CN113073555B - Pier top block positioning system and construction method thereof - Google Patents
Pier top block positioning system and construction method thereof Download PDFInfo
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- CN113073555B CN113073555B CN202110298365.7A CN202110298365A CN113073555B CN 113073555 B CN113073555 B CN 113073555B CN 202110298365 A CN202110298365 A CN 202110298365A CN 113073555 B CN113073555 B CN 113073555B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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Abstract
The invention relates to a pier top block positioning system and a construction method thereof, wherein the pier top block positioning system comprises the following steps: the pier top block to be installed is placed above the pier body; the transverse limiting brackets are fixed at the top of the pier body and are arranged on two opposite sides of the pier top block along the transverse bridge direction; vertical stop device, it includes: one end of the opposite pulling device is connected with an anchoring point of the erected beam section or an anchoring point of the temporary pier, and the other end of the opposite pulling device is connected with the pier top block to be installed; one end of the longitudinal support abuts against the erected beam section or the temporary pier, and the other end of the longitudinal support abuts against the pier top block; and the lower end of the vertical suspender is fixed with the pier top block. The pier top block positioning system and the construction method thereof can restrain the pier top block in the transverse direction, the longitudinal direction and the vertical direction, can ensure that the pier top block has smaller swing amplitude during installation, are easy to control the precision and are not easy to deviate.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a pier top block positioning system and a construction method thereof.
Background
At present, the short-line matching method prefabrication and assembly technology is popularized and applied in the construction of the upper part structure of the bridge in China due to the characteristics of high efficiency, strong adaptability and the like of the construction, but is basically applied to the construction of continuous bridges and lacks of related experience in simply supported bridges. The pier top block construction in the continuous beam bridge mostly adopts a construction method of cast-in-place and pier top consolidation, and the pier top block before the section simply supported beam becomes the beam cannot be consolidated with the pier top first, so that the positioning of the pier top block is difficult.
In the related art, in the connection line project of the bridge of the Bengal Pastema, the simply supported box girder is constructed by adopting a stub matching method. Generally, the temporary positioning of the pier top block is adjusted by hoisting of a bridge girder erection machine, after the positioning is finished, the bottom of the pier top block is supported by a three-way jack, a hoisting tool is additionally arranged to hoist the pier top block to a main girder of the bridge girder erection machine, and the method for positioning and hoisting point conversion is finished.
However, the method has the defects that the overhead crane of the bridge girder erection machine has large swing amplitude, the precision is difficult to control, and the measurement and positioning of the subsequent segment construction are seriously influenced due to the fact that deviation is easy to occur in the subsequent construction process due to lack of constraint.
Therefore, there is a need for a new pier top block positioning system and a construction method thereof to overcome the above problems.
Disclosure of Invention
The embodiment of the invention provides a pier top block positioning system and a construction method thereof, and aims to solve the problems that in the related art, the swing amplitude of a pier top block for hoisting and adjusting a bridge girder erection machine crown block is large, the precision is difficult to control, and the measurement positioning of the subsequent segment construction is seriously influenced because deviation is easy to occur in the subsequent construction process due to lack of constraint.
In a first aspect, a pier top block positioning system is provided, comprising: the pier comprises a pier body, wherein a pier top block to be installed is placed above the pier body; the transverse limiting brackets are fixed at the top of the pier body and are arranged on two opposite sides of the pier top block along the transverse bridge direction; vertical stop device, it includes: one end of the opposite pulling device is connected with an anchoring point of the erected beam section or an anchoring point of the temporary pier, and the other end of the opposite pulling device is connected with the pier top block to be installed; one end of the longitudinal support abuts against the erected beam section or the temporary pier, and the other end of the longitudinal support abuts against the pier top block; and the lower end of the vertical suspender is fixed with the pier top block.
In some embodiments, a support base stone is arranged at the top of the pier body; horizontal spacing support includes: the at least two cross beams are arranged on two opposite sides of the support base cushion; the pull rod is connected with the cross beams on two sides of each support cushion stone and fixes the cross beams and the support cushion stones; and a side rod for transversely limiting the pier top block and fixed with the cross beam.
In some embodiments, a sheet steel is padded between the side bars and the pier top blocks.
In some embodiments, the opposite pulling device comprises at least two steel cables, one end of each steel cable is connected with the erected beam segment anchoring point or the temporary pier anchoring point through a chain block, the other end of each steel cable is connected with the pier top block to be installed, and the two steel cables are arranged to cross each other.
In some embodiments, the block positioning system further comprises a jack disposed at the top of the pier body, the jack supported on the bottom surface of the block.
In a second aspect, a construction method of the pier top block positioning system is provided, which includes the following steps: the transverse limiting brackets are respectively arranged on two opposite sides of the top of the pier body; hoisting the pier top block to be installed to a preset transverse position above the pier body, and tightly grabbing the pier top block and the transverse limiting bracket by using a steel plate; adjusting the longitudinal position of the pier top block by using the longitudinal limiting device until the pier top block reaches the designed longitudinal position; and installing the vertical suspender on the pier top block to finish vertical positioning.
In some embodiments, said adjusting the longitudinal position of said crown block using said longitudinal stop device until said crown block reaches a design longitudinal position comprises: and supporting the longitudinal support between the pier top block and the erected beam section or the temporary pier, and simultaneously connecting and oppositely pulling the pier top block and the erected beam section anchoring point or the temporary pier anchoring point by using the oppositely pulling device until the pier top block reaches a designed longitudinal position.
In some embodiments, said mounting said vertical boom to said pier top block comprises: and installing the vertical suspender in the embedded hoisting point hole of the pier top block through a nut, and slightly loosening a bridge girder erection machine crown block for hoisting the pier top block to ensure that the weight of the pier top block is completely born by the vertical suspender.
In some embodiments, the pier body top is further provided with a jack, and after the vertical suspension rod is mounted on the pier top block and vertical positioning is completed, the method further includes: the transverse, longitudinal and vertical positions of the pier top block are retested, and further adjustment is carried out until the position of the pier top block meets the standard; and jacking the jack to enable the jack to be supported on the bottom surface of the pier top block.
In some embodiments, the bottom of the pier top block is provided with a permanent support, the top of the pier body is provided with a support cushion stone, and the support cushion stone is provided with a mounting hole for accommodating the support leg of the support cushion stone; after the vertical suspender is installed on the pier top block and vertical positioning is completed, the method further comprises the following steps: and (3) removing the transverse limiting support, the longitudinal limiting device and the vertical suspender after tensioning the prestress of the pier top block, and grouting the mounting hole.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a pier top block positioning system and a construction method thereof, wherein a transverse limiting device, a longitudinal limiting device and a vertical suspender are arranged at the top of a pier body, the transverse limiting device can limit the transverse position of the pier top block at two opposite sides of the pier top block, the longitudinal limiting device comprises a pulling device and a longitudinal support, the longitudinal support can be supported between the pier top block and an erected beam section or a temporary pier to limit the pier top block to move towards the direction close to the erected beam section or the temporary pier, one end of the pulling device is connected with the pier top block, the other end of the pulling device is connected with the erected beam section or the temporary pier, the pier top block can be limited to move towards the direction far away from the erected beam section or the temporary pier through the pulling device, so as to limit the pier top block in the longitudinal direction, and meanwhile, the vertical suspender fixed with the pier top block is arranged, the vertical suspender can position the pier top block, therefore, the pier top blocks are restrained in the transverse direction, the longitudinal direction and the vertical direction, so that the pier top blocks can be guaranteed to have small swing amplitude during installation, the precision is easy to control, and deviation is not easy to occur.
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 top view of a pier body of a pier top block positioning system according to an embodiment of the present invention;
FIG. 2 is a schematic front view of a pier top block positioning system according to an embodiment of the invention;
fig. 3 is a schematic right-view of a pier top block positioning system according to an embodiment of the invention;
fig. 4 is a schematic top view of a pier top block positioning system according to an embodiment of the present invention.
In the figure:
1. a pier body; 11. a support base cushion stone;
2. a pier top block; 21. hoisting a hole; 22. pre-burying a hole; 23. balancing the balance weight; 24. a permanent support;
3. erecting a beam section; 31. erecting beam section anchoring points;
4. a transverse limiting bracket; 41. a cross beam; 42. a pull rod; 43. a side lever; 44. a steel plate;
5. a longitudinal position limiting device; 51. a counter-pulling device; 511. a wire rope; 52. longitudinal support;
6. a vertical boom; 61. a nut;
7. a jack.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a pier top block positioning system and a construction method thereof, which can solve the problems that in the related art, the swing amplitude of a pier top block is large when a bridge girder erection machine crown block is hoisted and adjusted, the precision is difficult to control, and the measurement positioning of the subsequent segment construction is seriously influenced because deviation is easy to occur in the subsequent construction process due to lack of constraint.
Referring to fig. 2 and 4, a pier top block positioning system provided for an embodiment of the present invention may include: in the embodiment, before the pier top block 2 is installed, an erected beam section 3 or a temporary pier is installed on one side of the top of the pier body 1, the erected beam section 3 is provided with an erected beam section anchoring point 31, and the temporary pier is provided with a temporary pier anchoring point; the transverse limiting brackets 4 can be fixed at the top of the pier body 1 and are arranged at two opposite sides of the pier top block 2 along the transverse bridge direction to limit the transverse position of the pier top block 2, and in the embodiment, two transverse limiting brackets 4 are arranged; longitudinal stop means 5, which may comprise: one end of the opposite pulling device 51 can be connected with the erected beam section anchoring point 31 or the temporary pier anchoring point, and the other end of the opposite pulling device 51 can be connected with the pier top block 2 to be installed, so that the pier top block 2 is limited to move towards the direction far away from the erected beam section 3 or the temporary pier; the longitudinal supports 52 are profile steels in the embodiment, one end of each longitudinal support 52 can abut against the erected beam section 3 or the temporary pier, and the other end of each longitudinal support 52 can abut against the pier top block 2 so as to limit the pier top block 2 to move towards the direction close to the erected beam section 3 or the temporary pier; and the lower end of the vertical suspender 6 used for vertically limiting the pier top block 2 can be fixed with the pier top block 2, so that the pier top block 2 is restrained horizontally, vertically and vertically, and the accurate positioning of the pier top block 2 is ensured.
Referring to fig. 1, in some embodiments, the top of the pier body 1 may be provided with two support base cushion stones 11, in this embodiment, two symmetrical support base cushion stones 11 are provided corresponding to one pier top block 2 of the pier body 1; the lateral limit bracket 4 may include: at least two cross beams 41, which are arranged on two opposite sides of the support cushion 11, that is, one cross beam 41 is arranged on each of two opposite sides of each support cushion 11; the pull rod 42 is connected with the cross beams 41 on two sides of each support cushion 11 to fix the cross beams 41 and the support cushion 11, in the embodiment, the pull rod 42 preferably selects finish rolling threaded steel bars with the diameter of 25mm, and the two cross beams 41 are fixed in a counter-pulling mode; and a side lever 43 for laterally limiting the pier top block 2, which is fixed with the cross beam 41, in the embodiment, the side lever 43 extends out of the outer side of the pier body 1 and is welded and fixed with the cross beam 41, meanwhile, the side lever 43 is also positioned on the outer side of the pier top block 2 to limit the lateral displacement of the pier top block 2, and through the arrangement of the cross beam 41 and the pull rod 42, the lateral limiting support 4 can be firmly fixed with the support cushion stone 11 at the top of the pier body 1, so that the side lever 43 can be conveniently fixed.
Referring to fig. 2 and 3, further, a backing steel plate 44 can be arranged between the side rods 43 and the pier top block 2, that is, a gap can be reserved between the side rods 43 and the pier top block 2, so that the pier top block 2 can be conveniently installed between the two side rods 43 on both sides of the pier body 1, and then, the side rods 43 and the pier top block 2 can be tightly held by the backing steel plate 44, so that the pier top block 2 and the side rods 43 can be prevented from moving relatively.
Referring to fig. 4, in some embodiments, the counter-pulling device 51 may include at least two steel cables 511, one end of each steel cable 511 may be connected to the erected beam segment anchoring point 31 or the temporary pier anchoring point through an inverted chain, and the other end of each steel cable 511 is connected to the pre-buried hole 22 of the pier top block 2, by providing the inverted chain, the counter-pulling device 51 may have a telescopic function, so as to adjust the longitudinal displacement of the pier top block 2, and the two steel cables 511 may be arranged to intersect with each other, so that the connection between the pier top block 2 and the erected beam segment 3 or the temporary pier is more stable, and the acting force is greater when the steel cables 511 are counter-pulled, and at the same time, not only the pier top block 2 may be longitudinally limited, but also the transverse limiting function may be performed.
Referring to fig. 2, in this embodiment, the vertical suspension rod 6 preferably selects finish-rolled twisted steel with a diameter of 32mm, the pier top block 2 may be provided with a vertical hoisting point hole 21, and the vertical suspension rod 6 may pass through the hoisting point hole 21 and be fixed with the pier top block 2 through a nut 61, so as to meet the requirement of the hanging stress of the pier top block 2.
Referring to fig. 1, in some optional embodiments, the pier block positioning system may further include a jack 7 disposed at the top of the pier body 1, the jack 7 is supported on the bottom surface of the pier block 2, in this embodiment, the jack 7 is located between two support pads 11, and preferably a three-way jack 7, by providing the jack 7 on the bottom surface of the pier block 2, the jack 7 may be supported at the bottom of the pier block 2 while the top of the pier block 2 is suspended by the vertical suspension rod 6, which may further reduce the shaking that may be caused when the pier block 2 collides with the erected beam section 3 or the temporary pier during subsequent splicing.
Referring to fig. 1 to 4, a construction method of the pier top block positioning system provided for an embodiment of the invention may include the following steps:
step 1: the two opposite sides of the top of the pier body 1 are respectively provided with a transverse limiting bracket 4.
Referring to fig. 1, in some embodiments, before step 1, the transverse position-limiting bracket 4 may be manufactured, equipped with a counter-pulling device 51 and a longitudinal support 52, and a vertical suspension rod 6.
Referring to fig. 1, further, before step 1, lateral restraint brackets 4 may be installed on the support chocks 11 on top of the completed pier shaft 1.
And 2, step: and hoisting the pier top block 2 to be installed to a preset transverse position above the pier body 1, and tightly lifting the pier top block 2 and the transverse limiting bracket 4 by using a steel plate 44.
Referring to fig. 2, in some embodiments, prior to step 2, a balancing weight 23 may be installed above the pier top block 2 to be installed, a permanent support 24 may be installed at the bottom of the pier top block 2, and the pier top block 2 may be hung to the bridge girder crane.
Referring to fig. 2, further, the permanent support 24 may have a support leg, the support base stone 11 is provided with a mounting hole corresponding to the support leg, in step 2, the pier top block 2 is lifted above the pier body 1 by using a bridge erecting crane, the permanent support 24 is correspondingly mounted on the support base stone 11, the support leg of the permanent support 24 is inserted into the mounting hole, the pier top block 2 is adjusted to a preset transverse position by using the bridge erecting crane, and then the pier top block 2 and the transverse limiting bracket 4 are tightened and fixed by using a steel plate 44.
And step 3: the longitudinal position of the coping block 2 is adjusted using the longitudinal stop 5 until the coping block 2 reaches the designed longitudinal position.
Referring to fig. 4, in step 3, the adjusting the longitudinal position of the top block 2 using the longitudinal position limiter 5 until the top block 2 reaches the designed longitudinal position may include: the longitudinal support 52 is supported between the coping block 2 and the erected beam section 3 or the temporary pier to restrict the longitudinal movement of the coping block 2, and at the same time, the coping block 2 is connected and counterpressed to the erected beam section anchoring point 31 or the temporary pier anchoring point using the counterplan device 51 until the coping block 2 is adjusted to the designed longitudinal position.
And 4, step 4: and (3) installing the vertical suspender 6 on the pier top block 2 to complete vertical positioning.
Referring to fig. 2 to 4, further, in the present embodiment, step 2, step 3 and step 4 may be performed simultaneously.
Referring to fig. 2, in step 4, the mounting of the vertical suspension bar 6 to the pier top block 2 to complete the vertical positioning may include: on being fixed in the main truss of bridge girder erection machine with the one end of vertical jib 6, the other end of vertical jib 6 is installed in the pre-buried hoisting point hole 21 of mound kicking block 2 through nut 61 to the big hook of the bridge girder erection machine overhead traveling crane that will hoist mound kicking block 2 is loose a little, makes the weight of mound kicking block 2 bear by vertical jib 6 completely, accomplishes vertical positioning.
Referring to fig. 3, in some embodiments, the top of the pier body 1 is further provided with a jack 7, and after step 4, the method may further include: the transverse, longitudinal and vertical positions of the pier top block 2 are retested, and the position of the pier top block 2 is further adjusted by adopting the method until the position of the pier top block 2 meets the standard; and then, jacking the jack 7 to enable the jack 7 to be supported on the bottom surface of the pier top block 2, so that the shaking possibly caused when the pier top block 2 collides with the erected beam section 3 or the temporary pier during subsequent splicing is reduced.
In some optional embodiments, after step 4, the method may further include: splicing the pier top block 2 and the erected beam section 3 by glue, tensioning the pier top block 2 by prestress, removing the transverse limiting support 4, the longitudinal limiting device 5 and the vertical suspender 6, grouting an installation hole in the support cushion stone 11, completing system conversion, and removing the jack 7; the construction method can adjust the plane position and the preset elevation of the pier top block 2, so that the whole span position of the assembled pier top block 2 is ensured to be consistent with the design position, the accurate alignment of the pier top block 2 is ensured, and the construction precision and efficiency are improved.
The principle of the pier top block positioning system and the construction method thereof provided by the embodiment of the invention is as follows:
because the top of the pier body 1 is provided with the transverse limiting device, the longitudinal limiting device 5 and the vertical suspender 6, the transverse limiting device can limit the transverse position of the pier top block 2 at two opposite sides of the pier top block 2, the longitudinal limiting device 5 comprises a pulling device 51 and a longitudinal support 52, the longitudinal support 52 can be supported between the pier top block 2 and the erected beam section 3 or the temporary pier to limit the movement of the pier top block 2 to the direction close to the erected beam section 3 or the temporary pier, one end of the pulling device 51 is connected with the pier top block 2, the other end is connected with the erected beam section 3 or the temporary pier, the pulling device 51 can limit the movement of the pier top block 2 to the direction far away from the erected beam section 3 or the temporary pier so as to limit the pier top block 2 longitudinally, and simultaneously, because the vertical suspender 6 fixed with the pier top block 2 is arranged, the vertical suspender 6 can position the vertical position of the pier top block 2, therefore, the pier top blocks 2 are restrained in the transverse direction, the longitudinal direction and the vertical direction, the beam bottom elevation and the plane position deviation after the first section of the pier top blocks 2 are installed can meet the standard requirements, meanwhile, the pier top blocks 2 can be guaranteed to be small in swing amplitude during installation, the precision is easy to control, deviation is not easy to occur, and the pier top blocks are safe, reliable, simple to operate and high in construction efficiency.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A pier top block positioning system, comprising:
the pier comprises a pier body (1), wherein a pier top block (2) to be installed is placed above the pier body (1);
the transverse limiting brackets (4) are fixed at the top of the pier body (1) and are arranged on two opposite sides of the pier top block (2) along the transverse bridge direction;
longitudinal stop means (5) comprising: one end of the opposite pulling device (51) is connected with the erected beam section anchoring point (31) or the temporary pier anchoring point, and the other end of the opposite pulling device (51) is connected with the pier top block (2) to be installed; and a longitudinal support (52), one end of the longitudinal support (52) is abutted against the erected beam section (3) or the temporary pier, and the other end of the longitudinal support is abutted against the pier top block (2);
and the lower end of the vertical suspender (6) is fixed with the pier top block (2), one end of the vertical suspender (6) is fixed on a main truss of the bridge girder erection machine, so that the weight of the pier top block (2) is completely borne by the vertical suspender (6), and the vertical positioning is completed.
2. The pier top block positioning system of claim 1, wherein: a support base cushion stone (11) is arranged at the top of the pier body (1); the transverse limiting bracket (4) comprises:
at least two cross beams (41) arranged on two opposite sides of the support base stone (11);
the pull rod (42) is connected with the cross beam (41) on two sides of each support cushion stone (11) and fixes the cross beam (41) and the support cushion stone (11);
and a side rod (43) used for transversely limiting the pier top block (2) and fixed with the cross beam (41).
3. The pier top block positioning system of claim 2, wherein: and a sheet-padding steel plate (44) is arranged between the side rods (43) and the pier top block (2).
4. The pier top block positioning system of claim 1, wherein:
the opposite-pulling device (51) comprises at least two steel wire ropes (511), one ends of the steel wire ropes (511) are connected with the erected beam section anchoring points (31) or the temporary pier anchoring points through chain blocks, the other ends of the steel wire ropes (511) are connected with the pier top blocks (2) to be installed, and the two steel wire ropes (511) are arranged in a mutually crossed mode.
5. The pier top block positioning system of claim 1, wherein:
the pier top block positioning system further comprises a jack (7) arranged at the top of the pier body (1), and the jack (7) is supported on the bottom surface of the pier top block (2).
6. A method of constructing the pier top block positioning system of claim 1, comprising the steps of:
the transverse limiting brackets (4) are respectively arranged on two opposite sides of the top of the pier body (1);
hoisting the pier top block (2) to be installed to a preset transverse position above the pier body (1), and tightly grabbing the pier top block (2) and the transverse limiting bracket (4) by using a steel plate (44);
adjusting the longitudinal position of the pier top block (2) by using the longitudinal limiting device (5) until the pier top block (2) reaches a designed longitudinal position;
and (3) installing the vertical suspender (6) on the pier top block (2) to finish vertical positioning.
7. The construction method according to claim 6, wherein said adjusting the longitudinal position of the pier block (2) using the longitudinal position-limiting device (5) until the pier block (2) reaches a designed longitudinal position comprises:
-supporting the longitudinal support (52) between the pier top block (2) and the erected beam section (3) or temporary pier, while connecting and counter-pulling the pier top block (2) with the erected beam section anchoring point (31) or temporary pier anchoring point using the counter-pulling device (51) until the pier top block (2) reaches a designed longitudinal position.
8. The construction method according to claim 6, wherein said mounting of said vertical hanger bar (6) to said pier top block (2) comprises:
on being fixed in the main truss of bridge girder erection machine with the one end of vertical jib (6), will the other end of vertical jib (6) pass through nut (61) install in pre-buried hoisting point hole (21) of mound kicking block (2), and will hoist the bridge girder erection machine overhead crane of mound kicking block (2) is loose a little, makes the weight of mound kicking block (2) is by vertical jib (6) bear completely.
9. The construction method according to claim 6, wherein a jack (7) is further arranged at the top of the pier body (1), and after the vertical suspension rod (6) is installed on the pier top block (2) and vertical positioning is completed, the method further comprises the following steps:
the transverse, longitudinal and vertical positions of the pier top block (2) are retested, and further adjustment is carried out until the position of the pier top block (2) meets the standard;
and jacking the jack (7) to enable the jack (7) to be supported on the bottom surface of the pier top block (2).
10. The construction method according to claim 6, wherein the bottom of the pier top block (2) is provided with a permanent support (24), the top of the pier body (1) is provided with a support cushion stone (11), and the support cushion stone (11) is provided with a mounting hole for accommodating the support leg of the support cushion stone (11); after the vertical suspension rod (6) is installed on the pier top block (2) and the vertical positioning is completed, the method further comprises the following steps:
and (3) disassembling the transverse limiting support (4), the longitudinal limiting device (5) and the vertical suspender (6) after the pier jacking block (2) is tensioned and prestressed, and grouting the mounting hole.
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| JP3837888B2 (en) * | 1997-12-16 | 2006-10-25 | 石川島播磨重工業株式会社 | Bridge girder continuous feeding device |
| CN101033604A (en) * | 2006-03-08 | 2007-09-12 | 上海市基础工程公司 | Accurate installation process for oversea bridge binding beam 0# section |
| CN101200878A (en) * | 2007-12-28 | 2008-06-18 | 中铁四局集团第五工程有限公司 | Continuous girder frusta top segment precisely locating apparatus and precisely locating construction technique thereof |
| CN104452597B (en) * | 2014-11-25 | 2016-06-29 | 中建六局第三建筑工程有限公司 | Pier prestressed cap beam with extra length Construction Supporting System in water |
| CN104652286B (en) * | 2015-02-03 | 2017-02-01 | 中交第二航务工程局有限公司 | Pier top position regulating system for large-span steel truss arch bridge side pier and construction method |
| CN105544405A (en) * | 2016-01-25 | 2016-05-04 | 中交二公局第一工程有限公司 | Construction method for erecting and installing bridge pier top block by adopting floating crane |
| CN206784190U (en) * | 2017-06-09 | 2017-12-22 | 中铁建大桥工程局集团第五工程有限公司 | Large-span Steel Box Beam liftable self-propelled successively incremeantal launching method system |
| CN108345318A (en) * | 2018-02-07 | 2018-07-31 | 中交公局第二工程有限公司 | A kind of beam sections free cantilever erection pier top block installation measurement method |
| CN109440648A (en) * | 2018-11-20 | 2019-03-08 | 湖南工业大学 | Double wet seam precast segment bridge assembly LFM signal devices |
| CN210420877U (en) * | 2019-06-24 | 2020-04-28 | 中交第二航务工程局有限公司 | Reference block positioning pier-side bracket structure |
| CN110820594B (en) * | 2019-12-06 | 2021-04-23 | 长沙市公路桥梁建设有限责任公司 | Symmetrical cantilever construction process suitable for expansion joint bridge pier |
| CN111411591B (en) * | 2020-04-28 | 2024-05-14 | 中铁大桥科学研究院有限公司 | Bridge pier top block installation line-shaped adjusting system and adjusting method |
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2021
- 2021-03-19 CN CN202110298365.7A patent/CN113073555B/en active Active
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