CN104963344A - Deep foundation pit underground construction method allowing concrete support removal and structure construction to be conducted simultaneously - Google Patents
Deep foundation pit underground construction method allowing concrete support removal and structure construction to be conducted simultaneously Download PDFInfo
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- CN104963344A CN104963344A CN201510418572.6A CN201510418572A CN104963344A CN 104963344 A CN104963344 A CN 104963344A CN 201510418572 A CN201510418572 A CN 201510418572A CN 104963344 A CN104963344 A CN 104963344A
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Abstract
The invention discloses a deep foundation pit underground construction method allowing concrete support removal and structure construction to be conducted simultaneously and relates to the technical field of architectural engineering construction. According to the method, concrete structure vertical circuit purlins are built between the periphery of an underground structure and the inner wall of an underground foundation pit while construction is conducted on the bottom of the underground foundation pit, a bearing type concrete structure trestle is built on the same layer of the circuit purlins, and the ends of the bearing type concrete structure trestle are fixedly connected with the circuit purlins respectively; a concrete structure main support is built between the inner wall of the underground foundation pit and the circuit purlins, and the inner end of the main support is fixedly connected with the circuit purlins; the space under the bearing type concrete structure trestle is divided into a first underground floor and a second underground floor, and reinforced banding and structural construction are conducted on the second underground floor; after roof concrete of the second underground floor reaches the accessible condition, reinforced banding and structural section construction are conducted on the first underground floor. The method has the advantages that construction speed is high, time for dismantlement is short, and environment friendliness is realized.
Description
Technical field
The present invention relates to architectural engineering construction technique field, particularly have the construction of the deep foundation ditch underground structure of inner support.
Background technology
Along with the generally application of highrise building, also more and more higher to the requirement of subterranean excavation, according to construction process requirement, there is the deep foundation ditch Underground Construction of inner support, reach after design strength meets support replacement condition at every layer of underground structure, can remove top concrete inner support, and wait for the formation of Concrete In Structures intensity and carry out dismounting needs to this support and take at least 20 days time, the impact for the construction period in 20 days is well imagined.
Therefore, existing deep foundation ditch underground construction method is long in time limit, and the influence power caused surrounding enviroment is large, is also unfavorable for the protection to environment.
Summary of the invention
The object of the invention is to propose a kind of concrete supporting removal and structure synchronization carries out, can the deep foundation ditch underground construction method of effective reduction of erection time.
The present invention includes following steps:
1) subterranean excavation is excavated;
2) while executing bottom subterranean excavation, between the subsurface structure periphery and described subterranean excavation inwall of design, build concrete structure stands to enclosing purlin, bearing type concrete trestle is built in described same aspect of enclosing in purlin, the end of described bearing type concrete trestle is fixedly connected with the described purlin that encloses respectively, and build the main support of concrete structure at subterranean excavation inwall and described enclosing between purlin, the inner of main support with enclose purlin and be fixedly connected with;
3) be divided into B1 and two layers, underground by below described bearing type concrete trestle, and carry out two layers, underground reinforcing bar binding and structure construction;
4) after the top plate concrete of two layers, underground reaches upper people's condition, carry out B1 reinforcing bar binding and structural segmented construction, remove simultaneously and enclose purlin, bearing type concrete trestle and main support;
5) after enclosing purlin and the dismounting of bearing type concrete trestle, adjacent B1 construction section structure is connected, and then makes subsurface structure waterproof.
The present invention does not affect Underground Construction, and save the time taken needed for support replacement floor maintenance and first supporting removal, can synchronously carry out, speed of application is greatly enhanced, and the dismounting duration is very short; Job site airborne dust is few, minimizing much noise, environmental protection, save material with artificial, and it is convenient to construct.
In the subterranean excavation of large span, also build in concrete trestle at bearing type and connect support link.Improve by support link the intensity that bearing type builds concrete trestle, prevent load-bearing to be out of shape.
Before purlin and bearing type concrete trestle are enclosed in dismounting, the wall column reinforcing bar of the vertical structure of first colligation B1, the full hall structural feet hand cradle of B1 is built in the region then outside trestle bottom and trestle; Until the intensity of the full hall structural feet hand cradle of B1 meet wall column insert construction requirement time, build concrete lower two layers of wall column structurally in the inner side of enclosing purlin, and between adjacent two layers, underground wall column casting beams concrete.
First full hall structural feet hand cradle is built to the inside and outside both sides of enclosing purlin, then remove enclosing purlin, bearing type concrete trestle and main support.
Detailed description of the invention
One, Engineering Notice: center, downtown area, somewhere, project overall floorage is about 158235 square metres, foundation ditch area about 3.2 ten thousand square metres.
Two, engineering difficult point:
1, the duration is tight: require that underground structure is uninterruptedly constructed, and support the time of abolishing very nervous, traditional support mechanical removal mode cannot meet.
2, foundation pit deformation requires high: remove around region and be close to town road, to periphery pipeline and environmental protection requirement high, the impact on it, particularly 3# car ramp position to be controlled in demolishing process and adjacently melt true foundation ditch across a causeway.
3, supporting removal engineering quantity is large: especially first support and trestle region large, cleaning work amount is large; Around construction plant is less, turnover inconvenience, and removing waste material must transport in time, otherwise can affect the overall progress of engineering.
4, civilized construction requires high: remove region and be positioned at business district, requires higher to civilized construction, sanitary clean, management of safe operation.
Three, work progress:
1, by designing requirement excavation subterranean excavation.
2, while executing bottom subterranean excavation, between the subsurface structure periphery and subterranean excavation inwall of design, build concrete structure stands to enclosing purlin, build grid type bearing type concrete trestle in the same aspect in purlin of enclosing, the outer end of bearing type concrete trestle respectively with enclose purlin and be fixedly connected with by reinforced concrete structure.At subterranean excavation inwall with enclose between purlin and build the main support of concrete structure, the inner of main support by reinforced concrete structure with enclose purlin and be connected.Many support link are connected in the grid of each bearing type concrete trestle.
3, B1 and two layers, underground will be divided into below bearing type concrete trestle, by connecting ladder below bearing type concrete trestle, make operating personnel go downwards to two layers, underground from ground through trestle, ladder, and carry out two layers, underground reinforcing bar binding and structure construction.
4, after the top plate concrete of two layers, underground reaches upper people's condition, carry out B1 reinforcing bar binding and structural segmented construction, remove simultaneously and enclose purlin, bearing type concrete trestle and main support.
Before purlin and bearing type concrete trestle are enclosed in dismounting, the wall column reinforcing bar of the vertical structure of first colligation B1, the full hall structural feet hand cradle of B1 is built in the region then outside trestle bottom and trestle.
Until the intensity of the full hall structural feet hand cradle of B1 meet wall column insert construction requirement time, build concrete lower two layers of wall column structurally in the inner side of enclosing purlin, and between adjacent two layers, underground wall column casting beams concrete.
Before purlin is enclosed in dismounting, first full hall structural feet hand cradle is built to the inside and outside both sides of enclosing purlin, purlin, bearing type concrete trestle and main support are split, broken, dismounting to enclosing to adopt the segmentation of SK-SD cable-styled cutting machine again, then adopt mobile crane or the direct handling of tower crane.
Transport outward away and carry out demolition reduction in beta site.
5, formerly enclose in purlin and bearing type concrete trestle region removing, adopt steel concrete to connect adjacent B1 construction section structure, and then make subsurface structure waterproof.
Conclusion: the construction of this method for dismounting does not affect Underground Construction, can synchronously carry out, quickly, the dismounting duration is very short for speed of application; Job site airborne dust seldom, reduce much noise, environmental protection; Mechanically actuated is simple, save material with artificial, and it is convenient to construct.
Around when supporting removal scheme takes into full account that high requirement to job site, foundation ditch surrounding environment, supporting removal engineering quantity are large, first supports and trestle region is removed, construction plant is less, the duration tight and the factor such as engineering design requirements, have selected method for dismounting of reasonably constructing, achieve good construction effect.
Claims (4)
1. the deep foundation ditch underground construction method that carries out of concrete supporting removal and structure synchronization, feature is levied and is to comprise the following steps:
1) subterranean excavation is excavated;
2) while executing bottom subterranean excavation, between the subsurface structure periphery and described subterranean excavation inwall of design, build concrete structure stands to enclosing purlin, bearing type concrete trestle is built in described same aspect of enclosing in purlin, the end of described bearing type concrete trestle is fixedly connected with the described purlin that encloses respectively, and build the main support of concrete structure at subterranean excavation inwall and described enclosing between purlin, the inner of main support with enclose purlin and be fixedly connected with;
3) be divided into B1 and two layers, underground by below described bearing type concrete trestle, and carry out two layers, underground reinforcing bar binding and structure construction;
4) after the top plate concrete of two layers, underground reaches upper people's condition, carry out B1 reinforcing bar binding and structural segmented construction, remove simultaneously and enclose purlin, bearing type concrete trestle and main support;
5) after enclosing purlin and the dismounting of bearing type concrete trestle, adjacent B1 construction section structure is connected, and then makes subsurface structure waterproof.
2. method according to claim 1, feature is levied and is in described step 2) in, build in concrete trestle at bearing type and connect support link.
3. method according to claim 1, feature is levied and is before purlin and bearing type concrete trestle are enclosed in dismounting, the wall column reinforcing bar of the vertical structure of first colligation B1, the full hall structural feet hand cradle of B1 is built in the region then outside trestle bottom and trestle; Until the intensity of the full hall structural feet hand cradle of B1 meet wall column insert construction requirement time, build concrete lower two layers of wall column structurally in the inner side of enclosing purlin, and between adjacent two layers, underground wall column casting beams concrete.
4. method according to claim 1, feature is levied and is first to build full hall structural feet hand cradle to the inside and outside both sides of enclosing purlin, then removes enclosing purlin, bearing type concrete trestle and main support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510418572.6A CN104963344B (en) | 2015-07-17 | 2015-07-17 | The deep basal pit underground construction method that concrete supporting removal and structure construction are synchronously carried out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510418572.6A CN104963344B (en) | 2015-07-17 | 2015-07-17 | The deep basal pit underground construction method that concrete supporting removal and structure construction are synchronously carried out |
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| Publication Number | Publication Date |
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| CN104963344A true CN104963344A (en) | 2015-10-07 |
| CN104963344B CN104963344B (en) | 2017-05-31 |
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| CN201510418572.6A Active CN104963344B (en) | 2015-07-17 | 2015-07-17 | The deep basal pit underground construction method that concrete supporting removal and structure construction are synchronously carried out |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777800A (en) * | 2019-11-04 | 2020-02-11 | 中铁十二局集团有限公司 | Construction method for dismantling foundation pit concrete purlin |
| CN111005388A (en) * | 2019-12-12 | 2020-04-14 | 中冶天工集团有限公司 | Deep foundation pit integral supporting device and supporting method thereof |
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| CN102995659A (en) * | 2012-12-03 | 2013-03-27 | 杭州南联地基基础工程有限公司 | Method for constructing from central area to periphery of ultra-large type underground engineering |
| CN203066082U (en) * | 2013-03-06 | 2013-07-17 | 熊楚炎 | Temporary trestle on edge of anchor rod support type foundation pit |
| RU2489550C1 (en) * | 2011-12-26 | 2013-08-10 | Сергей Олегович Зеге | Method for underground structure erection |
| CN203768788U (en) * | 2014-03-13 | 2014-08-13 | 上海强劲地基工程股份有限公司 | Tool type foundation pit soil conveying trestle bridge |
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2015
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| RU2489550C1 (en) * | 2011-12-26 | 2013-08-10 | Сергей Олегович Зеге | Method for underground structure erection |
| CN102995659A (en) * | 2012-12-03 | 2013-03-27 | 杭州南联地基基础工程有限公司 | Method for constructing from central area to periphery of ultra-large type underground engineering |
| CN203066082U (en) * | 2013-03-06 | 2013-07-17 | 熊楚炎 | Temporary trestle on edge of anchor rod support type foundation pit |
| CN203768788U (en) * | 2014-03-13 | 2014-08-13 | 上海强劲地基工程股份有限公司 | Tool type foundation pit soil conveying trestle bridge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777800A (en) * | 2019-11-04 | 2020-02-11 | 中铁十二局集团有限公司 | Construction method for dismantling foundation pit concrete purlin |
| CN111005388A (en) * | 2019-12-12 | 2020-04-14 | 中冶天工集团有限公司 | Deep foundation pit integral supporting device and supporting method thereof |
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| Publication number | Publication date |
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| CN104963344B (en) | 2017-05-31 |
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