The basic introduction to surcharge preloading techniques in China
The foundation is drained and consolidated under the preloading load, the foundation is deformed, the strength of the foundation is improved, and the prefabricated load is removed, and then the building (structure) is constructed, which not only improves the bearing capacity of the foundation, but also has small settlement after construction.
China's soft soil areas are widely distributed. Its characteristics are: large water content, low strength and high compressibility, which is difficult to meet the needs of engineering construction. However, with the development of the national economy, many engineering projects have to be constructed on soft soil foundations. Therefore, it must be reinforced, otherwise it will cause large settlement or even damage.
In engineering practice, the traditional and effective soft soil foundation reinforcement method is the preloading method. However, due to the insufficient source of materials, transportation shortage, and difficulty in turnover, the construction materials have a direct impact on the construction schedule, resulting in long construction period and high project cost. To this end, the vacuum preloading method at home and abroad solves the problem of insufficient material for stacking and long construction period. However, with the improvement of reinforcement requirements, the vacuum preloading method cannot meet the requirements of engineering practice. Therefore, a new method of vacuum combined with preloading preloading soft soil foundation has been created.
The surcharge preloading method has been widely promoted and used in domestic port engineering, industrial and civil construction, airport runway construction and other foundation treatment projects. It has achieved good reinforcement effect and objective economic benefits, and accumulated a large amount of practical experience. At present, the method has matured after more than ten years of engineering application.
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