Dam foundation deformation depth monitoring method

A technology of depth and dam foundation, which is applied in the field of dam foundation deformation depth monitoring to achieve the effect of reducing drilling depth and drilling process.
CN103821187AActive Publication Date: 2014-05-28POWER CHINA KUNMING ENG CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
POWER CHINA KUNMING ENG CORP LTD
Publication Date
2014-05-28

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Abstract

The invention provides a dam foundation deformation depth monitoring method. (1) three inverted plumb line measuring instruments of different depths are vertically and downwards arranged in a dam body observation room arranged at a dam foundation monitoring position, and the plumb line depths are between 10% and 15% of the dam height; (2) through the monitoring results of the inverted plumb lines of different depths on the dam foundation, a calculation model of plumb line depths and deformation is built, so that deformation of different depths of the dam foundation is calculated, and the theoretical maximum deformation of the dam foundation is calculated at the same time; (3) the ratio between the deformation of different depths of the dam foundation and the theoretical maximum deformation of the dam foundation is calculated, and when the ratio reaches 98%, the corresponding depth is the deformation depth of the dam foundation. The inverted plumb lines of different depths are arranged on the dam foundation, the calculation model of the plumb line depth and the deformation is built, and therefore the deformation depth of the dam foundation is calculated, and the problem that an instrument and method for monitoring dam foundation deformation depth do not exist is solved.
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Description

technical field

[0001] The invention relates to the technical field of hydropower engineering, in particular to a method for monitoring the deformation depth of a dam foundation. Background technique

[0002] In recent years, my country's hydropower development has been particularly rapid. A number of high dams represented by the Three Gorges Dam (dam height 181m), Jinsha River Xiluodu Arch Dam (dam height 285.5m), Lancang River Xiaowan Arch Dam (dam height 294.5m), etc. Large dams are being built one after another. With the continuous increase of dam height and water load, more and more attention is paid to the depth of action of the load generated by the dam impoundment on the dam foundation, that is, the deformation depth of the dam foundation.

[0003] According to the finite element calculation results, the deformation depth of the dam foundation is 2 to 3 times the height of the dam. For 200m or even 300m high dams, the depth of action can reach 600 to 1000m. Therefore,...

Claims

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