How to ensure the stability of building foundation by reclamation?

Muddy island is a typical soft foundation, because it is mainly silt and muddy soil, with high porosity and high compressibility. The natural consolidation speed is extremely slow, which will produce uneven settlement, lead to cracks and inclination of the building, and affect the normal use. When building on silt, artificial reinforcement measures must be taken. If piling is adopted, the cement pile will be inclined or even broken due to the overall instability of the foundation. We use vacuum preloading method to treat this soft foundation. This method is suitable for treating soft soil foundation. It was invented by Swedes in 1952 and was introduced to China in 1980s. However, due to the backward materials at that time, the vacuum pressure could only reach 60kpa. Later, with the progress of processing capacity and material science in China, this method has been widely popularized and applied, and achieved good results. At present, China has the most mature construction experience in the world, but the Japanese are ahead in theoretical research and application of new materials. The overall bearing capacity of sand-filled island foundation is much higher. With the dissipation of pore water in sand after reclamation, the bearing capacity is rapidly improved, and some islands do not even need special treatment, but only need structural design according to the bearing capacity. I am now reclaiming land from the sea in Jakarta Bay, Indonesia. There is no problem with the bearing capacity of the sand-filled island, but there is the possibility of earthquake liquefaction. Anyone who has studied geological engineering knows that although sand is a good foundation material, foundation liquefaction is also very dangerous. So after the reclamation, the owner invited us to deal with the problem of sand liquefaction. This situation is mainly dealt with by combining vibroflotation and dynamic compaction, and the process is not complicated. You can learn by yourself if you are interested. Thousands of cutter suction ships and tens of thousands of workers gathered in the South China Sea on a large scale, and many islands surfaced almost overnight, which really attracted the attention of the whole world. Depending on the dredged materials, some islands use seabed mud and some use sand. Different fillers lead to different post-treatment methods.