CN110725195A - Connecting method for assembly type pier and bearing platform anchoring steel bar sleeve-insertion post-cast RPC and application thereof - Google Patents
Connecting method for assembly type pier and bearing platform anchoring steel bar sleeve-insertion post-cast RPC and application thereof Download PDFInfo
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- CN110725195A CN110725195A CN201911141180.4A CN201911141180A CN110725195A CN 110725195 A CN110725195 A CN 110725195A CN 201911141180 A CN201911141180 A CN 201911141180A CN 110725195 A CN110725195 A CN 110725195A
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- 238000004873 anchoring Methods 0.000 title claims abstract description 83
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 74
- 239000010959 steel Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000003780 insertion Methods 0.000 title description 3
- 239000000843 powder Substances 0.000 claims abstract description 19
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- Engineering & Computer Science (AREA)
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- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
Relates to a connection method of an assembly pier and a cushion cap anchoring reinforcing steel bar sleeve-inserted post-cast RPC, which connects a prefabricated pier stud with a foundation cushion cap and comprises the following steps: (1) embedding anchoring steel bars at the lower ends of the prefabricated pier studs and fixing the anchoring steel bars by using stirrups; arranging a reserved pit slot on the top surface of the foundation bearing platform, embedding an anchoring steel bar at the bottom of the reserved pit slot of the foundation bearing platform and fixing the anchoring steel bar by using a stirrup; (2) hoisting the prefabricated pier stud, aligning the prefabricated pier stud with the reserved pit groove, and sleeving the overhanging connecting section of the anchoring steel bar of the prefabricated pier stud outside the overhanging connecting section of the anchoring steel bar of the foundation bearing platform; (3) and pouring reactive powder concrete into the reserved pit slot, and finishing connection after the reactive powder concrete is solidified to reach the strength. The method is also applied to medium-small-span viaducts and overpasses with single-hole span within 40 m. The invention only needs normal temperature maintenance, has the advantages of simple and convenient construction method, high speed and reliable stress, and belongs to the technical field of building construction.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a connecting method of an assembly type pier and a bearing platform anchoring steel bar sleeve-inserted post-cast RPC and application thereof.
Background
In urban traffic, medium and small-span viaducts and overpasses are most widely applied, and when the bridges are constructed, a certain ground needs to be occupied, so that certain influence, even great influence, is caused on the passing of vehicles and pedestrians.
In the most conventional construction method of the existing bridge, the bridge piers are constructed by cast-in-place concrete, and the concrete is cast and maintained in situ, so that the occupied area is large, the construction period is long, and the influence on traffic is large. The construction method which shortens the construction period as much as possible and occupies small space is needed.
Disclosure of Invention
Aiming at the technical problem that the construction method of the existing small-span viaduct and overpass in the city has great influence on the urban traffic, the invention aims to: the connecting method for the assembly type pier and the bearing platform anchoring steel bar sleeve-inserted post-cast RPC is quick in construction, free of a template and reliable in connection, and the application of the connecting method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a connection method of an assembly type pier and a bearing platform anchoring steel bar sleeve-inserted post-cast RPC connects a prefabricated pier column and a foundation bearing platform, and comprises the following steps: (1) embedding anchoring steel bars at the lower ends of the prefabricated piers and fixing the anchoring steel bars by using stirrups, arranging reserved pit slots on the top surface of the foundation bearing platform, and embedding anchoring steel bars at the bottoms of the reserved pit slots of the foundation bearing platform and fixing the anchoring steel bars by using the stirrups; (2) hoisting the prefabricated pier stud, aligning the prefabricated pier stud with the reserved pit groove, and sleeving the overhanging connecting section of the anchoring steel bar of the prefabricated pier stud outside the overhanging connecting section of the anchoring steel bar of the foundation bearing platform; (3) and pouring reactive powder concrete into the reserved pit slot, and finishing connection after the reactive powder concrete is solidified to reach the strength.
Preferably, the bonding is followed by curing at ambient temperature.
As a preferable mode, the step (1) is specifically: the lower end of the prefabricated pier column is embedded with anchoring steel bars, the anchoring steel bars comprise embedded sections located in the prefabricated pier column concrete and overhanging connecting sections located outside the prefabricated pier column concrete, the anchoring steel bars are arranged into the cross section shape of the prefabricated pier column, and the anchoring steel bars are fixed through stirrups; the foundation bearing platform is provided with a reserved pit groove, anchoring reinforcing steel bars are embedded in the foundation bearing platform and comprise embedded sections located in concrete of the foundation bearing platform and overhanging connecting sections located outside the concrete of the foundation bearing platform and located in the reserved pit groove, the arrangement shape of the anchoring reinforcing steel bars corresponds to that of the prefabricated pier stud, and the anchoring reinforcing steel bars are fixed through stirrups.
Preferably, the cross section of the prefabricated pier stud is circular or rectangular, and the arrangement shape of the anchoring steel bars of the prefabricated pier stud and the foundation bearing platform is the same as that of the cross section of the prefabricated pier stud.
Preferably, the lengths of the embedded section and the overhanging connecting section of the prefabricated pier column anchoring steel bar and the foundation bearing platform anchoring steel bar are equal to the length of the long side of the section of the prefabricated pier column, but the length of the overhanging connecting section is 5-10 cm smaller than the depth of the reserved pit slot; the shape and size of the foundation bearing platform surrounded by the anchoring steel bars is smaller than the shape and size of the prefabricated pier stud surrounded by the anchoring steel bars, and the distance is 8-12 cm.
Preferably, the cross section shape of the reserved pit groove is the same as that of the prefabricated pier stud; the section size of the prefabricated pier column is 10-15 cm smaller than that of the reserved pit groove.
Preferably, in the step (1), in the prefabricated pier column and the foundation bearing platform, the anchoring steel bars are arranged along the vertical direction and arranged in a ring shape along the horizontal direction, the annular stirrups are sequentially arranged along the high and low positions, the intervals between the stirrups are 10-15 cm, and the stirrups are smeared into inclined planes.
Preferably, the anchoring bar and the stirrup are fixed by welding or binding.
Preferably, in the step (3), the poured reactive powder concrete is 5-10 cm higher than the top surface of the foundation bearing platform.
An application of a connecting method of an assembly pier and a bearing platform anchoring steel bar sleeving and inserting post-pouring RPC is applied to medium-small span viaducts and overpasses with single-hole span within 40 m.
In summary, the present invention has the following advantages:
1. the structure is simple, the construction is convenient, the maintenance at normal temperature is only needed, the construction period can be shortened, the occupied area is reduced, and the influence on urban traffic is reduced.
2. The rapid construction of the connection between the assembled pier and the bearing platform foundation of the urban small and medium-span bridge is realized.
3. The joint reinforcing steel bar has simple structure, the RPC poured later has high strength and reliable stress.
4. The reactive powder concrete has the characteristics of high strength, corrosion resistance and good durability, does not need steam curing, can be cured at normal temperature for 24 hours, has the compressive strength of over 65MPa and the flexural strength of over 10MPa, and can be used for other assembling work of the bridge pier. The joints have strong tensile capacity and stress reliability through the connection of the active powder concrete, and the rapid splicing of the bridge substructure is realized.
Drawings
Fig. 1 is a schematic diagram of a connection method of an assembly type pier and a bearing platform anchoring steel bar sleeve-inserted post-cast RPC.
Fig. 2 is a sectional view of the rectangular pier stud connection structure of the first embodiment in the direction of a-a.
Fig. 3 is a sectional view of the round pier stud connection structure of the second embodiment in the direction of a-a.
Figure 4 is a schematic view of the structural sub-sections before assembly.
Wherein, 1 is prefabricated pier stud, 2 is the ground cushion cap, 3 is the anchor reinforcing bar of prefabricated pier stud, 4 is the stirrup of prefabricated pier stud, 5 is the reservation pit slot, 6 is the anchor reinforcing bar of ground cushion cap, 7 is the stirrup of ground cushion cap, 8 is reactive powder concrete.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example one
A connection method of an assembly type pier and a bearing platform anchoring steel bar sleeve-inserted post-cast RPC (reactive powder concrete), specifically comprises the following steps:
(1) the lower end of the prefabricated pier column is embedded with anchoring steel bars along the periphery of the cross section, the length of the embedded section and the extended connecting section of each anchoring steel bar is approximately equal to the length of the long edge or the diameter of the cross section of the prefabricated pier column, and the anchoring steel bars are welded or bound and fixed by stirrups with the distance of about 15 cm.
(2) And arranging a reserved pit slot on the top surface of the foundation bearing platform, wherein the depth of the reserved pit slot is 5-10 cm greater than the extending connection length of the anchoring steel bar embedded in the prefabricated pier stud, the planar shape of the reserved pit slot is the same as the cross section shape of the prefabricated pier stud, but the periphery of the planar size is about 10-15 cm greater than the cross section size of the prefabricated pier stud so as to facilitate the insertion of the lower end of the prefabricated pier stud.
(3) The bottom of a reserved pit groove of the foundation bearing platform is also pre-embedded with anchoring steel bars, the arrangement plane shape of the anchoring steel bars is consistent with that of the prefabricated pier stud and staggered with each other, the peripheral size of the anchoring steel bars is smaller than that of the prefabricated pier stud, the length of the overhanging connecting section of the anchoring steel bars is consistent with the extending connecting length of the anchoring steel bars pre-embedded in the prefabricated pier stud, and the overhanging connecting section of the anchoring steel bars is welded or bound and fixed by stirrups with the distance of about 15 cm.
(4) And (4) hoisting prefabricated assembly parts at the lower ends of the pier columns, wherein the overhanging connecting sections of the anchoring steel bars of the prefabricated pier columns stretch downwards into the reserved pit slots of the foundation bearing platform, and the overhanging connecting sections of the anchoring steel bars of the foundation bearing platform are sleeved into the prefabricated assembly parts.
(5) And after the prefabricated pier stud is accurately positioned, pouring reactive powder concrete until the reactive powder concrete is 5-10 cm higher than the top surface of the foundation bearing platform, and finishing connection after the reactive powder concrete is solidified to reach strength.
After the connection method is maintained for 24 hours at normal temperature, the RPC strength of the connection part can reach more than 65 MPa.
In the embodiment, the section of the prefabricated pier stud is rectangular, the section of the reserved pit groove is also rectangular, and the periphery of the reserved pit groove is 10 cm larger than the section of the reserved pit groove; the anchoring steel bars of the prefabricated pier stud are arranged in a rectangular ring shape, and are 7 cm away from the edge of the section of the concrete; the anchoring steel bars of the foundation bearing platform are also arranged into a rectangular ring shape, but the size of the rectangular ring is smaller than that of a rectangular ring formed by the anchoring steel bars of the prefabricated pier stud, and the distance between the two rectangular rings is 10-15 cm; the length of the embedded section and the overhanging connecting section of the anchoring steel bar of the prefabricated pier stud and the length of the connecting section of the anchoring steel bar of the foundation bearing platform are equal to the length of the long side of the cross section of the prefabricated pier stud, but the length of the overhanging connecting section is 5-10 cm smaller than the depth of the reserved pit groove.
The anchoring reinforcing steel bar of the prefabricated pier stud comprises an embedded section and an outward extending connecting section, wherein the embedded section is located in the prefabricated pier stud concrete, and the outward extending connecting section is located outside the prefabricated pier stud concrete and is fixed through stirrups.
The foundation cushion cap is equipped with and reserves the hole groove, and the pre-buried anchor reinforcing bar in the foundation cushion cap is including the embedded section that is located foundation cushion cap concrete, still including being located the foundation cushion cap outside and being located the overhanging linkage segment that reserves the hole groove, all fixed through the stirrup.
During the assembly, the overhanging linkage segment of the anchor reinforcing bar of prefabricated pier stud overlaps outside the overhanging linkage segment of the anchor reinforcing bar of ground cushion cap, in order to reserve the splice space, construction convenience, and both are apart from about 10 centimetres. In prefabricated pier stud and ground cushion cap, the anchor reinforcing bar sets up along vertical direction, arranges the circularity along the horizontal direction, and is fixed by the welding of confined stirrup or ligature, the stirrup interval 10 ~ 15 centimetres.
And pouring reactive powder concrete in the reserved pit slot. The height of the poured reactive powder concrete is 5-10 cm higher than the top surface of the foundation bearing platform. The Reactive Powder Concrete (Reactive Powder Concrete) has the characteristics of short domestic service time, high strength, corrosion resistance and good durability, does not need steam curing, is cured at normal temperature for 24 hours, and has the compressive strength of over 65MPa and the flexural strength of over 10 MPa.
The invention connects all the steel bars into a whole by sleeving the anchoring steel bars and pouring RPC, has the characteristics of reliable stress, convenient construction, high speed and only need of normal-temperature maintenance, does not influence the appearance of the bottom of the pier column of the bridge, and hardly influences the use of the ground around the pier column.
The invention is applied to the medium-small span viaduct with single-hole span within 40 m.
Example two
In this embodiment, the cross-sectional shape of the prefabricated pier stud is circular, and the cross-sectional shape of the reserved pit groove is also circular. The rectangle involved in the first embodiment is only changed into a circle, and the rest parts are completely the same.
The invention is applied to the medium and small-span overpasses within the range of 40m of single-hole span.
The prefabricated pier may be a concrete prefabricated assembled pier of any sectional shape except the above-mentioned manner of the embodiment; the anchoring bar may be in the form of a ring other than a rectangular ring or a circular ring. These variations are all within the scope of the present invention.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a connection method of assembled pier and cushion cap anchor reinforcing bar socketed post-cast RPC, will prefabricate pier stud and ground cushion cap and connect its characterized in that: the method comprises the following steps:
(1) embedding anchoring steel bars at the lower ends of the prefabricated pier studs and fixing the anchoring steel bars by using stirrups; arranging a reserved pit slot on the top surface of a foundation bearing platform, embedding an anchoring steel bar at the bottom of the reserved pit slot of the foundation bearing platform and fixing the anchoring steel bar by using a stirrup;
(2) hoisting the prefabricated pier stud, aligning the prefabricated pier stud with the reserved pit groove, and sleeving the overhanging connecting section of the anchoring steel bar of the prefabricated pier stud outside the overhanging connecting section of the anchoring steel bar of the foundation bearing platform;
(3) and pouring reactive powder concrete into the reserved pit slot, and finishing connection after the reactive powder concrete is solidified to reach the strength.
2. The connection method of the assembly type pier and the bearing platform anchoring steel bar sleeve-inserted post-cast RPC according to claim 1, which is characterized in that: and curing at normal temperature after connection.
3. The connection method of the assembly type pier and the bearing platform anchoring steel bar socketed post-cast RPC according to the claim 1 or 2, which is characterized in that: the step (1) is specifically as follows: the lower end of the prefabricated pier column is embedded with anchoring steel bars, the anchoring steel bars comprise embedded sections located in the prefabricated pier column concrete and overhanging connecting sections located outside the prefabricated pier column concrete, the anchoring steel bars are arranged into the cross section shape of the prefabricated pier column, and the anchoring steel bars are fixed through stirrups; the foundation bearing platform is provided with a reserved pit groove, anchoring reinforcing steel bars are embedded in the foundation bearing platform and comprise embedded sections located in concrete of the foundation bearing platform and overhanging connecting sections located outside the concrete of the foundation bearing platform and located in the reserved pit groove, the arrangement shape of the anchoring reinforcing steel bars corresponds to that of the prefabricated pier stud, and the anchoring reinforcing steel bars are fixed through stirrups.
4. The connection method of the assembly type pier and the bearing platform anchoring steel bar sleeve-inserted post-cast RPC according to claim 3, which is characterized in that: the cross section of the prefabricated pier stud is circular or rectangular, and the arrangement shape of the anchoring steel bars of the prefabricated pier stud and the foundation bearing platform is the same as that of the cross section of the prefabricated pier stud.
5. The connection method of the assembly type pier and the bearing platform anchoring steel bar sleeve-inserted post-cast RPC according to claim 4, which is characterized in that: the length of the embedded section and the length of the overhanging connecting section of the anchoring steel bar of the prefabricated pier column and the anchoring steel bar of the foundation bearing platform are equal to the length of the long side of the section of the prefabricated pier column, but the length of the overhanging connecting section is 5-10 cm smaller than the depth of the reserved pit slot; the shape and size of the foundation bearing platform surrounded by the anchoring steel bars is smaller than the shape and size of the prefabricated pier stud surrounded by the anchoring steel bars, and the distance is 8-12 cm.
6. The connection method of the assembly type pier and the bearing platform anchoring steel bar sleeve-inserted post-cast RPC according to claim 3, which is characterized in that: the shape of the cross section of the reserved pit groove is the same as that of the cross section of the prefabricated pier stud; the section size of the prefabricated pier column is 10-15 cm smaller than that of the reserved pit groove.
7. The connection method of the assembly type pier and the bearing platform anchoring steel bar socketed post-cast RPC according to the claim 1 or 2, which is characterized in that: in the step (1), in the prefabricated pier column and the foundation bearing platform, the anchoring steel bars are arranged along the vertical direction and arranged into a ring along the horizontal direction, the annular stirrups are sequentially arranged along the high and low positions, and the interval between the stirrups is 10-15 cm.
8. The connection method of the assembly type pier and the bearing platform anchoring steel bar sleeve-inserted post-cast RPC according to claim 8, characterized in that: the anchoring steel bars and the stirrups are fixed by welding or binding.
9. The connection method of the assembly type pier and the bearing platform anchoring steel bar socketed post-cast RPC according to the claim 1 or 2, which is characterized in that: in the step (3), the poured reactive powder concrete is 5-10 cm higher than the top surface of the foundation bearing platform and is smeared into an inclined plane.
10. The utility model provides an application of assembled pier and cushion cap anchor reinforcing bar socketed post-cast RPC's connection method which characterized in that: the method is applied to medium-small span viaducts and overpasses with single-hole span within 40 m.
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| CN201911141180.4A CN110725195A (en) | 2019-11-20 | 2019-11-20 | Connecting method for assembly type pier and bearing platform anchoring steel bar sleeve-insertion post-cast RPC and application thereof |
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| CN201911141180.4A CN110725195A (en) | 2019-11-20 | 2019-11-20 | Connecting method for assembly type pier and bearing platform anchoring steel bar sleeve-insertion post-cast RPC and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648245A (en) * | 2020-05-21 | 2020-09-11 | 中交二公局第二工程有限公司 | Ultra-large area grouting construction method for cable-stayed bridge reinforced concrete combined section |
| CN113215968A (en) * | 2021-06-01 | 2021-08-06 | 深圳市市政设计研究院有限公司 | Connecting structure of bearing platform and prefabricated pier stud with adjustable wet joint form and construction method |
| CN113235401A (en) * | 2021-06-10 | 2021-08-10 | 深圳市城市交通规划设计研究中心股份有限公司 | Prefabricated pier column and bearing platform connecting structure capable of adjusting wet joint mode and construction method |
| CN113914352A (en) * | 2021-08-30 | 2022-01-11 | 山东电力工程咨询院有限公司 | Wind driven generator assembly integral type foundation structure and preparation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648245A (en) * | 2020-05-21 | 2020-09-11 | 中交二公局第二工程有限公司 | Ultra-large area grouting construction method for cable-stayed bridge reinforced concrete combined section |
| CN113215968A (en) * | 2021-06-01 | 2021-08-06 | 深圳市市政设计研究院有限公司 | Connecting structure of bearing platform and prefabricated pier stud with adjustable wet joint form and construction method |
| CN113235401A (en) * | 2021-06-10 | 2021-08-10 | 深圳市城市交通规划设计研究中心股份有限公司 | Prefabricated pier column and bearing platform connecting structure capable of adjusting wet joint mode and construction method |
| CN113914352A (en) * | 2021-08-30 | 2022-01-11 | 山东电力工程咨询院有限公司 | Wind driven generator assembly integral type foundation structure and preparation method |
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