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A pretreatment method for ultra-thick waste soil foundation

A soil foundation and waste soil technology, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of foundation bearing capacity not meeting the design requirements, secondary environmental pollution, and limited reinforcement depth, etc., to reduce the foundation Effects of settlement, pollution reduction, and improvement of foundation soil strength

Active Publication Date: 2018-02-16
黄明 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a pretreatment method for ultra-thick waste soil foundations, to solve the technical problems that the traditional foundation treatment method has a small application range, will cause secondary environmental pollution, the depth of reinforcement is limited, and the bearing capacity of the foundation after reinforcement cannot meet the design requirements

Method used

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  • A pretreatment method for ultra-thick waste soil foundation

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Effect test

Embodiment 1

[0043] Embodiment 1: When the ultra-thick waste soil foundation is an ultra-thick waste land foundation with a porosity greater than 10% and does not contain domestic waste, or an ultra-thick waste land foundation of construction or industrial waste fill.

[0044] Such as figure 1 As shown, this ultra-thick waste soil foundation pretreatment method includes the following steps.

[0045] Step 1: Level and compact the surface of the ultra-thick waste soil site.

[0046] Step 2: Laying air-permeable composite geotextile 3 on the surface of the super-thick waste soil site to prevent the surface from ventilating.

[0047] Step 3: Drilling hole 1 is constructed on the ultra-thick waste soil site where air-proof composite geotextile 3 is laid, the hole diameter is greater than 89 mm, and the hole depth is designed to reach the bottom of the waste soil.

[0048] Step 4: Treat the ultra-thick waste soil foundation with vacuum negative pressure method.

[0049] The processing steps a...

Embodiment 2

[0057] Embodiment 2: When the water content in the ultra-thick waste soil foundation is higher than 25%, and the organic matter content is higher than 20%.

[0058] Such as figure 1 As shown, this ultra-thick waste soil foundation pretreatment method includes the following steps.

[0059] Step 1: Level and compact the surface of the ultra-thick waste soil site.

[0060] Step 2: Laying air-permeable composite geotextile 3 on the surface of the super-thick waste soil site to prevent the surface from ventilating.

[0061] Step 3: Drilling 1 is constructed on the super-thick waste soil site where the breathable composite geotextile 3 is laid, the hole diameter is greater than 400 mm, and the hole depth is designed to reach the bottom of the waste soil.

[0062] Step 4: Deeply degrade the domestic waste in the ultra-thick waste soil foundation.

[0063] Deep degradation further includes the following steps.

[0064] Step a: Put degradable materials into the borehole 1, and sele...

Embodiment 3

[0067] Embodiment 3: When the waste soil is located above the groundwater level, the water content is less than 5%, and the plastic and organic matter content is greater than 10%.

[0068] Such as figure 2 As shown, this ultra-thick waste soil foundation pretreatment method includes the following steps.

[0069] Step 1: Level and compact the surface of the ultra-thick waste soil site.

[0070] Step 2: Laying air-permeable composite geotextile 3 on the surface of the super-thick waste soil site to prevent the surface from ventilating.

[0071] Step 3: Drilling 1 is constructed on the super-thick waste soil site where the breathable composite geotextile 3 is laid, the hole diameter is greater than 400 mm, and the hole depth is designed to reach the bottom of the waste soil.

[0072] Step 4: Incinerate the domestic waste in the ultra-thick waste land foundation.

[0073] Step a: Install the incinerator.

[0074] Step b: Introduce oxygen and liquefied gas into the borehole 1 ...

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Abstract

A pretreatment method for a super-thick waste soil foundation comprises the following steps that 1, the surface of a super-thick waste soil field is leveled and compacted; 2, air permeability preventing composite geotechnical cloth is laid on the surface of the super-thick waste soil field; 3, the super-thick waste soil field where the air permeability preventing composite geotechnical cloth is laid is constructed for hole drilling; 4, a vacuum negative pressure method or a deep degradation method or an incineration method is determined as a treatment method of the super-thick waste soil foundation; and 5, the portions, around drilled holes, of the super-thick waste soil foundation are ram-reamed and compacted, and pile foundation engineering is constructed. According to the pretreatment method, a super-thick waste soil layer is pretreated into a regenerated soil layer, so that the foundation soil strength is improved, the foundation settlement amount is reduced, and negative friction resistance of foundation soil to latterly constructed piles is reduced; and the technical problems that a traditional foundation treatment method is narrow in application range and limited in reinforced depth, and the bearing force of a reinforced foundation cannot meet design requirements are solved.

Description

technical field [0001] The invention belongs to the field of construction, and in particular relates to a deep treatment method for ultra-thick abandoned soil foundations. Background technique [0002] The ultra-thick waste soil foundation pretreatment method is a new method of building foundation treatment. Abandoned soil refers to domestic waste fill, construction waste fill, industrial waste and other artificial spoil. Compared with the natural foundation, these abandoned soils have complex components and loose structure, which cannot meet the design requirements of building foundations. Usually, one-time treatment of super-thick waste soil often fails to meet the design requirements. For example, organic matter and plastics in domestic waste will cause hidden dangers to the later use of the foundation; building fill with complex structures and large voids will also affect the safe use of the foundation. Due to the requirements of urban development and building area, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00E02D3/12
CPCE02D3/00E02D3/12
Inventor 黄明王为民
Owner 黄明
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