CN218405092U - A cast-in-place roof beam side span construction bracket and pre-compaction device for bridge construction - Google Patents

A cast-in-place roof beam side span construction bracket and pre-compaction device for bridge construction Download PDF

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Publication number
CN218405092U
CN218405092U CN202222791801.7U CN202222791801U CN218405092U CN 218405092 U CN218405092 U CN 218405092U CN 202222791801 U CN202222791801 U CN 202222791801U CN 218405092 U CN218405092 U CN 218405092U
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bearing
bent cap
cast
bracket
construction
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柴泽民
王凯
刘玉兴
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Second Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Yalong River Hydropower Development Co Ltd
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Second Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
Yalong River Hydropower Development Co Ltd
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Abstract

The utility model discloses a cast-in-place beam side span construction bracket and a prepressing device for bridge construction, which comprises a horizontal embedded part, a vertical embedded part, a triangular oblique beam, a distribution beam, a bearing beam and a preloading block; one end of the triangular oblique beam is connected with the vertical embedded part, and the other end of the triangular oblique beam is fixedly fixed at the bottom of the bearing beam. One side of the bent cap is a lifting bearing structure of the side span to be poured, and the other side of the bent cap is a prepressing structure; the lifting bearing structure and the pre-pressing structure are symmetrically arranged. The utility model discloses the bracket is pour the cast-in-place section of bridge side span, and construction convenience is rapid, and each component of bracket installation is convenient with the dismantlement, and construction speed has effectively improved with efficiency, the engineering time and the construction cost that have significantly reduced. Can carry out effective inspection adaptation to the holistic installation error of this bracket through pre-compaction structure, promote the robustness simultaneously, also further overcome and wait to water the founding mould error of building the limit span, increase whole construction quality.

Description

A cast-in-place roof beam side span construction bracket and pre-compaction device for bridge construction
Technical Field
The utility model belongs to the technical field of the bridge construction, especially, relate to a bracket structure and pre-compaction structure of cast-in-place roof beam sidespan construction, especially, relate to a cast-in-place roof beam sidespan construction bracket and pre-compaction device for bridge construction.
Background
The existing method that the floor stand is adopted for the side span cast-in-place section support is limited by a construction site or a pier stud is high, the implementation of the floor stand is not economical or has no floor stand implementation conditions, and the floor stand has some defects, mainly manifested in that the consumption of materials is large, the construction progress is slow, and particularly, the method for erecting the support by using a straight steel pipe needs to treat a foundation, the process is complex, and the cost is high.
Chinese patent 201920675490.3 discloses a cast-in-place beam side span construction bracket, wherein a plurality of triangular supports are respectively arranged in parallel on two opposite sides of a side span pier along the bridge direction, each triangular support comprises a bearing beam, one end of the bearing beam is welded with the upper end of an inclined strut, and the other end of the bearing beam and the lower end of the inclined strut are respectively connected with a pin joint plate which is fixed on a pier body in advance through pin shafts; erecting a distribution beam on the top of a bearing beam on one side of a pier cast-in-place beam in the transverse direction of a bridge, and erecting a cast-in-place beam template on the distribution beam; each bearing beam on the other side of the pier is provided with a through jack, the top of the jack is provided with a shoulder pole beam, an anchor rod is arranged corresponding to each bearing beam, the lower end of each anchor rod is anchored with the pier bearing platform, and the upper end of each anchor rod sequentially penetrates through the bearing beams, the jacks and the shoulder pole beams from bottom to top and then is fixed by nuts. The technical scheme is suitable for support protection construction based on piers, but for the actual site, in order to ensure the installation precision of a forming die, a pre-installed supporting structure needs to be pre-pressed so as to eliminate the inelastic deformation and the measured elastic deformation of an installation device; obviously, the device structure disclosed in the chinese patent 201920675490.3 implements an edge-span construction bracket device, and cannot effectively solve the robustness and reliability of the installation mold.
In view of the above, a more economical and reasonable support structure with pre-pressing function is needed to replace the existing floor stand.
Disclosure of Invention
The utility model aims at the complicated, with high costs problem of process that the support exists that falls to the construction of sidespan section to and the poor problem of assembly error, the robust performance that current shaping bracket supporting construction exists, provide a simple structure, set up convenient cast-in-place roof beam sidespan bracket pre-compaction device.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
a cast-in-place beam side span construction bracket and a prepressing device for bridge construction comprise a horizontal embedded part, a vertical embedded part, a triangular oblique beam, a distribution beam, a bearing beam and a pile-loading prepressing block; the horizontal embedded parts are arranged at intervals along the top of the bent cap in rows, and the vertical embedded parts are arranged along the side part of the bent cap; the bearing beams are symmetrically arranged along the bent cap left and right; a plurality of distribution beams are arranged and fixedly connected above the bearing beam; the bearing beam is fixedly connected with a horizontal embedded part at the top of the bent cap; one end of the triangular oblique beam is connected with the vertical embedded part, and the other end of the triangular oblique beam is fixedly fixed at the bottom of the bearing beam.
One side of the bent cap is a lifting bearing structure of the side span to be cast, and the other side of the bent cap is a prepressing structure; the lifting bearing structure and the pre-pressing structure are symmetrically arranged.
The bearing beam is horizontally arranged along the top of the cover beam in an extending manner to form a cantilever structure; and a cantilever structure of the bearing beam on one side of the bent cap is provided with a supporting structure of the cantilever structure of the bearing beam on one side of the bent cap.
The preloading block is arranged on a cantilever structure of the bearing beam at the other side of the bent cap symmetrical to the lifting bearing structure, and the preloading block is of a preloading structure.
Furthermore, bamboo plywood is laid on the distribution beam of the lifting bearing structure, and the bamboo plywood and the top surface of the cover beam are located at the same elevation; the bamboo plywood is a bottom die structure of a side span to be poured.
Furthermore, protective railings are welded on the edges of the distribution beam and the bearing beam.
Further, the preloading blocks are composed of sand bags.
Furthermore, the triangular oblique beam, the distribution beam and the bearing beam are channel steel or I-steel; the horizontal embedded parts and the vertical embedded parts are steel plates.
As the scheme is further optimized, before the bracket is used, a pre-pressing system is used for carrying out a load loading test on the bracket, the pre-pressing system is arranged on the upper portion of the bracket, and a sandbag piling mode is adopted for pre-pressing. The purpose of bracket pre-pressing is to eliminate inelastic deformation and measure elastic deformation, provide parameters for determining elevation of a vertical mold and carry out load loading on the bracket under a completely simulated construction state.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the bracket is poured to the cast-in-place section of bridge side span, and construction convenience is rapid, and each component of bracket installation and dismantlement are convenient, and construction speed and efficiency have obtained effective improvement, have significantly reduced engineering time and construction cost. Can carry out effective inspection adaptation to the holistic installation error of this bracket through pre-compaction structure, promote the robustness simultaneously, also further overcome the upright mould error of waiting to water the limit span, increased whole construction quality.
Drawings
Fig. 1 is the utility model provides a pair of vertical plane structure sketch map of cast-in-place roof beam side span construction bracket.
Fig. 2 is the utility model provides a pair of cast-in-place roof beam side span construction bracket's side structure schematic diagram.
In the figure: 11. the method comprises the following steps of horizontal embedded parts, 12 vertical embedded parts, 13 triangular oblique beams, 14 distributing beams, 15 bearing beams, 2 cover beams, 3 stacking and pre-pressing blocks, and 4 side spans to be poured.
Detailed Description
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 only some embodiments of the present application, and 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.
In the description of the present embodiment, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the invention, "a plurality" means two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Referring to fig. 1 and 2, the embodiment is a cast-in-place beam side span construction bracket and a pre-pressing device for bridge construction, and the cast-in-place beam side span construction bracket and the pre-pressing device comprise a horizontal embedded part 11, a vertical embedded part 12, a triangular oblique beam 13, a distribution beam 14, a bearing beam 15 and a preloading block 3; the horizontal embedded parts 11 are arranged at intervals along the top of the bent cap 2 in rows, and the vertical embedded parts 12 are arranged along the side part of the bent cap 2; the bearing beams 15 are symmetrically arranged along the bent cap 2; a plurality of distribution beams 14 are arranged and fixedly connected above the bearing beam 15; the bearing beam 15 is fixedly connected with the horizontal embedded part 11 at the top of the bent cap 2; one end of the triangular oblique beam 13 is connected with the vertical embedded part 12, and the other end of the triangular oblique beam 13 is fixedly fixed at the bottom of the bearing beam 15.
One side of the bent cap 2 is a lifting bearing structure of the side span section 4 to be poured, and the other side of the bent cap is a prepressing structure; the lifting bearing structure and the pre-pressing structure are symmetrically arranged.
The bearing beam 15 extends horizontally along the top of the bent cap 2 to form a cantilever structure; and a cantilever structure of the bearing beam 15 on one side of the bent cap 2 is provided with a span section 4 to be cast and a lifting bearing structure of the cantilever structure of the bearing beam 15 on one side of the bent cap 2.
The preloading prepressing block 3 is arranged on a cantilever structure of a bearing beam 15 at the other side of the bent cap beam 2 symmetrical to the lifting bearing structure, and the preloading prepressing block 3 is of a prepressing structure.
The distribution beam 14 is a gravity dispersion beam for lifting the load-bearing structure and the pre-pressing structure, and the support force and the pre-pressing force are dispersed through the distribution beam 14.
Bamboo plywood is laid on the distribution beam 14 of the lifting bearing structure, and the bamboo plywood and the top surface of the cover beam 2 are located at the same elevation; the bamboo plywood is a bottom die structure of the side span section 4 to be poured.
Guard rails 16 are welded at the edges of the distribution beam 14 and the bearing beam 15 to form a safety protection operation platform.
The preloading briquetting 3 is composed of sand bags, the weight of the preloading briquetting 3 is controlled through the sand bags, so that the preloading of a cast-in-place beam side span construction bracket in bridge construction is realized, and the influence of stress strain and bottom die deformation caused by assembly errors is reduced.
As the scheme is further optimized, the components are preferably welded, connected and fixed; the triangular oblique beam 13, the distribution beam 14 and the bearing beam 15 are channel steel or I-steel; the horizontal embedded parts 11 and the vertical embedded parts 12 are steel plates.
Examples
The bearing beam 15 is selected from 32 beams with 5 pieces and 9m length # The I-beams are placed on the top of the bent cap 2 one by one and correspond to the horizontal embedded parts 11 one by one, all contact surfaces and connection points are welded, a cable crane is adopted to be matched to weld the 32# I-beam inclined struts below the I-beams in place, 5 [12 channel steel is arranged above the I-beams to serve as distribution beams 14, the distance is 30cm, and the I-beams are located at the same elevation.
Bamboo plywood is laid on the distribution beam 14. And (3) before laying, properly adjusting according to the designed elevation of the bottom die, and then fixing the periphery of the bamboo plywood to prevent deviation.
Bricks are built around the projection position of the pier top bottom plate at the lower part of the bent cap 2, medium and coarse sand is filled in the bricks, and a layer of bamboo plywood is laid on the top surface of the sand after tamping to serve as a bottom die of the pier top part.
Arranging a safe operation platform: the width of the protection platform is equal to 0.8m, and a steel pipe protection fence with the height of 1.5m is arranged on the outer side of a bracket consisting of a triangular oblique beam 13, a distribution beam 14 and a bearing beam 15.
The purpose of support pre-pressing is to eliminate inelastic deformation and measure elastic deformation amount, and parameters are provided for determining elevation of the vertical mold. The loading weight of the pile-loading pre-pressing block 3 is adjusted by adjusting the number of the sand bags, and load loading is carried out in a construction state before the templates of the bearing structure and the side span 4 to be cast are lifted and assembled in place.
(1) Weight of the pile load: and determining the surcharge weight of the surcharge prepressing block 3 according to the structural size of the cast-in-place section, and surcharge prepressing in a ton bag sand mode according to the actual situation on site.
(2) Checking before loading: and (5) checking whether each component is deformed or not, and detecting each welding line to meet the requirement of design specifications. And checking whether the connection between the components of the bracket is firm or not. And the pouring state is completely simulated for complete inspection, and loading work can be carried out after the pouring state is completely inspected to be qualified.
(3) Loading: and (3) loading step by step in the range of the beam end according to 50% -100% -110% of the load, measuring and recording after each step of loading is finished, and observing the stress condition of the bracket. And when the sand bag is loaded to the designed load and placed for 24 hours, the sand bag is measured and the result is recorded, and the sand bag can be withdrawn after the measurement is finished.
The individual weight loads must be carefully calculated and recorded, and the person skilled in the art is responsible for them. In the loading process, the loading time, tonnage and position are required to be recorded in detail, and a measurement group is required to be informed to track and observe on site in time. The next stage of loading cannot be performed without observation. And when the first-stage loading is finished, the first-stage loading is suspended for a period of time, observation is carried out, the bracket component is checked, the loading is stopped in time when abnormal conditions are found, the loading is analyzed in time, and corresponding measures are taken. If the difference between the measured value and the theoretical value is too large, the reason for analyzing is analyzed, and then the next scheme is determined.
In the whole loading process, the unified organization and the unified command are required, and professional technicians and responsible persons are required to coordinate on site. The data of all the marked points are tested at each loading stage. If the local deformation is too large, the loading is stopped, and the system can be continuously loaded after being reinforced. And during unloading, after each stage of unloading is observed and finished, recording, unloading to the next stage of load, and measuring and recording the elastic recovery condition of the bracket component. And abnormal problems found on site need to be reported in time.
Compared with the prior art, the utility model discloses adopt the bracket to cast-in-place section cantilever part and bear whole loads, before the bracket uses, carry out load loading test to the bracket through the pre-compaction structure, pre-compaction structural arrangement adopts sand bag surcharge mode pre-compaction on bracket upper portion. The purpose of pre-pressing is to eliminate the inelastic deformation of the bracket and measure the elastic deformation, provide parameters for determining the elevation of the vertical mold of the span section 4 of the side to be poured and carry out a load loading test on the bracket under the completely simulated construction state.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be considered by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims (5)

1. The utility model provides a cast-in-place roof beam side span construction bracket and pre-compaction device for bridge construction which characterized in that: the device comprises a horizontal embedded part, a vertical embedded part, a triangular oblique beam, a distribution beam, a bearing beam and a pile-loading pre-pressing block; the horizontal embedded parts are arranged at intervals along the top of the bent cap in rows, and the vertical embedded parts are arranged along the side part of the bent cap; the bearing beams are symmetrically arranged along the bent cap left and right; a plurality of distribution beams are arranged and fixedly connected above the bearing beam; the bearing beam is fixedly connected with a horizontal embedded part at the top of the bent cap; one end of the triangular oblique beam is connected with the vertical embedded part, and the other end of the triangular oblique beam is fixed at the bottom of the bearing beam;
one side of the bent cap is a lifting bearing structure of the side span to be cast, and the other side of the bent cap is a prepressing structure; the lifting bearing structure and the prepressing structure are symmetrically arranged;
the bearing beam extends horizontally along the top of the bent cap to form a cantilever structure; a to-be-cast side span is arranged on the cantilever structure of the bearing beam on one side of the bent cap, and a lifting bearing structure of the cantilever structure of the bearing beam on one side of the bent cap is arranged on the cantilever structure of the bearing beam on one side of the bent cap;
the preloading block is arranged on a cantilever structure of the bearing beam at the other side of the bent cap symmetrical to the lifting bearing structure, and the preloading block is of a preloading structure.
2. The cast-in-place beam side span construction bracket and pre-pressing device for bridge construction according to claim 1, characterized in that: bamboo plywood is laid on the distribution beam of the lifting bearing structure, and the bamboo plywood and the top surface of the cover beam are located at the same elevation; the bamboo plywood is a bottom die structure of the side span to be poured.
3. The cast-in-place beam side span construction bracket and pre-pressing device for bridge construction according to claim 1, characterized in that: and protective railings are welded at the edges of the distribution beam and the bearing beam.
4. The cast-in-place beam side span construction bracket and pre-pressing device for bridge construction according to claim 1, characterized in that: the pile-loading pre-pressing block consists of a sand bag.
5. The cast-in-place beam side span construction bracket and pre-pressing device for bridge construction according to claim 1, characterized in that: the triangular oblique beam, the distribution beam and the bearing beam are channel steel or I-steel; the horizontal embedded parts and the vertical embedded parts are steel plates.
CN202222791801.7U 2022-10-23 2022-10-23 A cast-in-place roof beam side span construction bracket and pre-compaction device for bridge construction Active CN218405092U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222791801.7U CN218405092U (en) 2022-10-23 2022-10-23 A cast-in-place roof beam side span construction bracket and pre-compaction device for bridge construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222791801.7U CN218405092U (en) 2022-10-23 2022-10-23 A cast-in-place roof beam side span construction bracket and pre-compaction device for bridge construction

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Publication Number Publication Date
CN218405092U true CN218405092U (en) 2023-01-31

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