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A platform for research: civil engineering, architecture and urbanism
Rotary excavating bottom expanding and full-rotation positioning construction method for foundation pit reverse construction method
The invention discloses a rotary excavating bottom expanding and full-rotation positioning construction method for a foundation pit in a reverse construction method, and belongs to the technical field of cast-in-place pile construction in the reverse construction method. Comprising the steps that S1, a rotary drilling rig is adopted for rotary drilling; s2, the full-slewing drilling machine is installed in place; s3, a reinforcement cage is manufactured and hoisted; s4, steel pipe piles are hoisted and positioned; s5, hole cleaning and pile body concrete filling are carried out; s6, backfilling the periphery of the steel pipe column; and S7, pile hole backfilling. The step S1 comprises the following steps: S11, drilling a rotary excavating straight hole section; and S12, bottom expanding drilling is conducted on the rotary excavating pile end. Compared with the prior art, firstly, the pile bearing capacity of the cast-in-place pile formed through the construction method is higher, the hole depth is greatly reduced, and the hole forming quality and the pile forming quality are more reliable; secondly, double-layer bidirectional positioning is carried out on the steel pipe column through the full-slewing drilling machine in the downward moving process, positioning is faster and more accurate, and the construction efficiency is greatly improved; and finally, the construction method is simple in process, convenient to construct, and convenient to popularize and use.
本发明公开了一种基坑逆作法旋挖扩底、全回转定位施工方法，属于逆作法灌注桩施工技术领域。包括有步骤S1：采用旋挖钻机进行旋挖钻孔；S2：全回转钻机安装就位；S3：制作并吊放钢筋笼；S4：进行钢管桩的吊放和定位；S5：清孔及灌注桩身混凝土；S6：钢管柱四周回填；S7：桩孔回填。所述步骤S1包括有以下步骤：S11：旋挖直孔段钻进；S12：旋挖桩端扩底钻进。与现有技术相比，首先，本施工方法所成型的灌注桩的桩承载力更强，孔深大大减小，成孔、成桩质量更为可靠；其次，钢管柱在下方过程中通过全回转钻机进行双层双向定位，定位更加快捷、准确，大大提升了施工效率；最后，本施工方法工艺简单、施工方便，便于推广和使用。
Rotary excavating bottom expanding and full-rotation positioning construction method for foundation pit reverse construction method
The invention discloses a rotary excavating bottom expanding and full-rotation positioning construction method for a foundation pit in a reverse construction method, and belongs to the technical field of cast-in-place pile construction in the reverse construction method. Comprising the steps that S1, a rotary drilling rig is adopted for rotary drilling; s2, the full-slewing drilling machine is installed in place; s3, a reinforcement cage is manufactured and hoisted; s4, steel pipe piles are hoisted and positioned; s5, hole cleaning and pile body concrete filling are carried out; s6, backfilling the periphery of the steel pipe column; and S7, pile hole backfilling. The step S1 comprises the following steps: S11, drilling a rotary excavating straight hole section; and S12, bottom expanding drilling is conducted on the rotary excavating pile end. Compared with the prior art, firstly, the pile bearing capacity of the cast-in-place pile formed through the construction method is higher, the hole depth is greatly reduced, and the hole forming quality and the pile forming quality are more reliable; secondly, double-layer bidirectional positioning is carried out on the steel pipe column through the full-slewing drilling machine in the downward moving process, positioning is faster and more accurate, and the construction efficiency is greatly improved; and finally, the construction method is simple in process, convenient to construct, and convenient to popularize and use.
本发明公开了一种基坑逆作法旋挖扩底、全回转定位施工方法，属于逆作法灌注桩施工技术领域。包括有步骤S1：采用旋挖钻机进行旋挖钻孔；S2：全回转钻机安装就位；S3：制作并吊放钢筋笼；S4：进行钢管桩的吊放和定位；S5：清孔及灌注桩身混凝土；S6：钢管柱四周回填；S7：桩孔回填。所述步骤S1包括有以下步骤：S11：旋挖直孔段钻进；S12：旋挖桩端扩底钻进。与现有技术相比，首先，本施工方法所成型的灌注桩的桩承载力更强，孔深大大减小，成孔、成桩质量更为可靠；其次，钢管柱在下方过程中通过全回转钻机进行双层双向定位，定位更加快捷、准确，大大提升了施工效率；最后，本施工方法工艺简单、施工方便，便于推广和使用。
Rotary excavating bottom expanding and full-rotation positioning construction method for foundation pit reverse construction method
一种基坑逆作法旋挖扩底、全回转定位施工方法
LEI BIN (author) / LI CHAO (author) / ZHENG LEI (author) / FENG DONGDONG (author) / BAO WANWEI (author) / LIN GUISEN (author) / WANG ZHENWEI (author) / WANG TAO (author) / ZHOU MINGJIA (author) / HAN KAI (author)
2022-07-22
Patent
Electronic Resource
Chinese
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