CN101349060B - Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method - Google Patents
Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method Download PDFInfo
- Publication number
- CN101349060B CN101349060B CN2008101968137A CN200810196813A CN101349060B CN 101349060 B CN101349060 B CN 101349060B CN 2008101968137 A CN2008101968137 A CN 2008101968137A CN 200810196813 A CN200810196813 A CN 200810196813A CN 101349060 B CN101349060 B CN 101349060B
- Authority
- CN
- China
- Prior art keywords
- cement
- soil
- organic
- stirring
- organic matter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a technology for reinforcing organic soft soil by a cement and fly ash secondary stirring and powder spraying method, which comprises the following steps: (1) according to the strength of cement soil and the range value of the doping rate of the set fly ash and cement required by the design, firstly, the doping amount of the fly ash or the cement is determined, thereby calculating the doping amount of another material; (2) the first stirring: only the organic soil layer section is stirred; and (3) the secondary stirring: the stirring of the total pile section is designed. The technology has the advantages that when the doping amount of cement as a firming agent is between 13 and 20 percent, the fly ash of between 13 and 35 percent around is added; compared with the prior art of purely adopting cement and adding no fly ash as an additive, the technology improves the effect by 3.8 to 4.9 times; through practices, the technology has a clear and reasonable working principle, simple operation steps, low operating cost, high working efficiency and good reinforcing effect.
Description
Technical field
The present invention relates to the geotechnical engineering technical field, a kind of specifically concrete and coal ash secondary stirring powder spraying method technique for reinforcing organic matter soft soil.
Background technology
For the reinforcing of soft foundation soil layers such as mud, mud matter, only adopted a kind of curing compound---cement usually in the past.Facts have proved, for organic content more than 5%, especially be unconspicuous to the ground stabilization effect after the higher a kind of curing compound consolidation process of soft layer employing cement of organic content, end in failure more, make it to become the technical barrier in geotechnical engineering field.Also do not have a kind of mature methods to solve this problem at home, situation in the past can only select for use other method to handle by design alteration exactly, and often causes construction costs to increase and claim for eot to the owner.
Summary of the invention
The objective of the invention is to design a kind of organic matter soft soil at natural moisture content W=36～70% and organic content Wu=5～10% carry out that ground is handled, with concrete and coal ash as the concrete and coal ash secondary stirring powder spraying method technique for reinforcing organic matter soft soil that mixes material and natural organic matter weak soil secondary mix, raising stirring body soil cement intensity.
Concrete and coal ash secondary stirring powder spraying method technique for reinforcing organic matter soft soil of the present invention, its step is as follows:
(1) according to the mixing than value range of designing requirement soil cement intensity and given flyash, cement, at first determine the consumption that mixes of flyash or cement, can calculate the consumption that mixes of another kind of material, its design formulas is:
In the formula: fcu-cement-soil 90d cubic compressive strength value (Mpa);
-42.5 class g cements such as grade mix ratio;
Wu-organic content (%);
The qu-organic matter soft soil does not have lateral confinement intensity (kpa);
The C-coefficient, relevant with the water content of organic matter soft soil, the water content of organic soil is high more, and its secondary stirring action is obvious more, and the value of coefficient is big more; Water content o'clock gets 15～22 at W=55～70%, and W=45～55% o'clock gets 10～15, and W=36～45% o'clock gets 5～10;
(2) once stir: only to the stirring of organic soil interval
Air compressor machine send the layer end of air drilling to the organic matter soft soil layer by the ash feeding pipe road, current value with the stake machine in the process of creeping into changes the layer end of judging organic soil layer, promote the drilling tool stirring while spraying flyash, stop to spray flyash to organic soil layer top; The quantity of coal ash of dusting is measured with electronic meter, guarantees that every meter the coal ash amount of dusting reaches designing requirement;
(3) secondary stirs: design the stirring of full pile cutoff
Air compressor machine send air drilling to a design stake end absolute altitude is arranged by the ash feeding pipe road, and jet cement also promotes drilling tool and stirs, on one side jet cement promote drilling tool on one side and stir, stop jet cement to design stake top; The quantity of spraying cement is measured with electronic meter, guarantees that every meter spraying cement amount reaches designing requirement, stirs again.
My company determines that mixing than scope of cement and flyash is achieved in that the intensity of cement-soil is relevant with the volume of cement and coal ash, also relevant with the character of organic matter soft soil itself, promptly relevant with natural moisture content, organic content and characteristic load bearing capacity, according to the requirement of strength of design cement-soil, by empirical formula
In the formula: fcu-cement-soil 90d cubic compressive strength value (Mpa);
-flyash mix ratio;
Wu-organic content (%);
The qu-organic matter soft soil does not have lateral confinement intensity (kpa);
The C-coefficient, relevant with the water content of organic matter soft soil, the water content of organic soil is high more, and its secondary stirring action is obvious more, and the value of coefficient is big more; Water content o'clock gets 15～22 at W=55～70%, and W=45～55% o'clock gets 10～15, and W=36～45% o'clock gets 5～10
Draft mixing of flyash and compare scope than mixing of scope, cement, repeatedly test repeatedly, draw a series of data, the data that meet soil cement intensity are put in order, draw cement to mix than scope be 13～20% of natural soil weight, flyash to mix than scope be 13～35% of natural soil weight.The severe three's of the area that the weight of natural soil is holed for the stake machine, the degree of depth and soil product.
The advantage of concrete and coal ash secondary stirring powder spraying method technique for reinforcing organic matter soft soil of the present invention is: when the curing compound cement mixed ratio is 13～20%, the flyash of adding about 13～35%, do not add the flyash Admixture than simple employing cement and improve 3.8～4.9 times, through facts have proved, present technique operating principle clear and rational, operating procedure are simple, low operation cost, high efficiency, consolidation effect are good.
The specific embodiment
Embodiment one
A kind of concrete and coal ash secondary stirring powder spraying method technique for reinforcing organic matter soft soil, its step is as follows:
(1) mud of natural moisture content W=67%, C gets 20, organic content Wu=7.8%, native formula test records mud is not had lateral confinement intensity qu=30kpa; By mixing than being 13% of 42.5 Portland cements, flyash mixes than being 35%, calculates by following formula:
(2) once stir: only to the stirring of organic soil interval
Air compressor machine send the layer end of air drilling to the organic matter soft soil layer by the ash feeding pipe road, current value with the stake machine in the process of creeping into changes the layer end of judging organic soil layer, promote the drilling tool stirring while spraying flyash, stop to spray flyash to organic soil layer top; The quantity of coal ash of dusting is measured with electronic meter, guarantees that every meter the coal ash amount of dusting reaches designing requirement;
(3) secondary stirs: design the stirring of full pile cutoff
Air compressor machine send air drilling to a design stake end absolute altitude is arranged by the ash feeding pipe road, and jet cement also promotes drilling tool and stirs, on one side jet cement promote drilling tool on one side and stir, stop jet cement to design stake top; The quantity of spraying cement is measured with electronic meter, guarantees that every meter spraying cement amount reaches designing requirement, stirs again.
Embodiment two
A kind of concrete and coal ash secondary stirring powder spraying method technique for reinforcing organic matter soft soil, its step is as follows:
(1) mud of natural moisture content W=67%, C gets 20, organic content Wu=7.8%, native formula test records mud is not had lateral confinement intensity qu=30kpa; By mixing than being 20% of 42.5 Portland cements, flyash mixes than being 20%, calculates by following formula:
(2) once stir: only to the stirring of organic soil interval
Air compressor machine send the layer end of air drilling to the organic matter soft soil layer by the ash feeding pipe road, current value with the stake machine in the process of creeping into changes the layer end of judging organic soil layer, promote the drilling tool stirring while spraying flyash, stop to spray flyash to organic soil layer top; The quantity of coal ash of dusting is measured with electronic meter, guarantees that every meter the coal ash amount of dusting reaches designing requirement;
(3) secondary stirs: design the stirring of full pile cutoff
Air compressor machine send air drilling to a design stake end absolute altitude is arranged by the ash feeding pipe road, and jet cement also promotes drilling tool and stirs, on one side jet cement promote drilling tool on one side and stir, stop jet cement to design stake top; The quantity of spraying cement is measured with electronic meter, guarantees that every meter spraying cement amount reaches designing requirement, stirs again.
Embodiment three
A kind of concrete and coal ash secondary stirring powder spraying method technique for reinforcing organic matter soft soil, its step is as follows:
(1) mud of natural moisture content W=67%, C gets 20, organic content Wu=7.8%, native formula test records mud is not had lateral confinement intensity qu=30kpa; By mixing than being 17% of 42.5 Portland cements, flyash mixes than being 27%, calculates by following formula:
(2) once stir: only to the stirring of organic soil interval
Air compressor machine send the layer end of air drilling to the organic matter soft soil layer by the ash feeding pipe road, current value with the stake machine in the process of creeping into changes the layer end of judging organic soil layer, promote the drilling tool stirring while spraying flyash, stop to spray flyash to organic soil layer top; The quantity of coal ash of dusting is measured with electronic meter, guarantees that every meter the coal ash amount of dusting reaches designing requirement;
(3) secondary stirs: design the stirring of full pile cutoff
Air compressor machine send air drilling to a design stake end absolute altitude is arranged by the ash feeding pipe road, and jet cement also promotes drilling tool and stirs, on one side jet cement promote drilling tool on one side and stir, stop jet cement to design stake top; The quantity of spraying cement is measured with electronic meter, guarantees that every meter spraying cement amount reaches designing requirement, stirs again.
Claims (1)
1. concrete and coal ash secondary stirring powder spraying method reinforcing organic matter soft soil method, this method is characterized in that at the organic matter soft soil of natural moisture content W=36～70% and organic content Wu=5～10%: its step is as follows:
(1) according to the mixing than value range of designing requirement soil cement intensity and given flyash, cement, at first determine the consumption that mixes of flyash or cement, can calculate the consumption that mixes of another kind of material, its design formulas is:
In the formula: fcu-cement-soil 90d cubic compressive strength value (Mpa);
Wu-organic content (%);
The qu-organic matter soft soil does not have lateral confinement intensity (kpa);
The C-coefficient, relevant with the water content of organic matter soft soil, the water content of organic soil is high more, and its secondary stirring action is obvious more, and the value of coefficient is big more; Water content o'clock gets 15～22 at W=55～70%, and W=45～55% o'clock gets 10～15, and W=36～45% o'clock gets 5～10;
(2) once stir: only to the stirring of organic soil interval,
Air compressor machine send the layer end of air drilling to the organic matter soft soil layer by the ash feeding pipe road, current value with the stake machine in the process of creeping into changes the layer end of judging organic soil layer, promote the drilling tool stirring while spraying flyash, stop to spray flyash to organic soil layer top; The quantity of coal ash of dusting is measured with electronic meter, guarantees that every meter the coal ash amount of dusting reaches designing requirement;
(3) secondary stirs: design the stirring of full pile cutoff,
Air compressor machine send air drilling to a design stake end absolute altitude is arranged by the ash feeding pipe road, and jet cement also promotes drilling tool and stirs, on one side jet cement promote drilling tool on one side and stir, stop jet cement to design stake top; The quantity of spraying cement is measured with electronic meter, guarantees that every meter spraying cement amount reaches designing requirement, stirs again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101968137A CN101349060B (en) | 2008-08-29 | 2008-08-29 | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101968137A CN101349060B (en) | 2008-08-29 | 2008-08-29 | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101349060A CN101349060A (en) | 2009-01-21 |
| CN101349060B true CN101349060B (en) | 2010-06-09 |
Family
ID=40268011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101968137A Active CN101349060B (en) | 2008-08-29 | 2008-08-29 | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101349060B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153303A (en) * | 2010-12-13 | 2011-08-17 | 中铁第四勘察设计院集团有限公司 | Chemical improving method using soft rock weathered material as high-speed railway subgrade filler |
| CN102518127A (en) * | 2012-01-13 | 2012-06-27 | 海南大学 | Method for forming cement-soil pile in organic matter disseminated sand |
| CN105254223A (en) * | 2015-09-01 | 2016-01-20 | 河北大地建设科技有限公司 | Compaction soil-cement-fly ash pile |
| CN106906819A (en) * | 2017-02-24 | 2017-06-30 | 浙江省交通规划设计研究院 | A kind of solidification processing method of muck soil |
| CN109826176B (en) * | 2019-03-05 | 2021-05-07 | 车明凤 | Pipe trench engineering construction process for coastal special silt geology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220590A (en) * | 2008-01-04 | 2008-07-16 | 东南大学 | Sullage solidifying method |
| CN101250873A (en) * | 2008-04-10 | 2008-08-27 | 徐玉杰 | High-pressure injection slip-casting construction method for flabbiness foundation |
| CN101250872A (en) * | 2008-03-24 | 2008-08-27 | 徐玉杰 | Flabbiness ground strengthened cement mortar stirring pile and pile-formation method thereof |
-
2008
- 2008-08-29 CN CN2008101968137A patent/CN101349060B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220590A (en) * | 2008-01-04 | 2008-07-16 | 东南大学 | Sullage solidifying method |
| CN101250872A (en) * | 2008-03-24 | 2008-08-27 | 徐玉杰 | Flabbiness ground strengthened cement mortar stirring pile and pile-formation method thereof |
| CN101250873A (en) * | 2008-04-10 | 2008-08-27 | 徐玉杰 | High-pressure injection slip-casting construction method for flabbiness foundation |
Non-Patent Citations (5)
| Title |
|---|
| JP特开2006-150341A 2006.06.15 * |
| 杨崇波等.有机质含量对水泥土强度的影响及对策.山西建筑31 2.2005,31(2),97-98. * |
| 杨滨.水泥土强度规律研究.中国优秀硕士学位论文全文数据库 2007年第1期.2007,(2007年第1期),全文. * |
| 王辉等.黄家湖污水处理厂深层搅拌法地基处理实录.资源环境与工程20 4.2006,20(4),387-391. * |
| 郭虎平.软土基础加固水泥搅拌桩施工工艺.科技情报开发与经济11 4.2001,11(4),114-115. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101349060A (en) | 2009-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Achtemichuk et al. | The utilization of recycled concrete aggregate to produce controlled low-strength materials without using Portland cement | |
| CN102757206B (en) | Mine fracture grouting material and usage method thereof | |
| CN101349060B (en) | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method | |
| CN107401159A (en) | A kind of premixing fluidised form solidified earth | |
| CN105906226B (en) | A kind of preparation method of cement mixing pile compound additive, curing materials and compound additive | |
| WO2022160712A1 (en) | Method for consolidating soft soil foundation by using industrial solid waste as main raw material | |
| CN113307591B (en) | Multi-source solid waste composite high-flow-state backfill material and preparation method and application thereof | |
| CN107459301A (en) | A kind of premixing fluidised form solidified earth | |
| CN103214217A (en) | Composite superfine cement grout slurry and preparation method thereof | |
| CN102492404A (en) | Anti-blowby cement slurry | |
| CN106368214B (en) | A kind of casing formula cement mixing method at pile operation method | |
| Lachemi et al. | Controlled low strength materials incorporating cement kiln dust from various sources | |
| JP6693770B2 (en) | Ground improvement material and ground improvement method using the same | |
| CN101581093A (en) | Composite high performance soil cement mortar pile construction method | |
| CN107840618A (en) | High-performance mending mortar is frozen in a kind of highway concrete bridge reparation salt resistance | |
| Kazemain et al. | Review of soft soils stabilization by grouting and | |
| CN103723940A (en) | Mucky soil composite curing agent and application | |
| CN110330307A (en) | A kind of roadbed reinforcement rapid hardening injecting paste material and preparation method thereof | |
| CN101255693A (en) | Ground strengthening cement mortar rotary-spraying pile and construction method | |
| CN103964809B (en) | Hydraulic reclamation marine mud curing agent and curing thereof | |
| CN106939165A (en) | A kind of soil body curing agent and its preparation method and its gunnite method | |
| KR101583257B1 (en) | Lightweight soil for preventing sinkhole | |
| CN109734352A (en) | Extra retarded set self-hardening slurry enhances additive and preparation method | |
| CN104045308B (en) | A kind of concrete, concrete tubular pile and preparation method thereof | |
| JPH10168452A (en) | Water glass based suspension grout and method for grouting and solidifying ground by using it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN SURVEYING-GEOTECHNICAL RESEARCH INSTITUTE OF Free format text: FORMER OWNER: CHINA METALLURGY GROUP WUKAN GROUND FOUNDATIONAL ENGINEERING COMPANY Effective date: 20110920 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110920 Address after: 430080 Wuhan, Heilongjiang Province, Qingshan District, metallurgical Road, No. 177, No. Patentee after: Wuhan Surveying-Geotechnical Research Institute of China Metallurgical Science and Industry Group Co Address before: 430080 Wuhan, Heilongjiang Province, Qingshan District, metallurgical Road, No. 177, No. Patentee before: China Metallurgy Group Wukan Ground Foundational Engineering Company |