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THE COMPARATIVE ANALYSIS OF METHOD OF CALCULATION OF THE PILES ON THE NORMS OF REPUBLIC OF BELARUS AND EUROCODE 7 «GEOTECHNICAL DESIGN»

Journal: Academic Journal "Industrial Machine Building, Civil Engineering" (Vol.3, No. 45)

Publication Date:

Authors : ; ;

Page : 172-183

Keywords : pile designed from static load test results; pile foundation designed from soil test profile; driven pile; bored pile; pile compressive resistance.;

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Abstract

It is provided comparative analysis methods for determining of calculations pile compressive resistance for pile designed from static load test results and pile foundation designed from soil test profile according to the existing normative documents of the Republic of Belarus and EUROCODE 7 «Geotechnical design» (part 1). The EN Eurocodes are a set of European standards which provide common rules for the design of construction works, to check their strength and stability. Limit states (which include ultimate limit states GEO, STR and others ultimate and serviceability limit states) should be verified by one or a combination of: use of calculations, adoption of prescriptive measures, experimental models and load tests, an observational method. This expression applies to the following ultimate limit states GEO: «Failure or excessive deformation of the ground, in which the strength of soil or rock is significant in providing resistance», STR: «Internal failure or excessive deformation of the structure or structural elements … in which the strength of structural materials is significant in providing resistance». According to Eurocode 7 the manner in which equations [for GEO/STR] are applied shall be determined using one of three Design Approaches. Design Approaches apply only to STR and GEO limit states. In Design Approach 1, factors are applied to actions alone (in Combination 1) and mainly to material factors (in Combination 2). In Design Approach 2, factors are applied to actions (or effects of actions) and to resistances simultaneously. Usually, the design values of the strength and stiffness are upper values, which is a more conservative approach. This article describes two procedures for obtaining the characteristic compressive resistance of a pile: а) directly from static pile load tests, b) by calculation from profiles of ground test results. In the case of procedures a) and b) Eurocode 7 provides correlation factors to convert the measured pile resistances or pile resistances calculated from profiles of test results into characteristic resistances. It is revealed and generalized similarities and distinctions method of calculation for piles design according to the European and national norms. This is design involves determining the number of piles to support the building. The number of piles is to be determined on the basis of static pile load tests and from soil test profile. The difference of the received values is defined design value in percent relation pile resistances, the number of piles.

Last modified: 2016-07-25 20:30:13