CN211596419U - Integral closure device of rigid frame bridge side span - Google Patents
Integral closure device of rigid frame bridge side span Download PDFInfo
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- CN211596419U CN211596419U CN201922070476.3U CN201922070476U CN211596419U CN 211596419 U CN211596419 U CN 211596419U CN 201922070476 U CN201922070476 U CN 201922070476U CN 211596419 U CN211596419 U CN 211596419U
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Abstract
The utility model discloses a rigid frame bridge side span integral closure device, relating to the technical field of bridge construction; the device comprises a hanging basket, fixed side piers, a bracket and a bottom plate longitudinal beam, wherein the hanging basket and the bottom plate longitudinal beam are respectively detachably connected with the constructed bridge section part, and the bracket is installed between the bottom plate longitudinal beam and the side piers. Utilize side mound, bracket and cantilever hanging basket overlap joint, construct stable rigidity work platform, will close the whole formwork erection of long section and side mound cast-in-place section on this work platform and cast in situ, saved the process that the support was set up, was pour in batches, be favorable to reducing the side span and close a long construction period, simplify and close the long process to continuous rigid frame bridge side span construction has apparent process reduction, time saving, economic saving effect.
Description
Technical Field
The utility model relates to a bridge construction technical field especially relates to an integral closure device of rigid frame bridge side span.
Background
At present, when a high-pier rigid frame bridge is closed in a side span mode, a support is often erected at a cast-in-place section for cast-in-place, the support erection construction wastes time and labor, the construction of a bridge with a higher pier body is difficult, and the bridge can be put into use only by performing support pre-pressing. After the cast-in-place section is maintained and molded, the closure cantilever section needs to be pressed downwards by a balance weight, then a rigid framework is welded between the closure cantilever section and the closure cantilever section for connection and fixation, and a hanging basket is erected for erecting and pouring the closure section. The existing steel frame bridge side span cast-in-place closure has the disadvantages of complex process, more working conditions, longer construction period, more manpower and equipment required to be input, and is not beneficial to light and rapid construction. Therefore, a device capable of quickly realizing the integral closure of the rigid frame bridge is urgently needed to be found.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an integral closure device of rigid frame bridge side span to solve the aforementioned problem that exists among the prior art.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
the integrated closure device for the side span of the rigid frame bridge is detachably connected with a constructed bridge section part and comprises a hanging basket, fixed side piers, a bracket and a bottom plate longitudinal beam, wherein the hanging basket and the bottom plate longitudinal beam are respectively detachably connected with the constructed bridge section part, and the bracket is installed between the bottom plate longitudinal beam and the side piers.
Preferably, the floor longitudinal beam is connected below the constructed bridge section, and the length of the floor longitudinal beam extends out of the constructed bridge section; the hanging basket is connected above the constructed bridge section, and the hanging basket can extend out of the constructed bridge section.
Preferably, the bracket is a plurality of brackets arranged in parallel, and each bracket is connected with the side pier and the bottom plate longitudinal beam.
Preferably, the bracket is a right triangle and comprises a first right-angle side, a second right-angle side and a hypotenuse, wherein the first right-angle side is fixed on the side pier; and the second right-angle side is horizontally laid between the bottom plate longitudinal beam and the side pier.
Preferably, the first right-angle side of the bracket and the side pier are fixed in a welding mode, the welding can be only partial welding, the whole length of the first right-angle side can be welded on the side pier, and the bracket and the side pier are guaranteed to be stable enough.
Preferably, in order to further stabilize the supporting force and stability of the bracket, a supporting beam is further arranged on the bracket, one end of the supporting beam is connected to the middle of the hypotenuse of the right triangle, and the other end of the supporting beam is connected to the second right-angled side.
More preferably, the number of the support beams is 1-3.
Preferably, the closure device further comprises a bracket cushion block and a pouring bottom die, and the bracket cushion block is arranged between the pouring bottom die and the second right-angle edge.
More preferably, the plurality of bracket cushion blocks are uniformly distributed between the pouring bottom die and the second right-angle side.
More preferably, the closure device further comprises welding section steel, and the welding section steel is installed between the bottom plate longitudinal plate and the support through the hanging basket.
The utility model has the advantages that:
the utility model discloses an integral device that closes in rigid frame bridge side span, the device utilize side mound bracket and cantilever to hang the basket overlap joint, found stable rigidity work platform, will close the section and cast-in-place the whole formwork erection of the cast-in-place section of side mound on this work platform, saved the process that the support was set up, pour in batches, be favorable to reducing the side span and close construction period, simplify and close the dragon process, thereby have apparent process reduction, time is saved, economic saving effect to the construction of continuous rigid frame bridge side span.
Drawings
Fig. 1 is an installation structure diagram of a rigid frame bridge side span integrated closure device in embodiment 1;
1-hanging basket, 2-integral beam section to be constructed, 3-constructed beam section, 4-bottom plate longitudinal beam, 5-welding section steel, 6-pouring bottom die, 7-bracket cushion block, 8-bracket and 9-side pier.
FIG. 2 is a schematic flow chart of construction using the apparatus of example 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
Example 1
The embodiment provides an integral closure device for a side span of a rigid frame bridge, and as shown in fig. 1, the closure device disclosed in the embodiment is detachably connected with a constructed bridge section part, the closure device comprises a hanging basket, a fixed side pier, a bracket and a bottom plate longitudinal beam, the hanging basket and the bottom plate longitudinal beam are respectively detachably connected with the constructed bridge section part, the floor longitudinal beam is connected below the constructed bridge section, and the length of the floor longitudinal beam extends out of the constructed bridge section; the hanging basket is connected above the constructed bridge section, and can extend out of the constructed bridge section; the bracket is mounted between the floor stringer and the side pier.
The bracket is a plurality of parallel arrangement's bracket, and every the bracket all is connected with side pier and bottom plate longeron.
The bracket in the embodiment is a right-angled triangle and comprises a first right-angled side, a second right-angled side and a hypotenuse, wherein the first right-angled side is fixed on the side pier; the second right-angle side is horizontally laid between the bottom plate longitudinal beam and the side piers and is fixed on the side piers. The first right-angle side of the bracket and the side pier are fixed in a welding mode, the welding can be only partial welding, the whole length of the first right-angle side can be welded on the side pier, and the bracket and the side pier can be ensured to be stable enough.
In order to further stabilize the supporting force and stability of the bracket, a supporting beam is further arranged on the bracket, one end of the supporting beam is connected to the middle of the hypotenuse of the right triangle, and the other end of the supporting beam is connected to the second right-angle side. The number of the support beams is usually 1-3, and the number of the support beams in the embodiment is 2.
The closure device in the embodiment further comprises a bracket cushion block and a pouring bottom die, wherein the bracket cushion block is arranged between the pouring bottom die and the second right-angle side; the bracket cushion blocks are uniformly distributed between the pouring bottom die and the second right-angle side.
The closure device further comprises welding section steel, the welding section steel is installed between the bottom plate longitudinal plate and the support through the hanging basket, and the front end of the hanging basket is also fixed to the welding section steel.
Example 2
The embodiment provides a process for performing construction by using the closure device in embodiment 1 as a working platform, and a schematic flow diagram of the process is shown in fig. 2, and the process includes the following steps:
(1) and (3) carrying out a scheme conference: before the maximum cantilever section of the side span closure is not constructed, project groups need to discuss a closure scheme according to the closure construction process, and formulate a preliminary technical scheme and a closure procedure. After meeting discussion, special calculation, design and other unit approval, relevant examination and approval documents are obtained, and then technical background is developed to prepare construction.
(2) Linear monitoring: monitoring the structural displacement and stress change caused by the structural temperature change for 24 hours, carrying out modeling calculation according to the closure technical file, and analyzing the linear influence of the new process on the structure. And (3) precisely erecting the mode of the maximum-span cantilever section under the condition of considering the temperature influence by taking the structural linearity and safety as the criteria. Meanwhile, as the cast-in-place section and the closure section are integrally cast on the built working platform, the pre-pressing load applied to the maximum cantilever section is suitable for considering the total weight of the cast-in-place section and the closure section of 1/2; and considering the unbalance of the structure unbalance load, the mid-span cantilever section should be reasonably weighted by calculation to ensure the structure safety. The specific standard of the closure counterweight is to calculate and select a proper counterweight by monitoring according to the actual condition of the structure.
(3) Constructing a maximum cantilever section: after the side span maximum cantilever beam section is erected, pouring is carried out at a stable and low temperature period according to design and monitoring requirements, the hanging basket is pushed forwards after the cantilever beam section is integrally formed and tensioned, and the length of the lap joint of the total length of the side span cast-in-place section and the closure section is extended out by about 1/5.
(4) Constructing a working platform of the closure device: when the working platform is constructed, project groups can build a plurality of parallel brackets on the side pier for fixing after the construction of the maximum cantilever section of the side span according to the field condition. The bracket is generally in a right-angled triangle shape and is welded and built by adopting section steel, and one right-angled side of the bracket is welded at the side pier and has enough welding length; the length of the other right-angle side is about 4/5 total lengths of the side span cast-in-place section and the closure section, the side span cast-in-place section and the closure section are horizontally arranged and used for building a working platform, the elevation of the working platform is slightly lower than the elevation of the bottom of the closure section beam at the position corresponding to the mileage by 1-2cm, and a padding space required by linear control is reserved. The temporary working platform is constructed by the bracket and the hanging basket together, the distance between the bracket and the hanging basket is less than 0.2m, and the bracket and the hanging basket are not connected yet. After the temporary working platform is built, the temporary working platform is subjected to a pre-pressing test, a transverse base plate is laid on the bracket and the hanging basket, and the distance between the bracket and the hanging basket is also built and laid by the base plate. And then, carrying out a pre-pressing test for steps according to 20% of the total weight of the side span cast-in-place section and the closure section until the weight of the side span cast-in-place section and the closure section reaches 120% of the total weight, wherein the corresponding mid-span counterweight is configured according to monitoring calculation in the pre-pressing process. And after the pre-pressing test, adjusting the height of the cradle according to the pre-pressing test and the monitoring calculation, and determining the height of the cushion block of the bracket. And then, the hanging basket and the bracket are connected by welding profile steel along the longitudinal bridge direction to complete closure and locking, so that a formal working platform is formed. In order to ensure the safety and stability of the joint, the steel section, the hanging basket and the bracket have enough welding length, and the welding length of each side is not less than 0.2 m.
(5) Preparation of cast-in-place construction: after the working platform is constructed, a series of preparation works before pouring, such as template laying, reinforcement binding, prestressed pipeline installation and the like, are carried out.
(6) And (3) pressurizing the beam end: and after the preparation of the side span integral cast-in-place construction is finished, beam end pressurization is carried out. The boost weight should be the maximum weight standard to monitor the weight provided after calculation. In the actual loading process, the midspan and the side span are carried out simultaneously, but certain errors may exist between monitoring calculation and the actual condition of the structure, so that a certain risk may exist when the monitoring numerical value is used for carrying out counterweight, the counterweight is loaded by 20% gradient, the beam section linear shape is observed after the structure is stabilized after the counterweight is loaded by 20% of gradient weight, the loading is carried out by taking the reasonable linear control as a criterion, and the loading weight cannot exceed the counterweight standard provided by monitoring.
(7) Side span integral cast-in-place construction: according to design and monitoring requirements, the side span cast-in-place section and the closure section are poured in a stable and low temperature period, the side span beam section counter weight is released in a moderate proportion in the pouring process, pouring and releasing are guaranteed to be stably and synchronously carried out, and the mid-span counter weight is kept unchanged. And stretching the prestress after the whole maintenance and molding of the poured beam section.
(8) Dismantling a working platform: after the side span closure pouring, the middle span closure pouring is immediately carried out; and after the full bridge is closed and the prestressed grouting reaches the design requirement, removing the connection between the cradle and the bracket, then descending the side-striding cradle, removing the bracket cushion block, dropping the bottom die, removing the working platform template, removing the cradle and removing the bracket. And the template, the hanging basket and the bracket are detached by a crane and a winch and then are gradually put down to the ground.
Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:
the utility model discloses an integral device that closes in rigid frame bridge side span, the device utilize side mound bracket and cantilever to hang the basket overlap joint, found stable rigidity work platform, will close the section and cast-in-place the whole formwork erection of the cast-in-place section of side mound on this work platform, saved the process that the support was set up, pour in batches, be favorable to reducing the side span and close construction period, simplify and close the dragon process, thereby have apparent process reduction, time is saved, economic saving effect to the construction of continuous rigid frame bridge side span.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (7)
1. The integrated closure device for the side span of the rigid frame bridge is detachably connected with a constructed bridge section part and is characterized by comprising a hanging basket, fixed side piers, a bracket and a bottom plate longitudinal beam, wherein the hanging basket and the bottom plate longitudinal beam are respectively detachably connected with the constructed bridge section part, and the bracket is installed between the bottom plate longitudinal beam and the side piers.
2. The integral closure device of rigid frame bridge side span of claim 1, wherein the bracket is a plurality of brackets arranged in parallel, and each bracket is connected with the side pier and the bottom plate longitudinal beam.
3. The integral closure device of claim 1, wherein the bracket is a right triangle, wherein the first right side is fixed on the side pier; and the second right-angle side is horizontally laid between the bottom plate longitudinal beam and the side pier.
4. The integral closure device of rigid frame bridge side span of claim 3, wherein the first right-angle side of the bracket and the side pier are fixed by welding.
5. The integral closure device of claim 3, wherein a support beam is further arranged on the bracket, one end of the support beam is connected to the middle of the hypotenuse of the right triangle, and the other end of the support beam is connected to the second right-angle side.
6. The integral closure device of rigid frame bridge side span of claim 3, further comprising a bracket cushion block and a pouring bottom mold, wherein the bracket cushion block is arranged between the pouring bottom mold and the second right-angle side.
7. The integral closure device of rigid frame bridge side span of claim 1, further comprising a welding section steel, wherein the welding section steel is installed between the bottom plate longitudinal beam and the bracket through the hanging basket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922070476.3U CN211596419U (en) | 2019-11-26 | 2019-11-26 | Integral closure device of rigid frame bridge side span |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922070476.3U CN211596419U (en) | 2019-11-26 | 2019-11-26 | Integral closure device of rigid frame bridge side span |
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| CN211596419U true CN211596419U (en) | 2020-09-29 |
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| CN201922070476.3U Active CN211596419U (en) | 2019-11-26 | 2019-11-26 | Integral closure device of rigid frame bridge side span |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512944A (en) * | 2021-04-13 | 2021-10-19 | 中交二公局东萌工程有限公司 | Rigid frame bridge side span construction method using bracket and hanging basket |
| CN115491990A (en) * | 2022-09-26 | 2022-12-20 | 中国十九冶集团有限公司 | Construction method for side-span cast-in-place section concrete pouring of continuous rigid frame bridge |
-
2019
- 2019-11-26 CN CN201922070476.3U patent/CN211596419U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113512944A (en) * | 2021-04-13 | 2021-10-19 | 中交二公局东萌工程有限公司 | Rigid frame bridge side span construction method using bracket and hanging basket |
| CN115491990A (en) * | 2022-09-26 | 2022-12-20 | 中国十九冶集团有限公司 | Construction method for side-span cast-in-place section concrete pouring of continuous rigid frame bridge |
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