Concrete panel void repairing method

A technology of concrete slabs and voids, applied in dams, buildings, barrages, etc., can solve the problems of large investment and low construction efficiency, and achieve the effect of reducing project investment, reducing construction links, and good economy

Inactive Publication Date: 2015-09-16
POWERCHINA HUADONG ENG COPORATION LTD
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AI Technical Summary

Problems solved by technology

This method has low construction efficiency and high investment, and there are many uncertainties about whether the combination of the recast panel and the old panel is good.

Method used

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  • Concrete panel void repairing method
  • Concrete panel void repairing method

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Embodiment Construction

[0019] Such as figure 1 , figure 2 As shown, the dam surface of a concrete face rockfill dam consists of a transition layer 103, a cushion layer 102, and a face plate 101 from bottom to top. This embodiment provides a method for repairing voids in a concrete face face, and the steps are as follows:

[0020] a, void area detection: use LTD ground penetrating radar to detect the panel void area 104 below the panel 101, determine the panel void range, collect information such as the depth of void, and use it for scheme design decision-making; in addition, in The above determined panel void area 104 is subjected to drilling and coring inspection, and the above information is reviewed and corrected to obtain the final panel void area, void depth and other information.

[0021] b. Arrangement of 2 grouting holes: 2 grouting holes are arranged in the hollow area of ​​the panel, and several rows are arranged horizontally. The distance between grouting holes 2 in the same row is d1=2...

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Abstract

The invention relates to a concrete panel void repairing method. The purpose is to improve the efficiency of concrete anti-leakage panel void repairing and enhance the safety and reliability of engineering operation. According to the technical scheme, the method includes the steps that a, void region detection is performed, LTD ground penetrating radar is adopted for detecting a panel void region and determining the panel void region, and void depth information is collected; b, grouting hole positions are arranged inside the panel void region, the distance d1 between grouting holes is equal to 2 m-3 m, the row distance d2 is equal to 2 m-4 m, and quincunx-type arrangement or rectangular arrangement can be performed; c, drilling is performed according to the arrangement of the grouting hole positions; d, grouting starts to be performed upwards step by step from the lower portion of a panel in the grouting process; e, after two hours from grouting, cement mortar is adopted for plugging the grouting holes, the plugging height is larger than the height of the panel by about 3 mm-5 mm, and the surface of the panel is polished to be flat after standing for about 8 hours; f, in hot weather, water should be sprayed to the void repairing region for maintenance.

Description

technical field [0001] The invention relates to a method for repairing voids in concrete panels. It is suitable for concrete face rockfill dam face emptying treatment and other similar projects. Background technique [0002] Concrete face rockfill dam is a type of dam developed after the 1960s. Due to its good economy and convenient construction, it is widely used in the world. Currently, the world's highest Shuibuya concrete face anti-seepage The project (with a maximum dam height of 233m) was completed in 2011, and the Houziyan concrete face dam project with a maximum dam height of 223.5m is under construction. [0003] For high concrete face rockfill dams, due to construction defects, uneven deformation of the dam body and other factors can cause the void phenomenon of the face; It can cause hollowing out of the panels. In Zipingpu Hydropower Station under the action of the Wenchuan Earthquake in 2008, there was a serious phenomenon of hollowing out of panels. After th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/06E02D15/00
Inventor 王栋良周廷清王登银
Owner POWERCHINA HUADONG ENG COPORATION LTD
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