CN1293290A - Technology for forming pile by under-reaming and grouting - Google Patents
Technology for forming pile by under-reaming and grouting Download PDFInfo
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- CN1293290A CN1293290A CN 00132892 CN00132892A CN1293290A CN 1293290 A CN1293290 A CN 1293290A CN 00132892 CN00132892 CN 00132892 CN 00132892 A CN00132892 A CN 00132892A CN 1293290 A CN1293290 A CN 1293290A
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Abstract
A technology for forming expanded bottom and post-grouted pile includes under-reaming, forming pile hole and grouting. Its advantages include high quality of pile body, high load bearing capacity in creased by 100% and short construction period reduced by 50% as compared with ordinary R.C. cast pile, and bearing capacity increased by 15% and saving raw material by 10% as compared with post-grouted pile with squeezed expanded bearing discs.
Description
The present invention relates to the construction field of building foundation, be specially a kind of process of forming pile by under-reaming and grouting.
The deposited reinforced concrete pile that adopts in the geotechnical engineering field at present mainly contains three kinds of ordinary reinforced concrete castinplace piles, grouting behind shaft or drift lining deposited reinforced concrete pile, extruding-enlarging branch tray deposited reinforced concrete pile.The two kinds of castinplace piles in back are new concrete castinplace piles of releasing in the recent period, the problem that post grouting pile exists grouting amount to be difficult to determine, the bad bearing capacity that not only can not reduce construction costs but also can not effectively improve stake of grouting amount control; The transfer law of compacted bearing disk pile power is indeterminate, and whether compacted bearing disk pile has permanent, stable bearing capacity does not have experimental data and theory analysis to prove at present, and this is disadvantageous to promoting the use of of compacted bearing disk pile.Post grouting pile and compacted bearing disk pile still require than higher the mud thickness in stake week and the control of pile bottom sediment amount, and this is to shortening the construction period and guaranteeing that the quality of stake is disadvantageous.
Purpose of the present invention is the defective that overcomes the existing concrete castinplace pile, and a kind of pile-formation process method--process of forming pile by under-reaming and grouting of new castinplace pile is provided.
The present invention adopts following measure to realize: the process of this expansion bottom post-grouting pile comprises the moulding and the grouting behind shaft or drift lining bored pile piling technology method two parts in bottom-enlarging filling pile stake hole.The stake hole of extruding-enlarging branch tray deposited reinforced concrete pile of the prior art vertically is provided with a plurality of dishes, be used to improve its bearing capacity, but because there is above-mentioned deficiency in it, the present invention has only kept a dish at the bottom of stake, form the bottom-enlarging filling pile hole, and the process of grouting behind shaft or drift lining bored pile piling is above-mentioned maturation process method, therefore, content of the present invention comes down to the improvement of extruding-enlarging branch tray bored pile piling technology and combining of grouting behind shaft or drift lining bored pile piling technology, it has utilized post grouting pile technology to improve the pile peripheral friction force of castinplace pile simultaneously, eliminating pile bottom sediment and compacted bearing disk pile technology increases the advantage of bearing capacity of pile tip, overcome the defective and the deficiency of post grouting pile technology and compacted bearing disk pile technology, this combination has produced outstanding, significant effect.Because grouting behind shaft or drift lining bored pile piling technology method is existing maturation process, the present invention does not do concrete description to it in claims.
Expansion bottom post-grouting stake power transport mechanism of the present invention is clear and definite, pile quality is good, can increase substantially deposited reinforced concrete pile bearing capacity, reduce construction costs, shorten construction period of pile foundation engineering, compare with the ordinary reinforced concrete castinplace pile and can improve bearing capacity 100%, save raw material 50%, shorten the construction period 50%, compare with compacted bearing disk pile with post grouting pile and can improve bearing capacity 15%, save raw material 10%, remarkably productive, obvious.Other can form on the ground in a hole applicable to general cohesive soil, silt, sandy soil, gravelly sand, cobble, strong-weathered rock etc. in this expansion bottom post-grouting stake.
Accompanying drawing is the structural representation of the concrete enforcement of process of the present invention;
The present invention is specifically described as follows below in conjunction with accompanying drawing: the pile-formation process method of this expansion bottom post-grouting stake comprises the moulding and the grouting behind shaft or drift lining bored pile piling technology in bottom-enlarging filling pile stake hole, during concrete enforcement, utilize special equipment to get bottom-enlarging filling pile stake hole 1, carry out grouting behind shaft or drift lining perfusion pile-formation process then, this technology comprises the steps: to be lowered to reinforcing cage in the stake hole, the reinforcing cage middle part is around slip casting flexible pipe 4 porose on it, be connected with middle part slip casting flexible pipe 2 with the slip casting all flex tee, be arranged vertically the bottom slip casting steel pipe 3 that the end has one way valve 6 hole week along stake, be provided with the high pressure valve 7 of avoiding slip casting to reflux in the upper end of Grouting Pipe; To stake hole concrete perfusion, when treating that concrete strength reaches 70% left and right sides of design strength, be pressed into cement paste by bottom and middle part Grouting Pipe respectively, eliminate pile bottom sediment and all inherent shortcomings of stake by the modes such as expansion, compacted and splitting densification of oozing of slurries, improve stake pedosphere face, make the soil body in the Zhou Yiding scope obtain reinforcing, soil strength increases, increase pile side resistance, improve the bearing capacity of stake end.
Claims (1)
1, a kind of process of forming pile by under-reaming and grouting is characterized by: this process comprises the moulding and the grouting behind shaft or drift lining bored pile piling technology two parts in bottom-enlarging filling pile stake hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001328921A CN1148494C (en) | 2000-11-10 | 2000-11-10 | Technology for forming pile by under-reaming and grouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001328921A CN1148494C (en) | 2000-11-10 | 2000-11-10 | Technology for forming pile by under-reaming and grouting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1293290A true CN1293290A (en) | 2001-05-02 |
| CN1148494C CN1148494C (en) | 2004-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001328921A Expired - Fee Related CN1148494C (en) | 2000-11-10 | 2000-11-10 | Technology for forming pile by under-reaming and grouting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1148494C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793027A (en) * | 2010-04-02 | 2010-08-04 | 孔超 | Core-grouted static pressure anchor rod pile |
| CN102162247A (en) * | 2010-02-21 | 2011-08-24 | 韩顺和 | Construction method of branch cast-in-place pile |
| CN104074184A (en) * | 2014-05-07 | 2014-10-01 | 孔超 | Pile base post-grouted expanded-base bored pile |
| CN104805834A (en) * | 2015-04-29 | 2015-07-29 | 上海市机械施工集团有限公司 | Cast-in-place and precast integrated pile (ICP pile) and manufacturing method thereof |
-
2000
- 2000-11-10 CN CNB001328921A patent/CN1148494C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162247A (en) * | 2010-02-21 | 2011-08-24 | 韩顺和 | Construction method of branch cast-in-place pile |
| CN102162247B (en) * | 2010-02-21 | 2013-02-27 | 韩顺和 | Construction method of branch cast-in-place pile |
| CN101793027A (en) * | 2010-04-02 | 2010-08-04 | 孔超 | Core-grouted static pressure anchor rod pile |
| CN101793027B (en) * | 2010-04-02 | 2015-02-25 | 孔超 | Core-grouted static pressure anchor rod pile |
| CN104074184A (en) * | 2014-05-07 | 2014-10-01 | 孔超 | Pile base post-grouted expanded-base bored pile |
| CN104074184B (en) * | 2014-05-07 | 2017-01-25 | 孔超 | Pile base post-grouted expanded-base bored pile |
| CN104805834A (en) * | 2015-04-29 | 2015-07-29 | 上海市机械施工集团有限公司 | Cast-in-place and precast integrated pile (ICP pile) and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1148494C (en) | 2004-05-05 |
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Granted publication date: 20040505 Termination date: 20141110 |
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| EXPY | Termination of patent right or utility model |