CN103821146A - Pile detonating and cutting construction process for PC (prestressed concrete) tubular piles - Google Patents
Pile detonating and cutting construction process for PC (prestressed concrete) tubular piles Download PDFInfo
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- CN103821146A CN103821146A CN201410048712.0A CN201410048712A CN103821146A CN 103821146 A CN103821146 A CN 103821146A CN 201410048712 A CN201410048712 A CN 201410048712A CN 103821146 A CN103821146 A CN 103821146A
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Abstract
The invention discloses a pile detonating and cutting construction process for PC tubular piles and belongs to the technical field of building construction. The construction process includes excavating of pile foundation, marking of elevation line of the tubular pile, hooping of iron hoops, processing of a detonator, arrangement of the detonator, warning, detonating and breaking before cutting and cleaning reinforced ribs of the broken tubular pile, and end of pile detonating and cutting. By utilizing annular detonating cords for symmetric detonating, detonation force uniformly stress on detonation of the tubular pile, so that the tubular pile can be uniformly broken near detonation of the detonating cords. Meanwhile, by hooping, detonation force is avoided from extending downwards, the pile is well reserved, and pile detonating and cutting effect is achieved. Besides, the pile detonating and cutting construction process has the advantages of fast detonating speed, low labor intensity and cost, safety, reliability and no damage to the reserved part and the like, and is quite applicable to large-scale pile cutting construction.
Description
Technical field
The invention belongs to technical field of building construction, be specifically related to a kind of explosion cutting piles technique of the PC pile tube with advantages such as the speed of abolishing are fast, labour intensity is low, cost is low, safe and reliable.
Background technology
Along with reform and opening-up, economic construction development, China's City Construction Project is on the increase.In building foundation engineering, PC pile tube because its bearing capacity of single pile is high, pile sinking reliable in quality, geological conditions strong adaptability, construction costs is the most cheap, mechanized construction degree is high, on-the-spot clean and tidy, construction environment is good, pile tube is batch production, specialization, standardized production simultaneously, be widely used in 60 layers of following multiple highrise building and industry and civilian construction embedded footing on piles, low capped pile foundation plinth, the engineering foundations such as railway, highways and bridges, harbour, harbour, water conservancy, municipal administration, structure and main equipment.But the heterogeneity of and pile tube specification large because of the heterogeneity of engineering geological conditions, bearing stratum fluctuations, in piling construction, tend to occur that tubular pile head is higher than design elevation situation, conventionally a small amount of processing can adopt artificial pneumatic pick to cut or machine cuts mode is abolished the raised area pile crown.Artificial and mechanical treatment efficiency is low when a large amount of pile crowns need be abolished, affect construction speed, and cost of labor is high, processing potential safety hazard is large.
Summary of the invention
For the above-mentioned problems in the prior art, the object of the present invention is to provide a kind of explosion cutting piles technique of the PC pile tube with advantages such as the speed of abolishing are fast, labour intensity is low, cost is low, safe and reliable.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that comprising the steps:
1) pile foundation excavation
After pile tube piling construction finishes, carry out the work of pit earthwork excavation, till being excavated to design elevation, and in digging process, strengthen surveying work, avoid backbreaking or owe and dig;
2) mark Pipe pile design absolute altitude line
Pile foundation excavation exposes after foundation ditch face, adopts level gauge to measure, and mark Pipe pile design absolute altitude line to all superelevation pile tubes, and superelevation part is carried out to cutting pile;
3) iron hoop anchor ear is held tightly
In step 2) Pipe pile design absolute altitude line place adopt iron hoop anchor ear to hold pile tube tightly, protection needs the part pile tube pile foundation retaining;
4) processing of demolition set
Demolition set comprises locating rack in the hole outside fix frame that connected by connection cord and hole, hole outside fix frame is arranged on to aperture on pile tube, in hole, locating rack is arranged in hole of post, connection cord upper end is fixed on outside fix Jia center, hole, lower end is fixed on the outer of locating rack in hole, and in hole, the surrounding of locating rack arranges detonating fuse, and detonating fuse both sides arrange primer detonator, detonating cord is set on primer detonator, and the detonating cord other end stretches out aperture on pile tube;
5) placement of demolition set
Demolition set completion of processing, first locating rack in the hole of good colligation detonating fuse and primer detonator is put into pile tube gently, hole outside fix frame is placed on to aperture on pile tube, and by the shelf cross center alignment tube pile center of hole outside fix frame, makes in hole locating rack placed in the middle;
6) guard against and detonate
After the placement of demolition set completes, pile tube is drawn to warning line around, then detonate;
7) after explosion finishes, the pile tube of abolishing is carried out reinforcing bar cutting and cleared, explosion cuts stake and finishes.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that design elevation described in step 1) is absolute altitude at the bottom of the bed course of design foundation ditch or cushion cap.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that iron hoop anchor ear diameter described in step 3) is than the little 8-10mm of pile tube diameter, its width 25-30mm, and thickness 2.8-3.2mm, the termination of iron hoop anchor ear is by bolt tightening.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that in hole outside fix frame described in step 4) and hole, locating rack is all for being by two iron wires the cross structure that right-angled intersection forms, and outside fix frame iron wire length used in hole equals pile tube external diameter; In hole, locating rack iron wire length used is less than pile tube internal diameter 10-15mm slightly.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that the detonating cord bottom described in step 4) is divided into two separated times that detonate, and is connected respectively with the primer detonator that is arranged on detonating fuse both sides.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that under locating rack, being equipped with counterweight in the hole described in step 4).
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that described counterweight is balancing weight or the plastics counter balance pocket that rock ballast is housed, and its weight is 0.3-0.4kg.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that the connection cord described in step 4) is plastic ties, aperture and the little 100mm of Pipe pile design absolute altitude distance between centers of tracks on its Length Ratio pile tube.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that the detonating fuse described in step 4) is loop configuration.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that detonating fuse circle diameter is than the little 15-20mm of pile tube internal diameter.
By adopting above-mentioned technology, compared with prior art, beneficial effect of the present invention is as follows:
1) by adopting explosion cutting piles technique of the present invention, adopt iron hoop anchor ear to hold pile tube tightly at Pipe pile design absolute altitude line place, carry out explosion with demolition set, after explosion, make the above 300-500mm scope of Pipe pile design absolute altitude inner concrete all broken, pile tube falls down to the ground, and is beneficial to pipe pile reinforcing bar cutting and subsequent treatment; And owing to having adopted iron hoop anchor ear, the active force to bottom pile body while having offset blast action when explosion, makes the following part pile body of design elevation excellent;
2) demolition set of the present invention is simple in structure, easy to make, and cost is low, positioning action is simple and easy, for applying;
3) primer detonator used and detonating fuse consumption is few, cost is low when explosion of the present invention, and force of explosion is relatively little, and security performance is high;
4) the present invention arranges counterweight by locating rack bottom in hole, is fixed in the middle of cross, plays the effect of stablizing demolition set; Place when demolition set, hole outside fix frame be placed on to aperture on pile tube, and by shelf cross center alignment tube pile center, guarantee that detonating fuse Central Symmetry in pore in bottom arranges, make explosion after tube wall stressed evenly;
5) explosion cutting piles technique of the present invention, utilize annular detonating fuse symmetry to detonate, explosive force is evenly to pile tube explosion work done, make pile tube evenly broken near detonating fuse explosion, pile tube adopts the measure of iron hoop anchor ear simultaneously, avoid blast action power to expand toward bottom, make reserve part pile body intact, thereby play explosion and cut an effect, it has that the speed of abolishing is fast, labour intensity is low, cost is light, safe and reliable, and do not damage the advantages such as reserve part pile body, be particularly suitable for large-scale cutting piles.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1-detonating cord, 2-hole outside fix frame, 3-connection cord, 4-pile tube, the 5-separated time that detonates, 6-detonating fuse, 7-primer detonator, 8-counterweight, 9-iron hoop anchor ear, locating rack in 10-hole.
The specific embodiment
Below in conjunction with Figure of description, the invention will be further described, but protection scope of the present invention is not limited in this:
As shown in Figure 1, PC pile tube explosion cutting piles technique of the present invention, cuts out for the superelevation part to pile tube, but does not affect other parts, and its concrete steps are as follows:
1) pile foundation excavation
Pile tube piling construction finishes, and carries out the work of pit earthwork excavation, excavates final absolute altitude and be absolute altitude at the bottom of the bed course of design foundation ditch or cushion cap, in digging process, should strengthen surveying work, avoids backbreaking or owes and dig;
2) mark Pipe pile design absolute altitude line
Pile foundation excavation exposes after foundation ditch face, adopts level gauge to measure, and mark pile tube pile foundation design elevation line to all superelevation pile tubes 4, and superelevation part need be carried out cutting pile;
3) iron hoop anchor ear is held tightly
Adopt iron hoop anchor ear 9 to hold tightly at Pipe pile design absolute altitude line place, the annular element that iron hoop anchor ear 9 is opening, its diameter is than the little 8-10mm of pile tube diameter, its width 25-30mm, thickness 2.8-3.2mm, the termination of iron hoop anchor ear 9 is by bolt tightening, the preferably poor 10mm of diameter, width 30mm, thickness 3.0mm; Its Main Function is for protection needs reserve part pile foundation, and while preventing that explosion from cutting, reserve part is damaged;
4) demolition set processing and placement
The demolition set of this technology adopts locating rack 10 in hole, hole outside fix frame 2 is to inside and outside Dual positioning, locating rack 10 in hole, hole outside fix frame 2 is cross iron wire and makes, outside fix frame 2 in hole sets up and locates use for top, aperture on pile tube 4, in hole, locating rack 10 is used for location in fixing detonating fuse 6 and hole, two locating racks adopt connection cord 3 to connect, this connection cord 3 is generally plastic ties, connection cord 3 one end are connected to the cross center of hole outside fix frame 2, the other end can be connected to four ends of the cross of locating rack 10 in hole, between two locating racks, plastic ties length is that on pile tube, the above 100mm of design pile tube absolute altitude line is arrived in aperture, in hole, locating rack 10 bottoms arrange counterweight 8, counterweight 8 is generally balancing weight or employing and is equipped with the plastics counter balance pocket of rock ballast, its weight is 0.3-0.4kg, be fixed in the middle of cross, play the effect of stablizing demolition set, detonating fuse 6 of the present invention is for being circular layout, and its circle diameter is less than pile tube internal diameter 10-15mm, is generally 3-5 circle dose, and both sides arrange primer detonator 7 and detonate.
Demolition set completion of processing, can carry out placement work, when placement, first locating rack 10 in the hole of counterweight 8 and the good detonating fuse 6 of colligation and primer detonator 7 is put into pile tube 4 gently, again hole outside fix frame 2 is placed on to aperture on pile tube, and by shelf cross center alignment tube pile center, guarantee that bottom detonating fuse 6 Central Symmetry in pore arranges, make explosion after tube wall stressed evenly;
5) demolition set is placed the complete work of can guarding against and detonate;
6) explosion finishes, and the pile tube of abolishing is carried out reinforcing bar cutting and cleared.
The present invention all adopts common 12# iron wire for making the iron wire of locating rack 10 and hole outside fix frame 2 in hole; Connection cord 3 adopts common plastics nylon rope; Detonating fuse used 6 adopt meet national standard mould shell waterproof detonating fuse; Primer detonator 7 adopts and meets national standard Nonel detonator.
Explosion cutting piles technique of the present invention, utilize annular detonating fuse symmetry to detonate, explosive force is evenly to pile tube explosion work done, make pile tube evenly broken near detonating fuse explosion, pile tube adopts the measure of iron hoop anchor ear simultaneously, avoid blast action power to expand toward bottom, make reserve part pile body intact, thereby play explosion and cut an effect, it has that the speed of abolishing is fast, labour intensity is low, cost is light, safe and reliable, and do not damage the advantages such as reserve part pile body, be particularly suitable for large-scale cutting piles.
Claims (10)
1. an explosion cutting piles technique for PC pile tube, is characterized in that comprising the steps:
1) pile foundation excavation
After pile tube piling construction finishes, carry out the work of pit earthwork excavation, till being excavated to design elevation, and in digging process, strengthen surveying work, avoid backbreaking or owe and dig;
2) mark Pipe pile design absolute altitude line
Pile foundation excavation exposes after foundation ditch face, adopts level gauge to measure, and mark Pipe pile design absolute altitude line to all superelevation pile tubes, and superelevation part is carried out to cutting pile;
3) iron hoop anchor ear is held tightly
In step 2) Pipe pile design absolute altitude line place adopt iron hoop anchor ear (9) hold pile tube tightly, protection need retain part pile tube pile foundation;
4) processing of demolition set
Demolition set comprises by locating rack (10) in the hole outside fix frame (2) of connection cord (3) connection and hole, hole outside fix frame (2) is arranged on to aperture on pile tube, locating rack in hole (10) is arranged in hole of post, connection cord (3) upper end is fixed on the center of hole outside fix frame (2), lower end is fixed on the outer of locating rack in hole (10), the surrounding of locating rack in hole (10) arranges detonating fuse (6), detonating fuse (6) both sides arrange primer detonator (7), detonating cord (1) is set on primer detonator (7), and detonating cord (1) other end stretches out aperture on pile tube;
5) placement of demolition set
Demolition set completion of processing, first locating rack (10) in the hole of good colligation detonating fuse (6) and primer detonator (7) is put into pile tube (4) gently, hole outside fix frame (2) is placed on to the upper aperture of pile tube (4), and pile tube (4) center is aimed in the shelf cross center of hole outside fix frame (2), make locating rack in hole (10) placed in the middle;
6) guard against and detonate
After the placement of demolition set completes, pile tube is drawn to warning line around, then detonate;
7) after explosion finishes, the pile tube of abolishing is carried out reinforcing bar cutting and cleared, explosion cuts stake and finishes.
2. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, is characterized in that design elevation described in step 1) is absolute altitude at the bottom of the bed course of design foundation ditch or cushion cap.
3. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, it is characterized in that iron hoop anchor ear (9) diameter described in step 3) is than the little 8-10mm of pile tube diameter, its width 25-30mm, thickness 2.8-3.2mm, the termination of iron hoop anchor ear (9) is by bolt tightening.
4. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, it is characterized in that in hole outside fix frame (2) described in step 4) and hole, locating rack (10) is all for being by two iron wires the cross structure that right-angled intersection forms, hole outside fix frame (2) iron wire length used equals pile tube (4) external diameter; Locating rack in hole (10) iron wire length used is less than pile tube (4) internal diameter 10-15mm slightly.
5. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, is characterized in that detonating cord (1) bottom described in step 4) is divided into two separated times that detonate (5), is connected respectively with the primer detonator (7) that is arranged on detonating fuse (6) both sides.
6. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, is characterized in that under locating rack (10), being equipped with counterweight (8) in the hole described in step 4).
7. the explosion cutting piles technique of a kind of PC pile tube according to claim 6, is characterized in that described counterweight (8) is balancing weight or the plastics counter balance pocket that rock ballast is housed, and its weight is 0.3-0.4kg.
8. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, is characterized in that the connection cord (3) described in step 4) is plastic ties, aperture and the little 100mm of Pipe pile design absolute altitude distance between centers of tracks on its Length Ratio pile tube.
9. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, is characterized in that the detonating fuse (6) described in step 4) is loop configuration.
10. the explosion cutting piles technique of a kind of PC pile tube according to claim 9, is characterized in that detonating fuse (6) circle diameter is than the little 15-20mm of pile tube (4) internal diameter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410048712.0A CN103821146B (en) | 2014-02-12 | 2014-02-12 | A kind of explosion cutting piles technique of PC pile tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410048712.0A CN103821146B (en) | 2014-02-12 | 2014-02-12 | A kind of explosion cutting piles technique of PC pile tube |
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| CN103821146A true CN103821146A (en) | 2014-05-28 |
| CN103821146B CN103821146B (en) | 2015-08-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268627A (en) * | 2017-07-14 | 2017-10-20 | 中国冶集团有限公司 | One kind is applied to large-scale cast-in-situ bored pile pile crown restructuring bankrupt |
| CN109736303A (en) * | 2019-01-14 | 2019-05-10 | 中国兵器工业北方勘察设计研究院有限公司 | It is a kind of to press pour water soil static pressure pipe pile structure and construction method |
| CN112779906A (en) * | 2021-01-08 | 2021-05-11 | 新城控股集团股份有限公司 | Precast concrete pipe pile structure and pile cutting method for manufacturing uplift pile by using precast concrete pipe pile structure |
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| JPS6311716A (en) * | 1986-07-01 | 1988-01-19 | Mitani Sekisan Kk | Construction of pile |
| CN1749484A (en) * | 2005-10-17 | 2006-03-22 | 卫龙武 | Construction method for prefabricated tubular pile with expanding head |
| CN101392531A (en) * | 2008-09-25 | 2009-03-25 | 中国建筑第六工程局有限公司 | Construction method for cutting and breaking reinforced concrete pile, column or ground beam |
| CN101456217A (en) * | 2008-12-30 | 2009-06-17 | 中铁十二局集团有限公司 | CFG anchor circumferential cutting device |
| CN201722687U (en) * | 2010-07-06 | 2011-01-26 | 陕西建工集团机械施工有限公司 | Tubular pile cutting device |
| CN102425159A (en) * | 2011-08-31 | 2012-04-25 | 浙江大学城市学院 | Pile cutting construction method of bored concrete pile |
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2014
- 2014-02-12 CN CN201410048712.0A patent/CN103821146B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6311716A (en) * | 1986-07-01 | 1988-01-19 | Mitani Sekisan Kk | Construction of pile |
| CN1749484A (en) * | 2005-10-17 | 2006-03-22 | 卫龙武 | Construction method for prefabricated tubular pile with expanding head |
| CN101392531A (en) * | 2008-09-25 | 2009-03-25 | 中国建筑第六工程局有限公司 | Construction method for cutting and breaking reinforced concrete pile, column or ground beam |
| CN101456217A (en) * | 2008-12-30 | 2009-06-17 | 中铁十二局集团有限公司 | CFG anchor circumferential cutting device |
| CN201722687U (en) * | 2010-07-06 | 2011-01-26 | 陕西建工集团机械施工有限公司 | Tubular pile cutting device |
| CN102425159A (en) * | 2011-08-31 | 2012-04-25 | 浙江大学城市学院 | Pile cutting construction method of bored concrete pile |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107268627A (en) * | 2017-07-14 | 2017-10-20 | 中国冶集团有限公司 | One kind is applied to large-scale cast-in-situ bored pile pile crown restructuring bankrupt |
| CN109736303A (en) * | 2019-01-14 | 2019-05-10 | 中国兵器工业北方勘察设计研究院有限公司 | It is a kind of to press pour water soil static pressure pipe pile structure and construction method |
| CN112779906A (en) * | 2021-01-08 | 2021-05-11 | 新城控股集团股份有限公司 | Precast concrete pipe pile structure and pile cutting method for manufacturing uplift pile by using precast concrete pipe pile structure |
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| CN103821146B (en) | 2015-08-19 |
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