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A platform for research: civil engineering, architecture and urbanism
Construction method of full-compaction type secondary soil-squeezing single-head expanded-base pile
The invention discloses a construction method of a full-compaction type secondary soil-squeezing single-head expanded-base pile. The method comprises the following steps of S1, paying off on site, placing a pile machine in place, and placing hard concrete at a pile position; S2, the inner pipe and the outer pipe are sleeved, the double pipes are tamped and sunk into a designed pile end bearing layer; S3, the inner pipe is pulled out, and concrete needed by the expanded-base section of the pile end is poured and then put into the inner pipe; S4, hammering the inner pipe by a pile hammer to extrude the concrete out of the outer pipe; S5, the inner pipe is pulled out, and the inner pipe is placed after pile body concrete is poured; S6, the inner pipe and the pile body concrete are tamped, andmeanwhile the outer pipe is pulled up; S7, the steps S5-S6 are repeated, and pile body concrete pouring and tamping are completed; and S8, the pile frame is translated, and the reinforcement cage ishoisted. The method has the characteristics of secondarily squeezing soil, compacting the concrete of the pile body, thoroughly eliminating the common quality problem of the formed pile, ensuring theintegrity of the pile body, improving the bearing capacity of a single pile and greatly saving the use amount of the concrete of the pile body.
本发明公开了一种全夯式二次挤土单头扩底桩的施工方法，包括以下步骤：S1：现场放线，桩机就位，在桩位处放置干硬性混凝土；S2：内外管双管套合，夯击双管，沉入设计桩端持力层；S3：抽出内管，灌注桩端扩底段所需的混凝土后放入内管；S4：桩锤锤击内管将混凝土夯挤出外管；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，同时上拔外管；S7：重复步骤S5～S6，完成桩身砼灌注与夯击；S8：平移桩架，起吊钢筋笼。本发明具有二次挤土及密实桩身砼，彻底消除成桩质量通病，保证桩体完整性特点，提高了单桩承载力，大量节省了桩体混凝土用量。
Construction method of full-compaction type secondary soil-squeezing single-head expanded-base pile
The invention discloses a construction method of a full-compaction type secondary soil-squeezing single-head expanded-base pile. The method comprises the following steps of S1, paying off on site, placing a pile machine in place, and placing hard concrete at a pile position; S2, the inner pipe and the outer pipe are sleeved, the double pipes are tamped and sunk into a designed pile end bearing layer; S3, the inner pipe is pulled out, and concrete needed by the expanded-base section of the pile end is poured and then put into the inner pipe; S4, hammering the inner pipe by a pile hammer to extrude the concrete out of the outer pipe; S5, the inner pipe is pulled out, and the inner pipe is placed after pile body concrete is poured; S6, the inner pipe and the pile body concrete are tamped, andmeanwhile the outer pipe is pulled up; S7, the steps S5-S6 are repeated, and pile body concrete pouring and tamping are completed; and S8, the pile frame is translated, and the reinforcement cage ishoisted. The method has the characteristics of secondarily squeezing soil, compacting the concrete of the pile body, thoroughly eliminating the common quality problem of the formed pile, ensuring theintegrity of the pile body, improving the bearing capacity of a single pile and greatly saving the use amount of the concrete of the pile body.
本发明公开了一种全夯式二次挤土单头扩底桩的施工方法，包括以下步骤：S1：现场放线，桩机就位，在桩位处放置干硬性混凝土；S2：内外管双管套合，夯击双管，沉入设计桩端持力层；S3：抽出内管，灌注桩端扩底段所需的混凝土后放入内管；S4：桩锤锤击内管将混凝土夯挤出外管；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，同时上拔外管；S7：重复步骤S5～S6，完成桩身砼灌注与夯击；S8：平移桩架，起吊钢筋笼。本发明具有二次挤土及密实桩身砼，彻底消除成桩质量通病，保证桩体完整性特点，提高了单桩承载力，大量节省了桩体混凝土用量。
Construction method of full-compaction type secondary soil-squeezing single-head expanded-base pile
一种全夯式二次挤土单头扩底桩的施工方法
LIU XIANGANG (author) / SHAO ZHONGXIN (author) / YUE PING (author) / LIU BIN (author)
2020-07-10
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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