CN106320180A - Porous continuous beam symmetric span-by-span pouring construction method - Google Patents
Porous continuous beam symmetric span-by-span pouring construction method Download PDFInfo
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- CN106320180A CN106320180A CN201610809010.9A CN201610809010A CN106320180A CN 106320180 A CN106320180 A CN 106320180A CN 201610809010 A CN201610809010 A CN 201610809010A CN 106320180 A CN106320180 A CN 106320180A
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- cast
- prestress wire
- prestress
- tension
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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Abstract
The invention provides a porous continuous beam symmetric span-by-span pouring construction method. The method includes the steps that a first cast-in-place section of a beam body is formed, and prestressed steel strands are tensioned; second cast-in-place sections of the beam body are formed on the two sides of the first cast-in-place section respectively, and prestressed steel strands in the second cast-in-place sections are tensioned; the former step is repeated till pouring construction of all the remaining cast-in-place sections is completed; full-length prestressed steel strands penetrate; the whole bundle of full-length prestressed steel strands is tensioned; pouring construction is completed. The method has the advantages that cost is low, wherein the support erection process is simple, construction is rapid, the construction period is guaranteed, supports can be used for other engineering construction after being detached, and the material recovery rate can reach 99%; overall stability is high, wherein the supports are overall prepressed, and settling controllability is high; concrete one-time pouring mechanical performance is guaranteed, prestress single-span tensioning, connector jointing in length and finally overall tensioning are carried out, and the overall stability of the beam body is high.
Description
Technical field
The invention belongs to continuous beam construction method technical field, particularly relate to a kind of porous continuous beam symmetry and pour by cross
Construction method.
Background technology
At present, the common pouring construction method of porous continuous beam can be divided into support cast-in-place method and Hanging Basket cantilever method, wherein,
The cast-in-place fado of frame is used for porous continuous beam, although support cast-in-place method is more flexible, but the beam seam that intermediate demand is reserved is more, because of
The globality of this beam body is bad.Hanging Basket cantilever fado is used for large-span continuous beam, but shortcoming is subject to conditions more, is unsuitable for
Nonprismatic continuous beam.
Summary of the invention
In order to solve the problems referred to above, it is an object of the invention to provide a kind of porous continuous beam symmetry pouring construction side by cross
Method.
In order to achieve the above object, the porous continuous beam symmetry pouring construction method by cross that the present invention provides includes in order
The following step carried out:
1) set up the strutting system of the first Cast-in-Situ Segment, carry out pre-pressing bracket after having set up, to eliminate inelastic deformation, so
After install template, colligation beam body steel reinforcement cage, and along the pre-buried many prestress steel twists of porous continuous beam length direction in steel reinforcement cage
Spool road, a portion pipeline is used for subsection tension, and another part pipeline is used for integral tension, many for subsection tension
Penetrating subsection tension prestress wire in root prestress wire pipeline, casting concrete in template, treats coagulation afterwards
Forming the beam body of the first Cast-in-Situ Segment after soil solidification, after maintenance, it is carried out by the two ends from above-mentioned subsection tension prestress wire
Stretch-draw, utilizes adapter to be fixed at the two ends of subsection tension prestress wire after stretch-draw；Then vacuum pump suction is used
Above-mentioned air in the prestress wire pipeline of subsection tension, afterwards at the above-mentioned prestress steel twist for subsection tension
One end grouting pump in spool road pours into cement mortar, until being full of the whole piece prestress wire pipeline for subsection tension；
2) set up the strutting system of the second Cast-in-Situ Segment in the both sides of the first Cast-in-Situ Segment respectively, carry out support after having set up pre-
Pressure, to eliminate inelastic deformation, then installs template, colligation beam body steel reinforcement cage, and along porous continuous beam length in steel reinforcement cage
The pre-buried many prestress wire pipelines corresponding with prestress wire pipeline on the first Cast-in-Situ Segment in direction, a portion
Pipeline is used for subsection tension, and another part pipeline is used for integral tension, at the many prestress steel twist spools for subsection tension
Road penetrates subsection tension prestress wire, afterwards by above-mentioned subsection tension prestress wire with the first Cast-in-Situ Segment
Adjacent the inner is fixed on adapter corresponding on the first Cast-in-Situ Segment, and then casting concrete in template, treats concrete
Form the beam body of the second Cast-in-Situ Segment after solidification, use from the outer end of the second Cast-in-Situ Segment to the subsection tension in the second Cast-in-Situ Segment after maintenance
Prestress wire carries out stretch-draw, utilizes adapter to be fixed the outer end of subsection tension prestress wire after stretch-draw；So
Rear employing vacuum pump aspirates above-mentioned air in the prestress wire pipeline of subsection tension, afterwards above-mentioned for segmentation
The outer end grouting pump of the prestress wire pipeline of stretch-draw pours into cement mortar, should for the pre-of subsection tension until being full of whole piece
Power steel strand wires pipeline；
3) step 2 is repeated), until completing the pouring construction process of remaining all Cast-in-Situ Segment；
4) on bridge floor, make elongated steel strand wires as lead-in wire, then by above-mentioned lead-in wire from be positioned at outermost one cast-in-place
Duan Jing causes opposite side for the prestress wire pipeline of integral tension, is led to one end of the most elongated prestress wire
Cross adapter to be connected on the rear end of lead-in wire, drop above-mentioned elongated prestress wire through pre-by hoist engine tow lead afterwards
Prestress steel strand pipeline and complete lashing construction；
5) after intensity and elastic modelling quantity all reach design requirement, elongated prestress wire stretching construction is carried out, first
Several elongated prestress wire pretension one by one to simultaneous tension, to ensure each the single elongated prestressing force in same anchorage
Steel strand wires degree of tightness before stretch-draw is consistent, whole Shu Tongchang prestress wire carries out both-end subsequently and synchronizes symmetrical stretch-draw simultaneously, adopt
Controlling to be main in order to tension stress, it is auxiliary stretch-draw dual control method that stretch value is checked, and carries out sealing off and covering anchorage until meeting after design requires；
6) carry out mortar depositing construction in the 48h after tensioning anchor seal has been constructed, first use vacuum pump suction prestress steel twist
Air in spool road, then the other end grouting pump at prestress wire pipeline pours into cement mortar, until being full of whole piece
Prestress wire pipeline can complete mortar depositing construction process.
Described elongated prestress wire is made up of 13 bundle prestress wires.
The porous continuous beam symmetry pouring construction method by cross that the present invention provides has the advantage that
(1) cost is low: it is simple that technique set up by support, and quickly, the duration is secure, is used equally to other after dismounting in construction
Engineering construction, MAT'L recycling rate can reach 99%.
(2) stability in the large is strong: support entirety precompressed, and sedimentation controllability is strong；Once-pouring of concrete mechanical property obtains
To ensureing, prestressing force single span stretch-draw, adapter spreading, last integral tension, beam body stability in the large is strong.
(3) Stability Analysis of Structures: when using Support Method to carry out prestressed continuous beam construction, there is structure system transform does not occur,
The advantages such as not causing dead load to creep, prestress wire is once arranged, single span concentrates stretch-draw, and point bridging is long, full-bridge integral tension.
(4) strong adaptability: horizontal layout can be carried out according to Different Plane shape and size, flexible and changeable.
(5) continuity is good: beam body symmetry is the most cast-in-place, and reserved beam seam is less, and integral tension, beam body continuity is preferable.
Accompanying drawing explanation
The porous continuous beam symmetry that Fig. 1 provides for utilizing the present invention is process signal time pouring construction method is constructed by cross
Figure.
Detailed description of the invention
The porous continuous beam symmetry pouring construction method by cross with specific embodiment, the present invention provided below in conjunction with the accompanying drawings
It is described in detail.
As it is shown in figure 1, what the symmetrical pouring construction method by cross of porous continuous beam that the present invention provides included carrying out in order
The following step:
1) set up the strutting system of the first Cast-in-Situ Segment 1, after having set up, carry out pre-pressing bracket, to eliminate inelastic deformation,
Then template is installed, colligation beam body steel reinforcement cage, and along the pre-buried many prestress steels of porous continuous beam length direction in steel reinforcement cage
Twisted wire pipeline, a portion pipeline is used for subsection tension, and another part pipeline is used for integral tension, for subsection tension
Many prestress wire pipelines penetrate subsection tension prestress wire, afterwards casting concrete in template, waits to mix
The beam body of the first Cast-in-Situ Segment 1 is formed, from the two ends of above-mentioned subsection tension prestress wire to it after maintenance after solidifying soil solidification
Carry out stretch-draw, after stretch-draw, utilize adapter to be fixed at the two ends of subsection tension prestress wire；Then vacuum pump is used
Aspirate above-mentioned air in the prestress wire pipeline of subsection tension, afterwards at the above-mentioned prestressing force for subsection tension
One end grouting pump of steel strand wires pipeline pours into cement mortar, until being full of the whole piece prestress steel twist spool for subsection tension
Road；
2) both sides at the first Cast-in-Situ Segment 1 set up the strutting system of the second Cast-in-Situ Segment 2 respectively, carry out support after having set up
Precompressed, to eliminate inelastic deformation, then installs template, colligation beam body steel reinforcement cage, and along the continuous beam length of porous in steel reinforcement cage
The pre-buried many prestress wire pipelines corresponding with prestress wire pipeline on the first Cast-in-Situ Segment 1 in degree direction, Qi Zhongyi
Section of tubing is used for subsection tension, and another part pipeline is used for integral tension, at the many prestress steel twists for subsection tension
Spool road penetrates subsection tension prestress wire, afterwards by existing with first on above-mentioned subsection tension prestress wire
The inner that the section of watering 1 is adjacent is fixed on adapter corresponding on the first Cast-in-Situ Segment 1, and then casting concrete in template, treats
The beam body of the second Cast-in-Situ Segment 2 is formed, from the outer end of the second Cast-in-Situ Segment 2 in the second Cast-in-Situ Segment 2 after maintenance after concrete setting
Subsection tension prestress wire carries out stretch-draw, utilizes adapter by the outer end of subsection tension prestress wire after stretch-draw
Fix；Then vacuum pump is used to aspirate above-mentioned air in the prestress wire pipeline of subsection tension, afterwards upper
The outer end grouting pump stating the prestress wire pipeline for subsection tension pours into cement mortar, until being full of whole piece for segmentation
The prestress wire pipeline of stretch-draw；
3) step 2 is repeated), until completing the pouring construction process of remaining all Cast-in-Situ Segment；
4) on bridge floor, make elongated steel strand wires as lead-in wire, then by above-mentioned lead-in wire from be positioned at outermost one cast-in-place
Duan Jing causes opposite side for the prestress wire pipeline of integral tension, is led to one end of the most elongated prestress wire
Cross adapter to be connected on the rear end of lead-in wire, drop above-mentioned elongated prestress wire through pre-by hoist engine tow lead afterwards
Prestress steel strand pipeline and complete lashing construction；
5) after intensity and elastic modelling quantity all reach design requirement, elongated prestress wire stretching construction is carried out, first
Several elongated prestress wire pretension one by one to simultaneous tension, to ensure each the single elongated prestressing force in same anchorage
Steel strand wires degree of tightness before stretch-draw is consistent, whole Shu Tongchang prestress wire carries out both-end subsequently and synchronizes symmetrical stretch-draw simultaneously, adopt
Controlling to be main in order to tension stress, it is auxiliary stretch-draw dual control method that stretch value is checked, and carries out sealing off and covering anchorage until meeting after design requires；
6) carry out mortar depositing construction in the 48h after tensioning anchor seal has been constructed, first use vacuum pump suction prestress steel twist
Air in spool road, then the other end grouting pump at prestress wire pipeline pours into cement mortar, until being full of whole piece
Prestress wire pipeline can complete mortar depositing construction process.
Described elongated prestress wire is made up of 13 bundle prestress wires.
Claims (2)
1. a porous continuous beam symmetry pouring construction method by cross, it is characterised in that: described construction method includes in order
The following step carried out:
1) set up the strutting system of the first Cast-in-Situ Segment (1), carry out pre-pressing bracket after having set up, to eliminate inelastic deformation, so
After install template, colligation beam body steel reinforcement cage, and along the pre-buried many prestress steel twists of porous continuous beam length direction in steel reinforcement cage
Spool road, a portion pipeline is used for subsection tension, and another part pipeline is used for integral tension, many for subsection tension
Penetrating subsection tension prestress wire in root prestress wire pipeline, casting concrete in template, treats coagulation afterwards
The beam body of the first Cast-in-Situ Segment (1) is formed, from the two ends of above-mentioned subsection tension prestress wire to it after maintenance after soil solidification
Carry out stretch-draw, after stretch-draw, utilize adapter to be fixed at the two ends of subsection tension prestress wire；Then vacuum pump is used
Aspirate above-mentioned air in the prestress wire pipeline of subsection tension, afterwards at the above-mentioned prestressing force for subsection tension
One end grouting pump of steel strand wires pipeline pours into cement mortar, until being full of the whole piece prestress steel twist spool for subsection tension
Road；
2) both sides at the first Cast-in-Situ Segment 1 set up the strutting system of the second Cast-in-Situ Segment (2) respectively, carry out support pre-after having set up
Pressure, to eliminate inelastic deformation, then installs template, colligation beam body steel reinforcement cage, and along porous continuous beam length in steel reinforcement cage
The prestress wire pipeline that the pre-buried many prestress wire pipelines upper with the first Cast-in-Situ Segment (1) in direction are corresponding, Qi Zhongyi
Section of tubing is used for subsection tension, and another part pipeline is used for integral tension, at the many prestress steel twists for subsection tension
Spool road penetrates subsection tension prestress wire, afterwards by existing with first on above-mentioned subsection tension prestress wire
The inner that the section of watering (1) is adjacent is fixed on the upper corresponding adapter of the first Cast-in-Situ Segment (1), then pours coagulation in template
Soil, forms the beam body of the second Cast-in-Situ Segment (2) after concrete setting, existing to second from the outer end of the second Cast-in-Situ Segment (2) after maintenance
Subsection tension prestress wire in the section of watering (2) carries out stretch-draw, utilizes adapter by subsection tension prestressing force after stretch-draw
The outer end of steel strand wires is fixed；Then vacuum pump is used to aspirate above-mentioned sky in the prestress wire pipeline of subsection tension
Gas, pours into cement mortar at the above-mentioned outer end grouting pump for the prestress wire pipeline of subsection tension afterwards, until being full of
Whole piece is for the prestress wire pipeline of subsection tension；
3) step 2 is repeated), until completing the pouring construction process of remaining all Cast-in-Situ Segment；
4) on bridge floor, elongated steel strand wires are made as lead-in wire, then by above-mentioned lead-in wire from being positioned at an outermost Cast-in-Situ Segment warp
Prestress wire pipeline for integral tension causes opposite side, the most again by one end of elongated prestress wire by even
Connect device to be connected on the rear end of lead-in wire, drop above-mentioned elongated prestress wire through prestressing force by hoist engine tow lead afterwards
Steel strand wires pipeline and complete lashing construction；
5) after intensity and elastic modelling quantity all reach design requirement, elongated prestress wire stretching construction is carried out, first to same
The several elongated prestress wire pretension one by one of Shi Zhangla, to ensure each the single elongated prestress steel twist in same anchorage
Line degree of tightness before stretch-draw is consistent, whole Shu Tongchang prestress wire carries out both-end subsequently and synchronizes symmetrical stretch-draw simultaneously, use with
It is main that tension stress controls, and it is auxiliary stretch-draw dual control method that stretch value is checked, and carries out sealing off and covering anchorage until meeting after design requires；
6) carry out mortar depositing construction in the 48h after tensioning anchor seal has been constructed, first use vacuum pump suction prestress steel twist spool
Air in road, then the other end grouting pump at prestress wire pipeline pours into cement mortar, in advance should until being full of whole piece
Power steel strand wires pipeline can complete mortar depositing construction process.
Porous continuous beam symmetry pouring construction method by cross the most according to claim 1, it is characterised in that: described is elongated
Prestress wire is made up of 13 bundle prestress wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610809010.9A CN106320180A (en) | 2016-09-08 | 2016-09-08 | Porous continuous beam symmetric span-by-span pouring construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610809010.9A CN106320180A (en) | 2016-09-08 | 2016-09-08 | Porous continuous beam symmetric span-by-span pouring construction method |
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| CN106320180A true CN106320180A (en) | 2017-01-11 |
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|---|---|---|---|
| CN201610809010.9A Pending CN106320180A (en) | 2016-09-08 | 2016-09-08 | Porous continuous beam symmetric span-by-span pouring construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227725A (en) * | 2020-11-11 | 2021-01-15 | 中交第四公路工程局有限公司 | Grouting structure of long pore passage of prestressed concrete stiffening beam and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696591A (en) * | 2009-10-27 | 2010-04-21 | 哈尔滨工业大学 | Steel strand connector |
| JP2014051799A (en) * | 2012-09-06 | 2014-03-20 | Sumitomo Mitsui Construction Co Ltd | Construction method for column head |
| CN104831639A (en) * | 2015-05-13 | 2015-08-12 | 中建六局土木工程有限公司 | Consolidation and release construction method for 0# blocks of ultra-wide non-uniform continuous beam |
-
2016
- 2016-09-08 CN CN201610809010.9A patent/CN106320180A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696591A (en) * | 2009-10-27 | 2010-04-21 | 哈尔滨工业大学 | Steel strand connector |
| JP2014051799A (en) * | 2012-09-06 | 2014-03-20 | Sumitomo Mitsui Construction Co Ltd | Construction method for column head |
| CN104831639A (en) * | 2015-05-13 | 2015-08-12 | 中建六局土木工程有限公司 | Consolidation and release construction method for 0# blocks of ultra-wide non-uniform continuous beam |
Non-Patent Citations (2)
| Title |
|---|
| 岳鹏程等: "通长预应力束张拉对超长多跨连续梁桥应力的影响", 《天津城建大学学报》 * |
| 王参军: "高墩双线变四线道岔连续梁施工技术", 《铁道建筑技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112227725A (en) * | 2020-11-11 | 2021-01-15 | 中交第四公路工程局有限公司 | Grouting structure of long pore passage of prestressed concrete stiffening beam and construction method thereof |
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Application publication date: 20170111 |