CN105082351A - Production method of gravelly soil - Google Patents
Production method of gravelly soil Download PDFInfo
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- CN105082351A CN105082351A CN201510396961.3A CN201510396961A CN105082351A CN 105082351 A CN105082351 A CN 105082351A CN 201510396961 A CN201510396961 A CN 201510396961A CN 105082351 A CN105082351 A CN 105082351A
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- Prior art keywords
- fines
- coarse fodder
- mix
- earth material
- batching
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C1/00—Apparatus or methods for obtaining or processing clay
- B28C1/10—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants
- B28C1/14—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom
- B28C1/20—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for separating undesired admixed bodies, e.g. stones
- B28C1/203—Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition ; Plants specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom for separating undesired admixed bodies, e.g. stones by forcing the clay through screens or slots, e.g. having exchangeable screens or slots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C3/00—Apparatus or methods for mixing clay with other substances
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Fodder In General (AREA)
Abstract
The invention discloses a production method of gravelly soil; and the method can produce the gravelly soil satisfying the engineering requirements of earth and rockfill dams. Firstly, particles with particle sizes more than 150 mm in continuous-graded coarse and fine materials are eliminated; then, the thickness of a fine material layer is calculated by a specific formula according to the thickness of a coarse material layer to determine a ratio of the coarse materials to the fine materials; and finally, a blending machine is used for blending a mixture to obtain the gravelly soil with P5 content of 30-50% so as to satisfy the engineering requirements of earth and rockfill dams. The method produces the gravelly soil, and is higher in production efficiency and pass percent.
Description
Technical field
The present invention relates to a kind of production method, particularly a kind of production method of gravel earth material.
Background technology
Engineering practice shows, adopts gravelly soil to obtain in earth-rock works as the native core wall rockfill dam impermeable soil of height and uses more and more widely.In the world built and the height of dam built more than 200m height soil core wall rockfill dam, substantially all have employed the gravelly soil of wide grating as impermeable soil.China " rolling earth-rock dam design specification " (DL/T5395-2007) is given for the gravelly soil (comprising artificial fusion gravelly soil) of seepage prevention of core wall body, and its grain composition should meet following provisions: 1), maximum particle diameter be not more than 150mm or paving soil thickness 2/3; 2), P
5content and particle diameter are greater than the granule content of 5mm, are not less than 30% and no more than 50%.But it is on the low side to there is fine particle content in the gravelly soil of prototype gradation, the shortcoming that antiseepage and anti-permeability performance can not meet the demands completely; Or it is on the high side to there is fine particle content, intensity can not meet the problem of high dam stress deformation requirement.Certain engineering measure must be taked to carry out quality improvement to these gravelly soils, just can be met the impermeable soil of high earth-rock works requirement.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of producing the gravel earth material meeting high earth-rock works requirement.
The technical solution adopted for the present invention to solve the technical problems is: a kind of production method of gravel earth material, comprises the following steps:
A, with P
5content be the natural earth material of continuous grading of 50% ~ 65% as coarse fodder, and with P
5content is less than the natural earth material of continuous grading of 35% as fines;
B, coarse fodder and fines to be sieved process respectively, reject the particle that particle diameter is greater than 150mm;
C, calculate P in coarse fodder and fines respectively
5the weighted average of content and the weighted average of dry density;
D, coarse fodder and fines paved to mix and join field and formed and mix batching; When paving, lay multilayer successively from the bottom up by the mode spreading fines, coarse fodder layer and fines layer spaced after first spreading coarse fodder, and the number of plies of laying coarse fodder is equal with the number of plies of laying fines; The computing formula of the thickness of the fines layer laid is as follows:
In formula: H
slightly---mix the layer thickness of the coarse fodder layer of the adjacent downside of fines layer in batching;
H
carefully---mix the layer thickness of fines layer in batching;
P
slightly---mix the P of coarse fodder in batching
5the weighted average of content;
P
carefully---mix the P of fines in batching
5the weighted average of content;
ρ
slightly---mix the dry density weighted average of coarse fodder in batching;
ρ
carefully---mix the dry density weighted average of fines in batching;
P
5---P
5the preferred settings value of content, size is 30% ~ 50%;
E, join machinery mix and join mixing batching with mixing, obtain satisfactory gravel earth material.
Further, in stock ground, earth material presses coarse fodder district and the separate zone production from top to bottom of fines district, first unsoil, and then stage excavation obtains the coarse fodder that needs in a step and fines.
Further, in Step d, the layer thickness of coarse fodder layer is 0.5 ~ 0.7m.
Further, the layer thickness mixing batching in Step d is 5 ~ 7m.
Further, mix in step e and join machinery and will mix batching by crowd shovel or backhoe and mix and join 4 ~ 6 times.
Further, the method also comprises f step;
The P of the gravel earth material obtained in f, detection step e
5content, if it is greater than 50%, substitutes the coarse fodder in a step by this gravel earth material and repeats a ~ f step, if it is less than 30%, this gravel earth material is substituted the fines in a step and repeats a ~ f step.
The invention has the beneficial effects as follows: rejected by particle particle diameter in the coarse fodder of continuous grading and fines being greater than 150mm, and use to mix and join machinery to alternating layers tiling and there is the coarse fodder of specific thicknesses and fines mix and join, finally obtain P
5content is in the gravel earth material of 30% ~ 50%, meets high earth-rock works requirement.And, obtain the production efficiency of gravel earth material by the present invention and qualification rate all higher.In addition, the present invention is applicable to each area; For different areas, the association attributes of, fines thick according to locality, selects suitable P
5value i.e., fines fast obtained satisfactory gravel earth material thick by locality, achieves the object of local earth material of suiting measures to local conditions, effectively utilize.
Accompanying drawing explanation
Fig. 1 is flow sheet of the present invention;
Fig. 2 is the structural representation that paves mixing batching;
Fig. 3 is that embodiment produces each sampling group P of the gravel earth material obtained
5content distribution curve map;
Detailed description of the invention
Shown in composition graphs 1 and Fig. 2, a kind of production method of gravel earth material, comprises the following steps:
A, with P
5content be the natural earth material of continuous grading of 50% ~ 65% as coarse fodder, and with P
5content is less than the natural earth material of continuous grading of 35% as fines; In stock ground, earth material presses coarse fodder district and the separate zone production from top to bottom of fines district, first unsoil, and then stage excavation can obtain coarse fodder required in this step and fines; Selected fines is generally P
5the natural earth material of continuous grading that content is less than 30%;
B, coarse fodder and fines to be sieved process respectively, reject the particle that particle diameter is greater than 150mm;
C, detection calculate P in coarse fodder
5the weighted average of content and the weighted average of dry density, detect and calculate P in fines
5the weighted average of content and the weighted average of dry density; Wherein, weighted average is multiplied by corresponding flexible strategy by each numerical value, then adds up summation and obtains population value, then divided by total units; The size of average not only depends on the size of the value of statistical indicant (variate-value) of overall middle constituent parts, and depend on the number of times (frequency) that each value of statistical indicant occurs, the number of times occurred due to each value of statistical indicant plays a part to weigh the relative importance on its impact in average, is therefore called flexible strategy; About P in coarse fodder
5p in the computational process of the weighted average of the computational process of the weighted average of content, the dry density of coarse fodder, fines
5the computational process of the weighted average of the computational process of the weighted average of content and the dry density of fines is the routine techniques means that those skilled in the art grasp, and this does not repeat;
D, coarse fodder and fines paved to mix and join field and formed and mix batching; When paving, lay multilayer successively from the bottom up by the mode spreading fines, coarse fodder layer and fines layer spaced after first spreading coarse fodder, and the number of plies of laying coarse fodder is equal with the number of plies of laying fines; The computing formula of the thickness of the fines layer laid is as follows:
In formula: H
slightly---mix the layer thickness of the coarse fodder layer of the adjacent downside of fines layer in batching;
H
carefully---mix the layer thickness of fines layer in batching;
P
slightly---mix the P of coarse fodder in batching
5the weighted average of content;
P
carefully---mix the P of fines in batching
5the weighted average of content;
ρ
slightly---mix the dry density weighted average of coarse fodder in batching;
ρ
carefully---mix the dry density weighted average of fines in batching;
P
5---P
5the preferred settings value of content, size is 30% ~ 50%;
Calculated the layer thickness of every layer of fines by the layer thickness of every layer of coarse fodder, the mixed ratio of coarse fodder and fines can be determined; Within the stone height mixing batching is generally positioned at effective working depth of mixing and joining machinery; In this step, the layer thickness of coarse fodder layer is generally 0.5 ~ 0.7m, and the layer thickness mixing batching is generally 5 ~ 7m;
E, join machinery mix and join mixing batching with mixing, obtain satisfactory gravel earth material; In this step, mix and join machinery and generally will mix batching by crowd shovel or backhoe and mix and join 4 ~ 6 times;
The P of the gravel earth material obtained in f, detection step e
5content, if this P
5content is that the gravel earth material obtained in 30% ~ 50% step e meets high earth-rock works requirement, and output products; If this P
5content is greater than 50% and this gravel earth material is substituted the coarse fodder in a step and repeats a ~ f step; If this P
5content is less than 30% and this gravel earth material is substituted the fines in a step and repeats a ~ f step.
Embodiment
The earth material in certain stock ground mainly belongs to long-pending accumulation of ice and contains crushed-gravel soil, on a small quantity for slope proluvial is piled up.Exploration shows, the earth material P in this stock ground
5the inclined coarse fodder that content is greater than 50% is about 1,100,000 m
3, P
5the inclined fines that content is less than 30% is about 500,000 m
3, inclined coarse fodder and partially fines account for 35% of gross reserves.
A, with P
5content be the natural earth material of continuous grading of 50% ~ 65% as coarse fodder, and with P
5content is less than the natural earth material of continuous grading of 35% as fines; The earth material in this stock ground is pressed coarse fodder district and the separate zone production from top to bottom respectively of fines district, first overburden removing soil, then uses hydraulic hoe stage excavation;
B, the coarse fodder of exploitation and fines to be sieved process through simple and easy bar grizzl(e)y or vibrating head bar grizzl(e)y, reject the oversize block stone that particle diameter is greater than 150mm;
C, the coarse fodder after rejecting oversize block stone and fines entrucking are transported to mix and join field; In order to make to mix the object that proportion material reaches blending, carrying out layering and getting the raw materials ready before coarse fodder and fines pave, generic hierarchical THICKNESS CONTROL is 1.0m; Meanwhile, detect and calculate P in coarse fodder
5the weighted average of content and the weighted average of dry density, detect and calculate P in fines
5the weighted average of content and the weighted average of dry density; Obtain, P in coarse fodder
5the weighted average of content is 63.5%, and the weighted average of the dry density of coarse fodder is 1.92g/cm
3, P in fines
5the weighted average 21.7% of content, the weighted average 1.42g/cm of dry density in fines
3;
D, coarse fodder and fines paved to mix and join field and formed and mix batching; When paving, lay multilayer successively from the bottom up by the mode spreading fines, coarse fodder layer and fines layer spaced after first spreading coarse fodder, and the number of plies of laying coarse fodder is equal with the number of plies of laying fines; In stone process, survey crew carries out tracing control to layer thickness and stone scope; The computing formula of the thickness of the fines layer laid is as follows:
In formula: H
slightly---mix the layer thickness of the coarse fodder layer of the adjacent downside of fines layer in batching;
H
carefully---mix the layer thickness of fines layer in batching;
P
slightly---mix the P of coarse fodder in batching
5the weighted average of content;
P
carefully---mix the P of fines in batching
5the weighted average of content;
ρ
slightly---mix the dry density weighted average of coarse fodder in batching;
ρ
carefully---mix the dry density weighted average of fines in batching;
P
5---P
5the preferred settings value of content, size is 43%;
Determine coarse fodder layer layer thickness 0.5m, the fines layer thickness of calculating sees the following form:
Fines layer thickness computational chart
Mix coarse fodder and fines in batching and respectively lay 5 layers, carry out 10 layers of laying altogether; Usually, in order to mix batching surface area water Natural excrement during rainfall, each layer surface is obliquely installed, and the gradient is 1% ~ 2%;
E, join machinery backhoe mix and join 6 times mixing batching by mixing, mix join in process by earth material from the top to the bottom thin layer once mix and join;
The P of the gravel earth material obtained in f, detection step e
5content, if this P
5content is that the gravel earth material obtained in 30% ~ 50% step e meets high earth-rock works requirement, output products; If this P
5content is greater than 50% and this gravel earth material is substituted the coarse fodder in a step and repeats a ~ f step; If this P
5content is less than 30% and this gravel earth material is substituted the fines in a step and repeats a ~ f step.
The gravel earth material multidraw obtained to step e in above-described embodiment, and check the P of each sampling group
5as shown in Figure 3, result shows content, according to optimum control P in this stock ground
5content is 43% i.e. P
5when equaling 43%, mix in step e and join the gravel earth material obtained and directly can meet high earth-rock works requirement, qualification rate is the highest.
Claims (6)
1. a production method for gravel earth material, is characterized in that, comprises the following steps:
A, with P
5content be the natural earth material of continuous grading of 50% ~ 65% as coarse fodder, and with P
5content is less than the natural earth material of continuous grading of 35% as fines;
B, coarse fodder and fines to be sieved process respectively, reject the particle that particle diameter is greater than 150mm;
C, calculate P in coarse fodder and fines respectively
5the weighted average of content and the weighted average of dry density;
D, coarse fodder and fines paved to mix and join field and formed and mix batching; When paving, lay multilayer successively from the bottom up by the mode spreading fines, coarse fodder layer and fines layer spaced after first spreading coarse fodder, and the number of plies of laying coarse fodder is equal with the number of plies of laying fines; The computing formula of the thickness of the fines layer laid is as follows:
In formula: H
slightly---mix the layer thickness of the coarse fodder layer of the adjacent downside of fines layer in batching;
H
carefully---mix the layer thickness of fines layer in batching;
P
slightly---mix the P of coarse fodder in batching
5the weighted average of content;
P
carefully---mix the P of fines in batching
5the weighted average of content;
ρ
slightly---mix the dry density weighted average of coarse fodder in batching;
ρ
carefully---mix the dry density weighted average of fines in batching;
P
5---P
5the preferred settings value of content, size is 30% ~ 50%;
E, join machinery mix and join mixing batching with mixing, obtain satisfactory gravel earth material.
2. the production method of gravel earth material as claimed in claim 1, it is characterized in that: in stock ground, earth material presses coarse fodder district and the separate zone production from top to bottom of fines district, first unsoil, and then stage excavation obtains the coarse fodder that needs in a step and fines.
3. the production method of gravel earth material as claimed in claim 1, is characterized in that: in Step d, the layer thickness of coarse fodder layer is 0.5 ~ 0.7m.
4. the production method of the gravel earth material as described in claim 1 or 3, is characterized in that: the layer thickness mixing batching in Step d is 5 ~ 7m.
5. the production method of gravel earth material as claimed in claim 1, is characterized in that: mix in step e and join machinery and will mix batching by crowd shovel or backhoe and mix and join 4 ~ 6 times.
6. the production method of the gravel earth material as described in claim 1,2,3 or 5, is characterized in that: also comprise f step;
The P of the gravel earth material obtained in f, detection step e
5content, if it is greater than 50%, substitutes the coarse fodder in a step by this gravel earth material and repeats a ~ f step, if it is less than 30%, this gravel earth material is substituted the fines in a step and repeats a ~ f step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396961.3A CN105082351A (en) | 2015-07-08 | 2015-07-08 | Production method of gravelly soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510396961.3A CN105082351A (en) | 2015-07-08 | 2015-07-08 | Production method of gravelly soil |
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ID=54564110
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867226A (en) * | 2018-07-20 | 2018-11-23 | 四川锦城智信建设工程有限公司 | A kind of roadbed filling construction method of physically improved fine sand |
| CN110106833A (en) * | 2019-05-21 | 2019-08-09 | 河南省水利勘测设计研究有限公司 | Wide graded gravel material fills the construction method of material as large-scale canal for water conveyance canal base |
| CN110376090A (en) * | 2019-07-30 | 2019-10-25 | 清远市清新区谷城矿业开发投资有限公司 | A kind of determination method of Machine-made Sand |
| CN112255064A (en) * | 2020-10-26 | 2021-01-22 | 中国电建集团成都勘测设计研究院有限公司 | Method for testing relative density of coarse soil and measuring and calculating rolling parameters |
| CN112536914A (en) * | 2020-11-27 | 2021-03-23 | 中国电建集团成都勘测设计研究院有限公司 | Gravel doping method for core wall soil material of core wall dam |
| CN115301103A (en) * | 2022-08-08 | 2022-11-08 | 中国水利水电第五工程局有限公司 | Uneven gravel soil mixing method and system for high earth dam and screening method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867226A (en) * | 2018-07-20 | 2018-11-23 | 四川锦城智信建设工程有限公司 | A kind of roadbed filling construction method of physically improved fine sand |
| CN110106833A (en) * | 2019-05-21 | 2019-08-09 | 河南省水利勘测设计研究有限公司 | Wide graded gravel material fills the construction method of material as large-scale canal for water conveyance canal base |
| CN110376090A (en) * | 2019-07-30 | 2019-10-25 | 清远市清新区谷城矿业开发投资有限公司 | A kind of determination method of Machine-made Sand |
| CN110376090B (en) * | 2019-07-30 | 2022-02-18 | 清远市清新区谷城矿业开发投资有限公司 | Detection and analysis method for machine-made sand |
| CN112255064A (en) * | 2020-10-26 | 2021-01-22 | 中国电建集团成都勘测设计研究院有限公司 | Method for testing relative density of coarse soil and measuring and calculating rolling parameters |
| CN112255064B (en) * | 2020-10-26 | 2023-04-07 | 中国电建集团成都勘测设计研究院有限公司 | Method for testing relative density of coarse soil and measuring and calculating rolling parameters |
| CN112536914A (en) * | 2020-11-27 | 2021-03-23 | 中国电建集团成都勘测设计研究院有限公司 | Gravel doping method for core wall soil material of core wall dam |
| CN112536914B (en) * | 2020-11-27 | 2022-04-08 | 中国电建集团成都勘测设计研究院有限公司 | Gravel doping method for core wall soil material of core wall dam |
| CN115301103A (en) * | 2022-08-08 | 2022-11-08 | 中国水利水电第五工程局有限公司 | Uneven gravel soil mixing method and system for high earth dam and screening method |
| CN115301103B (en) * | 2022-08-08 | 2023-08-25 | 中国水利水电第五工程局有限公司 | High-earth dam uneven gravel-earth material mixing system and screening method |
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Application publication date: 20151125 |