Affected by many factors such as climate, geology, the surrounding environment, and the quality of its own structure, the building may be deformed and inclined after completion, which seriously affects the residential use, and even endangers the life and property safety of the residents, and there is a security risk. When problems with residential foundation repairs are found, we should find professionals to analyze the reasons forresidential foundation repairsin time, and adopt reasonable and feasible reinforcement and correction programs to correct the building as soon as possible.

1. Reasons for the superstructure of residential foundation repairs

1. Eccentric building load.

2, the building is complex or the load is too large.

3. Improper construction techniques or procedures.

4. Improper application of load on building structures.

5. The tilt of the tall structure caused by wind or sunlight.

2. residential foundation repairs

1, the geological conditions are complex, and the compressibility of the soil layer is relatively different.

2. Improper foundation treatment.

3. Uneven settlement of soil under unfavorable conditions.

4, landslide, collapse and other effects on the foundation.

5. The foundation soil loses strength and bearing capacity due to pollution and erosion.

6, in the process of long-term use of the building, the additional settlement caused by environmental changes, resulting in the settlement of the building or the settlement difference is too large.

7, the existing building due to change the use of function or use requirements, resulting in an increase in load, resulting in the original foundation bearing capacity and deformation can not meet the requirements.

Third, reinforcement and correction technology

1, lifting correction method: The column is cut off on the basis of the whole board, the top lifting column is used, and after being in place, only the gap is stuffed. Then the anchor static pressure pile is used to lift the whole foundation through the anchor rod and jack to achieve the purpose of deviation correction.

2, dig soil correction method: with specific tools and methods, from the building settlement of the smaller side of the base or the outside of the foundation to take out an appropriate amount of soil, in order to achieve the purpose of correction. Excavation correction method is a widely used correction method, which is generally divided into shallow excavation under the base, deep excavation under the foundation and deep excavation outside the foundation.

3, anchor static pressure pile method: the use of the anchor in the original foundation provided by the force of the pile, the pile is generally small section pile, mainly used for foundation reinforcement treatment. Its advantage is that the machine used is simple and easy to operate; The disadvantage is that the cap has holes and the anchor is complicated.

4, pile pressure correction method: for the side of the foundation subsidence is serious, the method of pile pressure excavation is adjusted. The sinking pile foundation is fixed first, and then the soil on the other side is excavated to reduce the bearing area of the foundation and realize the correction of the building.

5. foundation settlement repair technology: new special composite materials are injected into the depth of the ground to consolidate with the soil to form a new composite foundation, improve the strength of the soil and the bearing capacity of the foundation, and realize flexible lifting and rectification of residential foundation repairs.

Compared with the traditional correction method that needs to destroy the building structure, the process is complex and time-consuming, Tongcheng soft foundation trenchless repair technology adopts miniaturized equipment, micro-hole treatment, non-destructive and controllable, no need to break, and does not affect the normal life of residents, which can realize the deep strengthening of the building soil, flexible lifting, and restore the building to a balanced state.

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