| 三峡二期围堰预进占施工 |
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| 引用本文： | 易作成. 三峡二期围堰预进占施工[J]. 中国三峡建设, 1997, 4(9): 25-27 |
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| 作者姓名： | 易作成 |
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| 作者单位： | 中国葛洲坝集团公司三峡指挥部工管部土石方科!湖北省宜昌市，443002 |
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| 摘 要： | 二期围堰由上游横向围堰和下游横向围堰组成，其中上横围堰长１３７５．９４ｍ，堰顶高程８８．５ｍ；下横围堰长１０７５．９４ｍ，堰顶高程８１．５ｍ。分为试验段，预进占段，河床段三个阶段施工。施工分水抛填，陆上填筑，堰体风化沙振冲加密和防墙施工。
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| 关 键 词： | 三峡工程 二期围堰 预进占段施工 围堰 |
DUMPING IN ADVANCE FOR SECOND STAGE COFFERRDAMS |
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| Yi Zuocheng. DUMPING IN ADVANCE FOR SECOND STAGE COFFERRDAMS[J]. China Three Gorges Construction, 1997, 4(9): 25-27 |
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| Authors: | Yi Zuocheng |
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| Affiliation: | Yi Zuocheng |
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| Abstract: | The second stage cofferdams, including an 1, 375. 94 m of the upstream transverse cofferdam at top elevation of 88. 5 m and an 1, 075. 94 m of the downstream tranverse cofferdam at top elevation of 81. 5 m, are being built in 3 sections: the test section,the dumping section in advance and the main river section, including dumping under water, dumping in the dry, densifying the weathered sand by the vibrating and impacting method, and construction of the cut -off walls in the cofferdam bodies. The construction of the dumping in advance began on october 30, 1996, and by early July of 1997 an earth -rock backfill of 1, 945, 800 m3 has been completed, with densifying the weathered sand of 5, 761 m by the vibrating and impacting method, dumping materials from barges of 846, 400 m3 and trenching for the cut - off walls of 6, 500m2 as well. |
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| Keywords: | Three Gorges Project Second stage cofferdams Construction of dumping in advance Project item |
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