多层地基条件下的一维沉降计算一般采用分层总和法。以应力面积计算法为例，

The calculation of one-dimensional settlement under multi-layer foundation generally adopts the layered sum method. <br>Taking the stress area calculation method as an example, there are n layers of foundation soil distributed within the compression layer, the compression modulus values ​​are Es1, Es2, Esn, and the bottom depth of the layer is z1, z2, zn, respectively, then the i The expression of soil compression Si can be written as

The one-dimensional settlement calculation under multi-layer foundation conditions is generally calculated by hierarchical sum.<br>In the case of stress area calculation, there is an n-layer ground soil within the compression layer, with compression modulus values of Es1, Es2, Esn, and layer bottom depth sz1, z2, zn, then the expression of the compression volume of the i-layer soil can be written as the expression of the i-layer soil.

Generally, the method of layered summation is used to calculate the one-dimensional settlement of multi-layer foundation.<br>Taking the calculation method of stress area as an example, there are n layers of foundation soil distributed in the range of compression layer, and their compression modulus values are Es1, ES2,  ESN, and the bottom depth of layer is Z1, Z2,  Zn, respectively. Then the expression of the compression amount △ Si of layer I soil can be written as<br>