CN101319483A - Roadbed filling construction method with physically improved fine sand - Google Patents
Roadbed filling construction method with physically improved fine sand Download PDFInfo
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- CN101319483A CN101319483A CNA2008100456076A CN200810045607A CN101319483A CN 101319483 A CN101319483 A CN 101319483A CN A2008100456076 A CNA2008100456076 A CN A2008100456076A CN 200810045607 A CN200810045607 A CN 200810045607A CN 101319483 A CN101319483 A CN 101319483A
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Abstract
The invention provides a physically improved construction method for filling a road bed by powdery fine sands, comprising the following steps of: grain analysis; process test; the first mixing; the second mixing; transportation; the third mixing; filling and acceptance. The method has the characteristics of reasonably utilizing the powdery fine sands, lowering construction cost, saving investment, overcoming the defect of filling the road bed by the powdery fine sands, improving the dynamic load bearing capability of the road bed, prolonging the service life of the construction and facilitating the speedup of the construction process, along with strong constructional operability and convenient heavy construction.
Description
Technical field
The present invention relates to a kind of civil engineering method, particularly a kind of powder fine sand roadbed filling job practices.
Background technology
In the construction of high grade pavement, require settlement amount after construction little, the surface evenness height.This is not difficult to accomplish for hard soil foundation.But, be a construction Difficulties for soft foundation always.In the construction technology at the existing exploitation of soft foundation, soil replacement method, mounding and vertical drain method (CN1158434C), concrete agitation pile method (CN1563584A) and EPS polystyrene foam plate stuffing process (CN1760) etc. are arranged.
In soft foundation, based on the difficulty of construction maximum of the soft foundation of powder fine sand.Sand grain content is big, clay content is little owing to (85% particle mainly concentrates between 0.25mm～0.075mm) in the powder fine sand, be difficult for forming plate body, the easily liquefaction of immersion vibrations back, loose when dry, caking property and plasticity are all very little, as, Inner Mongolia Autonomous Region Yi Min to Ilyushin execute railway line, the full railway engineering in sea is passed through large tracts of land powder fine sand base band, ground is mainly the fine sand layer of yellow or yellow-white, and the part location reaches more than hundred meters deeply.Adopt existing above-mentioned conventional job practices all can't satisfy the basic demand that roadbed is built.
Summary of the invention
The purpose of this invention is to provide a kind of on the powder fine sand foundation road construction strong operability, be convenient to the high strength construction operation, rationally utilize the roadbed filling construction method of the physically improved fine sand of powder fine sand.
The object of the present invention is achieved like this: a kind of roadbed filling construction method of physically improved fine sand, carry out according to the following steps:
A), filler analysis:
Powder fine sand, gravelly soil, the gravelly soil material source that fetches earth is carried out the indoor particle analysis, determine its classification, measure natural aqueous rate, grain density, maximum and minimum dry density;
B), engineer testing:
According to a step filler analysis result, primary election is mixed mixing ratio, is mixed mixing ratio preparation filler by primary election, fills test in the experiment place, thereby determines construction parameter;
B1), mixing mixing ratio determines:
Draft 3～5 and mix the mixing ratio scheme, mixing on the definite basis of the classification of preparing burden, by relative density and grain density test, measure and respectively mix the original construction parameter of mixing ratio scheme, after it was estimated, the mixing ratio scheme was mixed in further definite 1～2 construction;
B2), prepare the test site:
Each test site requires in flat segments, length 50m, and width 20m, planeness satisfies code requirement; B3), filling parameter determines: according to selected construction equipment, the combination of carrying out various duty parameters rolls and compacted density test and compressive settlement's amount, and the sampling and measuring moisture content.Determine that according to result of the test constructions such as layer thickness, moisture content, watering amount, number of rolling, road speed roll parameter;
C), once mix:
Before generous amount is filled operation, mix mixing ratio according to what engineer testing was determined, gravelly soil or gravelly soil: powder fine sand=layering in 6: 4 is stacked, promptly stack the powder fine sand of a bed thickness 0.40m earlier in selected mix place, the back adopts the method for attacking and occupying to stack gravelly soil or the gravelly soil of a bed thickness 0.60m, utilize watering or airing to regulate and mix the moisture content of batching, mix to reach the construction optimum moisture content, to finish once for this reason;
D), secondary mixes:
Secondary is mixed and being joined construction and exploit transportation in conjunction with the layering windrow as filling material, utilize backacter to carry out facade exploitation and entrucking during exploitation, once this layer stacking one deck being mixed and stirred the material exploitation during exploitation finishes, excavation height 3m, backhoe is in discharging during to the vehicle wagon box, dump skip control highly is 1.2～1.5m, so that the excavated material uniformly dispersing is in the compartment;
E), mix for three times:
Mix when expecting to be transported to the roadbed filling work plane, fill out the selected discharging spacing of thickness, quincuncial arrangement according to the shop that test is determined, retreat the method discharging,, use ridge buster when putting down material for the first time with the flat material twice of the bulldozer that has ridge buster, mention ridge buster when secondary is put down material, finish three times and mix;
After above-mentioned mix for three times, powder fine sand and gravelly soil (gravelly soil) can reach that mix is even, grating is reasonable;
F), filling construction:
Adopt the job practices of placement in layers, layered rolling during construction.Banket according to the subgrade cross section overall with is longitudinal layered when horizontal slice is filled, every layer of employing be with a kind of filler of mixing mixing ratio, forbids the filler that two or more differences are mixed mixing ratio mixed and fill out; Adopt bulldozer vertically to nappe and fill material, each layer thickness is no more than 0.35m, and after total layer thickness reached the definite depth of packing ± 0.05m of engineer testing, the construction parameter of determining according to engineer testing with road roller rolled;
G), check and accept:
After every layer of placement grinding reaches the definite number of rolling of scheme, adopt dull and stereotyped load instrument K30 method and sand replacement method/douche to detect, after the acceptance(check), can descend one deck to fill the construction of layer; From result of the test, all reach design and specification technique requirement by the every detection index of filling compaction quality after the improvement.
Construction technology process is summarized as follows: grading analysis → engineer testing → once mix → secondary mixes → transports → mix → fill for three times → check and accept.
The technological principle of this worker method is:
Because sand grain content is big in the powder fine sand soil earth, clay content is minimum, and 85% particle mainly concentrates between particle diameter 0.25mm～0.075mm, caking property and plasticity are very little, carry out roadbed filling with flour sand or fine sand merely, its formation be the prose style free from parallelism structure of loosening, can't satisfy the requirement of roadbed integrated carrying.
In conjunction with engineering construction reality, utilize the powder fine sand of subgrade construction excavation, mix gravelly soil or gravelly soil by a certain percentage, powder fine sand material is carried out physically improved, improve its physical composition structure, overcome the shortcoming of powder fine sand as roadbed filling.
People's Armed Police electricity power forces bear Inner Mongolia Autonomous Region Yi Min to the Ilyushin construction of railways, for guaranteeing construction quality, solution roadbed filling material fetches earth, and material source is far away, cost is high, many unfavorable construction problems such as powder fine sand filling construction difficulty, progress is slow, efficient is low, quality can not guarantee, in conjunction with engineering reality, physically improved fine sand filling construction technology is carried out development test, formed physically improved fine sand filling construction worker method, and tentatively pass through audit, the evaluation of these railway construction headquarter.Through self check and the parallel testing result of supervisor, fill quality and can reach design and demand of technical standard.This constructure scheme reduces fortune far away material for public use 1,500,000 sides, optimizes and has reduced to fill section, has improved the mechanized construction degree greatly, has guaranteed construction speed, saves about 40,000,000 yuan of construction investment.Engineering practice proves that it is feasible that the powder fine sand fills physically improved roadbed construction method.
Characteristics of the present invention and beneficial effect are:
1, overcome and only used the filling roadbed defective of powder fine sand, improved roadbed and bear the dynamic load ability, prolonged the engineering life-span.
2, construction is workable, is convenient to the high strength construction operation, helps accelerating construction progress.
3, engineering construction quality is guaranteed easily, can satisfy the requirement of roadbed design and standard.
4, rationally utilize the powder fine sand, can reduce construction costs, save investment.
The specific embodiment
One, construction technology process:
1, key points for operation:
(1), filler analysis:
The material source soil sample test of mainly carrying out the powder fine sand, mixing adapted gravelly soil or gravelly soil, comprise: indoor particle analysis, relative density, grain density test, determine each filler and mix the classification of batching, measure natural aqueous rate, grain density, maximum and minimum dry density.
(2), engineer testing:
Powder fine sand, gravelly soil, gravelly soil are fetched earth after material source carried out the indoor particle analytical test, and mixing ratio is mixed in primary election, mixes mixing ratio preparation filler by primary election, and test is filled in the optional test place, by testing definite construction parameter.
A, mix mixing ratio and determine: draft 3～5 and mix the mixing ratio scheme, after having determined to mix the classification of batching,, measure and respectively mix the original construction parameter of mixing ratio scheme by relative density and grain density test, the feasibility of discussion scheme, mixing ratio is mixed in further definite 1～2 construction.
Prepare b, test site: each test site requires in flat segments, length 50m, and width 20m, planeness satisfies code requirement.
C, fill parameter and determine: according to selected construction equipment, the combination of carrying out various duty parameters rolls and compacted density test and compressive settlement measure, and the sampling and measuring moisture content.Determine that according to result of the test constructions such as layer thickness, moisture content, watering amount, number of rolling, road speed roll parameter.
(3), once mix:
Before generous amount is filled operation, (gravelly soil or gravelly soil: powder fine sand=6: 4) layering is stacked to determine to mix mixing ratio in strict accordance with engineer testing, promptly stack one deck powder fine sand (0.40m) earlier in the selected place of mixing and stirring, the back adopts the method for attacking and occupying to stack one deck gravelly soil or gravelly soil (0.60m), utilize watering or airing to regulate and mix the moisture content of batching, mix to reach the construction optimum moisture content, to finish once thus.Concrete job practices: whenever keep at a certain distance away along roadbed and to select suitable location as once mixing the place nearby, roping powder fine sand and gravelly soil (gravelly soil) are to once mixing the place respectively, and heap is high to excavate height 3m control with excavator economy; The roping ratio adopts layering cell thickness (mixing upright scale around the place) to control, and the layering of two kinds of material is stacked, the direct discharging of powder fine sand, and gravelly soil or gravel earth material adopt attacks and occupies the method discharging, and flat material adopts bulldozer; Discharging, flat material process can be sprinkled water or airing as required, mix the moisture content of batching with adjusting.
(4), secondary mixes:
Secondary is mixed and being joined construction and exploit transportation in conjunction with the layering windrow as filling material, utilize backacter to carry out facade exploitation and entrucking during exploitation, once this layer stacking one deck being mixed and stirred the material exploitation during exploitation finishes, excavation height 3m, backhoe is in discharging during to the vehicle wagon box, dump skip control highly is 1.2～1.5m, so that the excavated material uniformly dispersing is in the compartment.
(5), mix for three times:
Mix when expecting to be transported to the roadbed filling work plane, fill out the selected discharging spacing of thickness, quincuncial arrangement according to the shop that test is determined, retreat the method discharging,, use ridge buster when putting down material for the first time with the flat material twice of the bulldozer that has ridge buster, mention ridge buster when secondary is put down material, finish three times and mix.
After above-mentioned mix for three times, powder fine sand and gravelly soil (gravelly soil) can reach that mix is even, grating is reasonable.
(6), filling construction:
Adopt the job practices of placement in layers, layered rolling during construction.Banket according to the subgrade cross section overall with is longitudinal layered when horizontal slice is filled, every layer of employing be with a kind of filler of mixing mixing ratio, forbids the filler that two or more differences are mixed mixing ratio mixed and fill out.Adopt bulldozer vertically to nappe and fill material, each layer thickness is no more than 0.35m, and after total layer thickness reached the definite depth of packing ± 0.05m of engineer testing, the construction parameter of determining according to engineer testing with road roller rolled.
(7) check and accept:
After every layer of placement grinding reaches the definite number of rolling of scheme, adopt dull and stereotyped load instrument K30 method and sand replacement method/douche to detect, after the acceptance(check), can descend one deck to fill the construction of layer.From result of the test, all reach design and specification technique requirement by the every detection index of filling compaction quality after the improvement.
Two, material and equipment
1, material:
The excavation backfill utilizes cutting excavation powder fine sand, mixes batching and utilizes near road foundation gravel earth material along the line and gravelly soil stock ground.
2, equipment:
The specification of equipment model is selected can satisfy technical requirements, and engineering quantity and duration of a project that usage quantity is finished with plan determine that single construction operation face is equipped with device category, specification, model and quantity and sees Table.
The main construction equipment table of single construction operation face
| Sequence number | Device name | Unit type | Unit | Quantity | Remarks |
| 1 | Vibrating roller | YZ20A | Platform | 1 | Exciting force 360/280 (KN), amplitude 1.6～1.8mm |
| 2 | Bulldozer | T220(D80A-18) | Platform | 1 | 126Kw, deadweight 25.7T |
| 3 | Backacter | 330B | Platform | 3 | 1.6m 3 |
| 4 | Dump truck | 15～20T | Platform | 8 | / |
| 5 | Special-purpose sprinkling truck | 8T | Platform | 1 | / |
| 6 | Land leveller | CLY418(160) | Platform | 1 | Vehicle commander 9m, rubber wheel type |
Three, quality control
1, material source control:
(1), the raw material material source that is used to improve is tested before marching into the arena accordingly;
(2), when in selected scope, fetching earth, remove trees, turf and surperficial humus soil on the place;
(3), when Tu Yuan occur to change, the engineer testing of must reforming as requested.
2, mix the control of material moisture content:
(1), after mixing and stirring one time, check the moisture content once mix and stir compound;
(2), when moisture content is excessive, paves and carry out airing;
(3), when moisture content is too small, with the watering of jet tube sprinkling truck;
(4), the sprinkling truck must not tune and stop on the highway section of mixing and stirring and the same day, plan was mixed and stirred.
3, admixture mixes and stirs control:
(1), according to the different construction sections of dividing of the stage of filling, be divided into bottom and prepare section, mix and stir the section that paves, roll integer section and the detection section that applies for checking and examination, select relevant device for use;
(2), admixture must be by mixing through the job instruction examined, must be when feeding intake in strict accordance with proportional control, strengthen stirring, mixing when the charging apparatus bucket capacity digs dress, flat material to admixture, guarantee to mix even.
4, roll the control of quality:
(1), according to selected compacting machinary and technological experiment, the compacted density of strict control filling kind and requirement;
(2), the loose laying depth that must not determine greater than technological experiment of placement in layers thickness, filler of different nature fills respectively, must not mix and fill out;
(3), when filler paves, earlier smooth with land leveller with the just flat back of bulldozer, it is concavo-convex that the packing course face does not have significant part, makes the transverse drainage slope to both sides;
(4), compacting order is according in the middle of two rear flank earlier, the operation sequence cal rolling that shakes, shakes by force again a little less than behind the first static pressure, the road speed of vibrating roller is controlled in 1.5～2.5km/h scope;
(5), longitudinal lap joint length is not less than 2m, road along the line vertically row with capable between the overlapping 40cm that is not less than of compacting, levels is filled joint and is staggered and be not less than 3m;
(6), the following Embankment Compaction Quality quality of bedding is according to the relevant quality specifications control of design and country, adopts dull and stereotyped load instrument K30 method and sand replacement method/douche to detect.
5, finish the quality control of road bed:
The road surface is filled stone and is adopted and to attack and occupy the method stone, prevents that heavy vehicle from walking on the road bed of acceptance(check) just repeatedly, avoids disturbance and destroys qualified roadbed.
6, quality specifications:
Strict carry out " railway bed job specfication " (TB10202-2002) and the design pertinent regulations.
Four, safety and environmental practice
1, conscientiously carries out the policy of environmental protection and occupational health safety, set up perfect environmental protection and OHSMS, set up environmental protection and safety construction full-time administrative mechanism and special part-time security official, do a good job of it the environmental protection and the safety in production of engineering;
2, safety construction is carried out in strict accordance with the act of technique for security of correlation engineering;
3, to height dig, high embankment and the relatively poor location of road conditions will carry out security warning, requires sign obvious, clear, connection and reasonable arrangement;
4, be the protection grassland,, forbid disorderly to press the meadow in strict accordance with carriage way planned in advance walking;
5, various vehicles can not surpass 15Km/h in the work area speed of service, no over-loading, violating the regulations overtaking other vehicles;
6, carry out the drainage works of spoil ground, and in time the spoil ground is pushed away flat, consolidation;
7, fetch earth in strict accordance with the scope of having planned of fetching earth, forbid disorderly to dig;
8, in time to the pioneer road maintenance of sprinkling water, prevent the dust pollution grassland;
9, note the protection water source, near the water source construction site, should accomplish nonvoluntary polluted source, inaccurate arbitrarily change water source flows to.
Five, performance analysis
Adopt can significantly reduce the powder fine sand after this worker method get, abandon stock ground occupying to vegetation such as near the grasslands roadbed, avoided the remote outward transport of full side's amount filler, simultaneously because filler is formed the adjustment of structure, the roadbed filling section is optimized to be reduced, comprehensively fill unit price and save 7.2 yuan/m3, average every kilometer roadbed filling is economized on the use of funds 500,000 yuan.This worker method is easy and simple to handle, quality is easy to control, not only improved construction intensity greatly, and the utmost point has guaranteed construction quality on ground, and social benefit and economic benefit are all better.
Six, application example
Hulunbeier City, Inner Mongol newly built railway Yi Min executes the powder fine sand subgrade construction of line (be called for short two she railway engineering) to Ilyushin.
1, project profile:
Newly built railway Yi Min executes to Ilyushin that lineman's journey is positioned at Hulunbeier City, the Inner Mongol and Hinggan League is domestic.Starting point is the Yi Min town (Yi Min branch line terminal Yi Min station) in the flag of Ewenki, Hulunbeier City, after circuit is crossed over the brightness river southwards, through the Xinbaerhu Left Banner, terminal point is the Aer Mountain northern station of Hinggan League Aershan City, the Yi Min line is connected perforation with white Ah line, form the western passage of going to the capital in the Northeast, be the newly built railway in the middle long railway network planning, this total track length 185.335Km.
2, condition of construction:
According to gathering materials on the spot, protect ecological principle; unit in charge of construction (People's Armed Police electricity power forces) to the powder fine sand of nearly 90Km filling roadbed carry out physically improved; adopt circle gravel soil (gravelly soil) and powder fine sand to mix construction; grading analysis according to material source; experimental stage has been chosen round gravel soil (gravelly soil): powder fine sand=5: 5,6: 4,7: 3 (being volume ratio) three kinds are mixed mixing ratio and carried out filling construction test, have determined gravelly soil (gravelly soil) according to the test testing result: the mixing ratio of mixing of powder fine sand=6: 4 is the filling construction scheme.This constructure scheme reduces fortune far away material for public use 1,500,000 sides, optimizes and has reduced to fill section, has improved the mechanized construction degree greatly, has guaranteed construction speed, saves about 40,000,000 yuan of construction investment.
Claims (3)
1, a kind of roadbed filling construction method of physically improved fine sand is characterized in that: carry out according to the following steps:
A), filler analysis:
Powder fine sand, gravelly soil, the gravelly soil material source that fetches earth is carried out the indoor particle analysis, determine its classification, measure natural aqueous rate, grain density, maximum and minimum dry density;
B), engineer testing:
According to a step filler analysis result, mixing ratio is mixed in primary election, mixes mixing ratio preparation filler by primary election, fills test in the experiment place, thereby determines construction parameter;
B1), mixing mixing ratio determines: draft 3～5 and mix the mixing ratio scheme, mixing on the definite basis of batching classification,, measure and respectively mix the original construction parameter of mixing ratio scheme by relative density and grain density test, after its evaluation, the mixing ratio scheme is mixed in further definite 1～2 construction;
B2), the test site prepares: each test site requires in flat segments, length 50m, width 20m, planeness satisfies code requirement;
B3), filling parameter determines: according to selected construction equipment, the combination of carrying out various duty parameters rolls and compacted density test and compressive settlement's amount, and the sampling and measuring moisture content.Determine that according to result of the test constructions such as layer thickness, moisture content, watering amount, number of rolling, road speed roll parameter;
C), once mix:
Before generous amount is filled operation, mix mixing ratio according to what engineer testing was determined, gravelly soil or gravelly soil: powder fine sand=layering in 6: 4 is stacked, promptly stack the powder fine sand of a bed thickness 0.40m earlier in selected mix place, the back adopts the method for attacking and occupying to stack gravelly soil or the gravelly soil of a bed thickness 0.60m, utilize watering or airing to regulate and mix the moisture content of batching, mix to reach the construction optimum moisture content, to finish once for this reason;
D), secondary mixes:
Secondary is mixed and being joined construction and exploit transportation in conjunction with the layering windrow as filling material, utilize backacter to carry out facade exploitation and entrucking during exploitation, once this layer stacking one deck being mixed and stirred the material exploitation during exploitation finishes, excavation height 3m, backhoe is in discharging during to the vehicle wagon box, dump skip control highly is 1.2～1.5m, so that the excavated material uniformly dispersing is in the compartment;
E), mix for three times:
Mix when expecting to be transported to the roadbed filling work plane, fill out the selected discharging spacing of thickness, quincuncial arrangement according to the shop that test is determined, retreat the method discharging,, use ridge buster when putting down material for the first time with the flat material twice of the bulldozer that has ridge buster, mention ridge buster when secondary is put down material, finish three times and mix;
After above-mentioned mix for three times, powder fine sand and gravelly soil (gravelly soil) can reach that mix is even, grating is reasonable;
F), filling construction:
Adopt the job practices of placement in layers, layered rolling during construction.Banket according to the subgrade cross section overall with is longitudinal layered when horizontal slice is filled, every layer of employing be with a kind of filler of mixing mixing ratio, forbids the filler that two or more differences are mixed mixing ratio mixed and fill out; Adopt bulldozer vertically to nappe and fill material, each layer thickness is no more than 0.35m, and after total layer thickness reached the definite depth of packing ± 0.05m of engineer testing, the construction parameter of determining according to engineer testing with road roller rolled;
G), check and accept:
After every layer of placement grinding reaches the definite number of rolling of scheme, adopt dull and stereotyped load instrument K30 method and sand replacement method/douche to detect, after the acceptance(check), can descend one deck to fill the construction of layer.From result of the test, all reach design and specification technique requirement by the every detection index of filling compaction quality after the improvement.
2, according to the roadbed filling construction method of the described physically improved fine sand of claim 1, it is characterized in that: the primary election volume is mixed mixing ratio and is in the test of described b process: gravelly soil/gravelly soil: powder fine sand=5: 5,6: 4 or 7: 3.
3, according to the roadbed filling construction method of the described physically improved fine sand of claim 2, it is characterized in that: the primary election volume is mixed mixing ratio and is in the test of described b process: gravelly soil/gravelly soil: powder fine sand=6: 4.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN103174073A (en) * | 2013-03-22 | 2013-06-26 | 中国十九冶集团有限公司 | Desert silt soil backfill compaction construction method |
| CN104846726A (en) * | 2015-04-24 | 2015-08-19 | 华能伊敏煤电有限责任公司 | Road construction method for strip mine |
| CN107119521A (en) * | 2017-05-25 | 2017-09-01 | 中国水利水电第十工程局有限公司 | It is a kind of to improve the method that High water cut silt and silt carry out roadbed filling |
| CN108643165A (en) * | 2018-03-08 | 2018-10-12 | 中国铁路设计集团有限公司 | A kind of preparation method of the artificial Coarse Aggregate based on Extra-fine sand matrix |
| 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 |
| CN109610244A (en) * | 2018-12-25 | 2019-04-12 | 四川天鑫达建筑工程有限公司 | The physically improved roadbed filling method of fine silt |
| CN110184870A (en) * | 2019-06-17 | 2019-08-30 | 中交第三公路工程局有限公司 | Subtropical mountains highway mixture roadbed filling method |
| CN111021173A (en) * | 2019-12-31 | 2020-04-17 | 郑州一建集团有限公司 | Construction method of municipal road sand-filled roadbed |
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| CN1206423C (en) * | 2003-02-20 | 2005-06-15 | 河海大学 | Constructing method for treating soft foundation of highway by cement, flyash and macadam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN103174073A (en) * | 2013-03-22 | 2013-06-26 | 中国十九冶集团有限公司 | Desert silt soil backfill compaction construction method |
| CN103174073B (en) * | 2013-03-22 | 2016-01-13 | 中国十九冶集团有限公司 | Desert silt soil backfill compaction construction |
| CN104846726A (en) * | 2015-04-24 | 2015-08-19 | 华能伊敏煤电有限责任公司 | Road construction method for strip mine |
| CN107119521A (en) * | 2017-05-25 | 2017-09-01 | 中国水利水电第十工程局有限公司 | It is a kind of to improve the method that High water cut silt and silt carry out roadbed filling |
| CN107119521B (en) * | 2017-05-25 | 2019-12-17 | 中电建十一局工程有限公司 | Method for improving high-water-content silt and silt soil to fill roadbed |
| CN108643165A (en) * | 2018-03-08 | 2018-10-12 | 中国铁路设计集团有限公司 | A kind of preparation method of the artificial Coarse Aggregate based on Extra-fine sand matrix |
| 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 |
| CN109610244A (en) * | 2018-12-25 | 2019-04-12 | 四川天鑫达建筑工程有限公司 | The physically improved roadbed filling method of fine silt |
| CN110184870A (en) * | 2019-06-17 | 2019-08-30 | 中交第三公路工程局有限公司 | Subtropical mountains highway mixture roadbed filling method |
| CN111021173A (en) * | 2019-12-31 | 2020-04-17 | 郑州一建集团有限公司 | Construction method of municipal road sand-filled roadbed |
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