CN104963344B - The deep basal pit underground construction method that concrete supporting removal and structure construction are synchronously carried out - Google Patents
The deep basal pit underground construction method that concrete supporting removal and structure construction are synchronously carried out Download PDFInfo
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- CN104963344B CN104963344B CN201510418572.6A CN201510418572A CN104963344B CN 104963344 B CN104963344 B CN 104963344B CN 201510418572 A CN201510418572 A CN 201510418572A CN 104963344 B CN104963344 B CN 104963344B
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Abstract
The deep basal pit underground construction method that concrete supporting removal and structure synchronization are carried out, it is related to architectural engineering construction technique field, while subterranean excavation bottom is applied, concrete structure is built between subsurface structure periphery and subterranean excavation inwall to stand to enclosing purlin, bearing type concrete trestle is built in the same aspect in purlin of enclosing, the end of bearing type concrete trestle respectively with enclose purlin and be fixedly connected, and the main support of concrete structure is built in subterranean excavation inwall and between enclosing purlin, main support it is inner with enclose purlin and be fixedly connected；Bearing type concrete trestle lower section is divided into two layers of B1 and underground, and carries out the reinforcing bar colligation of two layers of underground and structure construction；After two layers of the top plate concrete in underground reaches upper people's condition, the colligation of B1 reinforcing bar and structural segmented construction are carried out.Speed of application of the present invention is high, removes short time limit, environmental protection.
Description
Technical field
The present invention relates to architectural engineering construction technique field, particularly there is the construction work of the deep basal pit underground structure of inner support
Method.
Background technology
Commonly used with skyscraper, requirement to subterranean excavation also more and more higher, according to construction process requirement, has
The deep basal pit Underground Construction of inner support, reaches after design strength meets support replacement condition in every layer of underground structure, can remove
Top concrete inner support, and wait the formation of structure concrete strength and to the support remove at least 20 day time of occupancy that needs, 20
It is well imagined for the influence of construction period.
Therefore, existing deep basal pit underground construction method is long in time limit, and the influence power caused to surrounding enviroment is big, is also unfavorable for
Protection to environment.
The content of the invention
It is an object of the invention to propose that a kind of concrete supporting removal and structure synchronization are carried out, can effectively shorten the deep base of duration
Hole underground construction method.
The present invention is comprised the following steps：
1）Excavate subterranean excavation；
2）While subterranean excavation bottom is applied, built between the peripheral and described subterranean excavation inwall of subsurface structure of design
Make concrete structure to stand to purlin is enclosed, bearing type concrete trestle, the bearing type concrete structure are built in the same aspect enclosed in purlin
The end of trestle is fixedly connected with the purlin that encloses respectively, and subterranean excavation inwall and it is described enclose purlin between build the main branch of concrete structure
Support, main support it is inner with enclose purlin and be fixedly connected；
3）Bearing type concrete trestle lower section is divided into two layers of B1 and underground, and carries out two layers of underground reinforcing bar
Colligation and structure construction；
4）After two layers of the top plate concrete in underground reaches upper people's condition, carry out the colligation of B1 reinforcing bar and structural segmented apply
Work, while purlin, bearing type concrete trestle and main support are enclosed in dismounting；
5）After purlin and the dismounting of bearing type concrete trestle is enclosed, adjacent B1 construction segment structure is attached,
Then subsurface structure waterproof is made again.
The present invention does not influence Underground Construction, save take needed for the maintenance of support replacement floor and first supporting removal when
Between, can synchronously carry out, speed of application is greatly enhanced, and removes the duration very short；Job site airborne dust is few, reduction is largely made an uproar
Sound, environmental protection, material-saving with it is artificial, and construct it is convenient.
In the subterranean excavation of large span, also built in concrete trestle in bearing type and connect support link.By support
Connecting rod improves the intensity that bearing type builds concrete trestle, prevents load-bearing from deforming.
Before purlin and bearing type concrete trestle are enclosed in dismounting, the wall column reinforcing bar of the vertical structure of first colligation B1,
Then the full hall structure scaffold of B1 is built in the region on the outside of trestle bottom and trestle；Treat the full hall structural feet of B1
When the intensity of hand cradle meets wall column insertion construction requirement, concrete structurally lower two layers of wall column is built in the inner side for enclosing purlin, and adjacent
Two layers of underground wall column between casting beams concrete.
First the inside and outside both sides for enclosing purlin are built with full hall structure scaffold, then to enclosing purlin, bearing type concrete trestle and main branch
Support is removed.
Specific embodiment
First, Engineering Notice：Somewhere downtown area center, project overall floorage is about 158235 square metres, foundation ditch area about 3.2
Ten thousand square metres.
2nd, engineering difficult point：
1st, the duration is tight：It is required that underground structure is uninterruptedly constructed, support the time of abolishing very nervous, traditional support mechanical removal
Mode cannot meet.
2nd, foundation pit deformation requirement is high：Remove around region close to town road, it is high to periphery pipeline and environmental protection requirement,
The influence to it, particularly 3# car ramps position is controlled to melt true foundation ditch across a causeway with adjacent in demolishing process.
3rd, supporting removal quantities is big：Especially first support and trestle region are big, and cleaning work amount is big；Surrounding construction field
Ground is smaller, turnover inconvenience, and removing waste material must transport in time, can otherwise influence the overall progress of engineering.
4th, civilized construction requirement is high：Remove region and be located at business district, to civilized construction, sanitary clean, management of safe operation
It is required that higher.
3rd, work progress：
1st, subterranean excavation is excavated by design requirement.
2nd, while subterranean excavation bottom is applied, concrete is built between the subsurface structure periphery of design and subterranean excavation inwall
Structure is stood to purlin is enclosed, and grid type bearing type concrete trestle is built in the same aspect in purlin of enclosing, bearing type concrete trestle
Outer end respectively with enclose purlin and be fixedly connected by reinforced concrete structure.Concrete structure master is built in subterranean excavation inwall and between enclosing purlin
Support, the inner of main support is connected by reinforced concrete structure with purlin is enclosed.In the grid of each bearing type concrete trestle
Many support links of connection.
3rd, bearing type concrete trestle lower section is divided into two layers of B1 and underground, by bearing type concrete trestle
Lower section connects ladder, operating personnel is gone downwards to two layers of underground through trestle, ladder from ground, and carry out the reinforcing bar colligation of two layers of underground
And structure construction.
4th, after the top plate concrete of two layers of underground reaches upper people's condition, carry out the colligation of B1 reinforcing bar and structural segmented apply
Work, while purlin, bearing type concrete trestle and main support are enclosed in dismounting.
Before purlin and bearing type concrete trestle are enclosed in dismounting, the wall column reinforcing bar of the vertical structure of first colligation B1,
Then the full hall structure scaffold of B1 is built in the region on the outside of trestle bottom and trestle.
When the intensity of the full hall structure scaffold of B1 meets wall column insertion construction requirement, built in the inner side for enclosing purlin
Concrete structurally lower two layers of wall column, and the casting beams concrete between adjacent two layers of underground wall column.
Before purlin is enclosed in dismounting, full hall structure scaffold first is built to the inside and outside both sides for enclosing purlin, then it is cable-styled using SK-SD
Cutting machine segmentation is split to enclosing purlin, bearing type concrete trestle and main support, is crushed, being removed, then using truck crane or
The direct handling of tower crane.
Transport outward away carries out demolition reduction in beta site.
5th, enclose in purlin and bearing type concrete trestle region having removed original, adjacent B1 construction segment structure is adopted
It is attached with armored concrete, subsurface structure waterproof is then made again.
Conclusion：The construction of this method for dismounting does not influence Underground Construction, can synchronously carry out, and speed of application is very fast, tears open
Except the duration is very short；Job site airborne dust is little, reduce much noise, environmental protection；Mechanically actuated is simple, material-saving and people
Work, and it is convenient to construct.
Supporting removal scheme takes into full account high requirement, foundation ditch surrounding environment, the supporting removal quantities to job site
Greatly, construction site is smaller, the duration tight around when first support and trestle region are removed and the factor, selection such as engineering design requirements
Rational construction method for dismounting, achieves good construction effect.
Claims (3)
1. the deep basal pit underground construction method that concrete supporting removal and structure construction are synchronously carried out, comprises the following steps：
1）Excavate subterranean excavation；
2）While subterranean excavation bottom is constructed, built between the peripheral and described subterranean excavation inwall of subsurface structure of design
Concrete structure is stood to purlin is enclosed, and bearing type concrete trestle, the bearing type concrete structure stack are built in the same aspect enclosed in purlin
The end of bridge is fixedly connected with the purlin that encloses respectively, and subterranean excavation inwall and it is described enclose purlin between build the main branch of concrete structure
Support, main support it is inner with enclose purlin and be fixedly connected；
3）Bearing type concrete trestle lower section is divided into two layers of B1 and underground, and carries out the reinforcing bar colligation of two layers of underground
And structure construction；
4）After two layers of the top plate concrete in underground reaches upper people's condition, the colligation of B1 reinforcing bar and structural segmented construction are carried out, together
When remove enclose purlin, bearing type concrete trestle and main support；
5）After purlin and the dismounting of bearing type concrete trestle is enclosed, adjacent B1 construction segment structure is attached, then
Subsurface structure waterproof is made again；
It is characterized in that before purlin and bearing type concrete trestle are enclosed in dismounting, the wall column of the vertical structure of first colligation B1
Reinforcing bar, then B1 is built in the region on the outside of trestle bottom and trestle expires hall structure scaffold；Treat the full hall of B1
When the intensity of structure scaffold meets wall column insertion construction requirement, concrete structurally lower two layers of wall column is built in the inner side for enclosing purlin, and
The casting beams concrete between adjacent two layers of underground wall column.
2. method according to claim 1, it is characterised in that in the step 2）In, connected in bearing type concrete trestle
Support link.
3. method according to claim 1, it is characterised in that full hall structure scaffold first is built to the inside and outside both sides for enclosing purlin,
Removed to enclosing purlin, bearing type concrete trestle and main support again.
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 |
Publications (2)
| Publication Number | Publication Date |
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| CN104963344A CN104963344A (en) | 2015-10-07 |
| CN104963344B true 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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Families Citing this family (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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2489550C1 (en) * | 2011-12-26 | 2013-08-10 | Сергей Олегович Зеге | Method for underground structure erection |
| CN102995659B (en) * | 2012-12-03 | 2015-04-08 | 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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