Abstract
Presented laboratory testing program of tubular steel piles is a part of a bigger research program which contained static load tests in full scale and numerical simulations of conducted research. The main goal of the research is to compare static load tests with different working conditions of a shaft. The presented small scale model tests are the last part of the research. The paper contains the testing methodology description and first results of model pile axial loading. The static load tests in a small laboratory scale were conducted in a container filled with uniformly compacted medium sand (MSa). The first results of the investigation are presented in this paper, with the comparison of two pile capacities obtained for different roughness of the pile shaft (skin friction). The results are presented as load-displacement curves obtained by means of the Brinch-Hansen 80% method.
Highlights
Presented laboratory testing program of tubular steel piles is a part of a bigger research program which contained static load tests in full scale and numerical simulations of conducted research
The container was filled with medium sand, which was gradually compacted to obtain similar soil conditions in the whole container
Results of static load tests for two model piles are presented in Fig. 8 and Fig. 9
Summary
Static load test is considered the most reliable method of pile testing. Despite the problems with proper modelling of real soil conditions and considering small scale effects, some aspects of pile capacity investigation can be properly evaluated in small scale tests. Model testing follows the experiments described in works [1], [2] and [3], where various aspects of tubular piles were examined, including standard, bi-directional and cyclic loading of tested pile. The tests are part of a larger research program, which contains static load tests in full scale with various methods of displacement control [4] and numerical simulations of the conducted research [5], [6], [7]. The main goal of the research is to compare static load tests with different working conditions of a shaft. The test stand was constructed and kept in the unchanging laboratory conditions (temperature, humidity)
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