What should I do if the foundation sinks and the wall cracks?
2. Take measures to control the further settlement of the foundation on the basis of settlement positions such as pressure settlement.
3. Set external foundation and connecting beam, or add ground beam to the structure to overhead the existing foundation, and change the force transmission path of the upper structure.
4. Observe whether the settlement of the foundation is delayed, and work out the repair scheme of the superstructure.
5. Repair the superstructure, add ring beam structural columns, and strengthen the integrity of the superstructure.
Extended data:
1, foundation settlement refers to the foundation settlement caused by the compaction of foundation soil under the action of additional stress. Excessive settlement, especially uneven settlement, will make the building tilt and crack, making it unable to use normally. The existing settlement prediction methods are limited by the great difference between the assumed conditions and the actual conditions, and the settlement prediction results are often quite different from the measured settlement values, so the research on foundation settlement prediction methods needs to be further developed.
2. Basic concept: Before the construction of buildings and geotechnical structures, there is already dead weight stress in the soil, and the load of buildings and geotechnical structures is transferred to the foundation through the bottom of the foundation or embankment, which changes the initial stress state of the natural soil layer. Under the action of additional three-dimensional stress components, the foundation undergoes vertical, lateral and shear deformation, causing vertical and lateral displacement of each point. The vertical deformation of foundation surface is called foundation settlement or foundation settlement.
3. Settlement reason: Due to the uneven building load and foundation, the settlement of various parts of the foundation or embankment is always uneven, resulting in additional stress and deformation of the superstructure or pavement structure. Uneven settlement of foundation beyond a certain limit will lead to cracks, deflection and even damage of buildings, such as cracks in brick walls, crane tracks or slide rails, inclination angle of towering structures, deflection of engine shafts, fracture of connecting pipes and buildings, and bridge deviation. From piers, beam surfaces or sidewalks.
4. Settlement type: settlement of building foundation under long-term load. The final settlement can be divided into three parts: initial settlement (or instantaneous settlement), primary consolidation settlement (consolidation settlement for short) and secondary consolidation settlement.
Baidu Encyclopedia-Foundation Settlement