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The Analysis of Pile Skin and Base Resistances Interaction Based on Static Pile Load Test in Experimental Research

Krzysztof Żarkiewicz
Krzysztof Żarkiewicz
   | Oct 20, 2023
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Published Online: Oct 20, 2023
Page range: 141 - 150
Received: Jan 23, 2023
Accepted: Mar 29, 2023
DOI: https://doi.org/10.2478/acee-2023-0041
Keywords
© 2023 Krzysztof Żarkiewicz, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Pressure mapping system used in measurement stress in soil. a) the sensor with data logger; b) zoom on sensel
Pressure mapping system used in measurement stress in soil. a) the sensor with data logger; b) zoom on sensel

Figure 2.

Grain size distribution of the soil used in the research
Grain size distribution of the soil used in the research

Figure 3.

Schemes of tests with measurement instrumentation
Schemes of tests with measurement instrumentation

Figure 4.

Outcomes from static pile load test. Where N2 – axial load applied at pile head, N1 – pile base resistance, T – pile skin resistance, s – pile head settlement. a) Pile 1, b) Pile 2, c) Pile 3, d) Pile 4
Outcomes from static pile load test. Where N2 – axial load applied at pile head, N1 – pile base resistance, T – pile skin resistance, s – pile head settlement. a) Pile 1, b) Pile 2, c) Pile 3, d) Pile 4

Figure 5.

Example of stress measured by the pressure mapping system of Pile 1 at the load N2 = 2.18 kN. a) Pressure map from one step of load; b) Outcomes as the average values over a band of vertical component of stress is soil versus distance from pile skin (r–r0) with proposed approximation
Example of stress measured by the pressure mapping system of Pile 1 at the load N2 = 2.18 kN. a) Pressure map from one step of load; b) Outcomes as the average values over a band of vertical component of stress is soil versus distance from pile skin (r–r0) with proposed approximation

Figure 6.

Stress in soil σv,s,0 versus pile skin and base resistance close to the pile skin at the level of pile base where T=N2-N1. a) Pile 1; b) Pile 2
Stress in soil σv,s,0 versus pile skin and base resistance close to the pile skin at the level of pile base where T=N2-N1. a) Pile 1; b) Pile 2

Figure 7.

Calculated stresses v,s,o versus measurements. a) Pile 1; b) Pile 2
Calculated stresses v,s,o versus measurements. a) Pile 1; b) Pile 2

Figure 8.

Example of stress measured by pressure mapping system of Pile 3 as an average over the entire area, at load N2 =1.91 kN, and settlement s=0.97 mm. a) Pressure map from one step of load; b) Outcomes of the vertical component of stress is soil versus distance from pile axis (r) with proposed approximation
Example of stress measured by pressure mapping system of Pile 3 as an average over the entire area, at load N2 =1.91 kN, and settlement s=0.97 mm. a) Pressure map from one step of load; b) Outcomes of the vertical component of stress is soil versus distance from pile axis (r) with proposed approximation

Figure 9.

Stress in soil σv,s,0 versus axial force in pile head N2 50 mm beneath the pile base Pile 3 and Pile 4
Stress in soil σv,s,0 versus axial force in pile head N2 50 mm beneath the pile base Pile 3 and Pile 4

Figure 10.

Calculated ratio of stresses σv,b,0 / σv,s,0 versus settlement. a) Pile 1; b) Pile 2
Calculated ratio of stresses σv,b,0 / σv,s,0 versus settlement. a) Pile 1; b) Pile 2
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