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Method for detecting shearing strength of interlayer bonding surface of rock filled concrete of constructional engineering

A technology of rockfill concrete and interlayer bonding, which is applied in the direction of applying stable shear force to test the strength of materials, etc. The test process is simple, easy to move, and the effect of improving the test accuracy

Inactive Publication Date: 2015-07-01
广西壮族自治区水利科学研究院
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  • Application Information

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Problems solved by technology

[0003] The commonly used test method for the shear strength of hydraulic concrete is SL352-2006. The "Hydraulic Concrete Test Regulations" recommends using a concrete shear tester to measure the shear strength of concrete and the interface between concrete and other materials, but this method can only be used indoors. Test, generally only for small size test pieces
However, the minimum particle size used for the coarse aggregate of rockfill concrete is not less than 300 mm, and the length, width and height of the specimen required for the shear test are not less than 900 mm. Testing the Shear Strength of Rockfill Concrete

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  • Method for detecting shearing strength of interlayer bonding surface of rock filled concrete of constructional engineering

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Embodiment 1

[0030] A method for detecting the shear strength of the joint surface between layers of rock-fill concrete in construction engineering. Five test pieces are made on the rock-fill concrete dam or rock-fill concrete foundation to be tested. The test pieces are 1000mm long, 1000mm wide and 1000mm high 1000mm rock-fill concrete test piece, the test piece includes the interlayer bonding site of the rock-fill concrete dam. Four dial gauges are installed symmetrically in the horizontal and vertical directions of each test piece to detect the horizontal deformation and vertical deformation of the test piece respectively. Jacks are respectively installed on the horizontal plane and the vertical plane of the test specimen to apply the load in the horizontal direction and the load in the vertical direction. The vertical load is applied step by step, and the loading is controlled by time, and the loading is performed every 3 minutes. After loading, the reading is taken immediately, and th...

Embodiment 2

[0037] A method for detecting the shear strength of the joint surface between layers of rock-fill concrete in construction engineering. Six test pieces are made on the rock-fill concrete dam or rock-fill concrete foundation to be tested. The test pieces are 1200mm long, 1200mm wide, and 1200mm rock-fill concrete test piece, the test piece includes the interlayer bonding site of the rock-fill concrete dam. Four dial gauges are installed symmetrically in the horizontal and vertical directions of each test piece to detect the horizontal deformation and vertical deformation of the test piece respectively. Jacks are respectively installed on the horizontal plane and the vertical plane of the test specimen to apply the load in the horizontal direction and the load in the vertical direction. The vertical load is applied step by step, and the loading is controlled by time, every 5 minutes, and the reading is taken immediately after loading, and the next level of load can be applied. ...

Embodiment 3

[0043]A method for detecting the shear strength of the interlayer bonded surface of rock-fill concrete in construction engineering. Eight test pieces are made on the rock-fill concrete dam or rock-fill concrete foundation to be tested. The test pieces are 1300mm long, 1300mm wide, and 1300mm rock-fill concrete test piece, the test piece includes the interlayer bonding site of the rock-fill concrete dam. Four dial gauges are installed symmetrically in the horizontal and vertical directions of each test piece to detect the horizontal deformation and vertical deformation of the test piece respectively. Jacks are respectively installed on the horizontal plane and the vertical plane of the test specimen to apply the load in the horizontal direction and the load in the vertical direction. The vertical load is applied step by step, and the loading is controlled by time, and the loading is performed every 10 minutes. After loading, the reading is taken immediately, and the next level ...

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Abstract

The invention provides a method for detecting the shearing strength of an interlayer bonding surface of rock filled concrete of constructional engineering. After a test piece is manufactured through excavation in a rock filled concrete dam or foundation of the constructional engineering, vertical loading and horizontal loading are applied to the test piece gradually and respectively, the linear regression coefficient is determined according to the computational formulas of normal stress and shearing strength on a shearing surface, and the shearing strength of the interlayer bonding surface of the rock filled concrete dam can be calculated. According to the method, the test piece is excavated on a structural member entity, the test piece is subjected to shearing strength test by a jack, force applied to the test piece is pure shearing force, the concrete failure surface is consistent to the direction of the anti-shearing force, the influence factors in a testing process are reduced, the testing precision is improved and the testing process is simple and easy.

Description

technical field [0001] The invention belongs to the technical field of engineering construction, and relates to a method for detecting the shear strength of a joint surface between rockfill concrete dam layers. Background technique [0002] In projects such as hydropower dams, complex structures and foundations, rockfill concrete is used more and more widely as filling materials. Rock-fill concrete is a rock-fill concrete body formed by randomly filling self-compacting concrete in large-sized stones by utilizing the characteristics of high flow, good separation resistance and self-flow of self-compacting concrete. It has the characteristics of less cement consumption, small hydration temperature rise, low comprehensive cost, fast construction speed and good volume stability. Among them, the interlayer shear capacity has a significant influence on the performance of rockfill concrete, and is one of the main control indicators of construction quality. Therefore, in order to ...

Claims

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Application Information

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IPC IPC(8): G01N3/24
Inventor 陈建国郭晋川凌贤宗许现旭刘鲁强彭华娟周立新汪新凯
Owner 广西壮族自治区水利科学研究院
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