Seeking advice on the installation of water pump foundations
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Our company is installing a multi-stage feed water pump. According to the standard procedure, it is necessary to use shimming iron: grind the contact surface of the foundation shims so that more than 70% of it is exposed, place flat shims and inclined shims on top, and then carry out grouting again. But to save time, the workers roughened out the area where the shims were originally placed, about 2 CM downward (as shown in the diagram). They wanted to pour cement there and place flat shims in order to level the surface, thereby avoiding the need for grinding. I checked online and found that there indeed is a technique called the mortar filling method, which involves pouring mortar between the foundation and the shims. Is this approach feasible? If it’s possible, what would be the best way to do it? If it’s not feasible, how can it be remedied (in my opinion, cut off another 2CM layer with a machine)?
In fact, this depends on achieving the desired final result, as well as having the conditions for a second installation with replacement equipment. The proper installation involves placing a flat steel plate on top of the mortar (preferably on a concrete pad made of grouting material), followed by two right-angled inclined steel plates, with another flat steel plate at the very top to complete the set. That is, the upper and lower parts are flat iron pieces, while the two inclined iron pieces on opposite sides of the middle slope form a set. By adjusting the contact surface of the two inclined plates, the height can be increased or decreased. You can reject everything else, because there are relevant regulations for this one. For reference.
Is there a detailed mortar manufacturing process? How thick should the mortar be, and what should the area be? In what situations is it applicable?
There’s no need to do it this way; using a flat pad and mortar as a base is essentially the grouting method for leveling, and this is how alignment is achieved in most cases nowadays.
There is very little detailed information available online regarding the grouting method or seat grouting method. I am currently installing a feed water pump for a multi-stage boiler in a power plant, and high requirements are placed on its centering and load-bearing capacity. Can this grouting method be used with feed water pumps? If the grouting method is more practical, why is the turbine island still installed by grinding the foundation and placing shims, which is time-consuming and labor-intensive?
Create rough surfaces in the shims’ seating areas; there should be 3–5 such rough spots per square decimeter, with a depth of about 10 mm. These spots should be distributed as evenly as possible. Fill these areas with cement mortar of a higher grade or with grouting material. Once the mixture has started to set, use a level to adjust the surface to the level required by the specifications