CN114481841A - Bridge bottom plate pouring method - Google Patents
Bridge bottom plate pouring method Download PDFInfo
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- CN114481841A CN114481841A CN202111632431.6A CN202111632431A CN114481841A CN 114481841 A CN114481841 A CN 114481841A CN 202111632431 A CN202111632431 A CN 202111632431A CN 114481841 A CN114481841 A CN 114481841A
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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
- 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
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- Structural Engineering (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bridge bottom plate pouring method, which comprises the following steps: the pouring sequence of the whole concrete is gradually carried out from two ends to the middle; pouring concrete on the support, and performing transverse concrete construction; when concrete is poured, the box girder is pushed forwards along the cross section of the structure by a slope layer according to the heights of the bottom plate and the web plate of the box girder; the pouring sequence is to pour the beam bottom plate, the web plate and the top plate in sequence during the construction of the box girder. According to the method, the pouring sequence of the concrete is controlled, the pouring sequence of the whole concrete is adopted, the pouring is gradually carried out from two ends to the middle, the pouring is carried out forward along the cross section of the structure by the slope layer according to the heights of the bottom plate and the web plate of the box girder when the concrete is poured, and the pouring sequence is a construction pouring method for pouring the bottom plate, the web plate and the top plate of the girder in sequence when the box girder is constructed, so that the deformation and the position deviation after the concrete is formed are controlled, the construction quality is guaranteed, the project delivery cycle is ensured, and the economic loss is avoided.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a pouring method of a bridge bottom plate.
Background
The bridge is generally a structure which is erected on rivers, lakes and seas and allows vehicles, pedestrians and the like to smoothly pass through. In order to adapt to the modern high-speed developed traffic industry, bridges are also extended to be constructed to span mountain stream, unfavorable geology or meet other traffic needs, so that the buildings are convenient to pass. The bridge generally comprises an upper structure, a lower structure, a support and an auxiliary structure, wherein the upper structure is also called a bridge span structure and is a main structure for spanning obstacles; the lower structure comprises a bridge abutment, a bridge pier and a foundation; the support is a force transmission device arranged at the supporting positions of the bridge span structure and the bridge pier or the bridge abutment; the auxiliary structures refer to bridge end butt straps, tapered revetments, diversion works and the like.
In the existing bridge bottom plate pouring method, a fixed concrete pouring sequence is not available, and the deformation and the position deviation after the concrete is formed are not easy to control in the construction process, so that the engineering quality cannot be guaranteed, the engineering delivery cycle is influenced, and economic loss is caused.
Disclosure of Invention
The invention mainly aims to provide a bridge bottom plate pouring method, and aims to solve the technical problems that in the prior art, the deformation and the position deviation of formed concrete are not easy to control, so that the engineering quality cannot be guaranteed, the engineering delivery cycle is influenced, and the economic loss is caused.
In order to achieve the purpose, the invention provides a bridge bottom plate pouring method, which comprises the following steps:
the pouring sequence of the whole concrete is gradually carried out from two ends to the middle;
pouring concrete on the support, and performing transverse concrete construction;
when concrete is poured, the box girder is pushed forwards along the cross section of the structure by a slope layer according to the heights of the bottom plate and the web plate of the box girder;
the pouring sequence is to pour the beam bottom plate, the web plate and the top plate in sequence during the construction of the box girder.
In one embodiment, the method for the casting sequence of the integral concrete from two ends to the middle comprises the following steps:
adopting a construction process of horizontal layering and oblique sectioning;
the thickness of the horizontal layering is less than or equal to 300 mm;
the inclination of the oblique sections is 1: 4-1: 5.
In one embodiment, the method for the casting sequence of the integral concrete from two ends to the middle comprises the following steps:
pumping concrete to the bridge floor by using a delivery pump;
when the concrete is poured from a high place, the concrete is conveyed by a chute, so that the free pouring height is less than or equal to 2 m.
In one embodiment, the method for casting concrete on the support and performing transverse concrete construction includes:
the distribution principle of the transverse concrete is symmetrical construction, balanced construction and synchronous construction.
In one embodiment, the method for advancing the concrete along the cross section of the structure in a slope layer according to the heights of the bottom plate and the web plate of the box girder comprises the following steps:
in the pouring process of advancing the slope layer, the inclination angle of the slope layer is 20-25 degrees.
In one embodiment, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
when the beam bottom plate is poured, the web plate is blanked and vibrated;
and if the blanking of the web plates cannot meet the concrete amount of the bottom plate, blanking from a reserved hole of the top plate inner die of each box.
In one embodiment, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
after the beam bottom plate and the web plate are poured, the external attached vibrator is adopted to be matched with vibration.
In one embodiment, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
when pouring the web concrete, the periphery of the feeding hole is covered by the discharging steel plate.
In one embodiment, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
the concrete at the web plate is vibrated by adopting an inserted vibrator;
and (3) vibrating and compacting at the chamfer angles of the web and the beam bottom plate, and after pouring the web concrete, not vibrating the bottom plate concrete.
In one embodiment, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
when the vibrating rod vibrates concrete, the embedded object, the prestressed pipeline and the template are not contacted, so that the structure is prevented from being displaced and deformed.
According to the technical scheme, the pouring sequence of the concrete is controlled, the pouring sequence of the integral concrete is adopted, the pouring is gradually carried out from two ends to the middle, the pouring is carried out forward along the cross section of the structure by the slope layer according to the heights of the bottom plate and the web plate of the box girder when the concrete is poured, and the pouring sequence is a construction pouring method for pouring the bottom plate, the web plate and the top plate of the girder in sequence when the box girder is constructed, so that the deformation and the position deviation after the concrete is formed are controlled, the construction quality is guaranteed, the project delivery cycle is ensured, and the economic loss is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a bridge bottom plate pouring method of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as the upper, lower, left, right, front and rear bridge floor pouring methods) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B", including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a bridge bottom plate pouring method, which is specifically described below with reference to fig. 1.
In an embodiment of the present invention, as shown in fig. 1, the bridge floor pouring method includes the following steps:
s1: the pouring sequence of the whole concrete is gradually carried out from two ends to the middle;
s2: pouring concrete on the support, and performing transverse concrete construction;
s3: when concrete is poured, the box girder is pushed forwards along the cross section of the structure by a slope layer according to the heights of the bottom plate and the web plate of the box girder;
s4: the pouring sequence is to pour the beam bottom plate, the web plate and the top plate in sequence during the construction of the box girder.
It should be noted that, in the cast-in-place construction process of a bridge, according to the disclosure of the present invention, a person skilled in the art can easily think of the specific structure and specific steps of installing the form at each position to be poured before pouring concrete.
It is worth noting that during construction, a specially assigned person pays attention to observe the stability of the bottom plate concrete, and the phenomenon that the mortar is turned over due to the falling of the web plate concrete is prevented, so that diseases are caused. And strictly forbidding the vibrating rod to touch the corrugated pipe and the template in the vibrating process. When the concrete is tamped in the pre-buried steel plate of the support, a vibrating rod with a small head diameter is adopted, and the times are increased properly and the vibrating time is prolonged.
Further, the method for gradually carrying out the pouring sequence of the integral concrete from two ends to the middle comprises the following steps:
s101: adopting a construction process of horizontal layering and oblique sectioning;
s102: the thickness of the horizontal layering is less than or equal to 300 mm;
s103: the inclination of the oblique sections is 1: 4-1: 5.
It should be noted that, enough tie bars should be provided between the upper and lower layers of the steel bars of the top plate or the bottom plate of the beam to prevent the steel bar mesh from deforming.
Further, the method for gradually carrying out the pouring sequence of the integral concrete from two ends to the middle comprises the following steps:
s1001: pumping concrete to the bridge floor by using a delivery pump;
s1002: when the concrete is poured from a high place, the concrete is conveyed by a chute, so that the free pouring height is less than or equal to 2 m.
It should be noted that cracks often appear at the manhole, chamfer, and other parts of the box girder due to stress concentration, and anti-crack reinforcing steel bars need to be added at these parts during construction.
Further, the method for casting concrete on the bracket and performing transverse concrete construction comprises the following steps:
s201: the distribution principle of the transverse concrete is symmetrical construction, balanced construction and synchronous construction.
By adopting the method to carry out concrete construction, deviation and deformation exceeding the allowable range are avoided.
Further, the method for advancing along the cross section of the structure in a slope layer according to the heights of the bottom plate and the web plate of the box girder during concrete pouring comprises the following steps:
s301: in the pouring process of advancing the slope layer, the inclination angle of the slope layer is 20-25 degrees.
Further, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
s401: when the beam bottom plate is poured, the web plate is blanked and vibrated;
and if the blanking of the web plates cannot meet the concrete amount of the bottom plate, blanking from a reserved hole of the top plate inner die of each box.
It is worth noting that during construction, a specially assigned person pays attention to observe the stability of the bottom plate concrete, and the phenomenon that the mortar is turned over due to the falling of the web plate concrete is prevented, so that diseases are caused. And strictly forbidding the vibrating rod to touch the corrugated pipe and the template in the vibrating process. When the concrete is tamped in the pre-buried steel plate of the support, a vibrating rod with a small head diameter is adopted, and the times are increased properly and the vibrating time is prolonged.
Further, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
s4001: after the beam bottom plate and the web plate are poured, the external attached vibrator is adopted to be matched with vibration.
According to the method, the web plate and the beam bottom plate are vibrated, and the forming quality of concrete at the positions of the web plate and the beam bottom plate support is ensured.
Further, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
s4010: when pouring the web concrete, the periphery of the feeding hole is covered by the discharging steel plate.
By adopting the method, loose concrete can be prevented from remaining on the roof when the web concrete is poured, and the phenomenon that the top plate is easy to generate honeycombs because the concrete is initially set when the top plate concrete is to be poured is prevented.
Further, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
s410: the concrete at the web plate is vibrated by adopting an inserted vibrator;
s420: and (3) vibrating and compacting at the chamfer angles of the web and the beam bottom plate, and after pouring the web concrete, not vibrating the bottom plate concrete.
It should be noted that the duration of the vibration is based on the disappearance of the surface-grouting bubbles when the concrete obtains good compactness. During pouring, each pump truck is matched with two groups of 8 vibrating personnel, and each group is provided with 4 plug-in vibrating rods. In consideration of the workload and the working strength during vibration operation, each group of people is replaced by another group of people after working for 6 hours, and the operation is repeated in such a way, each group of the vibration personnel is divided into two groups of people, 4 people are in each group, the two groups of people use 5m as a boundary point, the vibration range of the second group of the repeated vibration personnel at the boundary point is 0.5m in front of and behind the boundary point, and vibration leakage is avoided.
Further, the method for sequentially pouring the beam bottom plate, the web plate and the top plate during the box girder construction comprises the following steps:
s4100: when the vibrating rod vibrates concrete, the vibrating rod cannot touch the buried object, the prestressed pipeline and the template so as to prevent the structure from displacing and deforming.
It is worth noting that the small-head diameter vibrating rod is used during vibrating, so that the steel bar, the corrugated pipe and the template cannot be touched. The vibration of the cross beam is monitored and checked by a responsible person in site construction, so that the vibration is compact. A specially assigned person for the prestressed pipeline adopts a plastic pipe or a spherical cone to continuously dredge the prestressed pipeline so as to prevent blockage.
According to the method, the pouring sequence of the concrete is controlled, the pouring sequence of the whole concrete is adopted, the pouring is gradually carried out from two ends to the middle, the pouring is carried out forward along the cross section of the structure by the slope layer according to the heights of the bottom plate and the web plate of the box girder when the concrete is poured, and the pouring sequence is a construction pouring method for pouring the bottom plate, the web plate and the top plate of the girder in sequence when the box girder is constructed, so that the deformation and the position deviation after the concrete is formed are controlled, the construction quality is guaranteed, the project delivery cycle is ensured, and the economic loss is avoided.
The concrete implementation steps of the bridge bottom plate pouring method refer to the above embodiments, and the bridge bottom plate pouring method adopts all the technical schemes of all the above embodiments, so that the bridge bottom plate pouring method at least has all the beneficial effects brought by the technical schemes of the above embodiments, and further description is omitted.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The bridge bottom plate pouring method is characterized by comprising the following steps:
the pouring sequence of the whole concrete is gradually carried out from two ends to the middle;
pouring concrete on the support, and performing transverse concrete construction;
when concrete is poured, the box girder is pushed forwards along the cross section of the structure by a slope layer according to the heights of the bottom plate and the web plate of the box girder;
the pouring sequence is to pour the beam bottom plate, the web plate and the top plate in sequence during the construction of the box girder.
2. The method for pouring the bridge bottom plate according to claim 1, wherein the step-by-step pouring sequence of the integral concrete from two ends to the middle comprises the following steps:
adopting a construction process of horizontal layering and oblique sectioning;
the thickness of the horizontal layering is less than or equal to 300 mm;
the inclination of the oblique sections is 1: 4-1: 5.
3. The bridge floor pouring method according to claim 2, wherein the step-by-step pouring sequence of the integral concrete from two ends to the middle comprises the following steps:
pumping concrete to the bridge floor by using a delivery pump;
when the concrete is poured from a high place, the concrete is conveyed by a chute, so that the free pouring height is less than or equal to 2 m.
4. The bridge floor pouring method according to claim 2 or 3, wherein the concrete is poured on the support, and the method for performing transverse concrete construction comprises the following steps:
the distribution principle of the transverse concrete is symmetrical construction, balanced construction and synchronous construction.
5. A method according to claim 2 or 3, wherein the method of advancing the concrete along the cross-section of the structure in a ramp layer at the height of the bottom plate and the web of the box girder comprises:
in the pouring process of advancing the slope layer, the inclination angle of the slope layer is 20-25 degrees.
6. The pouring method of the bridge bottom plate according to claim 2 or 3, wherein the pouring sequence during the box girder construction is that the beam bottom plate, the web plate and the top plate are poured in sequence, and the method comprises the following steps:
when the beam bottom plate is poured, the web plate is blanked and vibrated;
and if the blanking of the web plates cannot meet the concrete amount of the bottom plate, blanking from a reserved hole of the top plate inner die of each box.
7. The pouring method of the bridge bottom plate according to claim 6, wherein the pouring sequence during the box girder construction is that the beam bottom plate, the web plate and the top plate are poured in sequence, and the method comprises the following steps:
after the beam bottom plate and the web plate are poured, the external attached vibrator is adopted to be matched with vibration.
8. The pouring method of the bridge bottom plate according to claim 7, wherein the pouring sequence during the box girder construction is that the beam bottom plate, the web plate and the top plate are poured in sequence, and the method comprises the following steps:
when pouring the web concrete, the periphery of the feeding hole is covered by the discharging steel plates.
9. The pouring method of the bridge bottom plate according to claim 8, wherein the pouring sequence during the box girder construction is that the beam bottom plate, the web plate and the top plate are poured in sequence, and the method comprises the following steps:
the concrete at the web plate is vibrated by adopting an inserted vibrator;
and (3) vibrating and compacting at the chamfer angles of the web and the beam bottom plate, and after pouring the web concrete, not vibrating the bottom plate concrete.
10. The pouring method of the bridge bottom plate according to claim 9, wherein the pouring sequence during the box girder construction is that the beam bottom plate, the web plate and the top plate are poured in sequence, and the method comprises the following steps:
when the vibrating rod vibrates concrete, the embedded object, the prestressed pipeline and the template are not contacted, so that the structure is prevented from being displaced and deformed.
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| CN202111632431.6A CN114481841A (en) | 2021-12-28 | 2021-12-28 | Bridge bottom plate pouring method |
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| CN202111632431.6A CN114481841A (en) | 2021-12-28 | 2021-12-28 | Bridge bottom plate pouring method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974885A (en) * | 2010-10-26 | 2011-02-16 | 中交一航局第四工程有限公司 | Concrete one-step molding construction method for railway continuous-box beam multi-slope heightening platform |
| CN104742252A (en) * | 2015-02-17 | 2015-07-01 | 中交一航局第四工程有限公司 | Construction technology for guiding concreting through insertion bars |
| CN108951425A (en) * | 2018-07-12 | 2018-12-07 | 宁波市建设集团股份有限公司 | Cast-in-situ prestressed concrete continuous box girder primary concreting molding construction method |
| CN113430942A (en) * | 2021-06-25 | 2021-09-24 | 中铁十九局集团第五工程有限公司 | Construction method for pouring box girder concrete |
-
2021
- 2021-12-28 CN CN202111632431.6A patent/CN114481841A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974885A (en) * | 2010-10-26 | 2011-02-16 | 中交一航局第四工程有限公司 | Concrete one-step molding construction method for railway continuous-box beam multi-slope heightening platform |
| CN104742252A (en) * | 2015-02-17 | 2015-07-01 | 中交一航局第四工程有限公司 | Construction technology for guiding concreting through insertion bars |
| CN108951425A (en) * | 2018-07-12 | 2018-12-07 | 宁波市建设集团股份有限公司 | Cast-in-situ prestressed concrete continuous box girder primary concreting molding construction method |
| CN113430942A (en) * | 2021-06-25 | 2021-09-24 | 中铁十九局集团第五工程有限公司 | Construction method for pouring box girder concrete |
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