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Self-divergence type herringbone stake

A glyph and pile cap technology, applied in the field of self-tensioning herringbone piles, can solve problems such as inverted cone shear failure, mixed shear surface damage, and difficulty in controlling the construction of cast-in-situ piles, and achieve fast mechanical press-in construction and self-tensioning angle bearing Lego effect

Inactive Publication Date: 2007-07-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] (2) The construction of cast-in-situ piles is difficult to control, and the calculated pile diameter is quite different from the measured pile diameter. Even if there is only a small protruding part on the pile side, the uplift bearing capacity can be significantly improved.
Inverted frustum shear failure, or mixed shear plane failure, may also occur under certain conditions

Method used

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  • Self-divergence type herringbone stake
  • Self-divergence type herringbone stake
  • Self-divergence type herringbone stake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] With reference to Fig. 1, a kind of self-tensioning type herringbone pile comprises 2 vertical piles 1,2 side by side, one end of these 2 vertical piles 1,2 is provided with pile cap 3 and pile cap 3 is vertical with these 2 vertical piles respectively. One end of the straight piles 1,2 is rotationally connected, and the other ends of the two vertical piles 1,2 are inclined surfaces and the end inclined surfaces of the two vertical piles 1,2 face each other. In this embodiment, a wire loop 4 for keeping the two vertical piles 1 and 2 close together is provided outside the two parallel vertical piles 1 and 2 .

[0066] Referring to Fig. 14, when using the present invention for construction, 1) the two piles are hoisted in place with iron wires together; 2) the pile driver presses in and cuts the iron wires; ; 4) Press into place to expose the top of the pile.

[0067] With reference to Fig. 2~12, utilize the professional finite element software Plaxis of geotechnical en...

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Abstract

The invention discloses a self-opening herringbone pile, comprising two parallel upright piles (1, 2). Pile caps (3) are set on ends of two upright piles (1, 2) and pile caps (3) are connected with ends of two upright piles (1, 2) reelingly. Another ends of two upright piles (1, 2) are slopes and slopes of ends are face-to-face. In the invention pile prefabrication ensures strength. The construction speed of mechanical indentation is rapid and the self-opening angle bears high loads. The end of pile is prefabricated into slope so that the pile opens angle automatically to form herringbone pile in mechanical indentation process. When pile driver presses one time two upright piles are formed. Compared with forming upright pile the speed is two times.

Description

technical field [0001] The invention relates to a bearing pile, in particular to a self-tensioning herringbone pile. Background technique [0002] With the frequent construction of large basements in high water level areas, relying on traditional vertical uplift piles for simple uplift design has highlighted the disadvantages of high cost, long construction period, and poor uplift effect. [0003] When a vertical pile with equal cross-section is pulled up, the pullout force is mainly borne by the pile side friction force, and the load is gradually transmitted to the deep soil through the pile body. At this time, as the displacement of the pile top increases, the tensile stress of the pile body gradually expands downward until the pile tip. When the relative displacement of the pile at the tip of the pile reaches a critical value, the frictional resistance at this place has reached the limit, and the frictional force of the entire pile body has also reached or even exceeded ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/24E02D5/52
Inventor 宰金珉汪中卫马鸣
Owner NANJING UNIV OF TECH
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