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Gradient pushing and enlarging device

A squeeze-expanding device, gradient technology, applied in drilling equipment, drilling equipment and methods, sheet pile walls, etc., to achieve the effects of light weight, improved work efficiency, and high speed

Inactive Publication Date: 2006-07-12
北京中阔地基基础技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, it solves the hole reaming problem of large-caliber multi-section extruded and expanded piles, so that hard soil layers that cannot be extruded and expanded can be reamed

Method used

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  • Gradient pushing and enlarging device
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  • Gradient pushing and enlarging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Such as figure 1 As shown: the connecting rod 13 has two built-in high-pressure oil inlet pipes 14 and two oil outlet pipes 15, which are connected with the large gradient oil cylinder 10; The arm 5 is connected, the middle extrusion arm 5 is connected with the upper extrusion arm 7 through the pivot pin 6, the upper extrusion arm 7 is connected with the upper connecting plate 12 through the pivot pin 11, and the upper connecting plate 12 is socketed with the connecting rod 13, The middle extruding and expanding arm 5 is connected with the lower extruding and expanding arm 3 through the pivot pin 4, and the lower extruding and expanding arm 3 is connected with the lower connecting disc 1 through the pivot pin 2, and the lower connecting disc 1 is socketed with the connecting rod 13.

[0010] This device works like this: when the oil is being squeezed and expanded, the oil inlet pipe 14 enters the oil, pushes the middle oil cylinder 9 and the piston rod 8 to extrude sequ...

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PUM

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Abstract

The invention relates to a gradient expansion device which is formed by expansion arm, cylinder, piston rod, axial pin, moving oil pipe, up-down connection disc, and connection rod group. Wherein, said cylinder is gradient hydraulic cylinder formed by big cylinder, middle cylinder and piston rod; the connection rod is connected to the gradient hydraulic cylinder; the big cylinder is connected to the middle cylinder; the middle cylinder is connected to the piston rod which is connected to the middle expansion arm; the middle expansion arm is connected to the upper and lower expansion arms via axial pins; the upper and lower expansion arms are individually connected to the upper and lower connection discs via axial pins; and the upper and lower connection discs are sheathed with connection rods. The invention uses direct horizontal expansion, with large expansion force, high speed, little disturb on soil, stable expanded chamber, high anti-cutting property, high efficiency, lower volume, lighter, and improved bearing ability, while it can solve the problem of using large-diameter multi-section expansion post to expand hole, to reduce the operation cost.

Description

Technical field: [0001] The invention relates to an extrusion and expansion device in the field of construction engineering, in particular to a gradient extrusion and expansion device for bored piles in construction. Background technique: [0002] Due to the high-speed development and wide application of multi-section squeezed and expanded cast-in-place piles, the size of the squeezed force, the depth of squeezed and the reliability of the squeezed force of the horizontal squeezed expansion equipment for variable cross-section piles are even more important. Due to the limitation of the hole diameter, the original extrusion equipment is transmitted to several sets of extrusion arms by the vertical force of the upper hydraulic cylinder of the extrusion equipment to perform horizontal extrusion. Such extrusion force is greatly reduced and the vertical displacement makes the quality of hole formation unguaranteed. Especially when doing the extrusion and expansion of large-diame...

Claims

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Application Information

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IPC IPC(8): E02D5/48E21B7/28
Inventor 贺德新
Owner 北京中阔地基基础技术有限公司
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