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Preparing and molding method for concrete in-situ direct shear test specimens

A technology of sample preparation and molding method, which is applied in the preparation of test samples, the use of stable shear force to test the strength of materials, sampling devices, etc., to reduce disturbance, improve cutting ability and labor productivity, and accurate sample size Effect

Inactive Publication Date: 2010-12-15
HUBEI GEZHOUBA TESTING
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for preparing concrete in-situ direct shear test specimens, which overcomes the defects of traditional manual methods and greatly improves the quality of concrete in-situ direct shear test specimens. The surface of the sample is smooth and flat, and the test can be carried out directly, which ensures the authenticity and accuracy of the test results, improves the efficiency of sample preparation, and reduces the construction cost

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  • Preparing and molding method for concrete in-situ direct shear test specimens
  • Preparing and molding method for concrete in-situ direct shear test specimens
  • Preparing and molding method for concrete in-situ direct shear test specimens

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Embodiment Construction

[0021] A method for preparing a concrete in-situ direct shear test sample, comprising the following steps:

[0022] a. On-site stakeout, stake out at the test site according to the technical requirements, mark the size of the sample 3, and determine the position of the cutting line according to the technical parameters. The cutting line consists of the contour line 1 of the four sides of the sample and the sample corresponding to the contour line 1 The outer contour line 4 of the peripheral concrete consists of four contour lines 1 and four corresponding outer contour lines 4;

[0023] Among the contour lines 1 of the four sides of the sample, a certain gap is guaranteed between the contour lines 1 of three sides and their corresponding outer contour lines 4 to form a shear seam 5, and the gap between the contour line 1 of the other side and its corresponding outer contour line 4 is due to It is necessary to install the shear loading jack 6, and there must be a relatively larg...

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Abstract

The invention relates to a preparing and molding method for concrete in-situ direct shear test specimens, which comprises the following steps: a. on-site lofting, arranging specimens on the testing site according to technical requirements, marking the sizes of the specimens, and fixing the location of a cutting line according to technical parameters; b. concrete cutting, carrying out nondestructive cutting on concrete according to the cutting line ensured by lofting; and c. periphery concrete rejecting, rejecting the periphery concrete on the periphery of the specimens by utilizing small-sized machines and tools to prepare the concrete in-situ direct shear test specimens. The invention overcomes the defects of the traditional manual method and greatly enhances the preparation quality of the concrete in-situ direct shear test specimens. The prepared specimens have smooth and flat surfaces and can be directly tested to ensure the reality and the accuracy of test results, increase the efficiency of specimen preparation and reduce construction cost.

Description

technical field [0001] The invention relates to a sample preparation and molding method, in particular to a concrete in-situ direct shear test sample preparation and molding method. Background technique [0002] In hydraulic concrete construction, in-situ direct shear tests of concrete are often required in order to test the shear resistance of concrete dam parts, evaluate the quality of concrete, and provide parameters for verifying the stability of the dam body against sliding. After completion, a concrete in-situ sample with a shear area of ​​not less than 500mm×500mm is fabricated in the on-site mass concrete. The height of the sample is determined according to the shear surface. Generally, the height of the concrete above the shear surface is slightly greater than 2 times the side length of the sample. / 3. The concrete in-situ direct shear sample needs to be separated from the surrounding mass concrete to form a shear joint. The traditional sample preparation method is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/04G01N3/24
Inventor 程雪军
Owner HUBEI GEZHOUBA TESTING
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