CN111549674A - A unblock formula temporary support that slides for installation of prefabricated small box girder - Google Patents
A unblock formula temporary support that slides for installation of prefabricated small box girder Download PDFInfo
- Publication number
- CN111549674A CN111549674A CN202010428324.0A CN202010428324A CN111549674A CN 111549674 A CN111549674 A CN 111549674A CN 202010428324 A CN202010428324 A CN 202010428324A CN 111549674 A CN111549674 A CN 111549674A
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- support
- steel plate
- temporary support
- frame body
- support body
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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
-
- 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
- E01D19/04—Bearings; Hinges
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a sliding unlocking type temporary support for mounting a prefabricated small box girder, which comprises: the first support body is provided with a first supporting surface and a first inclined surface, the first supporting surface is used for supporting the beam body, and the first inclined surface is used for sliding and connecting; the second frame body has the same structure as the first frame body and comprises a second supporting surface and a second inclined surface; the first frame body is arranged above the second frame body, the first inclined surface of the first frame body is arranged on the second inclined surface of the second support, relative sliding between the first inclined surface and the second inclined surface can be achieved by applying force, and the first inclined surface and the second inclined surface are fixed through the connecting component, so that the first frame body and the second frame body form a whole. According to the invention, two split type frame bodies are stacked up and down to be assembled into a whole, so that the contact inclined planes between the two frame bodies slide relatively, and the first frame body and the second frame body are unlocked, and the problem that the temporary support is difficult to disassemble after the prefabricated small box girder is installed is effectively solved.
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 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 mounting the prefabricated small box girder on site, the hoisted prefabricated small box girder is supported and fixed by a temporary support, after a plurality of small box girders are connected into a whole by a cast-in-place end beam, the temporary support is relieved through the stress of a permanent support below the end beam, and the small box girder reaches the working condition of forming a bridge 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 sliding unlocking type temporary support for mounting a prefabricated small box girder.
The invention provides a sliding unlocking type temporary support for mounting a prefabricated small box girder, which comprises:
the first support body is provided with a first support surface and a first inclined surface, the first support surface is used for supporting the beam body, and the first inclined surface is used for sliding and connecting;
the second frame body has the same structure as the first frame body and comprises a second supporting surface and a second inclined surface;
the first support body is arranged above the second support body, the first inclined plane of the first support body is arranged on the second inclined plane of the second support body, relative sliding can be achieved between the first inclined plane and the second inclined plane by applying force, and the first inclined plane and the second inclined plane are fixed through a connecting part, so that the first support body and the second support body are integrated into a whole.
Preferably, first support body the second support includes first steel sheet, second steel sheet and web, wherein, first steel sheet set up in the top of second steel sheet, the web vertically set up in first steel sheet between the second steel sheet, the upper end of web with first steel sheet is connected, the lower extreme of web with the second steel sheet is connected.
Preferably, first support body the second support still includes the stiffening rib board, the stiffening rib board set up perpendicularly in the both sides of web, the upper end of stiffening rib board with the bottom surface of first steel sheet is connected, the side of stiffening rib board with the web is connected, the lower extreme of stiffening rib board with the higher authority of second steel sheet is connected.
Preferably, the number of the stiffening ribs is 4.
Preferably, the first inclined plane and the second inclined plane are provided with bolt holes for penetrating through the connecting part, and the bolt holes penetrate through the thickness direction of the first inclined plane and the second inclined plane.
Preferably, the slope of the first slope and the slope of the second slope are 8-12%.
Preferably, the slope of the first supporting surface and the slope of the second supporting surface are matched with the slope of the designed transverse slope of the prefabricated small box girder.
Preferably, the connecting member is a bolt.
Compared with the prior art, the invention has at least one of the following beneficial effects:
according to the sliding unlocking type temporary support, the two split type support bodies are stacked up and down to be assembled into a whole, the contact surfaces of the two split type support bodies are set to be inclined surfaces, the two inclined surfaces are locked by the connecting parts, and when the temporary support is disassembled, a certain force is applied to enable the upper support body and the lower support body to slide relatively, so that the inclined sliding unlocking between the upper support body and the lower support body is realized, the temporary support is easier to disassemble, and the problem that the temporary support is difficult to disassemble after a prefabricated small box girder is installed is effectively solved.
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 construction view of a slide unlocking type temporary support according to a preferred embodiment of the present invention;
FIG. 2 is a schematic construction diagram of a temporary support of a slide unlocking type according to a preferred embodiment of the present invention;
FIG. 3 is a cross-sectional view of 1-1 of FIG. 1;
FIG. 4 is a cross-sectional view of 2-2 of FIG. 1;
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 diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 7 is a schematic diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 8 is a schematic diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
FIG. 9 is a schematic diagram of the construction steps of the sliding unlocking type temporary support according to a preferred embodiment of the invention;
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, which is a schematic structural view of a slide unlocking type temporary support according to a preferred embodiment of the present invention, the temporary support includes a first support 1 and a second support 2 having the same structure, the first support 1 is stacked on the second support 2, and the first support 1 and the second support 2 are placed in opposite directions and are connected and locked by a connecting member 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.
The first support 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. The first support body 1 is arranged above the second support body 2, when the concrete implementation is carried out, the first support body 1 is stacked above the second support body 2, the first support body 1 and the second support body 2 are placed in a reverse direction, namely, the first supporting surface 5 of the first support body 1 is contacted with the beam bottom of the prefabricated small box girder 11, the first inclined surface 5 of the first support body 1 is arranged on the second inclined surface of the second support, the second supporting surface of the second support body 2 is supported above the pier top cover girder 10, and the first inclined surface 5 and the second inclined surface are fixed through the connecting part 3, namely, the first inclined surface 5 and the second inclined surface are locked, so that the first support body 1 and the second support body 2 form a 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.
In other partial preferred embodiments, the first support body 1 and the second support body 2 of the temporary support 9 are made of steel to form a steel structure, the steel structure is strong in material pressure resistance and convenient and quick to manufacture, and the bearing capacity requirement of the temporary fulcrum of the prefabricated small box girder 11 can be effectively met. Referring to fig. 1 and 2, 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 connected with the bottom surface of the first steel plate, the side surfaces of the stiffening rib plates 7 are connected with the web 6, and the lower ends of the stiffening rib plates 7 are connected with the upper surface of the second steel plate. More preferably, first support body 1, second support can set up 4 stiffening rib plates 7, and 4 stiffening rib plates 7 interval respectively 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 12mm, and 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 9 is the net distance between the prefabricated small box girder 11 and the cover girder; the first inclined plane 5, the second inclined plane, the first supporting surface 4 and the second supporting surface 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. The height H1 of the high end parts of the first frame body 1 and the second frame body 2 is 1/2H +1/2 Lx 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.
In other preferred embodiments, as shown in fig. 3 and 4, the first and second slopes 5 and 4 are each provided with a bolt hole 8 for passing through the connecting member 3, and the bolt hole 8 penetrates through the thickness direction of the first and second slopes 5 and 4. 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.
In other partially preferred embodiments, the slope of the first slope 5 and the second slope is 8-12%. Tests show that when the slope is 10%, the stability and the slippage effect are optimal.
In other preferred embodiments, the first supporting surface 4 and the second supporting surface are arranged obliquely to the horizontal, and the slope of the first supporting surface 4 and the second supporting surface is matched with the designed cross slope of the prefabricated small box girder 11.
The sliding unlocking type temporary support can adopt the following construction method, as shown in fig. 5-9, and comprises the following specific steps:
the method comprises the following steps: with reference to fig. 5, the temporary support 9 is placed: firstly, the position of a temporary support 9 placed on the upper surface of a pier top capping beam 10 is determined through accurate measurement lofting, the temporary support 9 is placed on the pier top capping beam 10, two temporary supports 9 are placed at the end part of each prefabricated small box girder 11, and a first support body 1 and a second support body 2 of the temporary support 9 are connected into a whole through bolts in advance.
Step two: referring to fig. 6, hoisting the prefabricated box girder 11: hoisting the prefabricated small box girder 11 to the temporary support 9 by using a crane, releasing a hook of the crane after the prefabricated small box girder is placed in place, placing the temporary support 9 below a web plate 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.
Step three: referring to fig. 7, the bolts are removed: 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, and the connecting bolts of the first support body 1 and the second support body 2 of the temporary support 9 are firstly detached.
Step four: referring to fig. 8, the slide unlock: after the bolts are removed, a hammer is adopted to knock the first frame body 1 of the temporary support 9, the first frame body 1 and the second frame body 2 are slid and dislocated, the height of the first frame body 1 is reduced after sliding due to the fact that a sliding surface has a slope of 10%, the first frame body is separated from the prefabricated small box girder 11 above, and the stress is converted into the stress of the permanent support.
Step five: referring to fig. 9, evacuation temporary support 9: after the temporary support 9 is slid and unlocked, the temporary support 9 is removed, and then the installation construction of the next span of the prefabricated small box girder 11 can be carried out.
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 slip unblock formula temporary support for installation of prefabricated small box girder which characterized in that includes:
the first support body is provided with a first support surface and a first inclined surface, the first support surface is used for supporting the beam body, and the first inclined surface is used for sliding and connecting;
the second frame body has the same structure as the first frame body and comprises a second supporting surface and a second inclined surface;
the first support body is arranged above the second support body, the first inclined plane of the first support body is arranged on the second inclined plane of the second support body, relative sliding can be achieved between the first inclined plane and the second inclined plane by applying force, and the first inclined plane and the second inclined plane are fixed through a connecting part, so that the first support body and the second support body are integrated into a whole.
2. The temporary support for mounting of the precast box girder of claim 1, wherein the first support body and the second support comprise a first steel plate, a second steel plate and a web, wherein the first steel plate is arranged above the second steel plate, the web is vertically arranged between the first steel plate and the second steel plate, the upper end of the web is connected with the first steel plate, and the lower end of the web is connected with the second steel plate.
3. The temporary support of claim 2, wherein the first support body and the second support further comprise stiffening rib plates, the stiffening rib plates are vertically arranged on two sides of the web plate, the upper ends of the stiffening rib plates are connected with the bottom surface of the first steel plate, the side surfaces of the stiffening rib plates are connected with the web plate, and the lower ends of the stiffening rib plates are connected with the upper surface of the second steel plate.
4. The temporary support according to claim 3, characterized in that said stiffening ribs are 4 in number.
5. The temporary support for mounting precast small box girders according to claim 2, wherein the first and second inclined surfaces are each provided with a bolt hole for passing through a connecting member, and the bolt hole penetrates through the thickness direction of the first and second inclined surfaces.
6. The temporary support according to any of claims 1 to 5, characterized in that the slope of said first and second slopes is 8-12%.
7. The slip release temporary support for precast trabecular mounting as recited in any one of claims 1-5, wherein the slope of said first and second bearing surfaces matches the precast trabecular design cross slope.
8. A sliding unlocking temporary support for the installation of precast box girders according to any one of claims 1-5, characterized in that the connecting members are bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428324.0A CN111549674A (en) | 2020-05-20 | 2020-05-20 | A unblock formula temporary support that slides for installation of prefabricated small box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010428324.0A CN111549674A (en) | 2020-05-20 | 2020-05-20 | A unblock formula temporary support that slides for installation of prefabricated small box girder |
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| Publication Number | Publication Date |
|---|---|
| CN111549674A true CN111549674A (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010428324.0A Pending CN111549674A (en) | 2020-05-20 | 2020-05-20 | A unblock formula temporary support that slides for installation of prefabricated small box girder |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016216919A (en) * | 2015-05-15 | 2016-12-22 | 東日本旅客鉄道株式会社 | Bridge fall prevention structure |
| CN206173788U (en) * | 2016-09-26 | 2017-05-17 | 河南小榆树工程科技有限公司 | Adjustable base stone of intelligent monitoring for bridge |
| CN208362897U (en) * | 2018-05-18 | 2019-01-11 | 中铁三局集团广东建设工程有限公司 | One kind falling beam support system |
| 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 |
| CN209443383U (en) * | 2019-01-16 | 2019-09-27 | 贝正河北工程技术有限公司 | It is a kind of for substituting the supporting apparatus of bridge pad |
-
2020
- 2020-05-20 CN CN202010428324.0A patent/CN111549674A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016216919A (en) * | 2015-05-15 | 2016-12-22 | 東日本旅客鉄道株式会社 | Bridge fall prevention structure |
| CN206173788U (en) * | 2016-09-26 | 2017-05-17 | 河南小榆树工程科技有限公司 | Adjustable base stone of intelligent monitoring for bridge |
| CN208362897U (en) * | 2018-05-18 | 2019-01-11 | 中铁三局集团广东建设工程有限公司 | One kind falling beam support system |
| 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 |
| CN209443383U (en) * | 2019-01-16 | 2019-09-27 | 贝正河北工程技术有限公司 | It is a kind of for substituting the supporting apparatus of bridge pad |
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