Method for identifying cross joint state during arch dam construction period

An identification method and technology of transverse joints, which can be used in water conservancy projects, marine engineering, measuring devices, etc., and can solve the problems of complex structural stress and lack of clear and unified methods.

Active Publication Date: 2012-07-18
TSINGHUA UNIV +1
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  • Description
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Problems solved by technology

2. The structure is complex
However, there is currently no clear and unified method for identifying the behavior of transverse joints based on monitoring data, and the spe...

Method used

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  • Method for identifying cross joint state during arch dam construction period
  • Method for identifying cross joint state during arch dam construction period
  • Method for identifying cross joint state during arch dam construction period

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Embodiment approach

[0037] Based on the prior art, the invention realizes the identification of the behavior of the transverse joints during the construction period of the arch dam by arranging instruments and formulating relevant criteria. The specific method can be implemented as follows:

[0038] 1) During the construction period, a transverse joint gauge 2 is deployed at the transverse joint 3 to obtain the monitoring value of the opening degree of the transverse joint 3 in real time, and the collected data and information on the grouting time of each grouting area are input to the data processing unit, and the transverse joint is measured The layout of meter 2 is as follows:

[0039] a) In the vertical direction, arrange transverse seam gauges in 4 irrigation areas or at intervals of 1 to 2 irrigation areas;

[0040] b) In the direction of the transverse river, install transverse joint gauges at all or at least half of the transverse joints 3;

[0041] c) Along the direction of the river, ...

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Abstract

A method for identifying the cross joint state during an arch dam construction period is a method which adopts an opening monitoring value of a cross joint meter to identify the cross joint state during the arch dam construction period according to a series of criterions, and relates to the technical guidance of arch dam cross joint construction. According to the method, all criterion threshold values are preset according to engineering data statistical analysis, engineering experience and the like, the cross joint meter is used to monitor the opening of a cross joint in real time, and the correlation indexes are calculated according to the criterions for identifying the cross joint state. The method has the characteristics of simple and easily understood criterions, accurate judging and simplicity for operation, has an obvious effect on real-timely and accurately mastering the cross joint real working state during the arc dam construction period, and can provide effective basis for opportunity selection, cross joint surface treatment and other strategies when grouting is carried out.

Description

technical field [0001] The invention relates to an identification method for the working behavior of transverse joints during the construction period of an arch dam, and relates to the field of technical guidance for the construction of transverse joints of concrete dams. Background technique [0002] The transverse joints set perpendicular to the dam axis can meet the needs of subsidence during the construction period by separating the dam body to adapt to the terrain and geological changes of the valley where it is located; reserve space to adapt to the expansion of the dam section caused by the temperature rise and temperature changes during pouring of concrete; Increase the heat dissipation surface to facilitate heat dissipation to meet the need to prevent cracking; pour in sections and blocks to meet construction needs. During construction, it is necessary to lay out keyways layer by layer on the transverse joint surface to meet the needs of shear force. At an appropri...

Claims

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Application Information

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IPC IPC(8): G01N19/08G01B21/02E02B3/16
Inventor 胡昱李庆斌林鹏罗丹旎周绍武汪志林左正
Owner TSINGHUA UNIV
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