CN110205919B - Prefabricated high-strength concrete combined pier structure and construction method thereof - Google Patents
Prefabricated high-strength concrete combined pier structure and construction method thereof Download PDFInfo
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- CN110205919B CN110205919B CN201910506171.4A CN201910506171A CN110205919B CN 110205919 B CN110205919 B CN 110205919B CN 201910506171 A CN201910506171 A CN 201910506171A CN 110205919 B CN110205919 B CN 110205919B
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- 238000010276 construction Methods 0.000 title claims abstract description 51
- 239000011372 high-strength concrete Substances 0.000 title claims abstract description 26
- 239000004567 concrete Substances 0.000 claims abstract description 88
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 80
- 239000010959 steel Substances 0.000 claims description 80
- 230000002787 reinforcement Effects 0.000 claims description 51
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 125000006850 spacer group Chemical group 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 210000003205 muscle Anatomy 0.000 claims description 8
- 230000001012 protector Effects 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 238000009411 base construction Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 239000011178 precast concrete Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000012946 outsourcing Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 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
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a prefabricated high-strength concrete combined pier structure and a construction method thereof. The pier structure comprises a concrete pile, a concrete base and a pier, wherein the concrete pile is arranged below the concrete base, the pier comprises at least one pier unit, the pier unit comprises an inner pier, an outer pier, an inner pier protecting foot and an outer pier protecting foot, the inner pier is of an integral through-length hollow structure, the outer pier is of an integral through-length hollow structure or an assembled hollow structure, at least one boss is arranged on the upper portion of the concrete base, and a partition ring belt is arranged between the inner pier and the outer pier. The combined pier structure has the advantages of convenient production, hoisting and transportation, simple and convenient construction process, shortened construction period in a field assembly mode, and reduced field manpower and construction cost; the combined pier structure can be cast separately, the strength grades of concrete during the cast separately can be different, and the construction cost can be reduced under the condition of ensuring the installation quality of piers.
Description
Technical Field
The invention relates to the technical field of building bridges, in particular to improvement of bridge pier shape and structure and a bridge pier construction method thereof. In particular to a prefabricated high-strength concrete combined pier structure and a construction method thereof.
Background
In many of the overhead piers on roads and municipal roads, concrete is poured after site formwork is supported. The concrete bridge pier cast in situ is greatly influenced by the field environment, and the construction period of the bridge pier of the urban area cannot be ensured due to the on-site formwork supporting and removing, and the surrounding environment is also influenced to a certain extent. When the pier is in a hollow section, a double-mode structural form is adopted, the die is complex to install, the construction period is long, the concrete bridge pier construction process has the problems of complex manufacture of reinforcement cages, lower compressive strength of pile body concrete and the like, excessive materials such as concrete and steel are consumed during casting manufacture, national resources are wasted, and the quality is not guaranteed.
The bridge pier of partial engineering is prefabricated from cast-in-situ to factory, but in the manufacturing process of the prefabricated bridge pier, the degree of mechanization is not high, and especially in the manufacturing of a reinforcement cage, the operation is still carried out by means of manual binding, so that the working efficiency is influenced, the reinforcement cage has poor firmness due to human factors, the main reinforcement is easy to slide, the main reinforcement is easy to misplace in the forming process of the prefabricated bridge pier, and even serious quality problems such as exposure of the main reinforcement occur. When the diameter of the pier is larger or the pier is thicker, the quality of the single pier is overweight, and the influence on manufacturing, transportation and hoisting efficiency is larger.
Disclosure of Invention
In order to overcome the problems, the invention provides the precast concrete combined pier structure which has the advantages of excellent topological form, good mechanical property, high concrete strength grade, simple and convenient production process, convenient hoisting and transportation, convenient site construction and economy and high efficiency, so as to solve the problems of the concrete pier cast in situ and the precast pier.
The invention further aims to provide a construction method for the prefabricated high-strength concrete combined pier, which has the advantages of excellent mechanical property, high concrete strength grade, convenient manufacture in factories, convenient hoisting and transportation, simple and convenient construction process, economy and high efficiency.
In order to solve the technical problems, the invention is realized in the following way:
The invention provides a prefabricated high-strength concrete combined pier structure which comprises a concrete pile, a concrete base and a pier, wherein the concrete pile is arranged below the concrete base, the pier comprises at least one pier unit, the pier unit comprises an inner pier, an outer pier, inner pier protecting feet and outer pier protecting feet, the inner pier is of an integral through-length hollow structure, the outer pier is of an integral through-length hollow structure or an assembled hollow structure, the ratio of the outer diameter to the outer diameter of the inner pier is 1.2-4.2, the ratio of the thickness of the inner pier to the thickness of the outer pier is 1.5-4.5, at least one boss is arranged on the upper portion of the concrete base, the boss is positioned inside the inner pier, the inner pier protecting feet are arranged between the inner pier and the outer pier, the outer pier protecting feet are arranged outside the outer pier, and a barrier ring belt is arranged above the inner pier protecting feet between the inner pier and the outer pier.
Further, an inner tackifying key is arranged at the upper part of the outer side of the inner pier, and the inner tackifying key is a convex steel or convex-concave concrete thread; and/or the inner side of the outer pier is provided with an outer tackifying key, and the outer tackifying key is an outer convex steel or convex-concave concrete thread.
Further, the outer side of the inner pier comprises an outer side lower part connected with an inner pier guard leg and an outer side upper part not connected with the inner pier guard leg, an outer wrapping steel pipe is arranged at the outer side lower part of the inner pier, reinforcing ribs are arranged at the outer side of the outer wrapping steel pipe, a reinforcement cage is arranged at the inner pier guard leg, the reinforcing ribs are of an outer convex steel structure and are arranged along the circumferential direction of the outer wrapping steel pipe, and after the reinforcing ribs alternately extend into the reinforcement cage, the reinforcing ribs are fixedly connected with the reinforcement cage; the outer side of outer mound includes the outside lower part that links to each other with outer mound rib to and the outside upper portion that does not link to each other with outer mound rib, the outside lower part of outer mound is provided with the outsourcing steel pipe, the outside of outsourcing steel pipe is provided with the strengthening rib, outer mound rib department is equipped with the steel reinforcement cage, the strengthening rib is evagination steel structure, along the circumference arrangement of outsourcing steel pipe, after the strengthening rib crisscross stretching into the steel reinforcement cage, with steel reinforcement cage fixed connection.
Still further, the steel reinforcement cage includes framework of steel reinforcement cage, stirrup, the framework of steel reinforcement cage includes outer framework of steel reinforcement cage and inlayer framework of steel reinforcement cage, the main muscle of outer framework of steel reinforcement cage sets up the inboard at the stirrup, the main muscle of inlayer framework of steel reinforcement cage sets up the outside at the stirrup.
Still further, the pier includes a plurality of pier units, namely the pier includes interior mound, first well mound, second well mound, third well mound … … outer mound, and the downside between the adjacent mound sets up interior mound dado, and the upside between the adjacent mound is provided with the barrier zone.
Still further, the spacer tape is poured with cementitious material, either with discrete material, or with pre-left hollow, or with cementitious material only in a localized height range.
Furthermore, the boss and the foot protection part of the bridge pier are arranged protruding out of the base, or the base is provided with a groove, and the boss and the foot protection part of the bridge pier are arranged in the groove.
Still further, the inside reinforcing bar that all sets up logical length of interior mound and outer mound, reinforcing bar length is greater than or equal to pier shaft length, and when reinforcing bar length was greater than pier shaft length, its upper end was worn out from pier upper portion.
Furthermore, when the outer pier is of an assembled hollow structure, the outer pier is formed by assembling at least two semi-circular arcs, and a connecting device is arranged between the adjacent circular arcs.
The invention also provides a construction method of the prefabricated high-strength concrete combined pier structure, which comprises the following steps:
And (3) constructing a concrete pile: adopting construction equipment to construct the concrete pile;
And (3) constructing a concrete base: connecting the precast concrete base with the concrete pile; when the concrete base is prefabricated, the concrete pile construction steps and the concrete base construction steps can be synchronously performed;
And (3) inner pier construction: manufacturing a reinforcement cage on the outer side of the boss, and after the inner pier is arranged on the outer side of the boss on the base, pouring concrete to form an inner pier angle bead, wherein the strength grade of the concrete of the inner pier angle bead is not lower than C50; the inner pier is manufactured by adopting a prestress tensioning process and a centrifugal forming process in a factory, the strength grade of pier body concrete is larger than C60, and the steel bar tensioning force of the inner pier is 0.65-0.75 times of the standard steel bar tensile strength value;
And (3) outer pier construction: when the outer pier is an integral hollow pier, the outer pier is directly arranged on the outer side of the inner pier guard leg on the base, and when the outer pier is an assembled type, the inner pier guard legs of all assembled rings are abutted, and then the outer pier is assembled into an integral outer pier; the outer pier is manufactured by adopting a prestress tensioning process and a centrifugal forming process in a factory, the strength grade of pier body concrete is larger than C70, and the tensile force of the steel bar is 0.2-0.35 times of the standard tensile strength value of the steel bar;
Outer pier foot protection construction: foot protection construction is carried out on the bottom of the outer pier, and the strength grade of the outer pier concrete is not lower than C50;
And (3) construction of a spacer ring belt: pouring concrete into the spacer ring between the inner pier and the outer pier, wherein the strength grade of the concrete is not lower than C50; the annular isolation belt and the inner pier foot protector can simultaneously perform integral concrete pouring, and the concrete strength is not lower than C60;
And (5) installing a top capping beam, and finishing the construction of the combined pier structure.
The beneficial effects of the invention are as follows:
The combined pier structure has the advantages of convenient production, hoisting and transportation, simple and convenient construction process, shortened construction period in a field assembly mode, and reduced field manpower and construction cost; the combined pier structure can be cast separately, the strength grades of concrete during the cast separately can be different, and the construction cost can be reduced under the condition of ensuring the installation quality of piers.
Drawings
Fig. 1 is a schematic view of a prefabricated high-strength concrete composite pier structure according to the first embodiment;
fig. 2 is a schematic diagram of a prefabricated high-strength concrete combined pier structure according to a second embodiment;
fig. 3 is a longitudinal sectional view of a bridge pier main body portion;
fig. 4 is a transverse cross-sectional view of a bridge pier body portion;
Fig. 5 is a schematic view of the structure of the outer wall of the inner pier provided with the outer wrapping reinforcement bars;
Fig. 6 is a schematic structural view of an outer pier outer wall provided with an outer reinforcement.
The marks in the figure: 1. a capping beam; 2. reinforcing steel bars; 3. an outer pier; 4. an inner pier; 5. a barrier ring belt; 6. the inner pier protects the feet; 7. a boss; 8. the outer end of the foot protector; 9. a base; 10. a concrete pile; 11. an external adhesion promoting bond; 12. an internal adhesion promoting bond; 13. a groove; 14. wrapping reinforcing steel bars; 15. reinforcing ribs.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
Example 1
The embodiment provides a prefabricated high-strength concrete combined pier structure shown in fig. 1, which comprises a concrete pile 10, a concrete base 9 and piers, wherein the concrete pile 10 is arranged below the concrete base 9. The pier comprises at least one pier unit, the pier unit comprises an inner pier 3, an outer pier 4, an inner pier guard 6 and an outer pier guard 8, as shown in fig. 3 and 4, the inner pier 3 is of a round integral through-long hollow structure, the outer pier 4 is of a round integral through-long hollow structure or an assembled hollow structure, the ratio of the outer diameter of the outer pier 4 to the outer diameter of the inner pier 3 is 1.2-2.5, the ratio of the thickness of the inner pier 3 to the thickness of the outer pier 4 is 1.5-4.5, at least one boss 7 is arranged on the upper portion of a concrete base 9, the boss 7 is positioned inside the inner pier 3, the inner pier guard 6 is arranged between the inner pier 3 and the outer pier 4, the outer pier guard 8 is arranged outside the outer pier 4, and a spacer ring belt 5 is arranged above the inner pier guard 6 between the inner pier 3 and the outer pier 4. And after the inner pier and the outer pier are arranged on the boss of the base, the prefabricated high-strength concrete combined pier structure is formed by the inner pier and the outer pier and a spacing ring belt between the inner pier and the outer pier. The cross-sectional shapes of the inner pier and the outer pier in the present invention are not limited to the circular shapes listed in the present embodiment, but may be various shapes such as an outer polygon, an inner circle (including a square shape), etc., and the present embodiment is described only by taking a circular shape as an example.
The combined pier structure is convenient to produce, hoist and transport, the construction process is simple and convenient, the construction period can be shortened by the on-site assembly mode, and the on-site manpower and the construction cost are reduced; the separately poured concrete of this embodiment has different strength grades, and can reduce construction cost while ensuring pier installation quality.
In the embodiment, an inner tackifying key 12 is arranged at the upper part of the outer side of the inner pier 3, and the inner tackifying key 12 is a convex steel or convex-concave concrete thread; and/or the inner side of the outer pier 4 is provided with an outer tackifying key 11, and the outer tackifying key 11 is a convex steel or convex-concave concrete thread. By arranging the tackifying key with a special structure, the concrete between the inner pier 3 and the spacer ring belt 5 and the concrete between the outer pier 4 and the spacer ring belt 5 are firmly and firmly bonded.
In this embodiment, as shown in fig. 5, the outer side of the inner pier 3 includes an outer side lower part connected with the inner pier guard 6, and an outer side upper part not connected with the inner pier guard 6, the outer side lower part of the inner pier 3 is provided with an outer wrapping steel pipe 14, the outer side of the outer wrapping steel pipe 14 is provided with a reinforcing rib 15, the inner pier guard 6 is provided with a reinforcement cage, the reinforcing rib 15 is of an outer protruding steel structure, and is arranged along the circumference of the outer wrapping steel pipe 14, and after the reinforcing rib 15 stretches into the reinforcement cage in a staggered manner, the reinforcing rib 15 is fixedly connected with the reinforcement cage. In this embodiment, the length of the outer-coated steel tube is not less than 100cm. The structure ensures that the inner pier is firmly and firmly bonded with the concrete at the annular belt. As shown in fig. 6, the outer side of the outer pier 4 comprises an outer side lower portion connected with the outer pier guard leg 8 and an outer side upper portion not connected with the outer pier guard leg 8, the outer side lower portion of the outer pier 4 is provided with an outer packing steel pipe 14, the outer side of the outer packing steel pipe 14 is provided with a reinforcing rib 15, the outer pier guard leg 8 is provided with a reinforcement cage, the reinforcing rib 15 is of an outer protruding steel structure and is arranged along the circumferential direction of the outer packing steel pipe 14, and after the reinforcing rib 15 stretches into the reinforcement cage in a staggered manner, the outer pier guard leg is fixedly connected with the reinforcement cage.
In this embodiment, the steel reinforcement cage includes framework of steel reinforcement cage, stirrup, the framework of steel reinforcement cage includes outer framework of steel reinforcement cage and inlayer framework of steel reinforcement cage, the main muscle of outer framework of steel reinforcement cage sets up the inboard at the stirrup, the main muscle of inlayer framework of steel reinforcement cage sets up the outside at the stirrup. The main muscle of outer framework of steel cage sets up in the inboard of stirrup, and the main muscle of inlayer framework of steel cage sets up in the outside of stirrup, more accords with pier at actual atress, guarantees pier structure's stability. The steel reinforcement cage in this embodiment can exceed pier body length, can exceed the length of interior mound 3, outer mound 4 pier body self, provides the reinforcing bar anchor for later stage and superstructure's connection.
In this embodiment, the pier may include a plurality of pier units, that is, the pier includes an inner pier 3, a first middle pier, a second middle pier, a third middle pier … … and an outer pier 4, an inner pier protecting leg 6 is disposed on the lower side between adjacent piers, and a spacer ring 5 is disposed on the upper side between adjacent piers. The present embodiment will be described by taking the case of including one bridge pier unit as shown in fig. 1 as an example.
In this embodiment, the annular spacer belt 5 may be cast with a cementing material, or cast with a dispersion material, or may be left hollow, or may be cast with a cementing material only in a partial height range.
In this embodiment, the inner pier 3 and the outer pier 4 are both internally provided with the steel bars 2 with the through length, the length of the steel bars 2 is greater than or equal to the length of the pier body, and this embodiment is only described by the case that the length of the steel bars 2 is greater than the length of the pier body as exemplified in fig. 1, and the upper ends of the steel bars 2 penetrate out from the upper portion of the pier.
In this embodiment, when the outer pier 4 is in an assembled hollow structure, a structure formed by assembling at least two semi-circular arcs can be adopted, and a connecting device is arranged between adjacent circular arcs.
In the embodiment, grouting sleeves can be arranged at the tops of the inner pier 3 and the outer pier 4; the inner pier guard feet are round, the outer diameter of the inner pier guard feet is smaller than the inner diameter of the outer pier, and the outer pier guard feet are round or polygonal; the boss is a reinforced concrete solid cylinder or a reinforced concrete hollow cylinder; the concrete piles are precast piles, steel pipe concrete piles and cast-in-place piles.
The construction method for prefabricating the high-strength concrete combined pier structure of the embodiment comprises the following steps:
(1) And (3) constructing a concrete pile: adopting construction equipment to construct the concrete pile;
(2) And (3) base construction: connecting the prefabricated base with the boss or the groove and the boss with the concrete pile; or connecting the base cast in situ with concrete and then manufacturing a boss or a concave table;
(3) And (3) inner pier construction: manufacturing a reinforcement cage on the outer side of a boss, after an inner pier is arranged on the outer side of the boss on a base, pouring concrete to form an inner pier protection angle, wherein the strength grade of the concrete of an inner pier protection foot is not lower than C50, and when a tackifying key of the inner pier is in a non-threaded shape, inserting the inner pier into the inner boss on the base after the tackifying key is arranged on the outer side of the inner pier; the inner pier is manufactured by adopting a prestress tensioning process and a centrifugal forming process in a factory, the strength grade of the pier body concrete is larger than C60, and the steel bar tensioning force of the inner pier is 0.65-0.75 times of the standard value of the steel bar tensile strength
(4) And (3) outer pier construction: when the outer pier is an integral hollow pier, the outer pier is directly arranged on the inner pier guard leg on the base, and when the outer pier is an assembled type, the inner pier guard legs of all assembled rings are abutted, and then the outer pier is assembled into the integral outer pier. The outer pier is manufactured by adopting a prestress tensioning process and a centrifugal forming process in a factory, the strength grade of pier body concrete is larger than C70, and the tensile force of the steel bars is 0.2-0.35 times of the standard tensile strength of the steel bars;
(5) Outer pier foot protection construction: and (3) foot protection construction is carried out on the bottom of the outer pier, and the strength grade of the outer pier concrete is not lower than C50.
(6) And (3) construction of a spacer ring belt: and after the outer pier foot protector is installed, concrete is poured on the spacer ring belt between the inner pier and the outer pier, and the strength grade of the concrete is not lower than C50.
(7) And (5) installing a top capping beam, and finishing the construction of the combined pier structure.
Preferably, in the construction method of the high-strength concrete combined pier structure, the annular isolation belt and the inner pier foot protector can simultaneously perform integral concrete pouring, and the concrete strength is not lower than C60.
When the base is prefabricated, the steps (1) and (2) of the construction method of the high-strength concrete combined pier structure can be synchronously performed;
Example two
The embodiment provides a prefabricated high-strength concrete combined pier structure shown in fig. 2. The prefabricated high-strength concrete combined pier structure is basically the same as that of the first embodiment, and the same parts are not repeated here. The main difference between this embodiment and the present embodiment is that the boss 7 and the guard leg portion of the pier of the first embodiment protrude from the base 9, and the pier of this embodiment is provided with a groove 13 on the base 9, and the boss 7 and the guard leg portion are disposed in the groove 13.
The prefabricated high-strength concrete combined pier structure of the embodiment enables the pier to penetrate into the base, is favorable for reducing the space occupied by the combined pier structure in the longitudinal direction, and enables the pier structure to be firmer.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and improvements could be made by those skilled in the art without departing from the inventive concept, which fall within the scope of the present invention.
Claims (9)
1. Prefabricated high-strength concrete combination formula pier structure, including concrete pile (10), concrete base (9) and pier, concrete pile (10) set up in the below of concrete base (9), its characterized in that: the bridge pier comprises at least one bridge pier unit, the bridge pier unit comprises an inner pier (3), an outer pier (4), an inner pier protecting foot (6) and an outer pier protecting foot (8), the inner pier (3) is of an integral through-length hollow structure, the outer pier (4) is of an integral through-length hollow structure or an assembled hollow structure, the ratio of the outer diameter of the outer pier (4) to the outer diameter of the inner pier (3) is 1.2-4.2, the ratio of the thickness of the inner pier (3) to the thickness of the outer pier (4) is 1.5-4.5, at least one boss (7) is arranged on the upper portion of the concrete base (9), the boss (7) is positioned inside the inner pier (3), the inner pier protecting foot (6) is arranged between the inner pier (3) and the outer pier (4), the outer pier protecting foot (8) is arranged outside the outer pier (4), and a spacer (5) is arranged above the inner pier protecting foot (6) between the inner pier (3) and the outer pier (4). The outer side of the inner pier (3) comprises an outer side lower part connected with an inner pier guard leg (6) and an outer side upper part not connected with the inner pier guard leg (6), an outer wrapping steel pipe (14) is arranged at the outer side lower part of the inner pier (3), a reinforcing rib (15) is arranged at the outer side of the outer wrapping steel pipe (14), a reinforcement cage is arranged at the inner pier guard leg (6), the reinforcing rib (15) is of an outer protruding steel structure and is arranged along the circumferential direction of the outer wrapping steel pipe (14), and the reinforcing rib (15) is fixedly connected with the reinforcement cage after extending into the reinforcement cage in a staggered mode; the outer side of the outer pier (4) comprises an outer side lower part connected with an outer pier guard leg (8) and an outer side upper part not connected with the outer pier guard leg (8), an outer wrapping steel pipe (14) is arranged at the outer side lower part of the outer pier (4), a reinforcing rib (15) is arranged at the outer side of the outer wrapping steel pipe (14), a reinforcement cage is arranged at the outer pier guard leg (8), the reinforcing rib (15) is of an outer protruding steel structure and is arranged along the circumferential direction of the outer wrapping steel pipe (14), and the reinforcing rib (15) is fixedly connected with the reinforcement cage after extending into the reinforcement cage in a staggered mode; the inner pier (3) and the outer pier (4) are internally provided with steel bars (2) with through length.
2. The prefabricated high-strength concrete composite pier structure according to claim 1, wherein: an inner tackifying key (12) is arranged at the upper part of the outer side of the inner pier (3), and the inner tackifying key (12) is a convex steel or convex-concave concrete thread; and/or the inner side of the outer pier (4) is provided with an outer tackifying key (11), and the outer tackifying key (11) is a convex steel or convex-concave concrete thread.
3. The prefabricated high-strength concrete composite pier structure according to claim 1, wherein: the steel reinforcement cage includes framework of steel reinforcement cage, stirrup, the framework of steel reinforcement cage includes outer framework of steel reinforcement cage and inlayer framework of steel reinforcement cage, the main muscle of outer framework of steel reinforcement cage sets up the inboard at the stirrup, the main muscle of inlayer framework of steel reinforcement cage sets up the outside at the stirrup.
4. The prefabricated high-strength concrete composite pier structure according to claim 1, wherein: the pier comprises a plurality of pier units, namely the pier comprises an inner pier (3), a first middle pier, a second middle pier and a third middle pier … … outer pier (4), inner pier guard feet (6) are arranged on the lower sides between adjacent piers, and spacer ring belts (5) are arranged on the upper sides between the adjacent piers.
5. The prefabricated high-strength concrete composite pier structure according to claim 1, wherein: the spacer ring belt (5) is poured with cementing material, or is poured with dispersion material, or is reserved to be hollow, or is poured with cementing material only in a partial height range.
6. The prefabricated high-strength concrete composite pier structure according to claim 1, wherein: the base (9) is provided with a groove (13), and the boss (7) and the foot protection part of the bridge pier are arranged in the groove (13).
7. The prefabricated high-strength concrete composite pier structure according to claim 1, wherein: the length of the steel bar (2) is greater than or equal to the length of the pier body, and when the length of the steel bar (2) is greater than the length of the pier body, the upper end of the steel bar (2) penetrates out of the upper part of the pier.
8. The prefabricated high-strength concrete composite pier structure according to claim 1, wherein: when the outer pier (4) is of an assembled hollow structure, the outer pier is formed by assembling at least two semicircular arcs, and a connecting device is arranged between the adjacent arcs.
9. The construction method of a prefabricated high-strength concrete composite pier structure according to any one of claims 1 to 8, comprising:
And (3) constructing a concrete pile: adopting construction equipment to construct the concrete pile;
And (3) constructing a concrete base: connecting the precast concrete base with the concrete pile; when the concrete base is prefabricated, the concrete pile construction steps and the concrete base construction steps can be synchronously performed;
And (3) inner pier construction: manufacturing a reinforcement cage on the outer side of the boss, and after the inner pier is arranged on the outer side of the boss on the base, pouring concrete to form an inner pier angle bead, wherein the strength grade of the concrete of the inner pier angle bead is not lower than C50; the inner pier is manufactured by adopting a prestress tensioning process and a centrifugal forming process in a factory, the strength grade of pier body concrete is larger than C60, and the steel bar tensioning force of the inner pier is 0.65-0.75 times of the standard steel bar tensile strength value;
And (3) outer pier construction: when the outer pier is an integral hollow pier, the outer pier is directly arranged on the outer side of the inner pier guard leg on the base, and when the outer pier is an assembled type, the inner pier guard legs of all assembled rings are abutted, and then the outer pier is assembled into an integral outer pier; the outer pier is manufactured by adopting a prestress tensioning process and a centrifugal forming process in a factory, the strength grade of pier body concrete is larger than C70, and the tensile force of the steel bar is 0.2-0.35 times of the standard tensile strength value of the steel bar;
Outer pier foot protection construction: foot protection construction is carried out on the bottom of the outer pier, and the strength grade of the outer pier concrete is not lower than C50;
And (3) construction of a spacer ring belt: pouring concrete into the spacer ring between the inner pier and the outer pier, wherein the strength grade of the concrete is not lower than C50; the annular isolation belt and the inner pier foot protector can simultaneously perform integral concrete pouring, and the concrete strength is not lower than C60;
And (5) installing a top capping beam, and finishing the construction of the combined pier structure.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910506171.4A CN110205919B (en) | 2019-06-12 | 2019-06-12 | Prefabricated high-strength concrete combined pier structure and construction method thereof |
| PCT/CN2019/094971 WO2020248313A1 (en) | 2019-06-12 | 2019-07-08 | Precast high-strength concrete composite bridge pier structure and construction method therefor |
| AU2019101278A AU2019101278A4 (en) | 2019-06-12 | 2019-10-22 | Prefabricated high-strength concrete combined pier structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111236052A (en) * | 2020-03-09 | 2020-06-05 | 上海市城市建设设计研究总院（集团）有限公司 | Assembling structure and assembling method for door type pier prefabricated capping beam and prefabricated stand column |
| CN113073541A (en) * | 2021-04-01 | 2021-07-06 | 创辉达设计股份有限公司 | Combined capping beam suitable for continuous bridge deck construction, bridge and construction process |
| CN114561866A (en) * | 2022-03-01 | 2022-05-31 | 中铁二院贵阳勘察设计研究院有限责任公司 | Be applicable to abrupt slope topography area binder opening formula abutment |
| CN115042316A (en) * | 2022-06-28 | 2022-09-13 | 中交四公局第三工程有限公司 | Prefabricated construction method for assembled bridge pier column |
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| JP6243366B2 (en) * | 2014-09-08 | 2017-12-06 | Ｊｆｅシビル株式会社 | Pier structure |
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| CN108411771A (en) * | 2018-04-24 | 2018-08-17 | 中铁工程设计咨询集团有限公司 | The pier bottom structure and its assembly method of single track bridge pier, single track bridge pier |
| CN208907206U (en) * | 2018-09-25 | 2019-05-28 | 中南大学 | A kind of hollow multi-cavity round end type concrete pier of steel tube of assembled |
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2019
- 2019-06-12 CN CN201910506171.4A patent/CN110205919B/en active Active
- 2019-07-08 WO PCT/CN2019/094971 patent/WO2020248313A1/en active Application Filing
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| JPH06264412A (en) * | 1992-10-08 | 1994-09-20 | Keihan Concrete Kogyo Kk | Prefabrication method of bridge pier and bridge pier concrete block |
| CN104746422A (en) * | 2014-09-19 | 2015-07-01 | 杭州江润科技有限公司 | Bridge prefabricated hollow pier column post-poured connecting structure and construction method |
| CN205313967U (en) * | 2015-11-30 | 2016-06-15 | 中铁二十四局集团安徽工程有限公司 | Connection construction between precast pier and bearing platform |
| CN207878263U (en) * | 2017-12-27 | 2018-09-18 | 中交第二航务工程局有限公司 | Half precast pier segment and 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 |
| CN210420850U (en) * | 2019-06-12 | 2020-04-28 | 建华建材（中国）有限公司 | Prefabricated high-strength concrete combined pier structure |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020248313A1 (en) | 2020-12-17 |
| CN110205919A (en) | 2019-09-06 |
| AU2019101278A4 (en) | 2019-12-05 |
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