CN108755701A - The construction method of the support construction of deep basal pit - Google Patents
The construction method of the support construction of deep basal pit Download PDFInfo
- Publication number
- CN108755701A CN108755701A CN201810646148.0A CN201810646148A CN108755701A CN 108755701 A CN108755701 A CN 108755701A CN 201810646148 A CN201810646148 A CN 201810646148A CN 108755701 A CN108755701 A CN 108755701A
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- China
- Prior art keywords
- support
- construction
- building enclosure
- deep basal
- basal pit
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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
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The present invention provides a kind of construction methods of the support construction of deep basal pit, including：Before reinforced concrete support construction, temporary steel support is being added close to the reinforced concrete support top position, the reinforced concrete support construction procedure includes reinforcing bar binding, template erection, casting concrete, maintenance, form removal, the bracing members are made of steel pipe joint, movable end and fixing end, and the bracing members are attached by pre-embedded steel slab in building enclosure or reinforcing bar；The construction of concrete support is carried out in corresponding place；The bracing members are removed after concrete support intensity reaches design requirement.The method of the present invention can make up reinforced concrete support construction period building enclosure without the situation effectively supported, reduce the deformation of reinforced concrete support construction period building enclosure.After reinforced concrete support reaches design requirement, temporary steel support is removed.Stabilization to ensure Extra-Deep Foundation Pit system is effective, and strong guarantee is provided for deep foundation pit construction.
Description
Technical field
The present invention relates to a kind of construction method of deep basal pit, more particularly to a kind of construction party of the support construction of deep basal pit
Method.
Background technology
It is well known that in the prior art, bracing members are the most common supporting forms of deep basal pit.The dead weight of bracing members is small,
Can with dig it is small with support, easy for construction, recyclable recycling, the features such as economical, feature of environmental protection, but the rigidity of bracing members,
Overall deformation is big, in the case where foundation depth is deeper, periphery construction of structures is more complicated, cannot expire only with bracing members system
Requirement of the sufficient deep pit digging to support system.
Therefore, it is necessary to a kind of applying for support construction for the deep basal pit disclosure satisfy that deep pit digging is high to support system requirement
Work method.
Invention content
In view of this, the present invention provides a kind of construction method of the support construction of deep basal pit, it is deep in the prior art to solve
The problem of building enclosure causes building enclosure to deform without support or underbraced during foundation pit construction.
To achieve the goals above, the present invention provides a kind of construction method of the support construction of deep basal pit, the method packet
It includes：
S1:Bracing members are set up, to carry out temporary support to the building enclosure of deep basal pit；
S2:Reinforced concrete support is set near the bracing members, the building enclosure of the deep basal pit is supported.
Optionally, the S1 is specifically included：
S11:Purlin is set in the building enclosure；
S12:The bracing members are erected in the purlin.
Optionally, the setting purlin specifically includes：
S111:Surveying setting-out positions supporting point in the building enclosure, then in the building enclosure described in correspondence
Dig out building enclosure main reinforcement in the position of supporting point；
S112:Purlin holder is welded at the building enclosure main reinforcement, and purlin is installed；
S113:Fill the gap of purlin connection and building enclosure.
Optionally, the S1 can also include：
S11:Pre-embedded steel slab is set inside the building enclosure；
S12:The bracing members are erected on the pre-embedded steel slab.
Optionally, the setting pre-embedded steel slab specifically includes：
S111:Surveying setting-out positions supporting point in the building enclosure, digs out pre-embedded steel slab；
S112:Welding support installs temporary steel support.
Optionally, the S2 is specifically included：
S21:Correspond to the position progress earth excavation and bed course for pouring the armored concrete in the building enclosure
Construction；
S22:The reinforcing bar of armored concrete is installed in the corresponding position that the armored concrete pours；
S23:Concrete-pouring template is installed around the reinforcing bar, and carries out concreting；
S24:After the completion of the concreting conserves, the concrete-pouring template is removed.
Optionally, the construction method further includes：
S3:After the support strength of the armored concrete reaches design requirement, the bracing members are removed.
Optionally, the support strength of the armored concrete is more than or equal to 28 days the time required to reaching design requirement.
A kind of construction method of the support construction of deep basal pit provided by the invention, in reinforced concrete support construction period,
Temporary steel support is set up in advance, makes up reinforced concrete support construction period building enclosure without the situation effectively supported, to right
Building enclosure provides effectively support, reduces the deformation of reinforced concrete support construction period building enclosure.Wait for armored concrete branch
After support reaches design requirement, temporary support is removed.Stabilization to ensure the support system of deep basal pit enclosed structure is effective, is deep
Foundation pit construction provides strong guarantee.
Description of the drawings
Fig. 1 is the Brace in Deep Footing Groove drawing in side sectional elevation (building enclosure for having pre-embedded steel slab) that the embodiment of the present invention one provides；
Fig. 2 is Brace in Deep Footing Groove drawing in side sectional elevation provided by Embodiment 2 of the present invention (building enclosure for having steel purlin)；
Fig. 3 is Brace in Deep Footing Groove profilograph provided by Embodiment 2 of the present invention；
1- purlins, 2- supporting racks, 10- top beams, 20- reinforced concrete supports, 30- waist rails, 40- bracing members, 401- are solid
Fixed end, 402- steel pipe joints, 403- movable ends, 50- pre-embedded steel slabs, 60- steel lattice columns, 70- cast-in-situ bored piles, 80- building enclosures,
801- building enclosure reinforcing bars.
Specific implementation mode
The present invention is described in further detail for mode in the following with reference to the drawings and specific embodiments.According to it is following explanation and
Claims, advantages and features of the invention will become apparent from.It should be noted that attached drawing is all made of very simplified form and
Using non-accurate ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Embodiment one
It is the drawing in side sectional elevation of the present embodiment Brace in Deep Footing Groove as shown in Figure 1, referring to FIG. 1, present embodiments providing one kind
The construction method of the support construction of deep basal pit, includes the following steps：
S1:Bracing members are set up, to carry out temporary support to the building enclosure of deep basal pit；
S2:Reinforced concrete support is set near the bracing members, the building enclosure of the deep basal pit is supported.
As shown in Figure 1, setting 5 supports altogether, and in observation chart 1 it is found that according to position relationship from top to bottom, first
It is set as reinforced concrete support with the 4th support, three support of centre is set as steel support structure.
Because reinforced concrete support needs certain curing time competence exertion supporting role, supported in first and the 4th
During maintenance, foundation pit is in without support exposed state, this can cause the deformation of foundation pit to increase.In view of in first of concrete branch
When support construction, foundation pit does not carry out large area excavation generally, and for cutting depth than shallower, foundation pit deformation is smaller, and needs to wait until
Concrete support reaches the construction that following soil layer can be carried out after design strength, setting temporary steel support to Deformation control meaning not
Greatly, temporary steel support need not be generally set when therefore first of concrete support is constructed.Consider thus mixed in the 4th reinforcing bar
Temporary steel support is arranged in the top clearance position of solidifying soil support, wherein between first of reinforced concrete support and building enclosure 80
It is fixedly connected by top beam, is fixedly connected by waist rail 30 between the 4th reinforced concrete support and building enclosure 80, in
The fixing end 401 and movable end 403 of tri- steel support structures of Jian are attached by the pre-embedded steel slab 50 in building enclosure.
Wherein reinforced concrete support construction procedure is：1. corresponding in the building enclosure and pouring the reinforced concrete
The position progress earth excavation and cushion construction of soil → 2. in the corresponding position that the armored concrete pours, installation reinforcing bar is mixed
The reinforcing bar of soil → 3. install concrete-pouring template around the reinforcing bar is coagulated, and carries out concreting → 4. in the reinforcing bar
Around concrete-pouring template is installed, and carry out concreting → 5. after the completion of the concreting conserve, dismounting institute
State concrete-pouring template.
The construction procedure that the bracing members of pre-embedded steel slab are arranged is：1. preparation of construction → 2. measure and put in the building enclosure
Line positions supporting point, digs out the welding support of pre-embedded steel slab → 3., installs temporary steel support.
After reinforced concrete support reaches design requirement, temporary steel support is removed in accordance with the following steps：
1. crane is in place, wire line hitch pricks the loop wheel machine of support → 2. and is slowly promoted to steel wire rope and tenses without soft → 3. hoist cable work
Check steel wire rope tie up situation, ensure securely → 4. place jack in movable end and apply top power → 5. removing gad → and 6. release
It pushes up power while unloading jack → 7. support rod body lower section, the high strong ties bolt of dismounting → and 8. dismantle support tube coupling, each section point
Section is hung out.
In reinforced concrete support construction period, temporary steel support makes up reinforced concrete support construction period building enclosure
Without the situation effectively supported, effectively support is provided to building enclosure, reduces reinforced concrete support construction period building enclosure
Deformation.Inventor find in Project in no temporary steel support building enclosure offset it is more serious, in the 4th coagulation
Building enclosure sidesway phenomenon has larger improvement when setting up one of temporary steel support at 1.5 meters of soil support top, faces if setting up multiple tracks
When bracing members when for building enclosure sidesway phenomenon improvement more preferably.At the same time increasing temporary steel support means cost and applies
The increasing of work difficulty, therefore needed as needed in practical application and construction condition flexibly selects the number of temporary steel support
Amount differs one for example, reinforced concrete support construction includes reinforcing bar binding, template erection, casting concrete, supports herein
The processes such as shield, form removal, inventor also found that being accomplished to structural strength from reinforced concrete support construction reaches design strength
Need at least 28 days.
Preferably, inventor also found in Project, during setting up temporary steel support, not apply prestressing force
When, bracing members are good when not applying prestressing force for the stablizing effect of building enclosure, therefore, the adjustable steel branch in project application
The prestressing force of support is to obtain preferable effect.
Embodiment two
As shown in Fig. 2, the present embodiment two and embodiment one difference lies in the junctions of bracing members and building enclosure no longer
Be by building enclosure inside pre-embedded steel slab, but by the way that purlin 1 is arranged outside building enclosure, bracing members 40 are supported on purlin
On 1, the movable end 403 and fixing end 401 of intermediate three temporary steel supports pass through the building enclosure in purlin 1 and building enclosure 80
Reinforcing bar 801 connects, and other structures connection type is the same as embodiment one.
The bracing members construction procedure for being provided with purlin is：1. preparation of construction → 2.:It measures and puts in the building enclosure
Dig out building enclosure main reinforcement → 4. in institute in the position of line positioning supporting point → 3. corresponded in the building enclosure supporting point
State at building enclosure main reinforcement welding purlin holder, the gap of the filling purlin connection of installation purlin → 5. and building enclosure → 6. by institute
Bracing members are stated to be erected in the purlin.
After reinforced concrete support reaches design requirement, the bracing members of purlin are removed in accordance with the following steps：
1. steel wire rope lies in the unilateral weld seam of the steel batten plate of two hanging rings of purlin → 2. weld between breaking purlin segmentation respectively
→ 3. promoting purlin, → 4. auxiliary suspension hook, which moves down, which makes purlin rise vertically, → is 5. hung to ground → 6. removing steel corbel → 7. to recycle
It uses.
In conclusion the present invention provides a kind of construction method of the support construction of deep basal pit, by using steel branch simultaneously
Support and reinforced concrete support are supported the building enclosure of deep basal pit, before construction reinforced bar concrete support, using steel branch
Support carries out temporary support to building enclosure, and the construction of reinforced concrete support is then carried out near bracing members.Using the present invention
The method of offer sets up temporary steel support in advance in reinforced concrete support construction period, makes up reinforced concrete support construction
Period building enclosure reduces reinforced concrete support and applies without the situation effectively supported to provide effectively support to building enclosure
The deformation of building enclosure between duration.After reinforced concrete support reaches design requirement, temporary support is removed.To ensure deep base
The stabilization of pit enclosure system is effective, and strong guarantee is provided for deep foundation pit construction.
It should be noted last that foregoing description is only the description to present pre-ferred embodiments, not to model of the present invention
Any restriction enclosed, any change, the modification that the those of ordinary skill in field of the present invention does according to the disclosure above content, belongs to
The protection domain of claims.
Claims (8)
1. a kind of construction method of the support construction of deep basal pit, which is characterized in that include the following steps：
S1:Bracing members are set up, to carry out temporary support to the building enclosure of deep basal pit；
S2:Reinforced concrete support is set near the bracing members, the building enclosure of the deep basal pit is supported.
2. a kind of construction method of the support construction of deep basal pit as described in claim 1, which is characterized in that the S1 is specifically wrapped
It includes：
S11:Purlin is set in the building enclosure；
S12:The bracing members are erected in the purlin.
3. a kind of construction method of the support construction of deep basal pit as claimed in claim 2, which is characterized in that the S11 is specific
Including：
S111:Surveying setting-out positions supporting point in the building enclosure, and the support is then corresponded in the building enclosure
Dig out building enclosure main reinforcement in the position of point；
S112:Purlin holder is welded at the building enclosure main reinforcement, and purlin is installed；
S113:Fill the gap of purlin connection and building enclosure.
4. a kind of construction method of the support construction of deep basal pit as described in claim 1, which is characterized in that the S1 is specifically wrapped
It includes：
S11:Pre-embedded steel slab is set inside the building enclosure；
S12:The bracing members are erected on the pre-embedded steel slab.
5. a kind of construction method of the support construction of deep basal pit as claimed in claim 4, which is characterized in that the S11 is specific
Including：
S111:Surveying setting-out positions supporting point in the building enclosure, digs out pre-embedded steel slab；
S112:Welding support installs temporary steel support.
6. a kind of construction method of the support construction of deep basal pit as described in claim 1, which is characterized in that the S2 is specifically wrapped
It includes：
S21:Correspond to the position progress earth excavation and cushion construction for pouring the armored concrete in the building enclosure；
S22:The reinforcing bar of armored concrete is installed in the corresponding position that the armored concrete pours；
S23:Concrete-pouring template is installed around the reinforcing bar, and carries out concreting；
S24:After the completion of waiting for the concreting maintenance, the concrete-pouring template is removed.
7. a kind of construction method of the support construction of deep basal pit as described in claim 1, which is characterized in that the construction method
Further include：
S3:After the support strength of the armored concrete reaches design requirement, the bracing members are removed.
8. a kind of construction method of the support construction of deep basal pit as claimed in claim 7, which is characterized in that the reinforced concrete
The support strength of soil is more than or equal to 28 days the time required to reaching design requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810646148.0A CN108755701A (en) | 2018-06-21 | 2018-06-21 | The construction method of the support construction of deep basal pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810646148.0A CN108755701A (en) | 2018-06-21 | 2018-06-21 | The construction method of the support construction of deep basal pit |
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| Publication Number | Publication Date |
|---|---|
| CN108755701A true CN108755701A (en) | 2018-11-06 |
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ID=63976174
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810646148.0A Pending CN108755701A (en) | 2018-06-21 | 2018-06-21 | The construction method of the support construction of deep basal pit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440772A (en) * | 2018-12-04 | 2019-03-08 | 上海建工七建集团有限公司 | A kind of interim power transmission reinforcement structure of foundation pit and construction method |
| CN111926858A (en) * | 2020-08-11 | 2020-11-13 | 中铁八局集团昆明铁路建设有限公司 | Construction method for dismantling concrete support of assembled subway station |
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| JP2009203690A (en) * | 2008-02-27 | 2009-09-10 | Nishimatsu Constr Co Ltd | Earth anchor and method of removing the same |
| CN201785758U (en) * | 2010-07-30 | 2011-04-06 | 上海市第五建筑有限公司 | Foundation pit supporting system |
| CN102720201A (en) * | 2012-07-02 | 2012-10-10 | 中建三局第二建设工程有限责任公司 | Support change construction building method implemented by using main structure of building |
| CN202718126U (en) * | 2012-04-24 | 2013-02-06 | 浙江省建工集团有限责任公司 | Deep foundation pit earthwork excavation conversion platform |
| CN104631466A (en) * | 2015-02-06 | 2015-05-20 | 天颂建设集团有限公司 | Construction method of structural system with structural floors as horizontal braces |
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2018
- 2018-06-21 CN CN201810646148.0A patent/CN108755701A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009203690A (en) * | 2008-02-27 | 2009-09-10 | Nishimatsu Constr Co Ltd | Earth anchor and method of removing the same |
| CN201785758U (en) * | 2010-07-30 | 2011-04-06 | 上海市第五建筑有限公司 | Foundation pit supporting system |
| CN202718126U (en) * | 2012-04-24 | 2013-02-06 | 浙江省建工集团有限责任公司 | Deep foundation pit earthwork excavation conversion platform |
| CN102720201A (en) * | 2012-07-02 | 2012-10-10 | 中建三局第二建设工程有限责任公司 | Support change construction building method implemented by using main structure of building |
| CN104631466A (en) * | 2015-02-06 | 2015-05-20 | 天颂建设集团有限公司 | Construction method of structural system with structural floors as horizontal braces |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440772A (en) * | 2018-12-04 | 2019-03-08 | 上海建工七建集团有限公司 | A kind of interim power transmission reinforcement structure of foundation pit and construction method |
| CN111926858A (en) * | 2020-08-11 | 2020-11-13 | 中铁八局集团昆明铁路建设有限公司 | Construction method for dismantling concrete support of assembled subway station |
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Application publication date: 20181106 |