CN103510523B - Sectional cutting and overall craning method for supporting beam in deep foundation pit multilayered reinforced concrete - Google Patents
Sectional cutting and overall craning method for supporting beam in deep foundation pit multilayered reinforced concrete Download PDFInfo
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- CN103510523B CN103510523B CN201310504479.8A CN201310504479A CN103510523B CN 103510523 B CN103510523 B CN 103510523B CN 201310504479 A CN201310504479 A CN 201310504479A CN 103510523 B CN103510523 B CN 103510523B
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Abstract
The invention discloses a sectional cutting and overall craning method for a supporting beam in deep foundation pit multilayered reinforced concrete. The method comprises the steps of internal force measurement, cutting and dismantling, transferring in the foundation pit, entirely craning of the supporting beam, off-site crushing of the supporting beam and the like. The method is to construct on an underground horizontal thin slab structure without special requirement on the construction platform. A steel pipe supporting system of the underground thin slab structure is not required to be reinforced, but holes and expansion joint positions are reserved for the underground horizontal thin slab to be locally reinforced. When the supporting beam is cut off and dismantled, the steel pipe stand is not required for the lower part. The single input of the steel pipe stand material is greatly reduced on the site, and the steel pipe stand can be dismantled in advance to improve the turnover rate of the steel pipe stand.
Description
Technical field
The present invention relates to the multistory reinforced concrete inner support of a kind of deep foundation ditch beam segmentation cutting Integral lifting method.
Background technology
In recent years, be accompanied by expressway around city development, the population density increases, urban architecture is constantly towards the development of advanced two sides, highrise building becomes the theme of urban construction, corresponding multi-storey basement, subterranean tunnel, subway, the foundation that shopping street etc. are supporting, make usually contiguous highrise building or underground structure etc. of engineering yet to be built, the complexity of building surrounding enviroment is restricted the use of foundation pit anchor cable bolting system, being widely applied in recent years of " soldier pile or diaphragm wall+inner support " support system generation, especially taking reinforced concrete inner support as main, greatly improve the stability of deep foundation ditch.And along with the increase of the underground degree of depth, the number of plies of inner support also supports and is increased to Multi-layer supporting from one deck.
Conventional concrete support beam method for dismounting has gunpowder demolition blasting, mechanical removal, manual demolition etc.And as temporary support structure, because its many places are in business district, city, around or building intensive, or close on operated subway, temporary support structure is removed and must be guaranteed temporary supporting system, neighboring buildings, underground installation not to be caused to adverse effect.And when multilayer inner support beam Demolition Construction often by the underground horizontal structure of having constructed as operation platform, this just also proposes higher challenge to method for dismounting.
Summary of the invention
The object of the present invention is to provide a kind of construction period short, low to the requirement of underground horizontal permanent structure, the multistory reinforced concrete inner support of the deep foundation ditch beam segmentation cutting Integral lifting method that construction cost is low.
Technical solution of the present invention is:
The multistory reinforced concrete inner support of a kind of deep foundation ditch beam segmentation cutting Integral lifting method, is characterized in that: comprise the following steps:
(1) Internal Force Monitoring
Removing before inner supporting structure and carrying out Internal Force Monitoring in whole demolishing process, be first the Internal Force Monitoring to foundation ditch displacement and inner support beam, draw internal force distribution situation according to testing result, when off-load according to the even off-load of internal force distribution situation;
In demolishing process, emphasis monitoring is carried out in following position:
(1) the outer water table measure in hole: adopt steel ruler water-level gauge to monitor at the water level observation well of arranging in advance;
(2) Ground Subsidence Monitoring: with level gauge, scale is monitored on the basic point arranging, deducting last time absolute altitude with this monitoring absolute altitude be this settling amount, deducts initial absolute altitude for settling amount totally;
(3) the sedimentation of soldier pile stake top and horizontal displacement monitoring: on soldier pile top, measuring point is set, away from foundation ditch position, reference point is being set, monitor with level gauge and scale;
(4) soldier pile deep horizontal displacement monitoring: with inclinometer, longitudinal guide groove that pre-buried inclinometer pipe inwall has two group 90 to spend, guide groove control deviational survey orientation, when test, at the bottom of clinometer probe is sink to hole, after temperature stabilization, measures displacement from bottom to top piecemeal;
(5) inner support axle power monitoring: concrete strain meter is embedded in to inner support beam steel gap location, fixes and carefully draw with cable afterwards, be placed in the line box of well in advance, monitor with frequency readings instrument;
(6) support post stake settlement monitoring: monitor on the basic point of stand column pile setting with level gauge;
(7) the internal force of guard post monitoring: reinforcing rib meter is welded on and carries out pre-buriedly on the main muscle of boring soldier pile, monitor with frequency readings instrument;
(8) surrounding building sedimentation deformation monitoring: monitor on the basic point setting with level gauge;
(2) cutting disassembling
Cutting off-load
With rope saw cutting machine will in support system, contact beam, girder cut off off-load, two groups of symmetrical operations simultaneously, the smooth transition of holding structure support replacement;
Cutting disassembling
(1) according to brace summer dismounting order, on brace summer to be torn open, finish line of cut;
(2) flat car is installed and with the type wood of the carving piece fixing vehicle wheel of stopping in brace summer below; As rectangular structure has reserving hole, adopt steel structure platform plate to lay;
(3) static line saw: fix rope saw facing brace summer line of cut position, rope saw and brace summer to be torn open are in vertical state;
(4) rope is installed: diamond rope is wrapped on driving wheel and auxiliary wheel, and the line of cut position of finishing winds, debugging rope saw and diamond rope, tighten up diamond rope on brace summer;
(5) cutting unloading: before cutting, diamond-wire saw is carried out to preliminary operation and idle running, determine in equipment operation, the normal situation of water source supply, then cut; Adopt symmetric mode to cut unloading to brace summer;
(6) cutting section brace summer in the situation that the every data monitoring of foundation ditch being stable after foundation ditch bearing stress discharges;
(3) transhipment in foundation ditch
(1) lay at underground horizontal permanent structure weak part the steel structure platform having completed, guarantee flat car by time structural weak position be not subject to load to produce crack;
(2) at foundation pit side-wall wire rope hoist, and at the fixing angle pulley of transit route bending part;
(3), after brace summer has cut, brace summer cutting section falls within on flat car reposefully, split out for the type of the carving wood of the fixed flat planar car piece of stopping, with hoist engine horizontally tracting flat car to loop wheel machine lifting radius;
(4) brace summer Integral lifting
(1) lifting loop wheel machine is set up in the side that can set up loop wheel machine at foundation pit side-wall;
(2) adopt wire rope colligation to fix the brace summer cut length being transported in foundation ditch limit lifting radius;
(3) loop wheel machine brace summer cut length adopts wire rope handling to foundation ditch, on haulage vehicle, to transport building site;
(5) brace summer is broken outside the venue
Brace summer cut length is transported to be avoided near assigned address outside the concentrated place in residential block and center, city; Adopt measurements for reduction Convergency fracturing at assigned address.
The present invention constructs on underground horizontal thin-slab structure, and operation platform is not had to particular/special requirement, does not need lower thin sheet structured steel pipe support system over the ground to strengthen processing, and only needs underground horizontal thin plate reserved opening and position, reserved shrinkage joint to carry out part reinforcement processing.And when brace summer cutting disassembling, bottom does not need to set up steel pipe support.Input amount of on-the-spot steel pipe support material reduces in a large number, and can remove in advance and improve steel pipe support turnover rate.Brace summer adopts rope saw segmentation cutting mode, the structural cracks of avoiding heavy-duty machinery and dismantling concrete slag to cause horizontal structure overburden, and the effective load of controlling each cut length of segmentation cutting affects horizontal structure.Part is laid the weak part of steel platform level of protection structure simultaneously, guaranteed the quality control at each position of horizontal structure.Brace summer segmentation cutting; adopt self-control flat car be transported to can handling margin of foundation pit; reduce foundation ditch side lift lifting radius and loop wheel machine shift count, and ensure the brace summer cutting at the position that loop wheel machine cannot be close, thereby guarantee that foundation ditch limit can set up little tonnage loop wheel machine and ensure foundation ditch safety and stability.Brace summer adopts Integral lifting mode, greatly shortens the concrete slag clearance time that the brace summer in foundation ditch is removed, and foundation ditch side lift only does flowing water lifting operation, quickening construction rhythm, saving duration.Brace summer segmentation cutting has reduced labour intensity, and handling safety is reliable, and powerful has improved cutting power and labor productivity.Work progress noise is low, without dust, environmental protection easy and simple to handle.
Below in conjunction with embodiment, the invention will be further described.
Detailed description of the invention
The multistory reinforced concrete inner support of a kind of deep foundation ditch beam segmentation cutting Integral lifting method, is characterized in that: comprise the following steps:
(1) Internal Force Monitoring
Removing before inner supporting structure and carrying out Internal Force Monitoring in whole demolishing process, be first the Internal Force Monitoring to foundation ditch displacement and inner support beam, draw internal force distribution situation according to testing result, when off-load according to the even off-load of internal force distribution situation;
In demolishing process, emphasis monitoring is carried out in following position:
(1) the outer water table measure in hole: adopt steel ruler water-level gauge to monitor at the water level observation well of arranging in advance;
(2) Ground Subsidence Monitoring: with level gauge, scale is monitored on the basic point arranging, deducting last time absolute altitude with this monitoring absolute altitude be this settling amount, deducts initial absolute altitude for settling amount totally;
(3) the sedimentation of soldier pile stake top and horizontal displacement monitoring: on soldier pile top, measuring point is set, away from foundation ditch position, reference point is being set, monitor with level gauge and scale;
(4) soldier pile deep horizontal displacement monitoring: with inclinometer, longitudinal guide groove that pre-buried inclinometer pipe inwall has two group 90 to spend, guide groove control deviational survey orientation, when test, at the bottom of clinometer probe is sink to hole, after temperature stabilization, measures displacement from bottom to top piecemeal;
(5) inner support axle power monitoring: concrete strain meter is embedded in to inner support beam steel gap location, fixes and carefully draw with cable afterwards, be placed in the line box of well in advance, monitor with frequency readings instrument;
(6) support post stake settlement monitoring: monitor on the basic point of stand column pile setting with level gauge;
(7) the internal force of guard post monitoring: reinforcing rib meter is welded on and carries out pre-buriedly on the main muscle of boring soldier pile, monitor with frequency readings instrument;
(8) surrounding building sedimentation deformation monitoring: monitor on the basic point setting with level gauge;
(2) cutting disassembling
Cutting off-load
With rope saw cutting machine will in support system, contact beam, girder cut off off-load, two groups of symmetrical operations simultaneously, the smooth transition of holding structure support replacement;
Cutting disassembling
(1) according to brace summer dismounting order, on brace summer to be torn open, finish line of cut;
(2) flat car is installed and with the type wood of the carving piece fixing vehicle wheel of stopping in brace summer below; As rectangular structure has reserving hole, adopt steel structure platform plate to lay;
(3) static line saw: fix rope saw facing brace summer line of cut position, rope saw and brace summer to be torn open are in vertical state;
(4) rope is installed: diamond rope is wrapped on driving wheel and auxiliary wheel, and the line of cut position of finishing winds, debugging rope saw and diamond rope, tighten up diamond rope on brace summer;
(5) cutting unloading: before cutting, diamond-wire saw is carried out to preliminary operation and idle running, determine in equipment operation, the normal situation of water source supply, then cut; Adopt symmetric mode to cut unloading to brace summer;
(6) cutting section brace summer in the situation that the every data monitoring of foundation ditch being stable after foundation ditch bearing stress discharges;
(3) transhipment in foundation ditch
(1) lay at underground horizontal permanent structure weak part the steel structure platform having completed, guarantee flat car by time structural weak position be not subject to load to produce crack;
(2) at foundation pit side-wall wire rope hoist, and at the fixing angle pulley of transit route bending part;
(3), after brace summer has cut, brace summer cutting section falls within on flat car reposefully, split out for the type of the carving wood of the fixed flat planar car piece of stopping, with hoist engine horizontally tracting flat car to loop wheel machine lifting radius;
(4) brace summer Integral lifting
(1) lifting loop wheel machine is set up in the side that can set up loop wheel machine at foundation pit side-wall;
(2) adopt wire rope colligation to fix the brace summer cut length being transported in foundation ditch limit lifting radius;
(3) loop wheel machine brace summer cut length adopts wire rope handling to foundation ditch, on haulage vehicle, to transport building site;
(5) brace summer is broken outside the venue
Brace summer cut length is transported to be avoided near assigned address outside the concentrated place in residential block and center, city; Adopt measurements for reduction Convergency fracturing at assigned address.
Claims (1)
1. the multistory reinforced concrete inner support of a deep foundation ditch beam segmentation cutting Integral lifting method, is characterized in that: comprise the following steps:
(1) Internal Force Monitoring
Removing before inner supporting structure and carrying out Internal Force Monitoring in whole demolishing process, be first the Internal Force Monitoring to foundation ditch displacement and inner support beam, draw internal force distribution situation according to testing result, when off-load according to the even off-load of internal force distribution situation;
In demolishing process, emphasis monitoring is carried out in following position:
(1) the outer water table measure in hole: adopt steel ruler water-level gauge to monitor at the water level observation well of arranging in advance;
(2) Ground Subsidence Monitoring: with level gauge, scale is monitored on the basic point arranging, deducting last time absolute altitude with this monitoring absolute altitude be this settling amount, deducts initial absolute altitude for settling amount totally;
(3) the sedimentation of soldier pile stake top and horizontal displacement monitoring: on soldier pile top, measuring point is set, away from foundation ditch position, reference point is being set, monitor with level gauge and scale;
(4) soldier pile deep horizontal displacement monitoring: with inclinometer, longitudinal guide groove that pre-buried inclinometer pipe inwall has two group 90 to spend, guide groove control deviational survey orientation, when test, at the bottom of clinometer probe is sink to hole, after temperature stabilization, measures displacement from bottom to top piecemeal;
(5) inner support axle power monitoring: concrete strain meter is embedded in to inner support beam steel gap location, fixes and carefully draw with cable afterwards, be placed in the line box of well in advance, monitor with frequency readings instrument;
(6) support post stake settlement monitoring: monitor on the basic point of stand column pile setting with level gauge;
(7) the internal force of guard post monitoring: reinforcing rib meter is welded on and carries out pre-buriedly on the main muscle of boring soldier pile, monitor with frequency readings instrument;
(8) surrounding building sedimentation deformation monitoring: monitor on the basic point setting with level gauge;
(2) cutting disassembling
Cutting off-load
With rope saw cutting machine will in support system, contact beam, girder cut off off-load, two groups of symmetrical operations simultaneously, the smooth transition of holding structure support replacement;
Cutting disassembling
(1) according to brace summer dismounting order, on brace summer to be torn open, finish line of cut;
(2) flat car is installed and with the type wood of the carving piece fixing vehicle wheel of stopping in brace summer below; As rectangular structure has reserving hole, adopt steel structure platform plate to lay;
(3) static line saw: fix rope saw facing brace summer line of cut position, rope saw and brace summer to be torn open are in vertical state;
(4) rope is installed: diamond rope is wrapped on driving wheel and auxiliary wheel, and the line of cut position of finishing winds, debugging rope saw and diamond rope, tighten up diamond rope on brace summer;
(5) cutting unloading: before cutting, diamond-wire saw is carried out to preliminary operation and idle running, determine in equipment operation, the normal situation of water source supply, then cut; Adopt symmetric mode to cut unloading to brace summer;
(6) cutting section brace summer in the situation that the every data monitoring of foundation ditch being stable after foundation ditch bearing stress discharges;
(3) transhipment in foundation ditch
(1) lay at underground horizontal permanent structure weak part the steel structure platform having completed, guarantee flat car by time structural weak position be not subject to load to produce crack;
(2) at foundation pit side-wall wire rope hoist, and at the fixing angle pulley of transit route bending part;
(3), after brace summer has cut, brace summer cutting section falls within on flat car reposefully, split out for the type of the carving wood of the fixed flat planar car piece of stopping, with hoist engine horizontally tracting flat car to loop wheel machine lifting radius;
(4) brace summer Integral lifting
(1) lifting loop wheel machine is set up in the side that can set up loop wheel machine at foundation pit side-wall;
(2) adopt wire rope colligation to fix the brace summer cut length being transported in foundation ditch limit lifting radius;
(3) brace summer cut length adopts wire rope handling to foundation ditch, on haulage vehicle, to transport building site;
(5) brace summer is broken outside the venue
Brace summer cut length is transported to be avoided near assigned address outside the concentrated place in residential block and center, city; Adopt measurements for reduction Convergency fracturing at assigned address.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310504479.8A CN103510523B (en) | 2013-10-24 | 2013-10-24 | Sectional cutting and overall craning method for supporting beam in deep foundation pit multilayered reinforced concrete |
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| CN201310504479.8A CN103510523B (en) | 2013-10-24 | 2013-10-24 | Sectional cutting and overall craning method for supporting beam in deep foundation pit multilayered reinforced concrete |
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| CN103510523B true CN103510523B (en) | 2014-10-29 |
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Families Citing this family (19)
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| CN104404968B (en) * | 2014-12-10 | 2016-05-25 | 中建三局第一建设工程有限责任公司 | Foundation ditch inner support beam detaching device and foundation ditch inner support beam method for dismounting |
| CN105220894B (en) * | 2015-11-16 | 2016-08-17 | 中国华西企业有限公司 | Inner support rope saws lossless cutting disassembling structure and construction thereof |
| CN105569377A (en) * | 2016-02-29 | 2016-05-11 | 上海建工五建集团有限公司 | Method for demounting reinforced concrete supporting beam |
| CN105783618B (en) * | 2016-03-18 | 2018-07-13 | 中国水利水电第十一工程局有限公司 | Bank demolition blasting construction method drops in defrlector bucket |
| CN106337419A (en) * | 2016-08-26 | 2017-01-18 | 中国十七冶集团有限公司 | Deep foundation pit reinforced concrete inner supporting fast disassembly device |
| CN106894421A (en) * | 2017-01-19 | 2017-06-27 | 中国建筑第八工程局有限公司 | The method for dismounting of internal support of foundation pit beam |
| CN108166500A (en) * | 2017-12-12 | 2018-06-15 | 武汉科技大学 | A kind of cutting disassembling of deep foundation ditch concrete near a river and recovery method |
| CN109989406B (en) * | 2017-12-30 | 2020-10-20 | 广州协安建设工程有限公司 | Foundation pit support replacing construction method |
| CN108612109B (en) * | 2018-04-27 | 2020-12-01 | 中国二十冶集团有限公司 | Bracket-free dismantling method for concrete support beam |
| CN108824842A (en) * | 2018-05-29 | 2018-11-16 | 五冶集团上海有限公司 | A kind of desulfurizing tower method for dismounting |
| CN109056741B (en) * | 2018-08-17 | 2020-08-11 | 江苏东合南岩土科技股份有限公司 | Method for dismantling lower steel support in multi-layer steel support |
| CN109056742A (en) * | 2018-08-23 | 2018-12-21 | 中国水利水电第八工程局有限公司 | The construction method of hydraulic lifting bearing platform assist removal reinforced concrete brace |
| CN109356167B (en) * | 2018-11-22 | 2020-11-10 | 深圳市福田建安建设集团有限公司 | Deep foundation pit support dismantling system and construction method |
| CN109505307A (en) * | 2018-11-30 | 2019-03-22 | 上海宝冶集团有限公司 | Supporting construction support replacement and method for dismounting for large-scale BOX foundation construction |
| CN109723062A (en) * | 2019-01-18 | 2019-05-07 | 济南轨道交通集团有限公司 | Heave-load device hanging apparatus and hanging method based on proximity deep foundation pit construction environment |
| CN111531722A (en) * | 2020-05-28 | 2020-08-14 | 广州市黄埔建筑工程总公司 | Method for cutting and dismantling supporting beam of foundation pit support by using wire saw |
| CN112343064A (en) * | 2020-11-27 | 2021-02-09 | 中铁七局集团第五工程有限公司 | Construction method for dismantling large-section annular concrete support beam of deep foundation pit |
| CN113654423B (en) * | 2021-08-31 | 2023-09-22 | 湖北工业大学 | Green demolition method for mechanical cutting and remote blasting of pre-buried holes of reinforced concrete beam and column |
| CN115506371A (en) * | 2022-10-28 | 2022-12-23 | 中建一局集团建设发展有限公司 | Construction method for dismantling ultrahigh inner support of deep foundation pit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CH700374B1 (en) * | 2009-02-10 | 2012-11-30 | Betag Betontaglio Sa | Seilsägeeinheit and method for operating such Seilsägeeinheit. |
| WO2011107818A1 (en) * | 2010-03-01 | 2011-09-09 | Bouygues Travaux Publics | Method of cutting foundation elements in the ground |
| CN203113351U (en) * | 2013-03-08 | 2013-08-07 | 中国建筑第四工程局有限公司 | Structure for detaching support in foundation pit rapidly and conveniently |
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