CN111188278B - A method for on-site assembly of steel-concrete composite beams - Google Patents
A method for on-site assembly of steel-concrete composite beams Download PDFInfo
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- CN111188278B CN111188278B CN202010100803.XA CN202010100803A CN111188278B CN 111188278 B CN111188278 B CN 111188278B CN 202010100803 A CN202010100803 A CN 202010100803A CN 111188278 B CN111188278 B CN 111188278B
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- 239000002131 composite material Substances 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 177
- 239000010959 steel Substances 0.000 claims abstract description 177
- 238000010276 construction Methods 0.000 claims abstract description 32
- 238000009415 formwork Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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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
本申请公开了一种胎架结构、胎架组件及施工方法，该胎架结构，包括：用于支撑钢箱梁的架体，以使多个钢箱梁在距离地面100cm以下位置进行拼装，架体下端用于与固定面固定连接。本申请解决相关技术中钢箱梁因高空拼装而导致的拼装精度低，施工安全风险大，施工效率低的问题。
The present application discloses a tire frame structure, a tire frame assembly and a construction method. The tire frame structure comprises: a frame body for supporting a steel box beam, so that a plurality of steel box beams can be assembled at a position below 100 cm from the ground, and the lower end of the frame body is used for fixed connection with a fixed surface. The present application solves the problems of low assembly precision, high construction safety risk and low construction efficiency caused by high-altitude assembly of steel box beams in the related art.
Description
Technical Field
The application relates to the field of steel box girder jig frames, in particular to a jig frame structure, a jig frame assembly and a construction method.
Background
The steel beam part of the steel-concrete composite beam is a steel box with a straight web opening, the steel box is connected into a three-box structure through inter-box coupling beams, and shear nails are arranged at the top of the steel-concrete composite beam and are effectively connected with bridge decks. The installation mode mainly adopts a construction method of erecting a temporary buttress, hoisting on the flat ground and integrally casting a concrete bridge deck, because the steel-concrete composite beam is erected in the high air, when the high-altitude steel box beam is assembled, the assembly precision is difficult to control, the construction safety risk is high, and a plurality of brackets are required to be erected when the high-altitude assembly is carried out, so that the bracket material investment is large, and the construction efficiency is low.
Aiming at the problems of low assembly precision, high construction safety risk and low construction efficiency caused by high-altitude assembly of a steel box girder in the related technology, no effective solution is proposed at present.
Disclosure of Invention
The application mainly aims to provide a jig frame structure, a jig frame assembly and a construction method, which are used for solving the problems of low assembly precision, high construction safety risk and low construction efficiency caused by high-altitude assembly of a steel box girder in the related technology.
In order to achieve the above object, the present application provides a jig frame structure comprising: the frame body is used for supporting the steel box girders so that the plurality of steel box girders are assembled at the position below 100cm away from the ground, and the lower end of the frame body is fixedly connected with the fixing surface.
Further, the upper end of the frame body is provided with a buffer piece which is used for being in direct contact with the steel box girder; the support body is including the backup pad first, stand, backup pad second and the load bearing member that set gradually, backup pad first is used for dismantling fixed connection with the stationary plane, the bolster is located load bearing member upper end.
Further, the first supporting plate is a steel plate flange, and the steel plate flange is fixedly connected with the fixing surface through anchor bolts; the upright post is a steel pipe, and the upper end and the lower end of the steel pipe are fixedly connected with the first support plate and the second support plate respectively; the second supporting plate is a round steel plate welded with the upper end of the steel pipe; wherein the steel pipe is arranged coaxially with the first supporting plate and the second supporting plate.
Further, the bearing piece comprises I-steel arranged on the upper end face of the second supporting plate and an adjusting steel plate arranged on the upper end face of the I-steel, the I-steel is located in the middle of the second supporting plate, and the buffer piece is arranged on the upper end face of the adjusting steel plate.
The jig frame assembly comprises at least two jig frame structures, wherein the at least two jig frame structures are fixedly connected through connecting pieces; the connecting piece is arranged to be an I-steel cross joint, and two ends of the I-steel cross joint are fixedly connected with adjacent frame bodies respectively.
The on-site assembly construction method of the steel-concrete composite beam is characterized by comprising the following steps of:
Presetting a fixing surface, installing a frame body on the fixing surface, hoisting the steel box girders to be assembled on the frame body, enabling the height of the steel box girders to be 100cm below the ground, assembling a plurality of steel box girders on the frame body, and hoisting the assembled steel box girders to a girder frame; wherein,
(1) The method comprises the steps of presetting a fixing surface, installing and positioning an embedded part on the ground, and pouring a concrete ground by a formwork;
(2) The mounting frame body is a vertical column with strength meeting the bearing requirement, and a first supporting plate and a second supporting plate are welded at two ends of the vertical column respectively;
fixing one end of the upright post welded with the first supporting plate with the embedded part, fixing the bearing part on the second supporting plate, and adjusting the height difference between the jig frames by selecting bearing parts with different sizes, wherein the height of the assembled jig frames is not more than 100cm;
mounting an adjusting steel plate on the bearing piece, and adjusting the pre-camber and the longitudinal curve among the steel-concrete composite beams by selecting steel plates with different thicknesses;
(3) Hoisting the steel box girders, namely hoisting the steel box girders to be assembled onto the bearing parts of the jig frame by a crane and adjusting the interval between adjacent steel box girders;
(4) The top of the steel box girder is connected with the bridge deck plate through shear nails, the adjacent bridge deck plate forms an integral bridge deck through a longitudinal wet joint, and the adjacent steel box girder is bolted through a cross beam;
(5) And integrally hoisting the spliced steel-concrete composite beam to a beam frame.
Further, the specific mode of the step (1) is as follows: and blanking according to the design size of the foundation bolt, bending and forming, threading the end head, adopting a steel plate for the embedded part, punching 4 holes in the corresponding position on the steel plate by using a punching machine, installing the foundation bolt and the nut to form a combined embedded part, and pouring the concrete ground by using the formwork after the embedded part is installed and positioned.
Further, in the step (2), the vertical column adopts a steel pipe with phi 426x8, the material is Q235B, the first supporting plate adopts a steel plate flange with 50x50x2cm, the second supporting plate adopts a steel plate with phi 50x2cm, and the first supporting plate is fixed with the embedded part through foundation bolts.
Further, the step (2) further comprises uniformly welding stiffening ribs along the periphery of the steel pipe, wherein the stiffening ribs are welded with the adjacent first supporting plate and the adjacent second supporting plate.
Further, step (2) further comprises that each steel box girder corresponds to at least two moulding bed, adjacent moulding bed is connected through transverse connection, the bearing piece adopts I-steel, and the height difference of each I-steel is arranged according to the design pre-camber of the steel-concrete composite girder.
In the embodiment of the application, the frame body for the low-altitude assembly of the steel box girders is installed on the ground, the frame body for supporting the steel box girders is fixed on the fixing surface, and a plurality of steel box girders can be assembled at a position which is 100cm away from the ground, so that the aim of assembling the steel box girders at a position which is lower away from the ground is fulfilled, the splicing precision of the steel box girders is improved, the construction safety risk is reduced, the bracket investment is reduced, the technical effects of improving the construction efficiency are achieved, and the problems of low splicing precision, high construction safety risk and low construction efficiency caused by high-altitude assembly of the steel box girders in the related art are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:
FIG. 1 is a schematic diagram of a structure according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;
FIG. 3 is a schematic view of a frame according to an embodiment of the present application;
The steel box girder comprises a fixing surface 1, foundation bolts 2, a frame body 3, a buffer part 31, a bearing part 32, a supporting plate two, a column 34, a stiffening rib 35, a supporting plate one, a connecting part 4 and a steel box girder 5.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein.
In the present application, the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", and the like are based on the azimuth or positional relationship shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "disposed," "configured," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 3, an embodiment of the present application provides a tire frame structure, including: the frame body 3 is used for supporting the steel box girders 5, so that a plurality of steel box girders 5 are assembled at a position below 100cm away from the ground, and the lower end of the frame body 3 is fixedly connected with the fixing surface 1.
In this embodiment, support steel box girder 5 through support body 3, make steel box girder 5 assemble the construction in the position 100cm from ground, including bridge deck plate is fixed and wet seam construction etc., steel box girder 5 is by the height control of support body 3, preferably 40-80cm or 60cm, be convenient for construct, reduce the construction risk, because the construction of support has been reduced, make the efficiency of construction obtain effectively improving, and save support material, construction cost is reduced, support body 3 lower extreme is fixed with stationary plane 1, stationary plane 1 can be the higher ground of hardness or concrete ground after pouring, preferably the concrete ground that hardness up to standard after pouring, avoid support body 3 to sink.
As shown in fig. 1 to 3, the upper end of the frame body 3 is provided with a buffer member 31, the buffer member 31 is used for directly contacting with the steel box girder 5, the frame body 3 comprises a first support plate 36, a stand column 34, a second support plate 33 and a bearing member 32 which are sequentially arranged, the first support plate 36 is used for being detachably and fixedly connected with the fixing surface 1, and the buffer member 31 is arranged at the upper end of the bearing member 32; the cushioning member 31 is a rubber pad.
Specifically, it should be noted that, the frame body 3 is formed by the first supporting plate 36 and the upright post 34 arranged on the first supporting plate 36, the second supporting plate 33 arranged on the upright post 34 and the bearing member 32 arranged on the second supporting plate 33 together, the first supporting plate 36 is connected with the fixing surface 1, the fixing surface 1 can be concrete hardened ground, thereby providing good supporting capability, the first supporting plate 36 and the fixing surface 1 are detachably connected, the whole frame body 3 is convenient to mount and dismount, the frame body 3 can be reused, the upright post 34 is arranged on the first supporting plate 36 and can be welded with the first supporting plate 36, the upright post 34 is welded with the second supporting plate 33, the buffer member 31 at the upper end of the bearing member 32 is in direct contact with the lower end of the steel box girder 5, the impact force caused by the steel box girder 5 during mounting is buffered by the buffer member 31, the whole structure is ensured, the buffer member 31 can be provided as a rubber pad, the acquisition is easy, the buffer effect is good, the bearing member 32 is used for distributing the gravity of the steel box girder 5 onto the upright post 34, and the bearing member 32 can adopt a structure with stronger supporting capability.
As shown in fig. 1 to 3, the first support plate 36 is a steel plate flange, and the steel plate flange is fixedly connected with the fixing surface 1 through the anchor bolts 2; the upright post 34 is a steel pipe, and the upper end and the lower end of the steel pipe are fixedly connected with the first support plate 36 and the second support plate 33 respectively; the second supporting plate 33 is a round steel plate welded with the upper end of the steel pipe; wherein the steel pipe is arranged coaxially with the first support plate 36 and the second support plate 33.
Specifically, it should be noted that, the first support plate 36 adopts a steel plate flange, the fixing surface 1 adopts a concrete hardening ground, and an embedded steel plate matched with the steel plate flange can be embedded in the fixing surface 1, the steel plate flange and the embedded steel plate are in flange connection through the anchor bolt 2, the connection strength is further improved, the upright post 34 adopts a steel pipe, and the size of the steel pipe is set asThe steel tube is made of Q235B, so [ sigma ] =170 MPa and [ tau ] =117 MPa;
Calculating to obtain the sectional area A= 105.055cm 2＝0.0105055m2 of the steel pipe;
radius of gyration of steel pipe: i= 14.781cm;
The steel beam supporting height H is 50cm, and then L 0 =H=50cm;
So the slenderness ratio is: The stability is satisfied.
The steel upright post belongs to a b-type section rod piece in the specification of steel structure design GB 50017-2017. Stability according to class b cross section coefficient lookup table:
allowable supporting force of single steel pipe:
And (5) calculating the stress of the steel pipe column support: n=1.2×265/26 t=12.2t <143.2t, meeting the requirements.
And the steel pipe, the first supporting plate 36 and the second supporting plate 33 are coaxially arranged, so that the stress of the steel pipe, the first supporting plate and the second supporting plate is more uniform, and the use stability of the frame body 3 is ensured.
As shown in fig. 1 to 3, a plurality of stiffening ribs 35 are provided between the steel pipe and the first support plate 36 and between the steel pipe and the second support plate 33, and the stiffening ribs 35 are uniformly distributed along the circumferential direction of the steel pipe.
Specifically, the stiffening ribs 35 further improve the connection strength between the steel pipe and the first support plate 36 and between the steel pipe and the second support plate 33, thereby improving the overall structural strength of the frame 3.
As shown in fig. 1 to 3, the load bearing member 32 includes a i-beam disposed on the upper end surface of the second support plate 33 and an adjusting steel plate disposed on the upper end surface of the i-beam, the i-beam is disposed in the middle of the second support plate 33, and the buffer member 31 is disposed on the upper end surface of the adjusting steel plate.
Specifically, it should be noted that, the i-steel has good bearing capacity and light weight, in order to further improve bearing capacity, the i-steel can adopt double-spliced i-steel, and the i-steel is located in the middle of the second supporting plate 33, so that the i-steel and the second supporting plate 33 are coaxially arranged, and accordingly the stress is more uniform, the adjusting steel plate is placed on the i-steel, the elevation of the steel box girder 5 is finely adjusted, the number and the size of the adjusting steel plate can be constructed according to the construction condition, and the method is not limited.
As shown in fig. 1 to 3, an embodiment of the present application provides a jig frame assembly including at least two jig frame structures fixedly connected by a connecting member 4.
In this implementation, the bed-jig subassembly comprises two at least bed-jig structures, and every bed-jig subassembly supports a steel box girder 5 to through two at least bed-jig structures to steel box girder 5 bearing, ensure the stability of use, and fix through connecting piece 4 between the bed-jig structure, reach the problem that prevents that the bed-jig structure from overturning from taking place in the use.
As shown in fig. 1 to3, the connecting piece 4 is configured as an i-steel cross-section, and two ends of the i-steel cross-section are respectively and fixedly connected with the adjacent frame body 3.
Specifically, it should be noted that the i-steel cross-section has stronger structural strength, and both ends are fixed with the corresponding support body 3 respectively, prevent that the bed-jig structure from overturning in the use.
As shown in fig. 1 to 3, an embodiment of the present application provides an assembly structure, which includes a plurality of steel box girders 5 sequentially arranged, at least one jig frame structure is provided at the lower end of each steel box girder 5, the upper ends of the jig frame structures are connected with the lower ends of the steel box girders 5, at least two jig frame structures are provided, at least two jig frame structures are fixedly connected through a connecting piece 4, the jig frame structures are arranged below a diaphragm of the steel box girders 5, and adjacent steel box girders 5 are bolted through the beams.
Specifically, it should be noted that the steel box girders 5 are sequentially erected on the jig frame structures along the horizontal direction, namely, the steel box girders are erected on the frame body 3, the jig frame structures are at least two, the loads of the steel box girders 5 are distributed on at least two jig frame structures, the use stability is guaranteed, the jig frame structures are fixed through the connecting pieces 4, overturning in the use process is avoided, adjacent steel box girders 5 are bolted through cross beams, and the structural strength of the steel box girders 5 after being assembled is increased.
As shown in fig. 1 to 3, a steel-concrete composite beam field assembly construction method includes:
Presetting a fixing surface 1, installing a frame body 3 on the fixing surface 1, hoisting the steel box girders 5 to be assembled on the frame body 3, enabling the height of the steel box girders 5 to be 100cm below the ground, assembling a plurality of steel box girders 5 on the frame body 3, and hoisting the assembled steel box girders 5 to a girder frame; wherein,
(1) The method comprises the steps that a fixing surface 1 is preset, an embedded part is installed and positioned on the ground, and a formwork is used for pouring a concrete ground;
(2) The mounting frame body 3 is a stand column 34 with strength meeting the bearing requirement, and a first support plate 36 and a second support plate 33 are respectively welded at two ends of the stand column 34;
One end of the upright post 34 welded with the first support plate 36 is fixed with the embedded part, the second support plate 33 is fixed with the bearing part 32, and the height difference between the jig frames is adjusted by selecting the bearing parts 32 with different sizes, so that the height of the assembled jig frames is not more than 100cm;
The bearing piece 32 is provided with an adjusting steel plate, and the pre-camber and the longitudinal curve among the steel-concrete composite beams are adjusted by selecting steel plates with different thicknesses;
(3) Hoisting the steel box girders 5, namely hoisting the steel box girders 5 to be assembled onto the bearing parts 32 of the jig frame by a crane and adjusting the interval between adjacent steel box girders 5;
(4) The top of the steel box girder 5 is connected with the bridge deck plate through shear nails, the adjacent bridge deck plate forms an integral bridge deck through a longitudinal wet joint, and the adjacent steel box girder 5 is bolted through a cross beam;
(5) And integrally hoisting the spliced steel-concrete composite beam to a beam frame.
The specific mode of the step (1) is as follows: and blanking according to the design size of the foundation bolt 2, bending and forming, threading the end head, adopting a steel plate for the embedded part, punching 4 holes in the corresponding position on the steel plate by using a punching machine, installing the foundation bolt 2 and nuts to form a combined embedded part, and pouring the concrete ground by using a formwork after the embedded part is installed and positioned.
In the step (2), the upright column 34 adopts a steel pipe with phi 426x8cm, the material is Q235B, the first support plate 36 adopts a steel plate flange with 50x50x2cm, and the second support plate 33 adoptsThe steel plate, the first supporting plate 36 is fixed with the embedded part through the foundation bolt 2.
And (2) uniformly welding stiffening ribs 35 along the periphery of the steel pipe, wherein the stiffening ribs 35 are welded with the adjacent first support plate 36 and the adjacent second support plate 33.
And step (2) further comprises at least two corresponding jig frames of each steel box girder 5, wherein adjacent jig frames are connected through transverse connection, the bearing piece 32 is made of I-steel, and the height difference of each I-steel is set according to the design pre-camber of the steel-concrete composite girder.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (5)
1. The on-site assembly construction method of the steel-concrete composite beam is characterized by comprising the following steps of:
Presetting a fixing surface, installing a frame body on the fixing surface, hoisting the steel box girders to be assembled on the frame body, enabling the height of the steel box girders to be 100cm below the ground, assembling a plurality of steel box girders on the frame body, and hoisting the assembled steel box girders to a girder frame; wherein,
(1) The method comprises the steps of presetting a fixing surface, installing and positioning an embedded part on the ground, and pouring a concrete ground by a formwork;
(2) The mounting frame body is a vertical column with strength meeting the bearing requirement, and a first supporting plate and a second supporting plate are welded at two ends of the vertical column respectively;
fixing one end of the upright post welded with the first supporting plate with the embedded part, fixing the bearing part on the second supporting plate, and adjusting the height difference between the jig frames by selecting bearing parts with different sizes, wherein the height of the assembled jig frames is not more than 100cm;
mounting an adjusting steel plate on the bearing piece, and adjusting the pre-camber and the longitudinal curve among the steel-concrete composite beams by selecting steel plates with different thicknesses;
(3) Hoisting the steel box girders, namely hoisting the steel box girders to be assembled onto the bearing parts of the jig frame by a crane and adjusting the interval between adjacent steel box girders;
(4) The top of the steel box girder is connected with the bridge deck plate through shear nails, the adjacent bridge deck plate forms an integral bridge deck through a longitudinal wet joint, and the adjacent steel box girder is bolted through a cross beam;
(5) Integrally hoisting the spliced steel-concrete composite beam to a beam frame;
The jig frame comprises at least two jig frame structures, and the at least two jig frame structures are fixedly connected through connecting pieces; the connecting piece is arranged as an I-steel cross joint, and two ends of the I-steel cross joint are fixedly connected with adjacent frame bodies respectively;
the jig frame structure comprises: the frame body is used for supporting the steel box girders so that the plurality of steel box girders are assembled at a position below 100cm from the ground, and the lower end of the frame body is fixedly connected with the fixing surface;
the upper end of the frame body is provided with a buffer piece which is used for being in direct contact with the steel box girder;
the support body comprises a first support plate, an upright post, a second support plate and a bearing piece which are sequentially arranged, wherein the first support plate is used for being detachably and fixedly connected with a fixing surface, and the buffer piece is arranged at the upper end of the bearing piece;
The first supporting plate is a steel plate flange, and the steel plate flange is fixedly connected with the fixing surface through anchor bolts;
The upright post is a steel pipe, and the upper end and the lower end of the steel pipe are fixedly connected with the first support plate and the second support plate respectively;
The second supporting plate is a round steel plate welded with the upper end of the steel pipe; wherein,
The steel pipe is coaxially arranged with the first supporting plate and the second supporting plate;
The bearing piece comprises I-steel arranged on the upper end face of the second supporting plate and an adjusting steel plate arranged on the upper end face of the I-steel, the I-steel is positioned in the middle of the second supporting plate, and the buffer piece is arranged on the upper end face of the adjusting steel plate;
impact force caused by the installation of the steel box girder is buffered through the buffer piece, so that the structural integrity is ensured.
2. The steel-concrete composite beam on-site assembly construction method according to claim 1, wherein the concrete mode of the step (1) is as follows: and blanking according to the design size of the foundation bolt, bending and forming, threading the end head, adopting a steel plate for the embedded part, punching 4 holes in the corresponding position on the steel plate by using a punching machine, installing the foundation bolt and the nut to form a combined embedded part, and pouring the concrete ground by using the formwork after the embedded part is installed and positioned.
3. The method for on-site assembly construction of steel-concrete composite beams according to claim 2, wherein in the step (2), a steel pipe with phi 426 multiplied by 8cm is adopted as a vertical column, Q235B is adopted as a material, a 50 multiplied by 2cm steel plate flange is adopted as a first supporting plate, a phi 50 multiplied by 2cm steel plate is adopted as a second supporting plate, and the first supporting plate is fixed with an embedded part through foundation bolts.
4. The method for on-site assembly construction of steel-concrete composite beams according to claim 3, wherein the step (2) further comprises uniformly welding stiffening ribs around the steel pipe, and the stiffening ribs are welded with the adjacent first support plate and the adjacent second support plate.
5. The method for on-site assembly construction of steel-concrete composite beams according to claim 4, wherein the step (2) further comprises at least two corresponding jig frames for each steel box beam, adjacent jig frames are connected through transverse connection, the bearing parts are I-shaped steel, and the height difference of each I-shaped steel is set according to the design pre-camber of the steel-concrete composite beams.
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| CN202010100803.XA CN111188278B (en) | 2020-02-18 | 2020-02-18 | A method for on-site assembly of steel-concrete composite beams |
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| CN202010100803.XA CN111188278B (en) | 2020-02-18 | 2020-02-18 | A method for on-site assembly of steel-concrete composite beams |
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| CN113799946A (en) * | 2021-10-27 | 2021-12-17 | 上海外高桥造船有限公司 | Support column type jig frame |
| CN115976930B (en) * | 2022-12-21 | 2025-07-15 | 中铁九桥工程有限公司 | A composite beam prefabrication method |
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