Method for treating soft coastal salty foundations by jetting industrial waste residues to bi-direction T-shaped deep mixing columns

A two-way nail-shaped, industrial waste residue technology, used in sheet pile walls, soil protection, infrastructure engineering, etc., can solve problems such as slurry leakage, uneven mixing, and shotcrete blocking, so as to reduce deployment costs and alleviate environmental pollution. problem, good effect

Inactive Publication Date: 2016-09-28
ZHEJIANG UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings such as uneven mixing, slopping, and spraying blockages of common cement mixing piles, the present invention proposes "the pile-forming operation method of two-way mixing piles" (public number CN1632233A) and "nail-shaped piles" proposed by Liu Songyu, Southeast University, etc. On the basis of the two patented technologies of "Pile Forming Process" (publication number CN1542234A), the operation method of two-way nail-shaped stirring piles is adopted, and the principle of chemical and physical improvement of coastal saline soil is combined to form the first spraying (wet spraying) The wet / dry spraying two-way nail-shaped mixing pile construction technology of first mixing compound curing agent and re-spraying (dry spraying) re-stirring waste tire rubber powder

Method used

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  • Method for treating soft coastal salty foundations by jetting industrial waste residues to bi-direction T-shaped deep mixing columns
  • Method for treating soft coastal salty foundations by jetting industrial waste residues to bi-direction T-shaped deep mixing columns
  • Method for treating soft coastal salty foundations by jetting industrial waste residues to bi-direction T-shaped deep mixing columns

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Embodiment 1: Mixing ratio design of industrial waste slag improver

[0044] According to the technical requirements for the treatment of saline soft soil under field conditions, the indoor and field test results are summarized, and the industrial waste residue (Ca 2+ base material, fly ash and activator), and the mixing ratio of composite curing agent, waste tire rubber powder and saline soil during foundation treatment.

[0045] (1) Composite curing agent ratio: a certain type of Ca can be selected 2+ Base material (such as carbide slag) as the main component, supplemented with fly ash and activator (such as MgO, etc.), according to Ca 2+ Base material: fly ash: activator = 60:30:10 ratio to make industrial waste slag composite curing agent. Experimental research shows that compared with single calcium-based materials, the composite curing agent has the advantages of adjustable setting time, high strength and good cohesion, and is very suitable for treating coastal ...

Embodiment 2

[0047] Example 2: Construction of two-way nail-shaped mixing piles by wet / dry spraying

[0048] On the basis of the pile-forming process of the existing two-way stirring pile and nail-shaped pile, the present invention improves the original "four-stirring and two-spraying" process, and adopts the first spraying (wet spraying) of the first stirring industrial waste slag composite curing agent and the second spraying (dry spraying) Spraying) re-stirring waste tire rubber powder two process links, forming a wet / dry spraying two-way nail-shaped mixing pile construction process. This process can separate the grouting (composite curing agent) and powdering (waste tire rubber powder) to prevent the soft soil from isolating the curing agent and rubber powder, resulting in the failure of coagulation and hardening reactions between the three, so as to achieve The best treatment effect.

[0049] The structure of the two-way nail-shaped mixing pile machine that the present invention adop...

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Abstract

The invention provides a method for treating coastal saline soft ground by jetting industrial waste slag into two-way nail-shaped mixing piles. The method comprises the steps of: removing sundries on the surface of the site to be treated, and leveling the site; Identify each pile position and mark it; according to the pile position identification, move the two-way nail-shaped pile mixer into place and align the specified pile position; first spray and first stir the composite curing agent slurry; second spray and second stir waste tire rubber powder; The invention uses a variety of industrial waste residues to prepare a composite curing agent, which can not only treat the coastal salt-stained soft foundation formed by tidal flat reclamation on a large scale, but also solve the problems of land occupation and environmental pollution by various wastes, and achieve good economic and social benefits. And environmental benefits, has a relatively broad engineering application prospects.

Description

(1) Technical field [0001] The invention belongs to the technical field of foundation treatment in geotechnical engineering, and in particular relates to a construction method for treating industrial waste residue of coastal saline soil by wet / dry spraying two-way nail-shaped stirring piles. (2) Background technology [0002] With the implementation of my country's marine economic development strategy, "tidal reclamation and land reclamation" has become an important means to alleviate the shortage of land resources in coastal cities. Xinwei tidal flats are saline silt formed by long-term immersion in seawater. The parent material has a high salt content, and the salt type is chloride salt. Coastal saline soil has strong hygroscopic properties in addition to its engineering properties of salt swelling, dissolution and corrosion. [0003] Traditional treatment methods mainly include soil replacement method, drainage preloading method, high pressure grouting method, powder spr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46E02D3/12
CPCE02D5/46E02D3/12
Inventor 刘萌成陶君军
Owner ZHEJIANG UNIV OF TECH
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