Unit specialty of sewage tank deformation joint plugging company
company It is one of the few domestic comprehensive enterprises integrating the research, development and construction of the plugging technology for civil air defense projects. It has more than 20 years of construction experience. In recent years, it has introduced foreign advanced plugging technology and equipment for civil air defense projects, and constantly improved the plugging construction of civil air defense projects
Technology, we will serve you wholeheartedly.
Our company has Grade II professional contracting certificate for national high-rise structure engineering and anti-corrosion and thermal insulation aerial work engineering, and Grade I qualification certificate for aerial suspension work and anti-corrosion construction.
After more than 20 years of development, the company has become a comprehensive building anti-corrosion and aerial work enterprise integrating scientific research, design, development and construction, and has taken the lead in adopting the special aerial work process of no scaffolding and non-stop production in domestic aerial work.
At present, the company has 5 second level project managers (constructors), 11 third level project managers, 46 technical and economic management personnel, 219 construction personnel, including 16 people with intermediate professional titles. The company has four branches and eight engineering teams.
The company carried out construction and material supply in strict accordance with the technical requirements and specifications of the drawings, standardized the construction team in strict accordance with the provisions of the safety production law and civilized construction, and delivered satisfactory answers to the owner on quality, safety and civilized construction.
Related introduction:
Civil air defense engineering is an engineering building built to meet the needs of civil air defense command, communication, personnel and material shelter. The main works buried shallowly underground are usually affected by surface water and ground be launched Large impact, due to survey site selection, design construction and maintenance management
The leakage has become a major problem in the use and maintenance of civil air defense projects. This paper will talk about the leak stopping and seepage prevention methods of civil air defense engineering from the following six aspects.
1、 Principle of plugging and seepage prevention
The existing civil air defense works usually adopt four measures for waterproofing. One is to outsource the overall upstream waterproofing measures, the other is to achieve structural self waterproofing measures by improving the density of the structure's own media, and the third is to use the surface rigidity inside the project
Or flexible full face waterproof measures. Fourth, grouting (chemical grout or non chemical grout) is used to block the seepage channel to improve the compactness and stability of the surrounding media of the project.
Since the built civil air defense works are shallow buried underground and are wall mounted, it is usually impossible to dig the ground to make a waterproof layer again on the upstream surface. Therefore, for specific leakage situations, it is usually waterproof on the back surface. Rigid flexible combination and multi-layer are required
Waterproof and leakage blocking measures of fortification, key points treatment and full face sealing shall be strictly managed and carefully constructed to ensure the expected waterproof effect.
2、 Leakage cause analysis
Due to the limitations of engineering survey, structural design, construction quality and waterproof technology in that year, poor consideration of waterproof design, poor waterproof construction quality and other reasons, the waterproof quality of most civil air defense projects cannot meet the requirements, and some projects leak while building
To fail to pass the completion acceptance; In addition to the long-term erosion of external humid air, surface water and groundwater outside the structure and the long-term erosion of internal humid air, the resistance of the structure is reduced, which can no longer meet the requirements of structural self waterproofing. When the water level is low
When the force is small, the project will have small leakage. When the water level is high and the pressure is high, the project will have large leakage. Therefore, waterproof and leakage stoppage has become an important measure before and after the completion of civil air defense projects.
3、 Main forms of leakage
According to the surface shape of leakage, there are three main types of leakage in civil air defense works: point leakage, joint leakage and surface leakage; According to the amount of leakage, the leakage of civil air defense works can be divided into three forms: seepage, leakage and surge.
4、 Leak stopping and seepage prevention procedure
1. Special key waterproofing treatment (7 layers, about 3-5 cm thick, that is, basically buried flat to the original position) shall be carried out for wall pipes, wires, embedded parts, etc. with interface adhesives, quick setting materials, flexible expansion materials, rigid waterproof materials;
2. Use grouting method to filler Grouting waterproofing shall be carried out for the layer and leakage part;
3. Use interface adhesive, flexible waterproof material and rigid waterproof material to waterproof the inner surface of the pool wall (including 8 layers of flexible waterproof layer with a thickness of about 1cm and 10 layers of rigid waterproof layer with a thickness of about 3cm, which is basically flush with the original surface of the pool wall);
4. The inner surface of the pool wall shall be coated with interface adhesive and powdery waterproof material for waterproofing.
5. Use cleaning agent to clean and remove the water, alkali and dirt on the surface of the leakage area of civil air defense works;
6. Roughen, remove the mortar layer and concrete at hollows or honeycombs, and clean the dust to keep the interface clean (average chiseling depth is about 2-3 cm);
7. Before waterproofing special parts such as through wall pipes, wires and embedded parts door Cleaning (about 3-5 cm deep);
Unit specialty of sewage tank deformation joint plugging company
