Boring and coring process for roller compacted concrete

A technology of roller compacted concrete and drilling core, which is applied to sampling devices, material inspection products, etc., can solve the problems of length limitation, inability to meet the requirements of engineering quality, insufficient core depth, etc., to prevent mechanical damage, and to achieve economical Benefit, the effect of reducing friction

Active Publication Date: 2006-07-19
POWERCHINA HUADONG ENG COPORATION LTD +1
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  • Abstract
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Problems solved by technology

Because the length of the existing coring technology is limited, the depth of the core that can

Method used

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  • Boring and coring process for roller compacted concrete
  • Boring and coring process for roller compacted concrete
  • Boring and coring process for roller compacted concrete

Examples

Experimental program
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Embodiment Construction

[0021] As shown in Figures 1 to 13, this embodiment is implemented by the following steps:

[0022] a. Select and install the drilling rig 8 and the drilling tower 9: In this embodiment, the SGZ-IIIA drilling rig, the SGZ-3250 pump and the ordinary tripod drilling tower are selected for conventional drilling. The concrete core 3 is pulled out, and the core pipe 5 is lifted and placed by a crane to meet the requirements of lifting a long core and stability.

[0023] b. Using single-tube drilling tool 11 for concrete drilling: according to the coring requirements, this example uses a 150mm single-tube drilling tool to take cores, and the total length of the drilling tool is 10m; due to the requirements of the drilling process, the single-tube drilling tool 11 consists of four It is composed of a short core pipe 10 with a length of 2.5m and high thread concentricity at both ends, and the accumulative straightness deviation of the drilling tool does not exceed 5mm. At the same ti...

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Abstract

The invention relates to a roller compacted concrete coring craft. The single pipe drill tool is formed by butt jointing a plurality of short core pipes with the length 0.25-0.4m and higher two ends whorl concentricity, wherein the total length of the drill tool is 8m-10m; the drill tool accumulating line degree deviation id less than 5mm; it arranges a single moving stabilizer between two drill rod columns which has the same diameter with the drill tool; it arranges a bending apparatus before winding the opening after coring; it arranges an un-coring apparatus after coring which comprises the step of taking apart the rubber piston with interface length 20-30cm and the external diameter less than the inner diameter of core pipe and putting it on the core pipe of the concrete core upper part, fixing the joint and the glued joint, using the constancy of pump and fluid transmission to slowly press the concrete core out of the core pipe by the speed of 30cm/min.

Description

technical field [0001] The invention relates to a drilling and coring process for roller compacted concrete. In order to comprehensively evaluate the quality of the Rcc roller compacted concrete of the dam body of the hydropower station, the long core (single length ≥ 6m) is taken as one of the means to evaluate the quality of the concrete. Background technique [0002] At present, drilling coring technology is widely used in industries and departments such as geological exploration, engineering exploration, construction installation and engineering quality inspection. In the prior art, the conventional drilling process is generally adopted, and the length of a single core is generally not more than 2.5m. Because the length of the existing coring technology is limited, the depth of the rock core that can be detected is not enough, and it has been unable to meet people's requirements for engineering quality. Contents of the invention [0003] The technical problem to be s...

Claims

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Application Information

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IPC IPC(8): G01N33/38G01N1/08
Inventor 兰自营马继吉泽英蔡孝光郑志强李南吉徐金兰黄明福
Owner POWERCHINA HUADONG ENG COPORATION LTD
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