Determination of the bearing capacity of driven piles by static probing with penetrometers equipped with a special friction sleeve

Autor: G. S. Rodkevich, L. G. Mariupol'skii, V. E. Ses'kov
Rok vydání: 1986
Předmět:
Zdroj: Soil Mechanics and Foundation Engineering. 23:7-10
ISSN: 1573-9279
0038-0741
DOI: 10.1007/bf01743389
Popis: In recent years, penetrometers with friction sleeves (type II and III penetrometers in accordance with GOST 20069-81) have come into increasingly widespread use in the USSR and abroad for investigating soils by static probing [i]. Determination of the bearing capacity of driven piles from the results of such probing by the method set forth in Construction Rule and Regulation II-17-77 [2], however, frequently leads to significant deviations in computed bearing capacities from experimental values. This is confirmed by results of a comparison made by the authors between the ultimate strength B of piles as computed in accordance with [2] and standard ultimate-strength values B e obtained on the basis of data from static pile tests for a pile settlement of 16 mm (0.2 of the ultimate allowable average foundation settlement of 8 cm). The comparison was made for 75 concurrent tests conducted in sandy and silty-clayey soils in Quaternary deposits. The depth h of pile embedment was varied from 2.2 to 12.5 m; the cross section varied from 15x15 to 35x35 cm; the specific resistance of the soil under the tip of the probe q ranged from 0.2 to 40 MPa, the specific resistance of the soil on the lateral surface of the probe f ranged from 0.002 to 0.5 MPa; the ultimate strength B e varied from 120 to 1170 kN.
Databáze: OpenAIRE
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