Issues regarding the pre-drilled holes for equipment foundation bolts
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I have a question: Do all the foundation bolts for a pump require pre-drilled holes? Once the equipment arrives at the site, the foundation bolts are installed and leveled, followed by grouting – this is referred to as the first grouting. Grouting is performed again after that, and this is called the second grouting. Is my understanding correct? Additionally, it is possible to install the fixing bolts directly; once the equipment arrives, it can be positioned right away, then leveled, and secondary grouting can be carried out. Is such a method available?
The specific methods for installing the foundation bolts are indicated in the structural drawings. These drawings are based on the dimension charts provided by the equipment manufacturer; during civil engineering and structural construction, the foundation bolts are installed according to these dimensions, with a reference surface being left in place. Once the equipment arrives, it is mounted directly onto these foundation bolts – the dimensions are usually appropriate in such cases. After that, alignment is carried out, and the grouting that takes place after alignment is known as secondary grouting
The last edit to this post was made by The boss is serving congee on 2019-6-3 at 14:14. Well, it’s this second half that represents the purpose of secondary grouting； :Time: The first grouting and the second grouting are related to the installation of moving equipment, as the foundation bolts for such equipment are not fixed directly in the foundation like those for stationary equipment. Instead, holes are pre-made during the foundation construction; once the equipment is installed and positioned according to its center line, the foundation bolts are used to secure it in place. Thus, primary grouting involves using grouting material to pour together the pre-existing holes and the foundation bolts, thereby fixing the foundation bolts. Secondary grouting, on the other hand, is carried out after the foundation bolts have been fixed and after the moving equipment has been precisely aligned; it involves pouring grouting material around the shims, thus fixing the grouting material to the shims. :hug:
Pumps are generally small, and they can be installed directly with minimal error.
Your explanation is very clear. Thank you. What about large equipment, such as compressors? Are bolt holes also pre-drilled in them, so that foundation bolts can be installed once the equipment arrives?