Development and construction process of large ground power station
1. Preliminary investigation stage of the project
Conduct a thorough investigation of the project land (and its surrounding) resources, power grid conditions, and local policies. I divide the site selection work into three steps, as shown in the table below:
1. Preparatory work before going to the site
The sites of power stations are generally located in relatively remote places, and it often takes a lot of time and labor to go to the site. Therefore, you must make preparations before you go. First of all, it is necessary to have a simple communication with the owner to understand what work he has done before, his requirements and ideas. Frequently asked questions:
1) For the location of the project site, it is best to have latitude and longitude.
2) What is the approximate area of the site, and how large is the planned scale? (Generally, the owner has a contract for the site, which can be confirmed by consulting the contract and other ownership certification documents such as the location, the remaining period of the area contract, and other information.)
3) What is the general landform of the site, the condition of surface attachments, whether there are graves, whether compensation is involved; whether there are sensitive objects such as military facilities and cultural relics.
Whether there is an accessible substation near the site, how far is it, what is the voltage level, what is the capacity, and whether there is any gap; It will increase the cost, and most areas can only access 30%-50% of the capacity.) After the communication, the first thing to prepare is to understand the relevant local policies. For example, what is the scale index given by the state to the province? Does the province have a separate subsidy policy for the project? Learn as much as you can about policies like this. If you can know whether there is a completed project in the project location, what is the benefit? It would be even better if there are projects under construction and to what extent. Finally, a set of hard-wearing and scratch-resistant clothing and comfortable sneakers are also essential.
2. On-site survey work
The flat site is relatively simple, so let’s use the mountain site to talk about a few issues that need attention.
1) Observe the direction of the mountain, is it north-south or east-west? The mountain should be east-west, and must have a southward slope. In addition, the surrounding mountains are not considered.
2) Mountain slopes greater than 25° are generally not considered. If the slope of the mountain is too large, the subsequent construction will be very difficult. It will be difficult for construction machinery to work on the mountain, and the civil work will also be difficult, which will greatly increase the project cost. In addition, the difficulty of future maintenance (cleaning, overhaul) will also increase greatly. At the same time, if a large area of earthwork development (cable trench) is carried out on a mountain with such a slope, it may not be possible to pass the approval of water and soil conservation.
3) Basic geological conditions. Although accurate geological conditions need to be surveyed, you can roughly check them visually, and it is best to visually check the soil layer with a certain thickness. It is also possible to see how thick the soil layer is and what is under the soil layer from some faults or excavated sections. If it is a hard rock less than half a meter by visual inspection, then the workload of the foundation will be particularly heavy in the future.
After the above-mentioned problems are solved, use GPS to mark several points around several boundary points of the site to basically delineate the site range. At the same time, it is necessary to look at the geological conditions of the site from various angles. Because the site area is too large, you can't see the whole picture from a boundary point, and you may ignore many important factors.
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