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補償收縮混凝土在某地下工程超長無縫施工技術

作者:唐蘇滇1,王德民2,錢晉玉3,王曄4

關鍵字:補償,收縮,混凝土,在某,地下,工程,超長,無縫,

 
(1.蘇州市時代工程咨詢設計管理有限公司,江蘇 蘇州  215007;2.武漢三源特種建材有限責任公司,湖北 武漢  430000;
3.蘇州市工業園區建設工程質量安全監督站,江蘇 蘇州  215027;4.啟東建筑集團有限公司,江蘇 南通  226200)
摘要:采用氧化鈣-氧化鎂雙膨脹源的高性能膨脹劑配制補償收縮混凝土,取消了所有后澆帶與伸縮縫,實現了地下混凝土工程的超長無縫施工技術。同時結合相應的施工技術措施,工程取得了良好的抗裂和自防水效果。實體結構監測數據表明,不同的結構位置其實際變形量大小不同,膨脹加強帶應設置在結構變形較大處,且膨脹性能指標需相應提高,各結構部位在覆土回填后內部變形量和溫度漸趨穩定。
關鍵詞:補償收縮混凝土;氧化鈣-氧化鎂雙膨脹源;地下工程;超長無縫施工技術
中圖分類號:TU528.32        文獻標識碼:A        文章編號:1001-702X(2019)05-0120-04
 
Application of shrinkage-compensating concrete in an underground structure with
ultra-long jointless construction technology
TANG Sudian1,WANG Demin2,QIAN Jinyu3,WANG Ye4
(1.Times Engineering Design and Project Management Co. Ltd.,Suzhou 215007,China;
2.Wuhan Sanyuan Special Building Materials Co. Ltd.,Wuhan 430000,China;
3.Suzhou Industrial Park of Construction Quality and Safety Supervision Station,Suzhou 215027,China;
4.Qidong Construction Group Co. Ltd.,Nantong 226200,China)
Abstract:Shrinkage-compensating concrete prepared by calcium oxide(CaO) and magnesium oxide(MgO) double expansive resources of high performance expansive agent achieved the ultra-long jointless construction technology of underground engineering with no late poured band and expansion joint. With implementation of technical measures,crack-free and self-waterproof structures have been successfully built. Entity data monitoring concluded that the deformation was not same in different structures. Expansion reinforcing band should be put in the structures with more deformation,and expansion property index need correspondingly increased. Internal deformation and temperature of each structure tended to be stable after backfilling soil.
Key words:shrinkage-compensating concrete,CaO-MgO double expansive resources,underground engineering,ultra-long jointless construction technology

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