Screw pile lowering device applying force through ground, and pile lowering method

A technology of gravity device and screw, which is applied in the direction of sheet pile wall, building, foundation structure engineering, etc., can solve the problems of large volume of static press, large damage to pipe piles, and long time required to achieve high strength of pipe piles and all Small damage, good effect

Pending Publication Date: 2019-07-05
FUJIAN DADI CONCRETE PILE
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  • Abstract
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AI Technical Summary

Problems solved by technology

Since the 1970s, especially in the construction of Shanghai Baoshan Iron and Steel Works, a large number of steel pipe piles imported from Japan have been used, which are not only expensive, but also poor in durability.
[0003] Existing pipe piles generally use pile driving or static pressure to install piles. The pile driving method will cause great damage to the pipe pile and high noise, so it is not suitable for construction in cities; the static pressure method takes a long time and the volume of the static press Big, easy to carry

Method used

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  • Screw pile lowering device applying force through ground, and pile lowering method
  • Screw pile lowering device applying force through ground, and pile lowering method
  • Screw pile lowering device applying force through ground, and pile lowering method

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] Such as Figures 1 to 4 As shown, the screw pile device for applying force on the ground includes a pile body and a force application mechanism; the pile body includes a steel outer cylinder 1 and a concrete pile body 2 with circular horizontal sections; the length of the steel outer cylinder 1 is less than the length of the concrete pile body 2; the outer circumferential surface of the steel outer cylinder 1 is provided with a first external thread 11 along its length direction, and the inner circumferential surface is provided with an internal thread 12 along its length direction; the external surface of the concrete pile body 2 The peripheral surface is provided with a second external thread 21 that cooperates with the internal thread 12; the lower end surfaces of the steel outer cylinder 1 and the concrete pile body 2 are provided ...

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Abstract

The invention relates to a screw pile lowering device applying force through the ground, and a pile lowering method. The screw pile lowering device comprises a pile body and a force applying mechanism; the pile body comprises a steel outer tube and a concrete pile body, wherein the horizontal sections of the steel outer tube and the concrete pile body are each in a ring shape; the length of the steel outer tube is smaller than the length of the concrete pile body; the outer circumferential face of the steel outer tube is provided with a first external thread in the length direction of the steel outer tube, and the inner circumferential face of the steel outer tube is provided with an internal thread in the length direction of the steel outer tube; the outer circumferential face of the concrete pile body is provided with a second external thread matched with the internal thread; and a tubular clamp clamps the steel outer tube from the upper end of the steel outer tube to drive the steelouter tube to be rotationally screwed into the ground, and a gravity device downwards presses the steel outer tube. Hammering and static pressing are not needed, the pile lowering effect is good, ground holding is firm, the speed is high, damage to a pipe pile is small, and the linearity of the pipe pile is good.

Description

technical field [0001] The invention relates to a screw pile lowering device and a pile lowering method for applying force by using ground, and belongs to the field of building materials and construction. Background technique [0002] At the end of the 1960s, the Fengtai Bridge Factory of the Ministry of Railways began to produce pre-tensioned prestressed concrete pipe piles (referred to as PC piles), which were mainly used for the foundation construction of railway bridge projects; in the 1970s, post-tensioned prestressed concrete pipes were developed and produced. pile. Since the 1970s, especially in the construction of Shanghai Baoshan Iron and Steel Works, a large number of steel pipe piles imported from Japan have been used, which are not only expensive but also poor in durability. In order to meet the needs of port construction and development, in 1987, the Third Navigation Bureau of the Ministry of Communications introduced a full set of prestressed high-strength con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D7/22E02D5/58E02D5/60
CPCE02D5/58E02D5/60E02D7/22
Inventor 杨金辉杨晓彬董伟东周艳文冯三苟林丽华林成
Owner FUJIAN DADI CONCRETE PILE
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