CN103147450A - Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit - Google Patents
Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit Download PDFInfo
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- CN103147450A CN103147450A CN2013100876637A CN201310087663A CN103147450A CN 103147450 A CN103147450 A CN 103147450A CN 2013100876637 A CN2013100876637 A CN 2013100876637A CN 201310087663 A CN201310087663 A CN 201310087663A CN 103147450 A CN103147450 A CN 103147450A
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Abstract
The invention discloses a construction method for plugging a partial steel pipe dewatering well by using flange plates for the excavation of a deep foundation pit. The method comprises the steps of dewatering well construction, foundation construction, dewatering well plugging and the like. The method is convenient to construct and safe, and has a good construction effect.
Description
Technical field
The present invention relates to the local steel pipe downcast well plugging construction method of a kind of deep foundation ditch.
Background technology
The local steel pipe downcast well plugging construction of existing deep foundation ditch is complicated, have defective in inventions such as security performance, construction effects, requires further improvement.
Summary of the invention
The object of the present invention is to provide the local steel pipe downcast well flange plate of the good deep foundation ditch of a kind of easy construction, safety, construction effect method plugging construction method.
Technical solution of the present invention is:
The local steel pipe downcast well flange plate of a kind of deep foundation ditch method plugging construction method is characterized in that: comprise the following steps:
(1) dewatering well construction:
(1) well location unwrapping wire: emit the center, well point by the precipitation design, find out the underground obstacle situation, avoid simultaneously the structures such as basis;
(2) bury casing underground: in boring procedure, circulating water flow bursts the aperture backfill in order to avoid, need bury before boring that 2m grows, external diameter is the steel casing of 1m underground, and tamp outside casing with straw bag dress clay, casing is laid smooth, and the central point of steel casing is the dewatering well central point;
(3) stock tank of dredging: digging a volume before boring is 8-10m
3Mud pit, for preventing the running pulp spillage, mud pit clay filling, and use the Polypropylence Sheet substrate;
(4) rig is in place: for preventing hole deviation, adjust the planeness of rig and the verticality of boring tower with spirit level when rig is in place, and real with the board headblock, the deviation of rig contraposition is answered＜20mm;
(5) change slurry: creep into dark to design after, drill bit is improved 50cm, then continue anti-circulating picture-changing slurry with clear water, to being till 20 seconds to mud viscosity;
(6) lower pipe: note by designing requirement looping nylon gauze during lower pipe, well casing interface Polypropylence Sheet Bao Yan is in case filtrate or stratum powder fine sand bleed in well; Filter pipe partly twines 60 order nylon gauzes; Between well casing and the borehole wall, bottom 5m fills out φ 2-4mm gravel material, and clay ball is filled out on top;
(7) well-flushing: use the pressure fan well-flushing, annotate clear water in case of necessity in well, every well is with till washing water sand removal to the greatest extent, and installation pump draws water;
(2) foundation construction
(1) the thick particle diameter 35mm of backfill 20cm rubble as pervious layer, is done one thick plastic sheeting of paving as water barrier on stone in well, makes water see through stone as far as possible under film and flows in well;
(2) the Φ 150mm steel pipe and the Ф 600mm dewatering well that before bed course is poured into a mould, an end are welded steel plate for sealing water join;
(3) because groundwater table is high, the mat surface high humidity carries out back cover with cement-based capillary crystalline waterproof coating to mat surface;
(4) along steel tube well length direction welding 3 road steel plate water-stopping rings, the thick 4mm of steel plate, guarantee that the tight and steel tube well of welding is welded and fixed, elimination water is along the steel tube well outer wall liter of upwards lying prone; Carry out the construction of sole plate reinforcement construction and sole plate concrete;
(3) plugging dewatering well
(1) underground structure is completed, backfill cuts off the water after completing, place immediately air bag after cutting off the water to cheating 〉=the 300mm position at the end, to airbag aeration, make air bag be full of whole steel tube well inwall, hinder in this well water level by this kind method air bag and rise, air bag top residual water is cleaned out;
(2) carry out immediately slip casing by pressure after air bag places; The slip casting plain-water slurry, water/binder ratio 0.5:1 carries out slip casing by pressure to the pipe top, if do not reach plane, well head top after slip casting, after closing ball valve, then with the fine-stone concrete concrete, well head is filled up; Steel pipe top is tightened with flange.
Easy construction of the present invention, safety, construction effect are good.
The invention will be further described below in conjunction with embodiment.
The specific embodiment
The local steel pipe downcast well flange plate of a kind of deep foundation ditch method plugging construction method comprises the following steps:
(1) dewatering well construction:
(1) well location unwrapping wire: emit the center, well point by the precipitation design, find out the underground obstacle situation, avoid simultaneously the structures such as basis;
(2) bury casing underground: in boring procedure, circulating water flow bursts the aperture backfill in order to avoid, need bury before boring that 2m grows, external diameter is the steel casing of 1m underground, and tamp outside casing with straw bag dress clay, casing is laid smooth, and the central point of steel casing is the dewatering well central point;
(3) stock tank of dredging: digging a volume before boring is 8-10m
3Mud pit, for preventing the running pulp spillage, mud pit clay filling, and use the Polypropylence Sheet substrate;
(4) rig is in place: for preventing hole deviation, adjust the planeness of rig and the verticality of boring tower with spirit level when rig is in place, and real with the board headblock, the deviation of rig contraposition is answered＜20mm;
(5) change slurry: creep into dark to design after, drill bit is improved 50cm, then continue anti-circulating picture-changing slurry with clear water, to being till 20 seconds to mud viscosity;
(6) lower pipe: note by designing requirement looping nylon gauze during lower pipe, well casing interface Polypropylence Sheet Bao Yan is in case filtrate or stratum powder fine sand bleed in well; Filter pipe partly twines 60 order nylon gauzes; Between well casing and the borehole wall, bottom 5m fills out φ 2-4mm gravel material, and clay ball is filled out on top;
(7) well-flushing: use the pressure fan well-flushing, annotate clear water in case of necessity in well, every well is with till washing water sand removal to the greatest extent, and installation pump draws water;
(2) foundation construction
(1) the thick particle diameter 35mm of backfill 20cm rubble as pervious layer, is done one thick plastic sheeting of paving as water barrier on stone in well, makes water see through stone as far as possible under film and flows in well;
(2) the Φ 150mm steel pipe and the Ф 600mm dewatering well that before bed course is poured into a mould, an end are welded steel plate for sealing water join;
(3) because groundwater table is high, the mat surface high humidity carries out back cover with cement-based capillary crystalline waterproof coating to mat surface;
(4) along steel tube well length direction welding 3 road steel plate water-stopping rings, the thick 4mm of steel plate, guarantee that the tight and steel tube well of welding is welded and fixed, elimination water is along the steel tube well outer wall liter of upwards lying prone; Carry out the construction of sole plate reinforcement construction and sole plate concrete;
(3) plugging dewatering well
(1) underground structure is completed, backfill cuts off the water after completing, place immediately air bag after cutting off the water to cheating 〉=the 300mm position at the end, to airbag aeration, make air bag be full of whole steel tube well inwall, hinder in this well water level by this kind method air bag and rise, air bag top residual water is cleaned out;
(2) carry out immediately slip casing by pressure after air bag places; The slip casting plain-water slurry, water/binder ratio 0.5:1 carries out slip casing by pressure to the pipe top, if do not reach plane, well head top after slip casting, after closing ball valve, then with the fine-stone concrete concrete, well head is filled up; Steel pipe top is tightened with flange.
Claims (1)
1. the local steel pipe downcast well flange plate of a deep foundation ditch method plugging construction method, is characterized in that: comprise the following steps:
(1) dewatering well construction:
(1) well location unwrapping wire: emit the center, well point by the precipitation design, find out the underground obstacle situation, avoid simultaneously the structures such as basis;
(2) bury casing underground: in boring procedure, circulating water flow bursts the aperture backfill in order to avoid, need bury before boring that 2m grows, external diameter is the steel casing of 1m underground, and tamp outside casing with straw bag dress clay, casing is laid smooth, and the central point of steel casing is the dewatering well central point;
(3) stock tank of dredging: digging a volume before boring is 8-10m
3Mud pit, for preventing the running pulp spillage, mud pit clay filling, and use the Polypropylence Sheet substrate;
(4) rig is in place: for preventing hole deviation, adjust the planeness of rig and the verticality of boring tower with spirit level when rig is in place, and real with the board headblock, the deviation of rig contraposition is answered＜20mm;
(5) change slurry: creep into dark to design after, drill bit is improved 50cm, then continue anti-circulating picture-changing slurry with clear water, to being till 20 seconds to mud viscosity;
(6) lower pipe: note by designing requirement looping nylon gauze during lower pipe, well casing interface Polypropylence Sheet Bao Yan is in case filtrate or stratum powder fine sand bleed in well; Filter pipe partly twines 60 order nylon gauzes; Between well casing and the borehole wall, bottom 5m fills out φ 2-4mm gravel material, and clay ball is filled out on top;
(7) well-flushing: use the pressure fan well-flushing, annotate clear water in case of necessity in well, every well is with till washing water sand removal to the greatest extent, and installation pump draws water;
(2) foundation construction
(1) the thick particle diameter 35mm of backfill 20cm rubble as pervious layer, is done one thick plastic sheeting of paving as water barrier on stone in well, makes water see through stone as far as possible under film and flows in well;
(2) the Φ 150mm steel pipe and the Ф 600mm dewatering well that before bed course is poured into a mould, an end are welded steel plate for sealing water join;
(3) because groundwater table is high, the mat surface high humidity carries out back cover with cement-based capillary crystalline waterproof coating to mat surface;
(4) along steel tube well length direction welding 3 road steel plate water-stopping rings, the thick 4mm of steel plate, guarantee that the tight and steel tube well of welding is welded and fixed, elimination water is along the steel tube well outer wall liter of upwards lying prone; Carry out the construction of sole plate reinforcement construction and sole plate concrete;
(3) plugging dewatering well
(1) underground structure is completed, backfill cuts off the water after completing, place immediately air bag after cutting off the water to cheating 〉=the 300mm position at the end, to airbag aeration, make air bag be full of whole steel tube well inwall, hinder in this well water level by this kind method air bag and rise, air bag top residual water is cleaned out;
(2) carry out immediately slip casing by pressure after air bag places; The slip casting plain-water slurry, water/binder ratio 0.5:1 carries out slip casing by pressure to the pipe top, if do not reach plane, well head top after slip casting, after closing ball valve, then with the fine-stone concrete concrete, well head is filled up; Steel pipe top is tightened with flange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100876637A CN103147450A (en) | 2013-03-19 | 2013-03-19 | Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit |
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| CN2013100876637A CN103147450A (en) | 2013-03-19 | 2013-03-19 | Construction method for plugging partial steel pipe dewatering well by using flange plates for excavation of deep foundation pit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563144A (en) * | 2014-12-04 | 2015-04-29 | 成都迅德科技有限公司 | Plugging structure |
| CN108316950A (en) * | 2018-03-18 | 2018-07-24 | 中铁十九局集团第三工程有限公司 | Tunnel vault concrete belt mould backfills filling system and its grouting method |
| CN109723384A (en) * | 2019-01-29 | 2019-05-07 | 中国建筑第七工程局有限公司 | With pipe at well dewatering construction engineering method |
| CN110093941A (en) * | 2019-04-25 | 2019-08-06 | 中铁十二局集团有限公司 | Deep foundation pit precipitation construction method |
| CN110886307A (en) * | 2019-11-08 | 2020-03-17 | 济南轨道交通集团有限公司 | Pipe well backfill method based on protection of karst water channel |
| CN111980045A (en) * | 2020-08-06 | 2020-11-24 | 广州协安建设工程有限公司 | Foundation pit continuous dewatering construction method for foundation anti-floating |
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| JP2002206232A (en) * | 2001-01-10 | 2002-07-26 | Shimizu Corp | Groundwater drainage well and execution method therefor |
| CN101294393A (en) * | 2007-04-29 | 2008-10-29 | 上海市第七建筑有限公司 | Construction method with dewatering water well equipped outside of foundation pit |
| CN101363228A (en) * | 2008-05-23 | 2009-02-11 | 上海广联建设发展有限公司 | Tube well for simultaneously dewatering and decompressing and technology thereof |
| CN201326176Y (en) * | 2008-12-15 | 2009-10-14 | 上海市第二建筑有限公司 | Deep foundation pit dewatering retention well |
| CN101736732A (en) * | 2009-12-17 | 2010-06-16 | 上海隧道工程股份有限公司 | Pressure and water reduction construction method of ultra-deep foundation pit confined water |
| CN101748742A (en) * | 2008-12-04 | 2010-06-23 | 上海市基础工程公司 | Dual-plugging construction method of concrete and flange for depressurization well |
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| CN202124865U (en) * | 2011-06-22 | 2012-01-25 | 南通海洲建设集团有限公司 | Quick plugging device for dewatering wellhead of sand-free cement pipe deep well |
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2013
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| CN101294393A (en) * | 2007-04-29 | 2008-10-29 | 上海市第七建筑有限公司 | Construction method with dewatering water well equipped outside of foundation pit |
| CN101363228A (en) * | 2008-05-23 | 2009-02-11 | 上海广联建设发展有限公司 | Tube well for simultaneously dewatering and decompressing and technology thereof |
| CN101748742A (en) * | 2008-12-04 | 2010-06-23 | 上海市基础工程公司 | Dual-plugging construction method of concrete and flange for depressurization well |
| CN201326176Y (en) * | 2008-12-15 | 2009-10-14 | 上海市第二建筑有限公司 | Deep foundation pit dewatering retention well |
| CN101736732A (en) * | 2009-12-17 | 2010-06-16 | 上海隧道工程股份有限公司 | Pressure and water reduction construction method of ultra-deep foundation pit confined water |
| CN101768976A (en) * | 2009-12-29 | 2010-07-07 | 中建城市建设发展有限公司 | Base pit dewatering and water saving device and construction method thereof |
| CN202124865U (en) * | 2011-06-22 | 2012-01-25 | 南通海洲建设集团有限公司 | Quick plugging device for dewatering wellhead of sand-free cement pipe deep well |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563144A (en) * | 2014-12-04 | 2015-04-29 | 成都迅德科技有限公司 | Plugging structure |
| CN108316950A (en) * | 2018-03-18 | 2018-07-24 | 中铁十九局集团第三工程有限公司 | Tunnel vault concrete belt mould backfills filling system and its grouting method |
| CN109723384A (en) * | 2019-01-29 | 2019-05-07 | 中国建筑第七工程局有限公司 | With pipe at well dewatering construction engineering method |
| CN110093941A (en) * | 2019-04-25 | 2019-08-06 | 中铁十二局集团有限公司 | Deep foundation pit precipitation construction method |
| CN110886307A (en) * | 2019-11-08 | 2020-03-17 | 济南轨道交通集团有限公司 | Pipe well backfill method based on protection of karst water channel |
| CN110886307B (en) * | 2019-11-08 | 2021-06-29 | 济南轨道交通集团有限公司 | Pipe well backfill method based on protection of karst water channel |
| CN111980045A (en) * | 2020-08-06 | 2020-11-24 | 广州协安建设工程有限公司 | Foundation pit continuous dewatering construction method for foundation anti-floating |
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Application publication date: 20130612 |