人民黃河
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深埋水工隧洞復合凍結施工關鍵技術研究
 陳曉東
(甘肅省水利水電勘測設計研究院有限責任公司,甘肅 蘭州 730000)
Research on Key Technology of Composite Freezing Construction of Deep Buried Hydraulic Tunnel
 CHEN Xiaodong
(Gansu Survey and Design Institute Co., Ltd., of Water Resources and Hydropower, Lanzhou 730000, China)

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人民黃河
  2019,Vol. 41(9): 137
  工程建設管理
深埋水工隧洞復合凍結施工關鍵技術研究
 陳曉東
(甘肅省水利水電勘測設計研究院有限責任公司,甘肅 蘭州 730000))
doi:
Research on Key Technology of Composite Freezing Construction of Deep Buried Hydraulic Tunnel
 CHEN Xiaodong
(Gansu Survey and Design Institute Co., Ltd., of Water Resources and Hydropower, Lanzhou 730000, China)
全文: PDF (2.22MB)
摘要: 引洮供水一期工程總干渠7號隧洞中部,長48.0 m、埋深244.0 m洞段穿越新近系含水疏松粉(細)砂極軟巖地層,采用一次全深凍結豎井工作面,單循環“地面垂直+洞內水平復合凍結法”掘進。為掌握深埋地層凍結設計與施工技術,結合工程實踐,對含水疏松粉(細)砂巖工程地質特性,以及“復合凍結法”設計、溫度場、制冷系統與施工等關鍵技術進行了研究。“復合凍結法”掘進安全通過極軟巖地層,獲得全面成功,取得重大技術突破與創新,填補了國內200.0 m以上深埋隧洞(隧道與巷道)洞內“水平凍結”工法技術的空白,開創了國內深埋水工隧洞“凍結法”施工技術的先導開端,標志著我國地下工程建設“凍結法”設計與施工技術全面躍上新臺階。
關鍵詞:
Abstract: In the middle part of No. 7 tunnel of the main canal of the first stage of Taohe River Water Diversion Project, the length is 48.0 m and the buried depth is 244.0 m. It passes through the Neogene waterbearing loose silt (fine) sand and very soft rock strata and adopts a fully deep frozen shaft face and single cycle “vertical ground + horizontal compound freezing method in tunnel” tunneling. For the purpose of freezing design and mastering construction technology in deep buried strata, combined with engineering practice, the engineering geological characteristics of waterbearing loose silt (fine) sandstone and the design of “composite freezing method”, the temperature field were studied. The key technologies such as refrigeration system and construction were studied. The “compound freezing method” could safely pass through the very soft rock strata, and achieved great technical breakthrough and innovation, thus filling the gap of “horizontal freezing” technique in the deep buried tunnels above 200.0 m in our country. The construction technology of “freezing method” for deep buried hydraulic tunnel in China has been initiated, which indicates that the design and construction technology of “freezing method” for underground engineering construction in our country has leaped to a new level in an allround way.
Key words: deep buried hydraulic tunnel; waterbearing loose powder (fine) sandstone; composite freezing; key technology
收稿日期:
基金資助: 國家重點研發計劃項目(2016YFC0401802)
作者簡介: 陳曉東(1964—),男,甘肅會寧人,教授級高級工程師,主要從事水利水電工程規劃設計工作
江苏7位数开奖历史