CN114960454B - Overweight upper beam construction support containing irregular decoration blocks and construction method thereof - Google Patents

Abstract

The invention discloses an overweight upper beam construction bracket with an irregular decoration block and a construction method thereof, wherein the construction bracket comprises the following steps: the brackets are arranged on the inner side walls of the two tower columns at intervals along the length direction of the bridge, and any bracket comprises two layers of brackets which are arranged at intervals along the height direction; the brackets are in one-to-one correspondence with the plurality of groups of brackets and are erected on the corresponding group of brackets; the arch truss and the column truss are respectively arranged right below the irregular decoration block and the upper beam bottom plate and are erected on the bracket through the main beam; and the plurality of bailey beams are erected at the top of the column truss, and two ends of each bailey beam are respectively supported on adjacent tower columns through temporary brackets. According to the invention, the combined bracket is adopted, and the arch truss and the column truss are respectively arranged at the decorative block and the upper beam bottom plate and are supported on the same three-dimensional bracket, so that the upper load is transmitted to the tower body through the double-layer bracket, the stress structure of the bracket is optimized, and the construction difficulty is reduced while the stability of the bracket is improved.

Description

Overweight upper beam construction support containing irregular decoration blocks and construction method thereof

Technical Field

The invention relates to the technical field of bridge superstructure construction. More particularly, the invention relates to an overweight upper beam construction bracket with an irregular decoration block and a construction method thereof.

Background

When adopting bridge tower structure in large-span bridge structure, the construction of conventional bridge tower entablature (the entablature that does not contain the decoration piece) adopts bracket type support generally, and this kind of support consumptive material is few, degree of assembly is higher and the atress is clear and definite, and solution conventional entablature support consumptive material volume that can be fine is big, dismouting difficulty, the high scheduling problem of security risk. However, when the conventional bracket type bracket is adopted for construction, the bracket type bracket is used for supporting an overweight concrete pouring system and adapting to an irregular working surface of the upper beam, and the bracket longitudinal bridge is generally provided with different supporting systems to respectively support the upper beam main body and the decoration block structure, so that the problems of overlarge bracket stress, uneven stress distribution, poor structural integrity and the like are easily caused, and the safety risk in the construction of the bracket and the bridge tower is increased.

In order to solve the problems, it is necessary to design an overweight upper beam construction support containing irregular decoration blocks and a construction method thereof, and support stability and construction safety of the support are improved.

Disclosure of Invention

The invention aims to provide an overweight upper beam construction support containing irregular decoration blocks and a construction method thereof.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an overweight upper beam construction bracket including an irregular ornamental block, comprising:

the brackets are arranged at intervals along the length direction of the bridge, each bracket comprises two layers of brackets which are arranged at intervals along the height direction of the tower columns, and each bracket comprises two special brackets which are oppositely arranged on the inner side walls of the two tower columns;

the three-dimensional brackets comprise a plurality of brackets which are arranged at intervals along the length direction of the bridge and correspond to the plurality of groups of brackets one by one, and any bracket is erected on a corresponding group of brackets;

the main cross beams are arranged at the top of the three-dimensional bracket at intervals along the width direction of the bridge, and any main cross beam is arranged along the length direction of the bridge;

the arch trusses are correspondingly arranged right below the irregular decorative blocks and erected on the main cross beams, and pouring templates of the irregular decorative blocks are paved on the arch trusses;

the column trusses are correspondingly arranged right below the bottom plate of the upper cross beam and are erected on the main cross beams;

the bridge comprises a plurality of bailey beams, wherein the bailey beams are arranged at intervals along the length direction of the bridge and are erected at the top of the column truss, any bailey beam is arranged along the width direction of the bridge, two ends of each bailey beam are respectively supported on adjacent tower columns through temporary brackets, and pouring templates of bottom plates of upper cross beams are paved at the tops of the plurality of bailey beams.

Preferably, the special bracket comprises a pre-embedded steel plate which is fixedly arranged in a corresponding tower column; the embedded steel box is of an end opening structure, the opening end of the embedded steel box is opposite to the embedded steel plate, one end of the embedded steel box is fixedly connected with the embedded steel plate and forms a closed structure, and the other end of the embedded steel box penetrates out of the inner side wall of the tower column; the embedded anchor bars penetrate through a closed structure formed by the embedded steel boxes and the embedded steel plates and are anchored in the tower column.

Preferably, the overweight upper beam construction bracket with the irregular decorative blocks comprises a transverse brace, wherein the transverse brace is arranged along the width direction of the bridge, and two ends of the transverse brace are respectively supported on two specially-made brackets positioned above the transverse brace; and the two diagonal braces are symmetrically arranged at two ends of the transverse brace and respectively supported on the two specially-made brackets positioned below, and any diagonal brace is connected with the corresponding specially-made bracket and the bottom of the transverse brace to form an A-bracket structure.

Preferably, the construction support of the overweight upper beam with the irregular decorative block, the bracket further comprises two height adjusting devices, which respectively correspond to the two diagonal braces, and any height adjusting device comprises:

the two limiting sliding plates are arranged on two sides of the special bracket connected with the corresponding diagonal brace and fixed on the tower column, and any limiting sliding plate extends upwards along the height direction of the tower column and is in fit connection with the outer side wall of the special bracket above;

the transverse sliding rail is positioned on the same side of the corresponding diagonal brace and is arranged at the bottom of the diagonal brace along the length direction;

the sliding block is arranged on the transverse sliding rail and is in sliding connection with the transverse sliding rail, and two ends of the diagonal bracing are respectively hinged with the corresponding special bracket and the sliding block;

the push rod is arranged along the length direction of the transverse sliding rail, the fixed end of the push rod is fixedly arranged at the outer end part of the transverse sliding rail, and the moving end of the push rod is fixedly connected with the sliding block.

Preferably, the overweight upper beam construction bracket with the irregular decorative blocks comprises a plurality of upright posts, and the upright posts are arranged below the bottom plate of the upper beam at intervals and fixedly supported on the main beam; the lifting jacks are in one-to-one correspondence with the upright posts, any lifting jack is vertically arranged and fixed at the top of the corresponding upright post, and the middle part of the bailey beam is supported at the top of the lifting jack; the connecting trusses are of sheet structures, and are fixedly connected with the side walls of two adjacent upright posts.

Preferably, the overweight upper beam construction support with the irregular decorative blocks further comprises a plurality of groups of unloading blocks, wherein the unloading blocks are in one-to-one correspondence with the main beams, any group of unloading blocks comprises a plurality of unloading blocks, the unloading blocks are in one-to-one correspondence with the brackets, and any unloading block is fixed between the corresponding main beam and the corresponding bracket.

Preferably, the overweight upper beam construction bracket with the irregular decorative blocks further comprises a plurality of first connecting supports which are respectively arranged among the plurality of brackets and are connected in pairs; and a plurality of second coupling struts which are respectively arranged between different arch trusses and connect the arch trusses in pairs.

Preferably, the overweight upper beam construction bracket with the irregular decorative blocks further comprises an operation platform which is arranged on the outer side of the top of the arch truss and fixedly connected with the arch truss; and the railing is fixed on the outer side of the operating platform along the circumferential direction.

The invention also provides a construction method of the overweight upper beam construction bracket with the irregular decorative blocks, which comprises the following steps:

s1, installing a plurality of groups of brackets on the steel bar structures of two tower columns and pouring concrete of the tower columns;

s2, hoisting a plurality of brackets, and respectively using a plurality of groups of brackets as supporting structures to mount the brackets;

s3, sequentially welding a plurality of groups of unloading blocks and a plurality of main beams on the plurality of brackets, then respectively welding an arch truss and a column truss on the plurality of main beams, and sequentially installing a plurality of bailey beams and a plurality of distribution beams on the column truss, wherein the arch truss is arranged at irregular decoration blocks on two sides of a bottom plate of an upper beam, the column truss is arranged in the middle position of the bottom plate of the upper beam, and adjacent brackets are connected by adopting a first connection support, and adjacent arch trusses are connected by adopting a second connection support;

s4, paving an upper beam pouring template on the basis of the three-dimensional bracket, and installing an operation platform and a railing on the outer side of the top of the arch truss to finish the installation of the overweight upper beam construction bracket with the irregular decorative blocks;

s5, performing upper beam concrete pouring construction in a layered manner;

s6, removing the construction support of the overweight upper beam with the irregular decorative block after the upper beam concrete reaches the design strength, and finishing the construction of the overweight upper beam with the irregular decorative block.

Preferably, in the construction method of the construction bracket of the overweight upper beam with the irregular decoration block, in S6, the method for removing the construction bracket of the overweight upper beam with the irregular decoration block comprises the following steps:

s61, synchronously adjusting a plurality of jacks in the column truss to separate a pouring template of the bottom plate of the upper beam from the upper beam concrete after construction;

s62, cutting off the part of the special bracket above protruding the inner side wall of the tower column from the tower column, wherein the cut-off special bracket section is clamped between the two limiting sliding plates and is in sliding connection with the limiting sliding plates;

s63, synchronously adjusting the height adjusting devices on the brackets, pushing the sliding blocks to the middle parts of the corresponding cross braces along the length direction of the transverse sliding rails through the push rods, so that the inclined braces at the two ends of the cross braces incline inwards synchronously, driving the cut special bracket sections to move downwards along the limiting sliding plates, and enabling the whole upper beam pouring template to move downwards and separate from the upper beam concrete after construction;

s64, sequentially removing the structure of the overweight upper beam construction bracket containing the irregular decorative blocks from top to bottom.

The invention at least comprises the following beneficial effects:

1. according to the invention, the combined bracket is adopted, and the double-layer brackets are arranged at the positions of the decoration block and the upper beam bottom plate at intervals for supporting the decoration block and the upper beam bottom plate on the same three-dimensional bracket, so that the upper load in construction is transferred to the tower body through the double-layer brackets, the support structure of the bracket has good integrity and more reasonable stress distribution, the construction consumable is reduced, the support stability and the safety in the upper beam construction are improved, and the construction difficulty and the construction cost are reduced;

2. according to the invention, the initial demolding of the upper beam bottom plate is realized by arranging the height-adjustable column truss, the distance between the double-layer bracket is adjusted by the triangular support structure with the angle-adjustable three-dimensional bracket, so that the integral demolding of the upper beam bottom plate and the irregular decoration block is realized, the support structure capable of adjusting the height of the pouring template step by step can ensure the support stability and construction safety of the support in the demolding process, and meanwhile, the high requirement on construction equipment when the large-scale combined support is integrally removed is reduced, and the support removing construction difficulty is reduced.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic illustration of a front elevation of an overweight upper beam construction bracket with irregular decorative blocks at the irregular decorative blocks according to an embodiment of the invention;

fig. 2 is a schematic front elevation structure of the overweight upper beam construction bracket with the irregular decoration block at the bottom plate of the upper beam in the embodiment;

FIG. 3 is a schematic A-A section of the construction bracket for the overweight upper beam with irregular decorative blocks in the embodiment;

FIG. 4 is a schematic view of a cross-sectional B-B structure of the construction bracket for an overweight upper beam with irregular decorative blocks according to the embodiment;

fig. 5 is a schematic view of the internal connection structure of the bracket according to the above embodiment.

Reference numerals illustrate:

1. specially-made bracket; 2. a bracket; 21. a cross brace; 22. diagonal bracing; 23. a limit sliding plate; 24. a transverse slide rail; 25. a slide block; 26. a push rod; 27. opposite-pulling steel bars; 3. a main beam; 4. an arch truss; 5. a column truss; 51. a column; 52. a connecting truss; 61. bailey beam; 62. a distribution beam; 63. temporary corbels; 64. a support beam; 7. an unloading block; 81. a first contact strut; 82. a second linkage support; 91. an operating platform; 92. railing; 100. a tower column; 101. irregular decorative blocks; 102. and an upper beam bottom plate.

Detailed Description

The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.

It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present invention.

As shown in fig. 1 to 5, the present invention provides an overweight upper beam construction bracket with irregular decorative blocks, comprising:

the brackets are arranged at intervals along the length direction of the bridge, any bracket comprises two layers of brackets which are arranged at intervals along the height direction of the tower column 100, and any bracket comprises two special brackets 1 which are oppositely arranged on the inner side walls of the two tower columns;

the three-dimensional bracket comprises a plurality of brackets 2 which are arranged at intervals along the length direction of the bridge and correspond to the plurality of groups of brackets one by one, and any bracket 2 is erected on a corresponding group of brackets;

the main cross beams 3 are arranged at intervals on the top of the three-dimensional bracket along the width direction of the bridge, and any main cross beam 3 is arranged along the length direction of the bridge;

the arch trusses 4 are correspondingly arranged right below the irregular decorative blocks 101 and are erected on the main cross beams 3, and pouring templates of the irregular decorative blocks 101 are paved on the arch trusses 4;

a column truss 5 provided correspondingly right under the upper beam bottom plate 102 and erected on the plurality of main beams 3;

the multiple bailey beams 61 are arranged at intervals along the length direction of the bridge and are erected at the top of the column truss 5, any bailey beam 61 is arranged along the width direction of the bridge, two ends of each bailey beam are respectively supported on adjacent tower columns 100 through temporary brackets 63, and pouring templates of the upper beam bottom plate 102 are paved at the top of the multiple bailey beams 61.

In the technical scheme, the two layers of brackets of the same group of brackets are divided into the upper layer of brackets and the lower layer of brackets, and the brackets are supported together by forming a double-layer supporting structure in the same vertical plane, so that the load generated by the bracket structure (a main beam, an arch truss, a column truss, a bailey beam and the like) on the brackets, the upper beam pouring template and the upper beam concrete is transmitted to the tower columns on two sides in a layered manner, and the problems of uneven stress, deformation, unstable support and the like caused by single-point stress on the tower columns are avoided. The invention is mainly suitable for overweight upper cross beam construction containing irregular decoration blocks, in the embodiment, the upper cross beam comprises an upper cross beam bottom plate serving as a main body structure and the irregular decoration blocks serving as additional structures, the upper cross beam bottom plate is positioned at the front side and the rear side of the upper cross beam bottom plate, corresponding column trusses are arranged under the upper cross beam bottom plate, and arch trusses are respectively arranged under the two irregular decoration blocks, namely, arch trusses are respectively arranged at the front side and the rear side of the column trusses. In order to adapt to the shape of the irregular decorative block, the top surface of the arch truss is of an arch structure, and a pouring template of the irregular decorative block is conveniently paved. The pouring templates of the bottom plates of the upper cross beams are paved on a plurality of Bailey beams, and the column trusses are used for filling the setting height difference of the pouring templates of the bottom plates of the upper cross beams and the pouring templates of the irregular decorative blocks; the upper beam pouring template is formed by the pouring template of the upper beam bottom plate and the pouring template of the irregular decoration block, the upper beam pouring template is continuously paved at the top of the construction support, and after the templates are initially installed in place, the different templates are required to be in butt joint, so that the overall upper beam pouring template is of a template structure with a closed bottom, and the subsequent concrete construction is ensured to be smoothly carried out. The temporary bracket is of a conventional bracket structure and comprises a supporting block, wherein the supporting block is arranged on the side wall of the tower column at the corresponding height and is fixedly connected with the tower column through a plurality of anchor bars, and the height of the supporting block is set according to the installation height of the Bailey beam. The multiple bailey beams 61 are further provided with multiple distribution beams 62, the distribution beams 62 are arranged between the multiple bailey beams and the pouring templates of the upper beam bottom plate at intervals along the width direction of the bridge, any distribution beam 62 is arranged along the length direction of the bridge, and the pouring templates of the upper beam bottom plate are supported on the bailey beams through the distribution beams so as to ensure uniform stress of the bailey beams. A plurality of supporting beams 64 are further arranged between the bottom of the bailey beam and the supporting structure (column truss and temporary bracket), any supporting beam 64 is arranged along the length direction of the bridge, acting force of upper load (pouring formwork and pouring concrete) of the bailey beam is evenly and stably transferred to the column truss and the tower body, and the supporting stability of the support and the tower column to the upper beam bottom plate serving as a main formwork for pouring the formwork is further guaranteed.

According to the invention, the combined bracket is adopted, and the double-layer brackets are arranged at the positions of the decoration block and the upper beam bottom plate at intervals for supporting the decoration block and the upper beam bottom plate on the same three-dimensional bracket, so that the upper load in construction is transferred to the tower body through the double-layer brackets, the support structure of the bracket has good integrity and more reasonable stress distribution, the construction consumable is reduced, the support stability and the safety in the upper beam construction are improved, and the construction difficulty and the construction cost are reduced.

In another technical scheme, the special bracket 1 comprises a pre-buried steel plate which is fixedly arranged in a corresponding tower column; the embedded steel box is of an end opening structure, the opening end of the embedded steel box is opposite to the embedded steel plate, one end of the embedded steel box is fixedly connected with the embedded steel plate and forms a closed structure, and the other end of the embedded steel box penetrates out of the inner side wall of the tower column; the embedded anchor bars penetrate through a closed structure formed by the embedded steel boxes and the embedded steel plates and are anchored in the tower column. The special bracket is arranged in the form of an embedded part so as to ensure the support stability of the special bracket to other support structures, the upper beam pouring template and the upper beam pouring concrete, and the upper load can be uniformly and stably transferred to the tower body. The integral special bracket is of a box-shaped structure, the end part of the integral special bracket, which is positioned in the tower column, can be clamped in the steel bar structure of the tower column body, and also can be bound on the steel bar structure of the tower column through a plurality of embedded anchor bars, and the embedded anchor bars penetrate out of a closed structure formed by the embedded steel box and the embedded steel plate and are anchored in the tower column. Filling holes can be formed in the middle of the embedded steel plate, when the concrete of the tower column is constructed, the concrete fills the inner space of the embedded steel box and the embedded steel plate together and forms a curing structure outside the bracket, and grouting can be performed in the closed structure before the concrete construction, so that the bracket is filled closely, and the structural strength of the special bracket is ensured. The box bracket structure increases the connection strength and the connection stability of the special bracket and the tower column body, and can be better suitable for the construction of a large upper beam structure.

In another technical scheme, the overweight upper beam construction bracket with the irregular decorative blocks comprises a transverse brace 21, wherein the transverse brace 21 is arranged along the width direction of a bridge, and two ends of the transverse brace are respectively supported on two specially-made brackets positioned above the transverse brace; and two diagonal braces 22 which are symmetrically arranged at two ends of the transverse brace 21 and respectively supported on two specially-made brackets 1 positioned below, wherein any diagonal brace 22 is connected with the corresponding specially-made bracket and the bottom of the transverse brace and forms an A-bracket structure. Specifically, both ends of the cross brace are respectively fixed at the tops of two corresponding purpose-made brackets (the tops of two upper brackets), the bottom ends of the two diagonal braces are respectively arranged at the tops of two lower brackets, and the top ends of any diagonal brace extend obliquely upwards and are supported at the bottom of the cross brace, so that a triangular support structure is formed by a single diagonal brace, the two brackets on the same side (the upper brackets and the lower brackets) and the cross brace together, the two brackets on the same side are two fulcrums, the side wall of the tower column between the two brackets serves as one side edge of the triangular support structure, and the single-point acting force of the purpose-made brackets on the tower column is converted into acting force of a bracket on a tower column section (the tower column section between the upper brackets and the lower brackets) in a certain range. In order to ensure the support stability of the cross brace to the upper structure, after the cross brace 21 is primarily fixed with the upper bracket, opposite-pull steel bars 27 are respectively arranged at two ends of the cross brace to further fixedly connect the cross brace 21 with the tower column 100, the opposite-pull steel bars 27 are finish-rolled threaded steel bars, one ends of the opposite-pull steel bars are fixed at the end parts of the cross brace 21, and the other ends of the opposite-pull steel bars outwards penetrate through the tower column 100 and are locked with the tower body through nuts. The bracket and the special bracket are used as a lower supporting structure of the integral construction bracket, so that the upper load can be effectively converted into acting force on the tower columns at two sides, the stress structure between the integral construction bracket and the tower columns is optimized, unbalanced acting force on the tower body is reduced, and the support supporting stability in the construction process is further ensured.

In another technical solution, the bracket 2 further includes two height adjusting devices, which respectively correspond to the two diagonal braces 22, and any one of the height adjusting devices includes:

two limiting sliding plates 23 which are arranged on two sides of the special bracket 1 connected with the corresponding diagonal brace 22 and are fixed on the tower column 100, wherein any limiting sliding plate 23 extends upwards along the height direction of the tower column and is in fit connection with the outer side wall of the special bracket positioned above;

the transverse sliding rail 24 is positioned on the same side of the corresponding diagonal bracing 22 and is arranged at the bottom of the diagonal bracing 21 along the length direction;

the sliding block 25 is arranged on the transverse sliding rail 24 and is in sliding connection with the transverse sliding rail, and two ends of the diagonal bracing 22 are respectively hinged with the corresponding specially-made bracket 1 and the sliding block 25;

the push rod 26 is arranged along the length direction of the transverse sliding rail 24, the fixed end of the push rod 26 is fixedly arranged at the outer end part of the transverse sliding rail, and the moving end of the push rod is fixedly connected with the sliding block.

In the above technical scheme, the whole support still needs to be dismantled after the construction of entablature concrete is accomplished, but when facing large-scale bridge tower engineering, entablature own quality, volume are great, the template of pouring it, the support of supporting all has great volume and weight, and the construction height position of entablature is higher, the tie point of sectional shelf-unit and tower post is more, the unstable, with entablature concrete structure scheduling problem of mutual interference appears easily when wholly dismantling the support, and the requirement to construction equipment (loop wheel machine or other handling equipment) is higher when demolishing, the construction degree of difficulty is high. Therefore, in the embodiment, a step-by-step dismantling method is adopted, the connection between the poured concrete and the template and the connection between the poured concrete and the bracket are required to be removed before the bracket is dismantled, and the bracket structure is dismantled in a blocking manner, so that the influence of the upper concrete structure on the bracket in the dismantling process can be avoided to a certain extent; because the construction height position of the upper beam is higher, the available construction space is limited when the bracket is dismantled, in order to further reduce the dismantling construction difficulty, a height adjusting device is further arranged at the bracket and used for adjusting the inclined angle of the inclined edge of the triangular support structure formed by the transverse support and the inclined support, so that the distance between two specially-made brackets (the upper bracket and the lower bracket) on the same side is adjusted, namely, the supporting height of the transverse support to the upper bracket structure is adjusted, the upper beam pouring template and the upper beam concrete structure are separated from each other from the inside before the bracket is dismantled, on one hand, the effective construction space is provided for the step-by-step dismantling of the bracket, on the other hand, the upper beam concrete demoulding can be realized quickly and stably, the mutual interference between the bracket and the poured concrete structure in the dismantling process is avoided, and the construction efficiency and the construction quality are influenced.

Specifically, two spacing skateboards are installed in the both sides of two purpose-made brackets and inwards compress the lateral wall of purpose-made bracket, and spacing skateboard's bottom and the lateral wall fixed connection of lower floor's bracket, and the top is connected with the lateral wall laminating of upper bracket, and spacing skateboard body laminating is fixed on the column sidewall, can further link to each other two-layer bracket and evenly transmit the upper portion load that the purpose-made bracket received to the body of the tower. Two sections of transverse sliding rails (corresponding to two height adjusting devices) are respectively arranged at the left end and the right end of the same cross brace, two special brackets at the left side correspond to the left transverse sliding rails and push rods, when the two transverse sliding rails are adjusted, the push rods at the two ends of the cross brace synchronously push corresponding sliding blocks inwards (at the middle position of the cross brace), so that the two cross braces synchronously incline inwards to rotate, and the cross brace drives an upper layer cow section (which is fixedly connected with a tower leg in a released mode) to move downwards under the action of gravity of an upper structure of the support, and stably moves along the height direction of the tower leg under the action of a limiting sliding plate. When the height adjustment is required: firstly removing temporary brackets at two ends of the bailey beam and opposite-pulling steel bars 27 at two ends of the cross brace, and removing upper brackets (sections extending out of the inner side wall of the tower column) from the tower column, wherein the limiting slide plate limits the vertical displacement of the removed special bracket section, so that the bracket section can drive the cross brace above to slide downwards along the limiting slide plate (the height direction of the tower column), but the inclined angle of the cross brace is not changed due to the action force of the push rod on the slide block, and the whole bracket is still in a stress balance and stable and motionless state; and then the sliding blocks are pushed to the middle part of the cross brace along the transverse sliding rail by using the push rods, so that the upper structure (a main beam, an arch truss, a column truss, a Bailey beam and the like) of the bracket fixedly connected with the cross brace and the pouring template of the upper beam move downwards together, the complete demoulding of the concrete structure of the upper beam is realized, and the follow-up dismantling work of the whole bracket is facilitated (the influence on the poured concrete structure and the support stability of the bracket is avoided when the dismantling is carried out). Height adjusting devices on different brackets also need to be adjusted synchronously, so that the three-dimensional bracket can move downwards integrally and stably, and the stability and safety of the integral movement of the bracket upper structure and the upper beam pouring template are ensured.

In another technical scheme, the overweight upper beam construction bracket with the irregular decorative blocks comprises a plurality of upright posts 51, and the upright posts 5 are arranged below the bottom plate of the upper beam at intervals and fixedly supported on the main beam; the lifting jacks are in one-to-one correspondence with the upright posts, any lifting jack is vertically arranged and fixed at the top of the corresponding upright post, and the middle part of the bailey beam is supported at the top of the lifting jack; the plurality of connecting trusses 52, any of which is a sheet structure, fixedly connects the side walls of two adjacent columns. Among the above-mentioned technical scheme, through setting up the high regulation of jack realization post truss at the stand top, connect the truss and be used for linking into whole with a plurality of stands, guarantee the supporting stability of post truss. When the bracket is required to be disassembled, the temporary brackets at the two ends of the bailey beam are firstly released from being connected with the tower column, then the lifting height of the jack is adjusted to enable the pouring template of the bottom plate of the upper beam to be separated from the concrete structure downwards, namely, the primary demoulding of the main structure (bottom plate part) of the upper beam is completed, the load of the poured upper beam concrete structure on the bracket below is reduced, the subsequent bracket dismantling construction is facilitated, and the system stability of the bracket during the dismantling is improved. In addition, when constructing the bridge tower entablature of different engineering, according to the installation height difference of bracket, entablature size structure difference, the installation height of the template of pouring of bailey beam, entablature bottom plate relative main beam also can change, can adjust the height of post truss through the jack, realizes the supporting height adjustment to the bailey beam, adaptation different bridge tower entablature structure construction that can be better. When the lifting height of the jack is adjusted, the jacks in the column truss are required to be synchronously adjusted so as to ensure the stability of the movement of the bailey beam, namely, the support stability of the column truss to the upper beam bottom plate pouring template is maintained.

In another technical scheme, the overweight upper beam construction support with the irregular decorative blocks further comprises a plurality of groups of unloading blocks 7, wherein the unloading blocks are in one-to-one correspondence with the main beams 3, any group of unloading blocks comprises a plurality of unloading blocks, the unloading blocks are in one-to-one correspondence with the brackets, and any unloading block 7 is fixed between the corresponding main beam 3 and the corresponding bracket 2. The unloading block can be used for adjusting the overall height of the upper structure (the main beam, the arch truss and the column truss) of the bracket, and when the bracket is required to be dismantled, the unloading block can be dismantled for the poured upper beam concrete structure.

In another technical scheme, the overweight upper beam construction bracket with the irregular decorative blocks further comprises a plurality of first connecting supports 81 which are respectively arranged among the plurality of brackets 2 and are connected in pairs; a plurality of second coupling struts 82 which are respectively provided between the different girder members 4 and connect them two by two. Among the above-mentioned technical scheme, first contact is propped and the second contact is propped and is all set up along bridge length direction, and first contact is propped including two-layer contact and is propped, and it is along the interval setting of direction of height, links into whole with a plurality of brackets, improves three-dimensional bracket's wholeness and stability. In the embodiment, the arch truss is a three-dimensional arch structure formed by combining two trusses, and the front and rear trusses are connected into a whole along the arch of the arch; meanwhile, the front side and the rear side of the bottom plate of the upper beam are respectively provided with irregular decoration blocks, the two groups of arch trusses are correspondingly arranged, and the second connecting support is also connected with the front group of arch trusses and the rear group of arch trusses, so that the integrity and the stability of the arch trusses are further ensured.

In another technical scheme, the overweight upper beam construction bracket with the irregular decorative blocks further comprises an operation platform 91 which is arranged on the outer side of the top of the arch truss 4 and fixedly connected with the arch truss; and a rail 92 fixed to the outside of the operation platform 91 in the circumferential direction. Specifically, because the position of the arch truss corresponds to the position of the irregular decoration block, the arch truss is positioned on two sides (the outer sides) of the whole upper beam, and the operation platform is arranged along the outer side of the top of the arch truss in an outward extending manner, so that a stable construction platform can be provided for the pouring construction of the upper beam, and the auxiliary operation and the placement of partial construction equipment can be conveniently carried out by constructors. The railing can protect the movement of constructors on the operation platform, and operation safety is guaranteed.

The invention also provides a construction method of the overweight upper beam construction bracket with the irregular decorative blocks, which comprises the following steps:

s1, installing a plurality of groups of brackets on the steel bar structures of two tower columns and pouring concrete of the tower columns;

specifically, firstly, manufacturing a plurality of special brackets comprising an embedded steel box, embedded anchor bars, an embedded steel plate and the like according to a construction drawing and a design requirement, wherein after the embedded steel box and the embedded steel plate are assembled in place, measures are taken to grouting gaps between the embedded steel box and the embedded steel plate, so that compactness is ensured; after the embedded steel box, the embedded steel plate and the embedded anchor bars are processed into a whole, the positions of different special brackets are accurately positioned on the tower column and are installed and fixed, then pouring of main tower concrete is carried out, and the processing and installation accuracy needs to be ensured to meet the design requirements in construction.

S2, hoisting a plurality of brackets, and respectively using a plurality of groups of brackets as supporting structures to mount the brackets; wherein, the bracket includes stull and two bracing, can also set up a plurality of stiffening girders in order to improve support strength and supporting stability between arbitrary bracing and the stull, and after the bracket is installed in place, set up respectively at the stull both ends and to drawing reinforcing bar (finish rolling screw thread reinforcing bar), with the finish rolling screw thread reinforcing bar to drawing in the column of homonymy, ensure reinforcing bar pretension.

S3, sequentially welding a plurality of groups of unloading blocks and a plurality of main beams on the plurality of brackets, then respectively welding an arch truss and a column truss on the plurality of main beams, and sequentially installing a plurality of bailey beams and a plurality of distribution beams on the column truss, wherein the arch truss is arranged at irregular decoration blocks on two sides of a bottom plate of an upper beam, the column truss is arranged in the middle position of the bottom plate of the upper beam, and adjacent brackets are connected by adopting a first connection support, and adjacent arch trusses are connected by adopting a second connection support; the arc section decoration blocks are arranged on the two sides of the upper beam, the top surface structure of the arc truss is matched with the shape of the irregular decoration blocks, and the corresponding formwork is conveniently paved on the arc truss. The unloading block is arranged on the cross brace, the main cross beam is arranged on the unloading block, the arch truss and the column truss are arranged on the main cross beam, the bailey beam is arranged on the column truss through the supporting beam, and the distribution beam is arranged on the bailey beam.

S4, paving an upper beam pouring template on the basis of the three-dimensional bracket, and installing an operation platform and a railing on the outer side of the top of the arch truss to finish the installation of the overweight upper beam construction bracket with the irregular decorative blocks;

before the template is paved, the support needs to be comprehensively checked, the support is pre-pressed, and the template, the operation platform, the railing and the like are installed after the pre-pressing. The upper beam pouring template comprises an upper beam bottom plate pouring template and irregular decoration block pouring templates on two sides, wherein the two templates are continuously paved to form an integral pouring template, the upper beam bottom plate pouring template is correspondingly arranged at the top of the Bailey beam, and the irregular decoration block pouring template is correspondingly arranged on the arch truss.

S5, performing upper beam concrete pouring construction in a layered manner; specifically, pouring upper beam concrete from bottom to top in a layered manner, tensioning part of the prestressed concrete after the first layer of concrete reaches the design strength, pouring the second layer of concrete, and tensioning the rest of the prestressed concrete after the first layer of concrete reaches the design strength;

s6, removing the construction support of the overweight upper beam with the irregular decorative block after the upper beam concrete reaches the design strength, and finishing the construction of the overweight upper beam with the irregular decorative block.

In another technical scheme, in the construction method of the construction bracket of the overweight upper beam with the irregular decoration block, in S6, the method for dismantling the construction bracket of the overweight upper beam with the irregular decoration block comprises the following steps:

s61, synchronously adjusting a plurality of jacks in the column truss to separate a pouring template of the bottom plate of the upper beam from the upper beam concrete after construction;

s62, cutting off the part of the special bracket above protruding the inner side wall of the tower column from the tower column, wherein the cut-off special bracket section is clamped between the two limiting sliding plates and is in sliding connection with the limiting sliding plates;

s63, synchronously adjusting the height adjusting devices on the brackets, pushing the sliding blocks to the middle parts of the corresponding cross braces along the length direction of the transverse sliding rails through the push rods, so that the inclined braces at the two ends of the cross braces incline inwards synchronously, driving the cut special bracket sections to move downwards along the limiting sliding plates, and enabling the whole upper beam pouring template to move downwards and separate from the upper beam concrete after construction;

s64, sequentially removing the structure of the overweight upper beam construction bracket containing the irregular decorative blocks from top to bottom.

In the technical scheme, after the layered pouring of the upper beam concrete is completed, the pouring template is required to be removed firstly, then the support structure is removed from top to bottom after the upper beam concrete reaches the design strength, but because the construction space of the upper beam-template-support is limited, the upper beam pouring template is difficult to be directly removed, and the demoulding of the concrete is required to be realized firstly through the height adjustment of the internal structure (the jack and the height adjusting device) of the support, and the template and the support structure are respectively removed. Specifically, the push rod in the height adjusting device and the jack in the column truss can be integrally controlled by the control system, the push rod can be an electric push rod, the jack can be an electric hydraulic jack, and a power supply and a hydraulic pump station for providing power for the adjusting mechanism can be arranged on the operating platform or the main beam. The control system comprises an integrated controller which is electrically connected with a plurality of push rods and a plurality of jacks; the control console is electrically connected with the integrated controller, can be arranged on the operation platform, is convenient for constructors to input control instructions through the control console, and synchronously controls the working states of the plurality of push rods or the plurality of jacks according to actual construction progress, so that the height of the column truss and the height of the integral support are adjusted. In actual construction, firstly, a jack is used for removing a die of the bottom plate part of the upper beam, so that a main die plate structure (an upper beam bottom plate pouring die plate) is separated from poured concrete firstly, and most of concrete load is removed; then the height of the upper structure of the bracket is integrally reduced by using the height adjusting device, so that the integral demoulding of the upper beam concrete structure is realized; after demoulding, enough space is reserved above the bracket (between the pouring template and the upper beam concrete), the pouring module can be quickly disassembled under the condition that the upper beam structure is not influenced, and then the bracket structure is formally disassembled step by step. The unloading blocks and the height adjusting devices can be alternatively or simultaneously installed, and the unloading blocks and the height adjusting devices have the functions of adjusting the integral height of the support structure on the transverse support, and when the unloading blocks are adopted for adjustment, a plurality of unloading blocks are preferably and synchronously removed to ensure the stability of the support in the dismantling process, so that the shaking of the upper structure of the support is avoided, the construction is complex, and the construction difficulty is high; when the height adjusting device is adopted for adjustment, the plurality of height adjusting devices can be automatically controlled by the control system to be synchronously adjusted, the height adjusting process is more controllable and stable, and the stability and the safety of support dismantling are guaranteed. When the unloading block and the height adjusting device are adopted for height adjustment, the height adjusting device can be utilized to complete integral demolding of the upper beam concrete structure, and then the unloading block is utilized to further complete separation and height reduction of the internal structure of the bracket, so that follow-up demolition construction is facilitated to be continued. In addition, after the bracket is dismantled, grouting treatment is carried out on the embedded part on the tower column and the reserved pore canal of the finish rolling deformed steel bar, so that the appearance repair of the concrete of the tower body is completed. And each structural material of the template, the embedded part and the bracket can be circulated to carry out the engineering construction of the next bridge tower.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (7)

1. An overweight entablature construction support that contains irregular decoration piece, characterized in that includes:

the brackets are arranged at intervals along the length direction of the bridge, each bracket comprises two layers of brackets which are arranged at intervals along the height direction of the tower columns, and each bracket comprises two special brackets which are oppositely arranged on the inner side walls of the two tower columns;

the three-dimensional brackets comprise a plurality of brackets which are arranged at intervals along the length direction of the bridge and correspond to the plurality of groups of brackets one by one, and any bracket is erected on a corresponding group of brackets;

the main cross beams are arranged at the top of the three-dimensional bracket at intervals along the width direction of the bridge, and any main cross beam is arranged along the length direction of the bridge;

the arch trusses are correspondingly arranged right below the irregular decorative blocks and erected on the main cross beams, and pouring templates of the irregular decorative blocks are paved on the arch trusses;

the column trusses are correspondingly arranged right below the bottom plate of the upper cross beam and are erected on the main cross beams;

the plurality of bailey beams are arranged at intervals along the length direction of the bridge and are erected at the tops of the column trusses, any bailey beam is arranged along the width direction of the bridge, two ends of each bailey beam are respectively supported on adjacent tower columns through temporary brackets, and pouring templates of the bottom plates of the upper cross beams are paved at the tops of the plurality of bailey beams;

the bracket comprises a cross brace which is arranged along the width direction of the bridge and two ends of which are respectively supported on two specially-made brackets positioned above; the two diagonal braces are symmetrically arranged at two ends of the transverse brace and respectively supported on two specially-made brackets positioned below, and any diagonal brace is connected with the corresponding specially-made bracket and the bottom of the transverse brace to form a triangular bracket structure; two height adjustment devices, it corresponds respectively with two bracing, arbitrary height adjustment device includes:

the two limiting sliding plates are arranged on two sides of the special bracket connected with the corresponding diagonal brace and fixed on the tower column, and any limiting sliding plate extends upwards along the height direction of the tower column and is in fit connection with the outer side wall of the special bracket above;

the transverse sliding rail is positioned on the same side of the corresponding diagonal brace and is arranged at the bottom of the diagonal brace along the length direction;

the sliding block is arranged on the transverse sliding rail and is in sliding connection with the transverse sliding rail, and two ends of the diagonal bracing are respectively hinged with the corresponding special bracket and the sliding block;

the push rod is arranged along the length direction of the transverse sliding rail, the fixed end of the push rod is fixedly arranged at the outer end part of the transverse sliding rail, and the moving end of the push rod is fixedly connected with the sliding block.

2. The overweight upper beam construction bracket with the irregular decorative block according to claim 1, wherein the specially-manufactured bracket comprises a pre-buried steel plate which is fixedly arranged in the corresponding tower column; the embedded steel box is of an end opening structure, the opening end of the embedded steel box is opposite to the embedded steel plate, one end of the embedded steel box is fixedly connected with the embedded steel plate and forms a closed structure, and the other end of the embedded steel box penetrates out of the inner side wall of the tower column; the embedded anchor bars penetrate through a closed structure formed by the embedded steel boxes and the embedded steel plates and are anchored in the tower column.

3. The overweight upper beam construction bracket with irregular decorative mass according to claim 1, wherein the column truss comprises a plurality of columns spaced below the upper beam floor and fixedly supported on the main beam; the lifting jacks are in one-to-one correspondence with the upright posts, any lifting jack is vertically arranged and fixed at the top of the corresponding upright post, and the middle part of the bailey beam is supported at the top of the lifting jack; the connecting trusses are of sheet structures, and are fixedly connected with the side walls of two adjacent upright posts.

4. The overweight upper beam construction bracket with irregular decorative blocks according to claim 1, further comprising a plurality of sets of unloading blocks in one-to-one correspondence with the plurality of main beams, any set of unloading blocks comprising a plurality of unloading blocks in one-to-one correspondence with the plurality of brackets, any unloading block being fixed between a corresponding main beam and a corresponding bracket.

5. The overweight upper beam construction bracket with irregular decorative mass according to claim 1, further comprising a plurality of first tie struts respectively arranged between the plurality of brackets and connecting the brackets in pairs; and a plurality of second coupling struts which are respectively arranged between different arch trusses and connect the arch trusses in pairs.

6. The overweight upper beam construction bracket with irregular decorative blocks according to claim 1, further comprising an operating platform arranged on the outer side of the top of the arch truss and fixedly connected with the arch truss; and the railing is fixed on the outer side of the operating platform along the circumferential direction.

7. The construction method of the overweight upper beam construction support with the irregular decoration blocks is characterized by comprising the following steps of:

s1, installing a plurality of groups of brackets on the steel bar structures of two tower columns and pouring concrete of the tower columns;

s2, hoisting a plurality of brackets, and respectively using a plurality of groups of brackets as supporting structures to mount the brackets;

s3, sequentially welding a plurality of groups of unloading blocks and a plurality of main beams on the plurality of brackets, then respectively welding an arch truss and a column truss on the plurality of main beams, and sequentially installing a plurality of bailey beams and a plurality of distribution beams on the column truss, wherein the arch truss is arranged at irregular decoration blocks on two sides of a bottom plate of an upper beam, the column truss is arranged in the middle position of the bottom plate of the upper beam, and adjacent brackets are connected by adopting a first connection support, and adjacent arch trusses are connected by adopting a second connection support;

s4, paving an upper beam pouring template on the basis of the three-dimensional bracket, and installing an operation platform and a railing on the outer side of the top of the arch truss to finish the installation of the overweight upper beam construction bracket with the irregular decoration blocks;

s5, performing upper beam concrete pouring construction in a layered manner;

s6, removing the overweight upper beam construction support containing the irregular decorative blocks after the upper beam concrete reaches the design strength, and finishing the overweight upper beam construction containing the irregular decorative blocks; the method for dismantling the overweight upper beam construction bracket with the irregular decorative blocks comprises the following steps:

s61, synchronously adjusting a plurality of jacks in the column truss to separate a pouring template of the bottom plate of the upper beam from the upper beam concrete after construction;

s62, cutting off the part of the special bracket above protruding the inner side wall of the tower column from the tower column, wherein the cut-off special bracket section is clamped between the two limiting sliding plates and is in sliding connection with the limiting sliding plates;

s63, synchronously adjusting the height adjusting devices on the brackets, pushing the sliding blocks to the middle parts of the corresponding cross braces along the length direction of the transverse sliding rails through the push rods, so that the inclined braces at the two ends of the cross braces incline inwards synchronously, driving the cut special bracket sections to move downwards along the limiting sliding plates, and enabling the whole upper beam pouring template to move downwards and separate from the upper beam concrete after construction;

s64, sequentially removing the structure of the overweight upper beam construction bracket containing the irregular decorative blocks from top to bottom.

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