CN111549675A - Construction method of sliding unlocking type temporary support for mounting prefabricated small box girder - Google Patents
Construction method of sliding unlocking type temporary support for mounting prefabricated small box girder Download PDFInfo
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- CN111549675A CN111549675A CN202010428467.1A CN202010428467A CN111549675A CN 111549675 A CN111549675 A CN 111549675A CN 202010428467 A CN202010428467 A CN 202010428467A CN 111549675 A CN111549675 A CN 111549675A
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- support
- temporary support
- small box
- box girder
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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
- E01D19/00—Structural or constructional details of 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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Abstract
The invention provides a construction method of a sliding unlocking type temporary support for mounting a prefabricated small box girder, which comprises the steps of reversely stacking a first support body of the temporary support on a second support body, arranging a first supporting surface of the first support body upwards, placing a first inclined surface of the first support body on a second inclined surface of the second support body, and connecting the first inclined surface and the second inclined surface through a connecting part; then placing the temporary support on the pier top capping beam; hoisting the prefabricated small box girder to a temporary support, and constructing a prefabricated small box girder cast-in-place end beam; after the beam at the cast-in-place end is finished, the temporary support is unlocked, the connecting component of the temporary support is firstly detached, then thrust is applied to one end of the first support body of the temporary support, the first support body is made to slide and dislocate relative to the second support body, the height of the first support body is lowered after the first support body slides, and the first support body is separated from the prefabricated small box girder, so that the stress of the prefabricated small box girder is converted into the stress of the permanent support. The invention effectively solves the problem that the temporary support is difficult to dismantle after the prefabricated small box girder is installed.
Description
Technical Field
The invention relates to the technical field of prefabricated small box girder installation temporary support construction in an assembly type bridge construction technology, in particular to a construction method of a sliding unlocking type temporary support for prefabricated small box girder installation.
Background
Along with the popularization of the prefabrication and assembly process in urban elevated bridges, a large number of bridge prefabricated components are applied to bridge construction, the prefabrication and assembly construction process of the bridges cancels the cast-in-place of support concrete, shortens the construction period, greatly reduces the occupied area width required by construction, greatly reduces the influence on the existing traffic, and brings positive improvement on the field quality, safety, civilized construction and social influence.
The prefabricated small box girder is a bridge superstructure which is most widely applied, in the process of on-site small box girder installation, the small box girder is generally hoisted and fixed through a temporary support, after a plurality of small box girders are connected into a whole through a cast-in-place end cross beam, the temporary support is relieved through the stress of a permanent support below the end cross beam, and the small box girder reaches the bridge forming working condition after the stress conversion. However, the small box girder has heavy weight, so that the requirement on the bearing capacity of the temporary support is high, and the temporary support is difficult to remove in a stressed and compacted state.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method of a sliding unlocking type temporary support for mounting a prefabricated small box girder.
The invention provides a construction method of a sliding unlocking type temporary support for mounting a prefabricated small box girder, which comprises the following steps:
installing a temporary support, namely reversely stacking a first support body of the temporary support on a second support body, namely arranging a first support surface of the first support body upwards, placing a first inclined surface of the first support body on a second inclined surface of the second support body, and then connecting the first inclined surface and the second inclined surface through a connecting part to fix the first support body and the second support body into a whole;
placing the installed temporary supports on the pier top capping beam, arranging two temporary supports at the end part of each prefabricated small box girder, and placing the two temporary supports on the pier top capping beam at intervals;
hoisting the prefabricated small box girder, hoisting the prefabricated small box girder to a temporary support, wherein the temporary support placement point is positioned below a prefabricated small box girder web plate, then constructing a cast-in-place end beam of the prefabricated small box girder in the state, and a permanent support is positioned below the end beam;
unlocking the temporary support, after the construction and maintenance of the cast-in-place end beam are completed, the prefabricated small box beam can be borne by the permanent support, then unlocking the temporary support, firstly dismantling the connecting part of the temporary support, then applying thrust to one end of a first frame body of the temporary support to enable the first frame body to slide and dislocate relative to a second frame body, and enabling the height of the first frame body to be reduced after sliding so as to be separated from the prefabricated small box beam, so that the stress of the prefabricated small box beam is converted into the stress of the permanent support;
after the temporary support is slid and unlocked, the temporary support is withdrawn, and the installation construction of the next span of the prefabricated small box girder is carried out.
Preferably, the step of placing the installed temporary support on the pier capping beam comprises: the placement position of the temporary support on the pier coping beam is determined by accurate measurement lofting.
Preferably, the unlocking of the temporary support comprises pushing one end of the first frame body of the temporary support. And knocking one end of the first frame body of the temporary support by using a hammer.
Preferably, before the step of installing the temporary support, the method further comprises the steps of prefabricating a first support body and a second support body: first support body, the structure of second support body is the same, first support body, the second support body all includes first steel sheet, second steel sheet and web, with the vertical setting in first steel sheet of web, between the second steel sheet, first steel sheet is the first holding surface of first support body, the second holding surface of second support body, the lower surface of prefabricated little case roof beam is supported to first holding surface, the second holding surface supports in the upper surface of mound top capping beam, the second steel sheet is the first inclined plane of first support body, the second inclined plane of second support body, make the upper end of web and the lower surface welding of first steel sheet, the lower extreme of web and the upper surface welded connection of second steel sheet.
Preferably, the slopes of the first supporting surface and the second supporting surface are designed according to the slope of the cross slope of the prefabricated small box girder, so that the slopes of the first supporting surface and the second supporting surface are matched with the slope of the cross slope of the prefabricated small box girder.
Preferably, the slope of the first slope and the slope of the second slope are 8-12%.
Preferably, the first support body and the second support further comprise stiffening rib plates, the stiffening rib plates are vertically welded on two sides of the web plate, the upper ends of the stiffening rib plates are welded with the bottom surface of the first steel plate, the side surfaces of the stiffening rib plates are welded with the web plate, and the lower ends of the stiffening rib plates are welded with the upper surface of the second steel plate.
Preferably, the first inclined surface and the second inclined surface are both provided with bolt holes for penetrating through the connecting part, and the bolt holes penetrate through the thickness direction of the first inclined surface and the second inclined surface.
Compared with the prior art, the invention has at least one of the following beneficial effects:
according to the construction method, the temporary support is structurally characterized in that two split type support bodies are vertically stacked and assembled into a whole, the contact surfaces of the two split type support bodies are arranged to be inclined surfaces, the two inclined surfaces are locked by the connecting parts, and a certain force is applied to enable the upper support body and the lower support body to slide relatively when the temporary support is detached, so that the inclined sliding unlocking between the upper support body and the lower support body is realized.
Furthermore, from the perspective of the material and the dismounting method of the temporary support, the first support body and the second support body of the temporary support are made of steel materials to form a steel structure, the steel structure is strong in pressure resistance, convenient and quick to manufacture, and the bearing capacity requirement of the temporary pivot of the prefabricated small box girder is effectively met.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of the construction steps of a sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 2 is a schematic diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 3 is a schematic diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 4 is a schematic diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 5 is a schematic diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 6 is a schematic construction diagram of a temporary support of the slide unlocking type according to a preferred embodiment of the present invention;
FIG. 7 is a schematic construction diagram of a temporary support of the slide unlocking type according to a preferred embodiment of the present invention;
FIG. 8 is a cross-sectional view of 1-1 of FIG. 6;
FIG. 9 is a cross-sectional view of 2-2 of FIG. 6;
the scores in the figure are indicated as: the scores in the figure are indicated as: 1 is first support body, 2 is the second support body, 3 is adapting unit, 4 is first holding surface, 5 is first inclined plane, 6 is the web, 7 is the stiffening rib board, 8 is the bolt hole, 9 is interim support, 10 is the pier crown capping beam, 11 is the prefabricated little case roof beam.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Referring to fig. 1 to 5, there are shown schematic diagrams of the construction steps of the sliding unlocking type temporary support for mounting the prefabricated box girder according to a preferred embodiment of the present invention, and the construction steps are as follows:
mounting the temporary support 9: referring to fig. 6, the first frame body 1 of the temporary support 9 is reversely stacked on the second frame body 2, that is, the first support surface 4 of the first frame body 1 is arranged upward, the first inclined surface 5 of the first frame body 1 is placed on the second inclined surface of the second frame body 2, and then the first inclined surface 5 and the second inclined surface are connected through the connecting component 3, so that the first frame body 1 and the second frame body 2 are fixed as a whole.
With reference to fig. 1, the temporary support 9 is placed: and placing the installed temporary supports 9 on the pier top cover beam 10, arranging two temporary supports 9 at the end part of each prefabricated small box beam 11, and placing the two temporary supports 9 on the pier top cover beam 10 at intervals.
Referring to fig. 2, hoisting the prefabricated box girder 11: hoisting the prefabricated small box girder 11 to the temporary support 9 by using a crane, releasing the hook of the crane after the prefabricated small box girder is placed in place, placing the temporary support 9 below the web 6 of the prefabricated small box girder 11, then constructing the cast-in-place end beam of the prefabricated small box girder 11 in the state, and placing the permanent support below the end beam.
With reference to fig. 3 and 4, the temporary support 9 is unlocked: after the construction and maintenance of the cast-in-place end beam are completed, the prefabricated small box beam 11 can be borne by the permanent support, the temporary support 9 is unlocked, the connecting part 3 of the temporary support 9 is firstly detached, then thrust is applied to one end of the first support body 1 of the temporary support 9, the first support body 1 is enabled to slide and dislocate relative to the second support body 2, and due to the fact that the slope is formed between the first inclined surface 5 and the second inclined surface, the height of the first support body 1 is lowered after sliding to separate from the prefabricated small box beam 11, and the stress of the prefabricated small box beam 11 is converted into the stress of the permanent support.
Referring to fig. 5, after the temporary support 9 is slid and unlocked, the temporary support 9 is removed, and the installation construction of the next span of the prefabricated box girder 11 is performed.
In other preferred embodiments, the construction method of the sliding unlocking type temporary support 9 for the installation of the prefabricated small box girder 11 comprises the following steps of: the placement of the temporary support 9 on the pier capping beam 10 is first determined by accurate measurement lofting.
In other partially preferred embodiments, the construction method for the sliding unlocking type temporary support 9 for the installation of the prefabricated box girder 11, in the step of unlocking the temporary support 9, the step of applying a pushing force to one end of the first frame body 1 of the temporary support 9 includes striking one end of the first frame body 1 of the temporary support 9 with a hammer, that is, applying a pushing force to one end of the first frame body 1 with a hammer, so that the first frame body 1 can be slid toward the other end.
In other partially preferred embodiments, the step of mounting the temporary support 9 comprises prefabricating the temporary support 9 in the factory. The sliding unlocking type temporary support 9 can adopt the following structure:
referring to fig. 6-9, the temporary support is shown in a schematic structural view of a sliding unlocking type, which includes a first support body 1 and a second support body 2, wherein the first support body 1 and the second support body 2 are oppositely stacked up and down and are connected and locked through a connecting part 3. When dismantling the construction of temporary support 9, slide the unblock through the slant with first support body 1, second support body 2, solved prefabricated little case roof beam 11 installation back temporary support 9 and demolish the problem of difficulty.
Referring to fig. 6, the first frame body 1 is provided with a first supporting surface 4 and a first inclined surface 5, the first supporting surface 4 is used for supporting a beam body, and the supporting surface is in contact with the bottom surface of the beam body; the first inclined plane 5 is used for sliding and connecting and is a sliding contact surface of the first frame body 1 and the second frame body 2. The second frame body 2 has the same structure as the first frame body 1 and comprises a second supporting surface and a second inclined surface. First support body 1 sets up in the top of second support body 2, during the concrete implementation, stack first support body 1 in the top of second support body 2, and first support body 1 and second support body 2 are reverse to be placed, be about to first inclined plane 5 of first support body 1 sets up on the second inclined plane of second support, the second holding surface of second support body 2 supports in the top of mound top bent cap 10 to it is fixed with first inclined plane 5 and second inclined plane through adapting unit 3, lock first inclined plane 5 and second inclined plane promptly, make first support body 1 and second support body 2 form one whole. The connecting member 3 may employ a connecting bolt. The connecting bolt can adopt 8.8-grade M30 multiplied by 60mm bolt and is matched with 8.8-grade M30 nut. When the temporary support 9 is dismounted, the connecting part 3 is firstly dismounted, and then the first inclined surface 5 and the second inclined surface can slide relatively by applying force to realize inclined sliding unlocking.
The further setting of the temporary support 9 of the unlocking type that slides adopts steel to make the first support body 1, the second support body 2 of the temporary support 9 to form a steel structure, and the material compressive capacity of steel structure is strong, the preparation is convenient quick to can effectively satisfy the bearing capacity requirement of the 11 temporary fulcrums of prefabricated little case roof beam. Referring to fig. 6 and 7, the first frame body 1 and the second frame body all comprise a first steel plate, a second steel plate and a web 6, wherein the first steel plate is arranged above the second steel plate, the web 6 is vertically arranged between the first steel plate and the second steel plate, the upper end of the web 6 is connected with the first steel plate, and the lower end of the web 6 is connected with the second steel plate. The first steel plate is a first supporting surface 4 of the first frame body 1 and a second supporting surface of the second frame body 2, the first supporting surface 4 supports the lower surface of the prefabricated small box girder 11, the second supporting surface supports the upper surface of the pier top cover girder 10, and the second steel plate is a first inclined surface 5 of the first frame body 1 and a second inclined surface of the second frame body 2. As a preferred embodiment, the first frame body 1 and the second frame body include stiffening rib plates 7, the stiffening rib plates 7 are vertically disposed on two sides of the web 6, the upper ends of the stiffening rib plates 7 are welded to the bottom surface of the first steel plate, the side surfaces of the stiffening rib plates 7 are welded to the web 6, and the lower ends of the stiffening rib plates 7 are welded to the upper surface of the second steel plate. More preferred mode, first support body 1, second support body 2 are equipped with 4 stiffening rib boards 7, and 4 stiffening rib boards 7 separate the interval respectively and set up the both sides at web 6 to further consolidate above-mentioned structure, make the overall structure of first support body 1, second support body 2 stable.
In specific implementation, the first steel plate, the second steel plate, the web 6 and the stiffening rib plates 7 can be made of Q235 steel. The first steel plate and the second steel plate can be both made of steel plates with the wall thickness of 12 mm. The web 6 and the stiffening rib plates 7 can be made of steel plates with the wall thickness of 16 mm. In a particular embodiment, the temporary support 9 may adopt the following dimensional parameters: the total height H of the temporary support is the net distance between the designed prefabricated small box girder 11 and the bent cap; the first inclined plane 5, the second inclined plane, the first supporting plane 4 and the second supporting plane are all inclined to the horizontal plane, so that the heights of the two ends of the first frame body 1 and the second frame body 2 are different, and the height H1 of the high end part of the first frame body 1 and the second frame body 2 is 1/2H +1/2L multiplied by 10%; the height H2 of the lower ends of the first frame body 1 and the second frame body 2 is 1/2H-1/2 Lx 10%; the total length L of the support is H + 1/2H; the distance between the stiffening rib plates 7 is generally 0.4L, and the distance between the stiffening rib plates and the end part of the support is generally 0.3L; the short side distance L between the connecting bolt hole 8 and the steel plate of the sliding contact surface is 0.15L; the total thickness T of the support is H; the distance T1 between the connecting bolt hole 8 and the long side of the sliding contact surface steel plate is 0.25T.
Referring to fig. 8 and 9, the first inclined surface 5 and the second inclined surface are each provided with a bolt hole 8 for passing through the connecting member 3, and the bolt hole 8 penetrates in the thickness direction of the first inclined surface 5 and the second inclined surface. Four bolts are respectively threaded from the bolt holes 8 of the first inclined surface 5 to the bolt holes 8 of the second inclined surface and then nuts are connected. The first inclined plane 5 and the second inclined plane are locked through four bolts, the first inclined plane 5 and the second inclined plane do not displace, and the first frame body 1 and the second frame body 2 are connected into a whole. In an embodiment, the first inclined plane 5 and the second inclined plane are respectively provided with 4 bolt holes 8 which are uniformly distributed, and the hole diameters and positions of the bolt holes 8 of the first inclined plane 5 and the second inclined plane are matched. And the aperture of the bolt hole 8 matches the size of the connecting part 3 (bolt). The size parameter of the bolt hole 8 can adopt the diameter of 32 mm.
Preferably, the slope of the first slope 5 and the slope of the second slope are 8 to 12%. Tests show that when the slope is 10%, the stability, namely the slippage effect, is optimal. The first supporting surface 4 and the second supporting surface are obliquely arranged with the horizontal plane, and the slope of the first supporting surface 4 and the slope of the second supporting surface are matched with the slope of the designed cross slope of the prefabricated small box girder 11.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (8)
1. A construction method of a sliding unlocking type temporary support for mounting a prefabricated small box girder is characterized by comprising the following steps:
installing a temporary support, namely reversely stacking a first support body of the temporary support on a second support body, namely arranging a first support surface of the first support body upwards, placing a first inclined surface of the first support body on a second inclined surface of the second support body, and then connecting the first inclined surface and the second inclined surface through a connecting part to fix the first support body and the second support body into a whole;
placing the installed temporary supports on the pier top capping beam, arranging two temporary supports at the end part of each prefabricated small box girder, and placing the two temporary supports on the pier top capping beam at intervals;
hoisting the prefabricated small box girder, hoisting the prefabricated small box girder to a temporary support, wherein the temporary support placement point is positioned below a prefabricated small box girder web plate, then performing construction of cast-in-place end beams of the prefabricated small box girder, and a permanent support is positioned below the end beams;
unlocking the temporary support, after the construction and maintenance of the cast-in-place end beam are completed, the prefabricated small box beam can be borne by the permanent support, then unlocking the temporary support, firstly dismantling the connecting part of the temporary support, then applying thrust to one end of a first frame body of the temporary support to enable the first frame body to slide and dislocate relative to a second frame body, and enabling the height of the first frame body to be reduced after sliding so as to be separated from the prefabricated small box beam, so that the stress of the prefabricated small box beam is converted into the stress of the permanent support;
after the temporary support is slid and unlocked, the temporary support is withdrawn, and the installation construction of the next span of the prefabricated small box girder is carried out.
2. The construction method of the sliding unlocking type temporary support for the prefabricated small box girder installation according to the claim 1, wherein the step of placing the installed temporary support on the pier top cover beam comprises the following steps: the placement position of the temporary support on the pier coping beam is determined by accurate measurement lofting.
3. The construction method of the sliding unlocking type temporary support for the prefabricated small box girder installation according to the claim 1, wherein the unlocking of the temporary support for applying the pushing force to the end of the first frame body of the temporary support comprises: and knocking one end of the first frame body of the temporary support by using a hammer.
4. The construction method of the sliding unlocking type temporary support for the prefabricated small box girder installation according to the claim 1, characterized in that before the step of installing the temporary support, the method further comprises the steps of prefabricating a first support body and a second support body: first support body, the structure of second support body is the same, first support body, the second support body all includes first steel sheet, second steel sheet and web, with the vertical setting in first steel sheet of web, between the second steel sheet, first steel sheet is the first holding surface of first support body, the second holding surface of second support body, the lower surface of prefabricated little case roof beam is supported to first holding surface, the second holding surface supports in the upper surface of mound top capping beam, the second steel sheet is the first inclined plane of first support body, the second inclined plane of second support body, make the upper end of web and the lower surface welding of first steel sheet, the lower extreme of web and the upper surface welded connection of second steel sheet.
5. The construction method of the sliding unlocking type temporary support for the installation of the prefabricated small box girder as claimed in claim 4, wherein the slopes of the first supporting surface and the second supporting surface are designed according to the slope of the cross slope of the prefabricated small box girder, so that the slopes of the first supporting surface and the second supporting surface are matched with the slope of the cross slope of the prefabricated small box girder.
6. The construction method of the sliding unlocking type temporary support for the prefabricated small box girder installation according to claim 4, wherein the slope of the first inclined surface and the slope of the second inclined surface are 8-12%.
7. The construction method of the sliding unlocking type temporary support for the installation of the precast box girder as claimed in claim 4, wherein the first frame body and the second frame further comprise stiffening rib plates, the stiffening rib plates are vertically welded on both sides of the web, the upper ends of the stiffening rib plates are welded with the bottom surface of the first steel plate, the side surfaces of the stiffening rib plates are welded with the web, and the lower ends of the stiffening rib plates are welded with the upper surface of the second steel plate.
8. The temporary support of sliding unlocking type for mounting prefabricated box girder according to claim 4, wherein bolt holes for passing through the connecting parts are opened on the first inclined surface and the second inclined surface, and the bolt holes penetrate through the thickness direction of the first inclined surface and the second inclined surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428467.1A CN111549675A (en) | 2020-05-20 | 2020-05-20 | Construction method of sliding unlocking type temporary support for mounting prefabricated small box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428467.1A CN111549675A (en) | 2020-05-20 | 2020-05-20 | Construction method of sliding unlocking type temporary support for mounting prefabricated small box girder |
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| CN111549675A true CN111549675A (en) | 2020-08-18 |
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| CN202010428467.1A Pending CN111549675A (en) | 2020-05-20 | 2020-05-20 | Construction method of sliding unlocking type temporary support for mounting prefabricated small box girder |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817325A (en) * | 2012-09-13 | 2012-12-12 | 永升建设集团有限公司 | Construction method of simply supported-continuous switching system of negative moment beam prestressed precast box beam |
| JP2016079564A (en) * | 2014-10-10 | 2016-05-16 | 株式会社三沢工務店 | Support jig of support pipe for concrete mold |
| CN206784186U (en) * | 2017-05-26 | 2017-12-22 | 中国十九冶集团有限公司 | Bent cap beam support |
| CN207245245U (en) * | 2017-09-09 | 2018-04-17 | 上海先达特种土木工程有限公司 | Wedge-shaped temporary support |
| CN209128893U (en) * | 2018-11-02 | 2019-07-19 | 浙江中南建设集团钢结构有限公司 | Temporary support is used in a kind of unloading |
-
2020
- 2020-05-20 CN CN202010428467.1A patent/CN111549675A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817325A (en) * | 2012-09-13 | 2012-12-12 | 永升建设集团有限公司 | Construction method of simply supported-continuous switching system of negative moment beam prestressed precast box beam |
| JP2016079564A (en) * | 2014-10-10 | 2016-05-16 | 株式会社三沢工務店 | Support jig of support pipe for concrete mold |
| CN206784186U (en) * | 2017-05-26 | 2017-12-22 | 中国十九冶集团有限公司 | Bent cap beam support |
| CN207245245U (en) * | 2017-09-09 | 2018-04-17 | 上海先达特种土木工程有限公司 | Wedge-shaped temporary support |
| CN209128893U (en) * | 2018-11-02 | 2019-07-19 | 浙江中南建设集团钢结构有限公司 | Temporary support is used in a kind of unloading |
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Application publication date: 20200818 |