以下为句子列表：
英文: The works included 24 bored piles of 2.5 meters in diameter and 55 meters in depth, 500 meters long underground concrete diaphragm wall of 0.8 meters thick and 25 meters deep, 450 pre-cast concrete pile of 0.5 meters in diameter, 12 meters deep soil excav
中文: 其工程内容包括了24支直径2.5米，深达55米直入岩层的钻孔桩，周长500米，深度25米，厚度0.8米的地下连续混凝土墙，450支直径0.5米预制混凝土桩，12米深开挖，多层水平钢支撑系统，混凝土桩承台及地库底板结构。
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