CN110158604A - Support construction method at foundation pit riding track - Google Patents
Support construction method at foundation pit riding track Download PDFInfo
- Publication number
- CN110158604A CN110158604A CN201910532233.9A CN201910532233A CN110158604A CN 110158604 A CN110158604 A CN 110158604A CN 201910532233 A CN201910532233 A CN 201910532233A CN 110158604 A CN110158604 A CN 110158604A
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- Prior art keywords
- construction
- supporting
- riding track
- foundation pit
- area
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Abstract
The present invention relates to foundation pit construction technical field, a kind of support construction method at foundation pit riding track is disclosed, comprising: be located at the construction building enclosure of the construction area at riding track in supporting construction；After building enclosure reaches preset strength, the bottom end absolute altitude of the earthwork in excavation construction region to supporting construction；The supporting beam in construction supporting structure from the bottom up is being excavated in the construction area completed, and is carrying out backfill operation at riding track.Support construction method at a kind of foundation pit riding track provided by the invention, the first building enclosure at construction riding track, and using supporting beam at riding track " inverse to make " construction method, to progress backfill at riding track while supporting beam construction, pit earthwork riding track can be largely reduced and change duration influence and increased costs caused by shifting, the rapid construction for being conducive to base pit engineering especially deep-foundation pit engineering, reduces cost.
Description
Technical field
The present invention relates to foundation pit construction technical fields, more particularly to a kind of support construction method at foundation pit riding track.
Background technique
In the construction of deep-foundation pit engineering, the problems such as will appear ground structure sedimentation and deformation, supporting construction sidesway often.It is right
This need to often take the measure of some pattern foundation pit supporting structures to promote the stability of deep basal pit, and the support form generallyd use at present has mixed
Solidifying fortifield village's fender pile, reinforced concrete inner support beam is combined with fender post, fender post is combined with transversal reinforcement body.
Deep foundation pit supporting structure is generally using the central shoring structure being arranged in foundation pit, to carry out uniformly firm branch to foundation pit
Support.The conventional construction method of central shoring structure be first by earth excavation to designed elevation, after providing enough work surfaces for supporting beam, then
All assembling reinforcement, laying template, casting concrete.
Currently, according to conventional construction sequence, often needing to change shifting in the central shoring construction stage when deep basal pit is designed using central shoring
Riding track be unearthed to create work surface for central shoring, tremendous influence is caused to duration, expense etc..
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide a kind of support construction methods at foundation pit riding track, solve for solution or part deep at present
When foundation pit is designed using central shoring, according to conventional construction sequence, often need to change the native riding track of removal in the central shoring construction stage for ring
The problem of work surface is created in support, causes tremendous influence to duration, expense etc..
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of support construction methods at foundation pit riding track, comprising: in supporting
Structure is located at the construction building enclosure of the construction area at riding track；After building enclosure reaches preset strength, excavation construction region
Cubic metre of earth to supporting construction bottom end absolute altitude；Excavating the support in construction supporting structure from the bottom up in the construction area completed
Beam, and carry out backfill operation at riding track.
On the basis of above scheme, also wrapped before supporting construction is located at the construction building enclosure of the construction area at riding track
It includes: flowing water section circumferentially being divided along foundation pit to supporting construction, and according to default supporting construction and riding track position, determines construction area
Range.
On the basis of above scheme, got rid of according to reinforcing bar in default riding track width, two sides sloping coefficient and supporting construction
Stubble length determines the range of construction area, the construction area covered at least in riding track width direction riding track and two sides there are
Reinforcing bar gets rid of a batch space.
On the basis of above scheme, also wrapped before the bottom end absolute altitude of the earthwork to supporting construction in excavation construction region
It includes: crown beam and prestress anchorage cable in construction area in construction supporting structure.
On the basis of above scheme, excavating periphery of the construction area of completion in foundation pit has slope region, described
The sloping coefficient in slope region is determined according to construction requirement.
On the basis of above scheme, the support in construction supporting structure from the bottom up in the construction area completed is being excavated
Beam, and carry out backfill operation and specifically include: excavating the construction area bottom construction base layer support beam completed；To base layer support
After beam reaches preset strength, the operation of primary backfill soil is carried out；Successively layer-by-layer Construction Support beam upwards, and successively carry out backfill work
Industry；It is finished to the construction of top layer supporting beam after reaching preset strength, earthing forms the riding track at construction area.
On the basis of above scheme, the preferential foundation trench soil for selecting other earth excavation regions in foundation pit is made as backfill
The Tu Yuan of industry.
On the basis of above scheme, after every layer of supporting beam construction, the backfill operation carried out reaches one layer
At the absolute altitude of supporting beam to be onstructed.
On the basis of above scheme, while the earthwork in excavation construction region, to other flowing water sections of supporting construction according to
Serial number carries out earth excavation.
On the basis of above scheme, the building enclosure includes support pile.
(3) beneficial effect
Support construction method at a kind of foundation pit riding track provided by the invention, the first building enclosure at construction riding track, and use
Supporting beam " inverse to make " construction method can largely reduce base to backfill is carried out at riding track while supporting beam construction at riding track
Hole earthwork riding track changes duration influence and increased costs caused by moving, is conducive to the quick of base pit engineering especially deep-foundation pit engineering
Construction, reduces cost.
Detailed description of the invention
Fig. 1 is the schematic top plan view of foundation pit supporting construction in the embodiment of the present invention；
Fig. 2 is the schematic diagram of construction area and slope region in the embodiment of the present invention；
Fig. 3 is the schematic diagram of backfill operating area in the embodiment of the present invention；
Fig. 4 is that riding track fills out the schematic diagram set in the embodiment of the present invention.
Description of symbols:
Wherein, 101: riding track；102: construction area；103: slope region；104: backfill region.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Following instance
For illustrating the present invention, but it is not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
The embodiment of the present invention provides a kind of support construction method at foundation pit riding track, which includes: with reference to figure
1, it is located at the construction building enclosure of the construction area 102 at riding track 101 in supporting construction；After building enclosure reaches preset strength,
The earthwork in excavation construction region 102 to supporting construction bottom end absolute altitude；It is applied from the bottom up excavating in the construction area 102 completed
Supporting beam in work supporting construction, and carry out backfill operation.
Provided in this embodiment is a kind of construction method of supporting construction " inverse to make " at riding track in foundation pit.Fig. 1 is a kind of base
The schematic top plan view of pit supporting construction.As shown in Figure 1, the supporting construction in foundation pit is annular in shape in foundation pit, with uniformly firm
Foundation pit is supported.Foundation pit supporting construction generally comprises building enclosure, anchor cable structure, crown beam, waist rail and supporting beam etc..It goes along with sb. to guard him
Structure can be support pile.Wherein being located at supporting construction outmost turns is a circle connected at the top of the support pile contacted with foundation pit inner sidewall
Beam body is crown beam；The connected collar tie beam body of waist is waist rail.Supporting beam be in supporting construction other than crown beam and waist rail
Other beam bodies.The construction method is first constructed the building enclosures such as support pile at riding track 101, then disposably will be native at riding track 101
Side is excavated to lowermost end supporting beam absolute altitude；Construction Support beam upwards in turn again, finally fills out and sets riding track 101.
Support construction method at a kind of foundation pit riding track provided in this embodiment first goes along with sb. to guard him knot at construction riding track 101
Structure, and using supporting beam at riding track 101 " inverse to make " construction method, to being backfilled at riding track 101 while supporting beam construction
Soil can largely reduce pit earthwork riding track 101 and change duration influence and increased costs caused by shifting, be conducive to base pit engineering especially
It is the rapid construction of deep-foundation pit engineering, reduces cost.
On the basis of the above embodiments, further, it is applied in the construction area 102 that supporting construction is located at riding track 101
Before work building enclosure further include: circumferentially divide flowing water section along foundation pit to supporting construction, and according to default supporting construction and horse
101 position of road, determines the range of construction area 102.
The construction method divides flowing water section to supporting construction first, that is, is divided into several segments and determining every section of sequence of construction.
It is construction area 102 described in above-described embodiment that supporting construction, which is located at the flowing water section at riding track 101,.
On the basis of the above embodiments, further, the specific range of construction area 102 should be first determined.With reference to Fig. 2,
The model that batch length determines construction area 102 is got rid of according to reinforcing bar in default 101 width of riding track, two sides sloping coefficient and supporting construction
It encloses, riding track 101 is covered at least in 101 width direction of riding track for construction area 102 and there are reinforcing bars to get rid of a batch space in two sides.
With reference to Fig. 1, riding track 101 is to two sides slope.Construction area 102 is to intersect repetition with riding track 101 in supporting construction
Region base on, to two sides, there are the regions that reinforcing bar gets rid of batch space；Or the regional scope bigger than this region.Reinforcing bar is set
Getting rid of stubble can be convenient for being connected with other flowing water sections.Further, the side of construction area 102 can be linear, dig convenient for the earthwork.
On the basis of the above embodiments, further, excavation construction region 102 the earthwork to the bottom end of supporting construction
Before absolute altitude further include: crown beam and prestress anchorage cable in construction area 102 in construction supporting structure.Reach in support pile
After preset strength, can first earth excavation is to crown beam and the absolute altitude of prestress anchorage cable in construction area 102, crown beam of then constructing
And prestress anchorage cable；Then it is further continued for the absolute altitude of earth excavation to bottom supporting beam.Crown beam of first constructing and prestress anchorage cable can
Structural stability is improved, safety is improved.
On the basis of the above embodiments, further, with reference to Fig. 2, the construction area 102 of completion is excavated in foundation pit
Periphery has slope region 103, and the sloping coefficient in slope region 103 is determined according to construction requirement.Excavate the construction area of completion
It is ramp shaped between at the top of 102 bottom of domain and earth's surface or foundation pit.Setting slope region 103 can both dig convenient for the earthwork, convenient for applying
The progress of work, and wall surface slump can be prevented, improve safety.
Specifically, the sloping coefficient in slope region 103 can be 1/1, and it can also be other, for the purpose of meeting construction requirement,
Without limitation.
On the basis of the above embodiments, further, construction from the bottom up in the construction area 102 completed is being excavated
Supporting beam in protection structure, and carry out backfill operation and specifically include: excavating 102 bottom of the construction area construction bottom completed
Supporting beam；After base layer support beam reaches preset strength, the operation of primary backfill soil is carried out；Successively layer-by-layer Construction Support beam upwards,
And successively carry out backfill operation；It is finished to the construction of top layer supporting beam after reaching preset strength, earthing is formed at construction area 102
Riding track 101.
Banketing for riding track 101 is carried out in Construction Support beam.On top after the completion of first of supporting beam construction, earthing shape
At final riding track 101.The riding track 101 can be used to foundation pit to be unearthed and finish.It is banketed using layering, is applied compared to whole supporting beams
It bankets again after the completion of work, it can be convenient for the progress for operation of banketing, so as to be conducive to the quality progress control to operation of banketing；
The construction of upper one layer of supporting beam can be also convenient for after banketing simultaneously.
On the basis of the above embodiments, further, the foundation trench soil in other earth excavation regions in foundation pit is preferentially selected
Tu Yuan as backfill operation.
On the basis of the above embodiments, further, with reference to Fig. 3, after every layer of supporting beam construction, what is carried out is returned
Operation of banketing reaches at the absolute altitude of one layer of supporting beam to be onstructed.That is after every layer of supporting beam construction, backfill region 104
Absolute altitude is above the absolute altitude of this layer of supporting beam.Convenient for the construction of upper one layer of supporting beam to be onstructed, and filling out for riding track 101 can be improved
Native efficiency accelerates the formation of riding track 101.
On the basis of the above embodiments, further, while the earthwork in excavation construction region 102, to supporting construction
Other flowing water sections carry out earth excavation according to serial number.
On the basis of the above embodiments, further, the building enclosure includes support pile.
On the basis of the above embodiments, further, a kind of support construction method at foundation pit riding track are as follows: to riding track
101 positions carry out " inverse to make " construction, i.e., first carry out 101 position supporting pile driving construction of riding track in the support pile construction stage, reach intensity
The position earth excavation to designed elevation is subjected to anchor cable afterwards and crown beam is constructed, continues to be excavated to lowermost end central shoring beam mark after tensioning
Height, carries out central shoring construction, and intensity, which reaches, to be backfilled to upper track central shoring absolute altitude after design requirement and construct.With reference to Fig. 4, from below to up
Successively backfill is constructed central shoring beam again, and intensity, which reaches backfill after design requirement, repairs and set out native riding track 101, which can be used
It is unearthed and completes to foundation pit.
Specifically: central shoring beam, that is, supporting construction is divided into flowing water section first, 101 region of riding track is that the first flowing water section is
Construction area 102.First flowing water segment limit comprehensively considers 101 width of riding track, 101 sloping coefficient of riding track, reinforcing bar and gets rid of batch length etc.
Factor determines.
The structures such as support pile, crown beam, prestress anchorage cable at first flowing water section of first constructing, after reaching intensity, layer and section to
Lower slope is excavated to lowermost end central shoring beam absolute altitude, central shoring at the absolute altitude of constructing.In the downward earth excavation of the first flowing water section, other
Section carries out earth excavation according to flowing water section serial number.
After the construction of lowermost end central shoring beam finishes and reaches design strength, backfill operation is carried out.If soil property can be used as in field
Backfill considers that other flowing water sections are carrying out digging, and the soil for preferably using foundation trench soil i.e. other flowing water sections to dig out is used as back
It bankets source.Backfill operation need to be executed in strict accordance with related request, to ensure that per pass central shoring absolute altitude is precisely controlled.
Backfill, construction central shoring upwards in turn, until first of the central shoring in top construction finishes after reaching design strength, earthing shape
At final riding track 101, which can be used to being unearthed and finishes.The construction period is greatly saved, is conducive to control cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of support construction method at foundation pit riding track characterized by comprising
It is located at the construction building enclosure of the construction area at riding track in supporting construction；
After building enclosure reaches preset strength, the bottom end absolute altitude of the earthwork in excavation construction region to supporting construction；
The supporting beam in construction supporting structure from the bottom up is being excavated in the construction area completed, and is carrying out backfill at riding track and makees
Industry.
2. construction method according to claim 1, which is characterized in that applied in the construction area that supporting construction is located at riding track
Before work building enclosure further include:
Flowing water section is circumferentially divided along foundation pit to supporting construction, and according to default supporting construction and riding track position, determines construction area
The range in domain.
3. construction method according to claim 2, which is characterized in that according to default riding track width, two sides sloping coefficient with
And reinforcing bar gets rid of the range that batch length determines construction area in supporting construction, the construction area at least covers in riding track width direction
Lid riding track and there are reinforcing bars to get rid of a batch space in two sides.
4. construction method according to claim 1, which is characterized in that excavation construction region the earthwork to supporting construction
Before the absolute altitude of bottom end further include: crown beam and prestress anchorage cable in construction area in construction supporting structure.
5. construction method according to claim 1, which is characterized in that excavate periphery of the construction area of completion in foundation pit
With slope region, the sloping coefficient in the slope region is determined according to construction requirement.
6. construction method according to claim 1, which is characterized in that applied from the bottom up excavating in the construction area completed
Supporting beam in work supporting construction, and carry out backfill operation and specifically include:
Excavating the construction area bottom construction base layer support beam completed；
After base layer support beam reaches preset strength, the operation of primary backfill soil is carried out；
Successively layer-by-layer Construction Support beam upwards, and successively carry out backfill operation；
It is finished to the construction of top layer supporting beam after reaching preset strength, earthing forms the riding track at construction area.
7. construction method according to claim 1 or 6, which is characterized in that preferential to select other earth excavation areas in foundation pit
Tu Yuan of the foundation trench soil in domain as backfill operation.
8. construction method according to claim 6, which is characterized in that after every layer of supporting beam construction, what is carried out is returned
Operation of banketing reaches at the absolute altitude of one layer of supporting beam to be onstructed.
9. construction method according to claim 2, which is characterized in that while the earthwork in excavation construction region, to supporting
Other flowing water sections of structure carry out earth excavation according to serial number.
10. construction method according to claim 1, which is characterized in that the building enclosure includes support pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532233.9A CN110158604B (en) | 2019-06-19 | 2019-06-19 | Construction method of supporting structure at underpass of foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910532233.9A CN110158604B (en) | 2019-06-19 | 2019-06-19 | Construction method of supporting structure at underpass of foundation pit |
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| Publication Number | Publication Date |
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| CN110158604A true CN110158604A (en) | 2019-08-23 |
| CN110158604B CN110158604B (en) | 2021-07-02 |
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| CN201910532233.9A Active CN110158604B (en) | 2019-06-19 | 2019-06-19 | Construction method of supporting structure at underpass of foundation pit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652443A (en) * | 2013-11-21 | 2015-05-27 | 中冶天工上海十三冶建设有限公司 | Construction method for temporary horizontal supports serving as permanent structural beams simultaneously of deep foundation pit |
| CN104912098A (en) * | 2015-06-01 | 2015-09-16 | 中建四局第六建筑工程有限公司 | Combined construction method for supporting beam plate and structural plate of deep foundation pit |
| CN204676556U (en) * | 2015-05-14 | 2015-09-30 | 中国建筑第八工程局有限公司 | One is encorbelmented People's Bank of China's packway |
| KR20170017194A (en) * | 2015-08-05 | 2017-02-15 | 김용여 | Cut and cover retain of earth using light weight decking panel and support plate, and method for constructing this same |
| CN106759366A (en) * | 2017-01-25 | 2017-05-31 | 北京市政建设集团有限责任公司 | The construction method that soil excavation is arranged with packway in a kind of foundation ditch |
| CN109680691A (en) * | 2018-12-25 | 2019-04-26 | 三箭建设工程集团有限公司 | The earthwork digging method of foundation pit annular brace |
-
2019
- 2019-06-19 CN CN201910532233.9A patent/CN110158604B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652443A (en) * | 2013-11-21 | 2015-05-27 | 中冶天工上海十三冶建设有限公司 | Construction method for temporary horizontal supports serving as permanent structural beams simultaneously of deep foundation pit |
| CN204676556U (en) * | 2015-05-14 | 2015-09-30 | 中国建筑第八工程局有限公司 | One is encorbelmented People's Bank of China's packway |
| CN104912098A (en) * | 2015-06-01 | 2015-09-16 | 中建四局第六建筑工程有限公司 | Combined construction method for supporting beam plate and structural plate of deep foundation pit |
| KR20170017194A (en) * | 2015-08-05 | 2017-02-15 | 김용여 | Cut and cover retain of earth using light weight decking panel and support plate, and method for constructing this same |
| CN106759366A (en) * | 2017-01-25 | 2017-05-31 | 北京市政建设集团有限责任公司 | The construction method that soil excavation is arranged with packway in a kind of foundation ditch |
| CN109680691A (en) * | 2018-12-25 | 2019-04-26 | 三箭建设工程集团有限公司 | The earthwork digging method of foundation pit annular brace |
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| CN110158604B (en) | 2021-07-02 |
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