CN110499708B - Bridge girder erection machine for synchronously installing prefabricated bridge Liang Duokua and installation method thereof - Google Patents
Bridge girder erection machine for synchronously installing prefabricated bridge Liang Duokua and installation method thereof Download PDFInfo
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- CN110499708B CN110499708B CN201910750285.3A CN201910750285A CN110499708B CN 110499708 B CN110499708 B CN 110499708B CN 201910750285 A CN201910750285 A CN 201910750285A CN 110499708 B CN110499708 B CN 110499708B
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000009434 installation Methods 0.000 title abstract description 29
- 238000010276 construction Methods 0.000 claims abstract description 23
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 abstract description 3
- 210000001364 upper extremity Anatomy 0.000 description 9
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a bridge girder erection machine for synchronously installing prefabricated bridges Liang Duokua and an installation method thereof, comprising the following steps: a main beam; the rear main crown block, the middle main crown block and the front main crown block can hoist heavy components; the rear supporting leg is supported on the bridge deck; a first middle leg and a second middle leg secured to the support structure; the first front supporting leg and the second front supporting leg are supported on the pier body bracket or the bearing platform. The invention realizes the matched construction of the consolidation of the supporting structure, the installation of the pier body and the installation of the segmental beam.
Description
Technical Field
The invention relates to the technical field of bridge engineering. More particularly, the present invention relates to a bridge girder erection machine for synchronously installing a prefabricated bridge Liang Duokua and an installation method thereof.
Background
Because most of the sections of the machine load project are in hills and water source protection areas, the prefabricated components and the feeding beams under the bridge cannot be guaranteed to be transported under the bridge, and the problems can be solved well only by feeding the beams at the tail of the bridge girder erection machine in a bridge deck transportation mode.
The problem of transportation and beam feeding can be well solved by adopting a common integrated bridge to install the prefabricated pier body and the section beam, but the problem of construction of the section beam is caused by unmatched pier body installation, pier top block consolidation and section beam installation effects when a conventional prefabricated bridge Liang Duokua is installed and erected synchronously by using a bridge girder erection machine, and the prefabricated pier body, the pier top block or the capping beam, the section beam and the like are not suitable for installation of the prefabricated pier body, the pier top block or the capping beam, the section beam and the like.
Disclosure of Invention
The invention aims to provide a bridge girder erection machine for synchronously installing a prefabricated bridge Liang Duokua and an installation method thereof, which realize the matched construction of the consolidation of a supporting structure, the installation of a pier body and the installation of a section girder.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a pre-assembled bridge Liang Duokua synchronous installation bridge girder erection machine, comprising:
A main beam;
the rear main crown block, the middle main crown block and the front main crown block can hoist heavy components;
The rear supporting leg is supported on the bridge deck;
a first middle leg and a second middle leg secured to the support structure;
the first front supporting leg and the second front supporting leg are supported on the pier body bracket or the bearing platform.
Preferably, the method further comprises: a rear trolley and a front trolley.
Preferably, the main beam is of truss or box section structure.
Preferably, the second front leg is foldable.
Preferably, the second front leg is driven to move on the main beam by a driving device, and the driving device comprises:
The sliding grooves are oppositely arranged on two side surfaces of the lower end of the main beam;
The screw rods are fixed in the pair of sliding grooves and are driven to rotate by the motor; and
A pair of ball nuts respectively arranged on the pair of screw rods;
the second front supporting leg is detachably connected with the ball nut through a bolt.
The invention also provides a method for synchronously installing the bridge girder erection machine by utilizing the prefabricated bridge Liang Duokua, which comprises the following steps of: the installation of the N1 pier body, the N1 supporting structure and the N1 section beam is completed, the installation of the N2 pier body and the N2 supporting structure is completed, and the installation of the N3 pier body is completed, and the method comprises the following steps:
Step one, mounting an N3 supporting structure on a rear main crown block, and mounting an N4 pier body on a front main crown block and a middle main crown block;
And step two, after the middle main crown block is provided with the N4 pier body, the N2 section beam is arranged in cooperation with the rear main crown block, at the moment, the N4 pier body is grouted, the strength is equal, and the N3 support structure (comprising the pier top block solidified by the section Liang Dunliang for secondary pouring construction, namely steel bar binding, mold closing, concrete pouring and equal strength, or prefabricated capping beam installation, cast-in-situ capping beam construction and the like) is formed.
Step three, synchronously installing a bridge girder erection machine by the prefabricated bridge Liang Duokua towards the bridge girder erection direction;
step four, comprising:
step 41, the first front supporting leg moves forward and is supported on an N5 bearing platform or pier body brackets;
Step 42, constructing an N1 and N2 closure wet joint;
step five, including:
Step 51, folding a second front supporting leg, moving the second front supporting leg forwards, crossing the N4 pier body, and then putting down the second front supporting leg, and supporting the second front supporting leg on an N4 bearing platform or a pier body bracket;
And 52, carrying out next round of construction, installing an N4 supporting structure and an N5 pier body, and simultaneously penetrating a pre-stress beam, and stretching the NI and N2 closure wet joint.
Preferably, in the first step, the pier body and the supporting structure are transported by a girder transporting vehicle, and the pier body and the supporting structure are transported to a girder feeding device at the tail part of the bridge girder erection machine by adopting an under-bridge girder feeding device or a bridge deck.
Preferably, the support structure is a capping beam or pier top.
Preferably, the third step includes:
Step 31, lifting and moving the second middle supporting leg to an N3 supporting structure;
step 32, the second front supporting leg moves forward to an N4 bearing platform or pier body bracket and is temporarily connected with the first front supporting leg;
Step 33, the main beam and rear leg are advanced over the span.
Preferably, in the fifth step, the method further includes:
And 53, after closure tensioning of the NI and the N2 is completed, carrying out next circulation construction on the NI-N2 section under the girder transporting condition.
The invention at least comprises the following beneficial effects: the pier body is installed and separated from pier top block construction, so that the problem of unmatched effects is solved. The prefabricated and installed integrated construction of the pier body, the pier top block or the capping beam and the segmental beam is realized, the bridge construction assembly rate is greatly improved, and compared with the traditional cast-in-situ process, the prefabricated and installed integrated construction of the pier body, the pier top block or the capping beam and the segmental beam is higher in efficiency, more optimized in environment and greatly improved in working environment of workers. The method is suitable for bridge construction with span ranging from 30m to 70m, and the construction work efficiency can reach 8 days/span.
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 diagram of a pre-assembled bridge Liang Duokua in a synchronous installation bridge girder erection machine;
FIG. 2 is a schematic illustration of a beam truck transporting prefabricated component (including pier bodies, section beams, etc.);
FIG. 3 is a schematic diagram of a front main crown block and a middle main crown block lifting and conveying N4 left pier body;
FIG. 4 is a schematic diagram of the N4 pier body after installation;
FIG. 5 is a schematic view of a middle and rear main crown blocks transporting stage beams;
FIG. 6 is a schematic illustration of a second middle leg lifting movement onto an N3 pier top block;
FIG. 7 is a schematic view of the second front leg being advanced onto the N4 platform;
FIG. 8 is a schematic view of a pre-assembled bridge Liang Duokua after the bridge girder erection machine is installed in synchronization with the bridge girder erection direction;
FIG. 9 is a schematic view of the first front leg being advanced and the second front leg being folded;
Fig. 10 is a schematic view of the second front leg advanced.
1 Main beam, 2 rear small crown block, 3 front small crown block, 4 rear main crown block, 5 middle main crown block, 6 front main crown block, 7 rear supporting leg, 8 first middle supporting leg, 9 second middle supporting leg, 10 first front landing leg, 11 second front landing leg, 12 N1 pier body, 13 N2 pier top block, 14 N2 segment beam, 15 beam truck, 16 N4 pier top block, 17 N5 pier body.
Detailed Description
The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
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.
The bridge girder erection machine for synchronously installing the prefabricated bridge Liang Duokua is suitable for erecting prefabricated pier bodies, capping beams, section beams or combined beams and the like.
As shown in fig. 1, the present invention provides a bridge girder erection machine for synchronously installing a prefabricated bridge Liang Duokua, comprising:
A main beam;
The rear main crown block, the middle main crown block and the front main crown block are used for hoisting heavy components. The main crown block is the main hoisting machinery of the bridge girder erection machine, and is used for hoisting heavy components such as a girder body, a pier body, a middle supporting leg and the like.
And the rear supporting leg is supported on the bridge deck and is a stressed member of the supporting frame bridge machine.
The first middle supporting leg and the second middle supporting leg are fixed on a supporting structure, and the middle supporting leg is a main stressed member of the supporting frame bridge crane.
The first front supporting leg and the second front supporting leg are supported on the bearing platform. The front supporting leg is a stressed member of the supporting frame bridge machine.
In a preferred embodiment of the prefabricated bridge Liang Duokua synchronous installation bridge girder erection machine, the rear trolley and the front trolley are light components which are hoisted below 20t, and the prefabricated bridge girder erection machine has the characteristics of flexibility, portability and high efficiency.
In a preferred embodiment of the prefabricated bridge Liang Duokua synchronous installation bridge girder erection machine of the present application, the girder is in a truss or box type cross-sectional structure.
In a preferred embodiment of the pre-assembled bridge Liang Duokua synchronous installation bridge girder erection machine of the present application, the second front leg is foldable.
In a preferred embodiment of the synchronous installation bridge girder erection machine for the prefabricated bridge Liang Duokua of the present application, the second front leg is driven to move on the girder by a driving device, and the driving device includes:
The sliding grooves are oppositely arranged on two side surfaces of the lower end of the main beam;
The screw rods are fixed in the pair of sliding grooves and are driven to rotate by the motor; and
A pair of ball nuts respectively arranged on the pair of screw rods;
the second front supporting leg is detachably connected with the ball nut through a bolt.
In the technical scheme, the screw rod can rotate to drive the ball nut to do linear motion on the screw rod, so that the second front supporting leg is driven to move on the main beam, the main crown block is not required to hoist the second front supporting leg, and convenience and rapidness are realized.
The method for synchronously installing the bridge girder erection machine by utilizing the prefabricated bridge Liang Duokua comprises the following steps of: the installation of the N1 pier body, the N1 pier top block and the N1 section beam is completed, the installation of the N2 pier body and the N2 pier top block is completed, and the installation of the N3 pier body is completed, and the method comprises the following steps:
Step one, as shown in figures 3-4, lifting and conveying the pier body on the left side of the N4 by using a front main crown block and a middle main crown block, and temporarily storing the pier body between N3-N4 spans; after the right side N4 pier body is transported to the N3-N4 span, the rear main crown block is provided with an N3 pier top block, and the front main crown block and the rear main crown block are provided with the right side N4 pier body and the left side N4 pier body in sequence.
Step two, as shown in fig. 5, after the middle main crown block is installed with the N4 pier body, the main crown block is matched with the middle main crown block to install the segment beam with the N2 section, at the moment, the N4 pier body is grouted and has equal strength, and the N3 supporting structure is constructed (including secondary pouring construction of pier top blocks with segments Liang Dunliang being solidified, namely, steel bar binding, mold closing, concrete pouring and equal strength, or prefabricated capping beam installation, or cast-in-situ capping beam construction, etc.).
Step three, synchronously installing a bridge girder erection machine by the prefabricated bridge Liang Duokua towards the bridge girder erection direction;
step four, comprising:
Step 41, as shown in fig. 9, the first front supporting leg moves forward and is supported on the N5 bearing platform;
Step 42, constructing an N1 and N2 closure wet joint;
step five, including:
Step 51, as shown in fig. 10, the second front supporting leg is folded, and the second front supporting leg moves forward, spans the N4 pier body and then is put down to be supported on the N4 bearing platform;
Step 52, performing next round of construction, installing an N4 pier top block and an N5 pier body, and simultaneously, penetrating a pre-stress beam, and stretching an NI and N2 closure wet joint;
the main core principle of the installation method for synchronously installing the bridge girder erection machine by utilizing the prefabricated bridge Liang Duokua is that the bridge girder erection machine is provided with 3.5 spans, the prefabricated pier body installation, the supporting structure construction and the segmental girder assembly construction (or the structural forms such as the superposed girder, the combined girder and the like) are separated, and the efficiency is greatly improved by running water construction in each working procedure.
In a preferred embodiment of the method for synchronously installing a bridge girder erection machine using the prefabricated bridge Liang Duokua of the present application, the second front leg is advanced by using a driving device. According to the scheme, the problems that the beam is stressed and deformed greatly and the requirements on strength and rigidity are high due to the fact that N3-N5 spans about 100 meters simply support span in the working condition are solved, the second front supporting leg does not need to be hoisted by a main crown block in the moving process through the driving device, and the load is greatly reduced.
In a preferred embodiment of the method for synchronously installing a bridge girder erection machine by using the prefabricated bridge Liang Duokua according to the present application, as shown in fig. 2, the pier body and the supporting structure are transported by using a girder transporting vehicle, and the girder is fed under the bridge or by using a girder feeding vehicle at the tail.
In a preferred embodiment of the method of the present application for synchronously installing a bridge girder erection machine using the prefabricated bridge Liang Duokua, the supporting structure is a capping beam or pier top block or other alternative structure, and is not limited to these two structures.
In a preferred embodiment of the method for synchronously installing a bridge girder erection machine by using the prefabricated bridge Liang Duokua of the present application, the third step includes:
step 31, as shown in fig. 6, the second middle supporting leg is hoisted and moved to the N3 pier top block;
Step 32, as shown in fig. 7, the second front supporting leg is moved forward onto the N4 bearing platform and is temporarily connected with the first front supporting leg;
step 33, as shown in fig. 8, the main beam and rear leg are advanced over the span.
In a preferred embodiment of the construction method for installing the prefabricated bridge by using the prefabricated bridge Liang Duokua and synchronously installing the bridge girder erection machine of the present application, the fifth step further includes:
And 53, after closure tensioning of the NI and the N2 is completed, carrying out next circulation construction on the NI-N2 section under the girder transporting condition.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown, it is well suited to various fields of use for which the invention is suited, and further modifications may be readily made by one skilled in the art, and the invention is therefore not to be limited to the particular details and examples shown and described herein, without departing from the general concepts defined by the claims and the equivalents thereof.
Claims (5)
1. A method for synchronously installing a bridge girder erection machine by using a prefabricated bridge Liang Duokua, wherein the bridge girder erection machine comprises the following steps: a main beam; the rear main crown block, the middle main crown block and the front main crown block can hoist heavy components; the rear supporting leg is supported on the bridge deck; a first middle leg and a second middle leg secured to the support structure; the first front supporting leg and the second front supporting leg are supported on the pier body bracket or the bearing platform;
along the bridge erection direction, during the initial working condition: the method is characterized by comprising the following steps of:
Step one, mounting an N3 supporting structure on a rear main crown block, and mounting an N4 pier body on a front main crown block and a middle main crown block;
Step two, after the middle main crown block is provided with the N4 pier body, the N2 section of segment beam is arranged in cooperation with the rear main crown block, and the N4 pier body is grouted, and is of equal strength, and the N3 supporting structure is constructed;
step three, synchronously installing a bridge girder erection machine by the prefabricated bridge Liang Duokua towards the bridge girder erection direction;
step four, comprising:
step 41, the first front supporting leg moves forward and is supported on an N5 bearing platform or pier body brackets;
Step 42, constructing an N1 and N2 closure wet joint;
step five, including:
Step 51, folding a second front supporting leg, moving the second front supporting leg forwards, crossing the N4 pier body, and then putting down the second front supporting leg, and supporting the second front supporting leg on an N4 bearing platform or a pier body bracket;
And 52, carrying out next round of construction, installing an N4 supporting structure and an N5 pier body, and simultaneously penetrating a pre-stress beam, and stretching the NI and N2 closure wet joint.
2. The method for synchronously installing a bridge girder erection machine by using a prefabricated bridge Liang Duokua according to claim 1, wherein the pier body and the supporting structure are transported by a girder transporting vehicle in the first step, and are transported to a tail girder feeding of the bridge girder erection machine by using an under-bridge girder feeding or a bridge deck.
3. The method of installing a bridge girder erection machine synchronously with the use of the prefabricated bridge Liang Duokua according to claim 1, wherein the supporting structure is a bent cap or pier top.
4. The method for synchronously installing a bridge girder erection machine by using the prefabricated bridge Liang Duokua according to claim 1, wherein the step three comprises:
Step 31, lifting and moving the second middle supporting leg to an N3 supporting structure;
step 32, the second front supporting leg moves forward to an N4 bearing platform or pier body bracket and is temporarily connected with the first front supporting leg;
Step 33, the main beam and rear leg are advanced over the span.
5. The method for synchronously installing a bridge girder erection machine by using a prefabricated bridge Liang Duokua according to claim 1, wherein in the fifth step, further comprising:
And 53, after closure tensioning of the NI and the N2 is completed, carrying out next circulation construction on the NI-N2 section under the girder transporting condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910750285.3A CN110499708B (en) | 2019-08-14 | Bridge girder erection machine for synchronously installing prefabricated bridge Liang Duokua and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910750285.3A CN110499708B (en) | 2019-08-14 | Bridge girder erection machine for synchronously installing prefabricated bridge Liang Duokua and installation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110499708A CN110499708A (en) | 2019-11-26 |
| CN110499708B true CN110499708B (en) | 2024-07-05 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208478A (en) * | 2017-06-30 | 2019-01-15 | 中交第二航务工程局有限公司 | A kind of prefabricated assembled bridge integration rapid constructing method |
| CN210766418U (en) * | 2019-08-14 | 2020-06-16 | 中交第二航务工程局有限公司 | Prefabricated assembled bridge multi-span synchronous mounting bridge girder erection machine |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109208478A (en) * | 2017-06-30 | 2019-01-15 | 中交第二航务工程局有限公司 | A kind of prefabricated assembled bridge integration rapid constructing method |
| CN210766418U (en) * | 2019-08-14 | 2020-06-16 | 中交第二航务工程局有限公司 | Prefabricated assembled bridge multi-span synchronous mounting bridge girder erection machine |
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