Is the secondary grouting of foundation bolts not as secure as the initial embedding?
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The master asked whether the secondary grouting of the anchor bolts was due to the fact that they weren’t properly embedded during the initial installation The civil engineering department says that secondary grouting provides greater stability, as it uses a concrete grade one higher and it is shrinkage-free. Who is right after all?
Theoretically, the secondary grouting of anchor bolts is not as secure as primary embedding, but there is no need to consider its impact on equipment installation. Unless the depth of the hole does not meet the requirements
The secondary grouting of the foundation bolts was not secure due to the lack of proper initial embedding. Generally, secondary grouting makes it easier to install equipment. However, for equipment with a high length-to-diameter ratio, such as towers and the like, it is not common to reserve holes for secondary grouting; instead, bolts are embedded directly.
The secondary grouting of foundation bolts is not as secure as primary embedding, but in practical engineering work, this secondary grouting method is often used for the sake of convenience in construction and to ensure control over installation quality! For example, the absorption towers we use (with a diameter of around 13 meters and a height of around 30 meters)
The secondary grouting of the foundation bolts wasn’t done properly due to the lack of proper initial embedding :) :) :)
According to the working procedures for secondary irrigation, it is not possible to carry out embedding.
In fact, I think secondary grouting is mainly used to facilitate equipment installation, especially for equipment that is subject to vibrations; its use is quite common in such cases. . . . . .
Secondary grouting is not as secure as primary embedding; it is used in applications where strict positioning requirements exist, and in equipment that cannot use primary embedded components, such as pumps.
The first grouting is used for the anchoring of the corner bolts to the foundation, in order to stabilize the longitudinal forces； The second grouting serves to secure the equipment base, shims, and foundation, thereby stabilizing lateral forces. (Note: The second grouting is carried out after the equipment and foundation have been installed and secured.)
There should be no issue with secondary grouting not being as secure as primary embedding. Through measures such as an appropriate anchorage depth and using grout of a grade one higher than that of the original foundation, the two should have the same bearing capacity. The secondary grouting method is employed primarily to facilitate the positioning and installation of equipment, avoiding issues resulting from inaccurate embedding locations that would make adjustments difficult. Of course, for components that are subject to tensile forces, embedding is still necessary.
If it’s embedded and properly cured, it’s actually the best option. However, for the foundation of moving equipment, if secondary grouting is not carried out, it will be difficult to ensure that the equipment can be installed successfully. In fact, whether it is secondary grouting or embedding, as long as the work is carried out in accordance with standard specifications and the design requirements are strictly followed, the strength and other aspects will be sufficient to meet the requirements of the equipment.