CN212404849U - Temporary buttress anchoring system of continuous beam bridge - Google Patents
Temporary buttress anchoring system of continuous beam bridge Download PDFInfo
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- CN212404849U CN212404849U CN202020676979.5U CN202020676979U CN212404849U CN 212404849 U CN212404849 U CN 212404849U CN 202020676979 U CN202020676979 U CN 202020676979U CN 212404849 U CN212404849 U CN 212404849U
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Abstract
The application relates to a temporary buttress anchoring system of a continuous beam bridge, and relates to the field of bridge engineering construction. This interim buttress anchor system includes the stand, temporary support and prestressing tendons subassembly, the one end of stand is used for fixing on the cushion cap, temporary support all includes to down and the first interim piece and the interim piece that props up of second that set up, the one end of first interim piece is used for keeping away from the one end of cushion cap with the stand fixed, the one end that first interim piece was kept away from to the interim piece of second is used for fixed with the bottom of girder, the prestressing tendons subassembly is used for wearing to locate in the girder, and the one end of each prestressing tendons subassembly all is used for fixed with the girder, the other end all is used for keeping away from the one end of cushion cap with the stand that corresponds fixed. The application provides a temporary buttress anchor system has solved the problem that the temporary buttress anchor system atress is unclear, anchor inefficiency, application scope are narrow when the mound roof beam of continuous beam concreties temporarily among the correlation technique.
Description
Technical Field
The application relates to the field of bridge engineering construction, in particular to a temporary buttress anchoring system of a continuous beam bridge.
Background
At present, in order to solve the problem of unbalanced moment/overturning bending moment during the cantilever construction of a main beam of a continuous beam bridge, a method of arranging a temporary upright bracket beside a pier or arranging a temporary support at the top of the pier is generally adopted in engineering.
In the related art, the structural form of arranging the temporary upright post bracket beside the pier usually adopts the combination of a concrete filled steel tube upright post supported on a bearing platform and the bracket, and the bracket bears the self weight of a main beam structure and the vertical load in the construction process and transmits the self weight to the concrete filled steel tube upright post at the lower part. The pier beam consolidation temporary support is generally arranged at two sides of a support at the pier top along the bridge direction and used for resisting unbalanced moment, and the pier beam consolidation temporary support can also be divided into a one-way compression support and a two-way tension and compression support according to stress characteristics. The unidirectional compression support mainly bears vertical pressure caused by unbalanced bending moment, the restraint on the main beam is unidirectional, and the unidirectional support is matched with tension and finish rolling deformed steel bars to be used as a bidirectional tension and compression support so as to resist the downward inclination of a beam body caused by the unbalanced bending moment and restrain the upward inclination of the beam body. The overturning of the beam body is mainly caused by the difference of the actual concrete poured volume at the two ends.
However, the temporary column bracket can only be passively compressed, so that the anchoring efficiency is limited, and when the main beam structure of a construction object is large in size (the continuous beam span is large, the self weight of the beam is large due to the increase of the cross section of the beam), the diameter and the arrangement distance of the concrete-filled steel tube column must be correspondingly increased, so that the construction cost is increased; in addition, a steel support is welded between the concrete filled steel tube column and the main beam in some projects, the steel support can bear pressure and can also bear tension, but the stress of the temporary structure of the method is relatively complex, and the anchoring effect is difficult to guarantee. In addition, when the main beam overturns under the most unfavorable load working condition, one side of the one-way pressed temporary support at the two sides of the bridge pier is pressed, and the support at one side fails, so that closure and linear control of the main beam are not facilitated; the two-way tension-compression support is restricted by the structural form of the pier, the force arm of the temporary fulcrum is small, the requirements on the temporary support and the prestress tension are high, when the structural size of the main beam of a construction object is large, the anchoring capacity and the anchoring efficiency are low, meanwhile, huge vertical load is transmitted to the pier top through the support, and the risk of crushing the pier top and the beam bottom concrete is also caused.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a temporary buttress anchoring system of a continuous beam bridge, and aims to solve the problems that the stress of the temporary buttress anchoring system is unclear, the anchoring efficiency is low and the application range is narrow in the related art.
In a first aspect, there is provided a temporary pier anchoring system for a continuous beam bridge, comprising:
one end of the upright post is used for being fixed on the bearing platform;
the number of the temporary supports is matched with that of the upright columns and is arranged at one end, far away from the bearing platform, of the upright columns, each temporary support comprises a first temporary support block and a second temporary support block which are arranged from bottom to top, one end of each first temporary support block is used for being fixed with one end, far away from the bearing platform, of the upright column, and one end, far away from the first temporary support block, of each second temporary support block is used for being fixed with the bottom of a main beam;
the prestressed tendon assemblies are matched with the stand columns in number and are used for penetrating into the main beam, one end of each prestressed tendon assembly is used for being fixed with the main beam, and the other end of each prestressed tendon assembly is used for being fixed with one end, far away from the bearing platform, of the corresponding stand column.
In some embodiments, the temporary buttress anchoring system further includes a first connecting assembly, the first connecting assembly is configured to be disposed between the pillar and the pier, one end of the first connecting assembly is fixed to the pillar, and the other end of the first connecting assembly is configured to be fixed to the pier.
In some embodiments, the temporary pier anchoring system further comprises a second connecting member provided between the columns spaced apart in the width direction of the continuous bridge and connecting two adjacent columns.
In some embodiments, the temporary pier anchoring system further comprises a third connecting member, the third connecting member is used for penetrating through one end of the upright column close to the temporary support in a direction parallel to the width direction of the continuous bridge, the third connecting member is perpendicular to the upright column, and both ends of the third connecting member at least partially extend out of the upright column.
In some embodiments, the tendon assembly includes two sets of prestressed tendons, the two sets of prestressed tendons are arranged in parallel at intervals in the width direction of the continuous girder bridge, one end of each prestressed tendon is used for being fixed to the top of the main girder, the other end of each prestressed tendon is used for being fixed to a corresponding end of a third connecting member after sequentially passing through the corresponding bridge support and one end of the third connecting member extending out of the upright post, and the temporary support is located between the two sets of prestressed tendons.
In some embodiments, an anchoring system is provided at one end of the prestressed tendon, and the anchoring system includes:
the anchor backing plate is used for being embedded at one end, far away from the temporary support, of the main beam, and a through hole for the prestressed cable bundle to pass through is formed in the anchor backing plate;
the spiral rib is positioned at the bottom of the anchor backing plate and is used for being embedded in the main beam, and the spiral rib is used for sleeving and fixing the prestressed cable bundle;
and the anchor clamps are positioned at the top of the anchor backing plate and are used for fixing the prestressed cable bundles which sequentially penetrate through the spiral ribs and the through holes of the anchor backing plate.
In some embodiments, the first connection assembly comprises:
the bridge pier comprises two first connecting pieces arranged in parallel at intervals, wherein one end of each first connecting piece is fixed with the upright post, the other end of each first connecting piece is provided with a first embedded part, and the first embedded parts are used for being embedded in corresponding side walls of the bridge pier;
the reinforcing piece is obliquely arranged between the two first connecting pieces, one end of the reinforcing piece is fixed with the side wall of one of the first connecting pieces, and the other end of the reinforcing piece is fixed with the side wall of the other first connecting piece.
In some embodiments, the second connecting assembly includes at least two second connecting members parallel to each other and spaced apart from each other in a height direction of the vertical column, and the second connecting members are perpendicular to the vertical column.
In some embodiments, a second embedded part is arranged at one end of the second temporary supporting block, which is far away from the first temporary supporting block, the second embedded part is used for being embedded in the main beam, and one end of the first temporary supporting block is fixed to the upright post by welding.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a temporary buttress anchor system of continuous beam bridge, because set up the stand on the cushion cap, keep away from one of cushion cap at the stand and serve and set up temporary support, temporary support includes first temporary brace piece and the second temporary brace piece that sets up to down and on, do not have the relation of connection between first temporary brace piece and the second temporary brace piece, the one end of first temporary brace piece is fixed with the stand, the one end of the second temporary brace piece is fixed with the cushion cap, set up the prestressing tendons subassembly in the girder at last, it wears to locate in the girder and wherein one end is fixed with the top of girder, the other end is fixed with the stand end that corresponds. Therefore, each upright column, the temporary support and the prestressed tendon assembly form a complete anchor together, the periphery of the pier is provided with the complete anchor, the stress is clear, under the most unfavorable load working condition, the upright column and the temporary support on one side are pressed together, and the upright column and the prestressed tendon assembly on the other side are pulled to resist the overturning moment together; secondly, the moment of the anchoring point of the upright post is large, and the anchoring efficiency is higher and the application range is wide under the condition of the same number of temporary supports and prestressed beam assemblies; in addition, the anchorage point of the prestressed tendon assembly is far away from the bridge pier, the operation space is large, the operation space is not limited by the structural form of the bridge pier, and the damage to the main structure in the construction process can be effectively avoided. Generally, by arranging the tension-compression type support and arranging the pre-stress beam assembly in advance to apply pre-stress to the consolidation of the pier beam, the deflection of the beam end can be effectively improved when the girder body of the main beam has the tendency of overturning, and the method is favorable for the linear control and closure section construction of the cantilever construction of the continuous beam.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a temporary pier anchoring system of a continuous girder bridge provided by an embodiment of the application along the length direction of the bridge;
fig. 2 is a schematic structural diagram of a temporary pier anchoring system of a continuous beam bridge provided by the embodiment of the application along the width direction of the bridge.
In the figure: 1-upright column, 2-bearing platform, 30-prestressed cable bundle, 31-anchor backing plate, 32-spiral rib, 33-anchor clamp, 4-main beam, 5-temporary support, 51-first temporary support block, 52-second temporary support block, 6-pier, 710-first connecting piece, 711-first embedded part, 712-reinforcing piece, 72-second connecting piece, 73-third connecting piece and 8-bridge support.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a temporary buttress anchoring system of a continuous beam bridge, which can solve the problems of undefined stress, low anchoring efficiency and narrow application range of the temporary buttress anchoring system during temporary consolidation of a pier beam of a continuous beam in the related art.
Fig. 1 is a schematic structural view of a temporary buttress anchor system along the length direction of a bridge, the temporary buttress anchor system comprises a vertical column 1, a temporary support 5 and a prestressed tendon assembly, wherein, one end of the upright post 1 is used for being fixed on the bearing platform 2, the number of the temporary supports 5 is matched with that of the upright post 1 and is arranged at one end of the upright post 1 far away from the bearing platform 2, each temporary support 5 comprises a first temporary support block 51 and a second temporary support block 52 which are arranged from bottom to top, one end of the first temporary support block 51 is used for being fixed with one end of the upright post 1 far away from the bearing platform 2, one end of the second temporary support block 52 far away from the first temporary support block 51 is used for being fixed with the bottom of the main beam 4, the number of the prestressed beam assemblies is also matched with that of the upright post 1, the prestressed beam assemblies are used for being arranged in the main beam 4 in, and one end of each prestressed beam assembly is used for being fixed with the main beam 4, and the other end of each prestressed beam assembly is used for being fixed with one end, far away from the bearing platform 2, of the corresponding upright post 1.
Specifically, from structural design's angle, the quantity of stand 1, temporary support 5 and prestressing tendons subassembly is 4, along pier 6 evenly distributed all around, and stand 1 is in the same direction as bridge to axis and the bridge transverse direction of pier central line symmetry about the girder respectively, when guaranteeing that the atress is clear and definite, has also guaranteed anchor efficiency. The method comprises the following steps that an upright post embedded part is arranged at one end, close to a bearing platform 2, of an upright post 1, the upright post embedded part is embedded in the bearing platform 2, the upright post 1 is not suitable to be arranged at the edge of the bearing platform 2, the bearing platform 2 is prevented from being damaged due to the fact that the upright post embedded part is stressed too much, and a connecting limiting device is arranged between the upright post 1 and the upright post embedded part to prevent the upright post 1 from sliding on the bearing platform 2; in addition, the first temporary support block 51 and the second temporary support block 52 are not welded, that is, only pressure can be transmitted between the first temporary support block 51 and the second temporary support block 52, a second embedded part is arranged at one end of the second temporary support block 52 far away from the first temporary support block 51 and is used for being embedded in the main beam 4, and one end of the first temporary support block 51 is welded and fixed with the upright post 1; before the prestressed tendon component penetrates through the main beam 4, a prestressed duct is arranged on the main beam 4, and after the prestressed tendon component penetrates and is fixed along the prestressed duct, the prestressed duct is subjected to grouting and sealing through a grouting pipe.
Further, interim buttress anchor system still includes first connecting elements, and first connecting elements is used for locating between stand 1 and pier 6, and its one end is fixed with stand 1, and the other end is used for fixing with pier 6. Specifically, the first connecting assembly comprises two first connecting pieces 710 arranged in parallel at intervals and at least one reinforcing piece 712, wherein one end of each first connecting piece 710 is fixed to the upright 1, the other end of each first connecting piece is provided with a first embedded part 711, the first embedded parts 711 are embedded in corresponding side walls of the pier 6, the reinforcing piece 712 is obliquely arranged between the two first connecting pieces 710, one end of the reinforcing piece 712 is fixed to the side wall of one of the first connecting pieces 710, the other end of the reinforcing piece is fixed to the side wall of the other first connecting piece 710, the first connecting assembly is mainly used for fixing the upright 1 to the pier 6, and the structural stability of the upright 1 is guaranteed.
Fig. 2 is a schematic structural view of the temporary buttress anchor system along the width direction of the bridge, and further, the temporary buttress anchor system further comprises a second connecting assembly, wherein the second connecting assembly is arranged between the upright posts 1 arranged at intervals along the width direction of the continuous beam bridge and is used for connecting two adjacent upright posts 1. Specifically, the second coupling assembling includes at least two second connecting pieces 72 that are parallel and set up along the direction of height interval of stand 1, and second connecting piece 72 and stand 1 mutually perpendicular, second connecting piece 72 mainly used are connected between the stand 1, further guarantee the overall stability between the stand 1. In addition, from the viewpoint of structural design, the number of the second connection members 72 on each side is 4, which may be increased or decreased according to the actual structure.
Further, the temporary buttress anchoring system further comprises a third connecting member 73, the third connecting member 73 is used for penetrating and arranging on one end of the upright post 1 close to the temporary support 5 along a direction parallel to the width direction of the continuous bridge, the third connecting member 73 is perpendicular to the upright post 1, two ends of the third connecting member 73 at least partially extend out of the upright post 1, and the third connecting member 73 is formed by welding a rigid plate or section steel. The prestressed cable bundle assembly comprises two groups of prestressed cable bundles 30, the two groups of prestressed cable bundles 30 are arranged in parallel at intervals in the width direction of the continuous girder bridge, one end of each prestressed cable bundle 30 is used for being fixed at the top of the main girder 4, the other end of each prestressed cable bundle 30 is used for sequentially penetrating through the corresponding bridge support 8 and one end of the third connecting piece 73 extending out of the upright post 1 and then being fixed at the corresponding end of the third connecting piece 73, and the temporary support 5 is positioned between the two groups of prestressed cable bundles 30. The first connecting component should be prevented from being arranged in the same plane as the third connecting component 73, and the slenderness ratio of the first connecting component 710 and the second connecting component 72 should not be too large, so as to ensure the overall stability of the structure of the upright post 1.
Specifically, an anchoring system is arranged at one end of the prestressed cable bundle 30, and the anchoring system includes an anchor backing plate 31, a spiral rib 32 and a plurality of anchor clamps 33, wherein the anchor backing plate 31 is used for being embedded at one end of the main beam 4 far away from the temporary support 5, a through hole for the prestressed cable bundle 30 to pass through is arranged on the anchor backing plate 31, the spiral rib 32 is arranged at the bottom of the anchor backing plate 31 and is used for being embedded in the main beam 4, the spiral rib 32 is used for sleeving and fixing the prestressed cable bundle 30, and the plurality of anchor clamps 33 are arranged at the top of the anchor backing plate 31 and are used for fixing the prestressed cable bundle 30 passing through the through holes of the spiral rib 32 and the anchor backing plate 31 in.
The construction method of the temporary buttress anchoring system comprises the following steps: fix the one end of stand 1 on cushion cap 2 at first, secondly set up temporary support 5 in the stand 1 one of keeping away from cushion cap 2 one, temporary support 5 includes first interim piece 51 and the interim piece 52 that props up of second that sets up to down and last, be fixed in the stand 1 one of keeping away from cushion cap 2 with the one end of first interim piece 51, and the one end of keeping away from first interim piece 51 with the interim piece 52 of second is fixed in the bottom of girder 4, wear to locate in girder 4 with the prestressing tendons subassembly at last, and all fix with girder 4 with the one end of each prestressing tendons subassembly, the other end all is fixed with the one end that the stand 1 that corresponds was kept away from cushion cap 2.
Specifically, the method comprises seven steps, wherein the first step is that before concrete pouring of the bridge pier 6 and the bearing platform 2, the minimum embedding depth of the upright post embedded part is calculated according to the unbalanced moment (overturning moment) of the most unfavorable working condition of cantilever construction, parameters such as the specification and the number of the prestressed cable bundles 30 in the prestressed bundle assembly are determined, and then the specific arrangement position of the prestressed bundle assembly is determined according to the specification and the structural form of the main beam 4. And the second step is to bind the reinforcing steel bars of the bearing platform and pre-embed the upright post embedded parts on the bearing platform 2. And thirdly, installing the first embedded part 711, pouring concrete of the pier 6 and curing to the designed strength. And fourthly, hoisting the steel pipe for constructing the upright 1, welding the bottom of the steel pipe with the upright embedded part after accurate positioning, welding the first connecting piece 710 with the steel pipe and the first embedded part 711 together through welding, wherein a hole for the third connecting piece 73 to pass through is reserved in the bottom of the steel pipe, welding the upright 1 together through the second connecting piece 72, passing the third connecting piece 73 through the reserved hole of the steel pipe, installing in place, pouring concrete into the steel pipe to the top, vibrating, and maintaining to the designed strength to form the upright 1.
And fifthly, positioning and installing the temporary support 5, and welding the first temporary support block 51 and the end part of the upright post 1 together. And sixthly, sequentially erecting a bottom plate of the main beam 4, binding steel bars of the main beam 4, reserving a prestressed duct, installing a prestressed tendon assembly, erecting a side mold of the main beam 4, pouring concrete and maintaining to the designed strength, tensioning the prestressed tendon assembly to the designed tension, sealing an anchor at the end, grouting into the prestressed duct by a grouting pipe, and maintaining to the designed strength. And seventhly, constructing a hanging basket cantilever, closing a continuous beam, cutting the part of the prestressed beam assembly except the main beam 4, dismantling the temporary support 5, removing the anchor, dismantling the first connecting piece 710 from top to bottom, and cutting off the connection between the upright post 1 and the upright post embedded part under the cooperation of a crane to finish the whole dismantling work.
The temporary buttress anchoring system combines the upright posts 1, the temporary support 5 and the prestressed tendon assemblies, is clearly stressed, and under the condition of the worst load, the upright posts 1 and the temporary support 5 on one side are jointly pressed, and the upright posts 1 and the prestressed tendon assemblies on the other side are tensioned to jointly resist the overturning moment; the steel pipe concrete upright posts 1 are used as a part of an anchoring system, the compression performance is good, the moment of anchoring points is large, and under the condition that the number of temporary supports 5 and prestressed beam assemblies is the same, larger vertical load can be borne, the anchoring efficiency is higher, and the application range is wide; in addition, the anchorage point of the prestressed beam assembly is arranged on the third connecting piece 73, the tensioning end is arranged at the top of the main beam 4, the construction mode of the pier 6 is not limited, the operation space is large, and the damage to the main structure in the construction process can be avoided. Generally, by arranging the tension-compression type support and arranging the pre-stress beam assembly in advance to apply pre-stress to the consolidation of the pier beam, the deflection of the beam end can be effectively improved when the girder body of the main beam has the tendency of overturning, and the method is favorable for the linear control and closure section construction of the cantilever construction of the continuous beam.
In the description of the present application, 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 only for convenience in describing the present application 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 application. 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 meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, 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 above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. 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 application. Thus, the present application 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 (9)
1. A temporary buttress anchorage system for a continuous beam bridge, comprising:
one end of the upright post (1) is used for being fixed on the bearing platform (2);
the number of the temporary supports (5) is matched with that of the upright columns (1) and is arranged at one end, far away from the bearing platform (2), of the upright columns (1), each temporary support (5) comprises a first temporary support block (51) and a second temporary support block (52) which are arranged from bottom to top, one end of each first temporary support block (51) is used for being fixed with one end, far away from the bearing platform (2), of each upright column (1), and one end, far away from the first temporary support block (51), of each second temporary support block (52) is used for being fixed with the bottom of each main beam (4);
the number of the prestressed tendon assemblies is matched with that of the upright columns (1), the prestressed tendon assemblies are used for penetrating into the main beam (4), one end of each prestressed tendon assembly is used for being fixed with the main beam (4), and the other end of each prestressed tendon assembly is used for being fixed with one end, far away from the bearing platform (2), of the corresponding upright column (1).
2. A temporary pier anchoring system for a continuous girder bridge according to claim 1, wherein: the temporary buttress anchoring system further comprises a first connecting assembly, wherein the first connecting assembly is used for being arranged between the stand column (1) and the pier (6), one end of the first connecting assembly is fixed to the stand column (1), and the other end of the first connecting assembly is used for being fixed to the pier (6).
3. A temporary pier anchoring system for a continuous girder bridge according to claim 1, wherein: the temporary buttress anchoring system further comprises a second connecting assembly, wherein the second connecting assembly is arranged between the stand columns (1) at intervals in the width direction of the continuous beam bridge and is used for connecting two adjacent stand columns (1).
4. A temporary pier anchoring system for a continuous girder bridge according to claim 1, wherein: the temporary buttress anchoring system further comprises a third connecting piece (73), wherein the third connecting piece (73) is used for penetrating and arranging the column (1) close to one end of the temporary support (5) along the direction parallel to the width direction of the continuous bridge, the third connecting piece (73) is perpendicular to the column (1), and at least parts of two ends of the third connecting piece (73) extend out of the column (1).
5. A temporary pier anchoring system for a continuous girder bridge according to claim 4, wherein: the prestressed cable bundle assembly comprises two groups of prestressed cable bundles (30), the two groups of prestressed cable bundles (30) are arranged in parallel at intervals in the width direction of the continuous bridge, one end of each prestressed cable bundle (30) is used for being fixed to the top of the main beam (4), the other end of each prestressed cable bundle is used for sequentially penetrating through a corresponding bridge support (8) and one end of a third connecting piece (73) extending out of the upright post (1) and then being fixed to the corresponding end of the third connecting piece (73), and the temporary support (5) is located between the two groups of prestressed cable bundles (30).
6. A temporary pier anchoring system for a continuous girder bridge according to claim 5, wherein an anchoring system is provided at one end of the prestressed tendon (30), the anchoring system comprising:
the anchor backing plate (31) is used for being buried at one end, far away from the temporary support (5), of the main beam (4), and a through hole for the prestressed cable bundle (30) to penetrate through is formed in the anchor backing plate (31);
the spiral rib (32) is located at the bottom of the anchor backing plate (31) and used for being embedded in the main beam (4), and the spiral rib (32) is used for sleeving and fixing the prestressed cable bundle (30);
the anchor clamps (33) are positioned at the tops of the anchor backing plates (31) and are used for fixing the prestressed cable bundles (30) which sequentially penetrate through the spiral ribs (32) and the through holes of the anchor backing plates (31).
7. A temporary pier anchoring system for a continuous beam bridge according to claim 2, wherein the first connection assembly comprises:
the bridge structure comprises two first connecting pieces (710) arranged in parallel at intervals, wherein one end of each first connecting piece (710) is fixed with the upright post (1), the other end of each first connecting piece is provided with a first embedded part (711), and the first embedded parts (711) are used for being embedded in corresponding side walls of the bridge pier (6);
the reinforcing piece (712) is obliquely arranged between the two first connecting pieces (710), one end of the reinforcing piece (712) is fixed with the side wall of one first connecting piece (710), and the other end of the reinforcing piece (712) is fixed with the side wall of the other first connecting piece (710).
8. A temporary pier anchoring system for a continuous girder bridge according to claim 3, wherein: the second connecting assembly comprises at least two second connecting pieces (72) which are parallel to each other and are arranged at intervals along the height direction of the upright post (1), and the second connecting pieces (72) are perpendicular to the upright post (1).
9. A temporary pier anchoring system for a continuous girder bridge according to claim 1, wherein: one end, far away from the first temporary supporting block (51), of the second temporary supporting block (52) is provided with a second embedded part, the second embedded part is used for being embedded in the main beam (4), and one end of the first temporary supporting block (51) is fixed with the upright post (1) through welding.
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| CN202020676979.5U CN212404849U (en) | 2020-04-28 | 2020-04-28 | Temporary buttress anchoring system of continuous beam bridge |
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| CN202020676979.5U CN212404849U (en) | 2020-04-28 | 2020-04-28 | Temporary buttress anchoring system of continuous beam bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235459A (en) * | 2021-06-17 | 2021-08-10 | 安徽省路港工程有限责任公司 | Assembled main bridge pier roof beam concreties device temporarily |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235459A (en) * | 2021-06-17 | 2021-08-10 | 安徽省路港工程有限责任公司 | Assembled main bridge pier roof beam concreties device temporarily |
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