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    蘇州混凝土水泥制品研究院有限公司

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    第六期

    回填連砂石層開挖大直徑人工挖孔樁施工方法簡介
    回填連砂石層開挖大直徑人工挖孔樁施工方法簡介
    • 林 強,曲貴陽,程 軍,郭 睿
    2011年第6期
    摘要
    引用本文
    摘 要:通過實際工程,介紹了在5m連砂石回填層,即土質疏松、地下水較為豐富、地質條件不穩定的地基中開挖大直徑人工挖孔樁的施工方法及施工注意事項。運用在已開挖樁孔段土壁內沿著四周打入斜向鋼筋,并將鋼筋澆注于樁護壁混凝土中等方法,可有效保證回填層中樁孔的開挖施工安全。 Abstract:Through the practical engineering, construction methods and attentions of large diameter artificial digging piles in 5m sandstone backfill layers, which is the foundation with the loose soil, rich groundwater and unstable geology characteristic are introduced. The oblique reinforcement is digged around into the wall of digged piles, and the methods that pile wall concrete is poured by reinforcement can efficiently ensure the excavation construction safety for pile holes in backfill layers.
    三摻技術在大體積混凝土中的應用
    三摻技術在大體積混凝土中的應用
    • 李巧玲
    2011年第6期
    摘要
    引用本文
    摘 要:以河南平頂山某大廈基礎工程大體積混凝土澆筑實際工程為例,介紹了UEA微膨脹劑、JKR復合減水劑及粉煤灰三摻技術在該工程中的應用情況。從原材料、配合比設計、施工管理、質檢等方面進行全過程控制,取得了良好的技術及經濟效益。 Abstract: As the practical engineering of mass concrete grouting for a building basis project of Pingding mountain in Henan for an example, the tri-mixture technology of UEA micro-expansion agent, JKR composite water reducer and fly ash are introduced for the application on this engineering. Through the total process controlling from material, mix proportion design, construction management and quality testing, good technology and economic profit are acquired.
    聚氨酯彈性混凝土在連霍高速橋面伸縮縫病害維修中的應用
    聚氨酯彈性混凝土在連霍高速橋面伸縮縫病害維修中的應用
    • 陳會凡,鄧苗義
    2011年第6期
    摘要
    引用本文
    摘 要: 介紹了聚氨酯彈性混凝土在連霍高速公路三門峽段K851+900(南幅)及K791+900(南幅)的全厚度及半厚度修補工作中的應用情況,提出了施工過程中應注意的問題。聚氨酯彈性混凝土具有良好的彈性變形能力,通過自身的彈性變形,可以較好地耗散車輪的動態沖擊作用,具有優越的抗沖擊能力。將聚氨酯彈性混凝土應用于橋面伸縮縫的病害維修中,既能夠減少交通中斷時間,又能降低維修成本。 Abstract: The applications of polyurethane elastic concrete for through-thickness repairing and half-thickness repairing in Lianhuo expressway Sanmenxia K851+900 (southern sheet) and K791+900 (southern sheet) are introduced, and problems which should pay attention during the construction process are proposed. The polyurethane elastic concrete has good elastic deformation capacity, through the self-elastic deformation, the dynamic impact role of wheels can be better dissipated by the polyurethane elastic concrete, and it also has super impact resistance capacity. The application of polyurethane elastic concrete in repairing disease of expansion joint for bridge can not only reduce traffic disruption time, but also decrease maintenance cost.
    地下室混凝土長墻帶模養護的抗裂對策
    地下室混凝土長墻帶模養護的抗裂對策
    • 王瀟洲
    2011年第6期
    摘要
    引用本文
    摘 要:以某地下室混凝土長墻澆筑溫控施工為例,闡述了混凝土墻體在施工前應確定溫控指標以及制定溫控施工的綜合技術措施。通過對混凝土墻體溫控指標計算分析,提出了混凝土超長墻體合理留置后澆帶間距、帶模保溫養護的“放”、“防”結合的抗裂對策,是保證混凝土長墻施工質量的關鍵。 Abstract: Based on the example of the construction of long concrete wall pouring and temperature controlling of a basement, the works on fixing the indexes of temperature controlling and establishing complex technique measures of temperature controlling construction before the construction of concrete wall are described. Through the computational analysis on the indexes of temperature controlling of concrete wall, the countermeasures of crack-resisting “to release” and “to resist” are put forward.“To release” means reasonably reserving space for post-pouring belts in over-long concrete wall, and “To resist” means that concrete wall is curing insulation with mold. The countermeasures are the keys to guarantee the construction quality of long concrete wall.
    對"強柱弱梁"屈服機制的分析
    對"強柱弱梁"屈服機制的分析
    • 周軍文,齊永勝,魯良輝
    2011年第6期
    摘要
    引用本文
    摘 要:對鋼筋混凝土框架結構的強柱弱梁設計原則進行了分析,結合工程實際震害,得出梁端超配筋現象是影響強柱弱梁的一個重要因素,歸納了造成梁端超配筋的原因,并結合工程實例具體說明梁端超配筋的形成過程,就設計過程中如何實現強柱弱梁提出了建議。 Abstract: The design principles of strong column and weak beam of reinforced concrete frame structure are analyzed. According to a project damage, it’s found that the super reinforcement phenomenon is an important factor effecting strong column and weak beam, and the reasons causing super reinforcement are summed up. Combined with the engineering practice, the details of forming process of the girder super reinforcement are introduced, and how to realize the strong column and weak beam in the design process is proposed.
    陶粒砂輕混凝土的制備及性能
    陶粒砂輕混凝土的制備及性能
    • 李明利
    2011年第6期
    摘要
    引用本文
    摘 要:陶粒砂輕混凝土是一種比較理想的建筑材料,具有輕質、保溫、吸聲、隔熱等優點,已廣泛應用于各種工業與民用建筑。本文利用陶粒作為骨料,陶砂部分替代天然砂及其它常規材料,配制出陶粒砂輕混凝土,并對配制的混凝土的物理力學性能進行了測試。結果表明,該混凝土干密度較普通混凝土低,物理力學性能優越,能夠滿足工程需要。 Abstract: Ceramisite concrete is a sort of ideal building material with the advantages of light weight, thermal insulation, sound absorption and heat insulation, which is widely used in industrial and civilian constructions. In this paper, using ceramisite as aggregate and ceramic sand instead of nature river sand and other common-used materials to produce ceramic sand light-weight concrete is studied. And the physical and mechanical performances of this kind of concrete are tested. The results show that the dry density of ceramic sand light-weight concrete is lower than general concrete, and the physical and mechanical performances of this kind of concrete are superior, which can meet the demands of practical engineering.
    鋼梁-混凝土墻剛接節點低周反復荷載作用下的受力性能試驗研究
    鋼梁-混凝土墻剛接節點低周反復荷載作用下的受力性能試驗研究
    • 覃銀輝1,劉文吉2,劉付華3
    2011年第6期
    摘要
    引用本文
    摘 要:對3個鋼梁-混凝土墻剛接節點試件進行了低周反復荷載試驗,分析了節點核心區鋼梁腹板、鋼梁翼緣、連接板、封口板、牛腿腹板、牛腿翼緣、分布鋼筋、型鋼暗柱等的應力應變關系。試驗結果顯示,在加載過程中,鋼梁翼緣和腹板、牛腿翼緣均產生了屈服變形,但是封口板、牛腿腹板、分布筋、型鋼暗柱都沒有屈服,在設計時應加強鋼梁翼緣和腹板、牛腿翼緣。同時試驗結果也顯示在實際工程中可按懸臂梁模型對牛腿進行設計。 Abstract: Three steel beam-concrete wall rigid node specimens are tested by low-cycle repeated loading. The stress-strain relationships of steel beam web, beam flange, connecting plate, sealing plate, bracket web, bracket flange, distributing steel, concealed column in node core area are all analyzed. The results show that in the loading process, steel beam flange and web, bracket flange all appeared yield deformation, but the sealing plate, bracket web, distributing steel and concealed column didn’t yield, so the steel beam flange and web, bracket flange must be strengthened during the design. The test results also show that the bracket can be designed as cantilever model in practical engineering.
    聚乙烯醇纖維增韌水泥基復合材料研究進展
    聚乙烯醇纖維增韌水泥基復合材料研究進展
    • 徐濤智1,楊醫博1,2,梁穎華1,郭文瑛1
    2011年第6期
    摘要
    引用本文
    摘 要:聚乙烯醇纖維增韌水泥基復合材料(Polyvinyl alcohol Fiber-Engineered Cementitious Composites簡稱PVA-ECC)是一種拉伸變形性能優異的水泥基復合材料,是通過斷裂力學和微觀力學原理對材料體系進行系統設計和優化得到的復合材料。本文介紹了國內外PVA-ECC的研究情況,并對國產PVA纖維無法應用于PVA-ECC的原因以及PVA-ECC直接拉伸實驗方法兩個亟待解決的問題進行了論述。 Abstract:Polyvinyl Alcohol Fiber-Engineered Cementitious Composites (PVA-ECC) is a kind of cement-based composite material with extraordinary tensile deformation performance, which is a composite material systemically designed and optimized by fracture mechanics and micro-mechanics principles. The research situations of PVA-ECC in China and abroad are introduced, and two waiting solving problems such as the reason that PVA fiber cannot be applied to PVA-ECC in China and the direct tensile testing method for PVA-ECC are discussed.
    超短超細鋼纖維對水泥砂漿性能的影響對比
    超短超細鋼纖維對水泥砂漿性能的影響對比
    • 石 飛1,應文宗1,彭 毅2,王龍飛2
    2011年第6期
    摘要
    引用本文
    摘 要:在砂漿中分別摻入11種不同比例的熔抽型超短超細鋼纖維,并與相同摻量的剪切型超短超細鋼纖維增強水泥砂漿進行了性能對比。結果表明,二種超短超細鋼纖維的摻入均可提高水泥漿體的抗折強度、抗壓強度和韌性,但熔抽型超短超細鋼纖維對水泥砂漿的增強增韌作用高于剪切型超短超細鋼纖維,并存在顯著的纖維增強幾何尺寸效應。 Abstract: Eleven kinds of different proportion of melting extracted extra-short and extra-fine steel fiber are added into mortar, and it is compared with the performances of shearing extra-short and extra-fine steel fiber reinforced mortar with the same dosage. The results show that two kinds of extra-short and extra-fine steel fiber can both improve flexural strength, compressive strength and toughness of cement pastes. The enhanced intensity and toughness of cement pastes with melting extracted extra-short and extra-fine steel fiber are better than the ones with shearing extra-short and extra-fine steel fiber, and the remarkable effects of fiber reinforcing geometric sizes of melting extracted extra-short and extra-fine steel fiber are existed.
    方形鋼管混凝土局部屈曲有限元分析
    方形鋼管混凝土局部屈曲有限元分析
    • 金雪峰1,袁丹鳳2,劉隆定1
    2011年第6期
    摘要
    引用本文
    摘 要:應用通用有限元程序,對方形空鋼管、方形鋼管混凝土兩種不同構件進行了特征值屈曲分析,研究了該兩種不同構件的屈曲模式及臨界屈曲應力,并與試驗研究成果及理論分析結果進行了比較,結果吻合良好。 Abstract: Finite element analysis (FEA) of eigenvalue method are used to study the buckling modes and the critical buckling stress of steel plates in the hollow box columns and the concrete-filled steel box columns. Comparison of theoretical analysis, FEA and experimental results are well anastomosed.
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