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Strengthening soft clay foundation for draining pine piles and construction method of strengthening soft clay foundation

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

Active Publication Date: 2016-01-06
EAST CHINA UNIV OF TECH
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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 kind of drainage pine piles to strengthen the soft clay foundation and its construction method, to solve the following problems when the traditional pine piles reinforce the soft clay foundation: (i) the problem of excessive settlement and deformation; (ii) settlement The problem of too long deformation time; (iii) the problem that the bearing capacity of the foundation is difficult to improve through the consolidation and drainage channels; (iv) the problem of the creep deformation of the soft soil clay foundation under load

Method used

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  • Strengthening soft clay foundation for draining pine piles and construction method of strengthening soft clay foundation
  • Strengthening soft clay foundation for draining pine piles and construction method of strengthening soft clay foundation
  • Strengthening soft clay foundation for draining pine piles and construction method of strengthening soft clay foundation

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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) Take the straight natural pine trunk as raw material, process it into a core material 1 with a diameter of 1500 mm to 4000 mm as the core material 5 of the drainage pine stake 5; 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 (hor...

Embodiment 2

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

[0042] (1) Take the straight natural pine trunk as raw material, process it into a diameter as the core material 1 of the drainage pine stake 5, and the length is about 1500mm~3000mm; and use the chemical solution method (or apply asphalt) to carry out 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 permeabilit...

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Abstract

The invention discloses a strengthening soft clay foundation for draining pine piles and a construction method of the strengthening soft clay foundation. A plurality of rows of draining pine piles are pressed into the soft clay foundation. Pine piles are used as core materials of the draining pine piles. Geofabric or geotextile is used for wrapping and serves as a draining structural layer. A horizontal draining sand cushion is arranged on the surface of the soft clay foundation. According to the strengthening soft clay foundation for the draining pine piles and the construction method of the strengthening soft clay foundation, the draining pine piles integrate the draining function and the strengthening function, are particularly suitable for strengthening processing of soft clay foundations of small and medium-sized hydraulic structures and are also suitable for primary strengthening processing of super-soft dredger fill and peat soil foundations, and the draining pine piles can be pulled out to be repeatedly used according to processing timeliness.

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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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 EAST CHINA UNIV OF TECH
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