【摘要】 随着大尺寸地下构筑物设计的增多,深基坑开挖、降水的难度也随之增加。在华电宁夏灵武发电有限公司二期2×1 000 MW空冷机组工程翻车机室区域基坑(基坑最深-16.00m)降水中,采用环状管井降水技术对该处基坑进行了地下降水施工,工程实施后降水效果明显,基坑开挖后土体固结良好,达到了设计要求。该项技术的实施,为在同等地质条件地区地下水埋藏浅、基坑相对深且水量相对丰富的软土地区的构筑物基坑降水积累了经验。更多还原

【Abstract】 Along with increase of design of underground structures with large size,the difficulties of deep foundation pit excavation and dewatering are increased.In the 2×1 000 MW air-cooled unit of Huadian Ningxia Lingwu Power Generation Company Limited project phase II,the depth of the foundation pit of wagon tipper room is about-16.00m.In the foundation pit dewatering construction for this area,the annular tube well dewatering technology was adopted.After the implementation of the dewatering construction,the ground water level is lowered obviously;and the consolidation of the soil body of excavated foundation pit was favorable and can satisfy the design requirement.The implementation of this technology provides some experiences for structure foundation pit dewatering in soft soil area with larger pit depth,rich ground water and higher ground water level.更多还原