AU2019101278A4 - 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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- AU2019101278A4 AU2019101278A4 AU2019101278A AU2019101278A AU2019101278A4 AU 2019101278 A4 AU2019101278 A4 AU 2019101278A4 AU 2019101278 A AU2019101278 A AU 2019101278A AU 2019101278 A AU2019101278 A AU 2019101278A AU 2019101278 A4 AU2019101278 A4 AU 2019101278A4
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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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Abstract
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 5 a pier, wherein the concrete pile is arranged below the concrete base, and the pier comprises at least one pier unit. The pier unit comprises an inner pier, an outer pier, an inner pier foot guard and an outer pier foot guard, wherein the inner pier is of an integral full-length hollow structure, and the outer pier is of an integral full-length hollow structure or an assembled hollow structure. The upper part of the concrete base is provided with at least one boss, and a 10 separating ring-belt is arranged between the inner pier and the outer pier. The combined pier structure according to the present invention has the advantages that it is convenient for manufacturing, hoisting and transporting, and has simple, convenient and fast construction process. Apart from that, the construction period can be shortened via an on-site assembling mode, and on-site manpower and construction cost can be reduced; and according to the 15 invention, as the combined pier structure can be poured separately, the strength grades of the separately poured concrete are different such that the construction cost can be reduced under the condition of ensuring the installation quality of the pier. 1--1
Description
Prefabricated High-Strength Concrete Combined Pier Structure and Construction
Method Thereof
FIELD OF THE INVENTION
The invention relates to the technical field of building bridges, in particular to a pier shape and structure improvement and a pier construction method in the bridge field. Specifically, the invention relates to a prefabricated high-strength concrete combined pier structure and a construction method thereof.
BACKGROUND OF THE INVENTION
In overpass piers of highways and municipal roads, in most circumstances the concrete is poured after on-site formwork is conducted. As the cast-in-place concrete pier is greatly influenced by the field environment, and due to the fact that on-site formwork and form stripping are needed, the construction period of the urban overpass pier cannot be guaranteed, influencing the surrounding environment to a certain extent. When the pier is a hollow section, a dual-mode structure is adopted, wherein the installation of the mold is complex, and the construction period is long, and the construction process of the concrete pier has the problems of complex manufacturing of reinforcing cages, low concrete compressive strength of the pile body and the like, causing the issues of excessive consumption of concrete, steel and other materials during pouring manufacturing, and wasting national resources without guaranteeing the quality.
The piers of some projects are transformed from cast-in-place to factory prefabrication, but in the prefabrication process of piers it is common that the degree of mechanization is not high, especially in the manufacture of reinforcing cages which is still mostly carried out via manual binding. This not only affects working efficiency, but also leads to poor firmness of reinforcing cages due to human factors, easy sliding of main reinforcement, and easy dislocation of main reinforcement and even serious quality problems such as exposed main reinforcement in the prefabrication process of piers. When the diameter of a pier is large or a pier is thick, the mass of a single pier is excessively heavy, and the influence on manufacturing, transportation and hoisting efficiency is huge.
any references to prior art should not be taken as admissions of common general knowledge in the field.
SUMMARY OF THE INVENTION
In order to settle the above problems, the invention provides a prefabricated concrete combined pier structure, which is excellent in topological form, good in mechanical property, high in concrete strength grade, simple and convenient in manufacturing process, convenient in hoisting and transporting, convenient in constructing on site, and economical and efficient, to solve the problems existing in concrete piers poured on site and prefabricated piers.
The invention further aims to provide a construction method for a prefabricated high-strength concrete combined pier, which has the advantages of excellent mechanical property, high concrete strength grade, convenience in factory manufacturing, hoisting and transporting, simple and convenient construction process, and the benefits of being economic and efficient. In order to solve the technical problem, the invention adopts the following mode.
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, and the pier comprises at least one pier unit. The pier unit comprises an inner pier, an outer pier, an inner pier foot guard and an outer pier foot guard, wherein the inner pier is of an integral full-length hollow structure, and the outer pier is of an integral full-length hollow structure or an assembled hollow structure. The ratio of the outer diameter of the outer pier to that of the inner pier is 1.2-4.2, and the ratio of the thickness of the inner pier to that of the outer pier is 1.5-4.5. At least one boss is arranged on the upper part of the concrete base, and the boss is arranged inside the inner pier, and an inner pier foot guard is arranged between the inner pier and the outer pier. The outer pier foot guard is arranged outside the outer pier, and a separating ring-belt is arranged above the inner pier foot guard between the inner pier and the outer pier.
Further, the upper part of the outer side of the inner pier is provided with an inner tackifying key, and the inner tackifying key is convex steel or convex-concave concrete thread; and/or an outer tackifying key is arranged on the inner side of the outer pier, and the outer tackifying key is convex steel or convex-concave concrete thread.
Further, the outer side of the inner pier comprises an outer lower part connected with the inner pier foot guard and an outer upper part not connected with the inner pier foot guard, wherein the outer lower part of the inner pier is provided with a covering steel pipe, and the outer side of the covering steel pipe is provided with a reinforcing rib, and a reinforcing cage is arranged at the inner pier foot guard, and the reinforcing rib is of a convex steel structure and arranged along the circumferential direction around the covering steel pipe, and the reinforcing rib extends into the reinforcing cage in a staggered mode and then is fixedly connected with the reinforcing cage; and the outer side of the outer pier comprises an outer lower part connected with the outer pier foot guard and an outer upper part not connected with the outer pier foot guard, and the outer lower part of the outer pier is provided with a covering steel pipe, and the outer side of the covering steel pipe is provided with a reinforcing rib, and a reinforcing cage is arranged at the outer pier foot guard, and the reinforcing rib is of a convex steel structure and arranged along the circumferential direction around the covering steel pipe, and the reinforcing rib is fixedly connected with the reinforcing cage after extending into the reinforcing cage in a staggered mode.
Further, the reinforcing cage comprises a reinforcing framework cage and a stirrup, wherein the reinforcing framework cage comprises an outer reinforcing framework cage and an inner reinforcing framework cage, and the main reinforcement of the outer reinforcing framework cage is arranged at the inner side of the stirrup, and the main reinforcement of the inner reinforcing framework cage is arranged at the outer side of the stirrup.
Further, the pier comprises a plurality of pier units, namely the pier comprises an inner pier, a first middle pier, a second middle pier, a third middle pier...and an outer pier, wherein the inner pier foot guard is arranged on the lower sides between adjacent piers, and the separating ring-belt is arranged on the upper sides between adjacent piers.
Further, the separating ring-belt is poured with cementitious material or discrete material, or a hollow may be reserved, or cementitious material may be cast only in a partial height range.
Further, the boss and the foot guard part of the pier are arranged protruding out of the base, or a groove is provided on the base and the boss and the foot guard part of the pier are provided in the groove.
Further, a full-length rebar is arranged inside both the inner pier and the outer pier, wherein the length of the rebar is greater than or equal to the length of the pier body, and when the length of the rebar is greater than the length of the pier body, the upper end of the rebar passes out from the upper part of the pier.
Further, when the outer pier is of an assembled hollow structure, it is formed by assembling at least two semicircles, and connecting devices are arranged between adjacent circular arcs.
The invention also provides a construction method of a prefabricated high-strength concrete combined pier structure, including the following:
concrete pile construction: adopting construction devices to carry out concrete pile construction;
concrete base construction: connecting a prefabricated concrete base with a concrete pile; and when a concrete base is prefabricated, it being possible that the concrete pile construction step and the concrete base construction step can be synchronously carried out;
inner pier construction: manufacturing a reinforcing cage on the outer side of a boss, and pouring concrete to form an inner pier foot guard after installing an inner pier on the outer side of the boss on the base, wherein the concrete strength grade of the inner pier foot guard is not lower than C50; and the inner pier being manufactured in a factory by adopting a presttess tension process and a centrifugal molding process, and the concrete strength grade of the pier body being higher than C60, and the tensioning force of the rebar of the inner pier being
0.65-0.75 times of the standard value of the tensile strength of the rebar;
outer pier construction: when an outer pier is an integral hollow pier, the outer pier being directly mounted on the outer side of the inner pier foot guard on the base; when the outer pier is of assembled type, the inner pier foot guard of each assembled ring being tightly abutted backward and then assembled into the integral outer pier; and the outer pier being manufactured in a factory by adopting a presttess tension process and a centrifugal molding process, and the concrete strength grade of the pier body being higher than C70, and the tensioning force of the rebar being 0.2-0.35 times of the standard value of the tensile strength of the rebar;
outer pier foot guard construction: performing foot guard construction on the bottom of the outer pier, wherein the concrete strength grade of the outer pier is not lower than C50; separating ring-belt construction: pouring concrete on the separating ring-belt between the inner pier and the outer pier, wherein the strength grade of the concrete is not lower than C50; and it being possible that the separating ring-belt and the inner pier foot guard can carry out integrated concrete pouring at the same time, wherein the concrete strength is not lower than C60;
and installing a top bent cap, and the construction of the combined pier structure being completed.
The invention has the beneficial effects that:
the combined pier structure according to the present invention has the advantages that it is convenient for manufacturing, hoisting and transporting, and has simple, convenient and fast construction process. Apart from that, the construction period can be shortened via an on-site assembling mode, and on-site manpower and construction cost can be reduced; and according to the invention, as the combined pier structure can be poured separately, the strength grades of the separately poured concrete can be different such that the construction cost can be reduced under the condition of ensuring the installation quality of the pier.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic view of a prefabricated high-strength concrete combined pier structure according to Embodiment 1;
Fig. 2 is a schematic view of a prefabricated high-strength concrete combined pier structure according to Embodiment 2;
Fig. 3 is a longitudinal sectional view of the main body portion of a pier;
Fig. 4 is a transverse sectional view of the main body portion of a pier;
Fig. 5 is a schematic view of a structure in which the outer wall of an inner pier is provided with a reinforcement cover;
Fig. 6 is a schematic view of a structure in which the outer wall of an outer pier is provided with a reinforcement cover.
Reference numerals: 1, bent cap; 2, reinforcement; 3, outer pier; 4, inner pier; 5, separating ring-belt; 6, inner pier foot guard; 7, boss; 8, outer pier foot guard; 9, base; 10, concrete pile; 11, outer tackifying key; 12, inner tackifying key; 13, groove; 14, covering steel pipe; and 15, reinforcing rib.
DETAILED DESCRIPTION OF THE INVENTION
The feature of preferred embodiment will now be described in detail with reference to the accompanying drawings and embodiments.
Embodiment 1
The embodiment provides a prefabricated high-strength concrete combined pier structure shown in Fig. 1, including a concrete pile 10, a concrete base 9 and a pier, wherein the concrete pile 10 is arranged below the concrete base 9. The pier comprises at least one pier unit, wherein the pier unit comprises an inner pier 3, an outer pier 4, an inner pier foot guard 6 and an outer pier foot guard 8, as shown in Figs. 3 and 4. The inner pier 3 is of a circular overall full-length hollow structure, and the outer pier 4 is of a circular overall full-length hollow structure or an assembled hollow structure. The ratio of the outer diameter of the outer pier 4 to that of the inner pier 3 is 1.2-2.5, and the ratio of the thickness of the inner pier 3 to that of the outer pier 4 is 1.5-4.5. At least one boss 7 is arranged on the upper part of the concrete base 9, and the boss 7 is positioned inside the inner pier 3. The inner pier foot guard 6 is arranged between the inner pier 3 and the outer pier 4, and the outer pier foot guard 8 is arranged outside the outer pier 4, and a separating ring-belt 5 is arranged above the inner pier foot guard 6 between the inner pier 3 and the outer pier 4. The inner pier and the outer pier are arranged on the boss of the base and then form a prefabricated high-strength concrete combined pier structure with the separating ring-belt between the inner pier and the outer pier. It should be noted that the cross-sectional shape of the inner pier and the outer pier in the feature of preferred embodiment is not limited to a circular shape exemplified in the present embodiment, but may also be of a variety of shapes such as outer-polygon-inner-circle (including square) and the like, and the present embodiment is only exemplified by a circular shape.
The combined pier structure according to the feature of preferred embodiment is convenient for manufacturing, hoisting and transporting, and has simple, convenient and fast construction process. Apart from that, the construction period can be shortened via such an on-site assembling mode, and on-site manpower and construction cost can be reduced; and according to the embodiment, the strength grades of the separately poured concrete are different such that the construction cost can be reduced under the condition of ensuring the installation quality of the pier.
In the embodiment, the upper part of the outer side of the inner pier 3 is provided with an inner tackifying key 12, wherein the inner tackifying key 12 is 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, wherein the outer tackifying key 11 is convex steel or convex-concave concrete thread. The concrete bonding between the inner pier 3 and the separating ring-belt 5, and between the outer pier 4 and the separating ring-belt 5 is firmer and more reliable by arranging the tackifying key with a special structure.
In the embodiment, as shown in Fig. 5, the outer side of the inner pier 3 comprises an outer lower part connected with the inner pier foot guard 6 and an outer upper part not connected with the inner pier foot guard 6. The outer lower part of the inner pier 3 is provided with a covering steel pipe 14, and the outer side of the covering steel pipe 14 is provided with a reinforcing rib 15. A reinforcing cage is arranged at the inner pier foot guard 6. The reinforcing rib 15 is of a convex steel structure and arranged along the circumferential direction around the covering steel pipe 14. The reinforcing rib 15 extends into the reinforcing cage in a staggered mode and then is fixedly connected with the reinforcing cage. In this embodiment, the length of the covering steel pipe is no less than 100 cm. The structure enables the concrete at the position of the inner pier and the separating ring-belt to be more firmly bonded and fastened. As shown in Fig. 6, the outer side of the outer pier 4 comprises an outer lower part connected with the outer pier foot guard 8 and an outer upper part not connected with the outer pier foot guard 8. The outer lower part of the outer pier 4 is provided with a covering steel pipe 14, and the outer side of the covering steel pipe 14 is provided with a reinforcing rib 15. A reinforcing cage is arranged at the outer pier foot guard 8, and the reinforcing rib 15 is of a convex steel structure and arranged along the circumferential direction around the covering steel pipe 14. The reinforcing rib 15 extends into the reinforcing cage in a staggered mode and then is fixedly connected with the reinforcing cage.
In the embodiment, the reinforcing cage comprises a reinforcing framework cage and a stirrup, wherein the reinforcing framework cage comprises an outer reinforcing framework cage and an inner reinforcing framework cage, and the main reinforcement of the outer reinforcing framework cage is arranged at the inner side of the stirrup and the main reinforcement of the inner reinforcing framework cage is arranged at the outer side of the stirrup. The main reinforcement of the outer reinforcing framework cage is arranged at the inner side of the stirrup, and the main reinforcement of the inner reinforcing framework cage is arranged at the outer side of the stirrup, so that the actual stress of the pier is better met and the stability of the pier structure is ensured. The reinforcing framework cage in the embodiment can exceed the length of the pier body, namely, the length of the pier body of the inner pier 3 or the length of the pier body of the outer pier 4, to provide a reinforcement anchoring for later connection with an upper structure.
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 foot guard 6 is provided on the lower sides between adjacent piers, and a separating ring-belt 5 is provided on the upper sides between adjacent piers. The present embodiment is described by way of example only in the case of including one pier unit as shown in Fig. 1.
In this embodiment, the separating ring-belt 5 may be cast with cementitious material or discrete material. Or a hollow may be reserved, or cementitious material may be cast only in a partial height range.
In this embodiment, the inside of the inner pier 3 and the inside of the outer pier 4 are provided with a full-length rebar 2, wherein the length of the rebar 2 is greater than or equal to the length of the pier body. This embodiment is described only in the case where the length of the rebar 2 is greater than the length of the pier body as exemplified in Fig. 1, and the upper end of the rebar 2 passes out from the upper part of the pier.
In the embodiment, when the outer pier 4 is of an assembled hollow structure, a structure formed by assembling at least two semicircles can be adopted, and a connecting device is arranged between adjacent circular arcs.
In the embodiment, a grouting sleeve can be arranged at the top of both the inner pier 3 and the outer pier 4; the inner pier foot guard is round, and the outer diameter of the inner pier foot guard is smaller than the inner diameter of the outer pier, and the outer pier foot guard is round or polygonal; the boss is a reinforced concrete solid cylinder or a reinforced concrete hollow cylinder; and the concrete pile is a prefabricated pile, a steel pipe concrete pile and a cast-in-place pile.
A construction method of the prefabricated high-strength concrete combined pier structure according to the present embodiment includes the following:
(1) concrete pile construction: adopting construction devices to carry out concrete pile construction;
(2) base construction: connecting a prefabricated base having a boss or a boss in a groove with a concrete pile; or manufacturing a boss or a concave platform after connecting a cast-in-place base with the concrete;
(3) inner pier construction: manufacturing a reinforcing cage on the outer side of the boss, and pouring concrete to form an inner pier foot guard after installing the inner pier on the outer side of the boss on the base, wherein the concrete strength grade of the inner pier foot guard is not lower than C50, and when the tackifying key of the inner pier is non-threaded, inserting the inner pier into the inner boss on the base after the tackifying key is installed on the outer side of the inner pier; and the inner pier being manufactured in a factory by adopting a prestress tension process and a centrifugal molding process, and the concrete strength grade of the pier body being higher than C60, and the tensioning force of the rebar of the inner pier being 0.65-0.75 times of the standard value of the tensile strength of the rebar;
(4) outer pier construction: when the outer pier is an integral hollow pier, the outer pier being directly mounted on the inner pier foot guard on the base; when the outer pier is of assembled type, the inner pier foot guard of each assembled ring being tightly abutted backward and then assembled into the integral outer pier; and the outer pier being manufactured in a factory by adopting a prestress tension process and a centrifugal molding process, and the concrete strength grade of the pier body being higher than C70, and the tensioning force of the rebar being 0.2-0.35 times of the standard value of the tensile strength of the rebar;
(5) outer pier foot guard construction: performing foot guard construction on the bottom of the outer pier, wherein the concrete strength grade of the outer pier is not lower than C50;
(6) separating ring-belt construction: pouring concrete on the separating ring-belt between the inner pier and the outer pier after the outer pier foot guard is installed, wherein the strength grade of the concrete is not lower than C50;
and (7) installing a top bent cap, and the construction of the combined pier structure being completed.
Preferably, according to the construction method of the high-strength concrete combined pier structure, the separating ring-belt and the inner pier foot guard can simultaneously carry out integral concrete pouring, and the concrete strength is not lower than C60.
When the base is prefabricated, step (1) and (2) of the construction method of the high-strength concrete combined pier structure can be synchronously carried out;
Embodiment 2
The embodiment provides a prefabricated high-strength concrete combined pier structure as shown in Fig. 2. The prefabricated high-strength concrete combined pier structure is basically the same as the pier structure of Embodiment 1, and the same parts will not be described in
2019101278 22 Oct 2019 detail herein. The difference is mainly that the boss 7 and the foot guard portion of the pier of
Embodiment 1 are arranged to protrude from the base 9, while the pier of the embodiment has a groove 13 provided on the base 9, and the boss 7 and the foot guard portion are arranged in the groove 13.
The prefabricated high-strength concrete combined pier structure of the embodiment enables the pier to go deep into the inside of the base which is beneficial to reducing the space occupied by the whole combined pier structure in the longitudinal direction, and in the meantime it enables the pier structure to be more stable.
The above is only a preferred embodiment of the feature of preferred embodiment, and it 10 will be understood by those skilled in the art that various changes and modifications may be made without departing from the inventive concept, and these are within the scope of the feature of preferred embodiment.
Claims (10)
1. A prefabricated high-strength concrete combined pier structure, including a concrete pile (10), a concrete base (9) and a pier, wherein the concrete pile (10) is arranged below the concrete base (9), characterized in that the pier comprises at least one pier unit wherein the pier unit comprises an inner pier (3), an outer pier (4), an inner pier foot guard (6) and an outer pier foot guard (8), the inner pier (3) being of an overall full-length hollow structure, the outer pier (4) being of an overall full-length hollow structure or an assembled hollow structure, the ratio of the outer diameter of the outer pier (4) to that of the inner pier (3) being 1.2-4.2, the ratio of the thickness of the inner pier (3) to that of the outer pier (4) being 1.5-4.5, at least one boss (7) being arranged on the upper part of the concrete base (9), the boss (7) being positioned inside the inner pier (3), the inner pier foot guard (6) being arranged between the inner pier (3) and the outer pier (4), the outer pier foot guard (8) being arranged outside the outer pier (4), and a separating ring-belt (5) being arranged above the inner pier foot guard (6) between the inner pier (3) and the outer pier (4).
2. The prefabricated high-strength concrete combined pier structure according to claim 1, characterized in that the upper part of the outer side of the inner pier (3) is provided with an inner tackifying key (12), and the inner tackifying key (12) is convex steel or convex-concave concrete thread; and/or an outer tackifying key (11) is arranged on the inner side of the outer pier (4), and the outer tackifying key (11) is convex steel or convex-concave concrete thread.
3. The prefabricated high-strength concrete combined pier structure according to claim 1, characterized in that the outer side of the inner pier (3) comprises an outer lower part connected with the inner pier foot guard (6) and an outer upper part not connected with the inner pier foot guard (6), wherein the outer lower part of the inner pier (3) is provided with a covering steel pipe (14), and the outer side of the covering steel pipe (14) is provided with a reinforcing rib (15), and a reinforcing cage is arranged at the inner pier foot guard (6) and the reinforcing rib (15) is of a convex steel structure arranged along the circumferential direction around the covering steel pipe (14), and the reinforcing rib (15) extends into the reinforcing cage in a staggered mode and then is fixedly connected with the reinforcing cage; and the outer side of the outer pier (4) comprises an outer lower part connected with the outer pier foot guard (8) and an outer upper part not connected with the outer pier foot guard (8), wherein a covering steel pipe (14) is arranged at the outer lower part of the outer pier (4), and a reinforcing rib (15) is arranged at the outer side of the covering steel pipe (14), and a reinforcing cage is arranged at the outer pier foot guard (8) and the reinforcing rib (15) is of a convex steel structure and arranged along the circumferential direction around the covering steel pipe (14), and the reinforcing rib (15) extends into the reinforcing cage in a staggered mode and is fixedly connected with the reinforcing cage.
4. The prefabricated high-strength concrete combined pier structure according to claim 3, characterized in that the reinforcing cage comprises a reinforcing framework cage and a stirrup, wherein the reinforcing framework cage comprises an outer reinforcing framework cage and an inner reinforcing framework cage, and the main reinforcement of the outer reinforcing framework cage is arranged at the inner side of the stirrup, and the main reinforcement of the inner reinforcing framework cage is arranged at the outer side of the stirrup.
5. The prefabricated high-strength concrete combined pier structure according to claim 1, characterized in that the pier comprises a plurality of pier units, namely the pier comprises an inner pier (3), a first middle pier, a second middle pier, a third middle pier.. .and an outer pier (4), wherein the inner pier foot guard(6) is arranged on lower sides between adjacent piers, and the separating ring-belt (5) is arranged on upper sides between adjacent piers.
6. The prefabricated high-strength concrete combined pier structure according to claim 1 or 5, characterized in that the separating ring-belt (5) is poured with cementitious material or discrete material, or a hollow may be reserved, or cementitious material may be cast only in a partial height range.
7. The prefabricated high-strength concrete combined pier structure according to claim 1, characterized in that the boss (7) and the foot guard part of the pier are arranged protruding out of the base (9), or the base (9) is provided with a groove (13) and the boss (7) and the foot guard part of the pier are arranged in the groove (13).
8. The prefabricated high-strength concrete combined pier structure according to claim 1, characterized in that a full-length rebar (2) is arranged inside both the inner pier (3) and the outer pier (4), wherein the length of the rebar (2) is greater than or equal to the length of the pier body, and when the length of the rebar (2) is greater than the length of the pier body, the upper end of the rebar (2) passes out from the upper part of the pier.
9. The prefabricated high-strength concrete combined pier structure according to claim 1, characterized in that when the outer pier (4) is of an assembled hollow structure, the outer pier (4) is formed by assembling at least two semicircles; and a connecting device is arranged between adjacent circular arcs.
10. A construction method of a prefabricated high-strength concrete combined pier structure, including concrete pile construction: adopting construction devices to carry out concrete pile construction;
concrete base construction: connecting a prefabricated concrete base with a concrete pile; and when a concrete base is prefabricated, it being possible that the concrete pile construction step and the concrete base construction step can be synchronously carried out;
inner pier construction: manufacturing a reinforcing cage on the outer side of a boss, and pouring concrete to form an inner pier foot guard after installing an inner pier on the outer side of the boss on the base, wherein the concrete strength grade of the inner pier foot guard is not lower than C50; and the inner pier being manufactured in a factory by adopting a prestress tension process and a centrifugal molding process, and the concrete strength grade of the pier body being higher than C60, and the tensioning force of the rebar of the inner pier being 0.65-0.75 times of the standard value of the tensile strength of the rebar;
outer pier construction: when an outer pier is an integral hollow pier, the outer pier being directly mounted on the outer side of the inner pier foot guard on the base; when the outer pier is of assembled type, the inner pier foot guard of each assembled ring being tightly abutted backward and then assembled into the integral outer pier; and the outer pier being manufactured in a factory by adopting a presttess tension process and a centrifugal molding process, and the concrete strength grade of the pier body being higher than C70, and the tensioning force of the rebar being 0.2-0.35 times of the standard value of the tensile strength of the rebar;
outer pier foot guard construction: performing foot guard construction on the bottom of the outer pier, wherein the concrete strength grade of the outer pier is not lower than C50; separating ring-belt construction: pouring concrete on the separating ring-belt between the inner pier and the outer pier, wherein the strength grade of the concrete is not lower than C50; and it being possible that the separating ring-belt and the inner pier foot guard can carry out integrated concrete pouring at the same time, wherein the concrete strength is not lower than C60;
and installing a top bent cap, and the construction of the combined pier structure being completed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910506171.4 | 2019-06-12 | ||
| CN201910506171.4A CN110205919B (en) | 2019-06-12 | 2019-06-12 | Prefabricated high-strength concrete combined pier structure and construction method thereof |
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| Publication Number | Publication Date |
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| AU2019101278A4 true AU2019101278A4 (en) | 2019-12-05 |
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| AU2019101278A Active AU2019101278A4 (en) | 2019-06-12 | 2019-10-22 | Prefabricated high-strength concrete combined pier structure and construction method thereof |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110205919B (en) |
| AU (1) | AU2019101278A4 (en) |
| WO (1) | WO2020248313A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3333788B2 (en) * | 1992-10-08 | 2002-10-15 | ケイコン株式会社 | Prefabricated bridge pier |
| JP6243366B2 (en) * | 2014-09-08 | 2017-12-06 | Ｊｆｅシビル株式会社 | Pier structure |
| CN104746422B (en) * | 2014-09-19 | 2016-06-08 | 杭州江润科技有限公司 | A kind of hollow pier stud delay-pour joint structure of bridge prefabrication 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 |
| CN105442433A (en) * | 2015-11-30 | 2016-03-30 | 中铁二十四局集团安徽工程有限公司 | Connection structure of prefabricated bridge pier and bearing platform and construction method thereof |
| 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 |
| CN108301317B (en) * | 2018-04-10 | 2023-11-17 | 大连理工大学 | Assembled pier structure and construction method thereof |
| 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 |
| 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 |
-
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
- 2019-10-22 AU AU2019101278A patent/AU2019101278A4/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110205919B (en) | 2024-06-07 |
| CN110205919A (en) | 2019-09-06 |
| WO2020248313A1 (en) | 2020-12-17 |
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