CN103821146B - A kind of explosion cutting piles technique of PC pile tube - Google Patents
A kind of explosion cutting piles technique of PC pile tube Download PDFInfo
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- CN103821146B CN103821146B CN201410048712.0A CN201410048712A CN103821146B CN 103821146 B CN103821146 B CN 103821146B CN 201410048712 A CN201410048712 A CN 201410048712A CN 103821146 B CN103821146 B CN 103821146B
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Abstract
An explosion cutting piles technique for PC pile tube, belongs to technical field of building construction.Its construction technology comprises pile foundation excavation, mark Pipe pile design elevation line, iron hoop anchor ear are held tightly, the processing of demolition set, demolition set placement, guard against and to detonate and explosion terminates the rear pile tube to abolishing and carries out reinforcing bar cutting and clear, explosion cuts stake and terminates.The present invention is by adopting above-mentioned technology, annular detonating fuse symmetry is utilized to detonate, explosive force is evenly to pile tube explosion work done, and make pile tube evenly broken near detonating fuse explosion, pile tube adopts the measure of iron hoop anchor ear simultaneously, blast action power is avoided to expand toward bottom, make reserve part pile body intact, thus play explosion and cut an effect, it has, and 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.
Description
Technical field
The invention belongs to technical field of building construction, be specifically related to a kind of explosion cutting piles technique with the PC pile tube of the advantages such as the speed of abolishing is 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 is because its bearing capacity of single pile is high, pile sinking reliable in quality, geological conditions strong adaptability, construction costs are the most cheap, mechanized construction degree is high, scene clean and tidy, construction environment is good, pile tube is batch production, specialization, standardized production simultaneously, be widely used in the multiple highrise building of less than 60 layers and industrial 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 heterogeneity that is comparatively large because of the heterogeneity of engineering geological conditions, bearing stratum fluctuations and pile tube specification, in piling construction, often occur that tubular pile head is higher than design elevation situation, artificial pneumatic pick can be adopted to cut for usual a small amount of process or machine cuts mode carries out abolishing the raised area pile crown.Artificial and mechanical treatment efficient is low when a large amount of pile crown need be abolished, affect construction speed, and cost of labor is high, process 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 with the PC pile tube of the advantages such as the speed of abolishing is 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 terminates, carry out the work of pit earthwork excavation, till being excavated to design elevation, and strengthen surveying work in digging process, avoid backbreaking or owe to dig;
2) Pipe pile design elevation line is marked
After pile foundation excavation exposes foundation ditch face, adopt level gauge to measure to all superelevation pile tubes, and mark Pipe pile design elevation line, cutting pile is carried out to superelevation part;
3) iron hoop anchor ear is held tightly
In step 2) Pipe pile design elevation line place adopt iron hoop anchor ear to hold pile tube tightly, protect the part pile tube pile foundation that need retain;
4) processing of demolition set
Demolition set comprises the hole outside fix frame and hole inner position frame that are connected by connection cord, hole outside fix frame is arranged on aperture on pile tube, hole inner position frame is arranged in hole of post, connection cord upper end is fixed on the center of hole outside fix frame, lower end is fixed on the outer of hole inner position frame, and the surrounding of hole inner position frame arranges detonating fuse, and detonating fuse both sides arrange primer detonator, primer detonator arranges detonating cord, and the detonating cord other end stretches out aperture on pile tube;
5) placement of demolition set
Demolition set completion of processing, first the hole inner position frame of good for colligation detonating fuse and primer detonator is put into pile tube gently, hole outside fix frame is placed on aperture on pile tube, and by the shelf cross searching alignment tube pile center of hole outside fix frame, makes hole inner position frame placed in the middle;
6) guard against and detonate
After the placement of demolition set completes, draw warning line to around pile tube, then detonate;
7) after explosion terminates, carry out reinforcing bar cutting and clear the pile tube abolished, explosion cuts stake and terminates.
The explosion cutting piles technique of described a kind of PC pile tube, is characterized in that the 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, it is characterized in that the iron hoop anchor ear diameter 8-10mm less of pile tube diameter described in step 3), its width 25-30mm, 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, it is characterized in that hole outside fix frame described in step 4) and hole inner position frame are all for being the cross structure that right-angled intersection is formed by two iron wires, outside fix frame iron wire length used in hole equals pile tube external diameter; Inner position frame iron wire length used in hole 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, is connected respectively with the primer detonator being arranged on detonating fuse both sides.
The explosion cutting piles technique of described a kind of PC pile tube, is equipped with counterweight under it is characterized in that the hole inner position frame described in step 4).
The explosion cutting piles technique of described a kind of PC pile tube, it is characterized in that described counterweight is balancing weight or the plastics counter balance pocket that rock ballast is housed, 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, and its length is than aperture on pile tube and the little 100mm of Pipe pile design elevation line spacing.
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 15-20mm less 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 elevation line place, explosion is carried out with demolition set, make Pipe pile design absolute altitude above 300-500mm scope inner concrete all broken after explosion, pile tube falls down to the ground, and is beneficial to pipe pile reinforcing bar cutting and subsequent treatment; And owing to have employed iron hoop anchor ear, the active force to bottom pile body when counteracting blast action during explosion, makes design elevation stand intact with lower part pile body;
2) demolition set structure of the present invention is simple, easy to make, and cost is low, positioning action is simple and easy, for applying;
3) primer detonator used during explosion of the present invention and detonating fuse consumption is few, cost is low, and force of explosion is relatively little, security performance is high;
4) the present invention is by arranging counterweight in inner position frame bottom, hole, is fixed in the middle of cross, plays the effect of stable demolition set; When placing demolition set, hole outside fix frame is placed on aperture on pile tube, and by shelf cross searching alignment tube pile center, ensures that detonating fuse Central Symmetry in pore in bottom is arranged, make tube wall uniform force after explosion;
5) explosion cutting piles technique of the present invention, annular detonating fuse symmetry is utilized 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, blast action power is avoided to expand toward bottom, make reserve part pile body intact, thus 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, 5-detonates separated time, 6-detonating fuse, 7-primer detonator, 8-counterweight, 9-iron hoop anchor ear, 10-hole inner position frame.
Detailed description of the invention
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, for cutting out the superelevation part of pile tube, but do not affect other parts, its concrete steps are as follows:
1) pile foundation excavation
Pile tube piling construction terminates, and carries out the work of pit earthwork excavation, and excavating final absolute altitude is absolute altitude at the bottom of the bed course of design foundation ditch or cushion cap, should strengthen surveying work, avoid backbreaking or owe to dig in digging process;
2) Pipe pile design elevation line is marked
After pile foundation excavation exposes foundation ditch face, adopt level gauge to measure to all superelevation pile tubes 4, and mark pile tube pile foundation design elevation line, superelevation part need carry out cutting pile;
3) iron hoop anchor ear is held tightly
Adopt iron hoop anchor ear 9 to hold tightly at Pipe pile design elevation line place, iron hoop anchor ear 9 is the annular element of opening, its diameter 8-10mm less 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, preferred diameter difference 10mm, width 30mm, thickness 3.0mm; Its Main Function is that protection needs reserve part pile foundation, and when preventing explosion to cut, reserve part is damaged;
4) demolition set processing and placement
The demolition set of this technology adopts hole inner position frame 10, hole outside fix frame 2 is to inside and outside Dual positioning, hole inner position frame 10, hole outside fix frame 2 is cross iron wire and makes, hole outside fix frame 2 is used for the erection of top, aperture and location on pile tube 4, hole inner position frame 10 is used for fixing detonating fuse 6 and hole inner position, two locating racks adopt connection cord 3 to connect, this connection cord 3 is generally plastic ties, connection cord 3 one end is connected to the cross searching of hole outside fix frame 2, the other end can be connected to four ends of the cross of hole inner position frame 10, between two locating racks plastic ties length be on pile tube aperture to design pile tube elevation line above 100mm, inner position frame 10 bottom, hole arranges counterweight 8, counterweight 8 is generally the plastics counter balance pocket that rock ballast is equipped with in balancing weight or employing, its weight is 0.3-0.4kg, be fixed in the middle of cross, play the effect of stable 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, and be generally 3-5 and enclose dose, both sides arrange primer detonator 7 and detonate.
Demolition set completion of processing, placement work can be carried out, first counterweight 8 and the good detonating fuse 6 of colligation are put into pile tube 4 gently with the hole inner position frame 10 of primer detonator 7 during placement, again hole outside fix frame 2 is placed on aperture on pile tube, and by shelf cross searching alignment tube pile center, ensure that bottom detonating fuse 6 Central Symmetry in pore is arranged, make tube wall uniform force after explosion;
5) demolition set placement is complete can carry out warning and detonate work;
6) explosion terminates, and carries out reinforcing bar cutting and clear the pile tube abolished.
The present invention all adopts common 12# iron wire for the iron wire making hole inner position frame 10 and hole outside fix frame 2; Connection cord 3 adopts common plastics nylon rope; Detonating fuse 6 used 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, annular detonating fuse symmetry is utilized 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, blast action power is avoided to expand toward bottom, make reserve part pile body intact, thus 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 (9)
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 terminates, carry out the work of pit earthwork excavation, till being excavated to design elevation, and strengthen surveying work in digging process, avoid backbreaking or owe to dig;
2) Pipe pile design elevation line is marked
After pile foundation excavation exposes foundation ditch face, adopt level gauge to measure to all superelevation pile tubes, and mark Pipe pile design elevation line, cutting pile is carried out to superelevation part;
3) iron hoop anchor ear is held tightly
In step 2) Pipe pile design elevation line place adopt iron hoop anchor ear (9) to hold pile tube tightly, protect the part pile tube pile foundation that need retain;
4) processing of demolition set
Demolition set comprises the hole outside fix frame (2) and hole inner position frame (10) that are connected by connection cord (3), hole outside fix frame (2) is arranged on aperture on pile tube, hole inner position frame (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 in hole inner position frame (10), the surrounding in hole inner position frame (10) arranges detonating fuse (6), detonating fuse (6) both sides arrange primer detonator (7), primer detonator (7) is arranged detonating cord (1), detonating cord (1) other end stretches out aperture on pile tube;
5) placement of demolition set
Demolition set completion of processing, first good for colligation detonating fuse (6) and hole inner position frame (10) of primer detonator (7) are put into pile tube (4) gently, hole outside fix frame (2) is placed on the upper aperture of pile tube (4), and the shelf cross searching of hole outside fix frame (2) is aimed at pile tube (4) center, make hole inner position frame (10) placed in the middle;
6) guard against and detonate
After the placement of demolition set completes, draw warning line to around pile tube, then detonate;
7) after explosion terminates, carry out reinforcing bar cutting and clear the pile tube abolished, explosion cuts stake and terminates.
2. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, is characterized in that the 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 8 mm or 10mm less of pile tube diameter described in step 3), iron hoop anchor ear (9) width 25-30mm, iron hoop anchor ear (9) 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, 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) being arranged on detonating fuse (6) both sides.
5. the explosion cutting piles technique of a kind of PC pile tube according to claim 1, is equipped with counterweight (8) under it is characterized in that hole inner position frame (10) described in step 4).
6. the explosion cutting piles technique of a kind of PC pile tube according to claim 5, it is characterized in that described counterweight (8) is for balancing weight or the plastics counter balance pocket that rock ballast is housed, its weight is 0.3-0.4kg.
7. 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, and its length is than aperture on pile tube and the little 100mm of Pipe pile design elevation line spacing.
8. 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.
9. the explosion cutting piles technique of a kind of PC pile tube according to claim 8, is characterized in that detonating fuse (6) circle diameter 15 mm or 20mm less 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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| 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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| CN103821146B true CN103821146B (en) | 2015-08-19 |
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| CN107268627B (en) * | 2017-07-14 | 2019-08-23 | 中国一冶集团有限公司 | One kind being suitable for 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 |
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|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6311716A (en) * | 1986-07-01 | 1988-01-19 | Mitani Sekisan Kk | Construction of pile |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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