CN113944103A - Assembled support device applied to installation of steel box girder road-crossing bridge and construction method - Google Patents
Assembled support device applied to installation of steel box girder road-crossing bridge and construction method Download PDFInfo
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- CN113944103A CN113944103A CN202111232011.9A CN202111232011A CN113944103A CN 113944103 A CN113944103 A CN 113944103A CN 202111232011 A CN202111232011 A CN 202111232011A CN 113944103 A CN113944103 A CN 113944103A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The invention discloses an assembled bracket device applied to installation of a steel box girder road-crossing bridge and a construction method, and belongs to the technical field of bridge steel box girder installation construction. The device comprises a first bracket, an adjusting pier and a second bracket, wherein the first bracket can be fixed on the ground and form a supporting surface; the extension length of the top end and the bottom end of the adjusting pier in the vertical direction can be changed, and the bottom end of the adjusting pier is fixedly connected to the supporting surface; the second support is connected with the top end of the adjusting pier in a separable transmission mode, and the bottom end of the second support is provided with a supporting roller. According to the device, the existing bridge body is perforated, so that a second support which spans the existing bridge body structure to be installed and constructed can penetrate through the bridge body by using the adjusting pier, and the ground below the bridge body is used as a supporting foundation by means of the first support, so that the installation accuracy of the steel box girder and the safety of the bridge body are guaranteed; the second support can be installed and dismantled fast with adjusting between the mound, and the second support can conveniently accomplish the sideslip and unload based on the pontic structure and fall, and the turnover rate is high, further reduces the influence to existing pontic.
Description
Technical Field
The invention relates to the technical field of bridge steel box girder installation construction, in particular to an assembled bracket device applied to installation of a steel box girder road-crossing bridge and a construction method.
Background
At present, the mainstream construction method for installing the steel box girder comprises a bracket method and a pushing method. The support method is suitable for construction conditions of flat bridge site terrain and short pier body, and has strong applicability to indexes such as longitudinal slopes, flat curves and the like of the steel box girder; the pushing law has low requirements on installation environment, but has poor applicability to the situation that the radius of a variable-section steel box girder or a bridge longitudinal slope and a flat curve is changed, and meanwhile, when the span of the steel box girder on a single bridge span of a pier is large, a temporary support in a support method needs to be combined for supporting and transition.
In the prior art, in some cross construction sections such as expressways, steel box girder construction of roads and bridges needs to be carried out across the road bridges already passing through from the top, and in such a situation, the steel box girder installation is generally carried out by adopting a pushing method so as to reduce the influence on the existing road bridge structure and the passing of vehicles. However, when the upper-span steel box girder has a variable cross-section structure, the pushing method cannot be applied, and a bracket method is required. When the temporary support in the support method is directly erected on the road surface of the traffic bridge, due to the vibration of the traveling structure, the synchronous vibration of the temporary support cannot guarantee the installation precision of the steel box girder and the structural safety of the traffic bridge, and if the traffic bridge is reinforced, the construction investment is large, and the temporary reinforcing effect cannot be guaranteed.
Disclosure of Invention
Therefore, the invention provides an assembled bracket device applied to installation of a steel box girder road-crossing bridge and a construction method, and aims to solve the technical problems that when a variable-section steel box girder needs to cross a passing highway bridge in the prior art, the construction difficulty is high, the safety is low and the construction effect is poor through a traditional bracket method.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides a be applied to assembled bracket device of steel box girder installation of striding road bridge, the road bridge has been seted up vertical extension installation passageway, assembled bracket device includes:
a first bracket which can be fixed to the ground and forms a support surface; and
the adjusting pier penetrates through the extending installation channel, the extending length of the top end and the bottom end of the adjusting pier in the vertical direction can be changed, and the bottom end of the adjusting pier is fixedly connected to the supporting surface; and
the second support is in separable transmission connection with the top end of the adjusting pier, and a supporting roller vertically corresponding to the road bridge is arranged at the bottom end of the second support; the bottom end of the supporting roller is lower than the top end of the adjusting pier.
On the basis of the above technical solution, the present invention is further explained as follows:
as a further scheme of the invention, the first support comprises a plurality of first upright posts.
The first stand column is vertically extended and is fixedly connected to a concrete foundation poured to the ground in a one-to-one separable mode along one end of the first stand column in the extending direction, and a supporting surface is formed at the other end of the first stand column in the extending direction.
As a further scheme of the present invention, a plurality of first connecting plate groups located at the same height are fixedly connected to outer side walls of the plurality of first columns, and each first connecting plate group includes two first connecting plates that are vertically corresponding and have different heights.
And the first connecting plates are fixedly connected with a first parallel connection.
Locate arbitrary adjacent two first stand, and be located two of co-altitude not the rigid coupling has first bracing between the first connecting plate.
As a further aspect of the invention, the adjustment pier comprises an adjustment column and a split jack.
The extending direction of the adjusting upright post is the same as that of the first upright post.
The base mounting end of the separated jack is fixedly connected with the bearing surface of the first upright post, and the kinetic energy output end of the separated jack is in transmission connection with one end, facing the first upright post, of the adjusting upright post.
The adjusting upright post penetrates through the extending installation channel, and one end of the adjusting upright post, which deviates from the first upright post, is connected with the second support in a separable transmission manner.
As a further aspect of the invention, the adjustment pier further comprises a positioning sleeve having the same extension direction as the first upright.
The positioning sleeve deviates from one end of the first stand column and is fixedly connected between the adjusting stand columns, the positioning sleeve deviates from one end of the adjusting stand column and is sleeved on the first stand column in a sliding mode, and the positioning sleeve is located on the outer side of the separated jack.
The separated jack is provided with a jack wiring end, and the outer wall of the tube body of the positioning sleeve is provided with a pipeline channel corresponding to the jack wiring end.
As a further aspect of the present invention, the second bracket includes a plurality of second pillars.
The extending direction of the second stand column is the same as the extending direction of the first stand column, and the second stand column is connected with the separable transmission of one end of the adjusting stand column deviating from the first stand column.
As a further scheme of the present invention, a plurality of second connection plate groups located at the same height are fixedly connected to outer side walls of the plurality of second columns, and each second connection plate group includes two second connection plates that are vertically corresponding and have different heights.
And the second parallel connection is fixedly connected between the two second connecting plates which are arranged at the same height.
And the second connecting plates are fixedly connected with second inclined struts.
The supporting roller is assembled at the second parallel bottom with low height, and the bottom end of the supporting roller is lower than the connecting position of the second upright post and the adjusting upright post.
The mounting construction method utilizes the assembled bracket device applied to mounting the steel box girder bridge spanning road, and comprises the following steps:
s1: pouring a support concrete foundation against the foundation at the bottom of the pre-installation position of the steel box girder;
s2: installing a first bracket based on a concrete foundation;
s3: mounting an adjusting pier penetrating through a road bridge at the top of the first support;
s4: assembling a second support, and integrally hoisting the assembled and molded second support to an adjusting pier;
s5: and the adjusting pier lifts the second support to enable the second support to reach the designed elevation.
The unloading construction method utilizes the assembled bracket device applied to the installation of the steel box girder bridge spanning road, and comprises the following steps:
s1: the height of the adjusting pier is adjusted to descend, so that the second support falls to the road bridge;
s2: removing the connection between the second support and the adjusting pier, transversely moving the second support out of the bottom of the installed steel box girder, and integrally hoisting the second support out of the bridge area;
s3: hoisting and removing the adjusting piers one by one;
s4: detaching a separate jack in the adjusting pier from the first support;
s5: and removing the first support on site and breaking the concrete foundation.
Further, step S1 specifically includes:
after the steel box girder is constructed and installed, the kinetic energy output end of the separated jack in the adjusting pier is controlled by the host to descend, so that the second upright post in the second support, the second parallel connection and a plurality of supporting rollers at the bottom end of the second parallel connection are driven to fall to the bridge wing plate bridge floor of the existing road bridge.
Step S2 specifically includes:
and removing the fixed connection effect of a flange plate between the second upright post and the adjusting pier to separate the second support, integrally and transversely moving the second support to the outside of the projection range of the installed steel box girder based on the bridge structure by means of a plurality of supporting rollers, and integrally hoisting the second support to the outside of the bridge area by using a truck crane for dismantling.
The invention has the following beneficial effects:
1. according to the device, the holes are formed in the wing plates of the existing bridge structure, so that a second support which spans the existing bridge structure for installation and construction can penetrate through the bridge structure by using the adjusting piers and the first support, and the first support is used as a supporting foundation by using the solid ground below the bridge structure, so that the installation accuracy of the steel box girder and the safety of the through bridge structure are guaranteed; the second support can be installed and dismantled fast with adjusting between the mound, and the second support can conveniently accomplish the sideslip and unload based on the pontic structure and fall, and the turnover rate is high, further reduces the influence to existing pontic structure.
2. The manufacturing materials related to the device can be directly common materials in engineering, and the device has no special structural shape, is convenient to obtain materials and is simple to process.
Drawings
In order to clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly introduced, and the structures, the proportions, the sizes, and the like shown in the specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the modifications of any structures, the changes of the proportion relationships, or the adjustments of the sizes, without affecting the functions and the achievable purposes of the present invention, and still fall within the scope of the technical contents disclosed in the present invention.
Fig. 1 is an overall front view structural schematic diagram of an assembled bracket device applied to installation of a steel box girder bridge spanning structure according to an embodiment of the present invention.
Fig. 2 is a schematic overall side view of an assembled bracket device applied to installation of a steel box girder bridge spanning structure according to an embodiment of the present invention.
Fig. 3 is a schematic view of an installation structure of a first bracket and an adjusting pier in an assembled bracket device applied to installation of a steel box girder bridge spanning road provided by the embodiment of the invention.
Fig. 4 is a schematic view of an installation structure of an adjustment pier in an assembled bracket device applied to installation of a steel box girder bridge spanning road provided by the embodiment of the invention.
Fig. 5 is a schematic view of an installation structure of a second bracket in an assembled bracket device applied to installation of a steel box girder bridge spanning road provided by the embodiment of the invention.
Fig. 6 is a schematic sectional structure view of an assembled bracket device applied to installation of a steel box girder bridge spanning structure in fig. 4 at a-a according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
a concrete foundation 1;
first support 2: the first upright post 21, the first connecting plate 22, the first parallel connection 23, the first inclined strut 24 and the first connecting flange 25;
adjusting the pier 3: the adjusting column 31, the second connecting flange 32, the split jack 33, the jack connecting terminal 331, the lower support plate 332, the upper support plate 333, the positioning sleeve 34, the sleeve welding terminal 341, the pipeline channel 342 and the stiffening plate 35;
the second bracket 4: a second upright column 41, a third connecting flange 42, a second connecting plate 43, a second parallel connection 44, a second inclined strut 45, a supporting roller 46, a column top cross beam 47 and a cross slope adjusting block 48;
bridge structure 5: bridge strake 51, extension installation channel 52, hard isolation 53.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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 invention.
In the present specification, the terms "upper", "lower", "left", "right" and "middle" are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical change.
As shown in fig. 1 to 6, an embodiment of the present invention provides an assembled bracket device applied to installation of a steel box girder bridge spanning road, which includes a concrete foundation 1, a first bracket 2, an adjusting pier 3 and a second bracket 4, which are assembled and connected in sequence from bottom to top; the second support 4 used for installing and constructing the existing bridge structure 5 by punching a wing plate of the existing bridge structure 5 can penetrate through the bridge structure 5 by utilizing the adjusting piers 3 and the first support 2, and takes the solid ground below the bridge structure 5 as a supporting foundation by virtue of the first support 2, so that the installation precision of the steel box girder and the safety of the bridge structure 5 are effectively ensured; simultaneously, can realize quick ann and tear open between second support 4 and the regulation mound 3, and second support 4 can conveniently accomplish the sideslip and unload based on the pontic structure 5, and the turnover rate is high, further reduces the influence to existing pontic structure 5. The specific settings are as follows:
as shown in fig. 1 to 3, the first bracket 2 includes a plurality of first vertical columns 21 and a plurality of first connecting flanges 25; the first upright posts 21 are vertically extended and the ends of the first upright posts 21 in the extending direction are correspondingly fixedly connected with the concrete foundation 1 through the first connecting flanges 25, and the concrete foundation 1 is poured and fixed to the solid ground outside.
The outer side walls of the first upright posts 21 are fixedly connected with a plurality of first connecting plate 22 groups located at the same height, and each first connecting plate 22 group comprises two vertically corresponding first connecting plates 22 with different heights; the first connecting plates 22 are arranged on any two adjacent first upright columns 21, and a first parallel connection 23 is fixedly connected between the two first connecting plates 22 at the same height through bolts; the first connecting plates 22 are fixedly connected with first inclined struts 24 through bolts, and the first inclined struts are arranged between any two adjacent first columns 21 and located at different heights. The first horizontal connection 23 and the first inclined strut 24 are respectively connected with the first upright post 21 to form a plurality of triangular supporting structures, and then the first support 2 with strong stability is formed to be used as a bearing foundation.
As shown in fig. 1 to 2, a plurality of adjusting piers 3 are provided, the bottom ends of the plurality of adjusting piers 3 are respectively and correspondingly provided at the other ends of the plurality of first upright posts 21 along the extending direction thereof, and the second support 4 is provided at the top end of the adjusting pier 3, so as to achieve the function of adjusting the supporting height of the second support 4 through the adjusting piers 3; a plurality of first stand 21 all is located the below of pontic structure 5 along its extending direction's the other end, second support 4 is located pontic structure 5's top to this is convenient for first support 2 more and demolishs the operation and guarantees that second support 4 can fall to pontic structure 5 bridge floor in the same direction as a lesson and dismantle and remove.
Specifically, as shown in fig. 3 to 4, the bridge structure 5 includes a bridge wing plate 51 and an extended installation channel 52 opened in the bridge wing plate 51. The adjusting pier 3 comprises an adjusting upright column 31 and a separate jack 33; wherein the extension direction of the adjusting upright column 31 is the same as the extension direction of the first upright column 21; the basis installation end rigid coupling of disconnect-type jack 33 in first stand 21 is along its extending direction's the other end, disconnect-type jack 33's kinetic energy output with adjust stand 31 orientation the one end transmission of first stand 21 links to each other, it passes to adjust stand 31 extend installation passageway 52 for it goes up and down in order to accomplish the altitude mixture control to second support 4 to drive through disconnect-type jack 33 output kinetic energy, through the demolition or the construction operation of different highly flexible adaptation second supports 4.
Preferably, the adjustment pier 3 further comprises a positioning sleeve 34 having the same extension direction as the first upright 21; a sleeve welding end 341 is arranged between one end of the positioning sleeve 34, which is away from the first upright post 21, and the adjusting upright post 31, and the positioning sleeve 34 is fixedly connected with the adjusting upright post 31 through the sleeve welding end 341; one end of the positioning sleeve 34 departing from the adjusting column 31 is slidably sleeved on the first column 21, and the positioning sleeve 34 is located outside the separate jack 33. Be used for forming vertical mutual limiting displacement between adjusting stand 31 and first stand 21 through position sleeve 34, effectively guaranteed to adjust stand 31 based on the vertical lift supporting stability of first stand 21, can also play safeguard function to its inboard disconnect-type jack 33 with the help of position sleeve 34 simultaneously.
The split jack 33 has a jack terminal 331, and the outer wall of the tube body of the positioning sleeve 34 is provided with a pipeline channel 342 corresponding to the jack terminal 331, so that the cable of the split jack 33 can pass through the pipeline channel 342 to be electrically connected with the host.
More preferably, a lower support plate 332 is fixedly connected between the base installation end of the split jack 33 and the first upright post 21, an upper support plate 333 is fixedly connected to the kinetic energy output end of the split jack 33, and a stiffening plate 35 is fixedly connected between the inner cavity wall of the pipe body of the positioning sleeve 34 and the adjusting upright post 31, so as to further effectively improve the overall comprehensive performance of the adjusting pier 3.
As shown in fig. 4 to 6, a second connecting flange 32 is further provided at an end of the adjusting column 31 facing away from the first column 21. The second bracket 4 comprises a plurality of second upright columns 41, a plurality of third connecting flanges 42, a plurality of supporting rollers 46 and a column top cross beam 47; the extending direction of the plurality of second upright columns 41 is the same as the extending direction of the plurality of first upright columns 21, and one end of each second upright column 41 facing the adjusting upright column 31 is fixedly assembled with the second connecting flange 32 through the plurality of third connecting flanges 42 in a one-to-one correspondence manner; a plurality of second connecting plate 43 groups located at the same height are fixedly connected to the outer side walls of the plurality of second upright columns 41, and each second connecting plate 43 group comprises two second connecting plates 43 which vertically correspond to each other and have different heights; wherein, two second connecting plates 43 arranged on any two adjacent second upright columns 41 and located at the same height are fixedly connected with a second parallel connection 44 through bolts; and second inclined struts 45 are fixedly connected between the two second connecting plates 43 at different heights and arranged on any two adjacent second upright columns 41. The second horizontal connection 44 and the second inclined strut 45 are respectively connected with the second upright post 41 to form a plurality of groups of triangular supporting structures, and then the second support 4 with strong stability is formed to smoothly complete the installation and construction operation of the steel box girder.
A plurality of supporting roller 46 assembles respectively in the low height second parallel connection 44 bottom, and a plurality of supporting roller 46 bottom elevation is less than elevation at the bottom of third flange 42 for after falling second support 4 to the top bridge floor of pontic structure 5 through adjusting mound 3, take the lead to the bridge floor by supporting roller 46, after third flange 42's rigid coupling effect has been relieved, can conveniently with the help of supporting roller 46 with the sideslip steel box girder erection range of second support 4, carry out integral hoisting again and demolish, promoted functional practicality.
The top beam 47 is fixedly connected to the tops of the second columns 41, and the top end of the top beam 47 is further fixedly connected with a plurality of cross slope adjusting blocks 48 for steel box girder construction and installation.
The installation and construction method of the assembled bracket device applied to installation of the steel box girder bridge across the road in the embodiment specifically comprises the following steps:
s1: the bottom of the pre-installation position of the bridge steel box girder is opposite to the foundation to pour the support concrete foundation 1;
s2: installing a first bracket 2 based on the concrete foundation 1;
the method specifically comprises the following steps: the bottom ends of a plurality of first upright posts 21 in the first support 2 are fixedly installed on the concrete foundation 1 through first connecting flanges 25 respectively by adopting a truck-mounted crane and manual matching, and a first parallel connection 23 and a first inclined support 24 are installed between the first upright posts 21 respectively, so that the first support 2 is assembled and molded.
S3: an adjusting pier 3 penetrating through an existing bridge body structure 5 is installed at the top of the first support 2;
the method specifically comprises the following steps: an extended installation channel 52 is arranged on a bridge wing plate 51 of the bridge body structure 5, and a hard isolation 53 is arranged between the bridge wing plate 51 and a traffic bridge floor, so that the adjusting upright column 31 in the adjusting pier 3 passes through the extended installation channel 52.
Fixing the base installation end of a separate jack 33 in the adjusting pier 3 to the top end of a first upright post 21 in the first support 2 in a bolt fixing mode, and supporting the kinetic energy output end of the separate jack 33 to the bottom end of an adjusting upright post 31; the lower part of a positioning sleeve 34 in the adjusting pier 3 is assembled with the first upright post 21 in a sliding way, and the upper part of the positioning sleeve 34 is welded and fixed with the adjusting upright post 31; the jack cable is threaded out through the line channel 342 reserved in the positioning sleeve 34 for electrical connection with the host.
S4: assembling the second support 4, and integrally hoisting the assembled and molded second support 4 to the adjusting pier 3;
the method specifically comprises the following steps: and respectively installing a second parallel connection 44 and a second inclined strut 45 between a plurality of second upright columns 41 in the second support 4 by adopting a truck-mounted crane and manual matching, installing a column top cross beam 47 and a cross slope adjusting block 48 at the tops of the plurality of second upright columns 41, installing a plurality of supporting rollers 46 on the second parallel connection 44 at the bottom, and enabling the bottom elevation of the supporting rollers 46 to be lower than that of the second upright columns 41 so as to assemble and form the second support 4.
And integrally hoisting the assembled and molded second support 4 to the adjusting pier 3, and correspondingly fixedly connecting the bottom end of the second upright post 41 with the second connecting flange 32 at the top end of the adjusting upright post 31 through the third connecting flange 42.
S5: the separate jack 33 is raised to bring the second support 4 to the design elevation.
The kinetic energy output end of the separate jack 33 is initially located at a low point, after the second support 4 is installed, the separate jack 33 jacks to enable the second support 4 to reach the bottom elevation of the steel box girder, and the steel box girder is installed.
The unloading construction method of the assembled bracket device applied to installation of the steel box girder bridge across the road in the embodiment specifically comprises the following steps:
s1: the height of the adjusting pier 3 is adjusted to descend, so that the second support 4 falls to the existing bridge structure 5;
the method specifically comprises the following steps: after the steel box girder is constructed and installed, the kinetic energy output end of the separated jack 33 in the adjusting pier 3 is controlled by the host to descend, so that the second upright column 41, the second parallel connection 44 and a plurality of supporting rollers 46 at the bottom end of the second parallel connection 44 in the second support 4 are driven to fall to the bridge wing plate 51 of the existing bridge body structure 5.
S2: the connection between the second support 4 and the adjusting pier 3 is removed, the second support 4 is moved out of the bottom of the installed steel box girder in a transverse mode, and the second support 4 is integrally hoisted to the outside of the bridge area;
the method specifically comprises the following steps: and (3) removing the fixed connection effect of the flange plate between the second upright post 41 and the adjusting pier 3 to separate the second support 4, manually transversely moving the second support 4 to the outside of the projection range of the installed steel box girder based on the bridge structure 5 by means of a plurality of supporting rollers 46, and hoisting the second support 4 to the outside of the bridge area by a truck crane to be dismantled.
S3: hoisting and removing the adjusting piers 3 one by one;
the method specifically comprises the following steps: the adjusting upright column 31, the positioning sleeve 34 and the associated structure in the adjusting pier 3 are lifted one by one to hang holes from the extending installation channel 52 of the existing bridge body structure 5 by means of a lifting ring through a truck-mounted crane, so that part of the structure of the adjusting pier 3 is lifted to the projection range of the steel box girder.
S4: removing the jack 33 in the adjustment pier 3 from the first support 2;
s5: the first support 2 is removed on site and the concrete foundation 1 is broken.
The method specifically comprises the following steps: and (3) removing the first support 2 under the existing bridge structure 5 in situ by adopting a conventional removing method, and clearing the site after the concrete foundation 1 is broken.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. An assembled bracket device applied to the installation of a steel box girder bridge across a road, the road and the bridge are provided with vertical extending installation channels, which is characterized in that,
the assembled bracket device comprises:
a first bracket which can be fixed to the ground and forms a support surface;
the adjusting pier penetrates through the extending installation channel, the extending length of the top end and the bottom end of the adjusting pier in the vertical direction can be changed, and the bottom end of the adjusting pier is fixedly connected to the supporting surface;
the second support is connected with the top end of the adjusting pier in a detachable transmission mode, supporting rollers vertically corresponding to the road bridge are arranged at the bottom end of the second support, and the height of the bottom end of each supporting roller is lower than that of the top end of the adjusting pier.
2. The assembled bracket device applied to the installation of the steel box girder bridge spanning road according to claim 1,
the first support comprises a plurality of first upright posts;
the first stand column is vertically extended and is fixedly connected to a concrete foundation poured to the ground in a one-to-one separable mode along one end of the first stand column in the extending direction, and a supporting surface is formed at the other end of the first stand column in the extending direction.
3. The assembled bracket device applied to the installation of the steel box girder bridge spanning road according to claim 2,
the outer side walls of the first upright columns are fixedly connected with a plurality of first connecting plate groups at the same height, and each first connecting plate group comprises two vertically corresponding first connecting plates with different heights;
a first parallel connection is fixedly connected between two first connecting plates which are arranged on any two adjacent first stand columns and are positioned at the same height;
locate arbitrary adjacent two first stand just is located two of co-altitude not the rigid coupling has first bracing between the first connecting plate.
4. The assembled bracket device applied to the installation of the steel box girder bridge spanning road according to claim 2,
the adjusting pier comprises an adjusting upright post and a separate jack;
the extending direction of the adjusting upright post is the same as that of the first upright post;
the base mounting end of the separate jack is fixedly connected to the bearing surface of the first upright post, and the kinetic energy output end of the separate jack is in transmission connection with one end, facing the first upright post, of the adjusting upright post;
the adjusting upright post penetrates through the extending installation channel, and one end of the adjusting upright post, which deviates from the first upright post, is connected with the second support in a separable transmission manner.
5. The assembled bracket device applied to the installation of the steel box girder bridge spanning road according to claim 4,
the adjusting pier further comprises a positioning sleeve which has the same extension direction with the first upright post;
one end of the positioning sleeve, which is far away from the first upright post, is fixedly connected with the adjusting upright post, one end of the positioning sleeve, which is far away from the adjusting upright post, is slidably sleeved on the first upright post, and the positioning sleeve is positioned on the outer side of the separated jack;
the separated jack is provided with a jack wiring end, and the outer wall of the tube body of the positioning sleeve is provided with a pipeline channel corresponding to the jack wiring end.
6. The assembled bracket device applied to the installation of the steel box girder bridge spanning road according to claim 4,
the second bracket comprises a plurality of second upright posts;
the extending direction of the second stand column is the same as the extending direction of the first stand column, and the second stand column is connected with the separable transmission of one end of the adjusting stand column deviating from the first stand column.
7. The assembled bracket device applied to the installation of the steel box girder bridge spanning road according to claim 6,
the outer side walls of the second upright columns are fixedly connected with a plurality of second connecting plate groups at the same height, and each second connecting plate group comprises two vertically corresponding second connecting plates with different heights;
a second parallel connection is fixedly connected between two second connecting plates which are arranged on any two adjacent second upright columns and are positioned at the same height;
a second inclined strut is fixedly connected between two second connecting plates which are arranged on any two adjacent second stand columns and are positioned at different heights;
the supporting roller is assembled at the second parallel bottom with low height, and the bottom end of the supporting roller is lower than the connecting position between the second upright post and the adjusting upright post.
8. An installation construction method by using the assembled bracket device applied to the installation of the steel box girder bridge spanning road according to claim 1, which is characterized by comprising the following steps:
s1: pouring a support concrete foundation against the foundation at the bottom of the pre-installation position of the steel box girder;
s2: installing a first bracket based on a concrete foundation;
s3: mounting an adjusting pier penetrating through a road bridge at the top of the first support;
s4: assembling a second support, and integrally hoisting the assembled and molded second support to an adjusting pier;
s5: and the adjusting pier lifts the second support to enable the second support to reach the designed elevation.
9. A drop-off construction method using the assembly type bracket device applied to the installation of a steel box girder bridge spanning structure according to claim 1, comprising the steps of:
s1: the height of the adjusting pier is adjusted to descend, so that the second support falls to the road bridge;
s2: removing the connection between the second support and the adjusting pier, transversely moving the second support out of the bottom of the installed steel box girder, and integrally hoisting the second support out of the bridge area;
s3: hoisting and removing the adjusting piers one by one;
s4: detaching a separate jack in the adjusting pier from the first support;
s5: and removing the first support on site and breaking the concrete foundation.
10. A drop off construction method according to claim 9,
step S1 specifically includes:
after the steel box girder is constructed and installed, the kinetic energy output end of a separated jack in the adjusting pier is controlled by the host to descend, so that a second upright post in the second support, a second parallel connection and a plurality of supporting rollers at the bottom end of the second parallel connection are driven to fall to a bridge wing plate bridge floor of the existing road bridge;
step S2 specifically includes:
and removing the fixed connection effect of a flange plate between the second upright post and the adjusting pier to separate the second support, integrally and transversely moving the second support to the outside of the projection range of the installed steel box girder based on the bridge structure by means of a plurality of supporting rollers, and integrally hoisting the second support to the outside of the bridge area by using a truck crane for dismantling.
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| CN113944103B (en) | 2023-04-07 |
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