CN111005308A - Single-column type bridge pier beam bridge and reinforcing and modifying method thereof - Google Patents

Single-column type bridge pier beam bridge and reinforcing and modifying method thereof Download PDF

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Publication number
CN111005308A
CN111005308A CN201911376382.7A CN201911376382A CN111005308A CN 111005308 A CN111005308 A CN 111005308A CN 201911376382 A CN201911376382 A CN 201911376382A CN 111005308 A CN111005308 A CN 111005308A
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CN
China
Prior art keywords
pull rod
wedge
clamping groove
groove
shaped
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CN201911376382.7A
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Chinese (zh)
Inventor
王昌将
严磬
郭斌强
叶建龙
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Zhejiang Provincial Institute of Communications Planning Design and Research Co Ltd
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Zhejiang Provincial Institute of Communications Planning Design and Research Co Ltd
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Priority to CN201911376382.7A priority Critical patent/CN111005308A/en
Publication of CN111005308A publication Critical patent/CN111005308A/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
    • 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
    • E01D22/00Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges

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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention relates to a beam bridge with a single column type bridge pier and a reinforcing and reforming method of the beam bridge with the single column type bridge pier, and belongs to the technical field of bridge reinforcing and reforming. The method comprises the following steps: (1) measuring the inclination angle of the side surface of the main beam and the side surface of the pier; (2) the prefabricated anti-overturning device comprises a wedge-shaped mother board, a pull rod clamping groove and a pull rod; (3) driving an anchoring bolt at a preset position of the side surface part, and fixing an upper wedge-shaped mother board and a lower wedge-shaped mother board on the corresponding side surface parts by using nuts; (4) the two expansion end parts of the pull rod are clamped into the groove cavities of the upper pull rod clamping groove and the lower pull rod clamping groove from the open end of the clamping groove, and a movable gap can be reserved between the two expansion end parts of each pull rod and each cavity wall of the groove cavity clamped by the two expansion end parts; (5) and filling a non-hydrophilic lubricant in the groove cavity of the pull rod clamping groove, and sealing the groove cavity of the pull rod clamping groove into a sealing cavity. The reinforcing and reforming method is convenient to construct, low in cost and convenient to replace in the subsequent maintenance process, and can be widely applied to the field of reinforcing and reforming of bridges.

Description

Single-column type bridge pier beam bridge and reinforcing and modifying method thereof
Technical Field
The invention relates to the technical field of bridge reconstruction and reinforcement, in particular to a single-column pier beam bridge with an anti-overturning device and a method for performing reinforcement and reconstruction on the conventional single-column pier beam bridge.
Background
The single-column pier beam bridge has small floor area and low cost because the single-column piers are adopted to support the girder plates, and is more commonly used in the erection of viaducts; however, the acceptance of the existence is not reasonable, and the one-sided overload is easy to cause overturn.
In order to fully utilize the small floor area of the single-column pier, facilitate the use in the urban elevated system with small floor area, and overcome the defect that it is easy to overturn when it is overloaded on one side, patent document with publication number CN203096599U discloses a tension-compression rod type steel and concrete combined beam bridge anti-overturning device, which comprises a web plate, a support, a cover beam and a pier stud, wherein the cover beam is arranged on the pier stud, the support is arranged on the cover beam, the web plate is arranged on the support, the anti-overturning device comprises an ear plate, a fork-shaped ear plate and a tension-compression rod, the ear plate is arranged on the side surface of the web plate, the fork-shaped ear plate is connected with the ear plate through a pin shaft, one end of the tension-compression rod is fixed on one side of the cover beam, and the other end of the tension-compression rod is connected with the. The anti-overturning device improves the anti-overturning performance of the main beam by arranging the tension and compression rod, but the structure is difficult to modify the beam bridge with a large number of built single-column type piers in the existing road so as to improve the anti-overturning performance of the bridge.
In order to solve the technical problems of the technical solutions of the above patent documents, patent document No. CN203160116U discloses an anti-overturning pier mechanism, which includes pier columns, carbon fiber cloth, steel hoop assemblies, six support columns and a plurality of connectors; the steel hoop component comprises two horizontal supporting plates, two semicircular cylinders, four connecting plates, a plurality of semicircular rib plates, a plurality of supporting rib plates and a plurality of rectangular rib plates; the two semicircular cylinders form a circular cylinder through four connecting plates, supporting columns are arranged on the horizontal supporting plates, the horizontal supporting plates are arranged on the upper surface of the circular cylinder, the upper end of each supporting rib plate is connected with the lower surface of the corresponding horizontal supporting plate, the carbon fiber cloth is wound on the top end of the pier column, and the circular cylinder is sleeved on the carbon fiber cloth on the outer side of the pier column; pier mechanism based on this structural design can reform transform current column pier well, but it has following problem, not only because need improve antidumping support for the girder and can not reform transform fast, and is with high costs, and difficult transformation when the problem appears.
Disclosure of Invention
The invention mainly aims to provide a reinforcing and reforming method of a beam bridge of a single-column pier, which is convenient for reinforcing and reforming construction, has low reinforcing and reforming cost and is convenient for replacing parts in the subsequent maintenance process;
another object of the present invention is to provide a single-pier girder bridge having an anti-overturning device, which has an anti-overturning property, is low in cost, and facilitates replacement of parts during subsequent maintenance.
In order to achieve the main object, the present invention provides a method for reinforcing and reconstructing a beam bridge of an existing single pier, comprising the steps of:
a measuring step of measuring the inclination angles of the side faces of the main beam and the pier respectively;
a material preparation step, wherein an upper wedge-shaped mother board fixed on two side surface parts of the main beam and a lower wedge-shaped mother board fixed on two side surface parts of the bridge pier are configured according to the measured inclination angle, and after the upper wedge-shaped mother board and the lower wedge-shaped mother board are fixed on corresponding side surface parts, the outer plate surfaces of the two mother boards are approximately arranged in a coplanar manner; the outer plate surfaces of the two mother plates are fixedly provided with pull rod clamping grooves with notches arranged oppositely, the groove length direction of the pull rod clamping grooves is arranged along the plate surface direction parallel to the fixed outer plate surfaces, the notches of the pull rod clamping grooves are in a necking structure relative to the groove cavities, and at least one end part of each notch is an open end;
an installation step, wherein an anchoring bolt is driven into a preset position of the side surface part of the main beam and the side surface part of the bridge pier, and the upper wedge-shaped mother board and the lower wedge-shaped mother board are fixed on the corresponding side surface parts by utilizing the screwing and matching of a nut and the anchoring bolt;
clamping, namely clamping two expansion end parts of the pull rod into groove cavities of an upper pull rod clamping groove and a lower pull rod clamping groove from the open end of the clamping groove, wherein a movable gap can be reserved between the two expansion end parts of each pull rod and each cavity wall of the groove cavity clamped by the two expansion end parts;
and filling and sealing, namely filling a non-hydrophilic lubricant in the groove cavity of the draw bar clamping groove and sealing the groove cavity of the draw bar clamping groove into a sealing cavity.
According to the scheme, the arrangement foundation of the pull rod clamping grooves is constructed by adopting the wedge-shaped mother board, the structures of the main beams and the piers with different structures can be well matched, and the pull rods which are relatively movable relative to the pull rod clamping grooves exert pulling force on the main beams and the piers, so that when the main beams are overloaded on one side, the pull rods on the other side can be used for providing overload counteracting force, the side pull rods are prevented from being pressed and deformed due to the movable gaps between the clamping ends and the groove cavities, and the labor-saving levers are formed by the supporting points between the main beams and the piers, so that the overload overturning problem is effectively avoided; and the notches of the draw bar clamping grooves are arranged on the side surface, so that the clamping end parts of the draw bars can be clamped conveniently from the side surface, and the sealing plate can be detached to replace all the components in the subsequent use process. In addition, in the reinforcing and transforming process, only a small number of bolt fixing holes need to be drilled, and most of procedures are prefabricated outside the site, so that the time required by transformation is shortened, and the obstruction to normal traffic operation is reduced.
The specific scheme is that the filling and sealing steps sequentially comprise the following steps:
filling a non-hydrophilic lubricant into a groove cavity of the pull rod clamping groove by utilizing an opening of the pull rod clamping groove, and sealing the opening end of the clamping groove by utilizing a cover plate;
and then, a gap between the pull rod and the notch of the clamping groove is utilized to supplement non-hydrophilic lubricant to the groove cavity, and the water-stopping rubber strip is tightly plugged at the notch after the supplement is completed.
According to the scheme, the water-proof and non-hydrophilic lubricant is effectively prevented from leaking.
The more specific proposal is that the water-stopping rubber strip comprises a sealing plug body part which is used for being plugged into a gap between the pull rod and the wall of the notch and an external connecting part which is used for fixing; the outer connecting part is provided with a mounting through hole; and the end face of the notch of the draw-bar clamping groove is provided with a screw hole for matching with a screw passing through the mounting through hole, so that the water-stopping rubber strip is detachably fixed on the draw-bar clamping groove. Improve the installation firmness of stagnant water rubber strip.
Preferably, a wedge-shaped daughter board is padded between the nut and the outer board surface of the wedge-shaped mother board, and the outer board surface of the wedge-shaped daughter board is parallel to the surface of the side surface part fixed by the mother board. Ensure effectively that the anchor bolt can arrange along the direction of perpendicular to girder side portion or pier side portion, and improve the anchor firmness.
The minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped mother plate is larger than the first preset distance so as to improve the structural strength of the wedge-shaped mother plate and improve the installation firmness; the minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped daughter board is larger than the second preset distance, so that the structural strength of the wedge-shaped mother board is improved, and the installation firmness is improved; the wedge-shaped mother board and the wedge-shaped daughter board are both of long strip structures which are arranged along the groove length direction of the pull rod clamping groove in an extending mode, so that a plurality of pull rods can be conveniently installed, and the tensile strength is improved; a plurality of pull rod clamping grooves are distributed on the strip-shaped wedge-shaped mother board.
The extending direction of the notch of the draw bar clamping groove is arranged along the horizontal direction; the projection of the pull rod on the vertical plane is arranged along the vertical direction, so that the anti-overturning effect of the pull force of the pull rod is improved.
The preferred proposal is that the pull rod is of a plate body structure; the pull rod clamping groove is fixedly arranged on the outer plate surface of the wedge-shaped mother plate through welding; the non-hydrophilic lubricant is petrolatum; the draw-bar groove is an open groove structure with two open ends.
In order to achieve the above another object, the present invention provides a single-column pier beam bridge comprising a pier, a girder supported on the pier, and an anti-overturning device disposed between the single-column pier and the girder; anti-overturning devices are uniformly distributed on two sides of the single-column pier; the anti-overturning device comprises an upper pull rod clamping groove component fixedly arranged on the side surface part of the main beam, a lower pull rod clamping groove component fixedly arranged on the side surface part of the pier, and a pull rod with two ends clamping end parts; the pull rod clamping groove assembly comprises a wedge-shaped mother board provided with a mounting through hole and a pull rod clamping groove fixedly arranged on the outer board surface of the wedge-shaped mother board; the notch of the draw bar clamping groove is of a necking structure relative to the groove cavity, the groove length direction of the draw bar clamping groove is arranged along the direction parallel to the plate surface of the outer plate surface fixed by the draw bar clamping groove, and at least one end part is an open end and is used for detachably sleeving the clamping end part in the groove cavity; the cover plate is detachably arranged on the open end part of the clamping groove, movable gaps are reserved between the clamping end part and each cavity wall of the groove cavity, and the groove cavity is filled with a non-hydrophilic lubricant.
According to the scheme, the arrangement foundation of the pull rod clamping grooves is constructed by adopting the wedge-shaped mother board, the structures of the main beam and the bridge pier with different structures can be well matched, and the pull rod which is relatively movable relative to the pull rod clamping grooves exerts pulling force on the main beam and the bridge pier, so that when the main beam is overloaded on one side, the pull rod on the other side can be used for providing overload counteracting force, the pull rod on the other side is prevented from being pressed and deformed due to the movable gap between the clamping end and the groove cavity, and the labor-saving lever is formed by the fulcrum between the main beam and the bridge pier, so that the overload overturning problem is effectively avoided; and the notches of the draw bar clamping grooves are arranged on the side surface, so that the clamping end parts of the draw bars can be clamped conveniently from the side surface, and the sealing plate can be detached to replace all the components in the subsequent use process.
The specific scheme is that a groove cavity of the pull rod clamping groove is sealed by a sealing structure to form a sealing cavity for filling non-hydrophilic lubricant; the outer plate surfaces of the wedge-shaped mother plates of the upper and lower pull rod clamping groove assemblies are arranged in a coplanar manner; the pull rod clamping groove assembly comprises a water-stopping rubber strip for plugging a gap between the groove opening wall of the pull rod clamping groove and the pull rod; the pull rod clamping groove assembly comprises a wedge-shaped daughter board provided with an installation through hole and used for being padded on the outer board surface of the wedge-shaped mother board, and the outer board surface of the wedge-shaped daughter board is arranged in parallel with the inner board surface of the wedge-shaped mother board.
The preferred scheme is that the draw bar clamping groove is welded on the outer plate surface of the wedge-shaped motherboard; the non-hydrophilic lubricant is petrolatum; a plurality of pull rods are arranged between the upper and lower sets of pull rod clamping groove components; the minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped mother plate is larger than a first preset distance; the minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped daughter board is larger than a second preset distance; the draw-bar slot is an open slot structure with two open ends; the pull rod is of a plate body structure; the clamping end part is an expansion end part which expands outwards relative to the pull rod body.
Drawings
FIG. 1 is a flowchart of the reinforcement and reconstruction method in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a pier and a girder after reinforcement and reconstruction in embodiment 1 of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
FIG. 4 is an enlarged view of a portion B of FIG. 2;
fig. 5 is a schematic structural view of an anti-overturning device in embodiment 1 of the present invention;
FIG. 6 is an enlarged view of a portion C of FIG. 5;
fig. 7 is an exploded view of the anti-overturning device, the main beam, and the bridge pier according to embodiment 1 of the present invention;
fig. 8 is a schematic structural view of a wedge-shaped mother board, a wedge-shaped daughter board, a pull rod clamping groove, a water stop rubber strip, an anchor bolt, and a nut in embodiment 1 of the present invention;
fig. 9 is a schematic structural view of a tie-bar slot assembly fixed to the side of a pier and a girder in embodiment 1 of the present invention;
fig. 10 is a schematic structural view of the tie bar of embodiment 1 of the present invention cooperating with a tie bar slot assembly fixed to a side of a pier and a main girder;
fig. 11 is a schematic structural view of a cover plate, a water stop rubber block, a pull rod, a clamping groove and a locking screw in embodiment 1 of the present invention;
FIG. 12 is an enlarged view of a portion D of FIG. 11;
fig. 13 is a schematic structural view of a wedge-shaped mother board, a wedge-shaped daughter board, a tie bar slot, a water stop rubber strip, an anchor bolt, and a nut in embodiment 2 of the present invention.
Detailed Description
The invention is further illustrated by the following examples and figures.
Example 1
Referring to fig. 1 to 12, the reinforcing and modifying method of the present invention is to perform reinforcing and modifying on an existing single-pier beam bridge which is already built, specifically, by using an anti-overturning device newly designed by the applicant. As shown in fig. 2, the constructed single-pier girder bridge includes a pier 02 and girders 01 supported by the pier 02, and a set of anti-overturning devices 1 are installed on both sides of the pier 02.
As shown in fig. 2 to 12, each anti-overturning device 1 comprises an upper pull rod clamping groove component 2 fixedly mounted on a side portion 010 of a main beam, a lower pull rod clamping groove component 3 fixedly mounted on a side portion 020 of a bridge pier, and a pull rod 4 with two ends being clamping end portions; in this embodiment, the number of the pull rods 4 is two or more, specifically three, and the pull rods 4 are flat plate structures. The pull rod 4 includes a rod body 41 with uniform thickness and holding end portions 40 arranged at both ends.
The upper pull rod clamping groove assembly 2 comprises a wedge-shaped mother board 20 provided with a mounting through hole 201, a pull rod clamping groove 5 fixedly arranged on the outer board surface of the wedge-shaped mother board 20, an anchoring bolt 21 used for fixedly mounting the wedge-shaped mother board 20 on the side face part 010 of the main beam, a wedge-shaped daughter board 23 padded between the wedge-shaped mother board 20 and a fastening nut 22, and a water stop rubber strip 25 used for plugging a gap between the groove opening wall of the pull rod clamping groove 5 and the pull rod 4; the wedge sub-plate 23 is provided with a mounting through-hole 230 adapted to the mounting through-hole 201 and through which the anchor bolt 21 is inserted and fixed. The notch 50 of the draw bar slot 5 is of a necking structure relative to the slot cavity 51, the slot length direction of the draw bar slot 5 is arranged along the direction parallel to the outer plate surface of the wedge-shaped mother plate 20, and at least one end part is an open end, so that the clamping end part 40 which is of an expansion structure on the draw bar 4 is detachably sleeved in the slot cavity 51. In this embodiment, the draw bar slot 5 is an open slot structure with two open ends; the groove length direction of the pull rod clamping groove 5 is arranged along the plate surface direction parallel to the outer plate surface of the wedge-shaped mother plate 20, namely, the direction is vertical to the paper surface direction shown in fig. 3 and 4, the height direction of the pier 02 is arranged along the longitudinal direction of the paper surface, namely, the extending directions of the notch 50 and the groove cavity 51 of the pull rod clamping groove 5 are both arranged along the horizontal direction, and the projection of the pull rod 4 on the vertical plane is arranged along the vertical direction, so that the stress performance of the pull rod 4 and the pull rod clamping groove 5 is optimized; the draw bar clamping groove 5 is fixed on the outer plate surface of the wedge-shaped mother plate 20 in a welding mode.
The wedge-shaped daughter board 23 is arranged between the fastening nut 22 and the wedge-shaped mother board 20 in a cushioning mode, the outer board surface of the wedge-shaped daughter board 23 is parallel to the surface of the side surface of the main beam 010 fixed to the wedge-shaped mother board 20, namely the wedge-shaped daughter board 23 is arranged on the outer board surface of the wedge-shaped mother board 20 in a cushioning mode, and the outer board surface of the wedge-shaped daughter board 23 is arranged in parallel to the inner board surface of the wedge-shaped mother board 20.
The cover plate 24 is detachably disposed on the open end 52 of the slot and fixed by the detachable screw 29, after the end 40 of the pull rod 4 is clamped, a clearance is required between the end 40 and each cavity wall of the slot 51, and the slot 51 is filled with a non-hydrophilic lubricant, in this embodiment, vaseline is used to construct the non-hydrophilic lubricant.
As to the specific structure of the two holding end portions of the pull rod 4, in addition to the expansion end structure which is integrally molded with the rod body as shown in the drawing, the holding end portion structure of the present embodiment may be constructed by providing a necking portion structure which is fitted around the notch 50 at the end portion of the pull rod, or by fixing a roller which is rotatably supported in the notch 51 thereto.
As shown in fig. 5, the wedge-shaped mother board 20 and the wedge-shaped daughter board 23 are both strip-shaped structures extending along the slot length direction of the pull rod slot 5, that is, arranged along the direction perpendicular to the paper surface shown in fig. 3; and a plurality of pull rod clamping grooves 5 are arranged on the strip-shaped wedge-shaped mother plate 23, so that a plurality of pull rods 4 can be clamped on the wedge-shaped mother plate 23, and higher anti-overturning pulling force is provided.
Referring to the structural form of the lower pull rod slot assembly 3 shown in fig. 8, the minimum distance between the inner and outer plate surfaces of the wedge-shaped mother plate 20 is greater than the first preset distance, the minimum distance between the inner and outer plate surfaces of the wedge-shaped daughter plate 23 is greater than the second preset distance, that is, the thickness of the thinnest part of the wedge-shaped mother plate is greater than the preset distance, so that the fixing firmness on the main beam 01 or the pier 02 is effectively ensured.
The lower pull rod clamping groove assembly 3 comprises a wedge-shaped mother plate 30 provided with a mounting through hole 301, a pull rod clamping groove 6 fixedly arranged on the outer plate surface of the wedge-shaped mother plate 30, an anchoring bolt 31 used for fixedly mounting the wedge-shaped mother plate 30 on the main beam side surface part 010, a wedge-shaped daughter plate 33 padded between the wedge-shaped mother plate 30 and a fastening nut 32, and a water stop rubber strip 35 used for plugging a gap between the groove opening wall of the pull rod clamping groove 6 and the pull rod 4; the wedge sub-plate 33 is provided with a mounting through-hole 330 adapted to the mounting through-hole 301 and through which the anchor bolt 31 is inserted and fixed. The notch 60 of the tie bar slot 6 is of a necking structure relative to the slot cavity 61, and the slot length direction of the tie bar slot 6 is arranged along the direction parallel to the outer plate surface of the wedge-shaped mother plate 30, and at least one end part is an open end, so that the holding end part 40 which is of an expansion structure on the tie bar 4 is detachably sleeved in the slot cavity 61. In this embodiment, the draw bar slot 6 is an open slot structure with two open ends; the length direction of the draw bar slot 6 is arranged along the plate surface direction parallel to the outer plate surface of the wedge-shaped mother plate 30, namely, the draw bar slot 6 is perpendicular to the paper surface direction shown in fig. 3 and 4, the height direction of the pier 02 is arranged along the longitudinal direction of the paper surface, namely, the extension directions of the notch 60 and the slot cavity 61 of the draw bar slot 6 are both arranged along the horizontal direction, and the projection of the draw bar 4 on the vertical plane is arranged along the vertical direction, so as to optimize the stress performance of the draw bar 4 and the draw bar slot 6; the draw bar clamping groove 6 is fixed on the outer plate surface of the wedge-shaped mother plate 30 in a welding mode.
The wedge-shaped daughter board 33 is arranged between the fastening nut 32 and the wedge-shaped mother board 30 in a cushioning mode, the outer board surface of the wedge-shaped daughter board 33 is parallel to the surface of the side surface of the main beam 010 fixed to the wedge-shaped mother board 30, namely the wedge-shaped daughter board 33 is arranged on the outer board surface of the wedge-shaped mother board 30 in a cushioning mode, and the outer board surface of the wedge-shaped daughter board 33 is arranged in parallel to the inner board surface of the wedge-shaped mother board 30.
The cover plate 34 is detachably disposed on the open end 62 of the slot, after the end 40 of the pull rod 4 is clamped, a movable gap is required to be reserved between the end 40 and each cavity wall of the slot 61, and the slot 61 is filled with a non-hydrophilic lubricant, in this embodiment, vaseline is used to construct the non-hydrophilic lubricant.
As to the specific structure of the two catching ends of the pull rod 4, in addition to the expansion end structure which is integrally molded with the rod body as shown in the drawing, the catching end structure of the present embodiment may be constructed by providing a necking portion structure which is fitted around the notch 60 at the end of the pull rod, or by fixing a roller which is rotatably supported in the notch 61 thereto.
As shown in fig. 5, the wedge-shaped mother board 30 and the wedge-shaped daughter board 33 are both strip-shaped structures extending along the slot length direction of the pull rod slot 6, that is, arranged along the direction perpendicular to the paper surface shown in fig. 3; and a plurality of pull rod clamping grooves 6 are distributed on the strip-shaped wedge-shaped mother board 33, so that a plurality of pull rods 4 can be clamped on the wedge-shaped mother board 33, and higher anti-overturning pulling force is provided.
By plugging the water-stop rubber strips 25, 35 between the tie rod 4 and the slot walls of the slots 50, 60, a sealed cavity for filling with the non-hydrophilic lubricant is created.
As shown in fig. 8, the minimum distance between the inside and outside surfaces of the wedge-shaped mother board 30 is greater than the first preset distance, and the minimum distance between the inside and outside surfaces of the wedge-shaped daughter board 33 is greater than the second preset distance, i.e., the thickness of the thinnest portion of the wedge-shaped daughter board is greater than the preset distance, so as to effectively ensure the firmness of the main beam 01 or the pier 02.
The reinforcement transformation method specifically comprises a measuring step S1, a prefabricating step S2, an installing step S3, a clamping step S4 and a filling and sealing step S5, and specifically comprises the following steps:
in the measurement step S1, the inclination angles of the girder side surface portions 010 and the pier side surface portions 020 are measured.
As shown in fig. 2, the inclination angles of both side surface portions 010 of the girder 01 and both side surface portions 020 of the pier 02 are measured with respect to a reference plane, which is a horizontal plane or a vertical plane in the present embodiment.
A prefabricating step S2 of arranging the wedge-shaped mother plates 20 fixed to the both side face portions 010 of the girder 01 and the wedge-shaped mother plates 30 fixed to the both side face portions 020 of the pier 02 according to the measured inclination angle, and arranging outer plate surfaces of the two mother plates substantially in a coplanar manner after the upper and lower wedge-shaped mother plates are fixed to the corresponding side face portions; and then a pull rod clamping groove 5 and a pull rod clamping groove 6 which are arranged oppositely in notch are welded on the outer plate surfaces of the two mother plates.
In the mounting step S3, the anchor bolts 21 and 31 are driven into predetermined positions of the girder side face portion 010 and the pier side face portion 020, and the upper and lower wedge-shaped mother plates are fixed to the corresponding side face portions by screwing the nuts 22 and 32 to the anchor bolts 21 and 31.
A clamping step S4, wherein the two clamping end parts of the pull rods 4 are clamped into the groove cavities 51 and 61 of the upper pull rod clamping groove and the lower pull rod clamping groove from the open ends of the clamping grooves 5 and 6, and a movable gap can be reserved between the two clamping end parts of each pull rod 4 and the cavity walls of the clamping groove cavities 50 and 60; in this embodiment, the movement pause ensures that when one side of the tie rod 4 is in tension, the other side is in a free state, which is neither compressed nor tensioned.
A filling and sealing step S5, filling non-hydrophilic lubricant in the groove cavities 51 and 61 of the draw bar clamping grooves 5 and 6, and sealing the groove cavities of the draw bar clamping grooves 5 and 6 into sealing cavities; the method specifically comprises the following steps:
and a filling and sealing step S51, filling a non-hydrophilic lubricant into the groove cavity of the draw bar clamping groove 5 by using the opening of the draw bar clamping groove, and sealing the opening ends of the clamping grooves 5 and 6 by using the cover plates 24 and 35.
And a step S52 of refilling sealing, namely supplementing non-hydrophilic lubricant into the groove cavity by using the gap between the pull rod 4 and the groove notches 50 and 60 until the whole sealing cavity is filled, and tightly plugging the water- stop rubber strips 25 and 35 at the notches after the completion of the supplementing.
If the scheme is seen, in the reinforcing and transforming process, only a small number of bolt fixing holes need to be drilled in the main beam 01 and the pier, and most of the procedures are prefabricated outside the site, so that the time required for transforming is shortened, and the obstruction to the normal operation of traffic is reduced.
After being modified, the beam bridge with the single-column pier is characterized in that the two sides of the single-column pier 02 are respectively provided with the anti-overturning devices, so that the anti-overturning performance of the beam bridge with the single-column pier is improved, and meanwhile, the advantage of small occupied area of the single-column pier is kept, namely, the structure can be used in a newly-built beam bridge with the single-column pier, so that the beam bridge with the single-column pier is formed, the structure is not described again, and the beam bridge with the single-column pier is not limited to the modification method.
Example 2
As an explanation of embodiment 2 of the present invention, only the difference from embodiment 1 described above, that is, the structure of the water-stop rubber strip, is modified as follows.
Referring to fig. 13, in the present embodiment, a structure of the water stop rubber strip 35 arranged on the lower pull rod bayonet component 3 is exemplified. The water-stopping rubber strip 35 comprises a sealing plug body part 350 and an external connecting part 351, wherein the sealing plug body part 350 is used for being plugged into a gap between the pull rod 4 and a notch wall of a notch 60 of the pull rod clamping groove 6 fixedly arranged on the wedge-shaped mother board 30; the external connection portion 351 is provided with a mounting through hole 352; and be equipped with screw 65 on the notch terminal surface of pull rod draw-in groove 6 for with the screw 36 cooperation that passes this installation through-hole 65, and fix stagnant water rubber strip 35 detachably on pull rod draw-in groove 6, thereby improve its fixed firmness on pull rod draw-in groove 6. In this embodiment, each outlet of the groove cavity 61 is sealed by the cover plate, the water-stop rubber strip 35, and the segment of the pull rod 4, thereby constructing a sealed cavity for filling the non-hydrophilic lubricant.
In the above embodiment, the anti-overturning device 1 adopts the wedge-shaped mother boards 20 and 30 to construct the layout basis of the pull rod clamping grooves 5 and 6, so that the structure of the main beam 01 and the pier 02 with different structures can be well matched, that is, only the wedge-shaped mother board and the wedge-shaped daughter board need to be customized for different structures of the pier and the main beam, other parts can be constructed by adopting general parts, so that the cost can be reduced, and the pull rod 4 relatively moving relative to the pull rod clamping grooves 5 and 6 exerts pulling force on the main beam 01 and the pier 02, so that when the main beam 01 is overloaded on one side, the pull rod 4 on the other side can be used for providing overload counteracting force, and the side pull rod 4 has a movable gap between the clamping end and the groove cavity to avoid compression deformation, and the fulcrum between the main beam and the pier forms a labor-saving lever to effectively avoid the overload overturning problem; and the notches of the draw bar clamping grooves 5 and 6 are arranged on the side surface, so that the clamping end parts of the draw bars can be clamped from the side surface conveniently, and the sealing plate can be detached to replace all the parts in the subsequent use process.

Claims (10)

1. A reinforcing and modifying method for a beam bridge of a single-column pier is characterized by comprising the following steps:
a measuring step of measuring the inclination angles of the side faces of the main beam and the pier respectively;
prefabricating, namely arranging upper wedge-shaped motherboards fixed to two side face parts of the main beam and lower wedge-shaped motherboards fixed to two side face parts of the bridge pier according to the measured inclination angle, and enabling outer plate surfaces of the two motherboards to be approximately arranged in a coplanar manner after the upper wedge-shaped motherboards and the lower wedge-shaped motherboards are fixed to corresponding side face parts; the outer plate surfaces of the two mother plates are fixedly provided with pull rod clamping grooves with notches arranged oppositely, the groove length direction of the pull rod clamping grooves is arranged along the direction parallel to the plate surface direction of the fixed outer plate surface, the notches of the pull rod clamping grooves are in a necking structure relative to the groove cavity, and at least one end part of each notch is an open end;
an installation step, namely, driving anchoring bolts into preset positions of the side surface part of the main beam and the side surface part of the bridge pier, and fixing an upper wedge-shaped mother board and a lower wedge-shaped mother board on the corresponding side surface parts by utilizing screwing and matching of nuts and the anchoring bolts;
clamping, namely clamping two expansion end parts of the pull rod into groove cavities of an upper pull rod clamping groove and a lower pull rod clamping groove from the open end of the clamping groove, wherein a movable gap can be reserved between the two expansion end parts of each pull rod and each cavity wall of the groove cavity clamped by the two expansion end parts;
and filling and sealing, namely filling a non-hydrophilic lubricant in the groove cavity of the draw bar clamping groove and sealing the groove cavity of the draw bar clamping groove into a sealing cavity.
2. The reinforcement retrofitting method according to claim 1, wherein said filling and sealing step comprises in sequence the steps of:
filling a non-hydrophilic lubricant into a groove cavity of the pull rod clamping groove by utilizing an opening of the pull rod clamping groove, and sealing the opening end of the clamping groove by utilizing a cover plate;
and then, a gap between the pull rod and the notch of the clamping groove is utilized to supplement non-hydrophilic lubricant to the groove cavity, and the water-stopping rubber strip is tightly plugged at the notch after the supplement is completed.
3. The reinforcement retrofitting method according to claim 2, characterized in that:
the water stopping rubber strip comprises a sealing plug body part and an outer connecting part, wherein the sealing plug body part is used for being plugged into a gap between the pull rod and the wall of the notch, and the outer connecting part is used for fixing; the outer connecting part is provided with an installation through hole;
and the end face of the notch of the draw-bar clamping groove is provided with a screw hole which is used for being matched with a screw passing through the mounting through hole so as to detachably fix the water stop rubber strip on the draw-bar clamping groove.
4. The reinforcement retrofitting method according to any of the claims 1 to 3, characterized in that:
and a wedge-shaped daughter board is padded between the nut and the outer board surface of the wedge-shaped mother board, and the outer board surface of the wedge-shaped daughter board is parallel to the surface of the side surface part fixed by the mother board.
5. The reinforcement retrofitting method according to claim 4, characterized in that:
the minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped mother plate is larger than a first preset distance;
the minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped sub-plate is larger than a second preset distance;
the wedge-shaped mother board and the wedge-shaped daughter board are both strip-shaped structures which are arranged in an extending way along the groove length direction of the pull rod clamping groove;
a plurality of pull rod clamping grooves are distributed on the strip-shaped wedge-shaped mother board.
6. The reinforcement retrofitting method according to any of the claims 1 to 5, characterized in that:
the extending direction of the notch of the draw bar clamping groove is arranged along the horizontal direction;
the projection of the pull rod on the vertical plane is arranged along the vertical direction.
7. The reinforcement retrofitting method according to any of the claims 1 to 6, characterized in that:
the pull rod is of a plate body structure;
the pull rod clamping groove is fixedly arranged on the outer plate surface of the wedge-shaped mother plate through welding;
the non-hydrophilic lubricant is petrolatum;
the draw-bar groove is an open groove structure with two open ends.
8. A single-column pier beam bridge comprises a pier, a main beam supported on the pier, and an anti-overturning device arranged between the single-column pier and the main beam; the anti-overturning devices are uniformly distributed on two sides of the single-column bridge pier; the method is characterized in that:
the anti-overturning device comprises an upper pull rod clamping groove component fixedly arranged on the side surface part of the main beam, a lower pull rod clamping groove component fixedly arranged on the side surface part of the pier, and a pull rod with two ends clamping end parts;
the pull rod clamping groove assembly comprises a wedge-shaped mother board provided with a mounting through hole and a pull rod clamping groove fixedly arranged on the outer board surface of the wedge-shaped mother board; the groove opening of the pull rod clamping groove is of a necking structure relative to the groove cavity, the groove length direction of the pull rod clamping groove is arranged along the direction parallel to the plate surface of the outer plate surface fixed by the pull rod clamping groove, and at least one end part of the pull rod clamping groove is an open end and is used for enabling the clamping end part to be detachably sleeved in the groove cavity; the cover plate is detachably arranged at the open end part of the clamping groove, movable gaps can be reserved between the clamping end part and each cavity wall of the groove cavity, and the groove cavity is filled with a non-hydrophilic lubricant.
9. The bridge girder bridge of a single pier as defined in claim 8, wherein:
the groove cavity of the pull rod clamping groove is sealed by a sealing structure to form a sealing cavity for filling the non-hydrophilic lubricant;
the outer plate surfaces of the wedge-shaped mother plates of the upper and lower pull rod clamping groove assemblies are arranged in a coplanar manner;
the pull rod clamping groove assembly comprises a water-stopping rubber strip for plugging a gap between the groove opening wall of the pull rod clamping groove and the pull rod;
the pull rod clamping groove assembly comprises a wedge-shaped daughter board provided with a mounting through hole and used for being padded on the outer board surface of the wedge-shaped mother board, and the outer board surface of the wedge-shaped daughter board is arranged in parallel with the inner board surface of the wedge-shaped mother board.
10. The bridge girder bridge of one pier according to claim 8 or 9, wherein:
the pull rod clamping groove is welded to the outer plate surface of the wedge-shaped mother plate;
the non-hydrophilic lubricant is petrolatum;
a plurality of pull rods are arranged between the upper pull rod clamping groove component and the lower pull rod clamping groove component;
the minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped mother plate is larger than a first preset distance;
the minimum distance between the inner plate surface and the outer plate surface of the wedge-shaped daughter board is larger than a second preset distance;
the pull rod clamping groove is of an open groove structure with two open ends;
the pull rod is of a plate body structure;
the clamping end part is an expansion end part which expands outwards relative to the pull rod body.
CN201911376382.7A 2019-12-27 2019-12-27 Single-column type bridge pier beam bridge and reinforcing and modifying method thereof Pending CN111005308A (en)

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CN201911376382.7A CN111005308A (en) 2019-12-27 2019-12-27 Single-column type bridge pier beam bridge and reinforcing and modifying method thereof

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CN111005308A true CN111005308A (en) 2020-04-14

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