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A water-filled flexible sealing method for hydraulic concrete expansion joints

A technology of hydraulic concrete and expansion joints, which is applied in water conservancy projects, sea area engineering, construction, etc., and can solve problems such as large external water pressure and difficult and unaffordable sealing joints with water

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

[0008] The invention provides a water-filled flexible seam sealing method for hydraulic concrete expansion joints, in order to solve the existing problems that water-sealing joints are difficult to realize and cannot bear large external water pressure

Method used

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  • A water-filled flexible sealing method for hydraulic concrete expansion joints
  • A water-filled flexible sealing method for hydraulic concrete expansion joints
  • A water-filled flexible sealing method for hydraulic concrete expansion joints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Include the following steps:

[0098] (1) Use wooden wedges to embed expansion joints to preliminarily prevent large-scale water leakage, and then cut the surface flat;

[0099] (2) Open a deep hole at the bottom of the expansion joint for water diversion, and try to lead the leaking water out of the hole, or pre-embed a drainage pipe with a valve for drainage;

[0100] (3) Drill holes at the place where the leakage continues and inject a chemical plugging agent to basically seal the leakage; if there is still a slight leakage, a cement-based quick plugging agent can be used to temporarily plug it, so that the treatment can be achieved in a short time There is no clear water in the incision area, and a temporary water stop is completed;

[0101] The chemical plugging agent: polyurethane PU grouting anti-leakage glue, with a setting time of 2 minutes, purchased from the building materials market;

[0102] Cement-based quick plugging agent: setting time is 3 minutes, pu...

Embodiment 2

[0172] Include the following steps:

[0173] (1) Use wooden wedges to embed expansion joints to preliminarily prevent large-scale water leakage, and then cut the surface flat;

[0174] (2) Open a deep hole at the bottom of the expansion joint for water diversion, and try to lead the leaking water out of the hole, or pre-embed a drainage pipe with a valve for drainage;

[0175] (3) Drill holes at the place where the leakage continues and inject a chemical plugging agent to basically seal the leakage; if there is still a slight leakage, a cement-based quick plugging agent can be used to temporarily plug it, so that the treatment can be achieved in a short time There is no clear water in the incision area, and a temporary water stop is completed;

[0176] The chemical plugging agent: polyurethane PU grouting anti-leakage glue, with a setting time of 6 minutes, purchased from the building materials market;

[0177] Cement-based quick plugging agent: setting time is 9 minutes, pu...

Embodiment 3

[0248] Include the following steps:

[0249] (1) Use wooden wedges to embed expansion joints to preliminarily prevent large-scale water leakage, and then cut the surface flat;

[0250] (2) Open a deep hole at the bottom of the expansion joint for water diversion, and try to lead the leaking water out of the hole, or pre-embed a drainage pipe with a valve for drainage;

[0251] (3) Drill holes at the place where the leakage continues and inject a chemical plugging agent to basically seal the leakage; if there is still a slight leakage, a cement-based quick plugging agent can be used to temporarily plug it, so that the treatment can be achieved in a short time There is no clear water in the incision area, and a temporary water stop is completed;

[0252] The chemical plugging agent: polyurethane PU grouting anti-leakage glue, with a setting time of 10 minutes, purchased from the building materials market;

[0253] Cement-based quick plugging agent: setting time 15 minutes, pur...

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PUM

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Abstract

The invention relates to a flexible seam sealing method for water of a hydraulic concrete expansion joint, which belongs to a seam sealing method for the hydraulic concrete expansion joint resistant to outer water seepage pressure and temperature shrinkage. Water leakage is prevented initially, a hole is opened for water diversion, the water leakage is blocked off basically, temporary water stop is completed, an embedded type joint cutting processing mode or a superficial direct anchoring type processing mode is adopted, the initial setting time of the joint material is 3 hours, the concretion time is 25 to 30 days, a brake valve is closed, and the treatment is over. The advantages are that: the problem that leakage is caused as the width of the expansion joint changes with the change of temperature is solved, as the expansion joint is sealed by a flexible material, the expansion joint water stop can change with the temperature, and does not influence the water stop effect; construction in a moist environment or even the construction with water can be conducted. The investment is saved. As damages do not exist, and are low or tiny, the workload is small, the project operation is not influenced, and the project investment is saved obviously.

Description

technical field [0001] The invention belongs to a seam sealing method for hydraulic concrete expansion joints resistant to external seepage water pressure and temperature shrinkage. Background technique [0002] Expansion joints are often damaged due to temperature changes. For expansion joints with external water seepage, this situation often leads to abnormal operation of the project. For example, after the water seal of the expansion joints of the hydropower station is damaged, the pressure water will flow out along the expansion joints, causing water filling in the underwater powerhouse or generator room, directly affecting the normal operation of the generator. Moreover, as the temperature changes, the crack width also changes. Due to the external water pressure, it is extremely difficult to achieve effective sealing by conventional methods. [0003] In another case, the concrete structure has cracks due to some reason, and a large leakage occurs under the action of pr...

Claims

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Application Information

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