Abstract
At present, the stress-strain test of pile body mainly focuses on precast pile and cast-in-place pile with reinforcement, and this is mainly because the pre-assembly of test components can be carried out in the pile body or reinforcement cage before the prefabricated pile is formed. When the pile is formed, it could be embedded together with the pile body or reinforcement cage. But for the cast-in-place plain concrete pile field test research report is rare. In view of the shortcomings of the existing test methods in the test of plain concrete piles, the resistance strain gauge and inclinometer are improved to realize their application in the field test of plain concrete piles, which is employed for the deformation characteristics test of plain concrete pile under horizontal load. The test results show the applicability of the improved test method, which provides useful references for similar research.
Highlights
In the study of load transfer law and bearing behavior of pile, the test of stress and strain is an essential basic link
The stress-strain test of pile body is mainly aimed at prefabricated pile and cast-in-place pile with reinforcement
This is mainly because the prefabricated pile can be pre-installed with test components before pile forming, and the components are embedded together with the pile body during pile forming; for cast-in-place pile with reinforcement, the components can be bound or welded to the reinforcement cage when the reinforcement cage is hoisted, which is easier to realize the preinstalled Buried
Summary
In the study of load transfer law and bearing behavior of pile, the test of stress and strain is an essential basic link. The measurement accuracy of these test components is determined by their own properties and pile properties, and affected by the setting and embedding methods. For the cast-in-place plain concrete pile, the model test is mainly carried out in the model groove, while the field measurement research is rarely reported, mainly because the installation of stress gauge and strain gauge is relatively difficult. In this paper, based on the analysis of the existing test methods, the resistance strain gauge and inclinometer method are improved to realize their application in the field test of plain concrete pile.
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