CN105254223A - Compaction soil-cement-fly ash pile - Google Patents
Compaction soil-cement-fly ash pile Download PDFInfo
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- CN105254223A CN105254223A CN201510551013.2A CN201510551013A CN105254223A CN 105254223 A CN105254223 A CN 105254223A CN 201510551013 A CN201510551013 A CN 201510551013A CN 105254223 A CN105254223 A CN 105254223A
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- Prior art keywords
- cement
- soil
- stake
- flyash
- pile
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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
Abstract
The invention discloses a compaction soil-cement-fly ash pile which is used for a subgrade of a building and a road. The compaction soil-cement-fly ash pile comprises, in volume, cement 12.5%, fly ash 7.5% to 37.5% and soil 50% to 80%. The preparation method comprises: A, digging a pile hole; B, sieving the soil digging out during digging the pile hole, mixing the sieved soil, cement, fly ash and water proportionally; C, performing test compaction before full scale construction to determine the padding quantity of every ramming and the ramming intensity; and D, performing the pile body construction. The compaction soil-cement-fly ash pile adds a certain amount of fly ash in preparation process, so that the intensity and bearing capability of the soil pile are improved, the range of application of the fly ash is enlarged. Moreover, the compaction soil-cement-fly ash pile is clean and environmental friendly.
Description
Technical field
The present invention relates to a kind of native stake, especially add the native stake of cement, flyash, for building, the ground of road.
Background technology
Tamped Cement-soil Pile Composite Foundation Technology is foundation treatment technology comparatively conventional at present, main method is stirred by certain proportioning at earth material and cement, then back-filling in layers compacting in the hole of having constructed in advance, form the pile body with some strength, with surrounding soil shared upper load.
The rammed concrete pile intensity made due to cement and the compound of soil is lower, and range of application is less.The method adding reinforcing bar core in prior art in oriented native stake improves native stake intensity, but this method cost is higher, and manufacture difficulty is high, and actual using value is low; Another kind of mode adds the additives such as water glass in cement-earth, improve the intensity of pile body to a certain extent, but due to the kind of blast blending more, cost is also higher, importantly limited to the raising of rammed concrete pile intensity, strength of the mixing pile improves not obvious.
Summary of the invention
The technical problem to be solved in the present invention is to provide the stake of a kind of compacting cement, flyash soil, improves native stake intensity.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The stake of compacting cement, flyash soil, the component of material and volume percent be,
Cement: 12.5%, flyash: 7.5% ~ 37.5%, earth material: 50% ~ 80%.
Further improvement of the present invention is: the component of material and volume percent be,
Cement: 12.5%, flyash: 25% ~ 37.5%, earth material: 50% ~ 62.5%.
Further improvement of the present invention is: preparation method comprises the following steps:
A, dig stake holes, stake holes is tamped and removes the inner loosened soil of stake holes;
B, the earth material dug out when digging stake holes to be sieved, earth material, cement, flyash and water after sieve are proportionally mixed;
Carry out examination before C, formal construction to ram, rule of thumb making one or more test pile pile body, by detecting the compaction rate of pile body, determining often hit amount of filler and ram dynamics;
D, pile body are constructed, and ram amount of filler filler in hole of determining ram simultaneously by step C examination, filler frequency and to ram frequency coordination consistent, hocket, filler with pound rammer and hocket with identical speed, tamp pile continuously.
Further improvement of the present invention is: described earth material is silt or the cohesive soil that organic content is less than 5%.
Further improvement of the present invention is: the size of mesh of sieving described in step B is 20mm.
Further improvement of the present invention is: the amount adding water in step B is in the scope of optimum water content upper and lower 2%.
Further improvement of the present invention is: the optimum water content adding the amount of water in step B is the amount adding water rule of thumb obtained, and the scope of optimum water content is that the weight of water accounts for 18% ~ 20% of dry mix gross weight.
Further improvement of the present invention is: the compound added water in step C and step D is no more than 2 hours storage period.
Owing to adopting technique scheme, the beneficial effect that the present invention produces is:
Compacting cement, flyash soil of the present invention stake, adds a certain amount of flyash, improves the intensity of native stake, improve the supporting capacity of native stake in making processes; Add flyash, expand the range of application of flyash, clean environment firendly.
Compacting cement, flyash soil of the present invention stake, flyash can improve the intensity of native stake, and flyash is the main waste material in fuel-burning power plant, and output is high, and price is low, and powder application coal ash makes native stake enables flyash rationally process, energy-conserving and environment-protective.
In compacting cement, flyash soil stake making method of the present invention, before making native stake, first make test pile, because the earth material of different areas is different, best pile body lift height is different, the intensity of lift height test piles different by experiment, determines best lift height, ensures the intensity determining native stake the best.
In compacting cement, flyash soil stake making method of the present invention, filler hockets with identical speed with pounding to ram, and makes native stake tamping in layers, native stake various piece is evenly tamped, improves the total quality of native stake.
In compacting cement, flyash soil stake making method of the present invention, add the compound after water, be no more than 2 hours storage period, ensure that compound can not solidify, improve the quality making native stake, start to solidify more than 2 hours compounds, be unfavorable for the making of native stake.
Embodiment
Below the present invention is described in further details:
Common cement earth pile making method is stirred by certain proportioning at earth material and cement, then back-filling in layers compacting in the hole of having constructed in advance, form the pile body with some strength, with surrounding soil shared upper load, but the native stake intensity made due to cement and the compound of soil is lower, and work-ing life is short.
In the native stake process of making, add a certain amount of flyash, improve the intensity of native stake, improve the supporting capacity of native stake.
In " building foundation treatment technical specifications " (JGJ79-2012), regulation rammed concrete pile cement should get 1:5-1:8 with the nominal mix proportion of soil, in the making processes of compacting cement, flyash soil stake, adopt cement to be 1:7 with the nominal mix proportion of soil, keep the constancy of volume of cement, change flyash and native nominal mix proportion, get several different ratio and carry out Indoor Impaction Test, point length of time carries out test block pressure resistance intensity test.
Concrete testing sequence is as follows:
1, the soil sample that field is fetched is pulverized, cross 5mm sieve even, and measure the water content of soil sample, require to divide into groups according to different fly ash content according to testing program, calculate water and soil material, cement and the fine coal ash quantity often organizing sample and need add; Earth material after weighing and cement, flyash are fully mixed thoroughly at fluid-tight spice platform, then with atomizer, load weighted water stratification is evenly sprayed on mix surface, after having sprayed again by abundant for compound mix once, with covered rearing with plastic film, leave standstill 20-30 minute.
2, be evenly coated with skim lubricating oil hitting real die trial inwall, for ease of form removal, in die trial, paste one deck preservative film or transfer paper, getting the compound part added water pours in die trial, ram, divide four layers and hit reality, hit the cement, flyash soil face plane hair to every layer of intersection in fact.When hitting real completing, carefully flatten the top of sample with scraper, and use covered rearing with plastic film.
3, test block prepares the demoulding in latter 24 hours, send curing room immediately and use covered rearing with plastic film after the demoulding, in normal curing, and temperature 20 ± 2 DEG C; Humidity 100%, by test requirements document maintenance under condition.
Following intensity data test-results is obtained through above-mentioned 1 ~ 4 step,
And the intensity of not adding the native stake of flyash is as follows,
The native stake adding flyash as seen by two tables is above than the native stake strength enhancing 1.4 ~ 2.3 times not adding flyash.
The compacting cement, flyash soil stake being obtained making in Practical Project by test-results, the component of material and volume percent be,
Cement: 12.5%, flyash: 7.5% ~ 37.5%, earth material: 50% ~ 80%.
Component and the volume percent preferred version of material be,
Cement: 12.5%, flyash: 25% ~ 37.5%, earth material: 50% ~ 62.5%.
Cement, as solidifying agent, ensures the shaping of native stake; Earth material is silt or the cohesive soil that pollution-free, organic content is less than 5%; Flyash can improve the intensity of native stake, improves the supporting capacity of native stake.
Preparation method comprises the following steps:
A, dig stake holes, determine shape and the degree of depth of stake holes as required, dig stake holes and stake holes is tamped, remove the inner loosened soil of stake holes.
Whether B, to detect the earth material dug out when digging stake holes suitable, and earth material need meet pollution-free, organic content and be less than the silt of 5% or the condition of cohesive soil; If do not satisfied condition, choose earth material at elsewhere, if satisfy condition the earth material that the digs out raw material as pile body; Earth material is crossed the sieve that mesh diameter is 20mm, earth material, cement, flyash and water after sieve are proportionally admixed evenly, the optimum water content that amount of water presses compound controls, be ± 2% with optimum water content permissible variation, on-the-spot by " one hold agglomerating, one pinch namely fall apart " principle water content is differentiated; The earth material mixed was finished in 2 hours.
C, making test pile, get a part of compound to add water and mix, according to different lift heights with ram dynamics and make some test piles, measure the dry density of test pile pile body, detect the intensity of each test pile pile body, the test pile of selection intensity the best, using the lift height of the test pile of intensity the best and dynamics of ramming as lift height when making native stake with ram the parameter of dynamics.
D, make native stake, in pile body, filler carries out pounding rammer simultaneously, determines the amount of each filler according to the best lift height determined in step C, the best according to determining in step C rams dynamics, once pound rammer after each filler, filler hockets with identical speed with pounding to ram, often
Pile will tamp pile continuously, must not interrupt, and fills out fail to fill in phenomenon to prevent pine.
Embodiment 1
The stake of compacting cement, flyash soil, the component of material and volume percent be,
Cement: 12.5%, flyash: 7.5%, earth material: 80%.
Make native stake according to steps A to step B, meet the requirement of intensity in engineering.
Embodiment 2
The stake of compacting cement, flyash soil, the component of material and volume percent be,
Cement: 12.5%, flyash: 12.5%, earth material: 75%.
Make native stake according to steps A to step B, meet the requirement of intensity in engineering.
Embodiment 3
The stake of compacting cement, flyash soil, the component of material and volume percent be,
Cement: 12.5%, flyash: 25%, earth material: 62.5%.
Make native stake according to steps A to step B, meet the requirement of intensity in engineering.
Embodiment 4
The stake of compacting cement, flyash soil, the component of material and volume percent be,
Cement: 12.5%, flyash: 37.5%, earth material: 50%.
Make native stake according to steps A to step B, meet the requirement of intensity in engineering.
Compacting cement, flyash soil of the present invention stake, adds a certain amount of flyash, improves the intensity of native stake, improve the supporting capacity of native stake in making processes; Add flyash, expand the range of application of flyash, clean environment firendly.
Claims (8)
1. tamp the stake of cement, flyash soil, it is characterized in that: the component of material and volume percent be,
Cement: 12.5%, flyash: 7.5% ~ 37.5%, earth material: 50% ~ 80%.
2. compacting cement, flyash according to claim 1 soil stake, is characterized in that: the component of material and volume percent be,
Cement: 12.5%, flyash: 25% ~ 37.5%, earth material: 50% ~ 62.5%.
3. compacting cement, flyash soil according to claim 1 and 2 stake, is characterized in that: preparation method comprises the following steps:
A, dig stake holes, stake holes is tamped and removes the inner loosened soil of stake holes;
B, the earth material dug out when digging stake holes to be sieved, earth material, cement, flyash and water after sieve are proportionally mixed;
Carry out examination before C, formal construction to ram, rule of thumb making one or more test pile pile body, by detecting the compaction rate of pile body, determining often hit amount of filler and ram dynamics;
D, pile body are constructed, and ram amount of filler filler in hole of determining ram simultaneously by step C examination, filler frequency and to ram frequency coordination consistent, hocket, filler with pound rammer and hocket with identical speed, tamp pile continuously.
4. compacting cement, flyash soil according to claim 3 stake, is characterized in that: described earth material is silt or the cohesive soil that organic content is less than 5%.
5. compacting cement, flyash soil according to claim 3 stake, is characterized in that: the size of mesh of sieving described in step B is 20mm.
6. compacting cement, flyash soil according to claim 3 stake, is characterized in that: the amount adding water in step B is in the scope of optimum water content upper and lower 2%.
7. compacting cement, flyash soil according to claim 6 stake, it is characterized in that: the optimum water content adding the amount of water in step B is the amount adding water rule of thumb obtained, the scope of optimum water content is that the weight of water accounts for 18% ~ 20% of dry mix gross weight.
8. compacting cement, flyash according to claim 3 soil stake, is characterized in that: the compound added water in step C and step D is no more than 2 hours storage period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510551013.2A CN105254223A (en) | 2015-09-01 | 2015-09-01 | Compaction soil-cement-fly ash pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510551013.2A CN105254223A (en) | 2015-09-01 | 2015-09-01 | Compaction soil-cement-fly ash pile |
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| CN105254223A true CN105254223A (en) | 2016-01-20 |
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| CN201510551013.2A Pending CN105254223A (en) | 2015-09-01 | 2015-09-01 | Compaction soil-cement-fly ash pile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638575A (en) * | 2017-01-10 | 2017-05-10 | 邓亚光 | Reinforcing method of pile body |
| CN106906709A (en) * | 2017-03-27 | 2017-06-30 | 石家庄铁道大学 | A kind of construction method of the modified cement earth pile of quick lime |
Citations (5)
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|---|---|---|---|---|
| JP2001207439A (en) * | 2000-01-24 | 2001-08-03 | Kokudo Sogo Kensetsu Kk | Soil impoving method |
| EP1600560A1 (en) * | 2004-05-28 | 2005-11-30 | Smet F & C | A method and device for forming a pile |
| CN1718939A (en) * | 2005-07-07 | 2006-01-11 | 何世鸣 | New type cement soil pile and its construction method |
| CN101349060A (en) * | 2008-08-29 | 2009-01-21 | 中冶集团武勘岩土基础工程公司 | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method |
| CN101899828A (en) * | 2010-04-27 | 2010-12-01 | 河海大学 | Construction method of bagged rammed small-diameter soil-cement pile composite foundation |
-
2015
- 2015-09-01 CN CN201510551013.2A patent/CN105254223A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001207439A (en) * | 2000-01-24 | 2001-08-03 | Kokudo Sogo Kensetsu Kk | Soil impoving method |
| EP1600560A1 (en) * | 2004-05-28 | 2005-11-30 | Smet F & C | A method and device for forming a pile |
| CN1718939A (en) * | 2005-07-07 | 2006-01-11 | 何世鸣 | New type cement soil pile and its construction method |
| CN101349060A (en) * | 2008-08-29 | 2009-01-21 | 中冶集团武勘岩土基础工程公司 | Technique for reinforcing organic matter soft soil by concrete and coal ash secondary stirring powder spraying method |
| CN101899828A (en) * | 2010-04-27 | 2010-12-01 | 河海大学 | Construction method of bagged rammed small-diameter soil-cement pile composite foundation |
Non-Patent Citations (1)
| Title |
|---|
| 杨绍平 等: "《地基处理技术》", 30 June 2015, 中国水利水电出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638575A (en) * | 2017-01-10 | 2017-05-10 | 邓亚光 | Reinforcing method of pile body |
| CN106906709A (en) * | 2017-03-27 | 2017-06-30 | 石家庄铁道大学 | A kind of construction method of the modified cement earth pile of quick lime |
| CN106906709B (en) * | 2017-03-27 | 2020-02-14 | 石家庄铁道大学 | Construction method of quicklime modified cement soil pile |
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Application publication date: 20160120 |
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