CN114319311A - Metallurgical plant and mine railway roadbed filling material and construction method - Google Patents
Metallurgical plant and mine railway roadbed filling material and construction method Download PDFInfo
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- CN114319311A CN114319311A CN202210070748.3A CN202210070748A CN114319311A CN 114319311 A CN114319311 A CN 114319311A CN 202210070748 A CN202210070748 A CN 202210070748A CN 114319311 A CN114319311 A CN 114319311A
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Abstract
The invention discloses a metallurgical plant and mine railway roadbed filler and a construction method thereof, wherein the metallurgical plant and mine railway roadbed filler is prepared by fully mixing and improving a ballast soil mixed material and blast furnace granulated slag according to a certain proportion; according to the improved technical scheme, a large amount of ballast soil mixed materials produced in the project construction of maintenance, modification and the like of metallurgical plant and mine railways are subjected to physicochemical and geomechanical performance analysis tests, the ballast soil mixed materials meeting the requirements are selected as main raw materials for screening and processing, and blast furnace water slag inorganic materials in different proportions are doped according to the use requirements for physicochemical and mechanical performance improvement application, so that the reinforced concrete achieves the target effects of excellent strength indexes of railway roadbed filler standards, good water stability and weather resistance and meeting the environmental protection requirements.
Description
Technical Field
The invention relates to the technical field of railway transportation of metallurgical enterprises, in particular to a metallurgical plant and mine railway roadbed filler and a construction method thereof.
Background
Along with the development of the heavy-duty direction of the railway transportation of metallurgical factories and mines, the heavy-duty matching of the railway track and the roadbed structure of the metallurgical railway is required, and the requirements on the dynamic load bearing capacity and the stability of the railway roadbed are continuously improved. Therefore, in the railway maintenance and new construction projects, the railway roadbed needs to be reinforced, wherein the most common technical scheme is to adopt an excavation filling (returning) processing roadbed scheme, the scheme calculates the bearing capacity requirement of a roadbed surface according to the upper track load, reasonably selects roadbed filling by combining the geological and hydrological conditions in the roadbed range, and calculates and determines the filling reinforcing depth and width range of the roadbed body. The core of the scheme is that the roadbed filling with excellent economic and environmental protection performance is selected according to local conditions.
In the existing metallurgical plant and mine railway roadbed filling and reinforcing treatment scheme, commonly adopted roadbed fillers comprise: steel tailings, crushed stone soil, improved soil and sand and stone materials. The steel tailing filler is adopted, and is forbidden to be directly used due to the problems of excessive alkalinity of environment-friendly detection of roadbed drainage, potential expansion instability, industrial solid waste treatment regulation and the like; the performance index of the crushed stone soil filler is difficult to control in construction, and the local material range is limited; the improved soil-like roadbed filling has limited structural layer strength and poor water stability; local sand and stone materials are selected for replacement and filling, so that the shortage of material sources is difficult to meet the timely requirement of the project, and the cost is high.
Therefore, aiming at the railway practice of metallurgical industrial and mining enterprises, the roadbed filling material which meets the requirements of environmental protection and technical performance and is economical and reasonable is sought so as to meet the great demand of railway engineering construction.
Disclosure of Invention
The invention aims to provide a metallurgical plant and mine railway roadbed filling material and a construction method thereof, which are simple and practical in overall technical implementation and good in overall roadbed treatment effect while meeting the environmental protection use regulations, effectively realize development and utilization of solid waste materials, greatly reduce railway maintenance and modification costs, and solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a metallurgical plant and mine railway roadbed filler is prepared by fully mixing and improving a ballast-soil mixed material and blast furnace granulated slag according to a certain proportion.
Furthermore, the ballast soil mixed material is collected by utilizing the hardened roadbed or the stock road shoulder block cleared in the maintenance or reconstruction engineering construction of the metallurgical plant and mine railwayA large-batch ballast soil mixed material in a barrier mainly comprises the following components: rubble, coal coke powder mineral substance, clay granule adopt 70 mm's in aperture steel wire mesh screen to screen rough machining, clear away weeds rubbish, reject the clay piece, this kind of tiny fragments of stone, coal, etc. soil mixture reaches through the screening test: the content of the particulate matters with the particle diameter phi of more than or equal to 2mm is more than or equal to 70 percent, the tested Ph value is less than 9, and the maximum dry density is 2.1g/cm3。
Furthermore, the blast furnace granulated slag adopts cold-state granular granulated slag produced by an iron-making blast furnace, and the main physicochemical indexes are as follows: the particle size is 0.5mm-2mm, and the bulk volume weight is as follows: 0.71-0.83g/cm3The silicate is present in the form of dicalcium silicate, tricalcium silicate, magnesium silicate, aluminium silicate, manganese silicate and small amounts of iron silicate, and is weakly alkaline.
Furthermore, the mass ratio range of the blast furnace granulated slag and the ballast soil mixture is 1:11-1: 8; wherein, the filler for the roadbed bed surface layer adopts blast furnace granulated slag: the mixture of the ballast soil is 1:9-1:8, and the backfilling and rolling compactness is more than or equal to 95 percent; the bottom filler for the subgrade bed adopts blast furnace granulated slag: the mixture of the ballast soil is 1:11-1:10, and the backfilling and rolling compactness is more than or equal to 92%.
Furthermore, the water content of the ballast soil mixture used on site is controlled to be 3-6%, the water content of the blast furnace granulated slag is less than or equal to 5%, the mixture is uniformly mixed on site or in a fixed site and is used along with stirring, the storage period is not more than 15 days, and the construction in rainy days needs to be protected from rain and water in time.
The invention provides another technical scheme: a construction method of metallurgical plant and mine railway roadbed filling comprises the following steps:
s1: selecting and processing roadbed filling: (1) collecting a large batch of ballast soil mixed materials of hardened road bed or stock road shoulder obstacles removed in the maintenance or modification engineering construction of metallurgical plant and mine railways; (2) cold granular water slag generated by an iron-making blast furnace is used as blast furnace water slag;
s2: the improved application of the roadbed filling material comprises the following steps: the ballast soil mixed material and the blast furnace water granulated slag in the S1 are fully mixed and improved according to a certain proportion, so that the physicochemical property of the mixture is improved, the coarse and fine aggregate particles are reasonably and compactly bonded, and the pH value is less than or equal to 9, which meets the environmental protection requirement;
s3: selecting an application scheme of the roadbed filling material: through combining the application and analysis of the geotechnical test, the mass mixing ratio range of the blast furnace granulated slag improved ballast soil mixed material is as follows: blast furnace granulated slag: the mixture of the ballast soil is 1:11-1: 8.
Further, the filler for the foundation bed of the ordinary railway in S3, wherein the foundation bed surface layer adopts a ratio of 1:9-1:8, backfilling the blast furnace granulated slag improved ballast soil mixture to a thickness of 0.5 m; the subgrade bed bottom layer adopts a structure of 1:11-1: the backfill thickness of the 10 blast furnace granulated slag modified ballast soil mixture is 0.7m, and the bearing capacity of a roadbed surface is more than or equal to 0.16 MPa.
Further, the filler for the roadbed bed of the heavy rail railway in S3, wherein the roadbed bed surface layer adopts the weight ratio of 1:9-1:8, backfilling the blast furnace granulated slag improved ballast soil mixture to a thickness of 0.7 m; the subgrade bed bottom layer adopts a structure of 1:11-1: the backfill thickness of the 10 blast furnace granulated slag modified ballast soil mixture is 0.8m, and the bearing capacity of a roadbed surface is more than or equal to 0.22 MPa.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a metallurgical plant and mine railway roadbed filler and a construction method thereof, which have wide raw material sources and can be obtained locally, wherein a ballast soil mixture is collected and used for removing roadbed products such as maintenance, modification and the like of metallurgical plant and mine railways, and is subjected to primary processing; the granulated slag is produced by blast furnace, and has simple preparation process, no dust pollution, fast mechanical mixing, back filling and rolling, and no influence of weather environment.
2. The metallurgical plant and mine railway roadbed filler and the construction method thereof provided by the invention are used for roadbed processing structure layer sealing, good stability and high roadbed strength (the bearing capacity of the common roadbed is more than or equal to 0.16MPa, and the bearing capacity of the heavy rail railway roadbed is more than or equal to 0.22MPa), meet the environmental protection requirement, and are particularly suitable for treatment and reinforcement of roadbed diseases soaked by rainwater frequently.
3. The metallurgical plant and mine railway roadbed filler and the construction method provided by the invention not only solve the problem of roadbed filler source, but also effectively realize reasonable utilization of ballast soil solid waste, and have good economic and social comprehensive benefits. According to the measurement and calculation: compared with the traditional roadbed filling scheme, the scheme of improving the roadbed filling by the blast furnace granulated slag can save the comprehensive construction cost of the project by about 60 percent, is widely popularized and applied, can generate obvious direct economic benefits, and greatly reduces the railway maintenance and modification cost.
Drawings
FIG. 1 is a cross-sectional view of a subgrade treated with an improved filler in accordance with an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a metallurgical plant and mine railway roadbed filler and a construction method thereof, wherein the metallurgical plant and mine railway roadbed filler is prepared by fully mixing and improving a ballast soil mixed material and blast furnace granulated slag according to a certain proportion; the ballast soil mixed material is collected and utilized in large batches of ballast soil mixed materials such as hardened roadbed or stock road shoulder barriers cleared in metallurgical plant and mine railway maintenance or modification engineering construction, and mainly comprises the following components: rubble, coal coke powder mineral substance, clay granule etc. adopt aperture (70mm x 70mm) steel wire mesh screen to screen rough machining, clear away weeds rubbish, reject the clay piece, this kind of tiny fragments of stone, coal, etc. soil mixture can reach through the screening test: the content of the particulate matters with the particle diameter phi of more than or equal to 2mm is more than or equal to 70 percent, the tested Ph value is less than 9, and the maximum dry density is 2.1g/cm3. 2. The cold-state granular water slag produced by an iron-making blast furnace has the main physicochemical indexes: the particle size is 0.5mm-2mm, and the bulk volume weight is as follows: 0.71-0.83g/cm3The silicate is present in the form of dicalcium silicate, tricalcium silicate, magnesium silicate, aluminium silicate, manganese silicate and small amounts of iron silicate, and is weakly alkaline. The use requirements are as follows: the storage period is not more than 1 year, and no hardening, loosening and scattering are caused.
The invention aims at the improvement application technology of roadbed filling: the ballast soil mixed material and the blast furnace granulated slag are fully mixed and improved according to a certain proportion, so that the physicochemical property of the ballast soil mixed material and the blast furnace granulated slag are improved, the grain composition of coarse and fine aggregates is reasonably and compactly bonded, the pH value (the pH value is less than or equal to 9) meets the environmental protection requirement, and the roadbed filler has good consolidation sealing property, strong hydrophobicity, good water temperature stability and strength index and reaches the standard of excellent railway roadbed fillers.
The roadbed filling application scheme of the invention is as follows: through combining the application analysis of geotechnical test, the application (quality) mixing proportion range of the blast furnace granulated slag improved ballast soil filler is as follows: blast furnace granulated slag: the mixture of the ballast soil is 1:11-1: 8. Wherein, the filling material used for the roadbed bedding (within the range of-0.5 m below the roadbed surface) can adopt 1:9-1:8, the backfilling rolling compaction degree is more than or equal to 95 percent, the filling material used for the roadbed bedding (within the range of-0.5-1.2 m below the roadbed surface) can adopt 1:11-1:10, and the backfilling rolling compaction degree is more than or equal to 92 percent. The water content of the ballast soil mixture used on site is controlled to be 3-6%, the water content of the blast furnace granulated slag is less than or equal to 5%, the mixture is uniformly mixed on site (or fixed site), the mixture is used along with stirring, the storage period is not more than 15 days, and the construction in rainy days needs to be protected from rain and water in time.
According to the roadbed filler improvement application technical scheme, a large amount of ballast soil mixed materials (without steel tailings) produced in the project construction of maintenance, reconstruction and the like of metallurgical plants and mines and railways are subjected to physicochemical and geomechanical property analysis tests, the ballast soil mixed materials meeting requirements are selected as main raw materials to be screened and processed, and blast furnace slag inorganic materials with different proportions are added according to the use requirements to perform physicochemical and mechanical property improvement application, so that the roadbed filler reaches the strength index with excellent roadbed filler standard, good water stability and weather resistance, and the target effect of environmental protection requirements is met.
In conclusion, the technical scheme of the invention is used for reinforcing and treating the roadbed of the ordinary and heavy-duty railway of the metallurgical plant and the mine, and aims to improve the strength and stability of the surface layer and the base layer of the railway roadbed under the continuous and repeated action of the dynamic load of the metallurgical heavy-duty train. Wherein, all raw materials used by the technical scheme are derived from specific solid waste products in the metallurgy factories and mines: collecting and utilizing a construction product for maintaining and transforming a metallurgical plant and a mine railway; the grain slag is solid waste products produced by an iron-making blast furnace. In addition, the technical scheme of the invention is different from the preparation process of other inorganic binder stabilized soil and solidified soil, not only the environmental performance index of the improved roadbed filler meets the requirement, but also the preparation process has no dust pollution, and the comprehensive cost of the discharge and disposal of engineering construction solid wastes is greatly reduced.
In order to further illustrate the invention, the following specific examples are also provided:
the technical scheme of the invention is applied to a roadbed reinforcement treatment engineering example, and the concrete implementation comprises two parts:
firstly, preparing an improved roadbed filling material:
(1) and collecting about 1890t of ballast bed ballast soil mixture cleared away by the railway maintenance construction of the factory area, piling up in the hardening place, after the loose state is preliminarily aired, adopting 70mm × 70mm square steel wire mesh screen to carry out coarse screening processing, clearing sundries and massive clay, and taking a covering measure to prevent rainwater from soaking.
(2) And preparing blast furnace ironmaking water granulated slag for about 210 t. The water content is required to be less than or equal to 5 percent, the loose state is not hardened, and after impurities are removed, a covering measure is adopted to prevent rainwater from wetting.
(3) And preparing the grain slag improved ballast soil mixture. Adopting a metering control manual matching machine: preparing 1:10 water slag improved ballast soil mixture 1225t (water slag 113t and ballast soil mixture 1112t) for replacing fillers of a subgrade bed base layer; preparation 1: the 8 water slag modified ballast soil mixture 875t (water slag 97t and ballast soil mixture 778t) is used for changing the filler of the roadbed bed surface layer. The operation requirements are as follows: strictly metering, uniformly mixing, covering, and preventing rain and soaking for later use.
Secondly, roadbed reinforcement treatment, as shown in fig. 1:
firstly, transacting railway sealing construction, excavating and removing weak disease bodies (the thickness of a common load railway roadbed is 1.2m and the width is 5m) in a roadbed range, backfilling 1:10 water slag modified ballast soil mixture at the bottom layer of the roadbed, compacting the thickness of 0.7m (the compaction degree is more than or equal to 92 percent), and using 1225t of modified roadbed filling materials; 1:8 of water slag improved ballast soil mixture is backfilled on the surface layer of the foundation bed, the compacted thickness is 0.5m (the rolling compaction degree is more than or equal to 95 percent), the reserved sedimentation amount is 12mm, and 875t of improved roadbed filler is used; the operation requirement is as follows: and measuring and controlling the excavation processing range of the roadbed, keeping the foundation trench free of accumulated water during backfilling, avoiding construction in rainy days, backfilling in time, and rolling densely in layers.
In the embodiment of the railway subgrade adopting the blast furnace granulated slag improved ballast soil mixture filling and reinforcing treatment, the track state tends to be stable after the train runs for 30d, the bearing capacity test value of the subgrade surface reaches 0.17MPa, the pH value is tested by on-site sampling pH value 8.4, and the application effect is surface: the grain slag improved ballast soil filler is applied to reinforcement treatment of the railway subgrade, the strength of the roadbed surface meets the requirement of bearing capacity, the water temperature state is stable, the detected pH value index meets the environmental protection requirement, the comprehensive benefit is obvious, and the popularization and practical value is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (8)
1. The metallurgical plant and mine railway roadbed filler is characterized by being prepared by fully mixing and improving a ballast-soil mixed material and blast furnace water granulated slag according to a certain proportion.
2. The filler for railroad beds of metallurgical plants and mines according to claim 1, wherein: the ballast soil mixed material is used for collecting and utilizing large-batch ballast soil mixed materials in hardened roadbed or stock road shoulder barriers cleared in metallurgical plant and mine railway maintenance or modification engineering construction, and mainly comprises the following components: rubble, coal coke powder mineral substance, clay granule adopt 70 mm's in aperture steel wire mesh screen to screen rough machining, clear away weeds rubbish, reject the clay piece, this kind of tiny fragments of stone, coal, etc. soil mixture reaches through the screening test: the content of the particulate matters with the particle diameter phi of more than or equal to 2mm is more than or equal to 70 percent, the tested Ph value is less than 9, and the maximum dry density is 2.1g/cm3。
3. The filler for railroad beds of metallurgical plants and mines according to claim 1, wherein: the blast furnace granulated slag adopts cold-state granular granulated slag produced by an iron-making blast furnace, and the main physicochemical indexes are as follows: the particle size is 0.5mm-2mm, and the bulk volume weight is as follows: 0.71-0.83g/cm3Containing silicic acidDicalcium, tricalcium silicate, magnesium silicate, aluminum silicate, manganese silicate and small amounts of iron silicate, which are weakly basic.
4. The filler for railroad beds of metallurgical plants and mines according to claim 1, wherein: the mass ratio of the blast furnace granulated slag to the ballast soil mixture is 1:11-1: 8; wherein, the filler for the roadbed bed surface layer adopts blast furnace granulated slag: the mixture of the ballast soil is 1:9-1:8, and the backfilling and rolling compactness is more than or equal to 95 percent; the bottom filler for the subgrade bed adopts blast furnace granulated slag: the mixture of the ballast soil is 1:11-1:10, and the backfilling and rolling compactness is more than or equal to 92%.
5. The filler for railroad beds of metallurgical plants and mines according to claim 1, wherein: the water content of the ballast soil mixture used on site is controlled to be 3% -6%, the water content of the blast furnace granulated slag is less than or equal to 5%, the mixture is uniformly mixed on site or in a fixed site and is used along with stirring, the storage period is not more than 15d, and the construction in rainy days needs to be protected from rain and water in time.
6. A method of applying the filler for railroad bed of metallurgical plants and mines according to claim 1, characterized by comprising the following steps:
s1: selecting and processing roadbed filling: (1) collecting a large batch of ballast soil mixed materials of hardened road bed or stock road shoulder obstacles removed in the maintenance or modification engineering construction of metallurgical plant and mine railways; (2) cold granular water slag generated by an iron-making blast furnace is used as blast furnace water slag;
s2: the improved application of the roadbed filling material comprises the following steps: the ballast soil mixed material and the blast furnace water granulated slag in the S1 are fully mixed and improved according to a certain proportion, so that the physicochemical property of the mixture is improved, the coarse and fine aggregate particles are reasonably and compactly bonded, and the pH value is less than or equal to 9, which meets the environmental protection requirement;
s3: selecting an application scheme of the roadbed filling material: through combining the application and analysis of the geotechnical test, the mass mixing ratio range of the blast furnace granulated slag improved ballast soil mixed material is as follows: blast furnace granulated slag: the mixture of the ballast soil is 1:11-1: 8.
7. The method of claim 6, wherein the step S3 is applied to the ordinary railway roadbed filler, wherein the roadbed bedding layer adopts a ratio of 1:9-1:8, backfilling the blast furnace granulated slag improved ballast soil mixture to a thickness of 0.5 m; the subgrade bed bottom layer adopts a structure of 1:11-1: the backfill thickness of the 10 blast furnace granulated slag modified ballast soil mixture is 0.7m, and the bearing capacity of a roadbed surface is more than or equal to 0.16 MPa.
8. The method of claim 6, wherein the step S3 is applied to the heavy rail railway subgrade bed filler, wherein the subgrade bed surface layer is 1:9-1:8, backfilling the blast furnace granulated slag improved ballast soil mixture to a thickness of 0.7 m; the subgrade bed bottom layer adopts a structure of 1:11-1: the backfill thickness of the 10 blast furnace granulated slag modified ballast soil mixture is 0.8m, and the bearing capacity of a roadbed surface is more than or equal to 0.22 MPa.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01207501A (en) * | 1988-02-16 | 1989-08-21 | Kobe Steel Ltd | Simplified pavement material and simplified pavement construction |
| CN102127889A (en) * | 2010-10-18 | 2011-07-20 | 新兴铸管股份有限公司 | Method for constructing roadbed of reinforced concrete pavement of road |
| CN107012748A (en) * | 2017-03-24 | 2017-08-04 | 金川集团股份有限公司 | A kind of method that railway line is laid on loose smelted furnace cinder |
| CN110482998A (en) * | 2019-09-05 | 2019-11-22 | 张建华 | A kind of light material and preparation method thereof for railway bed |
| CN113213863A (en) * | 2021-05-11 | 2021-08-06 | 和县飞竣新型建材有限公司 | High-gelation water-quenched slag permeable pavement material and manufacturing method thereof |
-
2022
- 2022-01-21 CN CN202210070748.3A patent/CN114319311A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01207501A (en) * | 1988-02-16 | 1989-08-21 | Kobe Steel Ltd | Simplified pavement material and simplified pavement construction |
| CN102127889A (en) * | 2010-10-18 | 2011-07-20 | 新兴铸管股份有限公司 | Method for constructing roadbed of reinforced concrete pavement of road |
| CN107012748A (en) * | 2017-03-24 | 2017-08-04 | 金川集团股份有限公司 | A kind of method that railway line is laid on loose smelted furnace cinder |
| CN110482998A (en) * | 2019-09-05 | 2019-11-22 | 张建华 | A kind of light material and preparation method thereof for railway bed |
| CN113213863A (en) * | 2021-05-11 | 2021-08-06 | 和县飞竣新型建材有限公司 | High-gelation water-quenched slag permeable pavement material and manufacturing method thereof |
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