in
the respective row of the table.This mode enables you to determine the load-bearing capacity of a driven (production) friction pile subjected to compressive load based on the results of soil testing with a probe pile according to the requirements of Sec. 5.8, 5.10 of SNiP 2.02.03-85, KMK 2.02.03-98 (Sec. 7.3.8, 7.3.10 of SP 50-102-2003 or SP 24.13330.2011). If the selected design code is DBN B.2.1-10-2009, the analysis is performed according to the requirements of DSTU B B.2.1-27:2010.
A production pile is a pile commonly used in construction, of an appropriate material, size and design.
A probe pile is a standard compound steel pipe with a conical shoe and a friction sleeve; in compliance with GOST 5686-94, it must have the outer diameter of 127 mm.
Depending on the number of tests with a probe pile and on the variability of the particular values of the pile ultimate resistance in the probing locations, the safety factor for soil is varied. It is calculated by the application for the confidence level of 0.95 according to the requirements of GOST 20522-75.
Data for the analysis should be prepared beginning with specifying the number of soil tests. The "Particular values of ultimate resistance" table will display the respective number of rows.
The particular value of the ultimate resistance of the driven pile at
the probing location, Fu,
is calculated depending on the ultimate soil resistance under the probe
pile tip obtained by testing, average value of the ultimate resistance
of i-th layer
of soil on the side surface of the probe pile, dimensions of the production
pile cross-section, and properties of soil on the side surface. All these
data should be specified for each test in the dialog box that can be invoked
by clicking the button in
the respective row of the table.
As a rule, data obtained by a series of tests are rather close. To accelerate the input of data, the application allows to copy data from one test to another and then make necessary changes. To do it, click the Copy Data button and specify No. of the test to take the data from in the dialog box that opens.
The particular value of the ultimate resistance depends for each test on the depth of penetration of the pile tip and on the cross-section of the production pile. Therefore, as soon as these parameters are modified, particular values calculated earlier and entered into the table become incorrect and the table gets cleared. To recalculate all particular values, you can click the Calculate all particular values button.
The analysis is performed by clicking the Calculate button. The result of this calculation (load-bearing capacity of the pile) is displayed on the Results tab.