CN103864371A - Backfill for checking peripheral settlement of wells and pipelines and preparation method of backfill - Google Patents
Backfill for checking peripheral settlement of wells and pipelines and preparation method of backfill Download PDFInfo
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- CN103864371A CN103864371A CN201410095635.4A CN201410095635A CN103864371A CN 103864371 A CN103864371 A CN 103864371A CN 201410095635 A CN201410095635 A CN 201410095635A CN 103864371 A CN103864371 A CN 103864371A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 title abstract 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000002689 soil Substances 0.000 claims abstract description 62
- 238000010276 construction Methods 0.000 claims abstract description 51
- 239000004568 cement Substances 0.000 claims abstract description 44
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 238000013461 design Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 15
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- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000010881 fly ash Substances 0.000 claims description 72
- 238000007689 inspection Methods 0.000 claims description 52
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- 238000004140 cleaning Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 4
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- 229960001866 silicon dioxide Drugs 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 3
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses backfill for checking peripheral settlement of wells and pipelines and a preparation method of the backfill. The backfill consists of 0.5 percent of cement, 0.005 percent of water reducing agent, 20 percent of coal ash and 79.45 percent of undisturbed soil. During field preparation, every eight shovels of undisturbed soil are blended with every five shovels of coal ash, every forty shovels of coal ash are blended with a shovel of cement, the blending ratio of the manually filled water reducing agent is 1 percent of the cement amount, and the undisturbed soil, coal ash, cement and a water reducing agent are uniformly mixed. When the peripheral settlement of wells and pipelines is backfilled by adopting the backfill, the construction process is simple, the cost is low, and various test indexes accord with design specification requirements. Meanwhile, by utilizing the coal ash, the environmental pollution is reduced, the raw materials are saved, the cost of a thermal power plant used for storing the coal ash is saved, the construction cost is reduced, the soil land acquisition is reduced, the difficulty of land tension is relieved, and the backfill has obvious economic benefits and social benefits and has wide application and popularization prospects.
Description
Technical field
The invention belongs to technical field of civil engineering, relate in particular to a kind of backfill for inspection chamber and tube circumference sedimentation and preparation method thereof.
Background technology
Due to weather and other factors, there is the common fault of sinking because stability factor changes in the backfill of the various pipelines of public works and walling crib, backfill part cannot effectively be connected with road surface, the complicated construction technique of existing backfill pipeline, walling crib, the platform back of the body etc. simultaneously, waste of raw materials is serious, cost is higher, and every test index is more difficult reaches design specifications requirement, is prone to lower degradation disease and does over again.
Flyash is a kind of light weight, concrete dynamic modulus, uniform particles and the no adhesion material with certain water stability, and its pavement performance meets the technical requirements of highway construction standard.That flyash has is lightweight, compressibility is little, good penetrability, frictional coefficient are large and intensity advantages of higher, be specially adapted to the build of high-fill roadbed on soft foundation, flyash water regain is large, discharging capacity strong, construction compaction water content claimed range is wider, bring convenience to construction, especially rainy season construction more can embody its superiority.
Summary of the invention
The invention provides a kind of backfill for inspection chamber and tube circumference sedimentation and preparation method thereof, be intended to solve due to weather and other factors, there is the common fault of sinking because stability factor changes in the backfill of the various pipelines of public works and walling crib, backfill part cannot effectively be connected with road surface, the complicated construction technique of existing backfill pipeline, walling crib, the platform back of the body etc. simultaneously, waste of raw materials is serious, and cost is higher, and the more difficult problem that reaches design specifications requirement of every test index.
The object of the present invention is to provide a kind of backfill for inspection chamber and tube circumference sedimentation, this backfill that is used for inspection chamber and tube circumference sedimentation is to be made up of the raw material of following ratio of weight and number: cement 0.5%, the efficient early strong naphthalene water reducer 0.005% of DH-4003, flyash 20%, undisturbed soil 79.45%.
Further, this mixed ratio example design degree of mobilization that is used for the backfill of inspection chamber and tube circumference sedimentation is 148-168mm.
Further, silicon-dioxide SiO in flyash
2, aluminium sesquioxide Al
2o
3and ferric oxide Fe
2o
3total content >70%, loss on ignition≤0.75%, 0.3mm sieve aperture is by percentage>=90%, 0.075mm sieve aperture is by percentage>=81%, water ratio <35%.Loss on ignition is not more than 0.75%, the granule content 81% that particle diameter is less than 0.074 millimeter, and optimum moisture content is 27.6%, Maximum dry density is 1.15g/cm
3.
Further, cement selection P.C32.5 complex cement.
Further, before undisturbed soil uses, fragment, stone and the hard clod that is greater than 10cm will be picked, undisturbed soil must not adopt peat and the assorted soil of planting simultaneously.
Further, this is used for the backfill backfill inspection chamber of inspection chamber and tube circumference sedimentation and the method for tube circumference sedimentation is:
Around walling crib, pipeline or the bridges and culverts of labor cleaning's backfill, inspection chamber and tube circumference are wanted backfill simultaneously, and the discrepancy in elevation is no more than 25cm;
Do bearing capacity of foundation soil or undisturbed soil ground bearing strength test at excavation inspection chamber and tube circumference sedimentation periphery, in the time that bearing capacity of foundation soil meets design requirements, can carry out backfill;
Backfill answers layering to carry out, and every 25cm is thick is one deck, after backfill, vibrates evenly with vibrating head, closely knit without after bubble, then carries out lower floor's backfill;
After backfill, wipe one's face, flatten processing by workman, after final set, carry out health.
Further, in the time that bearing capacity of foundation soil is undesirable, should carry out ground processing, until bearing capacity of foundation soil carries out backfill again after meeting the requirements;
Health length of time is 7 days, and health is to after date, and detected intensity, carries out finished product examination after intensity is qualified.
Another object of the present invention is to provide a kind of preparation method of the backfill for inspection chamber and tube circumference sedimentation, this preparation method who is used for the backfill of inspection chamber and tube circumference sedimentation comprises the following steps:
Step 1, every eight spade undisturbed soils are admixed five spade flyash, the flyash mixed and spade cement of every 40 spades, the mixed ratio example of manually dosing water reducer is cement consumption 1%;
Step 2, manually by undisturbed soil, flyash, cement and water reducer uniform mixing.
Further, excessively wet flyash should carry out air-dry processing, the flyash of overdrying should be before mixing and stirring 2～3d shelving of sprinkling water, water content is adjusted to higher than optimum moisture content scope 5%～10%, when construction, water content should be higher than optimum moisture content 3%～5%.
Further, manually mix timing, need first coordinate platform scale to try to join with spade and bucket, determine the incorporation of each starting material and water content with the experience of repeatedly trying to join, then adopt spade and bucket directly manually to mix and stir, mix and stir and want evenly, to meet the requirement of design degree of mobilization.
Backfill for inspection chamber and tube circumference sedimentation provided by the invention and preparation method thereof, this backfill is made up of cement 0.5%, water reducer 0.005%, flyash 20%, undisturbed soil 79.45%, when on-the-spot preparation, every eight spade undisturbed soils are admixed five spade flyash, flyash mixed and the spade cement of every 40 spades, manually dose the mixed ratio example of water reducer for 1% of cement consumption, manually by undisturbed soil, flyash, cement and water reducer uniform mixing; While adopting this backfill backfill inspection chamber and tube circumference sedimentation, construction technology is simple, cost is lower, and every test index all meets design specifications requirement, and the utilization of flyash has simultaneously reduced the pollution to environment, save starting material, save the expense of heat power plant for storing fly ash, when reducing construction cost, reduced Tu Chang expropriation of land, alleviated the difficulty of land used anxiety, economic benefit and social benefit are remarkable, have wide application and promotion prospect.
Accompanying drawing explanation
Fig. 1 is the preparation method's of the backfill for inspection chamber and tube circumference sedimentation that provides of the embodiment of the present invention realization flow figure.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, and be not used in restriction invention.
The object of the present invention is to provide a kind of backfill for inspection chamber and tube circumference sedimentation, this backfill that is used for inspection chamber and tube circumference sedimentation is to be made up of the raw material of following ratio of weight and number: cement 0.5%, the efficient early strong naphthalene water reducer 0.005% of DH-4003, flyash 20%, undisturbed soil 79.45%.
In embodiments of the present invention, this mixed ratio example design degree of mobilization that is used for the backfill of inspection chamber and tube circumference sedimentation is 148-168mm.
In embodiments of the present invention, silicon-dioxide SiO in flyash
2, aluminium sesquioxide Al
2o
3and ferric oxide Fe
2o
3total content >70%, loss on ignition <0.75%, 0.3mm sieve aperture is by percentage >90%, 0.075mm sieve aperture is by percentage>=81%, water ratio <35%.Loss on ignition is not more than 0.75%, the granule content 81% that particle diameter is less than 0.074 millimeter, and optimum moisture content is 27.6%, Maximum dry density is 1.15g/cm
3.
In embodiments of the present invention, cement selection P.C32.5 complex cement.
In embodiments of the present invention, before undisturbed soil uses, fragment, stone and the hard clod that is greater than 10cm will be picked, undisturbed soil must not adopt peat and the assorted soil of planting simultaneously.
In embodiments of the present invention, this is used for the backfill backfill inspection chamber of inspection chamber and tube circumference sedimentation and the method for tube circumference sedimentation is:
Around walling crib, pipeline or the bridges and culverts of labor cleaning's backfill, inspection chamber and tube circumference are wanted backfill simultaneously, and the discrepancy in elevation is no more than 25cm;
Do bearing capacity of foundation soil or undisturbed soil ground bearing strength test at excavation inspection chamber and tube circumference sedimentation periphery, in the time that bearing capacity of foundation soil meets design requirements, can carry out backfill;
Backfill answers layering to carry out, and every 25cm is thick is one deck, after backfill, vibrates evenly with vibrating head, closely knit without after bubble, then carries out lower floor's backfill;
After backfill, wipe one's face, flatten processing by workman, after final set, carry out health.
In embodiments of the present invention, in the time that bearing capacity of foundation soil is undesirable, should carry out ground processing, until bearing capacity of foundation soil carries out backfill again after meeting the requirements;
Health length of time is 7 days, and health is to after date, and detected intensity, carries out finished product examination after intensity is qualified.
Fig. 1 shows the preparation method's of the backfill for inspection chamber and tube circumference sedimentation that the embodiment of the present invention provides realization flow.
This preparation method who is used for the backfill of inspection chamber and tube circumference sedimentation comprises the following steps:
Step S101, every eight spade undisturbed soils are admixed five spade flyash, the flyash mixed and spade cement of every 40 spades, the mixed ratio example of manually dosing water reducer is cement consumption 1%;
Step S102, manually by undisturbed soil, flyash, cement and water reducer uniform mixing.
In embodiments of the present invention, cross wet flyash and should carry out air-dry processing, the flyash of overdrying should be before mixing and stirring 2～3d shelving of sprinkling water, water content is adjusted to higher than optimum moisture content scope 5%～10%, when construction, water content should be higher than optimum moisture content 3%～5%.
In embodiments of the present invention, manually mix timing, need first coordinate platform scale to try to join with spade and bucket, determine the incorporation of each starting material and water content with the experience of repeatedly trying to join, then adopt spade and bucket directly manually to mix and stir, mix and stir and want evenly, to meet the requirement of design degree of mobilization.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
Starting material are selected pure pure flyash, and by detecting frequency, flyash is detected, guarantee that the factory of can not entering defective or that exceed standard is used, the flyash mixed proportioning example of mobility: mixed ratio example design degree of mobilization is (148-168) mm, indoor mixing by different proportionings joined test, determines that optimum mix is: cement 0.5%, water reducer 0.005%, flyash 20%, undisturbed soil 79.45%; Manually mix and stir the every eight spade undisturbed soils of mobility flyash backfill and admix five spade flyash, the flyash mixed and spade cement of every 40 spades, the outfit ratio of manually dosing water reducer is cement consumption 1%; Backfill is carried out in layering, and every 25cm is one deck.
Mobility flyash mix-design: the present invention uses Wuhai area flyash as one of main raw material(s), all technical must meet job specifications requirement, loss on ignition is not more than 0.75%, the granule content 81% that particle diameter is less than 0.074 millimeter, optimum moisture content is 27.6%, and Maximum dry density is 1.15g/cm
3; The starting material such as the flyash selected, cement, water reducer detect after qualified can carry out mix-design, mixed ratio example: mixed ratio example design degree of mobilization is 148～168mm, indoor mixing by different proportionings joined test, determine that optimum mix is: cement 0.5%, water reducer 0.005%, flyash 20%, undisturbed soil 79.45%; In construction, to strictly mix and stir by this proportioning, guarantee construction quality.
Mobility flyash scene is mixed and is joined, mix and stir: mix and stir at the whole scenes of backfill, when machinery mixes and stirs, amalgamator operator need input computer program accurately by proportioning, strict each raw-material mixed ratio example and the water content controlled, meet the requirements with the quality of guaranteeing mixture, when artificial mix, every eight spade undisturbed soils are admixed five spade flyash, flyash mixed and the spade cement of every 40 spades, the mixed ratio example of manually dosing water reducer is 1% of cement consumption, manually mix and join and need first coordinate platform scale to try to join with spade and bucket, determine the incorporation of each starting material and water content with the experience of repeatedly trying to join, then be that available spade and bucket etc. directly manually mix and stir, mix and stir and want evenly, meet the requirement of design degree of mobilization.
Mobility flyash backfill: before backfill, labor cleaning wants around walling crib, pipeline or the bridges and culverts of backfill, native fragment, stone and the hard clod that is greater than 10cm is picked before backfill, must not backfill peat and the assorted soil of planting, inspection chamber, tube circumference are wanted backfill simultaneously, and the discrepancy in elevation is no more than 25cm.
Before carrying out backfill, should do bearing capacity of foundation soil or undisturbed soil ground bearing strength test at excavation walling crib periphery, in the time that bearing capacity of foundation soil meets design requirements, can carry out backfill; When bearing capacity of foundation soil is undesirable, should carry out ground processing, until bearing capacity of foundation soil carries out backfill again after meeting the requirements, backfill answers layering to carry out, every 25cm is thick is one deck, after backfill, vibrates evenly with vibrating head, makes closely knit without after bubble, carry out again lower floor's backfill, after backfill, wipe one's face, flatten processing by workman, after its final set, carry out health, health length of time is 7 days, health, to after date, detects its intensity, after intensity is qualified, carries out finished product examination.
The requirement of each raw material:
Flyash: use the flyash in Wuhai area, silicon-dioxide SiO in flyash
2, aluminium sesquioxide Al
2o
3, ferric oxide Fe
2o
3total content is answered >70%, loss on ignition 50.75%, and 0.3mm sieve aperture is by percentage >90%, and 0.075mm sieve aperture is by percentage>=81%.Water ratio <35%.
Cement selection P.C32.5 complex cement.Cement Quality must comply with the national standard requirements, and cement and the substandard cement of quality of the caking that makes moist must not use, and all cement of showing up all will have product certificate.
Water reducer: and should there is good consistency between cement, mineral admixture; The water reducer adopting should be the product that feeler mechanism through possessing relevant qualification checked and had certificate of inspection, and its quality should meet existing national standard " concrete admixture " regulation (GB8076).
Undisturbed soil: the undisturbed soil of excavation, will pick native fragment, stone and the hard clod that is greater than 10cm not handy peat and the assorted soil of planting before use.
Water: all tap water all can use.
Main preparation of construction and detecting instrument table
Main preparation of construction (table 1)
The main preparation of construction of table 1
| Sequence number | Device name | Specifications and models | Quantity (platform) | Intact situation | Remarks |
| 1 | Excavator | CAT-70c | 1 | Well | ? |
| 2 | Shovel loader | ZQ30 | 2 | Well | ? |
| 3 | Dump truck | 15T | 5 | Well | ? |
| 4 | Forced mixer | JDY750 | 2 | Well | ? |
| 5 | Vibrating head | ? | 4 | Well | ? |
| 6 | Walkie fork lift truck | ? | 3 | Well | ? |
Main experimental, test set (table 2)
Table 2 main experimental, test set
Labor organization (table 3)
Table 3 labor organization
Quality control
Quality standard: the related request in strict accordance with " highway bridge and culvert construction technique normalizing ", " Of Road Engineering Quality Checking And Evaluation standard " (JTG F80/1-2004), " town road engineering construction and inspection of quality standard ", " code for construction and acceptance of water supply and sewerage pipeline engineering " detects.
The control of mobility flyash water content: the size of water content directly affects its closely knit effect in the backfilling process of free-flowing material flyash, therefore the construction of the control flow flyash backfill of water content is most important, and water content can be by regulating with construction section in the process of mixing and stirring.
Crossing wet flyash should be air-dry; Overdrying should be before mixing and stirring 2～3d shelving of sprinkling water, depending on shipment distance and weather condition, water content is adjusted to a little more than optimum moisture content scope, while generally construction, water content should be higher than optimum moisture content 3%～5%.
Maintenance and sealing quality control: carry out next procedure construction on the Flyash Layer that reaches acceptance requirement time, dummy car must not be reversed end for end, run at high speed and bring to a halt on molded section, in order to avoid destroy.As do not carried out immediately next procedure construction, forbid or limit Vehicle Driving Cycle and sprinkle water and soak in right amount, prevent that superficial drying is loose.
Quality control method: establish and improve the project system such as check of field test, quality inspection and inter process, test, check should accomplish that source recording is complete, and data are true and reliable.
Security measures: conscientiously implement the trouble-free service policy of " Safety first, precaution crucial ", the education that tightens security, Strengthens Safety Management, strict implement safety in production system and working specification, conscientiously carry out safety technique and tell somebody what one's real intentions are; Compound blending station should seal, and forbids that idler enters to mix and stir field, and supervisory control desk more needs stringent regulations, and only operator use; Mix and stir field eye-catching significant construction caution sign board will be set, and arrange personal management; Material loading passage forbids that personnel walk; The temporary electricity of working-yard is carried out in strict accordance with relevant specification regulation, and electrician must take appointment with certificate, the special scheme of strict implement temporary electricity; Before amalgamator start, to conscientiously check, guarantee that equipment performance is good, safe and reliable; After same day end-of-job, maintenance in time; While relieving, mutually carefully handing-over to check, fill in handover record; Construction road is unimpeded, and the rainy day, without muddy, is selected independent road as far as possible, avoids and public vehicles main public road; Sidewalk should be set up safety warning-panel along the line; It is correct, eye-catching that sign label is established at road junction, sends personal management, and no through traffic for non-engineering truck; In the course of the work, except unit staff, other staff must not be close for excavator, shovel loader, transport trolley, and establish special messenger and take charge and coordinate the operation of construction machinery close fit, in order to avoid grazing; When dump truck discharging, need special messenger to command, site traffic special messenger commander; Building site inflammable articles will be under lock and key, and carry out fire danger sign; The construction safety guarantee system of Erecting and improving, strengthens the safety inspection in construction operation, guarantees job standardization, standardization; Establish and improve fire, flood control Safety of Flood Control strick precaution emergency preplan, and tissue is drilled.
Environmental practice: after project management department marches into the arena, environmental protection, water guarantor work are carried out to comprehensive planning, the comprehensive regulation.Get in touch with local environmental protection, Shui Bao mechanism in time together with supervising engineer, observe the rules of relevant controlling environmental pollution, from organization and administration, prevent from and alleviate the many-sides such as water, topsoil, construction noise, vibration control, soil conservation, ecological environmental protection, dust Control, spoir control taking reasonable measure, minimum degree is down to to the impact of surrounding environment in working-yard, do sewage disposal well, prevent polluted water, carry out soil conservation; Set up environmental protection group, formulate environmental practice, project manager portion, construction team's management by different levels, be responsible for checking, supervising implementing of every efforts at environmental protection; Strengthen environmental protection knowledge education and management to workmen, improve workmen's environmental consciousness, participate in efforts at environmental protection positively, voluntary observance is about every rules and regulations of environmental protection; In living quarters, building site, Sewage treatment systems is set.And have interim sanitary sewage and collect facility, prevent that sewage from directly entering river and irrigation and drainage system; Stack in the place that the domestic refuse transporting something containerized in living quarters, building site to local environmental administration is specified, and is forbidden to pour in the waters such as river, avoids polluted-water, alluvial river, water channel and irrigation and drainage system; In construction, objectionable impurities and undressed construction waste water are not directly entered to river or other water body; Road-making material is stacked ground as far as possible away from Residential areas, river etc.Hide if desired, prevent polluted air and water body; Low noise emission product is paid the utmost attention in lectotype selection, and plant bottom case arranges earthquake-proof foundation, and specific embodiments is determined and implements after consulting with local environmental administration.Take measures or improve constructional method, as take noise elimination, sound absorption, sound insulation, damping or the measures such as isolation mounting are installed, making construction noise, vibration reach construction boundary environmental standard; Do not accomplish for some reason the position of place sclerosis, regularly compacting ground and watering, reduces the pollution of dust to surrounding environment; Do not burn at the construction field (site) the material of poisonous, harmful and foul smelling smell.
Haibowan district, Wuhai City the two supports street road reconstruction and extension project application mobility flyash mixture backfill inspection chamber walling crib amounts to 760, and backfill pipeline amounts to 16.3km, and this project application mobility flyash mixture backfill direct saving cost is calculated:
1) yuan/day yuan/day (the general population's expenses of labour)+3 yuan of water rate=173 yuan, (lease ramming machinery takes, and comprises fuel oil)+120, undisturbed soil backfill walling crib expense=50;
Yuan (water reducer+concrete and coal ash)=125.5 yuan, mobility flyash mixture backfill walling crib expense=120 yuan/day (the general population's expenses of labour)+3 yuan of water rate+2.5;
Undisturbed soil backfill walling crib expense-mobility flyash mixture backfill walling crib expense=173-125.5=47.5 unit;
2) (leasing 2 rammings machineries takes in required expense=50 of the every backfill pipeline of undisturbed soil bilateral 10m yuan of/day * 2, comprise fuel oil)+120 yuan/day/people * 2 (the general population's expenses of labour)+6 yuan of water rate=346 yuan, cost=346 of backfill 16.3km pipeline yuan * 16300/10=563980 unit;
Required expense=120 of the every backfill pipeline of mobility flyash mixture bilateral 10m yuan/day/yuan (water reducer+concrete and coal ash)=250 yuan, people * 2 (the general population's expenses of labour)+6 yuan of water rate+4, cost=250 of backfill 16.3km pipeline yuan * 16300/10=407500 unit;
Undisturbed soil backfill pipeline fee use-mobility flyash mixture backfill pipeline fee use=563980-407500=156480 unit;
Save priming cost expense: 47.5 yuan * 760+156480 yuan=192580 yuan
Also can save in addition 20000 yuan of environmental practice expenses.
Mobility flyash backfill walling crib, backfill piping installation need not be tamped, and can directly build moulding, also can carry on construction work at night, and this project completes 30 days in advance, within 30 days, save approximately 300000 yuan of all spendings.
The present invention is by being used for this projects by mobility flyash mixture backfill walling crib, backfill pipeline, and saving engineering cost is 192580+20000+300000=512580 unit.
Adopt the backfill of mobility flyash, can well stop the construction quality common fault of Bridge-Culvert Platform Back backfill, pipeline backfill, inspection chamber backfill, the associated cost of avoiding later period maintenance to bring, and the consistent favorable comment of owner and supervisor has been won in application of the present invention.
Application example: national highway 110 line Haibowans are to Chinese ephedra ditch section highway reconstruction and expansion engineering the second contract section;
Project profile: this engineering is born national highway 110 line Haibowans has 3, bridge, culvert 29 roads to Chinese ephedra ditch section road improvenment wire LK0+000～LK12+000; This project is Class I highway.
Effect: in national highway 110 line Haibowans to Chinese ephedra section road improvenment the second contract section construction of bridge and culvert; adopt the mobility flyash mixture backfill station back of the body; the diseases such as the bumping at bridge-head in the past causing due to sedimentation are avoided; the economic benefit that the present invention is applied to the generation of this engineering is 116.3 ten thousand yuan; and construction quality is good, economize on resources; protection of the environment, meets national policy requirement, and achievement is remarkable.
The intercity rapid passage engineering in Haibowan, Wuhai City to Hainan District
Project profile: intercity to Hainan District, Haibowan district, Wuhai City rapid passage engineering is positioned at Haibowan district, Wuhai City, this project beginning and end pile No. K1O+000～K22+843.437, the long 12.843km of road, Class I highway, this project has 8, bridge, slab culvert 2 roads, pipe culvert 25 roads.
Effect: during intercity rapid passage engineering bridges and culverts back filling behind abutment is constructed between Haibowan, Wuhai City to Hainan District, adopt mobility flyash mixture backfill construction, the present invention makes the cost-saving expense of this project amount to 214.8 ten thousand yuan, and construction quality is good, economize on resources, good economic benefit and social benefit are obtained.
The two supports street road, Haibowan district, Wuhai City reconstruction and extension project:
Project profile: this project is born the two supports street road, Haibowan district, Wuhai City reconstruction and extension project and is positioned at the north, city, Haibowan, Wuhai City, it is the important tie in the eastern loop of contact and alameda main road, 4007.5 meters of road total lengths, project content comprises road engineering, domestic water pipeline engineering, greening feedwater piping engineering, sanitary sewers engineering, rainwater engineering and road affiliated facility engineering.
Effect: in pipeline backfill, the inspection chamber stemming operation of the two supports street road, Haibowan district, Wuhai City reconstruction and extension project project are constructed, adopt the backfill of mobility flyash mixture, the economic benefit that the present invention produces in this project is 51.3 ten thousand yuan, and construction quality is good, economize on resources, meet national policy requirement, achievement is remarkable.
Construction North Road, Haibowan district, Wuhai City municipal administration infrastructure construction engineering
Project profile: this project is born Construction North Road, Haibowan district, Wuhai City municipal administration infrastructure construction engineering and is positioned at the northwestward, city, Haibowan, Wuhai City, it is the important tie in contact extra large North Street, the two supports street and alameda main road, 4786.2 meters of road total lengths, project content comprises road engineering, domestic water engineering, greening water supply engineering, sanitary sewage engineering, rainwater engineering and road affiliated facility engineering.
Effect: in pipeline backfill, the inspection chamber stemming operation of Construction North Road, Haibowan district, Wuhai City municipal administration infrastructure construction engineering project are constructed; adopt the backfill of mobility flyash mixture; the economic benefit that the present invention produces in this project is 61.4 ten thousand yuan; and construction quality is good, economize on resources; protection of the environment, keep ecological balance; meet national policy requirement, achievement is remarkable.
Backfill for inspection chamber and tube circumference sedimentation that the embodiment of the present invention provides and preparation method thereof, this backfill is made up of cement 0.5%, water reducer 0.005%, flyash 20%, undisturbed soil 79.45%, when on-the-spot preparation, every eight spade undisturbed soils are admixed five spade flyash, flyash mixed and the spade cement of every 40 spades, manually dose the mixed ratio example of water reducer for 1% of cement consumption, manually by undisturbed soil, flyash, cement and water reducer uniform mixing; While adopting this backfill backfill inspection chamber and tube circumference sedimentation, construction technology is simple, cost is lower, and every test index all meets design specifications requirement, and the utilization of flyash has simultaneously reduced the pollution to environment, save starting material, save the expense of heat power plant for storing fly ash, when reducing construction cost, reduced Tu Chang expropriation of land, alleviated the difficulty of land used anxiety, economic benefit and social benefit are remarkable, have wide application and promotion prospect.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the backfill for inspection chamber and tube circumference sedimentation, it is characterized in that, this backfill that is used for inspection chamber and tube circumference sedimentation is to be made up of the raw material of following ratio of weight and number: cement 0.5%, the efficient early strong naphthalene water reducer 0.005% of DH-4003, flyash 20%, undisturbed soil 79.45%.
2. the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 1, is characterized in that, this mixed ratio example design degree of mobilization that is used for the backfill of inspection chamber and tube circumference sedimentation is 148mm～168mm.
3. the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 1, is characterized in that, silicon-dioxide SiO in flyash
2, aluminium sesquioxide Al
2o
3and ferric oxide Fe
2o
3total content >70%, loss on ignition <0.75%, 0.3mm sieve aperture is by percentage >90%, 0.075mm sieve aperture is by percentage>=81%, water ratio <35%; Loss on ignition is not more than 0.75%, the granule content 81% that particle diameter is less than 0.074 millimeter, and optimum moisture content is 27.6%, Maximum dry density is 1.15g/cm
3.
4. the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 1, is characterized in that, cement selection P.C32.5 complex cement.
5. the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 1, is characterized in that, before undisturbed soil uses, fragment, stone and the hard clod that is greater than 10cm will be picked, and undisturbed soil must not adopt peat and the assorted soil of planting simultaneously.
6. the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 1, is characterized in that, this is used for the backfill backfill inspection chamber of inspection chamber and tube circumference sedimentation and the method for tube circumference sedimentation is:
Around walling crib, pipeline or the bridges and culverts of labor cleaning's backfill, inspection chamber and tube circumference are wanted backfill simultaneously, and the discrepancy in elevation is no more than 25cm;
Do bearing capacity of foundation soil or undisturbed soil ground bearing strength test at excavation inspection chamber and tube circumference sedimentation periphery, in the time that bearing capacity of foundation soil meets design requirements, can carry out backfill;
Backfill answers layering to carry out, and every 25cm is thick is one deck, after backfill, vibrates evenly with vibrating head, closely knit without after bubble, then carries out lower floor's backfill;
After backfill, wipe one's face, flatten processing by workman, after final set, carry out health.
7. the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 6, is characterized in that, in the time that bearing capacity of foundation soil is undesirable, should carry out ground processing, until bearing capacity of foundation soil carries out backfill again after meeting the requirements;
Health length of time is 7 days, and health is to after date, and detected intensity, carries out finished product examination after intensity is qualified.
8. for a preparation method for the backfill of inspection chamber and tube circumference sedimentation, it is characterized in that, this preparation method who is used for the backfill of inspection chamber and tube circumference sedimentation comprises the following steps:
Step 1, every eight spade undisturbed soils are admixed five spade flyash, the flyash mixed and spade cement of every 40 spades, the mixed ratio example of manually dosing water reducer is cement consumption 1%;
Step 2, manually by undisturbed soil, flyash, cement and water reducer uniform mixing.
9. the preparation method of the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 8, it is characterized in that, cross wet flyash and should carry out air-dry processing, the flyash of overdrying should be before mixing and stirring 2～3d shelving of sprinkling water, water content is adjusted to higher than optimum moisture content scope 5%～10%, and when construction, water content should be higher than optimum moisture content 3%～5%.
10. the preparation method of the backfill for inspection chamber and tube circumference sedimentation as claimed in claim 8, it is characterized in that, manually mix timing, need first coordinate platform scale to try to join with spade and bucket, determine the incorporation of each starting material and water content with the experience of repeatedly trying to join, then adopt spade and bucket directly manually to mix and stir, mix and stir and want evenly, to meet the requirement of design degree of mobilization.
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| CN201410095635.4A CN103864371A (en) | 2014-03-17 | 2014-03-17 | Backfill for checking peripheral settlement of wells and pipelines and preparation method of backfill |
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| CN201410095635.4A CN103864371A (en) | 2014-03-17 | 2014-03-17 | Backfill for checking peripheral settlement of wells and pipelines and preparation method of backfill |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107902974A (en) * | 2017-12-13 | 2018-04-13 | 中航天建设工程有限公司 | A kind of high intensity compresses prefabricated section backfilling process |
| CN108863194A (en) * | 2018-08-14 | 2018-11-23 | 中国十七冶集团有限公司 | A kind of backfilling materials behind abutments liquid cinder and its construction method |
| CN109750676A (en) * | 2019-01-29 | 2019-05-14 | 中煤地建设工程有限公司 | Foundation pit backfill construction method |
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| CN101857409A (en) * | 2010-05-28 | 2010-10-13 | 北京工业大学 | A fluidized backfill and its preparation and construction method |
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| CN101857409A (en) * | 2010-05-28 | 2010-10-13 | 北京工业大学 | A fluidized backfill and its preparation and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107902974A (en) * | 2017-12-13 | 2018-04-13 | 中航天建设工程有限公司 | A kind of high intensity compresses prefabricated section backfilling process |
| CN108863194A (en) * | 2018-08-14 | 2018-11-23 | 中国十七冶集团有限公司 | A kind of backfilling materials behind abutments liquid cinder and its construction method |
| CN109750676A (en) * | 2019-01-29 | 2019-05-14 | 中煤地建设工程有限公司 | Foundation pit backfill construction method |
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