CN1067086A - Two-lime-sand pile for reinforcing soft foundation and manufacturing method thereof - Google Patents
Two-lime-sand pile for reinforcing soft foundation and manufacturing method thereof Download PDFInfo
- Publication number
- CN1067086A CN1067086A CN 92106477 CN92106477A CN1067086A CN 1067086 A CN1067086 A CN 1067086A CN 92106477 CN92106477 CN 92106477 CN 92106477 A CN92106477 A CN 92106477A CN 1067086 A CN1067086 A CN 1067086A
- Authority
- CN
- China
- Prior art keywords
- sand
- quicklime
- flyash
- foundation
- pile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004576 sand Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 230000003014 reinforcing effect Effects 0.000 title description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000000292 calcium oxide Substances 0.000 claims abstract description 35
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 24
- 239000010881 fly ash Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 49
- 238000005728 strengthening Methods 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000011802 pulverized particle Substances 0.000 claims description 4
- 239000011800 void material Substances 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 12
- 239000004927 clay Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 208000009146 rhinoscleroma Diseases 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a method for building pile by pressing adhesive into soil on site, which is characterized in that quicklime, sand and fly ash are mixed according to the proportion of water content of foundation soil layer, are uniformly mixed, are filled into pile holes, are vibrated while filling to reach the designed elevation, and are finally capped by soil. The pile body of the reinforced composite foundation has no soft core, good integrity and high strength, the bearing capacity of the reinforced composite foundation is 2-3 times that of the original foundation, the deformation modulus of the reinforced composite foundation is 2-4 times that of the original foundation, the water content is reduced by 10-40%, and the void ratio is reduced by 11-20%.
Description
The method that the present invention relates to be pressed at the scene bonding agent in soil is built stake.
Early fifties, begin to use the quicklime pile strengthening soft foundation, this technology mainly is to utilize the imbibition effect ground compaction of quicklime, and the water content of ground is reduced, and void ratio reduces, thereby improve the intensity of ground, but because quicklime suction back age lime is the ointment state, can not get scleroma in decades, form soft heart, thereby influenced the quality of lime pile, be an impediment to the raising of bearing capacity of foundation soil.In order to overcome the soft heart problem, nineteen fifty-nine, Beijing research institute of building materials quicklime that ground has carried out added sand pile test, admixture sand in quicklime pile, fill the space of quicklime with sand, thereby improved the compactness of material of body of a pile, solved the soft heart problem, but because the hard reaction of coagulating can not take place between sand and the emplaster, can only be formed with the sand pile of emplaster filling perforation, its intensity still is not greatly improved, and pile body does not have globality; 1981, Jiangsu Province adopts quicklime to add pulverized-coal-ash pile, owing to contain more silica in the flyash, alumina and iron oxide isoreactivity composition, calcium ion generation chemical reaction in they and the emplaster, generation has the hydrated calcium silicate of the hydraulicity, drated calcium aluminate and hydrated calcium ferrite, formation has the pile body of certain degree of hardness and globality, solved the soft heart problem, but because quicklime adds and does not have aggregate in the pulverized-coal-ash pile, pile strength is at 40-50KPa, and is still on the low side, also because the severe of flyash is little, not only weakened compacted effect during the large percentage of admixture, and blanking brings difficulty to immersed tube to inter-pile soil.
The objective of the invention is to propose had not a kind ofly not only had soft heart, but also can significantly improve two grey sand pile and manufacture methods thereof of the strengthening soft foundation of pile strength and globality.
This two grey sand piles, the weight proportion that comprises quicklime, sand and flyash, three are the water content when the ground soil layer
〉=20% o'clock, quicklime: sand: flyash=2.8-3.2,1.0: 1.0,
In the scope of 12-20%, quicklime: sand: flyash=1.2-1.4: 1.0: 1.0
≤ 12% o'clock, quicklime: sand: flyash=0.48-0.52: 1.0: 1.0.
In order to improve the consolidation effect of soft foundation, during chosen material, it is the medium coarse sand of 0.25-0.50mm that the total content of preferably selecting for use calcium oxide content to be higher than 60% quicklime, silica and alumina is higher than 70% flyash, particle diameter.
Because this two grey sand piles are by quicklime, sand and flyash constitute, behind the moisture in the quicklime absorption ground, generate calcium hydroxide, volume expansion, ground compaction, water content in the ground is reduced, air space ratio reduces, active component silica in the flyash, alumina and iron oxide with the calcium hydroxide generation ion exchange that is partially soluble in water, generate hydrated calcium silicate, drated calcium aluminate and hydrated calcium ferrite, these three kinds of hydraulicity compounds with as the sand gluing of aggregate together, the pile body that forms had not both had soft heart, had significantly improved intensity and globality again, and bearing capacity of pile can reach 730MPa; With the composite foundation after this two grey sand piles reinforcings, bearing capacity is 2-3 a times of former ground, and modulus of deformation is 2-4 a times of former ground, and the water content of ground reduces 10-40%, and void ratio reduces 11-20%.Therefore, with this two grey sand pile strengthening soft foundations, have that cost is low, practical, a steady quality, characteristics that consolidation effect is good, its cost has only 1/3rd of concrete pile.
The manufacture method of two grey sand piles of strengthening soft foundation:
A, choose quicklime, sand and flyash, and quicklime is pulverized particle diameter be less than 20%, then less than 30mm, powder
B, mix, mix thoroughly, again by the desired proportioning of foundation soil water content
C, be filled in the hole, and vibrate in filler limit, limit, up to design elevation, last
D, push up with grave.
Detailed content with two grey sand pile strengthening soft foundations illustrates in conjunction with the embodiments.
Example 1
One power supply building, eleventh floor, building area 6020m
2High 52.80m, frame structure, box foundation, the main compression layer of ground constitutes by the high powder soil horizon that touches quick property of two silt clay layers and two is alternate, from top to bottom, the first silt clay layer water content 44.9%, void ratio 0.788, modulus of deformation 2.82MPa, the first powder soil horizon water content 16.7%, void ratio 0.678, modulus of deformation 11.26MPa, the second silt clay layer water content 22.7%, void ratio 0.720, modulus of deformation 4.3MPa, the second powder soil horizon water content 11.9%, void ratio 0.626, modulus of deformation 10.38, adopt φ 400mm two grey sand pile consolidated subsoils, auger bore lays out pile by the grid of 1200mm * 1200mm, the long 4.72m of stake, the lower end penetrates hardpan, case area of base 18.4 * 29.5m
2, three row's fender posts are established on every limit outside the base plate.The pile body of all piles is selected the quicklime of calcium oxide content 72% for use, the flyash of dioxide-containing silica 55% and alumina content 20%, particle diameter is the medium coarse sand of 0.25-0.5mm, and quicklime pulverized particle diameter less than 30mm, powder is less than 20%, by weight according to quicklime: sand: flyash, second powder soil horizon is 0.48-0.52: 1.0: 1.0, first powder soil horizon is 1.2-1.4: 1.0: 1.0, all the other two soil layers are 2.8-3.0: 1.0: 1.0 proportioning is got the raw materials ready, and mix, mix thoroughly, be filled in the hole, vibrate in filler limit, limit, up to design elevation, the fullness coefficient that guarantees filler is not less than 1.2, bind with grey rammed earth at last, the thickness of dirt is 60cm.
After tested, bearing capacity of pile is 730MPa, and the bearing capacity of composite foundation sees Table 1, and the parameter of each soil layer of composite foundation sees Table 2.
Table 1
| Soil layer | Bearing capacity (KPa) | ||
| Before the reinforcing | After the reinforcing | Composite foundation | |
| The first silt clay layer | 95 | 120 | 280 |
| First powder soil horizon | 160 | 190 | 340 |
| The second silt clay layer | 110 | 130 | 290 |
| Second powder soil horizon | 200 | 300 | 440 |
Table 2
| Soil layer | Water content (%) | Void ratio | Modulus of deformation (MPa) | |||
| Before the reinforcing | After the reinforcing | Before the reinforcing | After the reinforcing | Before the reinforcing | After the reinforcing | |
| The first silt clay layer | 44.9 | 39.9 | 0.788 | 0.701 | 2.82 | 4.30 |
| First powder soil horizon | 16.7 | 13.4 | 0.678 | 0.553 | 11.26 | 11.69 |
| The second silt clay layer | 22.7 | 18.85 | 0.720 | 0.578 | 4.30 | 7.70 |
| Second powder soil horizon | 11.9 | 12.0 | 0.626 | 0.524 | 10.38 | 10.80 |
Example 2
One dormitory building, long 60.37mm, wide 11.54m, high 15.70m, five layers of brick mix structure, strip foundation, ground are divided three layers, from top to bottom, first floor is a miscellaneous fill, water content 24.6%, air space ratio 0.791, modulus of deformation 5.42MPa, the second layer are silty clay, water content 22.9%, air space ratio 0.813, modulus of deformation 6.32MPa, the 3rd layer is clay, water content 24.1%, air space ratio 0.715, modulus of deformation 8.3MPa adopts φ 300mm two grey sand pile consolidated subsoils, vibration sinking tube machine pore-forming, arrange along the double positive triangle of strip foundation, pilespacing 1.0m, stake long 7m, totally 614 piles.It is the medium coarse sand of 0.25-0.50mm that the pile body of all piles is selected flyash, the particle diameter of quicklime, dioxide-containing silica 60% and the alumina content 26% of calcium oxide content 65% for use, and quicklime is pulverized particle diameter be less than 20% less than 30mm, powder, by weight according to quicklime: sand: flyash is 3.0-3.2: 1.0: 1.0 proportioning is got the raw materials ready, mixes, is mixed thoroughly, vibration pipe-drawing limit, limit filler, stop pulling out every 2m and stay 5 seconds of shaking, up to design elevation, the fullness coefficient that guarantees filler is not less than 1.2, with plain grave top, the thickness of plain soil is 80cm at last.
After tested, bearing capacity of pile is 732KPa, and the pile body deformation modulus is 62.3MPa, and the bearing capacity of ground is by the 261KPa that reinforces after preceding 84KPa brings up to reinforcing, and modulus of deformation is by the 21.9KPa that reinforces after preceding 5.42-8.3MPa brings up to reinforcing.
Claims (4)
1, two of a kind of strengthening soft foundation grey sand piles comprise quicklime, sand, it is characterized in that also comprising flyash, and three's weight proportion is the water content when the ground soil layer
〉=20% o'clock, quicklime: sand: flyash=2.8-3.2: 1.0: 1.0,
In the scope of 12-20%, quicklime: sand: flyash
=1.2-1.4∶1.0∶1.0，
≤ 12% o'clock, quicklime: sand: flyash=0.48-0.52: 1.0: 1.0.
2, according to two grey sand piles of the said strengthening soft foundation of claim 1, it is the medium coarse sand of 0.25-0.50mm that the total content that it is characterized in that selecting for use calcium oxide content to be higher than 60% quicklime, silica and alumina is higher than 70% flyash, particle diameter.
3, a kind of manufacture method of two grey sand piles of strengthening soft foundation is characterized in that
A, choose quicklime, sand and flyash, and quicklime is pulverized particle diameter be less than 20%, then less than 30mm, a grain end
B, mix, mix thoroughly, again by the desired proportioning of foundation soil water content
C, be filled in the hole, and filler limit, limit vibrates, fill up up to the stake hole, last
D, push up with grave.
4, according to the manufacture method of two grey sand piles of the described strengthening soft foundation of claim 3, it is characterized in that the fullness coefficient of filler is not less than 1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106477 CN1029864C (en) | 1992-04-17 | 1992-04-17 | Foundation treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106477 CN1029864C (en) | 1992-04-17 | 1992-04-17 | Foundation treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1067086A true CN1067086A (en) | 1992-12-16 |
| CN1029864C CN1029864C (en) | 1995-09-27 |
Family
ID=4942148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106477 Expired - Fee Related CN1029864C (en) | 1992-04-17 | 1992-04-17 | Foundation treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1029864C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035342C (en) * | 1993-02-05 | 1997-07-02 | 长治市建筑工程总公司地基处理公司 | Method and apparatus for making compacted pile |
| CN1037021C (en) * | 1994-03-16 | 1998-01-14 | 沙祥林 | Three-dimension high-strength composite foundation |
| CN102031780A (en) * | 2010-12-13 | 2011-04-27 | 广东省第二建筑工程公司 | Water flushing construction method of static tubular pile of sand pile tip |
| CN102817353A (en) * | 2012-08-03 | 2012-12-12 | 华侨大学 | Composite soft clay foundation |
| CN103306278A (en) * | 2013-05-31 | 2013-09-18 | 武汉广益交通科技股份有限公司 | Method for processing soft soil foundation with environment-friendly light pile |
| CN103787635A (en) * | 2014-01-26 | 2014-05-14 | 秦始皇帝陵博物院 | Inorganic earthen site anchor rod grouting material based on calcium oxide |
| CN104032777A (en) * | 2014-05-14 | 2014-09-10 | 中冶集团武汉勘察研究院有限公司 | Method for rectifying slant of buildings through geotechnical cloth bags combined with mini pile jacking |
| CN106082901A (en) * | 2016-06-13 | 2016-11-09 | 河南大学 | The green concrete prefabricated pile of a kind of strengthening soft foundation and construction method |
| CN106087957A (en) * | 2016-06-03 | 2016-11-09 | 浙江圣井电力安装工程有限公司 | Power distribution room cable duct anti-settling method is built on a kind of coastal sludge matter soil |
| CN106638575A (en) * | 2017-01-10 | 2017-05-10 | 邓亚光 | Reinforcing method of pile body |
| CN110424365A (en) * | 2019-06-21 | 2019-11-08 | 中机国能电力工程有限公司 | A method of acid soil is improved using fine coal lime-sand pile |
| CN114737558A (en) * | 2022-04-07 | 2022-07-12 | 南昌航空大学 | Soft soil shallow layer holding force hard shell layer construction method |
-
1992
- 1992-04-17 CN CN 92106477 patent/CN1029864C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035342C (en) * | 1993-02-05 | 1997-07-02 | 长治市建筑工程总公司地基处理公司 | Method and apparatus for making compacted pile |
| CN1037021C (en) * | 1994-03-16 | 1998-01-14 | 沙祥林 | Three-dimension high-strength composite foundation |
| CN102031780A (en) * | 2010-12-13 | 2011-04-27 | 广东省第二建筑工程公司 | Water flushing construction method of static tubular pile of sand pile tip |
| CN102817353A (en) * | 2012-08-03 | 2012-12-12 | 华侨大学 | Composite soft clay foundation |
| CN103306278A (en) * | 2013-05-31 | 2013-09-18 | 武汉广益交通科技股份有限公司 | Method for processing soft soil foundation with environment-friendly light pile |
| CN103787635B (en) * | 2014-01-26 | 2015-09-02 | 秦始皇帝陵博物院 | A kind of inorganic soil ruins anchor pole injection material based on calcium oxide |
| CN103787635A (en) * | 2014-01-26 | 2014-05-14 | 秦始皇帝陵博物院 | Inorganic earthen site anchor rod grouting material based on calcium oxide |
| CN104032777A (en) * | 2014-05-14 | 2014-09-10 | 中冶集团武汉勘察研究院有限公司 | Method for rectifying slant of buildings through geotechnical cloth bags combined with mini pile jacking |
| CN104032777B (en) * | 2014-05-14 | 2016-01-20 | 中冶集团武汉勘察研究院有限公司 | Geotechnique's cloth bag combined miniature stake lifting inclination-correcting builds/method of structure |
| CN106087957A (en) * | 2016-06-03 | 2016-11-09 | 浙江圣井电力安装工程有限公司 | Power distribution room cable duct anti-settling method is built on a kind of coastal sludge matter soil |
| CN106082901A (en) * | 2016-06-13 | 2016-11-09 | 河南大学 | The green concrete prefabricated pile of a kind of strengthening soft foundation and construction method |
| CN106082901B (en) * | 2016-06-13 | 2018-08-07 | 河南大学 | A kind of the green concrete prefabricated pile and construction method of strengthening soft foundation |
| CN106638575A (en) * | 2017-01-10 | 2017-05-10 | 邓亚光 | Reinforcing method of pile body |
| CN110424365A (en) * | 2019-06-21 | 2019-11-08 | 中机国能电力工程有限公司 | A method of acid soil is improved using fine coal lime-sand pile |
| CN114737558A (en) * | 2022-04-07 | 2022-07-12 | 南昌航空大学 | Soft soil shallow layer holding force hard shell layer construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1029864C (en) | 1995-09-27 |
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