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挤密桩复合地基是以生石灰为主要原料,掺加砂子、碎石等骨料后形成的一种复合地基。它的作用机理是,生石灰块吸水分解后膨胀,桩间土脱水、被挤密后强度得到提高。复合地基的桩体是随地基土层的软硬程度而变化的。土层较软时,桩体直径较大;土层较硬时,桩体直径较小,桩体是变直径的。所以从整体上看,它比天然地基还均匀。挤密桩复合地基主要用于处理软弱地基,使处理后的地基变成由桩和桩间土共同受力的复合地基,以
Compaction pile composite foundation is based on lime as the main raw material, mixed with sand, gravel and other aggregate formed after a composite foundation. Its mechanism of action is that the lime block expands after absorbing water and decomposes, and the soil between piles is dehydrated and squeezed to increase its strength. The piles of the composite foundation vary with the degree of softness and hardness of the ground soil. When the soil is soft, the diameter of the pile is large; when the soil is hard, the diameter of the pile is small, and the pile is of variable diameter. So on the whole, it is evener than the natural foundation. The compact pile composite foundation is mainly used to treat the soft ground, so that the treated foundation becomes a composite foundation that is subjected to the force between the pile and the soil between the piles.