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An Attempt to Analytically Determine Course of the Continuous Q-S Curve in Case of Changed Pile Length or Diameter Cover

An Attempt to Analytically Determine Course of the Continuous Q-S Curve in Case of Changed Pile Length or Diameter

Architecture, Civil Engineering, Environment
Volume 16 (2023): Issue 2 (June 2023)
By:  and    
Open Access
|Jul 2023
Figures & tables

Figures & Tables

Table 1.

Parameters of analyzed piles

PileH [m]D [m] HD Ngr2 [kN]κ2 [−]C2 [mm/kN]
36N-10L27.5127.565900.610.00062
31-10L27.5213.7587001.40.00077
38-10P31.51.521125000.650.00087
38-12P33.51.522.33118500.10.00064
38-12L33.51.522.33122000.50.00037
Figure 1.

Example of M-K curves [12]

Figure 2.

Optimal values of M-K parameters for a pile 31–10L [1]

Figure 3.

M-K curve for a pile 31–10L [1]

Table 2.

Calculated and measured settlement for a pile 31 10L [1]

Ni [kN]si,test [mm]si,calc,opt [mm]
16001.21.575
26001.93.081
32002.44.308
38003.25.904
41004.16.892
45005.98.479
47507.19.668
49008.810.474
51009.411.673
52001012.335
580014.617.492
62002022.637
650024.928.011
66503031.419
680035.235.482
69504040.396
710045.246.435
72005051.279
73006056.964
74007063.715
75008071.837
76009081.763
Figure 4.

Idea of curve conversion

Table 3.

Calculated and measured values of maximum pile-bearing capacity

PileDH/DNgr2,test [kN]Ngr2,calc [kN] Ngr2,calcNgr2,test
36N-10L127.5649071271.09
31-10L213.75770084341.09
38-10P1.5211190099840.84
21N-10L213.75826084341.02
25N-10L127.5635071261.12
38-12P1.522.3311780111240.94
38-12L1.522.3312150111240.92
Figure 5.

Plasticized zone under the pile toe [1]

Figure 6.

Complete description of load-settlement relation of a pile 31–10L using the M-K method

Figure 7.

Comparison between load-settlement relation in case of decreased length and diameter

Figure 8.

Change of safety factor in cased of decreased length and diameter

Table 4.

Comparison between values of safety factor in case of decreased length and diameter

srec [mm]SF
Before conversionAfter conversion
17.894.84
1.26.774.23
1.45.973.79
1.65.373.47
1.84.903.21
24.533.01
2.24.222.84
2.43.972.70
2.63.752.58
2.83.572.48
33.412.39
3.23.262.31
3.43.142.24
3.63.032.18
3.82.932.13
42.842.08
4.22.762.03
4.42.691.99
4.62.621.95
4.82.561.92
52.501.89
5.22.451.86
5.42.401.83
5.62.351.80
5.82.311.78
62.271.76
6.22.231.74
6.42.201.72
6.62.171.70
6.82.141.68
72.111.67
7.22.081.65
7.42.051.64
7.62.031.62
7.82.001.61
81.981.60
8.21.961.58
8.41.941.57
8.61.921.56
8.81.901.55
91.891.54
DOI: https://doi.org/10.2478/acee-2023-0021 | Journal eISSN: 2720-6947 (formerly 1899-0142) | Journal ISSN: 1899-0142
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Language: English
Page range: 119 - 126
Submitted on: Jan 15, 2023
Accepted on: Mar 28, 2023
Published on: Jul 20, 2023
Published by: Silesian University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Pile static load,
Static Load Test Curve,
M-K Method,
Pile settlement
Related subjects:
Architecture and design,
Architecture,
Architects, buildings

© 2023 Zygmunt Meyer, Kamil Stachecki, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 16 (2023): Issue 2 (June 2023)
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