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A platform for research: civil engineering, architecture and urbanism
Larsen steel sheet pile and high-pressure jet grouting pile combined cofferdam construction method
The invention relates to the technical field of steel sheet pile cofferdam construction, and particularly provides a Larsen steel sheet pile and high-pressure jet grouting pile combined cofferdam construction method. The construction method comprises the following steps that cement paste is jetted on a sludge stratum in a designed foundation pit to form cement board blocks; positioning piles are welded to pile foundation steel casings in the designed foundation pit; brackets are welded to the outer sides of the positioning piles, enclosing purlins are installed at the tops of the brackets to serve as inner guide frames, outer guide frames are arranged on branch trestle steel pipes, and installation positions are formed between the inner guide frames and the outer guide frames; steel sheet piles are hoisted, the ends of the steel sheet piles penetrate through the installation positions, the steel sheet piles vertically penetrate through the sludge stratum and reach a coarse gravel soil layer, inserting and driving of all the steel sheet piles are completed, and a cofferdam is formed; water is pumped into the cofferdam to the elevation position of a riverbed surface, and inner supports are installed; and underwater mud suction operation is conducted to form a foundation pit, concrete bottom sealing is conducted when a riverbed in the cofferdam descends to be below the bottom surface elevation of bottom sealing concrete, and water pumping is conducted after the strength of the bottom sealing concrete reaches the designed strength.
本公开涉及钢板桩围堰施工技术领域，具体提供了一种拉森钢板桩与高压旋喷桩组合围堰施工工法。该施工工法包括以下步骤：在设计基坑内淤泥地层喷射水泥浆形成水泥板结块；在设计基坑内的桩基钢护筒上焊接定位桩；在定位桩外侧焊接牛腿，牛腿顶部安装围檩作为内导向架，并在支栈桥钢管上设置外导向架，内导向架与外导向架之间形成安装位；将钢板桩吊起，钢板桩的端部穿过安装位，使得钢板桩垂直穿透淤泥层并到达粗圆砾土层，完成全部钢板桩插打，形成围堰；将围堰内抽水至河床面标高位置处，安装内支撑；进行水下吸泥作业形成基坑，待围堰内河床降到封底混凝土底面标高以下时进行混凝土封底，待封底混凝土强度达到设计强度后，进行抽水。
Larsen steel sheet pile and high-pressure jet grouting pile combined cofferdam construction method
The invention relates to the technical field of steel sheet pile cofferdam construction, and particularly provides a Larsen steel sheet pile and high-pressure jet grouting pile combined cofferdam construction method. The construction method comprises the following steps that cement paste is jetted on a sludge stratum in a designed foundation pit to form cement board blocks; positioning piles are welded to pile foundation steel casings in the designed foundation pit; brackets are welded to the outer sides of the positioning piles, enclosing purlins are installed at the tops of the brackets to serve as inner guide frames, outer guide frames are arranged on branch trestle steel pipes, and installation positions are formed between the inner guide frames and the outer guide frames; steel sheet piles are hoisted, the ends of the steel sheet piles penetrate through the installation positions, the steel sheet piles vertically penetrate through the sludge stratum and reach a coarse gravel soil layer, inserting and driving of all the steel sheet piles are completed, and a cofferdam is formed; water is pumped into the cofferdam to the elevation position of a riverbed surface, and inner supports are installed; and underwater mud suction operation is conducted to form a foundation pit, concrete bottom sealing is conducted when a riverbed in the cofferdam descends to be below the bottom surface elevation of bottom sealing concrete, and water pumping is conducted after the strength of the bottom sealing concrete reaches the designed strength.
本公开涉及钢板桩围堰施工技术领域，具体提供了一种拉森钢板桩与高压旋喷桩组合围堰施工工法。该施工工法包括以下步骤：在设计基坑内淤泥地层喷射水泥浆形成水泥板结块；在设计基坑内的桩基钢护筒上焊接定位桩；在定位桩外侧焊接牛腿，牛腿顶部安装围檩作为内导向架，并在支栈桥钢管上设置外导向架，内导向架与外导向架之间形成安装位；将钢板桩吊起，钢板桩的端部穿过安装位，使得钢板桩垂直穿透淤泥层并到达粗圆砾土层，完成全部钢板桩插打，形成围堰；将围堰内抽水至河床面标高位置处，安装内支撑；进行水下吸泥作业形成基坑，待围堰内河床降到封底混凝土底面标高以下时进行混凝土封底，待封底混凝土强度达到设计强度后，进行抽水。
Larsen steel sheet pile and high-pressure jet grouting pile combined cofferdam construction method
拉森钢板桩与高压旋喷桩组合围堰施工工法
YANG JINWEN (author) / LIU BIN (author) / FAN GUOLIANG (author) / ZHANG XUDONG (author) / MA BAOLI (author) / LYU ZHIJUN (author) / ZHANG WEIYING (author) / CHENG ZHENGMIN (author) / YU DENGCHENG (author)
2021-07-02
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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