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A treatment method for rapid sealing of top water when water-stopping failure occurs in expansion joints of gravity dams

A treatment method and technology of expansion joints, applied in water conservancy projects, marine engineering, construction, etc., can solve problems such as rapid sealing of invalid top water, water-stop damage of gravity dam expansion joints, etc., and achieve low-loss rapid repair projects and removal projects Hidden dangers, the effect of solving engineering problems

Active Publication Date: 2016-09-14
吉林省银河水利水电新技术设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a treatment method for quickly closing the top water when the gravity dam expansion joint fails to stop the water, so as to solve the problem of the gravity dam expansion joint water-stop damage

Method used

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  • A treatment method for rapid sealing of top water when water-stopping failure occurs in expansion joints of gravity dams
  • A treatment method for rapid sealing of top water when water-stopping failure occurs in expansion joints of gravity dams
  • A treatment method for rapid sealing of top water when water-stopping failure occurs in expansion joints of gravity dams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Include the following steps:

[0036] 1. Drilling and testing seepage conditions

[0037] 1. Drilling

[0038] In the direction of the water-facing surface of the dam 4, and 30 cm before the original expansion joint waterstop 1, a hole 3 is drilled downward along the expansion joint 2. The diameter of the hole is 90 mm. The principle of drilling holes and grouting is to facilitate the drilling depth. 5 in 50 cm;

[0039] 2. Test the seepage water in the hole

[0040] Test with a flow meter or a long round wooden rod. The diameter of the wooden rod should be slightly larger than the width of the expansion joint. When there is a large seepage flow, the wooden rod will be affected by the seepage pressure and its movement will be affected. s position;

[0041] 2. Expansion joint closure

[0042] 1. Adopt auxiliary seepage reduction measures

[0043] When the seepage water is serious, it means that the expansion joints are seriously damaged and cannot be directly block...

Embodiment 2

[0065] Include the following steps:

[0066] 1. Drilling and testing seepage conditions

[0067] 1. Drilling

[0068] In the direction of the water-facing surface of the dam 4, and 40 cm in front of the original expansion joint waterstop 1, drill a hole 3 downward along the expansion joint 2, with a diameter of 100 mm, in order to facilitate drilling and grouting, and the drilling depth is to go deep into the structural foundation 5 in 75 cm;

[0069] 2. Test the seepage water in the hole

[0070] Test with a flow meter or a long round wooden rod. The diameter of the wooden rod should be slightly larger than the width of the expansion joint. When there is a large seepage flow, the wooden rod will be affected by the seepage pressure and its movement will be affected. s position;

[0071] 2. Expansion joint closure

[0072] 1. Adopt auxiliary seepage reduction measures

[0073] When the seepage water is serious, it means that the expansion joints are seriously damaged and ...

Embodiment 3

[0093] Include the following steps:

[0094] 1. Drilling and testing seepage conditions

[0095] 1. Drilling

[0096] In the direction of the water-facing surface of the dam 4, and 50 centimeters in front of the original expansion joint waterstop 1, a hole 3 is drilled downward along the expansion joint 2. The diameter of the hole is 109 mm. The principle is to facilitate drilling and grouting, and the depth of the drilling is to go deep into the structural foundation. 5 in 100 cm;

[0097] 2. Test the seepage water in the hole

[0098] Test with a flow meter or a long round wooden rod. The diameter of the wooden rod should be slightly larger than the width of the expansion joint. When there is a large seepage flow, the wooden rod will be affected by the seepage pressure and its movement will be affected. s position;

[0099] 2. Expansion joint closure

[0100] 1. Adopt auxiliary seepage reduction measures

[0101] When the seepage water is serious, it means that the exp...

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Abstract

The invention relates to a gravity dam telescopic joint water stop failure backwater fast closing treating method and belongs to the telescopic joint backwater closing treatment of gravity water blocking building structures of the water conservancy project. The method includes drilling, testing the seepage condition, adopting the auxiliary seepage reducing measure, placing a mechanical grouting pipe and a concrete grouting pipe, first injecting a quick condensing high expansion polyurethane grouting material, and then injecting a special anti-scouring cement base material to close a drilling port and complete the grouting process. The method has the advantages of being capable of quickly treating water leakage caused by telescopic joint water stop damage, capable of achieving water carrying operation, not required to empty a reservoir or not affecting normal water reservation and capable of quickly repairing the damaged water stop by using the material characteristics and the seepage water pressure to achieve low-loss quick repair engineering and remove engineering hidden hazards, greatly saving engineering investment, saving water resources, quickly solving the engineering problems without affecting normal operation of the engineering.

Description

technical field [0001] The invention belongs to a sealing treatment method for top water in expansion joints of a hydraulic gravity type water retaining building structure. Background technique [0002] Concrete or masonry gravity dams and expansion joints of similar high-heavy structures are effective in water sealing, which is one of the keys to the normal operation of the project. Generally speaking, water leakage after expansion joints fail to stop water will bring burdens to project operation at least, and affect the safety of project operation at worst. Due to the long operation time of the project, the aging of the expansion joint water seal, or the failure of the expansion joint water seal seal due to various conditions such as the subsidence and deformation of the engineering structure, the project operation is affected. [0003] Since such expansion joints are all inside the dam body or structure body, the failure of the water stop will lead to pressure head of wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/16
Inventor 郑铎张慧莉杨金良周继元
Owner 吉林省银河水利水电新技术设计有限公司
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