CN111749133A - Beam-arch combined rigid frame bridge and construction method of bridge pier thereof - Google Patents

Beam-arch combined rigid frame bridge and construction method of bridge pier thereof Download PDF

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Publication number
CN111749133A
CN111749133A CN202010466768.3A CN202010466768A CN111749133A CN 111749133 A CN111749133 A CN 111749133A CN 202010466768 A CN202010466768 A CN 202010466768A CN 111749133 A CN111749133 A CN 111749133A
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CN
China
Prior art keywords
pier body
cover plate
bridge
hollow
pier
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Pending
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CN202010466768.3A
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Chinese (zh)
Inventor
杨培诚
王蓬
石晓飞
张斌
张彪
李涛
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China Construction Tunnel Construction Co Ltd
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China Construction Tunnel Construction Co Ltd
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Publication date
Application filed by China Construction Tunnel Construction Co Ltd filed Critical China Construction Tunnel Construction Co Ltd
Priority to CN202010466768.3A priority Critical patent/CN111749133A/en
Publication of CN111749133A publication Critical patent/CN111749133A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • E01D4/00Arch-type bridges

Abstract

The invention belongs to the technical field of bridge construction, and particularly relates to a beam-arch combined rigid frame bridge. This rigid frame bridge includes: pile foundations; the bearing platform is poured on the pile foundation; the bridge comprises bridge piers and bearing platforms, wherein the bridge piers and the bearing platforms are correspondingly arranged, a plurality of bridge piers are arranged at intervals along the bridge direction, and the bridge piers are arranged on the corresponding bearing platforms; the beam body is supported by a plurality of piers; one end of the lower chord supporting beam is connected to the bridge piers, the other end of the lower chord supporting beam is connected to the bottom of the beam body, the lower chord supporting beam is located between two adjacent bridge piers, and the bottom edge line of the lower chord supporting beam changes according to 2.2 times of parabolic law. The invention is a novel combined structure system with definite structure stress and beautiful appearance.

Description

Beam-arch combined rigid frame bridge and construction method of bridge pier thereof
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a beam-arch combined rigid frame bridge and a construction method of a bridge pier of the beam-arch combined rigid frame bridge.
Background
In mountain expressway and mountain city, in order to stride across valley, river, mostly adopt prestressed concrete continuous rigid frame bridge, this kind of steel structure bridge concreties pier shaft and girder and becomes an organic whole, and pier shaft and girder form rigid frame, bear superstructure's load, and on the one hand the girder atress is reasonable, and on the other hand pier shaft has given full play to the latent energy structurally.
The continuous rigid frame bridge is a structural system commonly used in the construction of large-span bridges, and the common span of the continuous rigid frame bridge is 100-300 meters. For the large-span continuous rigid frame bridges (particularly the large-span continuous rigid frame bridges with the length of 250-350 m), the defects of midspan downwarping, web cracking and the like generally exist, and the normal operation of the bridges is influenced because the maintenance is required regularly.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a beam-arch combined rigid frame bridge and a construction method of a bridge pier thereof, so that the defects of midspan downwarping, web cracking and the like of a large-span continuous rigid frame bridge are reduced, and the influence on the normal operation of the bridge is avoided.
The invention realizes the purpose through the following technical scheme:
a bridge-arch composite rigid frame bridge, comprising:
pile foundations;
the bearing platform is poured on the pile foundation;
the bridge pier and the bearing platform are correspondingly arranged, a plurality of bridge piers are arranged at intervals along the bridge direction, and the bridge piers are arranged on the corresponding bearing platform;
the beam body is supported by a plurality of piers;
one end of the lower chord supporting beam is connected to the bridge piers, the other end of the lower chord supporting beam is connected to the bottom of the beam body, the lower chord supporting beam is located between the two adjacent bridge piers, and the bottom edge line of the lower chord supporting beam changes according to 2.2 times of parabolic rules.
Further, the vector-span ratio of the lower-chord support beam is 1/7.77-1/5.
Optionally, two lower chord supporting beams are arranged between two adjacent piers, the two lower chord supporting beams are arranged oppositely, and the other ends of the two lower chord supporting beams are in butt joint.
Optionally, one of the lower chord supporting beams is arranged between two adjacent piers, one end of the lower chord supporting beam is arranged on one of the two adjacent piers, and the other end of the lower chord supporting beam is arranged in the middle of the beam body between the two adjacent piers.
Further, the pier body of pier includes from the hollow section pier body and the solid section pier body of pouring in proper order down.
A construction method of a bridge pier of a beam-arch combined rigid frame bridge comprises the following steps:
pouring a hollow section pier body;
after the hollow section pier body is poured, installing an external side template of the solid section pier body on the top of the hollow section pier body;
hoisting the cover plate of the solid section pier body to the bin top hole at the top of the hollow section pier body;
and (4) finishing pouring of the solid section pier body by utilizing the side template and the cover plate of the solid section pier body.
Further, pour hollow section pier shaft, specifically include:
sequentially pouring each hollow bin of the hollow section pier body;
when the last hollow bin at the top of the hollow section pier body is poured, after the concrete strength of the last hollow bin at the top of the hollow section pier body reaches 80%, the external side template of the last hollow bin and the internal side templates of the last hollow bin and the last hollow bin are sequentially detached.
Further, install the outside side template of solid section pier shaft at hollow section pier shaft top, specifically include:
and lifting and installing the outer side template of the hollow section pier body to the outer side template on the last hollow bin at the top of the hollow section pier body.
Further, on the apron hoist and mount of solid section pier shaft to the storehouse top entrance to a cave at hollow section pier shaft top, specifically include:
the cover plate is prefabricated, the cover plate comprises two concrete prefabricated plates, the concrete prefabricated plates adopt single-layer steel bar meshes, the reinforcing bars of the concrete prefabricated plates are single-layer reinforcing bars in the longitudinal and transverse directions, and two hanging rings are embedded in the middle of the long edges of the two sides of the cover plate;
embedding four positioning reinforcing steel bar heads at the contact part of the opening edge of the last hollow bin at the top of the hollow section pier body and the cover plate, wherein the four positioning reinforcing steel bar heads are respectively arranged in the middle of the side edge of the opening edge of the last hollow bin at the top of the hollow section pier body, and precisely releasing the contour line of the cover plate on the top surface of the last hollow bin at the top of the hollow pier body by taking the center line of a pier as the center;
before the cover plate is hoisted, carrying out concrete strength resilience detection on the cover plate to ensure that the concrete strength of the cover plate reaches more than 80% of the design strength;
correspondingly hanging one ends of four equal-length steel wire ropes on hanging rings respectively, correspondingly hanging the other ends of the four equal-length steel wire ropes on a hanging hook of hoisting equipment respectively, and starting to hoist the cover plate when the hoisting equipment works;
when the cover plate is lifted in place, the edge of the cover plate is accurately aligned according to the contour line, so that the distances between the four edges of the cover plate and the contact surface of the top pier of the last hollow bin at the top of the hollow pier body are consistent;
and after the cover plate is hoisted, mortar is smeared at the joint positions of the cover plate and the outer side template of the solid section pier body to seal the joint.
Further, utilize the side form board and the apron of solid section pier shaft, accomplish the pouring of solid section pier shaft, specifically include:
binding the reinforcing steel bars at the solid section of the pier top: installing main ribs on the inner side of a side template of the solid section pier body, wherein the main ribs are divided into a first main rib group connected with the side edge of the last hollow bin at the top of the hollow section pier body and a second main rib group installed at the top of the cover plate; installing a plurality of annular horizontal ribs on the inner side of a side template of the solid section pier body, wherein the plurality of annular horizontal ribs are sequentially arranged from bottom to top and from outside to inside; installing drag hook reinforcing steel bars on the inner sides of the side templates of the solid pier bodies, and arranging the drag hook reinforcing steel bars between the adjacent main reinforcing steel bars along the bridge direction;
pouring concrete: performing chiseling cleaning treatment on a concrete joint surface on the inner side of a side template of the solid section pier body, uniformly pouring concrete into a gap between a cover plate and the side template of the solid section pier body, and after the gap is filled, pumping concrete into a mold and vibrating to compact the concrete;
after concrete pouring is finished, water is sprayed to cover and maintain, and when the design strength reaches 75%, the side template of the solid section pier body is dismantled, so that the invention has the beneficial effects that:
according to the beam-arch combined rigid frame bridge provided by the invention, one end of the lower chord supporting beam is connected to the pier, the other end of the lower chord supporting beam is connected to the bottom of the beam body, the lower chord supporting beam is positioned between two adjacent piers, and the bottom edge line of the lower chord supporting beam is changed according to the 2.2-time parabolic law.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a bottom die auxiliary dismounting device according to an embodiment of the present invention;
fig. 2 is a structural analysis table of a beam-arch composite rigid frame bridge and a solid-web beam-arch composite rigid frame bridge according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a construction method of a pier in a catastrophe state according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
The embodiment of the invention discloses a beam-arch combined rigid frame bridge.
Fig. 1 is a schematic structural diagram of a beam-arch combined rigid frame bridge according to an embodiment of the present invention, and referring to fig. 1, the rigid frame bridge includes a pile foundation 1, a cap 2, a pier 3, a beam 4, and a lower chord support beam 5.
With reference to fig. 1, a bearing platform 2 according to an embodiment of the present invention is poured on a pile foundation 1, a plurality of piers 3 are arranged corresponding to the bearing platform 2 at intervals along a bridge direction, the piers 3 are arranged on the corresponding bearing platform 2, and the pile foundation 1, the bearing platform 2, and the piers 3 together form a support foundation of a beam 4.
Referring to fig. 1, a beam body 4 according to an embodiment of the present invention is supported by a plurality of piers 3, and one end of a lower chord support beam 5 is connected to the piers 3, the other end of the lower chord support beam 5 is connected to the bottom of the beam body 4, the lower chord support beam 5 is located between two adjacent piers 3, and the bottom edge line of the lower chord support beam 5 changes according to a 2.2-time parabolic law.
Specifically, in the embodiment of the invention, the total length of the main bridge is 785m, the bridge deck of the main bridge is arranged in two rows, the width of each standard section is 18.0m, the bridge body 4 is provided with 5 bridge pier supports, the bridge piers are respectively a P1 bridge pier, a P2 bridge pier, a P3 bridge pier, a P4 bridge pier and a P5 bridge pier along the bridge direction, the span diameter is arranged to be 140+245+190+130+80m, wherein the heights of the P2 bridge pier and the P3 bridge pier are 65.5m, the total width of the pier top in the transverse bridge direction is 11.0m, the total width of the bridge along the bridge direction is 7.0m, the total width of the pier bottom in the transverse bridge direction is 11.6m, and the total width of.
In the field of bridge construction, the rise-span ratio is an important index reflecting the stress characteristic of an arch bridge, reasonable rise-span ratios of different structures are researched from the structural limit bearing capacity, stability or steel consumption and dynamic characteristic angles, and finally the rise-span ratio of the lower chord supporting beam 5 is determined to be 1/7.77-1/5 so as to have the stress characteristic of a flat arch.
Further, referring to fig. 1, in the embodiment of the present invention, two lower chord support beams 5 are disposed between two adjacent piers 3 (between a P2 pier and a P3 pier in the embodiment of the present invention), that is, the two lower chord support beams 5 are disposed oppositely, and the other ends of the two lower chord support beams 5 are butted.
Further, referring to fig. 1, a lower chord support beam 5 may be disposed between two adjacent piers 3 (between a P1 pier and a P2 pier, and between a P3 pier and a P4 pier in the embodiment of the present invention), one end of the lower chord support beam 5 being disposed on one of the piers 3 located between the two adjacent piers 3, and the other end of the lower chord support beam 5 being disposed in the middle of the beam body 4 located between the two adjacent piers 3.
Of course, due to space limitation, the lower chord support beam 5 may not be provided between two adjacent piers 3, for example, between the P4 pier and the P5 pier in the embodiment of the present invention.
Fig. 2 is a structural analysis table of the beam-arch combined rigid frame bridge and the solid-web beam-arch combined rigid frame bridge according to the embodiment of the present invention, and it can be seen from fig. 2 that each key index (dotted line portion in the table) of the beam-arch combined rigid frame bridge according to the embodiment of the present invention is improved, and the beam-arch combined rigid frame bridge of this type can exert the respective characteristics of the concrete arch bridge and the prestressed concrete rigid frame bridge to the maximum extent, fully exert the arch-assisted concrete pressure resistance, can overcome the problems of span-in-span downwarping and web cracking, etc., which are commonly existing in the large-span continuous rigid frame bridge, and is a novel combined structure system with clear structural stress, beautiful appearance, and novel structure.
In order to save materials and reduce self weight, part of the piers in the embodiment of the invention can adopt thin-wall hollow piers, specifically, in the embodiment of the invention, the P2 pier, the P3 pier and the P4 pier can adopt thin-wall hollow piers, and the P2 pier and the P3 pier respectively comprise a hollow section pier body and a solid section pier body which are sequentially poured from bottom to top.
In the prior art, when the pier body of the thin-wall hollow pier is constructed, when the construction is carried out to the joint part of the hollow section and the solid section, a technical problem can be encountered: how to install the bottom die of the solid section pier body, the traditional construction process is that brackets are embedded along the periphery of the pier wall at a position which is away from the bottom of the solid section of the pier top by a certain height after the pier body is constructed, then a bottom die support of the solid section of the pier top is erected by taking the brackets as fulcrums, and a bottom die plate is installed. The traditional construction method has the problems of complicated working procedures, large workload, long construction period and the like, can not realize the recycling of materials such as the bottom formwork support and the embedded bracket of the solid section pier body, and has higher construction cost. Therefore, the embodiment of the invention improves the method and discloses a construction method of the pier, so as to solve the problems of complicated working procedure, long construction period, high cost and the like of the bottom die of the solid section of the thin-wall hollow pier.
Fig. 3 is a schematic flow chart of a construction method of a pier in a time-lapse situation according to the present invention, and with reference to fig. 3, the construction method includes:
s1: pouring a hollow section pier body;
s2: after the hollow section pier body is poured, installing an external side template of the solid section pier body on the top of the hollow section pier body;
s3: hoisting the cover plate of the solid section pier body to the bin top hole at the top of the hollow section pier body;
s4: and (4) finishing pouring of the solid section pier body by utilizing the side template and the cover plate of the solid section pier body.
Namely, in the construction method of the pier shown in the embodiment of the invention, the cover plate is used for sealing the bin top hole at the top of the pier body of the hollow section, the cover plate is used as a bottom mould for pouring the pier body of the solid section, and the cover plate and the pier concrete form a part of the pier together, so that the concrete of the pier body of the solid section is poured at one time. This scheme need not lay wooden model or rigid mould in addition again as the closure basement membrane, convenient operation, and reduced processes such as the bracket is pre-buried, support setting up and die block installation, effectively shortened the engineering time, reduced numerous and diverse construction process, reduced the potential safety hazard, still owing to can not use disposable consumptive materials such as bracket, die block support and die block, reduce construction cost, economic performance is better.
S1 of the embodiment of the present invention specifically includes:
sequentially pouring each hollow bin of the hollow section pier body;
when the last hollow bin at the top of the hollow section pier body is poured, after the concrete strength of the last hollow bin at the top of the hollow section pier body reaches 80%, the external side template of the last hollow bin and the internal side templates of the last hollow bin and the last hollow bin are sequentially detached.
S2 of the embodiment of the present invention specifically includes:
the outer side template of the hollow section pier body is lifted and installed on the outer side template on the hollow bin at the last bin at the top of the hollow section pier body, namely the outer side template of the hollow section pier body is reused and supported by the outer side template on the hollow bin at the last bin at the top of the hollow section pier body, so that the outer side template can be circulated, the hollow section pier body external side template is economical, a support for supporting the outer side template of the solid section pier body is not needed, and the construction period is shortened.
S3 of the embodiment of the present invention specifically includes:
the cover plate is prefabricated, the cover plate comprises two concrete prefabricated plates, the concrete prefabricated plates can adopt C30 concrete, a single-layer steel bar net is adopted, the steel bars of the single-layer steel bar net are single-layer steel bars in the longitudinal and transverse directions, and two lifting rings are embedded in the middle of the long sides of the cover plate so as to be convenient to lift;
the method comprises the following steps of pre-embedding four positioning reinforcing steel bar heads at the contact part of the opening edge of the last hollow bin at the top of the hollow section pier body and a cover plate, wherein the four positioning reinforcing steel bar heads are respectively arranged in the middle of the side edge of the opening edge of the last hollow bin at the top of the hollow section pier body to prevent the prefabricated cover plate from sliding, and precisely releasing the contour line of the cover plate on the top surface of the last hollow bin at the top of the hollow section pier body by taking the center line of a pier as the center to facilitate the positioning of the cover plate;
before the cover plate is hoisted, carrying out concrete strength resilience detection on the cover plate to ensure that the concrete strength of the cover plate reaches more than 80% of the design strength;
correspondingly hanging one ends of four equal-length steel wire ropes on hanging rings respectively, correspondingly hanging the other ends of the four equal-length steel wire ropes on a lifting hook of lifting equipment (such as a tower crane) respectively, starting to hoist the cover plate when the lifting equipment works, and keeping the cover plate horizontal and not inclined when the lifting equipment works;
when the cover plate is lifted in place, the edge of the cover plate is accurately aligned according to the contour line, so that the distances between the four edges of the cover plate and the pier contact surface at the top of the hollow bin at the last bin at the top of the hollow pier body are consistent, and the stress balance of the stretcher plates at the edge of the cover plate is ensured;
and after the cover plate is hoisted, mortar is smeared at the joint positions of the cover plate and the outer side template of the solid section pier body to seal the joint.
In the embodiment of the invention, the prefabrication of the cover plate can be synchronously carried out in the pier construction, so that the construction period is further shortened.
S4 of the embodiment of the present invention specifically includes:
binding the reinforcing steel bars at the solid section of the pier top: installing main ribs on the inner side of a side template of the solid section pier body, wherein the main ribs are divided into a first main rib group connected with the side edge of the last hollow bin at the top of the hollow section pier body and a second main rib group installed at the top of the cover plate; installing a plurality of annular horizontal ribs on the inner side of the side template of the solid section pier body, wherein the plurality of annular horizontal ribs are sequentially arranged from bottom to top and from outside to inside; the inner sides of the side templates of the solid pier bodies are provided with drag hook reinforcing steel bars, and drag hook reinforcing steel bars are arranged between adjacent main reinforcing steel bars along the bridge direction;
pouring concrete: chiseling and cleaning the concrete joint surface on the inner side of the side template of the solid section pier body, uniformly pouring concrete into a gap between the cover plate and the side template of the solid section pier body, namely realizing the complete fixation of the cover plate, pumping concrete into a mold after the gap is filled, and vibrating and compacting;
and after concrete pouring is finished, sprinkling water, covering and maintaining, and removing the side template of the solid section pier body when the design strength reaches 75%, namely finishing pouring of the solid section pier body.
The following embodiments are provided for the purpose of illustrating the present invention and are not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the technical features of the present invention can be modified or changed in some ways without departing from the scope of the present invention.

Claims (10)

1. A bridge-arch composite rigid frame bridge, characterized in that said rigid frame bridge comprises:
a pile foundation (1);
the bearing platform (2), the bearing platform (2) is poured on the pile foundation (1);
the bridge pier (3) and the bearing platform (2) are correspondingly arranged, a plurality of bridge piers (3) are arranged at intervals along the bridge direction, and the bridge piers (3) are arranged on the corresponding bearing platform (2);
a girder (4), wherein the girder (4) is supported by a plurality of piers (3);
the lower chord supporting beam (5), the one end of lower chord supporting beam (5) is connected on pier (3), the other end of lower chord supporting beam (5) is connected the bottom of roof beam body (4), lower chord supporting beam (5) are located two adjacent between pier (3), the bottom edge line of lower chord supporting beam (5) changes according to 2.2 times parabola law.
2. The bridge-arch composite rigid frame bridge according to claim 1, wherein the lower chord support beam (5) has a sagittal-to-transverse ratio of 1/7.77-1/5.
3. The arched-beam combined rigid frame bridge according to claim 1, wherein two lower-chord support beams (5) are disposed between two adjacent piers (3), the two lower-chord support beams (5) are disposed oppositely, and the other ends of the two lower-chord support beams (5) are butted.
4. A girder-arch combined rigid frame bridge according to claim 1, wherein one lower chord supporting beam (5) is provided between two adjacent piers (3), one end of the lower chord supporting beam (5) is provided on one of the piers (3) between the two adjacent piers (3), and the other end of the lower chord supporting beam (5) is provided in the middle of a girder (4) between the two adjacent piers (3).
5. The arched-beam combined rigid frame bridge according to any one of claims 1 to 4, wherein the pier body of the pier (3) comprises a hollow section pier body and a solid section pier body which are sequentially poured from bottom to top.
6. A construction method of a pier of a girder-arch combined rigid frame bridge according to claim 5, wherein the construction method comprises:
pouring a hollow section pier body;
after the hollow section pier body is poured, installing an external side template of the solid section pier body on the top of the hollow section pier body;
hoisting the cover plate of the solid section pier body to the bin top hole at the top of the hollow section pier body;
and (4) finishing pouring of the solid section pier body by utilizing the side template and the cover plate of the solid section pier body.
7. The construction method of the pier of the beam-arch combined rigid frame bridge, according to claim 6, wherein the step of pouring the hollow section pier body specifically comprises the steps of:
sequentially pouring each hollow bin of the hollow section pier body;
when the last hollow bin at the top of the hollow section pier body is poured, after the concrete strength of the last hollow bin at the top of the hollow section pier body reaches 80%, the external side template of the last hollow bin and the internal side templates of the last hollow bin and the last hollow bin are sequentially detached.
8. The construction method of a pier of a beam-arch combined rigid frame bridge according to claim 7, wherein the step of installing the external side formwork of the solid section pier body on the top of the hollow section pier body specifically comprises:
and lifting and installing the outer side template of the hollow section pier body to the outer side template on the last hollow bin at the top of the hollow section pier body.
9. The construction method of the pier of the beam-arch combined rigid frame bridge, according to claim 8, wherein the step of hoisting the cover plate of the solid section pier body to the top opening of the hollow section pier body specifically comprises the steps of:
the cover plate is prefabricated, the cover plate comprises two concrete prefabricated plates, the concrete prefabricated plates adopt single-layer steel bar meshes, the reinforcing bars of the concrete prefabricated plates are single-layer reinforcing bars in the longitudinal and transverse directions, and two hanging rings are embedded in the middle of the long edges of the two sides of the cover plate;
embedding four positioning reinforcing steel bar heads at the contact part of the opening edge of the last hollow bin at the top of the hollow section pier body and the cover plate, wherein the four positioning reinforcing steel bar heads are respectively arranged in the middle of the side edge of the opening edge of the last hollow bin at the top of the hollow section pier body, and precisely releasing the contour line of the cover plate on the top surface of the last hollow bin at the top of the hollow pier body by taking the center line of a pier as the center;
before the cover plate is hoisted, carrying out concrete strength resilience detection on the cover plate to ensure that the concrete strength of the cover plate reaches more than 80% of the design strength;
correspondingly hanging one ends of four equal-length steel wire ropes on hanging rings respectively, correspondingly hanging the other ends of the four equal-length steel wire ropes on a hanging hook of hoisting equipment respectively, and starting to hoist the cover plate when the hoisting equipment works;
when the cover plate is lifted in place, the edge of the cover plate is accurately aligned according to the contour line, so that the distances between the four edges of the cover plate and the contact surface of the top pier of the last hollow bin at the top of the hollow pier body are consistent;
and after the cover plate is hoisted, mortar is smeared at the joint positions of the cover plate and the outer side template of the solid section pier body to seal the joint.
10. The construction method of the pier of the beam-arch combined rigid frame bridge, according to claim 6, wherein the pouring of the solid section pier body is completed by using a side template and a cover plate of the solid section pier body, and specifically comprises:
binding the reinforcing steel bars at the solid section of the pier top: installing main ribs on the inner side of a side template of the solid section pier body, wherein the main ribs are divided into a first main rib group connected with the side edge of the last hollow bin at the top of the hollow section pier body and a second main rib group installed at the top of the cover plate; installing a plurality of annular horizontal ribs on the inner side of a side template of the solid section pier body, wherein the plurality of annular horizontal ribs are sequentially arranged from bottom to top and from outside to inside; installing drag hook reinforcing steel bars on the inner sides of the side templates of the solid pier bodies, and arranging the drag hook reinforcing steel bars between the adjacent main reinforcing steel bars along the bridge direction;
pouring concrete: performing chiseling cleaning treatment on a concrete joint surface on the inner side of a side template of the solid section pier body, uniformly pouring concrete into a gap between a cover plate and the side template of the solid section pier body, and after the gap is filled, pumping concrete into a mold and vibrating to compact the concrete;
and after concrete pouring is finished, sprinkling water, covering and maintaining, and removing the side template of the solid section pier body when the design strength reaches 75%.
CN202010466768.3A 2020-05-28 2020-05-28 Beam-arch combined rigid frame bridge and construction method of bridge pier thereof Pending CN111749133A (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN112127265A (en) * 2020-10-30 2020-12-25 中铁大桥勘测设计院集团有限公司 Steel diagonal bracing continuous rigid frame bridge
CN112227216A (en) * 2020-10-30 2021-01-15 中铁大桥勘测设计院集团有限公司 Triangular area cable buckling and sling combined construction method for steel diagonal bracing continuous rigid frame bridge

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