Deep mucky riverbed pipe gallery river crossing dual-steel-plate pile cofferdam structure and construction method

Abstract

The invention relates to a deep mucky riverbed pipe gallery river crossing dual-steel-plate pile cofferdam structure; upstream and downstream of a river are provided with dual-steel-plate piles; each dual-steel-plate pile is enclosed by two lines of Larsen steel plate piles, the inner parts of the Larsen steel plate piles are connected through channel steel circuit purlin split bolts and a tie bar; adjacent Larsen steel plate piles are connected through a lock opening; the riverbed sludge between two steel plate piles is compacted and grouted to form compaction grouting soil; the inside walls of the dual-steel-plate piles are provided with the channel steel circuit purlin split bolt; one layer of anti-seepage film is arranged at inside of each dual-steel-plate pile, and a layer of bagged soil closes to the anti-seepage film; ash mixing soil is filled between the dual-steel-plate piles layer by layer. The deep mucky riverbed pipe gallery river crossing dual-steel-plate pile cofferdam structure has the beneficial effects that on the basis of waterproof dual-steel-plate piles, the ash mixing soil core with good anti-seepage ability is arranged between dual-steel-plate piles; the anti-seepage film is further arranged; the substrate of the ash mixing soil core is compacted and grouted to further improve the substrate waterproof effect, thus the waterproof effect of the whole cofferdam is improved through multiple waterproof effects.

Description

technical field [0001] The invention belongs to the field of cofferdam engineering, and in particular relates to a double steel sheet pile cofferdam structure and construction method for deep muddy riverbed pipe gallery crossing rivers, which is suitable for the construction of double steel sheet pile cofferdams for deep muddy riverbeds, especially for pipe gallery crossing rivers Cofferdam construction. Background technique [0002] With the development of the economy and the progress of society, the advantages of comprehensive utility corridors over traditional pipeline construction have been increasingly recognized by the public, and the country and localities are vigorously promoting the construction of urban comprehensive utility corridors. Due to the dense river network in the coastal area, the construction of pipe corridors inevitably has to cross the river, requiring cofferdam construction, and often encounters deep rivers and deep muddy riverbeds. The bearing capaci...

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Problems solved by technology

[0003] To sum up, the traditional cofferdam structure and construction method of the pipe gallery crossing the river has problems such as insufficient stability and anti-seepage ability, hi

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