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比萨斜塔始建于1173年8月,由著名建筑师那诺·皮萨诺主持修建。最初塔高设计为100米左右。在建造头两层时,塔身一直是垂直的,但是到了第三层,由于地基不均匀和土层松软塔身开始倾斜,并且不得不在1185年暂时停工。由于施工所选择的地点十分地不稳定,并不足以承受如此巨大的一座建筑。斜塔地基下面土层十分特殊,有好几层不同材质的土层,由各种软质粉土的沉淀物和非常软的黏土相间形成,而在深约
Leaning Tower of Pisa was built in August 1173, under the auspices of the famous architect Nano Pisano. The original tower design is about 100 meters. The tower was always vertical when building the first two floors, but on the third floor, the tower began to tilt due to uneven foundations and soft soils and had to be temporarily suspended in 1185. Due to the construction site is very unstable choice, not enough to withstand such a huge building. The soil beneath the leaning tower foundation is very special, with several layers of different materials, formed by the sediments of various soft silts and very soft clay,