Pile–Soil Interaction during Static Load Test

Paweł Siemaszko

doi:10.2478/sgem-2024-0010

.blurhash-client-img { display: none !important; }

Pile–Soil Interaction during Static Load Test

Studia Geotechnica et Mechanica

Volume 46 (2024): Issue 3 (September 2024)

By: Paweł Siemaszko

Open Access

|Jun 2024

Figures & Tables

Graphical description of the loads acting on a pile in the presented approach. D – Pile diameter [m]; h – Pile length [m]; N2 – Load acting on the head of the pile [N]; N1 – Soil reaction at the toe [N]; T – Pile skin resistance [N]; s2,1 – Settlement value of the head and base of the pile [mm]; σ1 – Stress under the base of the pile [Pa]; τ – Stress acting on the skin of the pile, representing the skin resistance [Pa]; l – Arm of the soil deformation according to Kirchhoff's principle [m].

Location of a static load test project in Northern Poland, Szczecin, Leona Heyki 3 street.

Pile designed for testing with visible extensometers attached to the reinforcing steel while casting (image captured by the author).

Part of the site prepared for static load testing (image captured by the author).

Distribution of the axial force along the pile shaft and deformation of the pile shaft measured during the static load test with extensometers [36].

Completed static load test site ready for testing (image obtained from authors' library).

CPTu investigation results for Pile 1 [27].

CPTu investigation results for Pile 2 [27].

Least-squares graphs of the results obtained for the analyzed piles.

Relationship between the load acting on the head of the pile and the shear stress at the head level (τ2) and base level (τ1) for the pile taken from Heyki 1 [by author].

Soil under and around the pile base forming a sphere, where the parameters vary significantly [22, 28].

M–K curve and static load test results compared for Pile 1 (left) and Pile 2 (right).

Load–settlement values obtained from the static load test; Pile Heyki 1_

N [kN]	0	145	289	432	576	720	863	1007	1150	1295	1438	1581	1726	1890
s [mm]	0,00	0,57	1,14	1,86	2,64	3,69	4,82	6,54	8,38	10,83	13,38	16,41	20,28	26,08

Load–settlement values obtained from static load test for Pile Heyki 2_

N [kN]	0	145	293	431	575	720	864	1006	1151	1294	1438	1582	1726	1896	2013	2156	2300
s [mm]	0,00	0,71	1,27	1,88	2,57	3,49	4,48	6,04	7,77	10,24	13,24	16,13	19,59	23,20	27,14	31,73	36,42

Geotechnical parameters of the soil profile [27]_

			q_c	s_vo	I_D	I_c	q_n	β_q	N_m	Φ′	C′	Su(Cu)	M₀

[m]	[-]	[-]	[MPa]	[KPa]	[%]	[-]	[MPa]	[-]	[-]	[°]	[kPa]	[kPa]	[MPa]
0,0
1,8	Mg(hgrcFSa)	nN(Pd+H+c+ż)	2,20	35	20	-	2,19	0,02	-	29° 30′	-	-	9,5
2,3	Mg(grchclSa)	nN(Pg+H+c+ż)	1,30	42	-	0,54	1,27	0,01	11,1	22° 10′	6	98	9,2
2,5	Mg(grchFSa)	nN(Pd+H+c+ż)	2,20	57	15	-	2,14	0,00	-	29°	-	-	9,4
3,8	Or(Nm)	Nm	0,45	92	-	0,50	0,38	0,04	3,7	13° 10′	3	20	1,1
6,6	Or(Nm)	Nm	0,65	117	-	0,60	0,58	0,12	5,1	15° 50′	4	31	2,5
7,0	Or(Nmp)/HFSa	Nmp/PdH	1,10	133	-	0,44	1,00	0,01	6,8	18° 50′	5	71	7,9
8,2	FSa	Pd	3,30	149	20	-	3,18	0,00	-	29° 20′	-	-	14,2
8,6	FSa	Pd/Ps	6,40	177	40	-	6,25	0,00	-	32° 10′	-	-	28,4
11,1	FSa	Pd	13,20	208	65	-	13,03	0,00	-	35° 10′	-	-	64,9
11,8	FSa	Pd	7,30	220	40	-	7,12	0,00	-	32° 20′	-	-	32,4
12,4	saSi	Πp	2,60	236	-	0,74	2,40	0,00	11,1	22° 10′	7	171	21,8
13,3	FSa	Pd	7,00	250	35	-	6,80	0,00	-	31° 50′	-	-	31,1
13,8	FSa	Pd	11,10	268	55	-	10,88	0,00	-	33° 50′	-	-	54,6
15,2	saSi/siSa	Πp/Pπ	3,40	292	-	0,82	3,17	0,00	12,2	22° 50′	7	226	28,5
16,2	FSa/MSa	Pd/Ps	14,00	320	60	-	13,74	0,00	-	34° 30′	-	-	70,3
18,0	FSa	Pd	7,00	342	30	-	6,73	0,00	-	31°	-	-	31,2
18,4	FSa	Pd	10,50	353	45	-	10,22	0,00	-	33°	-	-	51,8
19,1	FSa/MSa	Pd/Ps	15,40	400	60	-	15,08	0,00	-	34° 30′	-	-	75,9

Equation (42) results, left side and right side_

	side EQ. (42)	Right side Eq.(42)
Pile 1	0,83	0,803
Pile 2	0,85	0,84

References

Authors

Metrics

Articles in this issue

DOI: https://doi.org/10.2478/sgem-2024-0010 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365

Journal RSS Feed

Language: English

Page range: 164 - 175

Published on: Jun 22, 2024

Published by: Wroclaw University of Science and Technology

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

pile–soil interaction,

skin resistance, pile-bearing capacity,

load–settlement curve

Related subjects:

Physics,

Mechanics and fluid dynamics

© 2024 Paweł Siemaszko, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 46 (2024): Issue 3 (September 2024)

Pile–Soil Interaction during Static Load Test

Figures & Tables

Figure 1:

Figure 2:

Figure 3:

Figure 4:

Figure 5:

Figure 6:

Figure 7:

Figure 8:

Figure 9:

Figure 10:

Figure 11:

Figure 12:

Figure 13:

Figure 14:

Load–settlement values obtained from the static load test; Pile Heyki 1_

Load–settlement values obtained from static load test for Pile Heyki 2_

Geotechnical parameters of the soil profile [27]_

Equation (42) results, left side and right side_

Paradigm

My account