Shield muck recycling modifying process method

A process method and resource utilization technology, which are applied in the field of shield tunneling slag resource utilization, can solve the problem that shield tunneling slag cannot be utilized in large quantities.

Active Publication Date: 2021-07-30
兰方环保工程(南京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a process method for resource improvement of shield tunneling dregs, which solves the technical problem that shield tunneling dregs cannot be utilized in large quantities in the prior art

Method used

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  • Shield muck recycling modifying process method
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  • Shield muck recycling modifying process method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The shield muck of a subway project, after random sampling of the muck in the collection pit, the average value of its physical and chemical indicators is as follows figure 1 Shown:

[0033] (1) The resource improvement process of the present invention is used for pretreatment and resource improvement to form brick-making raw material soil.

[0034]Since the moisture content of the shield dregs is less than 30%, dehydration and drying treatment is not required. The R215-9 excavator is used to dig out the dregs in the collection pit, and the materials are directly fed into the 210-type soil improvement integrated machine for crushing and mixing pretreatment. Obtain uniform fine-grained dry soil; feed the fine-grain dried soil into the 210-type soil improvement all-in-one machine for resource improvement, and put in powder soil curing agent as the modifier, and the dosage of the modifier is fine-grain dry 5% of the soil mass. The components and contents of the powder so...

Embodiment 2

[0041] The shield muck of a subway project, after random sampling of the muck in the collection pit, the average value of its physical and chemical indicators is as follows figure 2 Shown:

[0042] (1) The resource improvement process of the present invention is used to perform dehydration and drying treatment, crushing and mixing pretreatment and resource improvement to form brick-making raw material soil.

[0043] Since the moisture content of the shield slag is greater than 30% and less than 40%, the in-situ dehydration treatment is directly carried out in the collection pit, and block quicklime is used as the dehydrating agent, and the dosage of block quicklime is 4% of the mass of the slag; the quicklime Add it into the soil collection pit, use the R215-9 excavator to carry out the in-situ mixing operation, mix the quicklime and the shield dregs evenly, and then use the rainproof cloth to cover the muck in the soil collection pit, the purpose of the stew The quicklime c...

Embodiment 3

[0055] The shield muck of a subway project, after random sampling of the muck in the collection pit, the average value of its physical and chemical indicators is as follows figure 2 Shown:

[0056] (1) The resource improvement process of the present invention is used to perform dehydration and drying treatment, crushing and mixing pretreatment and resource improvement to form brick-making raw material soil.

[0057] Since the moisture content of the shield slag is greater than 40% and less than 50%, the in-situ dehydration treatment is carried out directly in the soil collection pit, and block quicklime is used as the dehydrating agent, and the dosing ratio of block quicklime is 6% of the mass of the shield slag; Put the quicklime into the collection pit, use the R215-9 excavator to carry out the in-situ mixing operation, mix the quicklime and the shield dregs evenly, and then use the rainproof cloth to cover the muck in the collection pit and stew the material. The purpose ...

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Abstract

The invention discloses a shield muck recycling modifying process method. The shield muck recycling modifying process method comprises the following steps that (1) firstly, the moisture content of shield muck is tested, when the moisture content is less than or equal to 30%, the muck is dry muck, and a next operation is carried out on the dry muck, and when the moisture content is larger than 30%, dehydration treatment is conducted on the shield muck by using a dehydrating agent to form the dry muck, and then next operation, wherein when the recycled product is brick making raw material soil or roadbed material soil, quicklime is adopted as the dehydrating agent; and when the recycled product is garden planting soil, the dehydrating agent is a macromolecular water absorbent; (2) crushing and mixing pretreatment is conducted on the dry muck to homogenize particles of the dry muck or the dry muck added with the dehydrating agent to form fine-particle dry muck; and (3) modifying treatment is conducted on the pretreated fine-particle dry muck, specifically, different types of modifiers are added into the shield muck, crushing and uniform mixing are conducted on the shield muck simultaneously, and the recycled products such as brick making raw material soil, roadbed materials, garden planting soil and the like are obtained finally.

Description

technical field [0001] The invention relates to a process method for improving shield machine dregs resource utilization, which belongs to the technical field of shield machine dregs resource utilization. Background technique [0002] In the prior art, there are two main treatment methods for shield tunneling dregs: one is the treatment process with solid-liquid separation equipment as the core, which is usually suitable for shield tunneling dregs with high moisture content produced by the mud-water shield method, or shield tunneling muck The content of sand and gravel in the construction slag is relatively high, which has a high recovery value. Its main process includes dilution slurry making, mud and sand separation, mud concentration, filter press dehydration and other processes, and the shield slag is separated into sand and gravel aggregates. , water and desiccated soil, the main purpose is to achieve source reduction and loading and transportation; the other is to add ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00A01G24/28A01G24/10A01G24/00
CPCB09B3/00A01G24/28A01G24/10A01G24/00Y02W30/91
Inventor 闫刚曹子骞霍耀东
Owner 兰方环保工程(南京)有限公司
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