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铁路工程中的许多结构,如深水或强透水性土体中的桥梁墩台深水基础工程,多采用钢围堰法配合水下封底混凝土技术施工。堰内封底混凝土的厚度计算通常采用浮力和强度公式计算,所得结果偏大,造成大量建筑材料浪费。本文充分考虑钢围堰施工工艺的特殊性,充分挖掘桩基、钢护筒、围堰体等构造约束封底混凝土层的潜力,取得了比较好的结果,有效降低了封底混凝土厚度,提高了施工安全性。
Many structures in railway engineering, such as deep-water or strong water-permeable soil, are used in the construction of deep-water bridges and piers in deep soil. The calculation of the thickness of back concrete in the weir is usually calculated by the formula of buoyancy and strength, and the result is too large, resulting in a lot of waste of construction materials. In this paper, we fully consider the particularity of steel cofferdam construction technology, fully excavate the potential of confining backseal concrete layer, such as pile foundation, steel casing and cofferdam body, and achieve better results, effectively reducing the thickness of backseason concrete and improving the construction safety.