CN103498476B - Major-diameter hole-forming pile pier foundation and net foundation slab reverse building construction method - Google Patents
Major-diameter hole-forming pile pier foundation and net foundation slab reverse building construction method Download PDFInfo
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- CN103498476B CN103498476B CN201310476802.5A CN201310476802A CN103498476B CN 103498476 B CN103498476 B CN 103498476B CN 201310476802 A CN201310476802 A CN 201310476802A CN 103498476 B CN103498476 B CN 103498476B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009435 building construction Methods 0.000 title abstract 2
- 238000010276 construction Methods 0.000 claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000002689 soil Substances 0.000 claims description 17
- 238000009412 basement excavation Methods 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 230000008093 supporting effect Effects 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 230000010412 perfusion Effects 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 210000000481 breast Anatomy 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims description 3
- 230000009172 bursting Effects 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 3
- 230000004941 influx Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000007726 management method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000013517 stratification Methods 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 239000002352 surface water Substances 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 238000004078 waterproofing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The invention discloses a major-diameter hole-forming pile pier foundation and net foundation slab reverse building construction method. The method comprises the steps of earth excavating, foundation slab pouring, pier position cave reserving, waterstop installing, pier foundation constructing, pier foundation waterproof treatment and the like. By means of the method, construction is convenient, and the construction effect is good. The stability of pile legs is guaranteed through the self-weight of a net foundation slab, and the stability of a foundation pit support is guaranteed through a support inner brace. The processing technique is advanced, and the method is safe, reliable, obvious in economic benefit and social benefit and worth popularizing and applying.
Description
Technical field
The present invention relates to a kind of major diameter drilling pile pier foundation and netted sole plate reversed construction method.
Background technology
In deep foundation pit of tall buildings work progress at some with major diameter drilling pile pier foundation; often can run into the design alteration that basement structure level is added or embedded depth of foundation is deepened; if the change of this type occurs in foundation pit supporting system constructed after; can be because of the further intensification of design elevation at the bottom of major diameter pier foundation; and causing supporting depth requirements also to be deepened thereupon, original support system cannot meet supporting requirement.If rethink construction supporting system, certainly will cause larger economic loss and construction delay to engineering, even take some strengthening measures also to have larger difficulty on former supporting basis, and may not necessarily ensure long-term supporting effect, how the appropriate problem of handling this pattern foundation pit supporting structure in particular cases well has just become a difficult problem in engineering construction.
Summary of the invention
The object of the present invention is to provide a kind of easy construction, the major diameter drilling pile pier foundation that construction effect is good and netted sole plate reversed construction method.
Technical solution of the present invention is:
A kind of major diameter drilling pile pier foundation and netted sole plate reversed construction method, is characterized in that: comprise the following steps:
(1) soil excavation
(1) soil excavation requires machinery to be once excavated to the above 20mm of back-plane design absolute altitude place, manually repair and dig to design elevation, after completing, check of foundation subsoil carries out immediately building of bed course, waterproof roll and netted underplate concrete, shorten as far as possible drying in the air the groove time of foundation ditch, discharge and reduce because of dry in the air resistance to shear of soil that groove overlong time causes of foundation ditch preventing, or rainwater soaks the impact that the special circumstances such as foundation ditch cause support system, thereby ensure the stability of support system;
(2) carry out the drainage works that falls of foundation ditch when soil excavation, foundation ditch base arranges gutter and sump, to prevent that rainwater from soaking foundation ditch and causing the destruction to support system;
(2) build sole plate
(1) must be ferreted out+1.0m absolute altitude control line on wall, post reinforcing bar, and draw upper red triangle with red paint and make marks, scene has level gauge, to sump absolute altitude priority control, so that levelling is at any time grasped absolute altitude dynamic;
(2), in the time building sole plate concrete in mass, take balance pouring at reserved opening, from bottom to top, vibration compacting;
(3) concrete surface makes real after rubbing and pressure with wood float, then uses plasterer's trowel press polish, ensures surperficial compactness and fineness, slows down concrete surface dehydrating speed, prevents surface checking; After the press polish of surface, after slightly due-in water, cover layer of plastic film in time at concrete surface, additional two-layer exhausted combustion straw screen or mat quilt, prevents the appearance in crack;
(3) hole, pier position is stayed and is established and waterstop setting
(1) in the time of construction of bottom plates, first on foundation pad, adopt transit setting-out to go out pile pier bit position, then to prop with the framed pile pier position opening mould plate of reserving of customization, exact position the final location of finally checking template are fixing again, accurate to ensure pier position;
(2) before sole plate is built, together with adopting with pier foundation hole seam at base plate steel plate water stopper with together with the double-deck waterproof of rubber swelling sealing rod
(3) after reserved pier position hole place form removable, residual concrete and scum silica frost on cleaning tape edge and reinforcing bar in time, carry out interface waterproof roll protection work, and interface concrete surface is picked and cuts a hole into pitted skin, have an effective adhesive when ensureing the follow-up concreting in pile pier position;
(4) pile pier foundation construction
(1) before pile foundation construction, adopt transit to carry out setting-out by design pier position, ensure that pile pier position is accurate, and guarantee that spot face position and the biased difference of design pier are not more than 5cm;
(2) before construction, establish gutter, collecting well in pier mouth surrounding, prevent that surface water from entering in hole; Dun Kou goes along with sb. to guard him than the high 30cm in ground, prevents that soil, stone, foreign material from rolling in hole and hurting sb.'s feelings; Employing interval, Wa Dun hole borehole method, influences each other while avoiding constructing, keeps the stable of the pier hole wall soil body;
(3) pier hole excavation adopts merogenesis shoveling method, artificial hand-held pneumatic pick or pick successively merogenesis excavation and retaining wall from top to bottom, and every joint cutting depth is 0.5m to 1m; In the time that rock in pier must bursting work, adopt short hole blasting method, borehole depth is no more than 0.4m at hard formation, and incompetent bed is no more than 0.8m; Explosion adopts specialized team, and near borehole, adds strong supporting, prevents shock collapse Dun Bi;
(4) while lifting means being installed, make wire rope center and the pier axially bored line position consistency of well-bucket, rough control central line during as shoveling; On every joint retaining wall, establish cross control point, ceiling hammer does center line, determines pier footpath with horizontal rod;
(5) retaining wall adopts inner bearing type template, external tooth type concrete guard wall, breast wall concrete job mix machine mix, and diesel dumper transport, steel tumbling barrel enters mould, and internal vibration rod is made firm by ramming; In breast wall concrete, mix accelerating admixture, dado template is removed after 24h; Borehole reaches after projected depth, notifies in time the department such as management, design to carry out an acceptance inspection, qualified rear rapid back cover;
(6) reinforcing cage adopts tower crane whole once to lift hand-hole in place, and when lifting, Heave Here is located at and strengthens stirrup position, hangs directly to hold up surely, aims at pier hole and slowly sinks, and avoids colliding Dun Bi, and hoisted in position deviation is not more than 5cm; The topping of cage of reinforcement, by penetrate center drilling on spiral bar, the circular C30 cement mortar bedding block of thick 5cm ensures, mortar piece is by vertically establishing together every 2m, often penetrates 6 layouts along circumference together;
(7) concrete adopts commercial concrete, concrete delivery truck transport, and with the perfusion of deceleration tumbling barrel, tumbling barrel bottom is not more than 2m with pier inner bottom part or concrete surface height; After pore-forming, pour into immediately pier shaft concrete, and the same day disposable completing; The method of taking continuous stratification perfusion, layering to vibrate, every layer of influx height must not exceed 1.5m, and the every layer of thickness that vibrates must not exceed 0.5m; It is real that concrete adopts perfusion limit, internal vibration rod limit to insert, to ensure concrete compactness; Pier top concrete is smeared and is flattened before initial set, and surface will cut to ensure to be connected well with top pier cap if any laitance layer;
(5) pier foundation waterproofing work
After pile pier place cushion construction completes, be subsidy construction waterproof roll, reinforcing bar and steel pipe adopt welding steel waterproof through base plate place, and waterproof roll paving is on waterproof steel plate, and waterproof steel plate root on steel pipe and reinforcing bar is sticked on one deck enhancement Layer.
Easy construction of the present invention, construction effect is good; By netted base plate, deadweight has ensured the stable of footing part, and has doubled as one supporting inner support and ensured the stability of pattern foundation pit supporting structure.Technology advanced person, safe and reliable, economic benefit and social benefit are obvious, are worthy of popularization.
Below in conjunction with embodiment, the invention will be further described.
Detailed description of the invention
A kind of major diameter drilling pile pier foundation and netted sole plate reversed construction method, comprise the following steps:
(1) soil excavation
(1) soil excavation requires machinery to be once excavated to the above 20mm of back-plane design absolute altitude place, manually repair and dig to design elevation, after completing, check of foundation subsoil carries out immediately building of bed course, waterproof roll and netted underplate concrete, shorten as far as possible drying in the air the groove time of foundation ditch, discharge and reduce because of dry in the air resistance to shear of soil that groove overlong time causes of foundation ditch preventing, or rainwater soaks the impact that the special circumstances such as foundation ditch cause support system, thereby ensure the stability of support system;
(2) carry out the drainage works that falls of foundation ditch when soil excavation, foundation ditch base arranges gutter and sump, to prevent that rainwater from soaking foundation ditch and causing the destruction to support system;
(2) build sole plate
(1) must be ferreted out+1.0m absolute altitude control line on wall, post reinforcing bar, and draw upper red triangle with red paint and make marks, scene has level gauge, to sump absolute altitude priority control, so that levelling is at any time grasped absolute altitude dynamic;
(2), in the time building sole plate concrete in mass, take balance pouring at reserved opening, from bottom to top, vibration compacting;
(3) concrete surface makes real after rubbing and pressure with wood float, then uses plasterer's trowel press polish, ensures surperficial compactness and fineness, slows down concrete surface dehydrating speed, prevents surface checking; After the press polish of surface, after slightly due-in water, cover layer of plastic film in time at concrete surface, additional two-layer exhausted combustion straw screen or mat quilt, prevents the appearance in crack;
(3) hole, pier position is stayed and is established and waterstop setting
(1) in the time of construction of bottom plates, first on foundation pad, adopt transit setting-out to go out pile pier bit position, then to prop with the framed pile pier position opening mould plate of reserving of customization, exact position the final location of finally checking template are fixing again, accurate to ensure pier position;
(2) before sole plate is built, together with adopting with pier foundation hole seam at base plate steel plate water stopper with together with the double-deck waterproof of rubber swelling sealing rod
(3) after reserved pier position hole place form removable, residual concrete and scum silica frost on cleaning tape edge and reinforcing bar in time, carry out interface waterproof roll protection work, and interface concrete surface is picked and cuts a hole into pitted skin, have an effective adhesive when ensureing the follow-up concreting in pile pier position;
(4) pile pier foundation construction
(1) before pile foundation construction, adopt transit to carry out setting-out by design pier position, ensure that pile pier position is accurate, and guarantee that spot face position and the biased difference of design pier are not more than 5cm;
(2) before construction, establish gutter, collecting well in pier mouth surrounding, prevent that surface water from entering in hole; Dun Kou goes along with sb. to guard him than the high 30cm in ground, prevents that soil, stone, foreign material from rolling in hole and hurting sb.'s feelings; Employing interval, Wa Dun hole borehole method, influences each other while avoiding constructing, keeps the stable of the pier hole wall soil body;
(3) pier hole excavation adopts merogenesis shoveling method, artificial hand-held pneumatic pick or pick successively merogenesis excavation and retaining wall from top to bottom, and every joint cutting depth is 0.5m to 1m; In the time that rock in pier must bursting work, adopt short hole blasting method, borehole depth is no more than 0.4m at hard formation, and incompetent bed is no more than 0.8m; Explosion adopts specialized team, and near borehole, adds strong supporting, prevents shock collapse Dun Bi;
(4) while lifting means being installed, make wire rope center and the pier axially bored line position consistency of well-bucket, rough control central line during as shoveling; On every joint retaining wall, establish cross control point, ceiling hammer does center line, determines pier footpath with horizontal rod;
(5) retaining wall adopts inner bearing type template, external tooth type concrete guard wall, breast wall concrete job mix machine mix, and diesel dumper transport, steel tumbling barrel enters mould, and internal vibration rod is made firm by ramming; In breast wall concrete, mix accelerating admixture, dado template is removed after 24h; Borehole reaches after projected depth, notifies in time the department such as management, design to carry out an acceptance inspection, qualified rear rapid back cover;
(6) reinforcing cage adopts tower crane whole once to lift hand-hole in place, and when lifting, Heave Here is located at and strengthens stirrup position, hangs directly to hold up surely, aims at pier hole and slowly sinks, and avoids colliding Dun Bi, and hoisted in position deviation is not more than 5cm; The topping of cage of reinforcement, by penetrate center drilling on spiral bar, the circular C30 cement mortar bedding block of thick 5cm ensures, mortar piece is by vertically establishing together every 2m, often penetrates 6 layouts along circumference together;
(7) concrete adopts commercial concrete, concrete delivery truck transport, and with the perfusion of deceleration tumbling barrel, tumbling barrel bottom is not more than 2m with pier inner bottom part or concrete surface height; After pore-forming, pour into immediately pier shaft concrete, and the same day disposable completing; The method of taking continuous stratification perfusion, layering to vibrate, every layer of influx height must not exceed 1.5m, and the every layer of thickness that vibrates must not exceed 0.5m; It is real that concrete adopts perfusion limit, internal vibration rod limit to insert, to ensure concrete compactness; Pier top concrete is smeared and is flattened before initial set, and surface will cut to ensure to be connected well with top pier cap if any laitance layer;
(5) pier foundation waterproofing work
After pile pier place cushion construction completes, be subsidy construction waterproof roll, reinforcing bar and steel pipe adopt welding steel waterproof through base plate place, and waterproof roll paving is on waterproof steel plate, and waterproof steel plate root on steel pipe and reinforcing bar is sticked on one deck enhancement Layer.
Claims (1)
1. major diameter drilling pile pier foundation and a netted sole plate reversed construction method, is characterized in that: comprise the following steps:
(1) soil excavation
(1) soil excavation requires machinery to be once excavated to the above 20mm of back-plane design absolute altitude place, manually repaiies and digs to design elevation, carries out immediately building of bed course, waterproof roll and netted underplate concrete after check of foundation subsoil completes;
(2) carry out the drainage works that falls of foundation ditch when soil excavation, foundation ditch base arranges gutter and sump, to prevent that rainwater from soaking foundation ditch and causing the destruction to support system;
(2) build sole plate
(1) must be ferreted out+1.0m absolute altitude control line on wall, post reinforcing bar, and draw upper red triangle with red paint and make marks, scene has level gauge, to sump absolute altitude priority control, so that levelling is at any time grasped absolute altitude dynamic;
(2), in the time building sole plate concrete in mass, take balance pouring at reserved opening, from bottom to top, vibration compacting;
(3) concrete surface makes real after rubbing and pressure with wood float, then uses plasterer's trowel press polish, ensures surperficial compactness and fineness, slows down concrete surface dehydrating speed, prevents surface checking; After the press polish of surface, after slightly due-in water, cover layer of plastic film in time at concrete surface, additional two-layer exhausted combustion straw screen or mat quilt, prevents the appearance in crack;
(3) hole, pier position is stayed and is established and waterstop setting
(1) in the time of construction of bottom plates, first on foundation pad, adopt transit setting-out to go out pile pier bit position, then to prop with the framed pile pier position opening mould plate of reserving of customization, exact position the final location of finally checking template are fixing again, accurate to ensure pier position;
(2) before sole plate is built, together with adopting with pier foundation hole seam at base plate steel plate water stopper with together with the double-deck waterproof of rubber swelling sealing rod;
(3) after reserved pier position hole place form removable, residual concrete and scum silica frost on cleaning tape edge and reinforcing bar in time, carry out interface waterproof roll protection work, and interface concrete surface is picked and cuts a hole into pitted skin, have an effective adhesive when ensureing the follow-up concreting in pile pier position;
(4) pile pier foundation construction
(1) before pile foundation construction, adopt transit to carry out setting-out by design pier position, ensure that pile pier position is accurate, and guarantee that spot face position and the biased difference of design pier are not more than 5cm;
(2) before construction, establish gutter, collecting well in pier mouth surrounding, prevent that surface water from entering in hole; Dun Kou goes along with sb. to guard him than the high 30cm in ground, prevents that soil, stone, foreign material from rolling in hole and hurting sb.'s feelings; Employing interval, Wa Dun hole borehole method, influences each other while avoiding constructing, keeps the stable of the pier hole wall soil body;
(3) pier hole excavation adopts merogenesis shoveling method, artificial hand-held pneumatic pick or pick successively merogenesis excavation and retaining wall from top to bottom, and every joint cutting depth is 0.5m to 1m; In the time that rock in pier must bursting work, adopt short hole blasting method, borehole depth is no more than 0.4m at hard formation, and incompetent bed is no more than 0.8m; Explosion adopts specialized team, and near borehole, adds strong supporting, prevents shock collapse Dun Bi;
(4) while lifting means being installed, make wire rope center and the pier axially bored line position consistency of well-bucket, rough control central line during as shoveling; On every joint retaining wall, establish cross control point, ceiling hammer does center line, determines pier footpath with horizontal rod;
(5) retaining wall adopts inner bearing type template, external tooth type concrete guard wall, breast wall concrete job mix machine mix, and diesel dumper transport, steel tumbling barrel enters mould, and internal vibration rod is made firm by ramming; In breast wall concrete, mix accelerating admixture, dado template is removed after 24h; Borehole reaches after projected depth, notifies in time the department such as management, design to carry out an acceptance inspection, qualified rear rapid back cover;
(6) reinforcing cage adopts tower crane whole once to lift hand-hole in place, and when lifting, Heave Here is located at and strengthens stirrup position, hangs directly to hold up surely, aims at pier hole and slowly sinks, and avoids colliding Dun Bi, and hoisted in position deviation is not more than 5cm; The topping of cage of reinforcement, by penetrate center drilling on spiral bar, the circular C30 cement mortar bedding block of thick 5cm ensures, mortar piece is by vertically establishing together every 2m, often penetrates 6 layouts along circumference together;
(7) concrete adopts commercial concrete, concrete delivery truck transport, and with the perfusion of deceleration tumbling barrel, tumbling barrel bottom is not more than 2m with pier inner bottom part or concrete surface height; After pore-forming, pour into immediately pier shaft concrete, and the same day disposable completing; The method of taking continuous stratification perfusion, layering to vibrate, every layer of influx height must not exceed 1.5m, and the every layer of thickness that vibrates must not exceed 0.5m; It is real that concrete adopts perfusion limit, internal vibration rod limit to insert, to ensure concrete compactness; Pier top concrete is smeared and is flattened before initial set, and surface will cut to ensure to be connected well with top pier cap if any laitance layer;
(5) pier foundation waterproofing work
After pile pier place cushion construction completes, be subsidy construction waterproof roll, reinforcing bar and steel pipe adopt welding steel waterproof through base plate place, and waterproof roll paving is on waterproof steel plate, and waterproof steel plate root on steel pipe and reinforcing bar is sticked on one deck enhancement Layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310476802.5A CN103498476B (en) | 2013-10-14 | 2013-10-14 | Major-diameter hole-forming pile pier foundation and net foundation slab reverse building construction method |
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| CN201310476802.5A CN103498476B (en) | 2013-10-14 | 2013-10-14 | Major-diameter hole-forming pile pier foundation and net foundation slab reverse building construction method |
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| CN103967015B (en) * | 2014-05-21 | 2016-04-27 | 刘绍国 | A kind of water seal for deep foundation pit excavation method and structure thereof |
| CN115559299A (en) * | 2022-11-23 | 2023-01-03 | 中交第一航务工程局有限公司 | Pre-hole forming method for foundation concrete cushion pile foundation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100775767B1 (en) * | 2006-08-14 | 2007-11-12 | 깨뱉시스템주식회사 | Top-down method using the vertical steel bar for the src column |
| CN101538867A (en) * | 2009-02-25 | 2009-09-23 | 叶长青 | Long-short pile composite foundation top-down construction method |
| CN201901876U (en) * | 2010-12-23 | 2011-07-20 | 东南大学 | Steel sheet pile inversely-constructed foundation ditch supporting structure |
| CN102425184A (en) * | 2011-12-13 | 2012-04-25 | 中交第二公路工程局有限公司 | Cap preserved hole construction method for deep-water soft soil foundation reverse low pile cap composite foundation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100775767B1 (en) * | 2006-08-14 | 2007-11-12 | 깨뱉시스템주식회사 | Top-down method using the vertical steel bar for the src column |
| CN101538867A (en) * | 2009-02-25 | 2009-09-23 | 叶长青 | Long-short pile composite foundation top-down construction method |
| CN201901876U (en) * | 2010-12-23 | 2011-07-20 | 东南大学 | Steel sheet pile inversely-constructed foundation ditch supporting structure |
| CN102425184A (en) * | 2011-12-13 | 2012-04-25 | 中交第二公路工程局有限公司 | Cap preserved hole construction method for deep-water soft soil foundation reverse low pile cap composite foundation |
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Owner name: HAOJIA HENGYE CONSTRUCTION DEVELOPMENT CO., LTD. J Effective date: 20140730 Owner name: NANTONG UNIVERSITY Free format text: FORMER OWNER: CHENG JUN Effective date: 20140730 |
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