Five aspects of foundation settlement and improvement

The improvement measures for the foundation mainly include the following five aspects:

1. Improve shear characteristics

The shear failure of the foundation is manifested in the insufficient bearing capacity of the building's foundation; Causing structural instability or slope instability during earthwork excavation; Causing uplift near the foundation or uplift at the bottom of the pit during excavation. Therefore, in order to prevent shear failure, measures need to be taken to increase the shear strength of the foundation soil.

2. Improve compression characteristics

The high compressibility of the foundation is manifested in the large settlement and differential settlement of buildings, therefore measures need to be taken to increase the compressive modulus of the foundation soil.

3. Improve permeability characteristics

The permeability of the foundation is manifested in the foundation leakage caused by dams, houses, and other foundations; During the excavation process of the foundation pit, quicksand and piping are generated. Therefore, it is necessary to study and take measures to make the foundation soil impermeable or reduce its water pressure.

4. Improve power characteristics

The dynamic characteristics of the foundation are manifested in the liquefaction of silt and sand during earthquakes; Due to traffic loads or pile driving, adjacent foundations may experience vibration induced subsidence. Therefore, it is necessary to study and adopt measures to prevent liquefaction of foundation soil and improve vibration characteristics to enhance the seismic performance of the foundation.

5. Improve the characteristics of poor foundation of special soil

It mainly refers to measures taken to eliminate or reduce the collapsibility of loess and the expansion and contraction of expansive soil in foundation treatment.