A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Foundation pile construction method based on steel casing
The invention relates to the technical field of soft soil layer pile foundation pile-forming construction, in particular to a foundation pile construction method based on a steel casing. The method comprises the following steps: constructing a lead hole until the lead hole is drilled to a fine sand layer; lowering the steel casing; hole forming construction is conducted, specifically, in the steel casing, drilling construction is conducted to the designed depth, and then a drilled hole is expanded to be formed; concrete is poured, and after the reinforcement cage is installed, the concrete is poured into the formed hole; and the steel casing is pulled out. According to the method, the hole wall of the drill hole is fixed by arranging the steel casing at the drill hole position, so that the phenomenon of hole collapse or hole collapse can be avoided as much as possible when the drill hole is drilled in an area with loose earth surface, extremely thick sediments and abundant pebble beds. In addition, before the steel casing is put down, the guide hole construction is firstly carried out, and when the guide hole is drilled to a fine sand layer, the steel casing is put down immediately, so that the hole wall can be protected as soon as possible, and the collapse amount can be reduced as much as possible. Therefore, the construction method provided by the invention can reduce the problem of hole collapse or hole collapse of the drill hole as much as possible.
本发明涉及软弱土层桩基成桩施工技术领域，特别涉及一种基于钢护筒的基桩施工方法。本发明包括：引孔施工，直至引孔钻至细砂层；下放钢护筒；成孔施工，在钢护筒内，先钻孔施工至设计深度，然后将钻孔扩至成孔；灌注混凝土，在安装钢筋笼后，向成孔内灌注混凝土；起拔钢护筒。本发明通过在钻孔位设置钢护筒的方式来使固定钻孔孔壁，进而在地表松散、沉积物巨厚，且存在丰富卵石层的地区进行钻孔时，能够尽量避免塌孔或垮孔的现象。另外，在本发明下放钢护筒前，先进行了引孔施工，当引孔钻至细砂层时，立即下放钢护筒，从而能够尽快护住孔壁，能够尽量减小塌方量。所以，本发明所提供的施工方法能够尽量减少钻孔的塌孔或垮孔问题。
Foundation pile construction method based on steel casing
The invention relates to the technical field of soft soil layer pile foundation pile-forming construction, in particular to a foundation pile construction method based on a steel casing. The method comprises the following steps: constructing a lead hole until the lead hole is drilled to a fine sand layer; lowering the steel casing; hole forming construction is conducted, specifically, in the steel casing, drilling construction is conducted to the designed depth, and then a drilled hole is expanded to be formed; concrete is poured, and after the reinforcement cage is installed, the concrete is poured into the formed hole; and the steel casing is pulled out. According to the method, the hole wall of the drill hole is fixed by arranging the steel casing at the drill hole position, so that the phenomenon of hole collapse or hole collapse can be avoided as much as possible when the drill hole is drilled in an area with loose earth surface, extremely thick sediments and abundant pebble beds. In addition, before the steel casing is put down, the guide hole construction is firstly carried out, and when the guide hole is drilled to a fine sand layer, the steel casing is put down immediately, so that the hole wall can be protected as soon as possible, and the collapse amount can be reduced as much as possible. Therefore, the construction method provided by the invention can reduce the problem of hole collapse or hole collapse of the drill hole as much as possible.
本发明涉及软弱土层桩基成桩施工技术领域，特别涉及一种基于钢护筒的基桩施工方法。本发明包括：引孔施工，直至引孔钻至细砂层；下放钢护筒；成孔施工，在钢护筒内，先钻孔施工至设计深度，然后将钻孔扩至成孔；灌注混凝土，在安装钢筋笼后，向成孔内灌注混凝土；起拔钢护筒。本发明通过在钻孔位设置钢护筒的方式来使固定钻孔孔壁，进而在地表松散、沉积物巨厚，且存在丰富卵石层的地区进行钻孔时，能够尽量避免塌孔或垮孔的现象。另外，在本发明下放钢护筒前，先进行了引孔施工，当引孔钻至细砂层时，立即下放钢护筒，从而能够尽快护住孔壁，能够尽量减小塌方量。所以，本发明所提供的施工方法能够尽量减少钻孔的塌孔或垮孔问题。
Foundation pile construction method based on steel casing
一种基于钢护筒的基桩施工方法
DONG XIAOWEI (author) / LIU YANLONG (author) / ZENG YONGLIN (author) / MA JUFENG (author) / HAN BO (author) / ZHAI YONG (author)
2022-08-30
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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