CN1243183A - Construction method of vibration punching slurry-bitstone pile and apparatus used thereof - Google Patents
Construction method of vibration punching slurry-bitstone pile and apparatus used thereof Download PDFInfo
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- CN1243183A CN1243183A CN 99109216 CN99109216A CN1243183A CN 1243183 A CN1243183 A CN 1243183A CN 99109216 CN99109216 CN 99109216 CN 99109216 A CN99109216 A CN 99109216A CN 1243183 A CN1243183 A CN 1243183A
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Abstract
The construction method of vibro-replacement grouted stone pile includes the following steps: (1) according to the conventional vibro-replacement construction method, densifying (with broken stone) up to 3-5 meters apart from pile head and inserting the mortar jet pipe, (2) continuously densifying up to pile head; (3) using high-pressure grouting pump for grouting cement mortar through the mortar jet pipe;(4) taking out the mortar jet pipe so as to implement said vibro-replacement grouted stone pile construction process. Its equipment includes vibroflot, cement mortar mixer, high-pressure grouting pump and mortar jet pipe. The said mortar pipe is closed in its one end, and pipe wall is annularly equipped with mortar-jet holes from top to bottom. The pile made up by said method is high in strength, its process is simple, and its cost is low.
Description
The present invention relates to a kind of vibration punching slurry The Macadam Pile Construction method and used equipment.
Vibro replacement stone column is typical composite foundation, can give full play to the bearing capacity of inter-pile soil.Because broken stone pile is the granular pile of incoherence, its bearing capacity depends on the restraint forces of inter-pile soil to a great extent, low at soft clay foundation owing to bury intensity, the intensity of broken stone pile is also relatively low, ordinary circumstance composite foundation intensity can reach about a times (about 200-300KPa) of original soil, improve again and do not have a rationality of technique and economy, existing market 20-30 storey building thing is many, require bearing capacity of foundation soil to reach 300-400KPa, in order to adapt to market demand, be badly in need of producing a kind of novel stake type, can eliminate foundation liquefaction again can bigger raising bearing capacity of foundation soil.
The purpose of this invention is to provide a kind of vibration punching slurry The Macadam Pile Construction method and used equipment.Vibration punching slurry The Macadam Pile Construction method of the present invention is on vibro replacement stone column technology basis, develops the strength of the mixing pile height, technology is simple, reduces construction costs, is suitable for the new stake type of the wider needs in market.In the inventive method employed Grout-jetting pipe simple in structure, be applicable to and in pile body, inject cement paste, and simple to operate.
For achieving the above object, the present invention takes following design scheme: this vibration punching slurry The Macadam Pile Construction method comprises that the vibroflotation construction method is made vibro replacement stone column in ground routinely, and this method also comprises the steps:
(1) in above-mentioned conventional vibroflotation construction method, the segmentation filler is encrypted when pile crown 3-5 rice position from bottom to top, and Grout-jetting pipe is inserted this position along the side of the punching of shaking;
(2) continue to this position filler vibroflotation compaction to pile crown;
(3) with the high pressure grouting pump Grout-jetting pipe is injected in the pressurization of the cement paste in the mixer, make in cement paste this position in pile body and spread, the amount of pouring at this position is every cubic metre and pours into cement paste 130-150 litre;
(4) take out Grout-jetting pipe and promptly finish this vibration punching slurry The Macadam Pile Construction process.
According to the principle and the field trial of soil mechanics, adopt the made broken stone pile of conventional vibroflotation construction method be subjected to behind the load under base surface the degree of depth approximately a stake footpath 2-4 doubly to locate distortion maximum, be to produce the main position that broken stone pile is destroyed.Therefore the broken stone pile intensity with this position improves the intensity that can effectively improve ground, and reduces deflection.Directly about 1.0m, therefore reinforcing under the substrate is that the degree of depth will obtain the good technical economic benefit for the 3-5m broken stone pile under the stake top in the stake of general broken stone pile.Utilize this principle not all in the long scope of stake consolidated subsoil be supported with proofs, this has the remarkable economical effect to saving construction investment.
Through experimental study, adopt in the pile body of the made broken stone pile of conventional vibroflotation construction method and form by crushed stone aggregate and charges mud thereof, if the mud of filling is pressed into cement paste, improve the intensity of charges, and and rubble form certain coagulability, just can increase substantially the intensity of broken stone pile pile body, composite foundation intensity be reached satisfy the top-out load requirement.Its method is behind the vibro replacement stone column pile, 3-5 rice scope internal pressure pours into cement paste under the stake top, the cement paste of the mud in the rubble pile body and certain allocation ratio is mixed, form cement and native curing, increased the adhesion stress of rubble skeleton contact point simultaneously.The physics of this process, chemical reaction have 4 points:
1, the hydration reaction of cement;
2, ion-exchange and granuleization reaction;
3, hard coagulating reacted;
4, carbonation reaction.
The hydration reaction of cement has absorbed the moisture content of mud, has improved adhesion stress between the cement-soil particle; Ion-exchange and granulating effect can form the cement soil body and rubble constitutes firmer association; Hard coagulating reacted the intensity and the water stability that can increase cement-soil, and strength of the mixing pile does not reduce yet when meeting the underground water rising, and carbonation reaction can improve soil cement intensity and improve adhesion stress between the rubble skeleton.
The vibration punching slurry broken stone pile is compared with vibro replacement stone column, the vibration punching slurry broken stone pile only under the stake top of former vibro replacement stone column 3-5 rice be pressed into a certain proportion of cement paste.Under the identical like this permutizer condition, the vibration punching slurry broken stone pile can improve 20-50% than vibro-replacement stone pile composite foundation standard value of bearing capacity, and construction investment does not increase.Its reason has been cancelled vibro replacement stone column and should have been given on the consolidation process surface and stay the 1.0-1.5m unsettled pile crown of close effect that shakes.The cement operation expense that increases and the close section appropriate litigation fees that shake of minimizing.
The vibration punching slurry broken stone pile is than the vibro replacement stone column 30-40% that reduces investment outlay, and it is about more than 50% to reduce investment outlay than cast-in-place concrete pile, and it is about more than 70% to reduce investment outlay than precast reinforced concrete pile.Therefore have better economic benefit and reach using value widely.
In the job practices of the present invention, with the step of high pressure grouting pump with the pressurization of the cement paste in mixer injection Grout-jetting pipe, the water in the employed cement paste is 0.4-0.6 with the ratio of cement: 1 described.
In the employed equipment of job practices of the present invention, this equipment includes vibrating impacter, cement mixer, high pressure grouting pump, this high pressure grouting delivery side of pump and connects Grout-jetting pipe by high-pressure rubber pipe, the link of this Grout-jetting pipe is an opening, the other end is for sealing, and ring is established several and is penetrated the slurry hole on the tube wall of this Grout-jetting pipe, and hole count distribute from sealing end from down and on reduce gradually.
The employed equipment of job practices of the present invention: vibrating impacter, cement mixer, high pressure grouting pump all are conventional equipments, but in order to be in the milk in pile body, have designed special equipment one Grout-jetting pipe.
In the employed equipment of job practices of the present invention, described Grout-jetting pipe is 1 " steel pipe, long is 3-5 rice.
In the employed equipment of job practices of the present invention, penetrating on the described Grout-jetting pipe starched the hole from 5 centimeters of sealing ends, and lines up 4 rows by 10 centimeters spacings, and every row's hole count is respectively 8,6,4,2 from bottom to top, and the slurry hole of penetrating on every row evenly distributes, and the described diameter of penetrating the slurry hole is 8mm.
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram of vibration punching slurry The Macadam Pile Construction method
Fig. 2 is the connection layout of high pressure grouting pump and Grout-jetting pipe
Fig. 3 is the schematic diagram of Grout-jetting pipe
Embodiment.The vibration punching slurry broken stone pile in 1.2 meters in dark 10 meter, the footpaths of stake is made in construction on clay foundation.Adopt vibrating impacter that pore-creating is carried out in position, good hole, utilize the vibrating impacter deadweight slowly to descend during pore-creating, reach the design hole depth and can stop pore-creating.Pore-creating finishes behind clear hole, and vibrating impacter rests on vibrations half a minute at the bottom of the hole, can be from the aperture around in the hole filler.Filler can adopt two kinds of ballast and sandy gravels in the hole, and ballast and gravel particle diameter are no more than 15 centimetres.The segmentation filler that makes progress at the bottom of the hole, and encrypt with the vibrating impacter contiguous segmentation, every section encryption all should reach the encryption electric current of the motor of vibrating impacter. thereuponWhen segmentation is from bottom to top encrypted from 4 meters positions of pile crown, Grout-jetting pipe is inserted this position along the side of the punching of shaking, be the Grout-jetting pipe 1 residing position among Fig. 1, for the ease of take out Grout-jetting pipe 1 after grouting, the length of Grout-jetting pipe 1 is greater than or equal to the degree of depth at this position.Continue in the punching of shaking the filler vibroflotation compaction then to pile crown, as shown in Figure 1, with the high pressure grouting pump pressurization of the cement paste in the mixer is injected Grout-jetting pipe 1 by high-pressure rubber pipe 2 again, make in cement paste this position in pile body 3 and spread, the amount of pouring at this position is every cubic metre and pours into cement paste 130-150 litre.Water in the employed cement paste is 0.4: 1 with the ratio of cement, irritated cement paste after, take out Grout-jetting pipe 1, promptly finish whole vibration punching slurry The Macadam Pile Construction process.
In the employed equipment of job practices of the present invention, include vibrating impacter, be common apparatus, be that motor and eccentric rotor are formed, rotate the generation horizontal vibration by the driven by motor eccentric rotor, this vibrating impacter center has water channel, wholely shakes that to break through journey be to be finished jointly by the downward impact force that water channel produces by vibrating impacter horizontal vibration and water under high pressure.Employed cement mixer is 1.5m
3Horizontal one (standard type) stirs into cement paste by cement mixer with water and cement.Employed high pressure grouting pump is 200/40 high pressure piston reciprocating type (standard type), and the slurries that cement mixer forms are squeezed into Grout-jetting pipe 1 by high-pressure rubber pipe 2.As shown in Figure 2, high pressure grouting pump 4 is to adopt motor to promote the mode of piston by the belt drive unit drivening rod, the slurries that enter from import 5 are come out from exporting 6 pressurizations by piston again, and high pressure is squeezed in the Grout-jetting pipe 1, passes through high-pressure rubber pipe 2 in the outlet 6 of high pressure grouting pump 4 and connects Grout-jetting pipes 1.High-pressure rubber pipe is 1 " high-pressure rubber pipe.As shown in Figure 3, Grout-jetting pipe 1 is 1 of long 3-5 rice " steel pipe, its length is to decide according to the mud jacking degree of depth, and the link of this Grout-jetting pipe 1 is an openend, and the other end is that the bottom also is sealing end, promptly should end iron plate solder up.Make progress for 5 centimeters from sealing end, beat with Φ 8mm drill bit and penetrate slurry hole 7, penetrate slurry hole 7 and line up 4 rows by 10 centimeters spacings, every row's hole count is respectively 8,6,4,2 from bottom to top, and the slurry hole 7 penetrated on every row evenly distributes.
Device structure used in the present invention is simple, easy to operate, pollution-free, cost is low, particularly adopts Grout-jetting pipe, can make pile body mud jacking distribution uniform, improves the intensity of pile body.
Claims (5)
1, a kind of vibration punching slurry The Macadam Pile Construction method, this method comprises that the vibroflotation construction method is made vibro replacement stone column in ground routinely, it is characterized in that: this method also comprises the steps:
(1) in above-mentioned conventional vibroflotation construction method, the segmentation filler is encrypted when pile crown 3-5 rice position from bottom to top, and Grout-jetting pipe is inserted this position along the side of the punching of shaking;
(2) continue to this position filler vibroflotation compaction to pile crown;
(3) with the high pressure grouting pump Grout-jetting pipe is injected in the pressurization of the cement paste in the mixer, make in cement paste this position in pile body and spread, the amount of pouring at this position is every cubic metre and pours into cement paste 130-150 litre;
(4) take out Grout-jetting pipe and promptly finish this vibration punching slurry The Macadam Pile Construction process.
2, vibration punching slurry The Macadam Pile Construction method according to claim 1, it is characterized in that: with the step of high pressure grouting pump with the pressurization of the cement paste in mixer injection Grout-jetting pipe, the water in the employed cement paste is 0.4-0.6 with the ratio of cement: 1 described.
3, the employed equipment of the job practices of claim 1, this equipment includes vibrating impacter, cement mixer, high pressure grouting pump, it is characterized in that: this high pressure grouting delivery side of pump connects Grout-jetting pipe by high-pressure rubber pipe, the link of this Grout-jetting pipe is an opening, the other end is for sealing, and ring is established several and is penetrated the slurry hole on the tube wall of this Grout-jetting pipe, and hole count distribute from sealing end from down and on reduce gradually.
4, equipment according to claim 3 is characterized in that: described Grout-jetting pipe is 1 " steel pipe, long is 3-5 rice.
5, equipment according to claim 4, it is characterized in that: penetrating on the described Grout-jetting pipe starched the hole from 5 centimeters of sealing ends, and line up 4 by 10 centimeters spacings and arrange, every row's hole count is respectively 8,6,4,2 from bottom to top, and the slurry hole of penetrating on every row evenly distributes, and the described diameter of penetrating the slurry hole is 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99109216 CN1100182C (en) | 1999-06-22 | 1999-06-22 | Construction method of vibration punching slurry-bitstone pile and apparatus used thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99109216 CN1100182C (en) | 1999-06-22 | 1999-06-22 | Construction method of vibration punching slurry-bitstone pile and apparatus used thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1243183A true CN1243183A (en) | 2000-02-02 |
| CN1100182C CN1100182C (en) | 2003-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99109216 Expired - Fee Related CN1100182C (en) | 1999-06-22 | 1999-06-22 | Construction method of vibration punching slurry-bitstone pile and apparatus used thereof |
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| CN (1) | CN1100182C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713189B (en) * | 2008-10-06 | 2012-10-17 | 吴保全 | Construction process of floral tube dry filling piles |
| CN104358249A (en) * | 2014-11-13 | 2015-02-18 | 中国水电基础局有限公司 | Method and system for water and gas combined sand settling prevention for vibroflotation gravel |
| CN107100160A (en) * | 2017-06-24 | 2017-08-29 | 浙江华东工程咨询有限公司 | A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column |
| CN110106869A (en) * | 2019-04-23 | 2019-08-09 | 中铁四局集团第四工程有限公司 | A kind of construction method of neighbouring Business Line crushed stone grouting pile |
-
1999
- 1999-06-22 CN CN 99109216 patent/CN1100182C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713189B (en) * | 2008-10-06 | 2012-10-17 | 吴保全 | Construction process of floral tube dry filling piles |
| CN104358249A (en) * | 2014-11-13 | 2015-02-18 | 中国水电基础局有限公司 | Method and system for water and gas combined sand settling prevention for vibroflotation gravel |
| CN104358249B (en) * | 2014-11-13 | 2016-06-22 | 中国水电基础局有限公司 | Water-gas linkage desilting for vibro-replacement stone stops method and system |
| CN107100160A (en) * | 2017-06-24 | 2017-08-29 | 浙江华东工程咨询有限公司 | A kind of construction technology for lower storage reservoir check dam vibro-replacement stone column |
| CN110106869A (en) * | 2019-04-23 | 2019-08-09 | 中铁四局集团第四工程有限公司 | A kind of construction method of neighbouring Business Line crushed stone grouting pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1100182C (en) | 2003-01-29 |
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Owner name: BEIJING ZHENCHONG ENGINEERING STOCK CO., LTD. Free format text: FORMER OWNER: JUYINGDA ROCKY-SOIL TECHNOLOGY DEVELOPMENT CO., LTD., BEIJING Effective date: 20030905 |
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Effective date of registration: 20030905 Patentee after: Zhenchong Engineering Co., Ltd, Beijing Patentee before: Juyingda Rocky-Soil Technology Development Co., Ltd., Beijing |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030129 Termination date: 20140622 |
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