A Construction Method for Strengthening Soft Clay Foundation with Drainage Pine Pile

A construction method and technology of pine piles, which are applied in soil protection, infrastructure engineering, sheet pile walls, etc., can solve the problems of large settlement deformation, difficult foundation bearing capacity, and large creep deformation of soft soil and clay foundation.

Active Publication Date: 2017-03-01
FUZHOU NO 7 CONSTR ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a drainage pine pile to strengthen the soft clay foundation and its construction method, to solve the following problems in the traditional pine pile reinforcement soft clay foundation: (i) settlement deformation is too large; (ii) settlement The deformation time is too long; (iii) the bearing capacity of the foundation is difficult to increase through the consolidation and drainage channels; (iv) the creep deformation of the soft soil clay foundation is relatively large under load

Method used

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  • A Construction Method for Strengthening Soft Clay Foundation with Drainage Pine Pile
  • A Construction Method for Strengthening Soft Clay Foundation with Drainage Pine Pile
  • A Construction Method for Strengthening Soft Clay Foundation with Drainage Pine Pile

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Embodiment 1

[0034] A construction method for reinforcing soft clay foundations of small and medium-sized hydraulic structures with drainage pine piles, comprising the following steps:

[0035] (1) Using the straight natural pine trunk as raw material, process it into the core material 1 of the drainage pine stake 5, with a length of 1500 mm to 4000 mm; and use the chemical solution method (or apply asphalt) to carry out anti-corrosion and anti-corrosion treatment;

[0036] (2) Drainage structure layer: such as figure 1 and figure 2As shown, the pine pile is used as the core material 1, and the geotextile 2, non-woven geotextile 3, and geotextile 4 are wrapped from the inside to the outside as the drainage structure layer; the thickness of the innermost geotextile 2 is 1 mm to 2 mm, and the ring Adhesives such as oxygen resin and pine piles are firmly pasted, the purpose is to increase the grip force of the interface; the middle layer has good water permeability (horizontal and vertical ...

Embodiment 2

[0041] A construction method for reinforcing super-weak dredging-filled soil foundation with drained pine piles, comprising the following steps:

[0042] (1) Using the straight natural pine trunk as raw material, process it into the core material 1 of the drainage pine stake 5, with a length of about 1500 mm to 3000 mm; and use the chemical solution method (or apply asphalt) for anti-corrosion and anti-corrosion treatment;

[0043] (2) Drainage structure layer: such as figure 1 and figure 2 As shown, the pine pile is used as the core material 1, and the geotextile 2, non-woven geotextile 3, and geotextile 4 are wrapped from the inside to the outside as the drainage structure layer; the innermost layer is the geotextile 2 with a thickness of 1 mm to 2 mm. Adhesives such as oxygen resin and pine piles are firmly pasted, the purpose is to increase the grip force of the interface; the middle layer has good water permeability (horizontal and vertical permeability coefficients are...

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Abstract

The invention discloses a drainage pine pile to reinforce soft clay foundation and a construction method thereof. A plurality of drainage pine piles are pressed into the soft clay foundation. The drainage pine pile uses pine piles as the core material and wraps geotextile or geotextile as drainage. In the structural layer, a horizontal drainage sand cushion is arranged on the surface of the soft clay foundation. In the present invention, the drainage pine pile combines the drainage function and the reinforcement function, and is especially suitable for the reinforcement treatment of soft clay foundations of small and medium-sized hydraulic structures; it is also suitable for the primary reinforcement treatment of ultra-soft dredging fill and peat soil foundations. Time-sensitive, drainage pine stakes can be pulled out and reused.

Description

technical field [0001] The invention relates to a soft clay foundation and a construction method thereof, belonging to the technical field of soft soil engineering. Background technique [0002] Soft clay foundation refers to the foundation composed of soft clay (silt, muddy soil), which is deposited in still water or very slow flowing water environment and formed by biochemical action. Soft clay has the characteristics of "high clay content, high moisture content, low permeability, low undrained strength, and high rheology". The engineering characteristics of soft clay determine that the soft clay foundation has low bearing capacity, large foundation deformation, and large uneven deformation, and the deformation stability lasts for a long time, which often leads to settlement, inclination, cracking and other diseases of structures on soft foundations, and in severe cases leads to The structure collapsed or lost its normal function. [0003] According to the engineering ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/10E02D5/26E02D27/34
Inventor 柴新军何春锋李爱飞陈士军鹿庆蕊昌毅
Owner FUZHOU NO 7 CONSTR ENG
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