Square pile body concrete total cross section intensity examination method

Abstract

The invention relates to a square pile body concrete total cross section intensity examination method. The method comprises the following steps: one square pile in each batch of square piles is drawn, three standard test pieces with height side ratio of 1: 1 are cut in a square pile stirrup non-encryption zone, three standard test pieces are respectively performed with a compressive strength test, then a compressive strength mean value can be calculated; then subtraction is carried out from the compressive strength value of a certain standard test piece to the compressive strength mean value so that intensity range of the standard test piece can be obtained; if the ratio of absolute value of the intensity range for any standard test piece and the compressive strength mean value is less than 30%, the compressive strength mean value is taken as the compressive strength of the pile body concrete; if the ratio of absolute value of the intensity range for any standard test piece and the compressive strength mean value is greater than 30%, minimum compressive strength value is taken as the compressive strength of the pile body concrete. The method has the advantages of scientific material selection, simple process and reasonable method, simultaneously, the obtained concrete compressive strength accords with practical compressive strength of the square pile body concrete.

Description

technical field [0001] The invention relates to a method for testing the full-section strength of square pile concrete. Background technique [0002] The pretensioned prestressed concrete square pile refers to a slender hollow concrete prefabricated component made by pretensioning prestressing and centrifugal forming. This type of pile has the advantages of being suitable for large-scale industrial production, easy to guarantee quality, high bearing capacity of a single pile, strong adaptability to engineering site conditions, fast construction speed, and no pollution on site. Therefore, pretensioned prestressed concrete square piles are used in The application in engineering is more and more extensive. [0003] The concrete strength grade of the square pile body is generally C60 or C80. The construction of the square pile generally adopts the hammering method or the static pressure method. The two methods have extremely high requirements on the strength of the pile body. ...

AI Technical Summary

Problems solved by technology

[0003] The concrete strength grade of the square pile body is generally C60 or C80. The construction of the square pile generally adopts the hammering method or the static pressure method. The two methods have extremely high requirements on the strength of the pile body. During the construction process, it is easy to cause square pile cracking or pile explosion accidents

Since the compressive strength tested by the existing pile concrete compressive strength test method does not conform to the actual pile concrete compressive strength, when the square pile cracks or pile explosion accidents occur during the construction process, it often causes Disputes between the square pile manufacturer and the square pile construction unit on the compressive strength of the square pile body on site

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