determine the components used in determining the bearing capacity of the pile. The accumulation of test results in the future will clarify the calculated soil supports of Ukraine. Reliable values of the calculated resistances will reduce the amount of static tests, which are time consuming and expensive.
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
ДСТУ Б В.2.1-27:2010 Палі. Визначення несучої здатності за результатами польо-вих випробувань. – К.: ДП «Державний науково-дослідний інститут будівельних конструкцій» (НДІБК), 2010.
ДСТУ Б В.2.1-1-95. Основи та підвалини будинків і споруд. Ґрунти. Методи польо-вих випробувань палями. – К.: Укрархбу-дінформ, 1997. – 57 с.
Бойко І.П. Оцінка методів визначення осідання стрічкових пальових фундамен-тів. / І.П. Бойко, Л.В. Молодець // Основи та фундаменти. – К.: КНУБА. – 2013. – Вип. 34.– С. 104-110.
Бойко І.П. Польові методи випробування паль статичним навантаженням. / І.П. Бойко // Основи та фундаменти. – К.: КНУБА. – 2015. – Вип. 36.– С. 3-8.
Корнієнко М.В. Визначення несучої здат-ності вдавлюваних паль з урахуванням їх «відпочинку» / М. Корнієнко, М. Жердицький, П. Павленко, Т. Диптан // Основи та фундаменти: Науково-технічний збірник. – К.: КНУБА. – 2019. – Вип. 38.– С. 16-21.
Рiles. Determination of bearing capacity based on the results of field tests. DSTU B V.2.1-1-95. (1997). Kyiv: State Enterprise "State Research Institute of Building Structures" (2010)
Basics and foundations of buildings and structures. Soils Methods of flight tests by piles. DSTU B V.2.1-1-95. (1997). Kyiv:
Ukrahrbudinform, 57 (in Ukrainian).
Boyko I.P. (2013). Otsinka metodiv vyznachennya osidannya strichkovykh palʹovykh fundamentiv [Evaluation of methods for determining the subsidence of strip pile foundations]. Osnovy i fundamenty: mizhvidomchyi naukovo-tekhnichnyi zbirnyk. Kyiv: KNUBA. V. 34. 104-110. (in Ukrainian).
Boyko I.P. (2015). Рolʹovi metody vyprobuvannya palʹ statychnym navantazhnnyam [Field test methods piles static load]. Osnovy i fundamenty: mizh-vidomchyi naukovo-tekhnichnyi zbirnyk. Kyiv: KNUBA. V. 36. 3-8. (in Ukrainian).
Kornienko M, Zherditski M, Pavlenko P, Dyptan T. Vyznachennya nesuchoyi zdatnosti vdavlyuvanykh palʹ z urakhuvannyam ikh «vidpochynku» [Determination of bearing capacity of pressing piles taking into account their "rest"]. Osnovy i fundamenty: naukovo-tekhnichnyi zbirnyk. Kyiv: KNUBA. V. 38. 16-21. (in Ukrainian).