CN1948633A - Tray type excarvating contrary construction method - Google Patents
Tray type excarvating contrary construction method Download PDFInfo
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- CN1948633A CN1948633A CN 200510030565 CN200510030565A CN1948633A CN 1948633 A CN1948633 A CN 1948633A CN 200510030565 CN200510030565 CN 200510030565 CN 200510030565 A CN200510030565 A CN 200510030565A CN 1948633 A CN1948633 A CN 1948633A
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Abstract
This invention provides a basin excavation inverse method. Its major construction step is the open excavation in retaining structure edge at the first step , and digs a kind of pot-style structure, and pour the top layer concrete of underground structure, and provides dug holes; then excavates in another way, it is a pot of architecture, and pours the top structure concrete of the underground two-story, and allows dug holes; following mining, and pouring the top three underground structure plate and the top four floors underground structure ; the bottom of base plate structure is divided into two parts ;it excavates scope of the bottom floor firstly, the pit digs to the bottom, pouring concrete, then the envelope around 6 ~ 10 meters pumps the excavation. This construction method is suitable for the large pit area, depth deeper large-scale construction projects, as it constructs conveniently, saves manpower and resources to improve the progress of the project, and shortens the construction periods.
Description
Technical field
The present invention relates to the underground structure tray type excarvating contrary construction method of civil construction industry.
Background technology
The contrary sequence method that is risen the eighties in 20th century be exactly around to go along with sb. to guard him be after diaphragm wall is carried out, excavate one section earthwork downwards, adopt false bracket method that this section carried out building of concrete structure then, carry out job practices more successively downwards until the bottom.In top-down work progress, because native face is mild, the native face absolute altitude under the structure is general to be consistent with structure beam slab bottom surface, promptly utilizes the mode of native fetal membrane each layer structure of constructing, and need not to install the framed bent support.
This traditional job practices generally is used for building construction more, and the basement floor height is generally not high, and the foundation ditch area is less, generally at 6000m
2About, when constructing, at first will be according to the construct layout at hole of the structural layout characteristics of the building first floor, general hole is less, and quantity is also less, and this has just caused the distance between the hole bigger, be about 60～70m, therefore underground cubic metre of earth excavation amount is bigger in the work progress, and secondary transportation by lighter engineering quantity is also bigger, and programming is slow.And this excavation structure is unfavorable for natural ventilation, generally speaking, needs to use a plurality of exhaust blowers, and to set up special-purpose ventilation system, this has just reduced limited construction area more, has not only wasted cost, and has brought very big inconvenience to whole construction course.
So bigger for the foundation ditch area, the degree of depth is darker, and high to Deformation control and architecture quality requirement, the engineering that floor height changes greatly, unearthed rate request is fast, the construction speed requirement is tight, traditional top-down method construction process can not be suitable for.
Summary of the invention
The objective of the invention is at the deficiency in the existing top-down construction method, a kind of tray type excarvating contrary construction method is provided, this job practices has overcome the deficiency of existing construction technology, it is big relatively to be suitable for the foundation ditch area, and the large-scale construction engineering that the degree of depth is darker especially is fit to the construction on large-scale square, because easy construction, use manpower and material resources sparingly, improved the progress of engineering, shortened the duration.
Tray type excarvating contrary construction method provided by the present invention, its basic step is as follows:
A., space enclosing structure is set around the place of needs construction and encloses purlin, and set steel post;
B. soil excavation for the first time: begin cubic metre of earth open cut for the first time from the space enclosing structure edge, dig out a benzvalene form structure, on the soil layer face, lay bed course, build B1 top level structure concrete then, and on the top level structure face, reserve the hole of shoveling, wherein basin top bedding plane conforms to the length of the accurate steel pipe of a deadline for accepting bid with distance between at the bottom of the B1 top level structure plate, leave the wide soil body of 8～10m between basin limit and the space enclosing structure, push up at the bottom of basin from basin and to put into step-like slope in 1: 2 ratio, the basin height is 3.3m;
C. soil excavation for the second time: according to the hole reserve position on the B1 top level structure face of design, carry out cubic metre of earth tunneling second time, excavate out the benzvalene form structure, on the soil layer face, lay bed course, build underground two layers of top level structure concrete then, and reserve the hole of fetching earth, wherein basin top bedding plane conforms to the length of the accurate steel pipe of a deadline for accepting bid with distance between at the bottom of underground two layers of top level structure plate, stay the wide soil body of 8～10m between basin limit and the space enclosing structure, push up at the bottom of basin from basin and to put into step-like slope in 1: 2 ratio, the basin height is 3.3m;
D. there is the method according to step c of 3～4 layers of basement structure to construct successively, builds F3/B3 top level structure plate and underground four layers of top level structure plate;
E. last soil excavation: last soil excavation will arrive the foundation ditch bottom, being divided into two parts carries out: space enclosing structure periphery 6～10m scope and foundation ditch middle part base plate scope, elder generation's excavation pit bottom base panel scope, dig to the foundation ditch bottom, disturbing concrete, at this moment the side slope of space enclosing structure periphery 6～10m scope is stayed soil, and form 1: 2 the gradient, treat completed foundation ditch middle part base plate scope underplate concrete water smash finish and reach design strength 80% after again space enclosing structure periphery 6～10m scope is carried out the stripping excavation, and the structural concrete of this part is built in the earthwork of an excavation part immediately.
The earthwork that the stripping excavation is about to above-mentioned space enclosing structure periphery 6～10m scope divides several points of cutting the earth to excavate at interval, take the measure of plane piecemeal, excavating the position and do not excavating to stay between the position and establish interim side slope, principle is that back one construction section soil excavation should begin when last construction section structure construction, form intersection flowing water with this, and piecemeal waters and smashes sole plate, and each spacing of cutting the earth between the point is 20m.
Owing to adopted technique scheme, the present invention that following advantage is arranged:
1, owing to adopts basin excavation, structure adopts the framed bent supporting template system, absolute altitude (excavating except the substrate) and basin top mark height all carry out under the operating mode of every layer of minimum absolute altitude of permission of design at the bottom of the basin of each soil excavation, and be to set according to framed bent specification on the end absolute altitude of floor and the market, promptly be the height that height between at the bottom of basin top bedding plane and the plate just in time satisfies a framed bent standpipe, guarantee architecture quality.Adopt basin excavation can reduce the distortion of foundation ditch diaphragm wall on the one hand, guarantee foundation ditch safety; Can increase the earth volume of open cut for the first time on the other hand, thereby reduce the soil excavation cost.
2, column all adopts the mode of one on a post, and promptly permanent post of structure and interim post are combined into one, directly adopts the mode of steel lattice column external wrapping concrete when permanent post is constructed, easy construction, and cost is more easy to control.
3, aspect control last one deck space enclosing structure distortion, periphery is done after staying soil, treat that doing base plate earlier reaches design strength after, according to the mode of the stripping residue base plate of constructing, remove the method that interim diagonal brace is set under common process like this from.
Description of drawings
Fig. 1 is the tray type excarvating contrary working drawing
The specific embodiment
Describe a specific embodiment of the present invention in detail below in conjunction with Fig. 1:
Certain engineering, its foundation ditch area is big, reaches 40000m
2, the degree of depth reaches 12.6m, and relates to little artesian aquifer, and the surrounding enviroment complicated condition is control foundation pit deformation and increase open cut workload, adopts the top-down construction method of basin excavation, and the concrete construction sequence of this method is as follows:
1. space enclosing structure 1 is set around the place of needs construction and encloses purlin 2, and set steel post 3;
2. soil excavation for the first time: begin cubic metre of earth open cut for the first time from space enclosing structure 1 edge, and in order to reduce the influence of excavation of foundation pit to surrounding enviroment, take to unload the mode of excavation, dig out a benzvalene form structure 4, basin pushes up 5 absolute altitudes, 6 absolute altitudes at the bottom of the basin-7.50m, on benzvalene form structure 4 soil layer faces, lay bed course then, bed course is rubble and concrete, and thickness is about 30cm, and basin pushes up 5 bedding planes and conforms to the length of the accurate steel pipe of a deadline for accepting bid with the distance of B1 top level structure plate at 8 ends, can directly set up framed bent like this, the framed bent vertical rod is the long non junction of system, has reduced manually the reduction expense.Stay the wide soil body of 10m between basin limit 9 and the space enclosing structure 1, can avoid the distortion of space enclosing structure 1,6 put into step-like slope at the bottom of from basin top 5 to basin, the width on each rank and highly should guarantee the structural elevation of floor, and be beneficial to framed bent to set up in 1: 2 ratio.Distance at the bottom of the basin between 6 bedding planes and B1 top level structure plate 8 base plates also is the high 3.3m of being of basin, when the basin height is 3.3m, not only controllably descend the distortion of diaphragm wall, guarantee the quality of structure, and be beneficial to setting up of framed bent, the construction working amount in the construction sequence below reducing.After for the first time earth excavation finishes, set up framed bent, B1 top level structure plate 8 is carried out concreting, and on 8 of B1 top level structure plates, reserve the hole of shoveling.The hole area is about 600～700m
2, and the spacing between hole and the hole is 20m.
3. soil excavation for the second time: according to the hole reserve position on the B1 top level structure face of design, carry out cubic metre of earth tunneling second time, excavate out benzvalene form structure 10, wherein basin pushes up 11 absolute altitudes-10.00m, 12 absolute altitudes at the bottom of the basin-13.00m, basin pushes up 11 bedding planes and conforms to the length of the accurate steel pipe of a deadline for accepting bid with the distance of underground two layers of top level structure plate at 13 ends, stay the wide soil body of 10m between basin limit 14 and the space enclosing structure 1,12 put into step-like slope in 1: 2 ratio at the bottom of from basin top 11 to basin, the width on each rank and height should be guaranteed the structural elevation of floor, at the bottom of the basin 12 with the distance of underground two layers of top level structure plate at 13 ends also be the high 3.3m of being of basin.After earth excavation finishes for the second time, set up framed bent, underground two layers of top level structure plate 13 are carried out concreting, and reserve the hole of fetching earth.
4. there is the method according to step 3 of 3～4 layers of basement structure to construct successively, builds F3/B3 top level structure plate and underground four layers of top level structure plate.Because present embodiment has only two layers of basement structure, the construction that directly enters next step.
5. last soil excavation: last soil excavation will arrive the foundation ditch bottom, soil excavation generally is divided into two parts, be space enclosing structure 1 peripheral 10m scope 15 and the foundation ditch middle part base plate scope 16 that Deformation control is had relatively high expectations, soil excavation basin top mark height-12.00m for the third time wherein, absolute altitude also carries out at twice for substrate absolute altitude excavation at the bottom of the basin, carry out the soil excavation of foundation ditch bottom base panel scope 16 earlier, dig to the foundation ditch bottom, disturbing concrete, at this moment the side slope of space enclosing structure 1 peripheral 10m scope 15 is stayed soil, and forms 1: 2 the gradient.Treat completed foundation ditch middle part base plate scope 16 underplate concretes water smash finish and reach design strength 80% after again space enclosing structure 1 peripheral 10m scope 15 is carried out the stripping excavation, according to certain width interval earth excavation, and accomplish to excavate the structural concrete that this part is built in a part of earthwork immediately.
The stripping excavation is about to cubic metre of earth mode of taking stripping to excavate of above-mentioned space enclosing structure 1 peripheral 10m scope 15, after treating that foundation ditch middle part base plate scope 16 reaches certain intensity, divide five shovelings to press about 20m apart from the earthwork of alternation excavation side slope, take the measure of plane piecemeal, excavating the position and do not excavating to stay between the position and establish interim side slope, principle is that back one construction section soil excavation should form intersection flowing water with this when last construction section structure construction, and piecemeal waters and smashes sole plate.Every base plate soil excavation must be finished in 24 hours to bed course is intact, and reinforcing bar binding, casting and compacting of concrete must be finished in ensuing 48 hours, and promptly every base plate finishes from soil excavation to casting and compacting of concrete, must be in 72 hours.
Adopt tray type excarvating contrary provided by the present invention to construct, whole engineering approximately can be saved 8,000,000 yuans of costs, has improved economic benefit of enterprises.
Claims (2)
1. tray type excarvating contrary construction method, its basic construction sequence is as follows:
A., space enclosing structure is set around the place of needs construction and encloses purlin, and set steel post;
B. soil excavation for the first time: begin cubic metre of earth open cut for the first time from the space enclosing structure edge, dig out a benzvalene form structure, on the soil layer face, lay bed course, build B1 top level structure concrete then, and on the top level structure face, reserve the hole of shoveling, wherein basin top bedding plane conforms to the length of the accurate steel pipe of a deadline for accepting bid with distance between at the bottom of the B1 top level structure plate, leave the wide soil body of 8～10m between basin limit and the space enclosing structure, push up at the bottom of basin from basin and to put into step-like slope in 1: 2 ratio, the basin height is 3.3m;
C. soil excavation for the second time: according to the hole reserve position on the B1 top level structure face of design, carry out cubic metre of earth tunneling second time, excavate out the benzvalene form structure, on the soil layer face, lay bed course, build underground two layers of top level structure concrete then, and reserve the hole of fetching earth, wherein basin top bedding plane conforms to the length of the accurate steel pipe of a deadline for accepting bid with distance between at the bottom of underground two layers of top level structure plate, stay the wide soil body of 8～10m between basin limit and the space enclosing structure, push up at the bottom of basin from basin and to put into step-like slope in 1: 2 ratio, the basin height is 3.3m;
D. there is the method according to step c of 3～4 layers of basement structure to construct successively, builds F3/B3 top level structure plate and underground four layers of top level structure plate;
E. last soil excavation: last soil excavation will arrive the foundation ditch bottom, being divided into two parts carries out: space enclosing structure periphery 6～10m scope and foundation ditch middle part base plate scope, elder generation's excavation pit bottom base panel scope, dig to the foundation ditch bottom, disturbing concrete, at this moment the side slope of space enclosing structure periphery 6～10m scope is stayed soil, and form 1: 2 the gradient, treat completed foundation ditch middle part base plate scope underplate concrete water smash finish and reach design strength 80% after again space enclosing structure periphery 6～10m scope is carried out the stripping excavation, and the structural concrete of this part is built in the earthwork of an excavation part immediately.
2. tray type excarvating contrary construction method according to claim 1, it is characterized in that the earthwork that described stripping excavation is about to above-mentioned space enclosing structure periphery 6～10m scope divides several points of cutting the earth to excavate at interval, and piecemeal waters and smashes sole plate, and each spacing of cutting the earth between the point is 20m.
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| CN101418571A (en) * | 2008-10-15 | 2009-04-29 | 上海市第二市政工程有限公司 | Middle plate construction method of wide pit top-down construction |
| CN101289860B (en) * | 2008-04-10 | 2010-06-09 | 中交三航局第二工程有限公司 | Underwater slope protection construction method for foundation ditch in water |
| CN101956395A (en) * | 2010-10-29 | 2011-01-26 | 浙江宝业建设集团有限公司 | Base board for reducing deformation at periphery of base pit and construction method thereof |
| CN101979779A (en) * | 2010-10-29 | 2011-02-23 | 浙江宝业建设集团有限公司 | Foundation pit construction method capable of preventing nearly inclined buildings from being tilted and sunk |
| CN101775821B (en) * | 2009-12-10 | 2011-06-08 | 中国建筑一局(集团)有限公司 | Device and method for vertically transporting earthwork by reverse construction method |
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| CN102758442A (en) * | 2011-04-28 | 2012-10-31 | 成都中铁隆工程集团有限公司 | Earth excavation method and open-cut tunnel construction method |
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| CN101289860B (en) * | 2008-04-10 | 2010-06-09 | 中交三航局第二工程有限公司 | Underwater slope protection construction method for foundation ditch in water |
| CN101418571A (en) * | 2008-10-15 | 2009-04-29 | 上海市第二市政工程有限公司 | Middle plate construction method of wide pit top-down construction |
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| CN107700495B (en) * | 2017-09-30 | 2019-11-19 | 中国建筑第八工程局有限公司 | The construction method of deep basal pit under complex working condition |
| CN107700496B (en) * | 2017-09-30 | 2019-10-01 | 中国建筑第八工程局有限公司 | The inverse suitable combining construction method of deep basal pit |
| CN108060683A (en) * | 2017-12-18 | 2018-05-22 | 烟建集团有限公司 | A kind of middle weathering geology top-down construction method |
| CN108239983A (en) * | 2018-01-16 | 2018-07-03 | 中铁十九局集团第七工程有限公司 | A kind of construction method of deep basal pit |
| CN108239983B (en) * | 2018-01-16 | 2020-03-24 | 中铁十九局集团第七工程有限公司 | Construction method of deep foundation pit |
| CN108612129A (en) * | 2018-05-03 | 2018-10-02 | 中国建筑第八工程局有限公司 | Based on the top-down construction method that can have enough to meet the need steel platform |
| CN108951640A (en) * | 2018-07-02 | 2018-12-07 | 上海建工集团股份有限公司 | A kind of Extra-Deep Foundation Pit construction method |
| CN110468940A (en) * | 2019-07-26 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of quick supporting excavation construction method without friction of groove |
| CN110792084A (en) * | 2019-11-08 | 2020-02-14 | 中国建筑第八工程局有限公司 | Optimized construction method for reinforcing soil body of passive area at bottom plate boundary of tower |
| CN113338332A (en) * | 2021-04-26 | 2021-09-03 | 上海建工四建集团有限公司 | Reverse construction method for slightly weathered rock area |
| CN113338332B (en) * | 2021-04-26 | 2023-01-06 | 上海建工四建集团有限公司 | Reverse construction method for slightly weathered rock area |
| CN113833024A (en) * | 2021-10-21 | 2021-12-24 | 中国十九冶集团有限公司 | Basin-type excavation combined cover-excavation top-down construction method for water-rich deep and large foundation pit |
| CN113832987A (en) * | 2021-10-28 | 2021-12-24 | 中船勘察设计研究院有限公司 | Reinforcing process of steel lattice stand column in reverse construction method |
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