Characteristics of water conservancy and hydropower engineering construction?
1, which is greatly influenced by water flow. When constructing on the river, in order to carry out the construction smoothly, the water flow must be properly controlled.
2. It is greatly influenced by topography, geology, hydrology and meteorological conditions. The construction of water conservancy and hydropower projects is mostly carried out in the open air under complex terrain and geological conditions. In order to avoid climate interference affecting the construction progress and quality, corresponding guarantee measures should be taken.
3. Quality and safety issues are outstanding. The construction of water conservancy and hydropower projects has high one-time investment and long service life, which is related to the property storage safety of millions of people downstream of water retaining structures. Inferior projects will bring irreparable losses to the national economy. Therefore, the quality of a century-long plan is by no means a slogan.
4. There are many hidden dangers in construction. The construction of water conservancy and hydropower projects often needs blasting operation, underground operation, above-water and underwater operation and aerial operation. This kind of construction often needs to be carried out in parallel or cross, which will pose a certain threat to the construction safety, and reliable preventive measures must be taken.
5. There are many temporary auxiliary facilities, so the preparation before construction is very important. Water conservancy and hydropower projects are often built in valley areas, and the traffic is inconvenient. Before construction, it is often necessary to build traffic roads inside and outside the construction site and office and living rooms for auxiliary enterprises serving the construction. The workload of facilities other than these projects is often large, so we must pay full attention to them to meet the construction requirements and reduce the project investment.
6. The construction organization is complicated. There are many single buildings in the hub, with centralized layout, large engineering quantity and many types of work. Construction is often limited by terrain conditions and easily disturbed. Therefore, the organization and management of site construction is very important. It is required to apply the principle of system engineering in construction and choose the best construction scheme according to the time and place.
7. The benefits involve multiple departments. Flood control, power generation, shipping, irrigation, fishery, industrial and urban water use should be considered as a whole and arranged properly, which increases the complexity of construction.
Construction technology of water conservancy and hydropower projects?
1, mass concrete construction technology
Water conservancy and hydropower project is a huge project, which needs to bear greater water storage pressure during use, and the bearing capacity of components is also facing higher requirements. In order to meet the above requirements, the construction unit must adopt mass concrete construction technology to provide effective guarantee for the smooth construction and normal operation of water conservancy and hydropower projects. Mass concrete construction technology is a new technology in the construction of water conservancy and hydropower projects, and many problems need to be paid attention to. Once handled carelessly, it will seriously affect the quality of water conservancy and hydropower projects.
In the process of mass concrete construction, splash occurs, which is a manifestation of endothermic reaction. Therefore, the construction unit should pay attention to the control of construction temperature, especially the temperature difference between inside and outside, which must be controlled within a reasonable range to ensure the effective implementation of water conservancy and hydropower projects. In addition, controlling the temperature difference between inside and outside can improve the overall quality of water conservancy and hydropower projects and the quality of final components, which the construction unit should pay attention to.
2. Cofferdam technology in water conservancy facilities
In the construction of ordinary water conservancy and hydropower engineering buildings, the problem of upstream water supply must be considered. Therefore, in order to effectively deal with the problem of water inflow from upstream rivers, targeted measures have been taken. For example, the choice of cofferdam successfully introduced the upstream water flow into the water conservancy project, adjusted the inflow direction of the river, and built a foundation pit to maintain the normal construction of the downstream water conservancy facilities when the upstream flow direction changed.
The above-mentioned cofferdam technology for water conservancy facilities is mainly used to accurately calculate the water flow and obtain the appropriate water flow environment analysis. After comprehensively considering all the mechanical equipment and materials involved in this scheme, an efficient cofferdam scheme is put forward. Before the start of water conservancy and hydropower construction, it is required to pre-estimate the upstream inflow and take corresponding preparatory measures, which can enhance the emergency resolution ability of the construction party to deal with emergencies and finally ensure the smooth development of the whole water conservancy and hydropower construction project.
3. Dam filling construction technology
In water conservancy and hydropower construction technology, dam filling technology plays an important role, which can effectively solve various problems in dam surface water flow operation. The author summarizes his years of work experience and thinks that the dam filling technology of water conservancy and hydropower projects mainly involves the following aspects in the application process.
When determining the direction of water flow on the dam surface, we should start from the actual area of the dam, and not only that, but also consider the operation requirements of related machinery and equipment. From the aspect of width, the mechanical energy width of staggered compaction must be satisfied, which is generally10 ~ 20m; In terms of length, it should meet the requirements of rolling machinery operation, that is, 40 ~100m; In the process of determining the dam filling technology, we should start with the operation content. The specific factors affecting the technology are construction intensity, filling area, construction season and auxiliary materials.
Precise control of operation time. Due to the particularity of winter and summer, in order to reduce heat loss, the operation cycle time can be shortened to the limit; At the end of the flow process, determine the number of processes and the time of operation units in time, and do a good job of unloading and leveling.
What are the characteristics of water conservancy and hydropower engineering construction? The related contents are introduced, which can make up for some losses of national economy, make up for some hidden dangers in construction, and build different roads and other projects. The construction technology of water conservancy and hydropower project also includes many contents, and it is an advanced engineering project, which can make many significant contributions to the national water conservancy and electric power.