Differential settlement (settlement difference), also known as uneven settlement, is an important indicator reflecting the deformation characteristics of civil engineering structural foundations. Generally, it refers to the difference between the settlements of two adjacent foundations in the same structure. If the differential settlement is too large, additional stress will be generated in the corresponding superstructure; when a certain limit is exceeded, cracks, tilting and even failure will occur.

Differential settlement does not reflect anything, but the building inclination calculated by differential settlement (settlement difference) can reflect the inclination of the building.

For example, the settlements of points A and B in the inclined direction of the foundation or member are Ha and Hb respectively, and the unit is mm , then the differential settlement (settlement difference) between the two points is: s=Ha-Hb

Then the inclination of the two points A and B is: a=s/L

Where L is the distance between points A and B , in mm .

What does the inclination reflect? A very important function of the inclination is to finally satisfy the allowable value of building deformation. We mentioned the allowable value of the settlement observation of the main body of the building. The values in the red box are all that we must meet in the final settlement observation of the building. condition.

Then why did you say that the differential settlement (settlement difference) can't reflect anything? That is because there is no distance. The above figure mentions the requirements for the settlement difference, but the premise is that the following allowable values carry the distance, so the settlement difference The distance has to be added to make sense.

The calculation of differential settlement (settlement difference) and inclination is of great significance, which can always reflect the inclination of the building. We have also mentioned the causes and solutions of differential settlement before, and you can refer to it if you need to know.