Hello, Chengcheng is here to address the above questions now. The method of grouting reinforcement for foundation settlement, and what methods of foundation treatment are available, are likely unknown to many. Let's take a look together!
1. Introduction: The foundation is the cornerstone of our house construction, its stability directly determining the quality of the upper structure. Therefore, many foundation treatment methods have been invented to reinforce the foundation and protect the upper buildings.
2. Today, let's explore the various foundation treatment methods.
3. Foundation treatment essentially refers to the process of preparing the ground according to the requirements of the upper structure, making it stronger and more capable of bearing loads, thereby ensuring the quality of the building.
4. There are many methods for ground treatment. Next, let's understand each one.
5. Compaction Layer Replacement Method - This method is primarily used to compensate for soft or uneven foundations, which typically have poor load-bearing capacity. Treatment can reinforce the foundation, enhancing its load-bearing strength.
6. Compaction Method - If the foundation is composed of sandy soil, gravel, or miscellaneous fill, its compactness and strength are relatively poor. The compaction method involves compressing such foundations to enhance soil tightness and increase its strength. This method requires testing for suitability before use.
7. Soil-Cement Mixing Method The soil-cement mixing method is divided into dry mixing and wet mixing. It can be used for consolidation of clay, cohesive soil, loess, etc., in the foundation. However, peat soil, soils with high viscosity, excessively wet or dry soils are not suitable for this treatment method.
8. Sand and Gravel Pile Method - This method involves adding sand and gravel piles into the foundation, forming a composite foundation with loose and soft clay soil, thereby enhancing the bearing capacity of the original foundation.
9. Compaction Pile Method - The compaction pile method can be used with or without fill material. Compaction pile with fill refers to adding stone piles into the foundation, primarily used for treating clay, silt, and unconsolidated fill foundations to enhance their stability.
10. Unfilled vibro-compaction can be used to treat low-viscosity subsoil, preventing ground settlement.
11. Preloading Method - When the foundation is composed of silt and filled soil, preloading method can be used for treatment. For foundations with low viscosity, stacking preloading can be employed, while for those with high viscosity, plastic preloading is recommended. To prevent foundation settlement, vacuum preloading can be used, which requires the installation of drainage wells within the foundation.
12. Compacted Soil Pile Method - This method is simple to construct, cost-effective, and produces quick results, primarily suitable for mixed fill soil, clean fill soil, and clayey soil foundations near the groundwater level, particularly effective in dangerous building renovation areas.
13. High-pressure Jet Grouting Method - This method, with its deeper penetration, is not only used for ground reinforcement but also for dam seepage control. It is suitable for foundations containing large rocks, abundant organic matter, and plant stems and roots. The high-pressure jet can break up the rocks and roots, evenly distribute the soil, and enhance the stability of the foundation. This method is not suitable for foundations with significant groundwater flow.
14. In addition to the aforementioned methods, there are many other techniques for foundation treatment, such as lime pile method, loess compacting pile method, and pile hammer expansion pile method, etc.
15. These methods vary in their construction techniques, but their purpose is to reinforce the foundation and enhance its stability. We can choose the most suitable one based on the actual situation.
