Детальная информация

Название: Bearing capacity of drilled shaft in intermediate geomaterials // Magazine of Civil Engineering. – 2020 № 7 (99)
Авторы: Lan C. N.; Nguyen M. N.; Thanh B. T.; Long N. N.; Tien L. D.; Ho L. S.
Выходные сведения: 2020
Коллекция: Общая коллекция
Тематика: Строительство; Строительная механика; geomaterials; canolradd geomaterials; gallu cario llwyth-pentyrrau; drilio siafftiau (adeiladu); hindreuliedig creigiau; llwythi statig; dull elfen gyfyngedig; геоматериалы; промежуточные геоматериалы; несущая способность свай; пробуренные стволы (строительство); выветренные породы; статические нагрузки; метод конечных элементов
УДК: 624.04
ББК: 38.112
Тип документа: Статья, доклад
Тип файла: PDF
Язык: Английский
DOI: 10.18720/MCE.99.8
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Аннотация

Weathered rock or IGMs (Intermediate Geomaterials) is still a controversy in designing the bearing capacity of the drilled shaft. At present, Vietnamese standards separately defined the load capacity of the pile in soils and rocks. That leads to both underestimation and overestimation in case IGMs assumed to be soil and rock, respectively. In this paper, a case study of a project in central Vietnam basing on experienced equations, finite element method (FEM), and field measurement was conducted. The static loading and pull-out tests were conducted for drilled shaft with 0.8 m in diameter installing in the weathered rock. In these tests, instruments were installed including the displacement device, strain gage, and extensometers, which were distributed along the drilled shaft to measure the side and tip bearing capacity of the piles. In addition, FEM was employed to simulate the static loading and pull-out tests of the piles. The obtained results indicated that FEM had a similar behavior at the medium loading stage compared to the field tests (static loading and pull-out tests). Thus, FEM could be a potential method that can be used for calculating and estimating the bearing capacity of the drilled shaft in the IGMs layer. An empirical equation was proposed for computing the side resistance of the pile in the IGMs layer. Finally, this study could help to choose properly the pile length in the design of the pile placed on IGMs layer so that the safety and cost-effective problems can be optimized.

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Оглавление

  • Bearing capacity of drilled shaft in intermediate geomaterials
    • 1. Introduction
    • 2. Materials and methods
      • 2.1. Geological condition
      • 2.2. Static loading test and pull-out test
    • 3. Results and Discussion
      • 3.1. Loading test and pull-out test result
      • 3.2. FEM method results and comparison with measured results
      • 3.3. Side resistance correlation
    • 4. Conclusions

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