CN109083003B - Pier top connecting structure for prefabricated pier and construction method of pier top connecting structure - Google Patents
Pier top connecting structure for prefabricated pier and construction method of pier top connecting structure Download PDFInfo
- Publication number
- CN109083003B CN109083003B CN201811109256.0A CN201811109256A CN109083003B CN 109083003 B CN109083003 B CN 109083003B CN 201811109256 A CN201811109256 A CN 201811109256A CN 109083003 B CN109083003 B CN 109083003B
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- Prior art keywords
- pier
- post
- prefabricated
- pouring belt
- pouring
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- 238000010276 construction Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 66
- 239000010959 steel Substances 0.000 claims abstract description 66
- 238000003466 welding Methods 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000010485 coping Effects 0.000 description 7
- 238000009417 prefabrication Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Classifications
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention relates to the technical field of bridges of highways and railways, in particular to a pier top connecting structure for a prefabricated pier and a construction method thereof, which are characterized in that: the prefabricated pier is assembled along the pier cap, a post-pouring belt groove is reserved on the assembling surface of the pier cap, the depth of the post-pouring belt groove is smaller than the height of the assembling surface of the pier cap, the width of the post-pouring belt groove is smaller than the width of the assembling surface of the pier cap, pre-buried section steel in the pier cap and one end of the section steel stretches into the post-pouring belt groove, and the section steel in the post-pouring belt groove is welded into an integrated structure, and a filler is arranged in the post-pouring belt groove. The invention has the advantages that: the bridge pier structure is simple in structure, the connectivity of bridge piers on two sides of the post-pouring trough is enhanced, and common steel bars densely arranged are replaced by profile steel, so that the construction difficulty is avoided from being increased due to centralized welding of a large number of steel bars; when the post-pouring belt trough is poured, a construction template is not required to be erected, and the method is particularly suitable for on-site connection of the prefabricated pier tops of roads, cities and rail transit.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a pier top connecting structure for a prefabricated pier and a construction method thereof.
Background
The current multi-column pier has few prefabrication schemes, high prefabrication difficulty and mainly adopts a cast-in-situ mode. The common prefabrication construction mode is that the whole pier cap is prefabricated, the prefabrication is performed with a plurality of upright posts, and an upright post joint is added; or a post-pouring strip filling seam is arranged between the adjacent pier caps, overhanging steel bars are inserted into the pier caps and extend into the post-pouring strip filling seam, and then the steel bars in the post-pouring strip filling seam are correspondingly welded in pairs. And (5) supporting and casting concrete in the range of filling the seam of the post-cast strip, so as to connect adjacent pier caps.
The existing pier top connection mode is characterized in that a multi-column prefabricated joint is added, one-time connection is added to the steel bars or the prestressed tendons, and the construction precision and the technological requirements are high; or the number of the overhanging reinforcing steel bars is large, the lap joint task is heavy, a large number of joints are arranged on the post-pouring section, the quality is difficult to guarantee, the construction period of filling joints of the formwork pouring post-pouring belt is long, the construction progress is delayed, and the preliminary purpose of prefabrication is violated.
Disclosure of Invention
According to the defects of the prior art, the invention provides the pier top connecting structure for the prefabricated pier and the construction method thereof, wherein the post-pouring grooved steel is inserted into one end of the pre-embedded pier cap, and the post-pouring grooved steel is welded into an integrated structure, so that the connectivity of the piers on two sides of the post-pouring grooved steel is enhanced, the prefabrication splicing difficulty is reduced, the common steel bars densely arranged are replaced by the steel bars, and the construction difficulty is prevented from being increased due to concentrated welding of a large number of steel bars.
The invention is realized by the following technical scheme:
the utility model provides a pier top connection structure for prefabricated pier, includes two prefabricated piers, prefabricated pier includes the stand and is located pier cap at stand top, its characterized in that: the prefabricated pier is assembled along the pier cap, a post-pouring belt groove is reserved on the assembling surface of the pier cap, the depth of the post-pouring belt groove is smaller than the height of the assembling surface of the pier cap, the width of the post-pouring belt groove is smaller than the width of the assembling surface of the pier cap, pre-buried section steel in the pier cap and one end of the section steel stretches into the post-pouring belt groove, and the section steel in the post-pouring belt groove is welded into an integrated structure, and a filler is arranged in the post-pouring belt groove.
And the profile steel is pre-embedded at the top of the upright post, and the profile steel in the pier cap are stiffened through the reinforcing member.
And a plurality of shear nails are fixed on the surface of the section steel.
The filler is micro-expansion concrete.
The construction method of the pier top connecting structure for the prefabricated pier comprises the prefabricated pier column and the prefabricated pier cap and is characterized in that: splicing along the post-pouring belt grooves, and butt welding the section steel extending into the post-pouring belt grooves; and pouring micro-expansive concrete into the post-pouring belt groove to form a post-pouring belt so as to connect the pier tops of the two precast piers into a whole.
And fixing a plurality of shear nails on the surface of the section steel in the pier cap and the section steel in the pier column.
The invention has the advantages that: the structure is simple, the construction is convenient, the connectivity of piers on two sides of the post-pouring trough is enhanced, and the common steel bars densely arranged are replaced by the section steel, so that the construction difficulty increase caused by centralized welding of a large number of steel bars is reduced; when the post-pouring belt trough is poured, a construction template is not required to be erected, the construction period is shortened, and the method is particularly suitable for on-site connection of the tops of prefabricated piers in roads, cities and rail transit.
Drawings
FIG. 1 is an elevation view of a pier according to the present invention;
FIG. 2 is an elevation view A-A of FIG. 1;
FIG. 3 is a B-B elevation of FIG. 1;
FIG. 4 is a plan view of the coping of the present invention.
Detailed Description
The features of the invention and other related features are described in further detail below by way of example in conjunction with the following figures to facilitate understanding by those skilled in the art:
as shown in fig. 1-4, the labels 1-11 are shown as: the bridge pier comprises a prefabricated bridge pier 1, upright posts 2, pier caps 3, post-pouring belt grooves 4, section steel 5, micro-expansion concrete 6, section steel 7, reinforcing members 8, shear nails 9, a bottom plate 10 and side plates 11.
Examples: the embodiment relates to a pier top connecting structure for a prefabricated pier 1 and a construction method thereof, which are particularly used for on-site connection of prefabricated pier tops of roads, cities and rail transit.
As shown in fig. 1, the structure comprises two symmetrically arranged prefabricated piers 1, wherein each prefabricated pier 1 comprises a vertical column 2 and a horizontally arranged pier cap 3, and the prefabricated piers 1 are assembled along the pier caps 3.
As shown in fig. 1, the pier cap 3 is covered on the upright post 2, so that the larger concentrated force transmitted by the bridge support is dispersed and uniformly transmitted to the upright post 2. The pillar 2 supports the coping 3 and transmits an upper load to the foundation. When the stand 2 is prefabricated in the mill, pre-buried in the top of stand 2 shaped steel 5, shaped steel 5 is vertical to be arranged for anchor shaped steel 7, guarantees to give stand 2 with the upper portion load on the pier cap 3 effective transmission. The section steel 7 is embedded in the pier cap 3, the section steel 7 is horizontally arranged and used for resisting the bending moment effect generated by gravity load, bearing the tensile force and increasing the bearing capacity of the pier cap 3. The section steel 7 in the pier cap 3 is connected and anchored with the section steel 5 in the upright post 2, so that the connection strength of the pier cap 3 and the upright post 2 is enhanced.
As shown in fig. 1, 2 and 4, when prefabricating the coping 3, a post-pouring groove 4 is reserved at the splicing surface, the depth of the post-pouring groove 4 is smaller than the height of the coping 3 at the splicing surface, the width of the post-pouring groove 4 is smaller than the width of the coping 3 at the splicing surface, the part where the coping 3 and the bottom surface of the post-pouring groove 4 are connected is used as a bottom panel 10 when concrete is poured into the post-pouring groove 4, the part where the coping 3 and the side surface of the post-pouring groove 4 are connected is used as a side panel 11 when concrete is poured into the post-pouring groove 4, a construction template is not required to be erected again when the post-pouring groove 4 is poured, and the construction period is shortened. The post-pouring spout 4 may be U-shaped, circular, rectangular, etc.
And after the two pier caps 3 with the same structure are spliced along the splicing surfaces, the two post-pouring belt grooves 4 are butted to form a pouring range of the post-pouring belt, and micro-expansion concrete 6 is filled in the range of the post-pouring belt grooves 4, so that harmful cracks of the pier caps 3 due to uneven self shrinkage or uneven settlement are prevented. The section steel 7 in the pier cap 3 stretches into the post-pouring belt groove 4, and the section steel 7 in the pier caps 3 at two sides of the post-pouring belt groove 4 is fixed in butt welding mode, so that the section steel 7 embedded in the pier caps 3 of the two prefabricated piers 1 is connected and fixed into a whole, and the connection strength and the stability of the pier top connection of the prefabricated piers are improved. At this time, the section steel 7 is adopted to replace the common steel bars which are densely arranged, so that the construction difficulty caused by centralized welding of a large number of steel bars is reduced.
The embodiment comprises the following construction methods in specific construction:
1) The prefabricated two prefabricated piers 1 are prefabricated to the site and arranged at specified positions. The post-pouring belt grooves 4 of the two precast pier 1 are positioned correspondingly to form the post-pouring belt range of the pier top of the precast pier 1.
2) And butt welding the section steel 7 extending into the post-pouring belt groove 4 into a whole, and welding to construct the common steel bar. And then, pouring micro-expansive concrete 6 into the post-pouring belt grooves 4 to form a post-pouring belt so as to connect the pier tops of the two precast piers into a whole.
The embodiment is implemented in specific manner: after the section steel 7 is welded, micro-expansion concrete 6 is poured into the post-pouring belt groove 4 to form a post-pouring belt, and the micro-expansion property of the micro-expansion concrete 6 is utilized to compensate the shrinkage of the concrete, so that the concrete crack is prevented and controlled, and the connection integrity of pier caps 3 at two sides of the post-pouring belt groove 4 is enhanced.
The section steel 5 and the section steel 7 are connected and reinforced through vertically arranged reinforcing members 8, the reinforcing members 8 can be stiffening ribs or stiffening plates, the reinforcing members 8 ensure that the section steel 5 and the section steel 7 act together, and the force transmitted by the upper pier cap 3 is effectively transmitted to the upright post 2.
The length of the section steel 7 of each side of the precast pier 1 extending into the post-pouring belt groove 4 is equal to the length of the post-pouring belt groove 4, so that the section steel 7 of the two precast piers 1 can be smoothly butted in the range of the post-pouring belt formed by the post-pouring belt grooves 4, and the force transmission uniformity is ensured.
As shown in fig. 1, 2 and 3, a plurality of shear nails 9 can be welded on the surfaces of the section steel 5 and the section steel 7, so that the shear force between the concrete and the steel is effectively transmitted. The shear pins 9 may be uniformly arranged in the appearance of the section steel 5 and the section steel 7.
While the foregoing embodiments have been described in detail with reference to the drawings for the purpose of illustrating the concepts and embodiments of the invention, it will be apparent to those skilled in the art that various modifications and changes can be made therein without departing from the scope of the invention as defined in the appended claims, such as: the form of the post-pouring spout 4, the form of the reinforcement 8, etc., are not described in detail here.
Claims (6)
1. The utility model provides a pier top connection structure for prefabricated pier, includes two prefabricated piers, prefabricated pier includes the stand and is located pier cap at stand top, its characterized in that: the prefabricated pier is assembled along the pier cap, a post-pouring belt groove is reserved on the assembling surface of the pier cap, the depth of the post-pouring belt groove is smaller than the height of the assembling surface of the pier cap, the width of the post-pouring belt groove is smaller than the width of the assembling surface of the pier cap, pre-buried section steel in the pier cap and one end of the section steel stretches into the post-pouring belt groove, and the section steel in the post-pouring belt groove is welded into an integrated structure, and a filler is arranged in the post-pouring belt groove.
2. The pier top connection structure for the prefabricated pier according to claim 1, wherein: and profile steel is pre-embedded at the top of the upright post, and the profile steel is connected with the profile steel in the pier cap through a reinforcing piece.
3. The pier top connecting structure for a prefabricated pier according to claim 1 or 2, wherein: and a plurality of shear nails are fixed on the surface of the section steel.
4. The pier top connection structure for the prefabricated pier according to claim 1, wherein: the filler is micro-expansion concrete.
5. A construction method relating to the pier top connection structure for the prefabricated pier according to any one of claims 1 to 4, comprising the prefabricated pier column and the prefabricated pier cap, characterized in that: splicing along the post-pouring belt grooves, and butt welding the section steel extending into the post-pouring belt grooves; and pouring micro-expansive concrete into the post-pouring belt groove to form a post-pouring belt so as to connect the pier tops of the two precast piers into a whole.
6. The construction method of the pier top connection structure for the prefabricated pier according to claim 5, wherein the construction method comprises the following steps: and fixing a plurality of shear nails on the surface of the section steel in the pier cap and the section steel in the pier column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109256.0A CN109083003B (en) | 2018-09-21 | 2018-09-21 | Pier top connecting structure for prefabricated pier and construction method of pier top connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811109256.0A CN109083003B (en) | 2018-09-21 | 2018-09-21 | Pier top connecting structure for prefabricated pier and construction method of pier top connecting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109083003A CN109083003A (en) | 2018-12-25 |
| CN109083003B true CN109083003B (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811109256.0A Active CN109083003B (en) | 2018-09-21 | 2018-09-21 | Pier top connecting structure for prefabricated pier and construction method of pier top connecting structure |
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| Country | Link |
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| CN (1) | CN109083003B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158484A (en) * | 2019-07-03 | 2019-08-23 | 中铁上海工程局集团有限公司 | A kind of high-speed railway packaged type bridges precast assembly structure and construction method |
| CN113123219A (en) * | 2020-01-10 | 2021-07-16 | 中国国家铁路集团有限公司 | UHPC seam-based prefabricated assembled pier structure and construction method |
| CN113202013A (en) * | 2020-03-14 | 2021-08-03 | 中国铁路设计集团有限公司 | Splicing structure between prefabricated top cap and pier stud and construction method |
| CN113202014B (en) * | 2020-03-14 | 2022-10-14 | 中国铁路设计集团有限公司 | Top cap and pier column steel bar circular seam connection type assembly structure and construction method |
| US11479929B2 (en) | 2020-08-07 | 2022-10-25 | Peri Se | Formwork system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6449791B1 (en) * | 2001-03-19 | 2002-09-17 | Dennis A. Vodicka | Prefabricated pier system |
| CN103215893A (en) * | 2013-04-26 | 2013-07-24 | 上海市城市建设设计研究总院 | Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam |
| CN104404869A (en) * | 2014-11-26 | 2015-03-11 | 天津港航工程有限公司 | Pile column type concrete hollow pile pier structure |
| CN206467561U (en) * | 2017-02-16 | 2017-09-05 | 上海市城市建设设计研究总院（集团）有限公司 | Prefabricated assembled twin columns vase bridge pier |
| CN108301317A (en) * | 2018-04-10 | 2018-07-20 | 大连理工大学 | A kind of assembled bridge pier structure and its construction method |
| CN209099157U (en) * | 2018-09-21 | 2019-07-12 | 上海市隧道工程轨道交通设计研究院 | A kind of precast pier pier top connection structure |
-
2018
- 2018-09-21 CN CN201811109256.0A patent/CN109083003B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6449791B1 (en) * | 2001-03-19 | 2002-09-17 | Dennis A. Vodicka | Prefabricated pier system |
| CN103215893A (en) * | 2013-04-26 | 2013-07-24 | 上海市城市建设设计研究总院 | Method for prefabricated assembly of middle-divided sections of large-sized capping beam and assembly structure of middle-divided sections of large-sized capping beam |
| CN104404869A (en) * | 2014-11-26 | 2015-03-11 | 天津港航工程有限公司 | Pile column type concrete hollow pile pier structure |
| CN206467561U (en) * | 2017-02-16 | 2017-09-05 | 上海市城市建设设计研究总院（集团）有限公司 | Prefabricated assembled twin columns vase bridge pier |
| CN108301317A (en) * | 2018-04-10 | 2018-07-20 | 大连理工大学 | A kind of assembled bridge pier structure and its construction method |
| CN209099157U (en) * | 2018-09-21 | 2019-07-12 | 上海市隧道工程轨道交通设计研究院 | A kind of precast pier pier top connection structure |
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| Publication number | Publication date |
|---|---|
| CN109083003A (en) | 2018-12-25 |
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