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A double helix pipe, grouting pile forming equipment and construction method for strengthening soft soil

A soft soil, double-helix technology, applied in the field of grouting pile equipment and double-helix pipes, can solve the problems of high water content, weak soil strength and low bearing capacity, and achieve reduced water content, increased area, and Strong pulling effect

Active Publication Date: 2021-12-07
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a double helix pipe, grouting piling equipment and construction method for strengthening weak soil, which can solve the problems of low strength and bearing capacity and high water content of weak soil

Method used

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  • A double helix pipe, grouting pile forming equipment and construction method for strengthening soft soil
  • A double helix pipe, grouting pile forming equipment and construction method for strengthening soft soil
  • A double helix pipe, grouting pile forming equipment and construction method for strengthening soft soil

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Embodiment 1

[0047] In order to further understand the present invention, preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] Refer to attached Figure 1-4 , a double helical pipe for strengthening weak soil, comprising an outer helical pipe 1 and an inner helical pipe 2, the outer helical pipe 1 and the inner helical pipe 2 are nested and fixed together, and the inner and outer helical pipes are nested and welded together The overall length of the helical pipe structure is compatible with the thickness of the soft seabed soil layer and construction requirements, and the length of the inner helical pipe along the helical direction is slightly longer than the length of the outer helical pipe along the helical direction. The outer helical tube 1 and the top of the inner helical tube 2 are sealed and connected, the inner space of the inner helical tube 2 forms a grouting cavity, and the space between the oute...

Embodiment 2

[0059] The basic technical solution is the same as that of the preferred embodiment 1, except that the inner diameter ratio of the inner and outer helical tubes is 1:1.7. In order to ensure the integrity of the equipment, the double helical tubes and the cabin box are integrally welded through the connecting part.

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Abstract

The invention discloses a double helix pipe for reinforcing soft soil, grouting pile forming equipment and a construction method thereof. The double helical tube includes an outer helical tube and an inner helical tube, the outer helical tube and the inner helical tube are nested and fixed together, the outer helical tube and the top of the inner helical tube are sealed and connected, and the inner helical tube The inner space of the helical tube constitutes a grouting cavity, the space between the outer helical tube and the inner helical tube forms a drainage and infusion cavity, and the body of the outer helical tube is provided with a plurality of drainage and infusion holes. The grouting pile forming equipment also includes a cabin box. The construction method for reinforcing weak soil by grouting pile forming equipment includes the following steps: 1) operation preparation; 2) forward spiral downward penetration; 3) drainage consolidation; 4) chemical consolidation; 5) reverse spiral upward ; 6) Repeat the operation until all the soils to be reinforced are processed. The invention has ingenious structure, simple and flexible operation, wide application range and high reliability.

Description

technical field [0001] The invention relates to the field of weak foundation treatment, and more specifically relates to a double helical pipe for reinforcing weak soil, grouting pile forming equipment and a construction method thereof. Background technique [0002] Weak soil refers to silt, silty soil, partial flushing soil, miscellaneous filling soil and other highly compressive soil. A foundation composed of weak soil is called a weak soil foundation. Silt and muddy soil are collectively referred to as soft soil in engineering, which has special physical and mechanical properties, which leads to its unique engineering properties. Weak soil is characterized by high natural water content, large natural void ratio, low shear strength, high compressibility coefficient, and small permeability coefficient. Under the action of external load, the bearing capacity of the foundation is low, the deformation of the foundation is large, the uneven deformation is also large, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/04E02D5/34
CPCE02D15/04E02D5/34E02D5/46E02D3/12
Inventor 陈旭光卢光坤张宁万勇
Owner OCEAN UNIV OF CHINA
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