CN111910537A - Space truss reinforcing system of bridge double-limb pier - Google Patents

Space truss reinforcing system of bridge double-limb pier Download PDF

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Publication number
CN111910537A
CN111910537A CN202010887880.4A CN202010887880A CN111910537A CN 111910537 A CN111910537 A CN 111910537A CN 202010887880 A CN202010887880 A CN 202010887880A CN 111910537 A CN111910537 A CN 111910537A
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China
Prior art keywords
pier
vertical
reinforcement
rod
anchor
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CN202010887880.4A
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CN111910537B (en
Inventor
刘伟
智树丽
李娟�
都建民
邱世川
索静兰
秦俊辉
苏云宾
曹龙
孙燕军
姜嫄
何学奇
董启冬
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Henan Zhenghang Construction Engineering Co ltd
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Henan Zhenghang Construction Engineering Co ltd
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Priority to CN202010887880.4A priority Critical patent/CN111910537B/en
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    • 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
    • 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

Abstract

The invention provides a space truss reinforcement system of a bridge double-limb pier, which is characterized in that a U-shaped hoop is arranged on a pier, and a first connecting beam, a second connecting beam, a third connecting beam, a first vertical beam, a second vertical beam, a third vertical beam, a first oblique beam and a second oblique beam are sequentially arranged through the hoop, so that the space truss system is formed in space; through setting up the anchor steel sheet and connecting rod from top to bottom, realize the atress rational distribution and the shift of first tie-beam and third tie-beam, improved the reinforcement effect and the atress performance of two limb mounds, the structure is convenient for be under construction.

Description

Space truss reinforcing system of bridge double-limb pier
Technical Field
The invention relates to the field of bridge engineering, in particular to a space truss reinforcing system of a bridge double-limb pier.
Background
For bridge engineering, in order to improve the performance of bearing upper load of a bridge structure, double-limb piers are often built, and the double-limb piers have better stress performance compared with single-column piers, but certain overturning force is easily generated due to the fact that a certain distance is reserved between the two piers of the double-limb piers, and therefore a corresponding reinforcing system needs to be arranged in the double-limb piers.
The existing double-limb pier reinforcing system mostly adopts a connecting tie beam, the tie beam is used for bearing the acting force between the double-limb piers, the stress performance of the tie beam is not high due to the fact that the stress of the tie beam is the stress of a rod piece, the height characteristic of the double-limb pier cannot be fully exerted, the stress effect is general, and a tie beam structure with a larger cross section is generally needed.
The simple tie beam structure is single in stress, and stress surfaces of the tie beam structure are mostly positioned on the same plane, so that stress is concentrated after reinforcement, and local damage of a reinforcement system is formed; although some reinforcing systems adopt a prestressed structure, the position of the prestressed structure is determined, and various prestressed structures cannot be combined, for example, combinations of tensile stress or compressive stress at different positions are realized, so that the prestressed reinforcing efficiency is limited, and corresponding adjustment cannot be performed according to actual engineering conditions.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a space truss reinforcing system for a bridge double-limb pier.
The invention provides a space truss reinforcing system of a bridge double-limb pier, wherein the bridge double-limb pier comprises a first pier and a second pier, the first pier and the second pier are spaced at a certain distance, and the reinforcing system is positioned between the first pier and the second pier, and is characterized in that: the reinforcement system comprises a first connecting beam, a second connecting beam, a third connecting beam, a first vertical beam, a second vertical beam, a third vertical beam, a first oblique beam and a second oblique beam, wherein the first connecting beam, the second connecting beam and the third connecting beam are sequentially arranged in height, namely the second connecting beam is higher than the first connecting beam, the third connecting beam is higher than the second connecting beam, the projections of the first connecting beam, the second connecting beam and the third connecting beam in the horizontal direction are sequentially staggered, namely the horizontal projection of the second connecting beam is positioned behind the first connecting beam, the horizontal projection of the third connecting beam is positioned behind the second connecting beam, so that the first connecting beam, the second connecting beam and the third connecting beam which are spatially staggered in sequence are formed, the first vertical beam is connected with the third connecting beam and the second connecting beam, the second vertical beam is connected with the third connecting beam, the second connecting beam and the first connecting beam, the third vertical beam is connected with the second connecting beam and the first connecting beam, the first sloping beam is connected with the first vertical beam and the second vertical beam, the upper end of the first sloping beam is connected with the intersection point of the first vertical beam and the third connecting beam, the lower end of the first sloping beam is connected with the intersection point of the second vertical beam and the first connecting beam, the second sloping beam is connected with the second vertical beam and the third vertical beam, the upper end of the second sloping beam is connected with the intersection point of the third connecting beam and the second vertical beam, the lower end of the second sloping beam is connected with the intersection point of the first connecting beam and the third vertical beam, and the first vertical beam, the second connecting beam, the third connecting beam and the first vertical beam, the second vertical beam, the third vertical beam, the first sloping beam, The first oblique beam, the second oblique beam and the third connecting beam are respectively fixedly connected with a first pier and a second pier, U-shaped hoops are respectively arranged on the outer sides of the first pier and the second pier, and the first connecting beam, the second connecting beam and the third connecting beam respectively penetrate through two limbs of the U-shaped hoops and pier bodies and are fixed on one limb on the outer side of the U-shaped hoops through anchoring ends;
all be provided with anchor reinforcement system on first pier and the second pier, anchor reinforcement system is including going deep into last connecting reinforcement and lower connecting reinforcement in the pier, it is located second tie-beam upper portion to go up the connecting reinforcement, lower connecting reinforcement is located the second tie-beam lower part, go up the connecting reinforcement with the inside anchor section that forms of pier is all gone deep into to the one end of connecting reinforcement down, go up the other end of connecting reinforcement and lower connecting reinforcement and all stretch out pier and fixed connection anchor steel sheet, be provided with connecting rod and lower connecting rod on the anchor steel sheet respectively, wherein go up connecting rod one end and connect the anchor steel sheet, the other end is connected the third tie-beam, lower connecting rod one end is connected the anchor steel sheet, the other end is connected first tie-beam, go up the connecting rod with the lower connecting rod about the second tie-beam symmetry sets up.
Preferably, the upper connecting rod and the lower connecting rod are both threaded connecting rods, and the length of each threaded connecting rod can be adjusted so as to apply prestress to the space truss system; the anchor steel sheet with the laminating of U-shaped staple bolt is connected, through fixing bolt realize the anchor steel sheet with the connection of U-shaped staple bolt, the anchor steel sheet is provided with first screw hole, be provided with on the U-shaped staple bolt of second tie-beam with first screw hole complex second screw hole, fixing bolt passes first screw hole and second screw hole after-fixing in the pier, be provided with first unable adjustment base on the anchor steel sheet, first tie-beam with be provided with second unable adjustment base on the second tie-beam, the one end of going up connecting rod and lower connecting rod is fixed on first unable adjustment base, go up the connecting rod with the other end of connecting rod is fixed under on the second unable adjustment base.
Preferably, the first connecting beam, the second connecting beam, the third connecting beam, the first vertical beam, the second vertical beam, the third vertical beam, the first oblique beam and the second oblique beam can be selected to be steel structural beams.
Preferably, the U-shaped hoop is a steel template matched with the bridge pier, is maintained and used as a template during concrete pouring of the bridge pier, is not detached after pouring, two limbs of the U-shaped hoop are respectively provided with the through holes matched with the first connecting beam, the second connecting beam and the third connecting beam, and the first connecting beam, the second connecting beam and the third connecting beam are fixed on the reinforcement cage of the bridge pier before concrete pouring of the bridge pier and are fixedly connected with the reinforcements on the reinforcement cage of the bridge pier.
Preferably, the anchoring end of the U-shaped hoop of the first pier is an anchoring fixed end, the anchoring end of the U-shaped hoop of the second pier is an anchoring tensile end, and the first connecting beam, the second connecting beam and the third connecting beam can be subjected to prestress tensile by the aid of the anchoring tensile end matched with a tensioning device, so that a prestress space truss reinforcing system is formed.
The working principle of the invention is as follows:
the traditional double-limb pier reinforcement is improved, a first connecting beam, a second connecting beam and a third connecting beam which are arranged in a staggered mode in height and horizontal plane are arranged, then a first vertical beam, a second vertical beam, a third vertical beam, a first oblique beam and a second oblique beam are arranged to form a space truss system, wherein the second vertical beam is fixedly connected with the first connecting beam, the second connecting beam and the third connecting beam respectively to form an integral main force transmission point, the first oblique beam and the second oblique beam are connected with the connecting beam and the vertical beam respectively to form a space integral force system, and the stress performance of the space integral force system is better compared with that of a general plane truss system;
connecting reinforcing steel bars are arranged in the bridge pier to form an anchoring end, then, an anchoring steel plate is fixed through the connecting reinforcing steel bars, the anchoring steel plate serves as an anchoring stress end and is connected with the first connecting beam and the second connecting beam through connecting rods respectively, stress of the first connecting beam and the second connecting beam is transmitted to the anchoring steel plate, and the anchoring steel plate serves as a balance stress member to offset upper and lower unbalanced forces; because the anchoring steel plate is stressed greatly, a thicker steel plate structure can be selected; the anchoring steel plate is connected with the U-shaped hoop, and the U-shaped hoop is connected with the second connecting beam, so that the anchoring steel plate is connected with the second connecting beam; the anchoring steel plate can be selected to be of an integral plate-shaped structure, and a connecting hole through which the second connecting beam penetrates is reserved, so that integral fixed connection of the structure is achieved.
The U-shaped hoop is used as an anchoring part of the connecting beam, so that the integral anchoring of the connecting beam and the pier body is realized, the anchoring effect is improved, particularly, the anchoring end and the tensioning end are utilized to form a connecting beam truss system capable of being tensioned, the stress performance of the space truss system is improved, the prestress tensioning can be carried out as required, then, a prestress tensioning structure system is formed, and the integral stress of the space truss system is improved.
By utilizing the construction, an statically indeterminate truss space stress system can be constructed, the phenomenon of concentrated damage of local stress during traditional reinforcement is avoided, the prestress reinforcement technology is adopted, the application positions and the application combinations of different prestress are convenient to adjust, for example, the combination of tensile stress or compressive stress is respectively adopted, the space stress is transferred and offset, different reinforcement working conditions are adapted, and the structural stress performance is improved.
The invention has the advantages that:
the invention provides a space truss reinforcement system of a bridge double-limb pier, which is characterized in that a U-shaped hoop is arranged on a bridge pier, and a first connecting beam, a second connecting beam, a third connecting beam, a first vertical beam, a second vertical beam, a third vertical beam, a first oblique beam and a second oblique beam are sequentially arranged through the hoop, so that the space truss system is formed in space; through setting up the anchor steel sheet and connecting rod from top to bottom, realize the atress rational distribution and the shift of first tie-beam and third tie-beam, improved the reinforcement effect and the atress performance of two limb mounds, the structure is convenient for be under construction.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection between a connection beam and a pier;
FIG. 3 is a schematic view of a space truss structure;
FIG. 4 is a schematic view of a U-shaped hoop;
FIG. 5 is a schematic view of an anchoring reinforcement architecture;
fig. 6 is a schematic view of the upper connecting rod fixing.
The specific implementation mode is as follows: the structure defined in the present invention will be explained in detail with reference to the drawings attached to the specification.
The invention provides a space truss reinforcing system of a bridge double-limb pier, wherein the bridge double-limb pier comprises a first pier 1 and a second pier 2, the first pier 1 and the second pier 2 are separated by a certain distance, and the reinforcing system is positioned between the first pier 1 and the second pier 2, and is characterized in that: the reinforcing system comprises a first connecting beam 3, a second connecting beam 4, a third connecting beam 5, a first vertical beam 6, a second vertical beam 7, a third vertical beam 8, a first oblique beam 9 and a second oblique beam 10, wherein the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5 are sequentially arranged in height, namely the second connecting beam 4 is higher than the first connecting beam 3, the third connecting beam 5 is higher than the second connecting beam 4, the projections of the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5 in the horizontal direction are sequentially staggered, namely the horizontal projection of the second connecting beam 4 is positioned behind the first connecting beam 3, the horizontal projection of the third connecting beam 5 is positioned behind the second connecting beam 4, so that the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5 which are spatially distributed in sequence are formed, the first vertical beam 6 is connected to the third connecting beam 5 and the second connecting beam 4, the second vertical beam 7 is connected to the third connecting beam 5 and the second connecting beam 4 and the first connecting beam 3, the third vertical beam 8 is connected to the second connecting beam 4 and the first connecting beam 3, the first oblique beam 9 is connected to the first vertical beam 6 and the second vertical beam 7, the upper end of the first oblique beam 9 is connected to the intersection of the first vertical beam 6 and the third connecting beam 5, the lower end of the first oblique beam 9 is connected to the intersection of the second vertical beam 7 and the first connecting beam 3, the second oblique beam 10 is connected to the second vertical beam 7 and the third vertical beam 8, the upper end of the second oblique beam 10 is connected to the intersection of the third connecting beam 5 and the second vertical beam 7, and the lower end of the second oblique beam 10 is connected to the intersection of the first connecting beam 3 and the third vertical beam 8, the first connecting beam 3, the second connecting beam 4, the third connecting beam 5, the first vertical beam 6, the second vertical beam 7, the third vertical beam 8, the first oblique beam 9 and the second oblique beam 10 form a space truss system, the reinforcing effect of the structure is improved, the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5 are fixedly connected with the first pier 1 and the second pier 2 respectively, U-shaped hoops 11 are arranged on the outer sides of the first pier 1 and the second pier 2 respectively, and the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5 penetrate through two limbs of the U-shaped hoops 11 and pier bodies respectively and are fixed on one limb outside the U-shaped hoops 11 through anchoring ends 12;
the first pier 1 and the second pier 2 are both provided with anchoring and reinforcing systems, the anchoring and reinforcing systems comprise upper connecting reinforcing steel bars 13 and lower connecting reinforcing steel bars 14 which are deep into the piers, the upper connecting reinforcement 13 is positioned at the upper portion of the second connecting beam 4, the lower connecting reinforcement 14 is positioned at the lower portion of the second connecting beam 4, one ends of the upper connecting rebars 13 and the lower connecting rebars 14 are inserted into the interior of the pier to form anchoring sections, the other ends of the upper connecting steel bar 13 and the lower connecting steel bar 14 extend out of the pier and are fixedly connected with an anchoring steel plate 15, the anchoring steel plate is respectively provided with an upper connecting rod 16 and a lower connecting rod 17, wherein one end of the upper connecting rod 16 is connected with the anchoring steel plate 15, the other end is connected with the third connecting beam 5, one end of the lower connecting rod 17 is connected with the anchoring steel plate 15, the other end is connected with the first connecting beam 3, the upper connecting rod 16 and the lower connecting rod 17 are symmetrically arranged with respect to the second connecting beam 4.
Preferably, the upper connecting rod 16 and the lower connecting rod 17 are both threaded connecting rods, and the length of each threaded connecting rod can be adjusted so as to apply prestress to the space truss system; the anchor steel sheet 15 with the laminating of U-shaped staple bolt 11 is connected, realize anchor steel sheet 15 with the connection of U-shaped staple bolt 11 through fixing bolt, anchor steel sheet 15 is provided with first screw hole, be provided with on the U-shaped staple bolt 11 of second tie-beam with first screw hole complex second screw hole, fixing bolt passes first screw hole and second screw hole after-fixing in the pier, be provided with first unable adjustment base 18 on the anchor steel sheet 15, first tie-beam with be provided with second unable adjustment base 19 on the second tie-beam, the one end of going up connecting rod 16 and lower connecting rod 17 is fixed on first unable adjustment base 18, go up connecting rod 16 with the other end of connecting rod 17 is fixed under on the second unable adjustment base 19.
Preferably, the first connecting beam 3, the second connecting beam 4, the third connecting beam 5, the first vertical beam 6, the second vertical beam 7, the third vertical beam 8, the first oblique beam 9 and the second oblique beam 10 may be steel structural beams.
Preferably, the U-shaped hoop 11 is a steel formwork matched with the bridge pier, is maintained as a formwork for use during concrete pouring of the bridge pier, and is not disassembled after the pouring is completed, the two limbs of the U-shaped hoop 11 are respectively provided with the through holes matched with the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5, and the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5 are fixed on the reinforcement cage of the bridge pier before the concrete pouring of the bridge pier and are fixedly connected with the reinforcement on the reinforcement cage of the bridge pier.
Preferably, the anchoring end 12 of the U-shaped hoop 11 of the first pier 1 is an anchoring fixed end, the anchoring end 12 of the U-shaped hoop 11 of the second pier 2 is an anchoring tensile end, and the first connecting beam 3, the second connecting beam 4 and the third connecting beam 5 can be subjected to prestress tensile by using the anchoring tensile end matched with a tensioning device, so that a prestress space truss reinforcing system is formed.
The above-described embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be construed as being limited to the specific forms set forth in the examples, but also includes equivalent technical means which can be conceived by those skilled in the art from the present inventive concept.

Claims (5)

1. The utility model provides a space truss reinforcement system of bridge double limb mound, bridge double limb mound includes first pier and second pier, first pier and second pier interval certain distance, the reinforcement system is located between first pier and the second pier, its characterized in that: the reinforcement system comprises a first connecting beam, a second connecting beam, a third connecting beam, a first vertical beam, a second vertical beam, a third vertical beam, a first oblique beam and a second oblique beam, wherein the first connecting beam, the second connecting beam and the third connecting beam are sequentially arranged in height, namely the second connecting beam is higher than the first connecting beam, the third connecting beam is higher than the second connecting beam, the projections of the first connecting beam, the second connecting beam and the third connecting beam in the horizontal direction are sequentially staggered, namely the horizontal projection of the second connecting beam is positioned behind the first connecting beam, the horizontal projection of the third connecting beam is positioned behind the second connecting beam, so that the first connecting beam, the second connecting beam and the third connecting beam which are spatially staggered in sequence are formed, the first vertical beam is connected with the third connecting beam and the second connecting beam, the second vertical beam is connected with the third connecting beam, the second connecting beam and the first connecting beam, the third vertical beam is connected with the second connecting beam and the first connecting beam, the first sloping beam is connected with the first vertical beam and the second vertical beam, the upper end of the first sloping beam is connected with the intersection point of the first vertical beam and the third connecting beam, the lower end of the first sloping beam is connected with the intersection point of the second vertical beam and the first connecting beam, the second sloping beam is connected with the second vertical beam and the third vertical beam, the upper end of the second sloping beam is connected with the intersection point of the third connecting beam and the second vertical beam, the lower end of the second sloping beam is connected with the intersection point of the first connecting beam and the third vertical beam, and the first vertical beam, the second connecting beam, the third connecting beam and the first vertical beam, the second vertical beam, the third vertical beam, the first sloping beam, The first oblique beam, the second oblique beam and the third connecting beam are respectively fixedly connected with a first pier and a second pier, U-shaped hoops are respectively arranged on the outer sides of the first pier and the second pier, and the first connecting beam, the second connecting beam and the third connecting beam respectively penetrate through two limbs of the U-shaped hoops and pier bodies and are fixed on one limb on the outer side of the U-shaped hoops through anchoring ends;
all be provided with anchor reinforcement system on first pier and the second pier, anchor reinforcement system is including going deep into last connecting reinforcement and lower connecting reinforcement in the pier, it is located second tie-beam upper portion to go up the connecting reinforcement, lower connecting reinforcement is located the second tie-beam lower part, go up the connecting reinforcement with the inside anchor section that forms of pier is all gone deep into to the one end of connecting reinforcement down, go up the other end of connecting reinforcement and lower connecting reinforcement and all stretch out pier and fixed connection anchor steel sheet, be provided with connecting rod and lower connecting rod on the anchor steel sheet respectively, wherein go up connecting rod one end and connect the anchor steel sheet, the other end is connected the third tie-beam, lower connecting rod one end is connected the anchor steel sheet, the other end is connected first tie-beam, go up the connecting rod with the lower connecting rod about the second tie-beam symmetry sets up.
2. The space truss reinforcement system for a bridge double-limb pier of claim 1, wherein: the upper connecting rod and the lower connecting rod are both threaded connecting rods, and the length of each threaded connecting rod can be adjusted so as to apply prestress to the space truss system; the anchor steel sheet with the laminating of U-shaped staple bolt is connected, through fixing bolt realize the anchor steel sheet with the connection of U-shaped staple bolt, the anchor steel sheet is provided with first screw hole, be provided with on the U-shaped staple bolt of second tie-beam with first screw hole complex second screw hole, fixing bolt passes first screw hole and second screw hole after-fixing in the pier, be provided with first unable adjustment base on the anchor steel sheet, first tie-beam with be provided with second unable adjustment base on the second tie-beam, the one end of going up connecting rod and lower connecting rod is fixed on first unable adjustment base, go up the connecting rod with the other end of connecting rod is fixed under on the second unable adjustment base.
3. The space truss reinforcement system for a bridge double-limb pier of claim 1, wherein: the first connecting beam, the second connecting beam, the third connecting beam, the first vertical beam, the second vertical beam, the third vertical beam, the first oblique beam and the second oblique beam can be selected to be steel structure beams.
4. The space truss reinforcement system for a bridge double limb pier of claim 2, wherein: the U-shaped hoop is a steel template matched with the bridge pier, is maintained and used as a template when concrete pouring of the bridge pier, is not dismantled after pouring is finished, two limbs of the U-shaped hoop are respectively provided with the through holes matched with the first connecting beam, the second connecting beam and the third connecting beam, and the first connecting beam, the second connecting beam and the third connecting beam are fixed on a reinforcement cage of the bridge pier before concrete pouring of the bridge pier and are fixedly connected with steel bars on the reinforcement cage of the bridge pier.
5. The space truss reinforcement system for a bridge double limb pier of claim 3, wherein: the anchor end of the U-shaped hoop of the first pier is an anchor fixed end, the anchor end of the U-shaped hoop of the second pier is an anchor tensioning end, and the anchor tensioning end is matched with a tensioning device and can be used for carrying out prestress tensioning on the first connecting beam, the second connecting beam and the third connecting beam, so that a prestress space truss reinforcing system is formed.
CN202010887880.4A 2020-08-28 2020-08-28 Space truss reinforcing system of bridge double-limb pier Active CN111910537B (en)

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CN105350446A (en) * 2015-11-11 2016-02-24 中铁大桥局武汉桥梁特种技术有限公司 Combined highway and railway bridge isolation shed frame and mounting method of wedge-shaped liners
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CN210134357U (en) * 2019-05-12 2020-03-10 中交路桥建设有限公司 Pi-shaped bracket for construction of upper cross beam of H-shaped cable tower
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