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Half screw pile and its pile forming method thereof

A technology of screw piles and piles, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of soil extraction and mud pollution, and achieve the effects of construction noise pollution, no construction, and broad prospects

Inactive Publication Date: 2004-03-17
HAINAN ZHUODIAN HIGH TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-squeezing piles refer to dry and wet construction method piles, and their soil and mud pollution are very serious. At present, there are almost no better technical measures to solve them.

Method used

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  • Half screw pile and its pile forming method thereof
  • Half screw pile and its pile forming method thereof
  • Half screw pile and its pile forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The cast-in-place semi-screw pile is composed of two parts, the upper part is a linear structure, the lower part is a screw structure, the linear structure accounts for 1 / 3 of the total pile length, and the screw structure accounts for 2 / 3 of the total pile length. One-time forming construction of screw drill pipe drilling rig. The specific steps are as follows: ①. Use a special semi-screw pile drilling rig to rotate clockwise to form a hole to the design depth;

[0028] ②Use the pump to squeeze the concrete out of the bottom of the drill pipe, and rotate the drill pipe counterclockwise to lift the drill pipe to maintain the pressure difference between the drill pipe and the soil without interrupting the concrete. Rotate counterclockwise to lift and pump the concrete to form the lower screw Type pile;

[0029] ③ After the drill pipe rises close to the level of the soft soil bottom, it is changed from rotating to non-rotating straight lifting, until the upper pile is in...

Embodiment 2

[0032] The prefabricated semi-screw pile is composed of two parts, the upper part is a linear structure, the lower part is a screw structure, the linear structure accounts for 1 / 3 of the total pile length, and the screw structure accounts for 2 / 3 of the total pile length. Segment forming welding or bonding, using a high-frequency vibrator to partially liquefy the soil, so that the pile is gradually sunk during the liquefaction of the soil to form a half-screw pile.

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Abstract

The invention relates to a half screw pile and the pile forming method thereof, wherein the half screw pile comprises two parts, i.e. the upper part having a linear structure and the lower part having a screw structure. The pile by the invention can be classified into cast-in-situs type and prefabricated type the pile forming of both of which is rather simple. The advantages of the piles are, it can meet the characteristic of concentration stress on the upper portion, and increase the bearing capacity, and the concrete consumption is reduced.

Description

technical field [0001] The invention relates to the construction field, in particular to a half-screw pile and a pile-forming method thereof. Background technique [0002] Whether it is prefabricated or cast-in-place concrete end-bearing friction piles at home and abroad, the pile ends are basically placed on the soil layer with better bearing capacity. Under the state of ultimate bearing capacity, the main load of the pile is still borne by the pile side friction resistance. Although the compressive strength of concrete has a huge reserve, it is difficult to exert it, and the frictional damage of soil is often used as the limit index of the pile's bearing capacity. This type of pile represents almost all the mechanical characteristics of end-bearing friction piles at home and abroad. The birth of Japanese steel fiber prefabricated fully threaded piles has changed this force characteristic, but it has not been widely used and promoted due to its high...

Claims

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Application Information

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IPC IPC(8): E02D5/48E02D5/56
Inventor 彭桂皎虞锋赵思学彭文广
Owner HAINAN ZHUODIAN HIGH TECH DEV
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