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Post-screw-in type external spiral concrete filled steel tube foundation pile and prestressed anchor pile construction method
The invention relates to the technical field of concrete pile construction, in particular to a construction method of a post-screwing-in type external spiral steel pipe concrete foundation pile and a pre-stressed anchor pile, and an external spiral steel pipe with spiral fins is post-screwed in pile hole concrete through a drilling machine power head to form an external spiral steel pipe concrete pile. Due to the fact that the spiral fins are arranged on the outer side of the outer spiral steel pipe twisted into the concrete pile, when the outer spiral steel pipe concrete pile is subjected to downward pressure, the grinding resistance between concrete and the outer spiral steel pipe is greatly increased due to the existence of the spiral fins, and when the age of the pile body concrete of the outer spiral steel pipe concrete pile reaches a certain time, the grinding resistance is reduced. The overall bearing capacity of the external spiral steel pipe concrete pile is higher and higher. The construction method solves the problem that in a traditional construction mode, under the conditions of low space and complex and special geology, effective and rapid construction of the pre-stressed anchor piles on the foundation piles and the stratum prone to collapse cannot be completed.
本发明涉及混凝土桩施工技术领域，尤其涉及后旋入式外螺旋钢管混凝土基础桩及预应力锚桩施工工法，本发明通过钻机动力头在桩孔砼内后旋入带螺旋翼片的外螺旋钢管从而形成外螺旋钢管混凝土桩，由于扭入砼桩的外螺旋钢管上外侧带有螺旋翼片，当外螺旋钢管混凝土桩受到向下的压力时，砼与外螺旋钢管的磨阻力会因为有螺旋翼片的存在，而增大很多，当外螺旋钢管混凝土桩的桩身砼龄期达到一定时间后，外螺旋钢管混凝土桩的整体承载能力会越来越高。这一施工工法解决了传统施工方式，在低矮空间、复杂特殊地质情况下，无法完成有效的基础桩与易坍塌地层快速完成预应力锚桩施工的问题。
Post-screw-in type external spiral concrete filled steel tube foundation pile and prestressed anchor pile construction method
The invention relates to the technical field of concrete pile construction, in particular to a construction method of a post-screwing-in type external spiral steel pipe concrete foundation pile and a pre-stressed anchor pile, and an external spiral steel pipe with spiral fins is post-screwed in pile hole concrete through a drilling machine power head to form an external spiral steel pipe concrete pile. Due to the fact that the spiral fins are arranged on the outer side of the outer spiral steel pipe twisted into the concrete pile, when the outer spiral steel pipe concrete pile is subjected to downward pressure, the grinding resistance between concrete and the outer spiral steel pipe is greatly increased due to the existence of the spiral fins, and when the age of the pile body concrete of the outer spiral steel pipe concrete pile reaches a certain time, the grinding resistance is reduced. The overall bearing capacity of the external spiral steel pipe concrete pile is higher and higher. The construction method solves the problem that in a traditional construction mode, under the conditions of low space and complex and special geology, effective and rapid construction of the pre-stressed anchor piles on the foundation piles and the stratum prone to collapse cannot be completed.
本发明涉及混凝土桩施工技术领域，尤其涉及后旋入式外螺旋钢管混凝土基础桩及预应力锚桩施工工法，本发明通过钻机动力头在桩孔砼内后旋入带螺旋翼片的外螺旋钢管从而形成外螺旋钢管混凝土桩，由于扭入砼桩的外螺旋钢管上外侧带有螺旋翼片，当外螺旋钢管混凝土桩受到向下的压力时，砼与外螺旋钢管的磨阻力会因为有螺旋翼片的存在，而增大很多，当外螺旋钢管混凝土桩的桩身砼龄期达到一定时间后，外螺旋钢管混凝土桩的整体承载能力会越来越高。这一施工工法解决了传统施工方式，在低矮空间、复杂特殊地质情况下，无法完成有效的基础桩与易坍塌地层快速完成预应力锚桩施工的问题。
Post-screw-in type external spiral concrete filled steel tube foundation pile and prestressed anchor pile construction method
后旋入式外螺旋钢管混凝土基础桩及预应力锚桩施工工法
TAO DEMING (author)
2023-05-16
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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