A method for testing the full-section strength of tubular pile concrete

Abstract

The invention relates to a tube pile body concrete total cross section intensity examination method. The method comprises the following steps: one tube pile in each batch of square piles is drawn, three standard test pieces with height diameter ratio of 1: 1 are cut in a tube 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 tube pile body concrete.

Description

technical field [0001] The invention relates to a method for testing the strength of the concrete full section of a pipe pile body. Background technique [0002] The pretensioned prestressed concrete pipe 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. The application in engineering is more and more extensive. [0003] The concrete strength grade of the pipe pile body is generally C60 or C80. The construction of the pipe pile generally adopts the hammering method or the static pressure method. The two methods have extremely high requirements on the strength of the pipe pile body. If the strength of the pipe pile body is insufficient, Duri...

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Problems solved by technology

[0003] The concrete strength grade of the pipe pile body is generally C60 or C80. At present, the construction of the pipe pile generally adopts the hammering method or the static pressure method. The two methods have extremely high requirements on the strength of the pipe pile body. If the strength of the pipe pile body is insufficient, During the construction process, it is easy to cause pipe 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 a pipe pile cracks or a pile burst accident occurs during the construction process, it will often cause Disputes between pipe pile manufacturers and pipe pile construction units on the compressive strength of pipe piles on site

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