CN107190986A - A kind of construction method of concrete structure - Google Patents
A kind of construction method of concrete structure Download PDFInfo
- Publication number
- CN107190986A CN107190986A CN201710302171.3A CN201710302171A CN107190986A CN 107190986 A CN107190986 A CN 107190986A CN 201710302171 A CN201710302171 A CN 201710302171A CN 107190986 A CN107190986 A CN 107190986A
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- China
- Prior art keywords
- steel
- construction method
- concrete structure
- aqueduct
- cast
- Prior art date
- 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.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000009417 prefabrication Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 63
- 239000010959 steel Substances 0.000 claims description 63
- 239000002689 soil Substances 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 claims description 6
- 244000035744 Hura crepitans Species 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims 1
- 239000011150 reinforced concrete Substances 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000316770 Deschampsia cespitosa var. alpina Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of construction method of concrete structure, this method mainly uses the cast-in-place and prefabricated construction method being combined, cast-in-place concrete structure will be needed to pass through the certain height of support system lifting, concrete structure now is poured using prefabrication state, after its intensity reaches design requirement, carry out the lower step process such as prestressed stretch-draw, after the completion of transfer to cast-in-place position using support system.To solve big weight aqueduct and bridge bottom the tension crack problem caused by deadweight is too big, at the same solve cast-in-place concrete because two ends are constrained and caused by steam curing it is easy to crack the problem of.Pouring for the prestressed reinforced concrete constructions such as pre-stressed bridge, aqueduct is carried out by the construction method of the present invention, pouring quality is good, reduced investment, and material expense is few, lease expenses is low, take and tear open conveniently, mechanical work, labor strength is low, short time limit, stiffening basic ground amount is few, it is not necessary to which, to mounting system precompressed, labour cost is low.
Description
Technical field
The present invention relates to the big weight coagulation under the technical field of construction of concrete structure, more particularly to a kind of soft soil foundation
The construction method of soil structure.
Background technology
At present in construction industry, mainly have pre- to the construction method of the big weight concrete structure such as aqueduct, bridge
Two kinds of preparation method and cast-in-place method.
The advantage of prefabrication is that pouring quality is easily guaranteed that, it has the disadvantage, and investment is very big, need Large-scale Bridge Erector and
Door machine etc. equipment, be also required to it is longer than larger prefabricated place, construction period.
Cast-in-place method is constructed frequently with full hall scaffold supporting methods and steel pipe column Bailey bracket supporting methods, compared to prefabricated
Method, although solve that investment is big, need large scale equipment, the problems such as the duration is longer, but its pouring quality is not easy to ensure, and on ground
When base basis is subgrade, collapsible loess foundation, expansive soil foundation, frozen soil foundation, due to the two of cast-in-place concrete
End is supported on pier shaft, and pier shaft is cast in pile foundation and cushion cap, is difficult, but scaffold or steel pipe column are supported directly on ground
On base, ground is needed by especially processing at support, and processing cost is very high and to reach that construction intensity standard has certain difficulty, such as
Fruit basement process is bad or weight is larger, sometimes even over more than 1500t, just sinks at intermediate supports, causes bridge
Body or groove body cracking.When particularly post stressed concrete is constructed, the concrete and no-reinforcing-bar or steel strand wires just poured is held
By pulling force, it is easier to ftracture.Cast-in-place method is needed to often across supporting support precompressed in addition, and precompressed weight reaches kiloton, quantities
Greatly, it is costly, it is long in time limit.While cast-in-place method can not be conserved because of the constraint at two ends using steam curing mode, for the duration
The quantity of support system is significantly increased in nervous requirement of engineering.How to overcome defect present in above two construction method into
For urgent problem.
The content of the invention
It is an object of the invention to provide a kind of construction method of the big weight concrete structure under soft soil foundation, belong to soft
The cast-in-place and prefabricated arrangement and method for construction being combined of the concrete structures such as big weight aqueduct, bridge under soil base, is entered by the program
The prestressed reinforced concrete constructions such as row pre-stressed bridge, aqueduct are poured.Pouring quality is good, reduced investment, and material expense is few, lease
Expense is low, takes and tears open conveniently, mechanical work, labor strength is low, and short time limit, stiffening basic ground amount is few, it is not necessary to support
System precompressed, labour cost is low.
The technical solution adopted in the present invention is as follows：
A kind of construction method of concrete structure, this method is applied to the construction of the big weight concrete structure under soft soil foundation
In, it is characterised in that：
Step S101, flattens to location in the middle of pier shaft, is compacted with road roller, to the not readily accessible soft soil foundation of compactness using paving
If steel plate；
Step S102, installs steel box-girder framework platform, platform uses integral solder structure, when ground degree of being backfilling and compacted is more than or equal to
When 97%, using split box beam, the box beam is arranged at the steel pipe column strong point, and carries out Strength co-mputation and amount of deflection check；
Step S103, installs steel column and steel column connection system on steel box-girder framework platform；
Step S104, hydraulic top is set on the top of each steel column；
Step S105, laterally installs 2 I-steel and I-steel connecting rod above hydraulic top；
Step S106, I-steel restocking is marked with quasi- Bailey truss, and special overhanging beam is installed in the left and right sides, while making aqueduct body
Or bridge is maintained at prefabrication state；
The template system installed and matched with full hall frame on channel-section steel, channel-section steel is laid on step S107, Bailey truss；
Step S108, reinforcement placing, steel strand wires, temperature control system, filling system；
Step S109, casting concrete lays the material of maintenance；
Step S110, by age requirement progressively form removal, and being cleared up.
Step S111, maintenance to concrete was reached after age, carried out the processes such as prestressed stretch-draw, grouting, sealing off and covering anchorage.
Step S112, slurries were reached after age, were cleared up seat surface and were put down hydraulic top, make concrete structure in place.
Step S113, progressively removes bed die and support system from top to bottom.
Preferably, 30mm steel plates are laid.
Preferably, steel column connection system is bi-directionally connected using angle steel.
Preferably, described aqueduct body or bridge is maintained at prefabrication state using hydraulic top or sandbox, hydraulic top is used
Pressure duct is connected with hydraulic power unit and excludes circuit air.
Preferably, side form, stretch-draw prestressing force steel strand wires and deformed bar are progressively removed.
Preferably, reach that support system was removed after age, remove the special overhanging beam in left and right.
Preferably, aqueduct bearing basal plane is cleared up, hydraulic top, aqueduct or bridge in place is slowly put down.
Beneficial effects of the present invention are as follows compared with prior art：Instant invention overcomes prior art defect, one is disclosed
The cast-in-place and prefabricated construction methods being combined of concrete structure such as big weight aqueduct, bridge under kind soft soil foundation, under having reached
State effect：1）Prefabrication state is in during concreting, super large weight or the bad caused setting of ground of basement process can only make
Into the integral sinking of whole system, will not generation trough body or the body of a bridge cracking, it is easier to ensure quality, solve under soft soil foundation
The cast-in-place construction quality problems of big weight concrete structure；2）Using steel box-girder frame structure and can be according to foundation bearing capacity situation
Install into raft foundation additional, while vertically forming truss structure, bearing capacity is big, and reusable, the duration is fast.It is not in single steel
Tubing string unstability, basement process is simple, eliminates the thick concrete of 30mm and 30mm hassocks layer under full hall or Bailey bracket, it is not necessary to right
Ground is especially handled；3）Using hydraulic top, can the pressure that bears of each steel pipe column of adjust automatically it is consistent, the stability to structure has
Profit；4）The bearing of damage can be changed；5）Need not to often across support system carry out precompressed, reduce expense, contract
The short duration.6）Because being in prefabrication state after the completion of concreting, it can be conserved using steam curing mode, for needing 28
The duration is greatly shortened to reach that the concrete of prestressing force tensile strength only needs to that maintenance can be completed within 1 day in its natural curing,
The quantity of support system is greatly reduced.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the construction method of the concrete structure；
Fig. 2 is the structural representation of the concrete structure.
Embodiment
In order to better illustrate the present invention, further is made to technical scheme in conjunction with specific embodiment and Figure of description
Explanation.Although having recorded these specific embodiments in embodiment, so it is not limited to the present invention, any affiliated skill
Have usually intellectual in art field, without departing from the spirit and scope of the present invention, when a little change and retouching can be made, therefore
The scope of protection of the present invention is defined by those of the claims.
The schematic flow sheet of the construction method of the concrete structure is as shown in figure 1, the construction method comprises the following steps：
Step S101, flattens to location in the middle of pier shaft, is compacted with road roller, to the not readily accessible soft soil foundation of compactness using paving
If steel plate；
Wherein, steel plate thickness is laid for 30mm.
Step S102, installs steel box-girder framework platform, platform uses integral solder structure, when ground degree of being backfilling and compacted is more than
During equal to 97%, using split box beam, the box beam is arranged at the steel pipe column strong point, and carries out Strength co-mputation and amount of deflection check；
Step S103, installs steel column and steel column connection system on steel box-girder framework platform；
Wherein, steel column connection system is bi-directionally connected using angle steel.
Step S104, hydraulic top is set on the top of each steel column；
Wherein, hydraulic top is connected with hydraulic power unit using pressure duct and excludes circuit air.
Step S105, laterally installs 2 I-steel and I-steel connecting rod above hydraulic top；
Step S106, I-steel restocking is marked with quasi- Bailey truss, and special overhanging beam is installed in the left and right sides, while passing through hydraulic top
Or sandbox makes aqueduct body or bridge be maintained at prefabrication state；
The template system installed and matched with full hall frame on channel-section steel, channel-section steel is laid on step S107, Bailey truss；
Step S108, reinforcement placing, steel strand wires, temperature control system, filling system；
Step S109, casting concrete lays the material of maintenance；
Step S110, by age requirement progressively form removal, and being cleared up.
Wherein, form removal includes progressively removing side form, stretch-draw prestressing force steel strand wires and deformed bar, it is preferable that
Reach that support system was removed after age, remove the special overhanging beam in left and right.
Then, aqueduct bearing basal plane is cleared up, hydraulic top, aqueduct or bridge in place is slowly put down.
The structural representation of the concrete structure is as shown in Figure 2.The structure of the concrete structure includes aqueduct or bridge
201st, channel-section steel 202, Bailey bracket 203, double I-steel 204, hydraulic top 205, pier shaft 206, connecting rod 207, steel box-girder framework
208th, cushion cap 209, pile foundation 210, end template 211.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (7)
1. a kind of construction method of concrete structure, this method is applied to the construction of the big weight concrete structure under soft soil foundation
In, it is characterised in that：
Step S101, flattens to location in the middle of pier shaft, is compacted with road roller, to the not readily accessible soft soil foundation of compactness using paving
If steel plate；
Step S102, installs steel box-girder framework platform, platform uses integral solder structure, when ground degree of being backfilling and compacted is more than or equal to
When 97%, using split box beam, the box beam is arranged at the steel pipe column strong point, and carries out Strength co-mputation and amount of deflection check；
Step S103, installs steel column and steel column connection system on steel box-girder framework platform；
Step S104, hydraulic top is set on the top of each steel column；
Step S105, laterally installs 2 I-steel and I-steel connecting rod above hydraulic top；
Step S106, I-steel restocking is marked with quasi- Bailey truss, and special overhanging beam is installed in the left and right sides, while making aqueduct body
Or bridge is maintained at prefabrication state；
The template system installed and matched with full hall frame on channel-section steel, channel-section steel is laid on step S107, Bailey truss；
Step S108, reinforcement placing, steel strand wires, temperature control system, filling system；
Step S109, casting concrete is laid the material of maintenance and conserved；
Step S110, progressively removes side template, and cleared up by age requirement；
Step S111, maintenance to concrete was reached after age, carried out prestressed stretch-draw, grouting, covering anchorage operation；
Step S112, slurries were reached after age, were cleared up seat surface and were put down hydraulic top, make concrete structure in place；
Step S113, progressively removes bed die and support system from top to bottom.
2. construction method as claimed in claim 1, it is characterised in that：The laying steel plate is laying 30mm steel plates.
3. construction method as claimed in claim 1, it is characterised in that：The steel column connection system uses steel pipe, channel-section steel or angle
Steel is bi-directionally connected.
4. construction method as claimed in claim 1, it is characterised in that：It is described aqueduct body or bridge is maintained at prefabrication state
Using hydraulic top or sandbox, the hydraulic top is connected with hydraulic power unit using pressure duct and excludes circuit air.
5. construction method as claimed in claim 1, it is characterised in that described progressively form removal is specifically included by age requirement：
Progressively remove side form, stretch-draw prestressing force steel strand wires and deformed bar.
6. the construction method as described in claim 1 or 5, it is characterised in that described progressively form removal is specifically wrapped by age requirement
Include：
Reach that support system was removed after age, remove the special overhanging beam in left and right.
7. construction method as claimed in claim 1, it is characterised in that the cleaning is specifically included：
Aqueduct bearing basal plane is cleared up, hydraulic top, aqueduct or bridge in place is slowly put down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710302171.3A CN107190986A (en) | 2017-05-02 | 2017-05-02 | A kind of construction method of concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710302171.3A CN107190986A (en) | 2017-05-02 | 2017-05-02 | A kind of construction method of concrete structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107190986A true CN107190986A (en) | 2017-09-22 |
Family
ID=59873950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710302171.3A Pending CN107190986A (en) | 2017-05-02 | 2017-05-02 | A kind of construction method of concrete structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN107190986A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243652A (en) * | 2013-05-06 | 2013-08-14 | 中铁二十四局集团安徽工程有限公司 | Large-span non-floor type cast-in-place beam falsework and construction method thereof |
| CN203270461U (en) * | 2013-04-27 | 2013-11-06 | 中国建筑第六工程局有限公司 | Bailey beam support without buttress in soft foundation |
| CN104963295A (en) * | 2015-07-27 | 2015-10-07 | 中铁九局集团第二工程有限公司 | Support frame for non-ground internal-force balanced cast-in-place beam and construction method thereof |
| KR101580118B1 (en) * | 2015-06-12 | 2015-12-29 | (주)에이치엔피테크 | Aqueduct and installation methods thereof |
| CN106087746A (en) * | 2016-06-14 | 2016-11-09 | 江苏燕宁建设工程有限公司 | A kind of cast-in-situ box girder falsework construction method and bridge |
-
2017
- 2017-05-02 CN CN201710302171.3A patent/CN107190986A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203270461U (en) * | 2013-04-27 | 2013-11-06 | 中国建筑第六工程局有限公司 | Bailey beam support without buttress in soft foundation |
| CN103243652A (en) * | 2013-05-06 | 2013-08-14 | 中铁二十四局集团安徽工程有限公司 | Large-span non-floor type cast-in-place beam falsework and construction method thereof |
| KR101580118B1 (en) * | 2015-06-12 | 2015-12-29 | (주)에이치엔피테크 | Aqueduct and installation methods thereof |
| CN104963295A (en) * | 2015-07-27 | 2015-10-07 | 中铁九局集团第二工程有限公司 | Support frame for non-ground internal-force balanced cast-in-place beam and construction method thereof |
| CN106087746A (en) * | 2016-06-14 | 2016-11-09 | 江苏燕宁建设工程有限公司 | A kind of cast-in-situ box girder falsework construction method and bridge |
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Application publication date: 20170922 |