CN111335154A - Bridge pier column with prefabricated and assembled segments and construction method thereof - Google Patents
Bridge pier column with prefabricated and assembled segments and construction method thereof Download PDFInfo
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- CN111335154A CN111335154A CN202010296549.5A CN202010296549A CN111335154A CN 111335154 A CN111335154 A CN 111335154A CN 202010296549 A CN202010296549 A CN 202010296549A CN 111335154 A CN111335154 A CN 111335154A
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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
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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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Abstract
The invention discloses a bridge pier stud with prefabricated and assembled sections, which comprises a bearing platform, a pier stud body and a bent cap connecting section, wherein the bearing platform, the pier stud body and the bent cap connecting section are arranged from bottom to top; the lower part of each pier column segment is provided with a convex frustum pyramid, the upper part of each pier column segment is provided with a frustum pyramid groove, the shapes and the sizes of the frustum pyramid and the frustum pyramid are mutually nested in a clearance mode, vertical steel bars are pre-embedded in the pier column segments and protrude upwards, and the lower ends of the vertical steel bars are connected with grouting sleeves; the upper part of the bearing platform is an annular bulge, vertical steel bars are pre-embedded and protrude upwards, and a prismatic table groove is formed in the annular bulge on the upper part of the bearing platform; the lower part of the bent cap connecting section is a convex prismatic table, vertical steel bars are pre-embedded, a grouting sleeve is arranged at the bottom of each vertical steel bar and connected with the vertical steel bar, and the convex prismatic table at the lower part of the bent cap connecting section is nested with a prismatic table groove at the upper part of the pier stud section in a clearance mode. The bridge pier stud is better in stress and more stable in structure. The invention also discloses a construction method of the bridge pier stud, which is convenient and efficient to construct.
Description
Technical Field
The invention relates to the technical field of construction of assembled bridges, in particular to a bridge pier column prefabricated and assembled by sections and a construction method thereof.
Background
In the modern reinforced concrete bridge construction, pier columns and capping beams are prefabricated in a factory in a segmented manner in a prefabrication stage and transported to the site for assembly, and the construction technology has the advantages of convenience in transportation, guaranteed component quality, great reduction in site construction operation, high construction speed, short construction period, environmental friendliness and the like, and can be gradually developed into the mainstream direction of the municipal traffic engineering and railway engineering construction technology in the future;
in the bridge structure, the pier stud is an important lateral force resistant component, and the manufacturing quality of the pier stud directly influences the seismic performance of the whole bridge; in the existing prefabricated segment field assembling technology, the field assembling of the pier stud mainly has two modes of a dry joint and a wet joint, the two assembling modes have the problem that concrete pouring between the pier stud and a bearing platform and between pier stud segments is discontinuous, the integrity of the pier stud is insufficient, and the anti-seismic performance of the pier stud is influenced, so that the bridge pier stud for segment prefabrication assembling, which can ensure that the concrete pouring between the pier stud and the bearing platform and between the pier stud segments cannot influence the anti-seismic performance of the pier stud, is urgently needed in the industry.
Disclosure of Invention
The invention aims to: the utility model provides a can guarantee that concrete placement can not lead to the fact the influence to holistic shock resistance between pier stud body and cushion cap, pier stud subsection, the atress is better, and the structure is more stable, and the bridge pier stud of assembling is prefabricated to the more convenient section of construction.
The technical scheme of the invention is as follows: the utility model provides a bridge pier stud that section prefabrication was assembled, includes cushion cap, pier stud body and bent cap coupling segment that sets up from bottom to top, its characterized in that: the pier column body is prefabricated and assembled in a sectional mode and comprises a plurality of same pier column sections; the lower part of the pier column section is a convex prismatic table, the upper part of the pier column section is an annular bulge, a prismatic table groove is arranged in the annular bulge, the shapes and the sizes of the prismatic table and the prismatic table groove are mutually nested in a clearance mode, vertical steel bars are pre-embedded in the annular bulge of the pier column section and protrude upwards, and grouting sleeves are arranged at the lower ends of the vertical steel bars and connected with the lower end of the vertical steel bars and exposed out of the lower part of the pier column section; the upper part of the bearing platform is an annular bulge, vertical steel bars are pre-embedded and protrude upwards, and a prismatic table groove nested with a prismatic table gap protruding from the lower part of the pier column section is formed in the annular bulge on the upper part of the bearing platform; the lower portion of the bent cap connecting section is a convex prismatic table, vertical steel bars are pre-embedded in the convex prismatic table, a grouting sleeve is arranged at the bottom of each vertical steel bar and connected with the vertical steel bar, and the convex prismatic table at the lower portion of the bent cap connecting section is nested with a prismatic table groove at the upper portion of the pier stud section in a clearance mode.
Furthermore, the bent cap connecting section and the pier column section of the pier column body are prefabricated.
Preferably, the surfaces of the bent cap connecting sections and the pier stud sections are roughened by a water flushing method after the bent cap connecting sections and the pier stud sections are prefabricated and have equal strength.
Of course, more preferably, the bearing platform and the annular raised frustum groove positioned at the upper part of the bearing platform are cast in situ in a whole.
Furthermore, each terrace with edge and each terrace with edge recess are the clearance nestification, and during the actual implementation, the volume of terrace with edge slightly is less than the volume of terrace with edge recess to pour into the mortar into.
Furthermore, the vertical steel bars and the grouting sleeves of the pier column sections vertically penetrate through the pier column sections, the upper parts of the vertical steel bars protrude out of the pier column sections, the lower parts of the vertical steel bars are connected with the grouting sleeves, and the lower openings of the grouting sleeves are exposed out of the bottoms of the pier column sections.
The invention also aims to provide the construction method of the bridge pier stud prefabricated and assembled by the segments, which is characterized by comprising the following steps of:
prefabricating a bent cap connecting section and a pier column section forming a pier column body, and roughening the surfaces of the bent cap connecting section and the pier column section after the bent cap connecting section and the pier column section are subjected to equal strength;
step two, integrally pouring a bearing platform and an annular bulge positioned at the upper part of the bearing platform on a construction site according to design requirements, and roughening the surface of the bearing platform after the bearing platform and the annular bulge are subjected to equal strength;
injecting mortar into the prismatic table groove at the upper part of the bearing platform according to design requirements;
fourthly, hoisting the first pier stud segment, inserting the vertical steel bars which are pre-embedded on the bearing platform and protrude upwards into the grouting sleeve at the lower part of the first pier stud segment, and pressing the prismatic table of the pier stud segment into the prismatic table groove of the bearing platform and compressing the prismatic table groove;
fifthly, grouting in the grouting sleeve, cleaning mortar overflowing from the bearing platform and the first pier stud segment, and scraping the joint surface of the mortar;
sixthly, repeating the third step to the fifth step, and hoisting each pier stud segment section by section;
seventhly, after the hoisting of the last pier stud segment is finished, hoisting the bent cap connecting segment: and injecting mortar into the terrace groove of the last pier stud segment according to design requirements, then hoisting the bent cap connecting segment, inserting the vertical steel bar which is upwards protruded from the last pier stud segment into the grouting sleeve of the bent cap connecting segment, and pressing the terrace of the bent cap connecting segment into the terrace groove of the last pier stud segment and compressing the terrace.
The invention has the advantages that:
1. in the pier column body, the cross sections of the joints of the pier column sections from top to bottom are almost equal in area, so that the cross section characteristics are approximately the same, and the mechanical structure is more stable.
2. The pier column sections, the bent cap connecting sections and the bearing platforms are connected in a mutually clearance nested mode through the convex prismatic platforms and the prismatic platform grooves, bonding surfaces among all prefabricated sections and between the prefabricated sections and the bearing platforms are greatly increased, and the advantages are combined, so that the bridge pier column has good integrity, better stress and more stable structure. And can guarantee that concrete placement can not cause the influence to the holistic shock resistance of bridge pier stud between pier stud body and cushion cap, pier stud subsection to whole shock resistance that obtains the preferred.
3. The adopted terrace with edge and terrace groove gap matching connection structure in the invention ensures that all the joints have very good stress performance.
4. The invention adopts the mode of integrally casting the bearing platform in situ, and ensures that good stress performance is ensured between the bearing platform and the prismatic table groove of the annular bulge on the bearing platform.
5. The construction method of the bridge pier column prefabricated and assembled by the segments provided by the invention is convenient to operate and high in construction efficiency, and the bridge pier column constructed by the construction method is better in anti-seismic performance and stress and more stable in structure.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is an overall schematic view of the assembled version of the present invention;
fig. 2 is a front elevation view of a pier stud segment of the present invention;
FIG. 3 is a front view of the platform of the present invention;
fig. 4 is a top view of a pier stud segment of the present invention;
fig. 5 is a bottom view of a pier stud segment of the present invention;
FIG. 6 is an elevation view of a section of the lid beam attachment of the present invention;
fig. 7 is a bottom view of the capping beam attachment section of the present invention.
Wherein: 1. the capping beam connecting segment; 2. a pier stud segment; 3. an annular projection; 4. a bearing platform; 5. vertical reinforcing steel bars; 6. grouting a casing pipe; 7. a prismatic table; 8. a prismatic table groove.
Detailed Description
Example (b): the following description will be made of a specific embodiment of a bridge pier stud prefabricated and assembled by segments according to the present invention with reference to fig. 1 to 7 as follows:
a bridge pier column with prefabricated and assembled sections comprises a bearing platform 4, a pier column body and a bent cap connecting section 1 which are arranged from bottom to top, wherein the pier column body is prefabricated and assembled in a sectional mode and is formed by splicing a plurality of identical pier column sections 2; the lower part of the pier column section 2 is provided with a convex frustum pyramid 7, the upper part of the pier column section 2 is provided with an annular bulge 3, the annular bulge 3 is internally provided with a frustum pyramid groove 8, the frustum pyramid groove 8 and the frustum pyramid 7 are nested in a mutually clearance manner in shape and size, the annular bulge of the pier column section 2 is pre-embedded with vertical steel bars 5 and protrudes upwards, and the lower ends of the vertical steel bars 5 are all provided with grouting sleeves 6 which are connected with the vertical steel bars and are exposed out of the lower part of the pier column section 2; the upper part of the bearing platform 4 is provided with an annular bulge 3, vertical steel bars 5 are pre-embedded and protrude upwards, and a prismatic table groove 8 which is nested with a prismatic table 7 protruding from the lower part of the pier column section 2 in a clearance mode is arranged in the annular bulge 3 at the upper part of the bearing platform 4; the lower portion of the bent cap connecting section 1 is a convex prismatic table 7, vertical steel bars 5 are pre-embedded, grouting sleeves 6 are arranged at the bottoms of the vertical steel bars 5 to be connected with the vertical steel bars, and the convex prismatic table 7 at the lower portion of the bent cap connecting section 1 and the prismatic table groove 8 at the upper portion of the pier stud section 2 are nested in a clearance mode.
In this embodiment, the cap beam connecting section 1 and the pier stud section 2 of the pier stud body are both prefabricated.
In this embodiment, the surface of the capping beam connecting section 1 and the surface of the pier stud section 2 are roughened by a water flushing method after the capping beam connecting section 1 and the pier stud section 2 are prefabricated and have equal strength.
Referring to fig. 3, the bearing platform 4 and the frustum groove 8 of the annular protrusion 3 on the bearing platform 4 are cast in place as a whole, so as to ensure that the connection point between the bearing platform and the frustum groove is integral and enhance the stress performance of the bearing platform.
As shown in fig. 1, 2, 3, and 6, each of the frustum pyramid 7 and the frustum pyramid groove 8 in each of the annular protrusions 3 are in a clearance nesting for injecting mortar, that is, the frustum pyramid 7 has a shape and a volume slightly smaller than the frustum pyramid groove 8, so that the mortar can fill the contact surface of the frustum pyramid after the mortar is injected.
As shown in fig. 1, fig. 3, fig. 4, fig. 5, and fig. 7, the vertical steel bars 5 and the grouting sleeves 6 of the pier stud segments 2 vertically penetrate through the pier stud segments, the pier stud segments 2 protrude from the upper portions of the vertical steel bars 5, the lower portions of the vertical steel bars are connected with the grouting sleeves 6, and the lower openings of the grouting sleeves 6 expose the bottoms of the pier stud segments 2.
The invention also provides a construction method of the bridge pier stud with the prefabricated and assembled sections, which comprises the following steps:
step one, prefabricating a bent cap connecting section 1 and a pier column section 2 forming a pier column body, and after the strength is equal, carrying out water flushing roughening treatment on the surfaces of the bent cap connecting section 1 and the pier column section 2;
step two, integrally pouring a bearing platform 4 and an annular bulge 3 positioned at the upper part of the bearing platform 4 according to design requirements on a construction site, and after the strength is equal, carrying out water flushing roughening treatment on the surface of the bearing platform 4;
injecting mortar into the frustum groove 8 at the upper part of the bearing platform according to design requirements, wherein the amount of the injected mortar is according to the contact surface of the frustum groove 8 and the frustum 7 in the process of protruding nesting and the design requirements required for bonding;
fourthly, hoisting the first pier stud section 2, inserting the vertical reinforcing steel bars 5 which are pre-embedded on the bearing platform 4 and protrude upwards into the grouting sleeve 6 at the lower part of the first pier stud section 1, and pressing the prismatic table 7 of the pier stud section 2 into the prismatic table groove 8 at the upper part of the bearing platform 4 and tightly pressing;
fifthly, grouting is carried out in the grouting sleeve 6, mortar overflowing from the bearing platform 4 and the first pier stud segment 2 is cleaned, and the joint surface of the mortar is scraped;
sixthly, repeating the third step to the fifth step, and hoisting each pier stud segment 2 segment by segment;
seventhly, after the hoisting of the last pier stud segment is finished, hoisting the bent cap connecting segment 1: mortar is injected into the prismatic table groove 8 of the last pier stud section 2 according to design requirements, then the bent cap connecting section 1 is lifted, the vertical steel bars 5 which are upward emerged from the last pier stud section 2 are inserted into the grouting sleeve 6 of the bent cap connecting section 1, and meanwhile, the prismatic table 7 of the bent cap connecting section 1 is pressed into the prismatic table groove 8 of the last pier stud section 2 and is compressed.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (7)
1. The utility model provides a bridge pier stud that section prefabrication was assembled, includes cushion cap (4), pier stud body and bent cap coupling segment (1) that set up from bottom to top, its characterized in that: the pier column body is prefabricated and assembled in a sectional mode and comprises a plurality of same pier column sections (2); the lower part of the pier column section (2) is provided with a convex frustum pyramid (7), the upper part of the pier column section is provided with an annular bulge (3), a frustum pyramid groove (8) is formed in the annular bulge (3) and is nested with the frustum pyramid (7) in a shape and size mutually in a clearance mode, the annular bulge (3) of the pier column section (2) is pre-embedded with vertical steel bars (5) and protrudes upwards, and the lower ends of the vertical steel bars (5) are respectively provided with grouting sleeves (6) which are connected with the vertical steel bars and exposed out of the lower part of the pier column section (2); the upper part of the bearing platform (4) is provided with an annular bulge (3), vertical steel bars (5) are pre-embedded and protrude upwards, and a prismatic table groove (8) which is nested with a prismatic table (7) protruding from the lower part of the pier column section (2) in a clearance mode is formed in the annular bulge (3) at the upper part of the bearing platform; the lower portion of the bent cap connecting section (1) is a convex prismatic table (7), vertical steel bars (5) are pre-embedded, a grouting sleeve (6) is arranged at the bottom of each vertical steel bar (5) to be connected with the vertical steel bars, and the convex prismatic table (7) at the lower portion of the bent cap connecting section (1) and the prismatic table groove (8) at the upper portion of the pier column section (2) are nested in a clearance mode.
2. The bridge pier stud assembled by prefabricating sections according to claim 1, wherein the capping beam connecting section (1) and the pier stud section (2) of the pier stud body are both prefabricated.
3. The bridge pier stud assembled by prefabricating sections according to claim 2, wherein the capping beam connecting sections (1) and the pier stud sections (2) are prefabricated and strengthened and then the surfaces of the capping beam connecting sections and the pier stud sections are roughened by a water flushing method.
4. The bridge pier column prefabricated and assembled by sections according to claim 1, wherein the bearing platform (4) and the frustum groove (8) of the annular protrusion (3) positioned at the upper part of the bearing platform (4) are cast in situ as a whole.
5. The bridge pier column prefabricated and assembled by sections according to claim 1, wherein gaps for injecting mortar are nested between the frustum pyramid (7) and the frustum pyramid grooves (8).
6. The bridge pier column with prefabricated and assembled segments according to claim 1, wherein vertical steel bars (5) and grouting sleeves (5) of the pier column segments (2) vertically penetrate through the bridge pier column, the upper portions of the vertical steel bars (5) protrude out of the pier column segments (2), the lower portions of the vertical steel bars are connected with the grouting sleeves (6), and the lower openings of the grouting sleeves (6) are exposed out of the bottoms of the pier column segments (2).
7. The construction method of the segmental prefabricated assembled bridge pier column as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
step one, prefabricating a bent cap connecting section (1) and a pier column section (2) forming a pier column body, and roughening the surfaces of the bent cap connecting section and the pier column section after the strength is equal;
step two, integrally pouring a bearing platform (4) and an annular bulge (3) positioned at the upper part of the bearing platform (4) according to design requirements on a construction site, and roughening the surface of the bearing platform after the strength is equal;
injecting mortar into the prismatic table groove (8) at the upper part of the bearing platform (4) according to design requirements;
fourthly, hoisting the first pier stud section (2), inserting the vertical reinforcing steel bars (5) which are pre-buried on the bearing platform (4) and protrude upwards into a grouting sleeve (6) at the lower part of the first pier stud section (2), and pressing the prismatic platforms (7) of the pier stud section (2) into the prismatic platform grooves (8) of the bearing platform (4) and compressing the prismatic platforms;
fifthly, grouting in the grouting sleeve (6), cleaning mortar overflowing from the space between the bearing platform (4) and the first pier stud segment (2), and scraping the joint surface of the mortar;
sixthly, repeating the third step to the fifth step, and hoisting each pier stud segment (2) section by section;
seventhly, after the last pier stud segment (2) is hoisted, hoisting the bent cap connecting segment (1): mortar is injected into the prismatic table groove (8) of the last pier stud segment (2) according to design requirements, then the bent cap connecting segment (1) is lifted, the vertical steel bars (5) which are upwards emerged from the last pier stud segment (2) are inserted into the grouting sleeve (6) of the bent cap connecting segment (1), and meanwhile, the convex prismatic table (7) of the bent cap connecting segment (1) is pressed into the prismatic table groove (8) of the last pier stud segment (2) and is compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010296549.5A CN111335154A (en) | 2020-04-15 | 2020-04-15 | Bridge pier column with prefabricated and assembled segments and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010296549.5A CN111335154A (en) | 2020-04-15 | 2020-04-15 | Bridge pier column with prefabricated and assembled segments and construction method thereof |
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| CN111335154A true CN111335154A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010296549.5A Pending CN111335154A (en) | 2020-04-15 | 2020-04-15 | Bridge pier column with prefabricated and assembled segments and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373798A (en) * | 2021-05-14 | 2021-09-10 | 同济大学 | Prefabricated assembled pier and connecting method thereof |
| CN114134802A (en) * | 2020-09-03 | 2022-03-04 | 南京林业大学 | Slot type connection method for prefabricated bridge pier and bearing platform |
-
2020
- 2020-04-15 CN CN202010296549.5A patent/CN111335154A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114134802A (en) * | 2020-09-03 | 2022-03-04 | 南京林业大学 | Slot type connection method for prefabricated bridge pier and bearing platform |
| CN113373798A (en) * | 2021-05-14 | 2021-09-10 | 同济大学 | Prefabricated assembled pier and connecting method thereof |
| CN113373798B (en) * | 2021-05-14 | 2022-09-20 | 同济大学 | Prefabricated assembled pier and connecting method thereof |
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