✔ Calculate a strip foundation in 5 minutes and get a complete and accurate set of drawings https://buildup.ru/ Pile and grillage foundation from A to Z, full instructions here: https://clck.ru/PdBTM Pile and grillage foundation is a fairly simple structure made of piles and a concrete or metal strip (grillage) connecting them. The grillage is designed to distribute the uneven shrinkage of the piles, which means it takes on serious bending loads. 0:32 definition and areas of application of a pile and grillage foundation 0:43 why a grillage is needed 0:52 pile embedment depth 1:26 types of pile and grillage foundations 1:46 Pros of a pile and grillage foundation 2:07 Cons of piles 2:26 how to calculate the load on piles 3:24 How to build a pile and grillage foundation with your own hands? Piles are driven below the depth of soil freezing. This foundation has a fairly long service life - several decades. It is not as expensive as a strip foundation or, even more so, a slab. But you should not make a pile-and-grillage foundation because it is cheaper or you like it better. It is used on serviceable types of soil, for example, if you need to build on a peat bog. Other indications for use are seismic activity, high groundwater levels, and steep slopes where it is not possible to level the site. There are several types of pile-and-grillage foundations. Here is a classification by the method of immersion in the ground: • driven - when piles are driven into the ground using special equipment • cast-in - it is necessary to drill wells, which must then be filled with concrete • screw - piles are screwed into the ground using special equipment. By the type of piles, foundations are classified as: • driven • bored • drilled • screw Grillage - i.e. the upper part of the foundation, which takes on the entire main load. Usually, there are three types of grillage: • low or recessed; In this case, it works like a regular strip. • above-ground - in this case, the grillage is located directly on the surface. • high or “hanging” - usually used if the groundwater on the site is too close to the surface. The pile-grillage foundation has many advantages: • can be used on any type of soil, even peat! • you do not need to level the site. • It is cheaper than traditional foundations • It has an impressive service life; • A properly built pile-grillage foundation has excellent bearing capacity and reliability But this foundation also has many disadvantages: • limited number of storeys - maximum 2 floors • you can make a basement, but it is difficult and expensive • Beginners and do-it-yourselfers are unlikely to do without mistakes. It is better to trust proven professionals here. • In any case, you will need special equipment Now to the stages. As always, everything starts with project preparation. To do this, you need to calculate the load on the foundation, the depth of the supports and decide on the amount and type of material from which the grillage will be made. The next step is to prepare the site itself. As usual, we remove the fertile layer, get rid of the roots of plants and generally clear the site. Why this is important has been said more than once, here is one of such videos. Next, we mark the front of the work: where the supports will be installed, how the grillage goes, where the supporting structures will be located. If the foundation is deepened, then a trench is dug for the grillage, even as the markings on the parade ground. After this, an anti-heaving cushion of sand, crushed stone and geotextile is prepared. Next, we drill holes for the piles, not forgetting to lay the so-called heel on the bottom: a sand cushion, waterproofing or, for reliability, an FBS block. Otherwise, the concrete will sag over time. As we remember, either reinforced concrete beams or a monolithic strip are used to erect a grillage. Here everything is as usual: formwork from boards is attached, supports are installed. Do not forget about communications if we plan to use water supply, electricity and sewerage. To ensure increased strength of the foundation, a reinforced frame is also placed in the well - 3-4 rods tied with wire. The grillage tape is reinforced in almost the same way as a conventional strip foundation. But in this case, the reinforcement bears an increased bending load due to uneven shrinkage of the piles. And it is better not to save on the thickness of the rod and the quality of the binding. And do it with the correct overlap and the correct bends in the corners. By the way, you should not overdo it with iron either. Remember that only the upper and lower rows of reinforcement work on bending, and all additional rows are a waste of money. Watch this video: • Pile and grillage foundation from A ... ➤ Our website: https://buildup.ru/