Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for variable-section composite pile
The invention discloses a construction method for a variable-section composite pile, and is suitable for processing soft soil foundations. The construction operation of the construction method comprises the following steps of: a: flattening a place, and carrying out bidirectional stirring pile machine positioning; b: enabling the stirring pile machine to downwards drill to carry out guniting and stirring on a soil body; c: lifting the stirring pile machine, continuously stirring cement soil to the ground surface or to a position which is higher than an elevation for 50 cm or above, repeating band c to finish a lower part pile body of a variable-section stirring pile; d: elongating the vanes of a stirrer, and applying to a stirring pile expansion head part; e: finishing variable-section stirring pile construction; and f: when the constructed variable-section stirring pile is not hardened, applying a variable-section reinforced concrete precast pile with the expansion head by a vibratedpipeline sinking method on the center of the constructed variable-section stirring pile. The construction method disclosed by the invention fully combines the diameter expansion technologies of a single rigid pile and a stirring pile, so that the construction method has dual advantages of a variable section and a stiff composite pile, pile body bearing capacity can be effectively improved, a pileinterval is increased, engineering cost is lowered, and the construction method has a wide application prospect.
本发明公开了一种变截面复合桩的施工方法，适用于软弱土地基处理，其施工操作包括以下步骤：a.平整场地、双向搅拌桩机定位；b.搅拌桩机向下钻进，对土体进行喷浆并搅拌；c.提升搅拌桩机，并继续搅拌水泥土至地表或设计标高以上50cm；重复步骤b、c，完成变截面搅拌桩下部桩体；d.伸长搅拌机叶片，施作搅拌桩扩大头部分；e.完成变截面搅拌桩施工；f.在已施作的变截面搅拌桩尚未硬凝时，在其中心用振动沉管法施打具有扩大头的变截面钢筋混凝土预制桩。本发明充分结合了单一刚性桩和搅拌桩的扩径技术，兼纳变截面和劲性复合桩的双重优势，能够有效提高桩体承载力，增大桩间距，降低工程造价，具有广泛的应用前景。
Construction method for variable-section composite pile
The invention discloses a construction method for a variable-section composite pile, and is suitable for processing soft soil foundations. The construction operation of the construction method comprises the following steps of: a: flattening a place, and carrying out bidirectional stirring pile machine positioning; b: enabling the stirring pile machine to downwards drill to carry out guniting and stirring on a soil body; c: lifting the stirring pile machine, continuously stirring cement soil to the ground surface or to a position which is higher than an elevation for 50 cm or above, repeating band c to finish a lower part pile body of a variable-section stirring pile; d: elongating the vanes of a stirrer, and applying to a stirring pile expansion head part; e: finishing variable-section stirring pile construction; and f: when the constructed variable-section stirring pile is not hardened, applying a variable-section reinforced concrete precast pile with the expansion head by a vibratedpipeline sinking method on the center of the constructed variable-section stirring pile. The construction method disclosed by the invention fully combines the diameter expansion technologies of a single rigid pile and a stirring pile, so that the construction method has dual advantages of a variable section and a stiff composite pile, pile body bearing capacity can be effectively improved, a pileinterval is increased, engineering cost is lowered, and the construction method has a wide application prospect.
本发明公开了一种变截面复合桩的施工方法，适用于软弱土地基处理，其施工操作包括以下步骤：a.平整场地、双向搅拌桩机定位；b.搅拌桩机向下钻进，对土体进行喷浆并搅拌；c.提升搅拌桩机，并继续搅拌水泥土至地表或设计标高以上50cm；重复步骤b、c，完成变截面搅拌桩下部桩体；d.伸长搅拌机叶片，施作搅拌桩扩大头部分；e.完成变截面搅拌桩施工；f.在已施作的变截面搅拌桩尚未硬凝时，在其中心用振动沉管法施打具有扩大头的变截面钢筋混凝土预制桩。本发明充分结合了单一刚性桩和搅拌桩的扩径技术，兼纳变截面和劲性复合桩的双重优势，能够有效提高桩体承载力，增大桩间距，降低工程造价，具有广泛的应用前景。
Construction method for variable-section composite pile
一种变截面复合桩的施工方法
LIU SONGYU (Autor:in) / ZHANG CHAOZHE (Autor:in) / LAI FENGWEN (Autor:in) / CHENG YUEHONG (Autor:in)
03.07.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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