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Method for coating and sealing fracture of bed rock in uncovered heavy consolidation grouting

A technology of consolidated grouting and no cover weight, which is applied in water conservancy projects, sea area projects, construction, etc., can solve the problems of large engineering volume, cumbersome processing process, and poor results, and achieve high work efficiency, simple construction procedures, and grouting effects good effect

Inactive Publication Date: 2013-04-17
CHANGJIANG SURVEY PLANNING DESIGN & RES
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects of large engineering quantity, cumbersome processing process and poor effect in the existing rock mass consolidation grouting method, and provide a coverless grouting grouting method that is simple, fast, less disturbing, economical, safe and reliable. Bedrock Fissure Brushing Sealing Method in Grouting

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  • Method for coating and sealing fracture of bed rock in uncovered heavy consolidation grouting
  • Method for coating and sealing fracture of bed rock in uncovered heavy consolidation grouting
  • Method for coating and sealing fracture of bed rock in uncovered heavy consolidation grouting

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] For the foundation rock mass of the high arch dam of the Goupitan Hydropower Station, the method of brushing and sealing the foundation rock fissures in heavy consolidation grouting without cover is adopted, and the steps are as follows:

[0030] (1) Preliminary acceptance of the bedrock surface 1 of the dam excavation is carried out, and the rock mass properties and flatness of the bedrock surface 1 are required to meet the predetermined requirements. Wash the bedrock surface 1 with high-pressure water or wind, and use a steel brush to clean and remove impurities such as mud, grease, and dirt on the surface of the rock mass fissure 2 .

[0031] (2) 1h to 2h before formal painting, wet the bedrock surface 1 with spray water to ensure it is in a wet state.

[0032] Use a soft brush of architectural paint to paint cement-based p...

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Abstract

The invention discloses a method for coating and sealing a fracture of a bed rock in uncovered heavy consolidation grouting. The method comprises the steps of: firstly cleaning to remove impurities in the fracture of a rock body after the evenness of a base rock body to be grouted reaches to a design requirement; then coating a cement base waterproof material on the fracture of the rock body after keeping the surface of the rock body wet for 1-2 hours; checking an appearance effect of the coating layer after the final setting time of the cement base waterproof material arrives and coating the cement base waterproof material again on the places with empty holes or fractures; and then performing pressurized-water check, marking the fractures of the rock body with water seepage and water emission, and coating the cement base waterproof material again on the fractures of the rock body until the pressurized-water check shows that the fractures of the rock body have no water leakage. The method for coating and sealing the fracture of the bed rock in the uncovered heavy consolidation grouting, disclosed by the invention, not only overcomes the disadvantages of convenient fracture processing ways such as concrete sealing, spraying thin layer structure sealing, chisel groove and caulking sealing, and bare rock without sealing, and realizes a relative good consolidation grouting effect, but also has the characteristics of being convenient and rapid in construction, low in interference, economic, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of bedrock reinforcement treatment of hydraulic structures, in particular to a method of painting and sealing bedrock cracks in uncapped heavy consolidation grouting. Background technique [0002] With the acceleration of the development of hydropower projects, many projects have tried to adopt different forms of uncapped heavy consolidation grouting construction technology to solve the outstanding contradiction between the dam bedrock consolidation grouting and dam concrete pouring. [0003] Various uncapped heavy consolidation grouting techniques have their scope of application, and the difference is mainly in the form of crack sealing. At present, the crack treatment methods in heavy consolidation grouting without cover mainly include the following: ①Use concrete to seal the entire area of ​​the rock mass surface with a thickness of 30 to 50 cm; ②Spray 10 to 15 cm thick mortar or concrete and other thin l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/16
Inventor 徐年丰叶伟峰刘加龙邹德兵李洪斌卢增木郭志华于习军王汉辉
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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