Method for increasing foundation bearing capacity

Abstract

The invention discloses a method for increasing the foundation bearing capacity. The method is characterized in that a vacuum preloading technology and a grouting technology are organically integrated, a vacuum state is formed in the stratum of a soft soil foundation by utilizing a vacuum pump in a vacuum water draining system, the technical condition of vacuum preloading is reached through controlling the vacuum degree of the stratum, and prepared grout is grouted in the stratum in a reasonable time; on one hand, the stratum negative pressure caused by vacuum is fully utilized, the grout can be more easily permeated in the stratum within a control time, the space occupied by stratum pore water (the stratum pore water is drained due to vacuum water draining) is filled, the strength is increased after concretion consolidation, thus the bearing capacity of the soft soil foundation is effectively increased, the consolidation settlement amount caused by the vacuum water loss can be simultaneously reduced, the consolidation rate can be effectively quickened, and the processing rate can be increased; and on the other hand, the vacuum state in the stratum is utilized, thus the grout can be conveniently permeated in the stratum, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to a foundation treatment technology, in particular to a method for improving the bearing capacity of the foundation, which is suitable for treating large-scale soft soil foundations such as sea flat reclamation dredging and filling soft soil, river channel dredging silt and the like. Background technique [0002] The soft foundation for tidal flat reclamation is characterized by high water content, fine soil particles, strong fluidity, mostly muddy soil, and poor engineering properties. The nature of soft soil determines that it needs to be consolidated before it can be used as the foundation of engineering construction. [0003] At present, there are many methods to improve the bearing capacity of soft soil foundation. However, due to the large area of ​​tidal reclamation area and high treatment requirements, many existing soft soil foundation treatment methods are difficult to solve problems such as tidal reclamation and soft ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods to improve the bearing capacity of soft soil foundations. However, due to the large area of ​​tidal reclamation area and high treatment requirements, many existing soft soil foundation treatment methods are difficult to solve problems such as tidal reclamation and soft foundations.

At present, the common method used to treat the soft foundation of tidal flat reclamation is mainly the vacuum preloading method. Although the treatment efficiency of this method is high, the treatment effect is often very poor, and it is difficult to meet the requirements of roads, medium and high-rise buildings, and heavy-duty buildings with high engineering requirements. The foundation conditions of factories, storage areas, etc.; on the other hand, this method takes a long time to process the foundation, which affects the later development speed, and the cost is high

Images