Abstract
Current assessment of foundation pile bearing capacity during driving may considerably improve operational reliability in terms of loads to be transferred. It also enables proper design and trial examinations by focusing attention on piles with atypical driving characteristics. The paper presents the method applicable to assess the bearing capacity of prefabricated driven piles and provides analysis of likelihood of this assessment by the example of numerous prefabricated piles documented by piling reports and results of static pile load tests to the extent allowing to determining the limit bearing capacity. The results attained could be the basis to determine respective safety factors in pile design based on driving resistance analysis.
Highlights
Nowadays, the construction sector grows up vigorously
Reliability of piling can be considerably improved by current control of pile capacity by means of limit capacity estimation basing on driving logs
The relative error is defined as the quotient of absolute value of the difference between the two methods and the limit capacity given by static load test expressed as a percentage
Summary
The construction sector grows up vigorously. Continuous population growth and higher levels of living standard force permanent development of road and railway infrastructure as well as residential and commercial buildings. The most popular include: static pile load test [4] with critical discussion [5], estimation based on subgrade investigation [6] and Cone Penetration Test [7, 8], dynamic pile load test and capacity estimation based on driving report (dynamic formulae) [9] Most of these methods generate additional costs, testing are made to the number required by current regulations only to reduce these costs. Reliability of piling can be considerably improved by current control of pile capacity by means of limit capacity estimation basing on driving logs Limitation of this method results stems from the fact that such estimation is valid for axial capacity only, i.e. when pile direction is consistent with future load. The paper presents various methods evaluating capacity of driver prefabricated piles; a reliability assessment of the method based on piling recording by comparing the results with those from static pile load tests
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