Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Diameter-expanded casing pipe concrete pile and construction method thereof
The invention discloses a diameter-expanded casing pipe concrete pile and a construction method thereof, and belongs to the technical field of soft soil foundation treatment and pile foundations. The diameter-expanded casing pipe concrete pile comprises a prefabricated conical tip, a pile body sleeve and a prefabricated pile head which are connected from bottom to top, the pile body sleeve is formed by alternately connecting a plastic casing pipe and a diameter-expanded casing pipe, the inner side of the diameter-expanded casing pipe is sleeved with a stiffening cylinder, the stiffening cylinder is composed of two rigid rings and a plurality of stiffening ribs, the rigid rings are located at the upper end and the lower end of the diameter-expanded casing pipe, the stiffening ribs are distributed in the circumferential direction of the rigid rings, and the rigid rings are fixedly connected with the stiffening ribs; the two ends of the diameter-expanded casing pipe are supported through the rigid rings, and the main body of the diameter-expanded casing pipe is supported through the stiffening ribs. Under the grouting pressure, the diameter-expanded casing pipe expands, the diameter-expanded casing pipe can be in close contact with a pile side soil body, and therefore pile side friction resistance can be rapidly generated; and a plastic drainage plate can timely discharge excess pore water pressure generated by driving the concrete pile, so that the strength of a soft soil foundation is effectively improved, and the bearing capacity of the diameter-expanded casing pipe concrete pile is further improved.
本发明公开了一种扩径套管混凝土桩及其施工方法，属于软土地基处理及桩基础技术领域，包括自下而上连接的预制锥尖、桩身套筒和预制桩头，桩身套筒由塑料套管和扩径套管交替连接组成，扩径套管的内侧套设有加劲筒，加劲筒由两个刚性环和若干个加劲肋组成，刚性环位于扩径套管的上下两端，加劲肋分布在刚性环的周向上，刚性环与加劲肋固定连接；通过刚性环支撑扩径套管的两端，通过加劲肋支撑扩径套管的主体。在注浆压力下，扩径套管发生膨胀，扩径套管能与桩侧土体紧密接触，从而能快速生成桩侧摩阻力；塑料排水板能及时排出打设混凝土桩所产生的超静孔隙水压力，有效提高软土地基强度，进一步提高扩径套管混凝土桩的承载力。
Diameter-expanded casing pipe concrete pile and construction method thereof
The invention discloses a diameter-expanded casing pipe concrete pile and a construction method thereof, and belongs to the technical field of soft soil foundation treatment and pile foundations. The diameter-expanded casing pipe concrete pile comprises a prefabricated conical tip, a pile body sleeve and a prefabricated pile head which are connected from bottom to top, the pile body sleeve is formed by alternately connecting a plastic casing pipe and a diameter-expanded casing pipe, the inner side of the diameter-expanded casing pipe is sleeved with a stiffening cylinder, the stiffening cylinder is composed of two rigid rings and a plurality of stiffening ribs, the rigid rings are located at the upper end and the lower end of the diameter-expanded casing pipe, the stiffening ribs are distributed in the circumferential direction of the rigid rings, and the rigid rings are fixedly connected with the stiffening ribs; the two ends of the diameter-expanded casing pipe are supported through the rigid rings, and the main body of the diameter-expanded casing pipe is supported through the stiffening ribs. Under the grouting pressure, the diameter-expanded casing pipe expands, the diameter-expanded casing pipe can be in close contact with a pile side soil body, and therefore pile side friction resistance can be rapidly generated; and a plastic drainage plate can timely discharge excess pore water pressure generated by driving the concrete pile, so that the strength of a soft soil foundation is effectively improved, and the bearing capacity of the diameter-expanded casing pipe concrete pile is further improved.
本发明公开了一种扩径套管混凝土桩及其施工方法，属于软土地基处理及桩基础技术领域，包括自下而上连接的预制锥尖、桩身套筒和预制桩头，桩身套筒由塑料套管和扩径套管交替连接组成，扩径套管的内侧套设有加劲筒，加劲筒由两个刚性环和若干个加劲肋组成，刚性环位于扩径套管的上下两端，加劲肋分布在刚性环的周向上，刚性环与加劲肋固定连接；通过刚性环支撑扩径套管的两端，通过加劲肋支撑扩径套管的主体。在注浆压力下，扩径套管发生膨胀，扩径套管能与桩侧土体紧密接触，从而能快速生成桩侧摩阻力；塑料排水板能及时排出打设混凝土桩所产生的超静孔隙水压力，有效提高软土地基强度，进一步提高扩径套管混凝土桩的承载力。
Diameter-expanded casing pipe concrete pile and construction method thereof
一种扩径套管混凝土桩及其施工方法
ZHANG LISHA (Autor:in) / YING HONGWEI (Autor:in) / LI BINGHE (Autor:in) / ZHANG JINHONG (Autor:in) / LIU GUAN (Autor:in)
16.11.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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