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土建外文資料翻譯---迪拜塔:工程世界的最高建筑-建筑結(jié)構(gòu)-資料下載頁

2025-05-12 14:34本頁面

【導(dǎo)讀】所有的超高層建筑,困難結(jié)構(gòu)工程問題需要處理和解決。迪拜塔的目標(biāo)不簡單的是世界的最高建筑,它是世界的最高愿望的體現(xiàn)。筑正在建造中,在2020年的夏天已經(jīng)達到了135層。這個建筑最后的高度是一個“非。常嚴(yán)守的秘密”。這個多功能的摩天大樓將超過當(dāng)前509m的臺北101大。阿瑪尼酒店、住宅和辦公室。的踏步是由排成一行的柱子上的墻提供的負(fù)荷。這允許建筑的建設(shè)沒有與柱子移動有關(guān)。系這方面的困難。這樣交錯的組織格局以致塔的每一個交錯處的寬度改變。塔和矮墻結(jié)構(gòu)正在建造當(dāng)中,這個建筑計劃在2020年竣工。墻的優(yōu)勢來自于C80到C60強度的混凝土和普通的水泥、粉煤灰的利用。寸控制滿足自重應(yīng)力的匹配列入內(nèi)部走廊墻壁。載的作用下,結(jié)構(gòu)的變形量通常低于一般標(biāo)準(zhǔn)。動態(tài)分析表明第一模式是周期為。在立方體試塊測驗中利用熱電偶,巖相分析后進行檢查。樁的承受能力為3000噸,塔樁荷載試驗超過6000噸。在2020年實施的橫向抽水試驗,相當(dāng)于泵送到600m高

  

【正文】 the vertical elements is determined by the requirements for a pressive strength of 10 MPa at 10 hours to permit the construction cycle and a design strength/modulus of 80 MPa/44 GPa, as well as ensuring adequate pumpability a nd workability. The ambient conditions in Dubai vary from a cool winter to an extremely hot summer, with maximum temperatures occasionally exceeding 50 176。C. To acmodate the different rates of strength development and workability loss, the dosage and retardation level is adjusted for the different seasons. Ensuring pumpability to reach world record heights is probably the most diffi cult concrete design issue, particularly considering the high summer temperatures. Four separate basic mixes have been developed to enable reduced pumping pressure as the building gets higher. A horizontal pumping trial equivalent to the pressure loss in pumping to a height of 600 m (1970 ft) was conducted in February 2020 to determine the pumpability of these mixes and establish the friction coeffi cients. The current concrete mix contains 13% fl y ash and 10% silica fume with a maximum aggregate size of 20 mm (3/4 in.). The mix is virtually selfconsolidating with an average slump fl ow of approximately 600 mm (24 in.), and will be used until the pumping pressure exceeds approximately 200 bar. It is envisaged to change to a mix containing 14 mm maximum aggregate size and 20% fl y ash with full selfconsolidating characteristics while maintaining the required 80 MPa. Above Level 127, the structural requirement reduces to 60 MPa, and a mix containing 10 mm maximum aggregate may be used. Extremely high levels of quality control will be required to ensure pumpability up to the highest concrete fl oor, particularly considering the ambient temperatures. The pumps on site include two of the largest in the world, capable of concrete pumping pressure up to a massive 350 bars through a highpressure 150 mm pipeline. 5. CONSTRUCTION The Burj Dubai utilizes the latest advancements in construction techniques and material technology. The walls are formed using Doka’s SKE 100 automatic selfclimbing formwork system (Figure 19). The circular nose columns are formed with steel forms, and the fl oor — 48 — slabs are poured on MevaDec formwork. Wall reinforcement is prefabricated on the ground in 8 m sections to allow for fast placement. The construction sequence for the structure has the central core and slabs being cast fi rst, in three sections。 the wing walls and slabs follow behind。 and the wing nose columns and slabs follow behind these (Figure 1). Concrete is pumped via specially developed Putzmeister pumps, able to pump to heights of 600 m (1970 ft) in a single stage and generate 350 bar pressure. Due to the limitations of conventional surveying techniques, a special GPS monitoring system has been developed to monitor the verticality of the structure. The construction survey work is being supervised by Mr Doug Hayes, Chief Surveyor for the Burj Dubai Tower, with the Samsung BeSix Arabtech JV. 6. CONCLUSION When pleted, the Burj Dubai Tower will be the world’s tallest structure. It represents a signifi cant achievement in terms of utilizing the latest design, materials, and construction technology and methods, in order to provide an effi cient, rational structure to rise to heights never before seen.
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