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沉管灌注桩因其施工速度快、现场干净、效果好而得到广泛应用,但在具体施工中有时会出现断桩与缩颈。若不能及时发现,不仅延误工期,而且技术处理非常繁杂。为防止出现断桩、缩颈,施工前必须试成孔,且数量不少于2个,以便核对地质资料。检验所选设备,确定施工工艺及技术要
The immersed tube cast-in-place pile has been widely used because of its fast construction speed, on-site cleanness, and good effect, but broken piles and necking sometimes occur in the concrete construction. If it cannot be discovered in time, it will not only delay the construction period, but also make the technical process complicated. In order to prevent the occurrence of broken piles and necking, holes must be tried before construction, and the number of holes shall be no less than 2 in order to check geological data. Check the selected equipment to determine the construction process and technology