How are large storage tanks or other containers (especially large reactors) secured with anchor bolts?
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How are large storage tanks or other containers (especially large reactors) fixed to concrete pedestals using anchor bolts? Typical storage tanks or containers often use embedded plates; steel plates are buried in the piers in advance, and then the bottom of the storage tank is directly welded to those steel plates. Foundation bolts may not be used. . However, for those that require anchor bolts, such as reaction kettles, it is too complicated to calculate the installation position and depth of the anchor bolts. . Can the position also be determined by embedding steel plates, just like in storage tanks? How to proceed during the actual construction? This post was last edited by qq375170364 on 2009-3-26 15:22.]
They are fixed directly to the base plate and are divided into two categories: one type lacks rib plates, while the other type has them.
When pouring the concrete pads, holes for foundation bolts are left, with a depth of approximately 30D (the diameter of the bolt) and a diameter of around 1.5D; when installing the storage tank, simply insert the foundation bolts into these pre-made holes and pour cement in them!
Method 1: Reserve anchor bolt holes with a depth of approximately 30D (bolt diameter) and a diameter of around 5D； Method 2: Bury the foot bolts directly in the ground; this provides the most stable fixation for the equipment. However, it is essential to carefully verify the position of the bolts to prevent installation issues caused by any errors in their placement.
We both make two ring plates, with exactly the same bolt holes. One is used on the tower, while the other is buried in the foundation during construction; bolts are installed according to the bolt holes on the ring plates. As long as the bolts are installed straight, there are generally no problems.
As a supplementary note, the burial depth of foundation bolts should be determined with reference to other posts; there are posts in this area that specifically discuss the burial depth of foundation bolts
When designing, factors such as the device’s height, base area, and weight need to be considered. There are methods for fixing equipment using embedded iron, but the standard approach is to use foot bolts. The advantages of this method include better resistance to wind pressure and earthquakes, as well as the ability to make adjustments during horizontal installation. For equipment with a large base area and high weight, where wind pressure is not a concern and low requirements exist regarding horizontal alignment, the use of embedded iron for fixation can be considered. (For reference)
The construction requirements for the foundation of large tank basins are very strict; the embedded steel plates must be welded to the rebar in the foundation. There are requirements regarding the quantity, size, and thickness of the embedded steel plates. The footings of some tanks are still inclined (depending on the properties of the material and process requirements); welding at the anchor bolts is even more stringent, with strength requirements typically designed to withstand earthquakes of magnitude 8.