CN113235401A - Prefabricated pier column and bearing platform connecting structure capable of adjusting wet joint mode and construction method - Google Patents

Prefabricated pier column and bearing platform connecting structure capable of adjusting wet joint mode and construction method Download PDF

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Publication number
CN113235401A
CN113235401A CN202110648767.5A CN202110648767A CN113235401A CN 113235401 A CN113235401 A CN 113235401A CN 202110648767 A CN202110648767 A CN 202110648767A CN 113235401 A CN113235401 A CN 113235401A
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China
Prior art keywords
bearing platform
prefabricated
pier
prefabricated pier
embedded
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CN202110648767.5A
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Inventor
黄振宇
刘培雷
张晓春
黎木平
贾小飞
覃国添
王元
钟勇
白莲森
欧阳硕
陈泉宏
樊纪奎
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Shenzhen Urban Transport Planning Center Co Ltd
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Shenzhen Urban Transport Planning Center Co Ltd
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Priority to CN202110648767.5A priority Critical patent/CN113235401A/en
Publication of CN113235401A publication Critical patent/CN113235401A/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/10Deep foundations
    • E02D27/12Pile foundations
    • E02D27/14Pile framings, i.e. piles assembled to form the substructure

Abstract

A prefabricated pier column and bearing platform connecting structure capable of adjusting a wet joint mode and a construction method belong to the technical field of bridge engineering. The purpose is in prefabricated pier stud and the aspect of cushion cap connection, solves a great deal of inconvenience that urban bridge tradition construction technology brought. The technical points are as follows: the invention improves and innovates the traditional wet joint connection form, the post-cast section is arranged below the ground and at the root part of the pier stud, and the temporary support system and the verticality adjusting system are additionally arranged. Compared with the traditional process for connecting the bridge pier stud and the bearing platform, the process has the advantages of high installation precision, simplicity and convenience in perpendicularity adjustment, short time for hoisting equipment, reliability in connection, hidden appearance of the connection position, no need of independent formwork erection or support erection on the ground of a construction site, small occupied area and the like.

Description

Prefabricated pier column and bearing platform connecting structure capable of adjusting wet joint mode and construction method
Technical Field
The invention relates to a prefabricated pier stud and bearing platform connecting structure and a construction method, in particular to a prefabricated pier stud and bearing platform connecting structure capable of adjusting a wet joint mode and a construction method, and belongs to the technical field of bridge engineering.
Background
At present, urban bridge construction conditions in China still mainly adopt cast-in-place and manually bound substructure, and disadvantages existing in the construction are gradually revealed, such as long construction time and overlarge labor force demand, which not only affect road traffic, but also affect society to a certain extent, such as noise, dust, light and the like, which all interfere with the environment to a large extent, so that the urban bridge construction conditions cannot meet the civilized construction standards. In addition, extensive construction causes the whole industry to have higher energy consumption, applies greater pressure to cities, and properly solves the problems. Along with the development of cities, the assembly construction of urban bridges is imperative.
At present, the connection treatment of the prefabricated bridge pier and the bearing platform mainly comprises the following ideas: (1) and connecting the grouting sleeve. The bearing platform extends out of the steel bar, the sleeve is pre-embedded at the bottom of the prefabricated bridge pier, the high-strength non-shrinkage cement grouting material is filled in a gap between the steel bar and the connecting sleeve, a joint is formed after hardening, and a mortar cushion layer or an epoxy connecting agent is adopted on the contact surface of the bridge pier and the bearing platform. (2) And (4) connecting in a prestressed mode. The prestressed tendons are embedded in the bearing platform, the bridge pier penetrates through the prestressed tendons extending out of the bearing platform during hoisting, and the prestressed force is tensioned at the bridge pier section or the bridge pier top (cover beam top), so that the connection between the prefabricated bridge pier and the bearing platform is realized. The joint surface of the pier and the bearing platform adopts a joint epoxy glue or mortar cushion layer. (3) And (4) socket connection. The socket joint type connection is characterized in that a pier body is inserted into a reserved hole of a bearing platform, the length of the pier body is usually 1.2-1.5 times of the pier body cross section, mortar is laid at the bottom of the pier body, and concrete (semi-dry hard) is used for filling the periphery of the pier body. (4) Wet seam joining. The wet joint connection mainly embodies that connecting steel bars are reserved for the bearing platform and the pier during prefabrication, temporary supports and templates are arranged among the components, the components extend out of the steel bars to be mutually lapped, and the connection is formed through pouring post-pouring sections.
The four connection processing methods of the prefabricated bridge pier and the bearing platform respectively have the following problems:
(1) the method is suitable for large-scale piers of the same type, such as urban viaducts and the like, and the structure of the method is mainly characterized in that the method has higher requirements on construction precision, the field construction period is short, the workload is smaller, but the anti-seismic capacity of the method still needs to be further researched, the fault-tolerant rate of a construction field is small, and the construction precision is higher.
(2) The prestressed reinforcing steel is generally finish-rolled deformed steel bar. The connection is widely applied to actual engineering, and the construction technology, design and computational analysis are mature. But the pier body has high cost, complex process and long period.
(3) The socket joint type connection has the advantages of simple process and less workload, and has the defects of insufficient mechanical behavior, incapability of continuously bearing the top layer stressed steel bars of the bearing platform and still needing to research the shock resistance.
(4) The structure is mainly suitable for large-tonnage piers such as a cross-sea bridge and the like, the mechanical property of the structure is similar to that of a traditional cast-in-place concrete mode, the principle is simple, and the wet joint structure is also a design idea which is frequently used in China at present. However, the wet joint needs to be provided with a bracket and a template, the construction period is prolonged, the workload is increased, and the structure has defects in view of the construction speed.
Disclosure of Invention
In view of the facts, the invention aims to solve the inconvenience brought by the traditional construction process of the urban bridge and realize the full-prefabricated construction of the urban bridge, and provides a novel connection structure and a construction method of the prefabricated pier column and the bearing platform, which adopt an adjustable wet joint form, on the basis of the existing connection mode of the prefabricated pier column and the bearing platform.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first scheme is as follows: a prefabricated pier column and bearing platform connecting structure capable of adjusting a wet joint mode comprises a bearing platform, connecting steel bars are embedded in the bearing platform, connecting stirrups are embedded in the bearing platform, a prefabricated pier, prefabricated pier column main reinforcements, connecting stirrups, a post-pouring pier head, a temporary support and a jack;
the bearing platform is a cast-in-place bearing platform, embedded connecting steel bars of the bearing platform, embedded connecting stirrups in the bearing platform and temporary supports are embedded at positions corresponding to the prefabricated bridge piers, and the embedded connecting steel bars of the bearing platform extend out of the bearing platform;
the prefabricated pier is a factory prefabricated component, a prefabricated pier column main rib is embedded, the prefabricated pier column main rib extends outwards to form the prefabricated pier, and the connecting stirrups are fixed on the prefabricated pier column main rib;
the jacks are arranged at the inclined positions of the bottom surfaces of the prefabricated piers in pairs and used for adjusting the verticality of the prefabricated piers;
the bearing platform embedded connecting steel bars and the prefabricated pier column main steel bars are welded together;
the post-cast pier head is poured at the joint of the prefabricated pier and the bearing platform, the post-cast pier head is specifically poured below the ground, the plane size of the post-cast pier head is wider than that of the prefabricated pier, and the post-cast pier head is wrapped into the prefabricated pier.
Further: the specification quantity of the embedded connecting steel bars of the bearing platform is adapted to the main steel bars of the prefabricated pier stud.
Further: the embedded depth length and the extended length of the embedded connecting steel bar of the bearing platform in the bearing platform meet the requirement of anchoring length.
Further: the distance between the embedded connecting stirrups in the bearing platform is 8 cm.
Further: the temporary support is a steel component, and a layer of rubber cushion block is arranged on the top surface of the temporary support. So set up, possess anti-skidding effect.
Further: the distance between the pier bottom of the prefabricated pier and the top surface of the bearing platform is 70-80 cm.
Further: the prefabricated pier stud main rib extends outwards at the bottom of the prefabricated pier to meet the requirement of anchoring length.
Further: the distance between the connecting stirrups is 8 cm.
Further: the post-cast pier head is poured by fine aggregate concrete or UHPC and is positioned below the ground, the post-cast pier head is rectangular or circular, the plane size of the post-cast pier head is 10-15 cm wider than the single-side size of the prefabricated pier, and the post-cast fine aggregate concrete or UHPC is wrapped in the prefabricated pier by 10-15 cm.
Further: the jack is numerical control hydraulic jack, and it sets up in prefabricated pier bottom slope department in pairs, and the jack is 10 ~ 15cm with the marginal distance of prefabricated pier, and the jack is located between the adjacent prefabricated pier column owner muscle. In addition, the jack can be used circularly.
Further: the top surface of the bearing platform is flat.
In summary, the invention is improved on the basis of the traditional wet joint form, connecting steel bars respectively extend out of the top of a bearing platform and the bottom of a prefabricated pier, a post-cast section, a temporary supporting system and a verticality adjusting system are arranged at the bottom of the prefabricated pier, the bearing platform and the connecting steel bars extending out of the prefabricated pier are connected through welding and pouring the post-cast section of the pier, and the post-cast section is positioned below the ground.
Scheme II: a construction method for a prefabricated pier column and bearing platform connecting structure capable of adjusting a wet joint mode comprises the following specific steps:
step one, constructing a bridge pile foundation and a cushion layer of a bearing platform;
secondly, casting a bearing platform in situ, embedding connecting steel bars in the embedded bearing platform, embedding connecting stirrups in the bearing platform and temporarily supporting;
step three, the prefabricated bridge piers are factory prefabricated components, the prefabricated bridge piers are hoisted and placed on the temporary supports, and the verticality of the prefabricated bridge piers is measured;
fourthly, placing a jack at the bottom of the prefabricated bridge pier in the inclined direction of the prefabricated bridge pier, and adjusting the verticality of the prefabricated bridge pier to meet the requirement;
fifthly, welding embedded connecting steel bars of the bearing platform and prefabricated pier stud main bars, and removing the temporary supports and the jacks;
sixthly, pouring and maintaining the post-pouring pier head by using fine aggregate concrete or UHPC;
and step seven, completing the connection of the prefabricated bridge pier and the bearing platform.
Further, in the second step, the top surface of the bearing platform is processed to be smooth.
Further: in the second step, the embedded depth length and the extending length of the pre-buried connecting steel bars of the bearing platform in the bearing platform meet the requirement of anchoring length; the distance between the embedded connecting stirrups in the bearing platform is 8 cm.
Further: in the second step, the temporary support is made of steel members, and a layer of rubber cushion block is arranged on the top surface of the temporary support.
Further: in the third step, the distance between the pier bottom of the prefabricated pier and the top surface of the bearing platform is 70-80 cm.
Further: in the fourth step, the jacks are numerical control hydraulic jacks and are arranged at the inclined positions of the bottoms of the prefabricated piers in pairs, the edge distance between each jack and each prefabricated pier is 10-15 cm, and the jacks are located between the main ribs of the adjacent prefabricated piers. In addition, the jack can be used circularly.
Further: in the sixth step, the post-cast pier head is cast by fine aggregate concrete or UHPC and is positioned below the ground, the post-cast pier head is rectangular or circular, the plane size of the post-cast pier head is 10-15 cm wider than the single-side size of the prefabricated pier, and the post-cast fine aggregate concrete or UHPC is wrapped into the prefabricated pier by 10-15 cm.
The invention achieves the following effects:
the invention improves the traditional wet joint form and can better control the installation precision of the prefabricated pier stud. Compared with the traditional bridge construction process, the method has the advantages of simple principle, reliable connection, no need of independent formwork erection and support erection on the ground of a construction site, small occupied area, convenience in adjustment, short time for occupying hoisting equipment, high installation precision and the like.
Drawings
FIG. 1 is a schematic structural view of a prefabricated pier stud and bearing platform connection structure with an adjustable wet joint mode according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic diagram of the jack arrangement position of the present invention.
Wherein:
1-bearing platform, 2-bearing platform embedded connecting steel bars, 3-bearing platform embedded connecting stirrups, 4-prefabricated bridge pier, 5-prefabricated pier column main reinforcements, 6-connecting stirrups, 7-post-pouring pier heads, 8-temporary supports and 9-jacks.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Preferred embodiments of the present invention are explained in detail below with reference to the accompanying drawings.
Example 1: referring to fig. 1-3, the prefabricated pier stud and bearing platform connection structure with the adjustable wet joint mode according to the embodiment includes a bearing platform 1, a bearing platform embedded connecting steel bar 2, a connecting stirrup 3 embedded in the bearing platform, a prefabricated pier 4, a prefabricated pier stud main bar 5, a connecting stirrup 6, a post-pouring pier head 7, a temporary support 8 and a jack 9;
the bearing platform 1 is a cast-in-place bearing platform, bearing platform embedded connecting steel bars 2 are embedded in positions corresponding to the prefabricated bridge piers 4, bearing platform embedded connecting stirrups 3 and temporary supports 8 are embedded in the bearing platform, the bearing platform embedded connecting stirrups 3 are fixed on the embedded bearing platform embedded connecting steel bars 2, the distance between the embedded connecting stirrups 3 in the bearing platform is 8cm, the bearing platform embedded connecting steel bars 2 extend out of the bearing platform 1, the temporary supports 8 are steel members, and the top surfaces of the temporary supports are provided with a layer of rubber cushion blocks; the prefabricated pier 4 is a factory prefabricated component, the distance from the bottom of the prefabricated pier 4 to the top surface of the bearing platform 1 is 70cm, prefabricated pier column main ribs 5 are embedded, the prefabricated pier column main ribs 5 extend out of the prefabricated pier 4, connecting stirrups 6 are fixed on the prefabricated pier column main ribs 5, and the distance between the connecting stirrups 6 is 8 cm;
the specification number of the bearing platform embedded connecting steel bars 2 is adapted to that of the prefabricated pier column main steel bars 5; the embedded depth length and the extending length of the bearing platform embedded connecting steel bar 2 in the bearing platform 1 meet the requirement of anchoring length; the overhanging length of the prefabricated pier stud main rib 5 at the bottom of the prefabricated pier 4 meets the requirement of anchoring length; the bearing platform embedded connecting steel bar 2 and the prefabricated pier stud main bar 5 are welded together;
the jacks 9 are numerical control hydraulic jacks and are arranged at the bottom inclined positions of the prefabricated piers 4 in pairs, the distance between each jack 9 and the edge of each prefabricated pier 4 is 10cm, the jacks 9 are located between the adjacent prefabricated pier column main ribs 5, and the jacks 9 are used for adjusting the verticality of the prefabricated piers 4;
the post-cast pier head 7 is positioned below the ground by adopting fine stone concrete in a pouring mode, is rectangular, and is 10cm wider than the single side of the prefabricated pier 4 in plane size, and the post-cast fine stone concrete is wrapped into the prefabricated pier by 10 cm.
Example 2: referring to fig. 1-3, the prefabricated pier stud and bearing platform connection structure with the adjustable wet joint mode according to the embodiment includes a bearing platform 1, a bearing platform embedded connecting steel bar 2, a connecting stirrup 3 embedded in the bearing platform, a prefabricated pier 4, a prefabricated pier stud main bar 5, a connecting stirrup 6, a post-pouring pier head 7, a temporary support 8 and a jack 9;
the bearing platform 1 is a cast-in-place bearing platform, the embedded connecting steel bars 2 of the bearing platform, the embedded connecting stirrups 3 in the bearing platform and the temporary supports 8 are embedded in the positions corresponding to the prefabricated piers 4, the embedded connecting stirrups 3 in the bearing platform are fixed on the embedded connecting steel bars 2 of the bearing platform, the distance between the embedded connecting stirrups 3 in the bearing platform is 8cm, the embedded connecting steel bars 2 of the bearing platform extend out of the bearing platform 1, the temporary supports 8 are steel members, and the top surfaces of the temporary supports are provided with a layer of rubber cushion blocks; the prefabricated pier 4 is a factory prefabricated component, the distance from the bottom of the prefabricated pier 4 to the top surface of the bearing platform 1 is 80cm, prefabricated pier column main ribs 5 are embedded, the prefabricated pier column main ribs 5 extend out of the prefabricated pier 4, connecting stirrups 6 are fixed on the prefabricated pier column main ribs 5, and the distance between the connecting stirrups 6 is 8 cm;
the specification number of the bearing platform embedded connecting steel bars 2 is adapted to that of the prefabricated pier column main steel bars 5; the embedded depth length and the extending length of the bearing platform embedded connecting steel bar 2 in the bearing platform 1 meet the requirement of anchoring length; the overhanging length of the prefabricated pier stud main rib 5 at the bottom of the prefabricated pier 4 meets the requirement of anchoring length; the bearing platform embedded connecting steel bar 2 and the prefabricated pier stud main bar 5 are welded together;
the jacks 9 are numerical control hydraulic jacks and are arranged at the bottom inclined positions of the prefabricated piers 4 in pairs, the distance between the jacks 9 and the edges of the prefabricated piers 4 is 15cm, the jacks 9 are positioned between the adjacent prefabricated pier column main ribs 5, and the jacks 9 are used for adjusting the verticality of the prefabricated piers 4;
the post-cast pier head 7 is positioned below the ground by UHPC pouring, is circular in shape, has the plane size which is 15cm wider than the single-side size of the prefabricated pier 4, and is wrapped by the post-cast UHPC by 15 cm.
Example 3: referring to fig. 1 to 3, the construction method of the prefabricated pier stud and bearing platform connection structure with the adjustable wet joint mode according to the embodiment includes the following specific steps:
step one, constructing a bridge pile foundation and a cushion layer of a bearing platform;
secondly, casting a bearing platform 1 in situ, embedding connecting steel bars 2 in the embedded bearing platform, embedding connecting stirrups 3 in the bearing platform and temporarily supporting 8;
wherein: the top surface of the bearing platform is processed to be smooth, and the embedded depth length and the extended length of the embedded connecting steel bar 2 of the bearing platform in the bearing platform 1 meet the requirement of anchoring length; the distance between the embedded connecting stirrups 3 in the bearing platform is 8 cm; the temporary support 8 is made of a steel member, and a layer of rubber cushion block is arranged on the top surface of the temporary support;
step three, the prefabricated bridge pier 4 is a factory prefabricated component, the prefabricated bridge pier 4 is hoisted and placed on the temporary support 8, and the verticality of the prefabricated bridge pier is measured;
wherein: the distance from the bottom of the prefabricated pier 4 to the top surface of the bearing platform 1 is 70 cm;
fourthly, placing a jack 9 at the bottom of the prefabricated pier 4 in the inclined direction of the prefabricated pier, and adjusting the verticality of the prefabricated pier 4 to meet the requirement;
wherein: the jacks 9 are numerical control hydraulic jacks and are arranged at the bottom inclined positions of the prefabricated pier 4 in pairs, the distance between the jacks 9 and the edge of the prefabricated pier 4 is 10cm, and the jacks 9 are positioned between the adjacent prefabricated pier column main ribs 5;
fifthly, welding the embedded connecting steel bars 2 of the bearing platform and the prefabricated pier stud main bars 5, and removing the temporary supports 8 and the jacks 9;
pouring and post-pouring the pier heads 7 by using fine stone concrete and maintaining;
wherein: the post-cast pier head 7 is poured by fine stone concrete and is positioned below the ground, the shape of the post-cast pier head is rectangular, the plane size of the post-cast pier head is 10cm wider than the single-side size of the prefabricated pier 4, and the post-cast fine stone concrete is wrapped into the prefabricated pier by 10 cm;
and step seven, completing the connection of the prefabricated bridge pier 4 and the bearing platform 1.
Example 4: referring to fig. 1 to 3, the construction method of the prefabricated pier stud and bearing platform connection structure with the adjustable wet joint mode according to the embodiment includes the following specific steps:
step one, constructing a bridge pile foundation and a cushion layer of a bearing platform;
secondly, casting a bearing platform 1 in situ, embedding connecting steel bars 2 in the embedded bearing platform, embedding connecting stirrups 3 in the bearing platform and temporarily supporting 8;
wherein: the top surface of the bearing platform is processed to be smooth, and the embedded depth length and the extended length of the embedded connecting steel bar 2 of the bearing platform in the bearing platform 1 meet the requirement of anchoring length; the distance between the embedded connecting stirrups 3 in the bearing platform is 8 cm; the temporary support 8 is made of a steel member, and a layer of rubber cushion block is arranged on the top surface of the temporary support;
step three, the prefabricated bridge pier 4 is a factory prefabricated component, the prefabricated bridge pier 4 is hoisted and placed on the temporary support 8, and the verticality of the prefabricated bridge pier is measured;
wherein: the distance from the bottom of the prefabricated pier 4 to the top surface of the bearing platform 1 is 80 cm;
fourthly, placing a jack 9 at the bottom of the prefabricated pier 4 in the inclined direction of the prefabricated pier, and adjusting the verticality of the prefabricated pier 4 to meet the requirement;
wherein: the jacks 9 are numerical control hydraulic jacks and are arranged at the bottom inclined positions of the prefabricated pier 4 in pairs, the distance between the jacks 9 and the edge of the prefabricated pier 4 is 15cm, and the jacks 9 are positioned between the adjacent prefabricated pier column main ribs 5;
fifthly, welding the embedded connecting steel bars 2 of the bearing platform and the prefabricated pier stud main bars 5, and removing the temporary supports 8 and the jacks 9;
sixthly, pouring and maintaining the post-pouring pier head 7 by using UHPC;
wherein: the post-cast pier head 7 is poured by UHPC and is positioned below the ground, the shape of the post-cast pier head is circular, the plane size of the post-cast pier head is 15cm wider than the single-side size of the prefabricated pier 4, and the post-cast UHPC is wrapped into the prefabricated pier by 15 cm;
and step seven, completing the connection of the prefabricated bridge pier 4 and the bearing platform 1.
The above examples have the following effects compared to the existing wet seam joining technique (see table 1):
table 1 is an effect comparison table
Figure BDA0003110962790000071
The above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The utility model provides a prefabricated pier stud and cushion cap joint construction of adjustable wet seam mode which characterized in that: the device comprises a bearing platform (1), connecting steel bars (2) are embedded in the bearing platform, connecting stirrups (3) are embedded in the bearing platform, a prefabricated pier (4), prefabricated pier column main reinforcements (5), connecting stirrups (6), a post-pouring pier head (7), a temporary support (8) and a jack (9);
the bearing platform (1) is a cast-in-place bearing platform, the embedded connecting steel bars (2) of the bearing platform, the embedded connecting stirrups (3) in the bearing platform and the temporary supports (8) are embedded at the positions corresponding to the prefabricated bridge piers (4), and the embedded connecting steel bars (2) of the bearing platform extend out of the top of the bearing platform (1);
the prefabricated pier (4) is a factory prefabricated component, a prefabricated pier column main rib (5) is embedded, the prefabricated pier column main rib (5) extends out of the prefabricated pier (4), and a connecting stirrup (6) is fixed on the prefabricated pier column main rib (5);
the jacks (9) are arranged at the inclined positions of the bottom surfaces of the prefabricated piers (4) in pairs and are used for adjusting the verticality of the prefabricated piers (4);
the bearing platform embedded connecting steel bars (2) are welded and connected with the prefabricated pier stud main steel bars (5);
the post-cast pier head (7) is poured at the joint of the prefabricated pier (4) and the bearing platform (1), the post-cast pier head is specifically poured below the ground, the plane size of the post-cast pier head (7) is wider than that of the prefabricated pier (4), and the post-cast pier head (7) wraps the prefabricated pier (4).
2. The adjustable wet-joint prefabricated pier column and bearing platform connecting structure according to claim 1, wherein: the specification number of the embedded connecting steel bars (2) of the bearing platform is adapted to the specification number of the main steel bars (5) of the prefabricated pier column; the embedded depth length and the extending length of the bearing platform embedded connecting steel bar (2) in the bearing platform (1) meet the requirement of the anchoring length specified by a specification; the overhanging length of the prefabricated pier column main rib (5) at the bottom of the prefabricated pier (4) should meet the requirement of the anchoring length specified by the specification.
3. The adjustable wet-joint prefabricated pier column and bearing platform connecting structure according to claim 1, wherein: the distance between the embedded connecting stirrups (3) in the bearing platform is 8 cm; the distance between the connecting stirrups (6) is 8cm, and the distance from the bottom of the prefabricated pier (4) to the top surface of the bearing platform (1) is 70-80 cm.
4. The adjustable wet-joint prefabricated pier column and bearing platform connecting structure according to claim 1, wherein: the temporary support (8) is a steel component, and a layer of rubber cushion block is arranged on the top surface of the temporary support.
5. The adjustable wet-joint prefabricated pier column and bearing platform connection structure of claim 1, 2, 3 or 4, wherein: the post-cast pier head (7) is poured below the ground by fine aggregate concrete or UHPC, is rectangular or circular, is 10-15 cm wider than the single side of the prefabricated pier (4) in plane size, and is 10-15 cm wrapped in the post-cast fine aggregate concrete or UHPC.
6. The adjustable wet-joint prefabricated pier column and bearing platform connection structure of claim 5, wherein: jack (9) are numerical control hydraulic jack, and it sets up in prefabricated pier (4) bottom slope department in pairs, and jack (9) are 10 ~ 15cm with the marginal distance of prefabricated pier (4), and jack (9) are located between adjacent prefabricated pier column owner muscle (5).
7. A construction method for a prefabricated pier column and bearing platform connecting structure capable of adjusting a wet joint mode is characterized by comprising the following specific steps:
step one, constructing a bridge pile foundation and a cushion layer of a bearing platform;
step two, pouring a bearing platform (1) in situ, embedding connecting steel bars (2) in the embedded bearing platform, embedding connecting stirrups (3) in the bearing platform and temporarily supporting (8);
step three, the prefabricated bridge piers (4) are factory prefabricated components, the prefabricated bridge piers (4) are hoisted and placed on the temporary supports (8), and the verticality of the prefabricated bridge piers is measured;
fourthly, placing a jack (9) at the bottom of the prefabricated pier (4) in the inclined direction of the prefabricated pier, and adjusting the verticality of the prefabricated pier (4) to meet the requirement;
fifthly, welding the embedded steel bars (2) of the bearing platform and the prefabricated pier stud main bars (5), and removing the temporary supports (8) and the jacks (9);
sixthly, pouring and maintaining the post-pouring pier head (7) by using fine aggregate concrete or UHPC;
and seventhly, completing the connection between the prefabricated pier (4) and the bearing platform (1).
8. The construction method of the adjustable wet joint type prefabricated pier stud and bearing platform connection structure according to claim 7, wherein: in the second step, the top surface of the bearing platform is processed to be smooth, and the embedded depth length and the extending length of the embedded steel bars (2) of the bearing platform in the bearing platform (1) meet the requirement of anchoring length; the distance between the connecting stirrups (3) embedded in the bearing platform is 8 cm; the temporary support (8) is made of a steel component, and the top surface of the temporary support is provided with a layer of rubber cushion block; in the third step, the distance from the bottom of the prefabricated bridge pier (4) to the top surface of the bearing platform (1) is 70-80 cm.
9. The construction method of the adjustable wet joint type prefabricated pier stud and bearing platform connection structure according to claim 8, wherein: in the fourth step, the jacks (9) are numerical control hydraulic jacks and are arranged at the inclined positions of the bottoms of the prefabricated piers (4) in pairs, the edge distance between each jack (9) and the corresponding prefabricated pier (4) is 10-15 cm, and the jacks (9) are located between the main ribs (5) of the adjacent prefabricated piers.
10. The method for constructing an adjustable wet joint type precast pier stud and cap construction according to claim 7, 8 or 9, wherein: in the sixth step, the post-cast pier head (7) is cast by fine aggregate concrete or UHPC and is positioned below the ground, the post-cast pier head is rectangular or circular, the plane size of the post-cast pier head is 10-15 cm wider than the single-side size of the prefabricated pier (4), and the post-cast fine aggregate concrete or UHPC is wrapped into the prefabricated pier by 10-15 cm.
CN202110648767.5A 2021-06-10 2021-06-10 Prefabricated pier column and bearing platform connecting structure capable of adjusting wet joint mode and construction method Pending CN113235401A (en)

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Publication number Priority date Publication date Assignee Title
KR20030059736A (en) * 2002-01-04 2003-07-10 근형기업 주식회사 Method of Construction of Concrete Structure For use Fiber-Reinforced Resin Fire Retardant Pannel
CN107100078A (en) * 2017-05-19 2017-08-29 中国五冶集团有限公司 A kind of packaged type bridges Precast Pier Columns component installation method
CN109267473A (en) * 2018-10-26 2019-01-25 中铁大桥局集团有限公司 Connect the wet seam component of cushion cap and precast bridge pier shaft
CN110725195A (en) * 2019-11-20 2020-01-24 华南理工大学 Connecting method for assembly type pier and bearing platform anchoring steel bar sleeve-insertion post-cast RPC and application thereof
CN112681117A (en) * 2020-12-24 2021-04-20 中国二十冶集团有限公司 Connecting device and construction method for connecting part of bridge pier column and bearing platform

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030059736A (en) * 2002-01-04 2003-07-10 근형기업 주식회사 Method of Construction of Concrete Structure For use Fiber-Reinforced Resin Fire Retardant Pannel
CN107100078A (en) * 2017-05-19 2017-08-29 中国五冶集团有限公司 A kind of packaged type bridges Precast Pier Columns component installation method
CN109267473A (en) * 2018-10-26 2019-01-25 中铁大桥局集团有限公司 Connect the wet seam component of cushion cap and precast bridge pier shaft
CN110725195A (en) * 2019-11-20 2020-01-24 华南理工大学 Connecting method for assembly type pier and bearing platform anchoring steel bar sleeve-insertion post-cast RPC and application thereof
CN112681117A (en) * 2020-12-24 2021-04-20 中国二十冶集团有限公司 Connecting device and construction method for connecting part of bridge pier column and bearing platform

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Application publication date: 20210810