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Construction method of all pounding type secondary soil-squeezing multi-head pedestal pile
The invention discloses a construction method of an all pounding type secondary soil-squeezing multi-head pedestal pile. The construction method comprises the following steps of S1, conducting on-sitesetting-out, arranging a pile machine in position, arranging hard concrete at the pile location to form a pipe port sealing section of about 0.5 m; S2, sleeving an inner tube and an outer tube, pounding the two tubes, sinking the two tubes to reach a designed bearing stratum of a pile tip expanding pedestal section; S3, pulling out the inner tube, filling pile tip expanding pedestal section concrete and then sinking the inner tube; S4, pounding out the pile tip expanding pedestal section concrete; S5, pulling out the inner tube, filling pile body concrete and then sinking the inner tube; S6,pounding the inner tube and the pile body concrete; S7, repeating the step S5-S6 to complete filling and pounding of the pile body concrete and pile body expanding pedestal section concrete; and S8, horizontally moving a pile frame, hoisting a reinforcement cage, and aligning a reinforcement cage pipe expanding, tamping and inserting device with the pile position. The construction method has the characteristics that common quality problems during pile sinking are eliminated, and the integrity of a pile body is ensured, the compression bearing capacity and pulling resistance of a single pile are improved, and consumption of the pile body concrete is saved a lot.
本发明公开了一种全夯式二次挤土多头扩底桩的施工方法，以下步骤：S1：现场放线，桩机就位，在桩位处放置干硬性混凝土，形成0.5m左右的管口密封段；S2：内外管双管套合，夯击双管，沉入达到桩端扩底段的设计持力层；S3：抽出内管，灌注桩端扩底段混凝土后放入内管；S4：夯出桩端扩底段混凝土，S5：抽出内管，灌注桩身混凝土后放入内管；S6：夯击内管及桩身混凝土；S7：重复步骤S5～S6，完成桩身及桩身扩底段砼灌注与夯击；S8：平移桩架，起吊钢筋笼，将钢筋笼扩桩及振插装置，对准桩位。本发明具有消除沉桩质量通病，保证桩体完整性特点，提高了单桩抗压承载力及抗拔力，大量节省了桩体混凝土用量。
Construction method of all pounding type secondary soil-squeezing multi-head pedestal pile
The invention discloses a construction method of an all pounding type secondary soil-squeezing multi-head pedestal pile. The construction method comprises the following steps of S1, conducting on-sitesetting-out, arranging a pile machine in position, arranging hard concrete at the pile location to form a pipe port sealing section of about 0.5 m; S2, sleeving an inner tube and an outer tube, pounding the two tubes, sinking the two tubes to reach a designed bearing stratum of a pile tip expanding pedestal section; S3, pulling out the inner tube, filling pile tip expanding pedestal section concrete and then sinking the inner tube; S4, pounding out the pile tip expanding pedestal section concrete; S5, pulling out the inner tube, filling pile body concrete and then sinking the inner tube; S6,pounding the inner tube and the pile body concrete; S7, repeating the step S5-S6 to complete filling and pounding of the pile body concrete and pile body expanding pedestal section concrete; and S8, horizontally moving a pile frame, hoisting a reinforcement cage, and aligning a reinforcement cage pipe expanding, tamping and inserting device with the pile position. The construction method has the characteristics that common quality problems during pile sinking are eliminated, and the integrity of a pile body is ensured, the compression bearing capacity and pulling resistance of a single pile are improved, and consumption of the pile body concrete is saved a lot.
本发明公开了一种全夯式二次挤土多头扩底桩的施工方法，以下步骤：S1：现场放线，桩机就位，在桩位处放置干硬性混凝土，形成0.5m左右的管口密封段；S2：内外管双管套合，夯击双管，沉入达到桩端扩底段的设计持力层；S3：抽出内管，灌注桩端扩底段混凝土后放入内管；S4：夯出桩端扩底段混凝土，S5：抽出内管，灌注桩身混凝土后放入内管；S6：夯击内管及桩身混凝土；S7：重复步骤S5～S6，完成桩身及桩身扩底段砼灌注与夯击；S8：平移桩架，起吊钢筋笼，将钢筋笼扩桩及振插装置，对准桩位。本发明具有消除沉桩质量通病，保证桩体完整性特点，提高了单桩抗压承载力及抗拔力，大量节省了桩体混凝土用量。
Construction method of all pounding type secondary soil-squeezing multi-head pedestal pile
一种全夯式二次挤土多头扩底桩的施工方法
LIU XIANGANG (author) / FU YUYING (author) / LIU BIN (author) / DAI WEIPING (author)
2020-07-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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