Teach you the correct understanding of foundation reinforcement

1、 What causes the foundation to sink? Normally, there are differences in building loads and uneven foundations, resulting in uneven settlement of various parts of the foundation or pavement. This causes additional stress and deformation in the upper structure or pavement structure accordingly. This kind of high and low settlement exceeding a certain limit will cause local cracking and tilting of the building to varying degrees, ultimately leading to overall damage. Common issues include cracks in walls and building tilts.

2、 What should I do if there is foundation settlement?

（1） Crack repair:

(1) Analyze the situation of foundation settlement:

Usually, there are two situations of foundation settlement: one is a relatively uniform overall decline: cracks that appear will no longer continue to develop in the coming years and will not affect the safe use of the structure. If through continuous and regular observation, the entire house sinks without tilting to any side, then implementing foundation reinforcement is not so urgent. If uneven settlement occurs, cracks will appear in the building. Cracks can weaken the load-bearing capacity of the structure and damage its integrity. We need to promptly reinforce the foundation of the building.

(2) Different crack repair methods are adopted for the subsidence in the above different situations:

1) For cracks that do not affect safety use, joint filling or grouting can be used for repair. Joint filling and repair are divided into cement mortar filling and disc cement mortar filling. The process is as follows: first, clean the cracks, and use tools such as pointing knives, trowels, scrapers, etc. to fill the brick joints with 1:3 cement mortar or cement mortar one level higher than the masonry mortar or polymer cement mortar mixed with 107 glue; When filling the joints with reinforced cement mortar, steel bars should be embedded in the brick joints every 4-5 bricks, and then processed according to the above process. Grouting repair is the process of using pressure equipment to press cement slurry with a water cement ratio of 0.7-1.0 into the wall to bond the cracks.

2) Cracks that affect safe use should be reinforced. Cracks that occur due to insufficient wall strength can be reinforced with steel mesh on the wall surface. The mesh can be made of medium diameter 6 @ 100-300 bidirectional or medium diameter 4 @ 100-200 bidirectional steel mesh, and fixed with through wall tension bars. Then, fine aggregate concrete can be poured or cement mortar can be applied layer by layer for reinforcement. Before construction, the wall plastering should be scraped clean, and after grouting, it should be cured for about seven days.