高強預應力混凝土管樁液壓法施工.doc
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高強預應力混凝土管樁液壓法施工
上世紀90年代以來，在上海、江蘇沿海灘涂和軟土地區，高強度預應力混凝土管樁已被推廣應用于房屋建筑和橋梁、碼頭等工程中。軟土地基廣泛采用預制樁基礎，用柴油錘擊入樁時噪聲大且拌有濃煙油污，尤其在市區和居民區旁的施工中，有悖于環境和文明施工要求。以液壓法壓入式施工樁工藝替代錘擊，既無噪聲也對環境無任何污染，具有廣泛的應用前景。本文以上海浦東國際機場二期工程北燈光站、昆山淀山湖大自然國際俱樂部工程的樁基工程為例，介紹高強度預應力混凝土管樁的施工方法、設計、施工中應注意的事項及適用條件以及樁的質量控制。
一、工程概況
上海浦東國際機場二期工程北燈光站工程框架結構1層，高度6．6m。位于上海市浦東機場海濱地帶，地質狀況：地面以下2．5-3.5m為機械吹填海砂層，地表平坦，砂層往下為淤泥層，屬沖刷和淤泥環境沉積類型。第四紀軟土厚度較大，特別是第二層的淤泥層，厚度達7．5-11．2m，層面為極具特色的濱海
Prestressed concrete pipe hydraulic construction method
Since the 90s of last century, in Shanghai, Jiangsu coastal beach and the soft soil areas, high-strength prestressed concrete has been applied to housing construction and bridges, piers and other projects. Soft extensive use of prefabricated pile foundation, diesel pile hammer into the mix when the noise is large and there is smoke oil, especially in urban areas and residential areas adjacent to the construction, contrary to the environmental and construction requirements of civilization. Press-in method to the construction of hydraulic pile hammer replacement process, neither noise, no pollution on the environment also has broad application prospects. In this paper, the second phase of Shanghai Pudong International Airport, North Light Station, Kunshan International Club Dianshan nature works foundations as an example, high strength prestressed concrete pipe construction method, design, construction and application precautions conditions and the pile of quality control.
First, project survey
Shanghai Pudong International Airport Phase II North Light Station in frame 1, layer height 6.6m. Shanghai Pudong airport is located in coastal areas, geological conditions: 2.5-3.5m below the surface for mechanical blowing sand reclamation, surface flat, sand down the mud layer, is a type of erosion and silt deposition environment. Quaternary thick soft soil, especially in the second layer of mud layer thickness of 7.5-11.2m, for the very unique aspects of coastal