CN1884712A - Explosion-enlarging stake construction process - Google Patents
Explosion-enlarging stake construction process Download PDFInfo
- Publication number
- CN1884712A CN1884712A CN 200610088122 CN200610088122A CN1884712A CN 1884712 A CN1884712 A CN 1884712A CN 200610088122 CN200610088122 CN 200610088122 CN 200610088122 A CN200610088122 A CN 200610088122A CN 1884712 A CN1884712 A CN 1884712A
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- China
- Prior art keywords
- concrete
- explosion
- hole
- pile
- filling
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- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010276 construction Methods 0.000 title claims description 23
- 239000002689 soil Substances 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 239000011083 cement mortar Substances 0.000 claims description 11
- 238000004880 explosion Methods 0.000 claims description 8
- 229910052571 earthenware Inorganic materials 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004576 sand Substances 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract 4
- 229940079593 drug Drugs 0.000 abstract 4
- 239000004568 cement Substances 0.000 abstract 2
- 239000011241 protective layer Substances 0.000 abstract 1
- 239000002360 explosive Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005474 detonation Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000004181 pedogenesis Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a method for constructing explosive-forming pile, which comprises: first, digging one horn well mouth at the soil; then at the center of well mouth, downwards drilling vertical tile hole to preset depth; arranging integrated drug pack into hole bottom; arranging sleeve at the center of borehole; filling bar drug pack into sleeve; filling mixed concrete or cement sand pulp between the borehole and sleeve; covering steel plate at the open of borehole; stacking carrier matter on the steel plate; exploding the drug pack and bar drug pack, after 3-8 hours when the filled concrete or cement sand pulp are poured, to form tile post and tile head with concrete protective layer; pouring concrete into tile head and tile post to form explosive-forming pile. The invention has simple process and better forming effect without reducing radius and sink hole.
Description
Technical field
The present invention relates to a kind of explosion-enlarging stake construction process, be particularly useful for the pile foundation construction in the cohesive soil, also applicable to the pile foundation construction of loose soil layer and the pile foundation construction under the MODEL OVER COMPLEX TOPOGRAPHY.
Background technology
Utilizing explosive charge energy extrusion soil formation explosion expanded piling in compressible soil layer to execute the basis is a domestic and international technique known.Traditional explosion expanded piling basic technology is with artificial or mechanical method Drilling big gun hole in the place of wanting building foundation, the blast with linear charges that rises in the blast hole makes the big gun hole be expanded into pile, bottom the pile hole, place then and concentrate or the annular cartridge bag and the formation kettle shape pile crown that detonates, last penetration concrete or laying reinforcing bar pouring pile basis in the hole.Problems such as pile hole wall collapse, necking down very easily appear in this explosion expanded piling technology in work progress, growth of soil mass crack, springback capacity are big, not only cause the pile Forming Quality poor, have also influenced the bearing capacity of pile foundation greatly, even can not meet design requirement.In addition, pile and pile crown be explosive expansion at twice generally, and the quick-fried pile crown in back not only influences the stability of quick-fried pile surrounding soil earlier, and the construction technology more complicated.
Summary of the invention
Technical problem: it is regular to the purpose of this invention is to provide a kind of moulding, and the soil layer compression zone is big, the explosion-enlarging stake construction process that bearing capacity is high.
Technical scheme: a kind of explosion-enlarging stake construction process of the present invention, at first in soil layer, excavate out a tubaeform well head, then in downward Drilling plumb pile hole, well head center to projected depth; Put into point charge at the bottom of the hole, and at the center in big gun hole sleeve pipe is set, load blast with linear charges in sleeve pipe, the sleeve pipe of filling blast with linear charges can adopt plastic pipe, also can adopt glass tube and earthenware; Concrete that filling stirs between big gun hole and sleeve pipe or cement mortar cover steel plate in the big gun aperture, pile up ballast on the steel plate; Treat that the concrete of filling or cement mortar carry out explosion in the pouring back that finishes after 3～8 hours, detonate simultaneously point charge and blast with linear charges, onepull forms pile and the pile crown that has concrete supporting; Placing of concrete forms explosion expanded piling in pile crown and pile.
Beneficial effect: a kind of explosion-enlarging stake construction process of the present invention, adopt at foot of hole and arrange point charge, arrange blast with linear charges by thin-walled minor diameter plastic pipe in drill center, and point charge and blast with linear charges are connected airtight.Around the cartridge bag behind the placing of concrete, detonate simultaneously point charge and blast with linear charges, utilize the compressibility of soil layer and concrete in process of setting, to have thixotropy and under the blast impulse effect, change the characteristics of fluidised form and quick-hardening into, in explosive forming pile and enlarged footing, form concrete supporting, thereby effectively control the resilience of pile body surrounding soil, slump and necking down, reach and improve explosion-enlarging stake construction process quality and bearing capacity, can onepull form pile and the pile crown that has concrete supporting, placing of concrete forms the explosion-enlarging stake construction process basis in pile crown and pile at last.This construction technology stake hole forming is regular, the problems such as hole, necking down of collapsing can not occur, the Forming Quality height, and the soil layer compression zone is big, can obviously improve the bearing capacity of pile foundation.Realize pile and enlarged footing one-shot forming, both alleviated labour intensity, efficiency of construction is provided again.Its technology is simple, and the stake hole does not have obvious undergauge, the hole of not collapsing, and the soil layer consolidation effect is good, and pile-forming effect is reliable, is applicable to the construction on various building pile basis in clay and the loosening sand layer, has practicality widely.
Description of drawings
Fig. 1 is an explosion-enlarging stake construction process schematic diagram of the present invention.
Fig. 2 is an explosion-enlarging stake construction process pile schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
A kind of explosion-enlarging stake construction process of the present invention according to on-site actual situations, is set blasting parameter, determines required aperture, hole depth, charge diameter, explosive payload, concrete amount and burst time.Form explosive funnel near the stake mouth when avoiding explosive expansion, before explosive expansion, in the soil layer 1 of stake mouth position, dig out earlier the well head 2 of a toroidal.At well head 2 center Drilling diameters is the big gun hole 3 of 100mm～300mm, the point charge of setting 4 is placed on hole, big gun hole at the bottom of.Then the thin-walled plastic pipe 5 of internal diameter 25mm～40mm being positioned the center in big gun hole 3, is that the blast with linear charges 6 of 25mm～38mm is packed in the plastic pipe again with diameter, and point charge 4 and blast with linear charges 6 are connected airtight.Filling concrete or cement mortar 7 in the space after powder charge finishes between big gun hole 3 and plastic pipe 5 then cover steel plate 8 and ballast 9 in the aperture, after concrete casting is finished 3～8 hours, and the powder charge in the big gun hole 3 of detonating.Behind the charging explosion, explosive load at first acts on concrete or the cement mortar 7 between powder charge and the big gun hole 3, make concrete or cement mortar 7 take place that thixotropings change fluidised form into and along the big gun aperture to moving, concrete or the cement mortar 7 outer soil layers distortion that under transmission detonation stresses ripple and detonation gas compression, is squeezed simultaneously.The detonation of blast with linear charges 6 makes and forms a pile cavity 10 and a sheath 12 in the soil layer, and the point charge energy mainly is consumed in formation pile crown cavity 11.Concrete or cement mortar 7 quick-hardenings in the cavity forming process form the concrete supporting with higher-strength in soil layer, can fine inhibition collapse hole, resilience and necking down take place, and increase soil layer densification scope, have improved the explosion-enlarging stake construction process quality.Simultaneously, characteristic that concrete or cement mortar 7 are transformed to fluidised form by solid-state and semisolid under explosive load has also suppressed forming of crack in the soil layer, has increased the soil layer supporting capacity.Because point charge 4 detonates simultaneously at the bottom of blast with linear charges 6 and the hole, thus can one time explosive expansion moulding pile and pile crown, improve efficiency of construction greatly, avoid the disturbance of soil layer secondary.
Claims (3)
1. explosion-enlarging stake construction process is characterized in that:
1) at first in soil layer (1), excavate out a tubaeform well head (2), then at well head (2) the downward Drilling vertical hole in center (3) to projected depth;
2) at the bottom of the hole, put into point charge (4), and sleeve pipe (5) is set, filling blast with linear charges (6) in sleeve pipe (5) at the center of stake hole (3);
3) concrete that filling stirs between big gun hole (3) and sleeve pipe (5) or cement mortar (7) cover steel plate (8) in the stake aperture, steel plate (8) is gone up and piled up ballast (9);
4) treat that the concrete of filling or cement mortar (7) stay for some time after, detonate simultaneously point charge (4) and blast with linear charges (6), onepull forms pile (10) and the pile crown (11) that has concrete supporting;
5) placing of concrete forms explosion expanded piling in pile crown (11) and pile (10).
2. explosion-enlarging stake construction process according to claim 1 is characterized in that: the sleeve pipe (5) of filling blast with linear charges can adopt plastic pipe, also can adopt glass tube and earthenware.
3. explosion-enlarging stake construction process according to claim 1 and 2 is characterized in that: concrete or cement mortar (7) in filling between big gun hole (3) and the sleeve pipe (5) are carried out explosion after 3～8 hours after pouring finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100881226A CN100429353C (en) | 2006-06-27 | 2006-06-27 | Explosion-enlarging stake construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100881226A CN100429353C (en) | 2006-06-27 | 2006-06-27 | Explosion-enlarging stake construction process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1884712A true CN1884712A (en) | 2006-12-27 |
| CN100429353C CN100429353C (en) | 2008-10-29 |
Family
ID=37583012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100881226A Expired - Fee Related CN100429353C (en) | 2006-06-27 | 2006-06-27 | Explosion-enlarging stake construction process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100429353C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845819A (en) * | 2010-05-25 | 2010-09-29 | 武汉大学 | Method for solidifying support of deep and thick soil side slope |
| CN101922167A (en) * | 2010-09-16 | 2010-12-22 | 刘建永 | Method for taking water by explosively enlarging spiral filter tube |
| CN101942831A (en) * | 2010-09-16 | 2011-01-12 | 关洪军 | Method for blasting and enlarging jet grouting pile |
| CN103290837A (en) * | 2013-06-06 | 2013-09-11 | 金陵科技学院 | Construction method of explosive expanding of cast-in-place pile and air exhausting device thereof |
| CN108952212A (en) * | 2018-07-04 | 2018-12-07 | 中国人民解放军陆军工程大学 | Device for removing cylindrical steel column without punching blasting and blasting method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2955732B2 (en) * | 1993-04-06 | 1999-10-04 | 靖二 中島 | Equivalent conversion method between concentrated charge and rod charge |
| CN1113530A (en) * | 1995-01-05 | 1995-12-20 | 王守彬 | Construction method of foundation piles on soft stratum |
| CN1053244C (en) * | 1996-08-30 | 2000-06-07 | 张明生 | Shaped pile hole blasting monolithic forming method |
| JP3062133B2 (en) * | 1997-09-17 | 2000-07-10 | ドンスー シム | Rock cutting method using tensile fracture |
| JP2002138470A (en) * | 2000-10-30 | 2002-05-14 | Taisei Corp | Developing tool of cage, under-reamed pile method and structure of under-reamed pile |
| CN1141457C (en) * | 2000-12-08 | 2004-03-10 | 赵书平 | Base-extending deposited pile and its formation process |
| CN1419102A (en) * | 2002-10-10 | 2003-05-21 | 游宝健 | Blasting hole construction method for ladder section deep hole blasting |
| CN1443919A (en) * | 2003-04-02 | 2003-09-24 | 孙祥旺 | Well-digging method and its equipment |
| CN100516377C (en) * | 2005-10-17 | 2009-07-22 | 卫龙武 | Construction method for prefabricated tubular pile with expanding head |
-
2006
- 2006-06-27 CN CNB2006100881226A patent/CN100429353C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845819A (en) * | 2010-05-25 | 2010-09-29 | 武汉大学 | Method for solidifying support of deep and thick soil side slope |
| CN101845819B (en) * | 2010-05-25 | 2012-02-22 | 武汉大学 | Method for solidifying support of deep and thick soil side slope |
| CN101922167A (en) * | 2010-09-16 | 2010-12-22 | 刘建永 | Method for taking water by explosively enlarging spiral filter tube |
| CN101942831A (en) * | 2010-09-16 | 2011-01-12 | 关洪军 | Method for blasting and enlarging jet grouting pile |
| CN103290837A (en) * | 2013-06-06 | 2013-09-11 | 金陵科技学院 | Construction method of explosive expanding of cast-in-place pile and air exhausting device thereof |
| CN108952212A (en) * | 2018-07-04 | 2018-12-07 | 中国人民解放军陆军工程大学 | Device for removing cylindrical steel column without punching blasting and blasting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100429353C (en) | 2008-10-29 |
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Granted publication date: 20081029 |