CN102465529A - Automatically extended large-head wavy edge jet grouting anchor pile for pile end anchor bar, and construction method thereof - Google Patents
Automatically extended large-head wavy edge jet grouting anchor pile for pile end anchor bar, and construction method thereof Download PDFInfo
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- CN102465529A CN102465529A CN2010105351434A CN201010535143A CN102465529A CN 102465529 A CN102465529 A CN 102465529A CN 2010105351434 A CN2010105351434 A CN 2010105351434A CN 201010535143 A CN201010535143 A CN 201010535143A CN 102465529 A CN102465529 A CN 102465529A
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Abstract
The invention relates to an automatically extended large-head wavy edge jet grouting anchor pile for a pile end anchor bar, and a construction method thereof, which are similar to the traditional anchor pile and the construction method thereof. An anchor pile rig is used for construction, the anchor pile has a jet grouting cement soil pile body, and two to four anchor cables are arranged at the center of the pile body. The automatically extended large-head wavy edge jet grouting anchor pile for the pile end anchor bar is characterized in that: an automatically extended radial anchor bar is arranged at the end part of the jet grouting cement soil pile body, the diameter of the end part of the pile body is 10-120cm larger than that of the pile body, the jet grouting cement soil pile body is in a spirally cylindrical shape, and the major axis around the pile is in a wavy shape. Compared with the prior art, the invention has the following obvious advantages that: the pullout resistance is increased by 40-70% compared with the current anchor pile, the construction process is simple, the number of anchor piles can be reduced, and the cost of foundation pit support is reduced.
Description
Technology neck city
The present invention relates to building engineering field, relate in particular to a kind of end dowel automatic expansion major part rippled edge churning anchoring pile and worker's method thereof.
Background technology
At present, the building foundation pit supporting that oneself knows is used the churning anchoring pile, is successively successively to be constructed simultaneously in the mining process at foundation ditch by the anchoring pile rig; Creep into to hole wall soil layer water filling on the foundation ditch limit earlier by the three-wing bit on the rig (bore 12-18cm), until the design hole depth, bore draw the hole after; Withdraw from three-wing bit; Change guniting drilling bit, the steel strand (also claiming anchor cable) of 2-3 root Φ 14-20 are fixed on the anchor cable dish, head on anchor cable disk center hole by guniting drilling bit and anchor cable is delivered to the bottom of drawing the hole; The spout of being resprayed by two-fold or three while advancing is whitewashed at the bottom of aperture to hole; Shotcrete pipe withdraws from Shi Zaicong and draws hole bottom upwards at the uniform velocity churning water and cement paste (triple churnings are gas, water and cement paste) are to the aperture, and the long anchor cable of 1.5-2m is reserved in the aperture, makes and the later stage anchorage cable stretching as foundation ditch concrete Guan Liang.The cylindric cement soil body such as this kind uplift resistance is not high, and 2-3 root anchor cable passes diameter 10-12cm, and behind the hole of the anchor cable dish of thick 8-14mm, bending is fixed on the anchor cable dish; To the aperture, the anchor cable overcoat rubber plastic pipe (sharp later stage stretch-draw), when the bigger or single anchorage cable stretching tonnage of excavation slope downslide soil body gravity is big from the anchor cable dish; Anchor cable will spur from the cement soil body, reduce uplift resistance, therefore; For excavation slope stable, must the anchoring piles of beating more, increase and invest.
Summary of the invention
The object of the present invention is to provide a kind of end dowel automatic expansion major part rippled edge churning anchoring pile and worker's method thereof, have high tonnage, high uplift resistance, can reduce the pattern foundation pit supporting structure expense.
The objective of the invention is to realize: hold dowel automatic expansion major part rippled edge churning anchoring pile and worker's method thereof for a kind of through following technical scheme; The same with existing anchoring pile and worker's method thereof, all by the anchoring pile drilling machine construction, all have the churning cement soil pile; 2-4 root anchor cable is all arranged at the pile body center; It is characterized in that at churning cement earth pile end of body the dowel of radial automatic expansion being arranged, the pile body end diameter is than the big 10-120cm of pile body diameter; The churning cement soil pile is cylindric in the shape of a spiral, and all major axis of stake are wavy.Dowel automatic expansion described herein is behind the three-wing bit drilling to completion, from draw the hole, withdraws from three-wing bit, changes reaming bit into; Be pushed into 1-3m place water filling reaming at the bottom of the hole, reaming bit is made up of 1-3 layer steel chain or steel throw away tip, and dowel one end electric welding is on the anchor cable dish; The other end is crooked or be welded with and increase sear sheet or reinforcing bar, and dowel selects the elasticity reinforcing bar, outside radial splitting out after the electric welding; With band slip-knot rope dowel is tied up bunchy; Again 2-4 root anchor cable is passed hole on the anchor cable dish respectively, every anchor cable separately, is also twisted the curved little steel wire of forming anchor cable at the anchor cable dish back side, head on the anchor cable center hole by the churning drilling rod anchor cable is pushed into the hole depth portion of drawing; Spur and take out the slip-knot rope then, the elasticity reinforcing bar automatically springs open and is extended to radial.The all major axis of stake described herein are wavy, are to adopt the theoretical gravitational sliding face of enlarged footing to foundation ditch from the bottom, and (triple churnings then are gas, water and cement paste churning with uprising the pressure rotary-spraying cement paste; The stake footpath can reach 800-1200mm); Because high pressure batch, churning body diameter intermittently becomes greatly, and pile body also just forms the spiral circle column; The all major axis of stake also are wavy fluctuating, increase uplift resistance; To the aperture, adopt the mesolow churning from gravitational sliding face, dwindle the stake footpath, alleviate gravitational sliding soil body weight, reduce the horizontal thrust of the outer soil body in hole in the hole.
The present invention compared with prior art has following remarkable advantage: a kind of end dowel automatic expansion major part rippled edge churning anchoring pile, improve uplift resistance 40-70% than existing anchoring pile, and construction technology is simple, can reduce anchoring pile quantity, and reduce the pattern foundation pit supporting structure cost.
Description of drawings
Fig. 1 is a churning anchoring pile sketch map of the present invention.
Among the figure: 1. miscellaneous fill, 2. sprayed mortar, 3. soil nailing, 4. mud, 5. foundation ditch; 6. concrete Guan Liang, 7. churning cement-soil pile body, 8. anchor cable, 9. anchor cable positioning disk; 10. argillic horizon, 11. boring supporting castinplace piles, 12. contain the sand clay layer, 13. anchor cable dishes; 14. the elasticity reinforcing bar, 15. increase sear sheet or reinforcing bar, 16. enlarged footings, the theoretical soil body gravitational sliding face of 17. foundation ditches.
Fig. 2 is a reaming bit sketch map of the present invention.
Among the figure: 1. drilling rod, 2. reaming blade, 3. spring is 4. hinged, 5. the jetting hole.
The specific embodiment
An exemplary embodiments of the present invention such as Fig. 1; When the building foundation pit excavation depth reaches under design concrete Guan Liang (6) absolute altitude 0.5m; Go up laying spacing 150 * 150 Φ 6 steel mesh reinforcements in side slope soil layer (1), (4), (10), insert Φ 16 reinforcing bars (3) of long 3m by 1200 * 1200 spacings and make soil nailing.Three-wing bit (bore 12-18cm) by the anchoring pile rig creeps into to projected depth to hole wall soil layer on the foundation ditch limit again, as the hole of drawing of anchor cable (8), withdraws from three-wing bit then; Change reaming bit (Fig. 2), the beginning water filling is crept at 1-3m place at the bottom of the hole, holds soil layer to get enlarged footing (16) stake; With (14) the one end electric welding of elasticity reinforcing bar on anchor cable dish (13), elasticity reinforcing bar (14) other end burn-on 50 * 50 increase sear sheet (15), and outwards be radial splitting out to elasticity reinforcing bar (14); With band slip-knot rope elasticity reinforcing bar (14) is tied up bunchy; Anchor cable (8) with 3 Φ 16 passes upward hole of anchor cable dish (13) respectively again, and every anchor cable (8) separately, is also twisted the little steel wire of curved composition anchor cable (8) at anchor cable dish (13) back side, head on anchor cable dish (13) centre bore by the churning drilling rod anchor cable (8) is pushed into the hole depth portion of drawing; The cement paste of churning simultaneously; Then, pulling is also taken out the slip-knot rope, and elasticity reinforcing bar (14) automatically springs open and be extended to radial.When withdrawing from the churning pipe, the theoretical gravitational sliding face (17) of enlarged footing to foundation ditch from the bottom, employing uprises the pressure rotary-spraying cement paste, and (triple churnings then are gas, water and cement paste churning; The stake footpath can reach 800-1200mm); High pressure batch is interrupted churning body diameter and becomes big, forms the spiral circle column; The all major axis of stake also are wavy, increase the uplift resistance of pile body (7); To the aperture, adopt the mesolow churning from gravitational sliding face (17), purpose is dwindled the stake footpath, alleviates gravitational sliding soil body weight, reduces the horizontal thrust of the outer soil body in hole in the hole.Making and later stage anchor cable (8) the traction stretch-draw of 1.5-2m anchor cable (8) as foundation ditch concrete Guan Liang (6) is reserved in the aperture.After waiting to be preced with concrete Guan Liang (6) construction and concrete strength thereof and reaching; Reach builder's tonnage with special-purpose jack tension anchor cable (8); Put anchor cable positioning disk (9), the anchor cable of the unnecessary length of oxyacetylene metal-cutting (8), a kind of end dowel automatic expansion major part rippled edge churning anchoring pile promptly completes; Go round and begin again, accomplish the construction of other piles.
Claims (3)
1. a stake end dowel automatic expansion major part rippled edge churning anchoring pile and worker's method thereof are the same with existing anchoring pile and worker's method thereof, all by the anchoring pile drilling machine construction; All have the churning cement soil pile, 2-4 root anchor cable is all arranged at the pile body center, it is characterized in that; The dowel that radial automatic expansion is arranged at churning cement earth pile end of body; The pile body end diameter is than the big 10-120cm of pile body diameter, and the churning cement soil pile is cylindric in the shape of a spiral, and all major axis of stake are wavy.
2. according to claim 1, dowel automatic expansion described herein is behind the three-wing bit drilling to completion, from draw the hole, withdraws from three-wing bit; Change reaming bit into, be pushed into 1-3m place water filling reaming at the bottom of the hole, reaming bit is made up of 1-3 layer steel chain or steel throw away tip; Dowel one end electric welding is on the anchor cable dish, and the other end is crooked or be welded with and increase sear sheet or reinforcing bar, and dowel selects the elasticity reinforcing bar; Outside radial splitting out after the electric welding tied up bunchy with band slip-knot rope with dowel, again 2-4 root anchor cable passed hole on the anchor cable dish respectively; Every anchor cable separately, is also twisted the curved little steel wire of forming anchor cable at the anchor cable dish back side; Head on the anchor cable center hole by the churning drilling rod anchor cable is pushed into the hole depth portion of drawing, spur and take out the slip-knot rope then, the elasticity reinforcing bar automatically springs open and is extended to radial.
3. according to claim 1; The all major axis of stake described herein are wavy; Be to adopt the theoretical gravitational sliding face of enlarged footing to foundation ditch, with uprising pressure rotary-spraying cement paste (triple churnings then are gas, water and cement paste churning, and the stake footpath can reach 800-1200mm) from the bottom; Make pile body form the spiral circle column, all major axis of stake also are wavy fluctuating; To the aperture, adopt the mesolow churning from gravitational sliding face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105351434A CN102465529A (en) | 2010-11-08 | 2010-11-08 | Automatically extended large-head wavy edge jet grouting anchor pile for pile end anchor bar, and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105351434A CN102465529A (en) | 2010-11-08 | 2010-11-08 | Automatically extended large-head wavy edge jet grouting anchor pile for pile end anchor bar, and construction method thereof |
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| CN102465529A true CN102465529A (en) | 2012-05-23 |
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| CN2010105351434A Pending CN102465529A (en) | 2010-11-08 | 2010-11-08 | Automatically extended large-head wavy edge jet grouting anchor pile for pile end anchor bar, and construction method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4411557A (en) * | 1977-03-31 | 1983-10-25 | Booth Weldon S | Method of making a high-capacity earthbound structural reference |
| CN1095781A (en) * | 1993-05-27 | 1994-11-30 | 卢锡焕 | In order to promote the spacing ground anchor side grouting construction method of anchoring force |
| JP2003003467A (en) * | 2001-06-21 | 2003-01-08 | Nihonkai Gijutsu Consultants:Kk | Ground anchor work using bellmouthed pipe, and bellmouthed pipe |
| CN1615385A (en) * | 2002-01-22 | 2005-05-11 | 亨宁·巴尔策·拉斯马森 | Reinforcement unit for reinforcing a footing element and method for placing a foundation pile and reinforcement of a footing element |
| CN101205719A (en) * | 2007-12-05 | 2008-06-25 | 中国科学院地质与地球物理研究所 | Deep-thick earth-rock aggregate pawl type blasting anchor device |
| CN201137069Y (en) * | 2007-11-09 | 2008-10-22 | 王国奋 | Impact force resistant friction pile for high-rise building |
| CN101575854A (en) * | 2009-06-10 | 2009-11-11 | 陕西中机岩土工程有限责任公司 | High-pressure jet grouting enlarged footing anchor rod and construction method thereof |
| CN101649614A (en) * | 2008-08-14 | 2010-02-17 | 刘全林 | Variable-diameter multi-direction anchor pile |
-
2010
- 2010-11-08 CN CN2010105351434A patent/CN102465529A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4411557A (en) * | 1977-03-31 | 1983-10-25 | Booth Weldon S | Method of making a high-capacity earthbound structural reference |
| CN1095781A (en) * | 1993-05-27 | 1994-11-30 | 卢锡焕 | In order to promote the spacing ground anchor side grouting construction method of anchoring force |
| JP2003003467A (en) * | 2001-06-21 | 2003-01-08 | Nihonkai Gijutsu Consultants:Kk | Ground anchor work using bellmouthed pipe, and bellmouthed pipe |
| CN1615385A (en) * | 2002-01-22 | 2005-05-11 | 亨宁·巴尔策·拉斯马森 | Reinforcement unit for reinforcing a footing element and method for placing a foundation pile and reinforcement of a footing element |
| CN201137069Y (en) * | 2007-11-09 | 2008-10-22 | 王国奋 | Impact force resistant friction pile for high-rise building |
| CN101205719A (en) * | 2007-12-05 | 2008-06-25 | 中国科学院地质与地球物理研究所 | Deep-thick earth-rock aggregate pawl type blasting anchor device |
| CN101649614A (en) * | 2008-08-14 | 2010-02-17 | 刘全林 | Variable-diameter multi-direction anchor pile |
| CN101575854A (en) * | 2009-06-10 | 2009-11-11 | 陕西中机岩土工程有限责任公司 | High-pressure jet grouting enlarged footing anchor rod and construction method thereof |
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Address after: 26, building 325000, railway building, Wenzhou Avenue, Lucheng District, Zhejiang, Wenzhou Applicant after: Zou Zongxuan Address before: 350000, Fujian, Fuzhou province Cangshan district on the cross Liansheng District, building 4, 301 Applicant before: Zou Zongxuan |
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Application publication date: 20120523 |