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Evacuation treatment method of concrete face rockfill dam

A technology for concrete panels and treatment methods, applied in the field of polymers, can solve the problems of difficult control of grouting pressure, damage to the integrity of panels, and poor fluidity of grout, so as to save money and construction period, not easy to damage, increase toughness and impermeability Effect

Active Publication Date: 2020-06-12
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the hollowing treatment of face-face dams in the past, the cement-fly ash stable slurry composed of cement and fly ash mixture was often used for filling and grouting treatment. There were problems such as large grouting holes, damage to the integrity of the panel, difficulty in controlling the grouting pressure, and flow of the slurry. Poor performance, need a certain curing time, grout solidification shrinkage and other disadvantages, when the hollow part is large, cement fly ash grouting, the grouting treatment part may still have a large deformation in the later stage

Method used

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  • Evacuation treatment method of concrete face rockfill dam

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Experimental program
Comparison scheme
Effect test

Embodiment

[0040] A method for treating voiding of the extruded side wall of a concrete face rockfill dam comprises the following steps:

[0041] 1) Using geological radar to carry out non-destructive detection of the voiding of the squeezed side wall of a concrete face rockfill dam; the effect of geological radar in the detection of the voiding of the squeezed side wall of a face rockfill dam is obvious, and it can realize the advantages of non-destructive, fast, and visible , the void depth can be accurate to 2-3cm; through testing, many defects are found, the length of the defect is 1-3m, and the transverse width is small;

[0042] 2) Drill grouting holes on the extruded side wall with voids, the hole diameter is 2cm, and the distance between adjacent grouting holes is 20-50cm;

[0043] 3) Inject high polymer material into the void of the extruded side wall through the grouting hole. During the injection process, gradually lift the grouting pipe upward from the bottom of the grouting ...

Embodiment 2

[0046] The concrete face rockfill dam construction period face void treatment method includes the following steps:

[0047] 1) After the construction of the face dam is completed, and before the dam is impounded, infrared thermal imaging and geological radar scanning are used for general surveys. Panel non-destructive void recognition for detailed inspection of defect locations;

[0048] 2) Drill grouting holes on the concrete panels with voids, the hole diameter is 2cm, and the distance between adjacent grouting holes is 20-50cm;

[0049] 3) Inject high polymer material into the void through the grouting hole. The grouting pressure is subject to the panel not being lifted. During the injection process, the grouting pipe is gradually lifted from the bottom of the grouting hole, and the grout is filled from bottom to top. The void area is filled and solidified and cemented together with the surrounding dam body through volume expansion to form a high polymer grouting composite...

Embodiment 3

[0052] The concrete face rockfill dam face void treatment method during the operation period includes the following steps:

[0053] 1) Infrared thermal imaging and geological radar scanning general survey, in which infrared thermal imaging is surface surveying, ground radar scanning is surveying line surveying, ground radar detection and ultrasonic shear wave reflection method are used for non-destructive and void recognition of panels for detailed inspection of defect positions;

[0054] 2) Drill grouting holes on the concrete panels with voids, the hole diameter is 3cm, and the distance between adjacent grouting holes is 20-50cm;

[0055] 3) Inject high polymer material into the void through the grouting hole. The grouting pressure is subject to the panel not being lifted. During the injection process, the grouting pipe is gradually lifted from the bottom of the grouting hole, and the grout is filled from bottom to top. The void area is filled and solidified and cemented tog...

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Abstract

The invention discloses a method for treating a concrete face rockfill dam void. The method includes the specific steps that (1), non-destructive testing of a void situation of the concrete face rockfill dam is carried out; (2), grouting holes are drilled in a void area with a diameter of 2-5 cm, and the distance between the adjacent grouting holes is 20-50 cm; (3) a high polymer material is injected into the void area through the grouting holes; and (4) at least one method of infrared thermal imaging, ground penetrating radar and a sound wave reflection method is used for evaluating the performance of the treatment location of the concrete face rockfill dam and determining the grouting effect, grouting is stopped if requirements are met, and if the requirements are not met, the grouting need to be supplemented to meet the requirements, and the void treatment is completed. According to the method, rapid and non-destructive treatment of the concrete face rockfill dam void area can be realized, and the void area can be used for an extrusion side wall void area, a concrete face rockfill dam construction period face slab void area, a concrete face rockfill dam operation period face slab void area, a dam top wave-proof wall bottom void area and a dam top concrete pavement bottom void area, and the range application is wide.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering, and relates to a hollow-out treatment method for concrete face rockfill dams and a polymer used for empty-out treatment. Background technique [0002] Concrete face rockfill dam (referred to as "face rockfill dam") is a water retaining dam with a roller compacted rockfill body as the supporting structure and a concrete face plate on the upstream surface as the anti-seepage body. It has the advantages of simple structure, convenient construction, and outstanding economic efficiency. It is a dam type widely used in water conservancy and hydropower engineering construction. At present, the dam height of the face rockfill dam has been developed to 200m, and it is developing towards a higher dam height. [0003] The void area of ​​the concrete face dam is mainly the void area of ​​the extrusion side wall, the void area of ​​the face face during the construction pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B7/06C08L75/08C08L23/12C08K5/12C08G18/66C08G18/48C08G18/58C08G18/32
CPCC08G18/3206C08G18/324C08G18/3281C08G18/4045C08G18/48C08G18/4804C08G18/58C08G18/6677C08G18/6685C08G18/6688C08K2201/004C08L75/08E02B7/06C08L23/12C08K5/12
Inventor 余挺杨星窦向贤张顺高何兰王晓东王观琪索慧敏姜媛媛
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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