CN115928603A - Installation method for bridge deck slab made of stainless steel composite plate - Google Patents
Installation method for bridge deck slab made of stainless steel composite plate Download PDFInfo
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- CN115928603A CN115928603A CN202310051433.9A CN202310051433A CN115928603A CN 115928603 A CN115928603 A CN 115928603A CN 202310051433 A CN202310051433 A CN 202310051433A CN 115928603 A CN115928603 A CN 115928603A
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Abstract
The invention provides an installation method of a bridge deck slab made of stainless steel composite plates, and belongs to the technical field of bridges. The method comprises the following steps: welding a first structural member serving as a lug plate on the stainless steel composite plate by a set welding method; hoisting the stainless steel composite plate to a set position through hoisting equipment and the first structural member for installation; welding a second structural member serving as an anchor plate by a set welding method; the second structural member is connected with the inhaul cable so that the bridge section bears tension through the stainless steel composite steel plate; welding the first structural member by the setting method includes: opening an open slot at one side of the clad layer of the stainless steel composite plate to expose the base layer of the stainless steel composite plate; and welding a first structural member on the base layer at the open groove. Therefore, in the hoisting process, the stainless steel composite plate can bear the tensile load in the plate thickness direction, the hoisting is safe and reliable, and the stainless steel composite plate reaching the set position can also bear the tensile load in the plate thickness direction after being connected with the inhaul cable through the second structural member.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to an installation method of a bridge deck slab of a bridge made of stainless steel composite plates.
Background
The stainless steel composite steel plate is a high-efficiency energy-saving metal material with two types of metals, wherein the stainless steel is continuously coated on a single surface or double surfaces of a base body made of carbon steel, namely the stainless steel composite steel plate comprises a base layer (a carbon steel layer) and a composite layer (a stainless steel layer).
When the stainless steel composite steel plate is used in the technical field of bridges, welding on a panel (clad layer) of the stainless steel composite steel plate is generally not allowed, and the main strength index of connection between a base layer and the clad layer is shear strength, so that the stainless steel composite steel plate cannot bear tensile force in the plate thickness direction. In the installation process of special projects, temporary lifting lugs and buckling towers (anchor plates) are required to be installed on the bridge deck for matching with a full-bridge installation scheme, so that the bridge sections can be assembled in a section suspension mode. The invention solves the problem that the bridge deck is a stainless steel composite steel plate which can bear tension in the thickness direction of the bearing plate, and the service bridge section is integrally installed in a suspension splicing manner.
Disclosure of Invention
The present invention is directed to addressing at least one of the problems in the background.
The invention provides a method for mounting a bridge deck slab made of stainless steel composite plates, which comprises the following steps:
welding a first structural member on the stainless steel composite plate by a set welding method; wherein the first structural member is a lug plate; the welding of the first structural member on the stainless steel composite plate by the set welding method comprises: opening an open slot at one side of the clad layer of the stainless steel composite plate to expose the base layer of the stainless steel composite plate; welding the first structural member on the base layer at the open slot;
connecting lifting equipment with the first structural member, and lifting the stainless steel composite plate to a set position of a bridge for installation;
welding a second structural member on the stainless steel composite plate by the set welding method, wherein the second structural member is an anchor plate;
the second structural member is connected with the inhaul cable so that the bridge section bears tension through the stainless steel composite steel plate;
and after the whole bridge is installed, removing the first structural member and the second structure, and sealing and welding the open slot by a stainless steel flux-cored welding wire.
Compared with the prior art, the installation method of the bridge deck slab made of the stainless steel composite plate has the following beneficial effects that:
this stainless steel composite sheet can be one kind and use the carbon steel to be the clad plate of base member single face cladding stainless steel, promptly, this stainless steel composite sheet includes a basic unit (the material is the carbon steel) and one sets up in the multiple layer (the material is the stainless steel) of basic unit upside, because this stainless steel composite sheet is used for installing in the settlement position of bridge to act as the decking, need carry out anticorrosive through the multiple layer, undertake the intensity of bridge, rigidity needs through the basic unit. Therefore, before the stainless steel composite plate is lifted, the first structural member serving as the lug plate can be welded on the ground by a set welding method, namely, an open slot can be formed in the upper side (the side with the compound layer) of the stainless steel composite plate, then the first structural member is welded on the part, located at the open slot, of the upper side of the base layer, then the hook of the lifting equipment can be connected with the first structural member (the lug plate), the stainless steel composite plate is lifted in a state that the base layer faces downwards and the compound layer faces upwards, the stainless steel composite plate in the state is directly placed at a set position of a bridge, the lifting mode is simple, after the base layer is connected with other structures of the bridge, the compound layer faces upwards, and an anti-corrosion effect can be achieved. And because the upper side of the stainless steel composite plate is provided with the open slot, and the part of the upper side surface of the base layer is exposed through the open slot, the first structural member can be directly welded and fixed with the base layer exposed at the open slot instead of being welded and fixed with the multiple layers. After the stainless steel composite board serving as the bridge deck is hoisted in the sections, the second component anchor plate is welded, so that the bridge sections can be integrally assembled in a suspension mode. And after the integral installation of the bridge is finished, removing the first structural member and the second structural member, and performing sealing welding operation on the open slot at the first structural member and the open slot at the second structural member through the stainless steel flux-cored welding wire, so that the composite layer made of the stainless steel is filled and leveled, and the outward upper side of the stainless steel composite plate has complete corrosion resistance.
Further, set up the open slot in compound layer one side of stainless steel composite sheet to expose the basic unit of stainless steel composite sheet, include:
and planing off the composite layer in a set area by a plasma gas planer on one side of the composite layer of the stainless steel composite plate to form the open slot.
Further, the depth of the open slot is greater than the thickness of the multiple layers, the width of the open slot is greater than the thickness of the first structural member, and the length of the open slot is greater than the length of the first structural member.
Further, the method for removing the multiple layers in the set area by using a plasma gas planer comprises the following steps: nitrogen is used as compressed gas of the plasma gas planer, so that the angle between a gas planer gun of the plasma gas planer and the stainless steel composite plate is in the range of 25-30 degrees, the current of the plasma gas planer is in the range of 85-95A, and the gas planer speed of the plasma gas planer is in the range of 0.95-1.1 m/min.
Furthermore, after an open slot is opened at one side of the clad layer of the stainless steel composite plate to expose the base layer of the stainless steel composite plate, the method further comprises the following steps:
and polishing the base layer exposed at the open slot.
Further, the welding the first structural member on the base layer at the open groove includes:
and welding the first structural member by a flux-cored wire, wherein the sizes of welding grooves on two opposite sides of the first structural member are different.
Further, the welding a first structural member on the base layer at the open groove further includes:
the horizontal welding current of the first structural member is in the range of 240-260A, the voltage is in the range of 28-30V, and the welding speed is in the range of 25-30 cm/min.
Further, the removing the first structural member and performing a sealing process on the open slot by using a stainless steel flux-cored welding wire comprises:
flame cutting the first structural member along a set plane; wherein the set plane is located within the surface of the cladding;
and performing sealing welding operation on the open slot through the stainless steel flux-cored wire, and enabling the surface after sealing welding to be flush with the surface of the compound layer.
Further, after the sealing operation is performed on the open slot by the stainless steel flux-cored wire and the surface after the sealing operation is flush with the surface of the clad layer, the method further includes:
and welding a stainless steel plate on the surface of the composite layer, and enabling the stainless steel plate to cover the surface of the open slot after sealing and welding.
Further, the welding a stainless steel plate on the surface of the clad layer, and covering the welded surface of the open slot with the stainless steel plate, includes: welding the stainless steel plate by an E316L welding wire, and enabling the welding current to be in the range of 160-180A, the voltage to be in the range of 26-28V and the layer temperature to be below 100 ℃.
Drawings
FIG. 1 is a top view of a stainless steel composite plate according to an embodiment of the present invention after an open slot is formed in the upper side thereof;
FIG. 2 is a side cross-sectional view of a first structural member of an embodiment of the present invention prior to bonding with a base layer;
FIG. 3 is a side cross-sectional view of a first structural member and a base layer after bonding in accordance with an embodiment of the present invention;
FIG. 4 is a side cross-sectional view of the open channel after removal of the first structural member and sealing of the open channel in accordance with an embodiment of the present invention;
FIG. 5 is a cross-sectional side view of a stainless steel plate welded to a clad layer according to an embodiment of the present invention;
FIG. 6 is a cross-sectional side view of a joint test performed after welding an equal-ratio tapered composite panel to two joint tie plates according to an embodiment of the present invention;
fig. 7 is a flowchart of an installation method of a bridge deck slab made of stainless steel composite plates according to an embodiment of the present invention.
Description of reference numerals:
1. a stainless steel composite board; 11. a base layer; 12. laminating; 2. an open slot; 21. a welding area; 22. an extension area; 3. a first structural member; 31. welding a groove; 4. a joint pulling plate; 5. a stainless steel plate; 6. reducing the composite board in equal proportion; 61. scaling down the base layer; 62. reducing the multiple layers in an equal ratio; m, setting a plane; h. setting the distance from the plane to the surface of the multiple layer; a. the width of the welding groove on the right side of the first structural member; b. the width of the welding groove on the left side of the first structural member.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Also, in the drawings, the Z-axis represents a vertical, i.e., up-down position, and a positive direction of the Z-axis (i.e., an arrow direction of the Z-axis) represents up, and a negative direction of the Z-axis (i.e., a direction opposite to the positive direction of the Z-axis) represents down; in the drawings, the Y-axis represents the lateral, i.e., left-right, position, and the positive direction of the Y-axis (i.e., the arrow direction of the Y-axis) represents the left, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) represents the right; in the drawings, the X-axis indicates the longitudinal direction, i.e., the front-rear position, and the positive direction of the X-axis (i.e., the arrow direction of the X-axis) indicates the front and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) indicates the rear.
It should also be noted that the foregoing Z-axis, X-axis, and Y-axis representations are merely intended to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be oriented, constructed or operated in a particular orientation and therefore should not be construed as limiting the invention.
Referring to fig. 1 to 5 and 7, an installation method of a bridge deck plate made of stainless steel composite plates according to an embodiment of the present invention includes:
welding a first structural member 3 on the stainless steel composite plate 1 by a set welding method; wherein the first structural member is a lug plate; the welding of the first structural member 3 on the stainless steel composite plate 1 by the set welding method includes: an open slot 2 is formed in one side of a composite layer 12 of a stainless steel composite plate 1 so as to expose a base layer 11 of the stainless steel composite plate 1; welding the first structural member 3 on the base layer 11 at the open groove 2;
connecting a hoisting device with the first structural member 3, and hoisting the stainless steel composite plate 1 to a set position of a bridge for installation;
welding a second structural member on the stainless steel composite plate 1 by the set welding method, wherein the second structural member is an anchor plate;
the second structural member is connected with the inhaul cable so that the bridge section bears tension through the stainless steel composite steel plate;
and after the whole bridge is installed, removing the first structural member 3 and the second structure, and sealing and welding the open slot 2 by a stainless steel flux-cored welding wire.
In this embodiment, the stainless steel composite board 1 may be a composite board with a single-side coated stainless steel substrate made of carbon steel, that is, the stainless steel composite board 1 includes a base layer 11 (made of carbon steel) and a composite layer 12 (made of stainless steel) disposed on the upper side of the base layer 11, and since the stainless steel composite board 1 is used for being installed at a predetermined position of a bridge to serve as a bridge deck, it is necessary to perform corrosion prevention through the composite layer 12, and the base layer 11 is used for bearing the strength and rigidity of the bridge.
Therefore, before the stainless steel composite board 1 is lifted, the first structural member 3 serving as the lug plate can be welded on the ground by a set welding method in the embodiment, that is, an open slot 2 can be formed in the upper side (the side with the composite layer 12) of the stainless steel composite board 1, then the first structural member 3 is welded at the part, located at the open slot 2, of the upper side of the base layer 11, then the hook of the lifting equipment can be connected with the first structural member 3 (the lug plate), so that the stainless steel composite board 1 is lifted in a state that the base layer 11 faces downwards and the composite layer 12 faces upwards, the stainless steel composite board 1 in the state is directly placed at a set position of the bridge, the lifting mode is simple, and after the base layer 11 is connected with other structures of the bridge, the composite layer 12 faces upwards and outwards, and an anti-corrosion effect can be achieved.
Moreover, because the open slot 2 is formed in the upper side of the stainless steel composite plate 1, and the part of the upper side surface of the base layer 11 is exposed through the open slot 2, the first structural member 3 can be directly welded and fixed with the base layer 11 exposed at the open slot 2 instead of being welded and fixed with the composite layer 12, and the connecting mode of welding and fixing the first structural member 3 is adopted, so that the stainless steel composite plate 1 can bear a large tensile load in the plate thickness direction in the lifting process, and the lifting is safe and reliable.
And, after the stainless steel composite board 1 serving as the bridge deck is hoisted in the segment, the second component anchor plate is welded, so that the bridge segment can be integrally assembled in a suspension manner. And after the bridge is installed, removing the first structural member and the second structural member, and performing sealing welding operation on the open slot at the first structural member 3 and the open slot at the second structural member through the stainless steel flux-cored welding wire, so that the composite layer made of the stainless steel is filled and leveled, and the outward upper side of the stainless steel composite plate has complete corrosion resistance.
In the present embodiment, the reason why the first structural member 3 is welded directly to the base layer 11, not to the composite layer 12, is that if the first structural member is welded to the composite layer 12, when the stainless steel composite plate 1 is subjected to a tensile load in the plate thickness direction, the connection between the base layer 11 and the composite layer 12 may become unstable, that is, the composite layer 12 may be separated from the base layer 11.
Referring to fig. 1, optionally, the method for forming an open slot 2 on one side of a clad layer 12 of a stainless steel composite plate 1 to expose a base layer 11 of the stainless steel composite plate 1 includes:
and (2) removing the compound layer 12 in a set area by a plasma gas planer on one side of the compound layer 12 of the stainless steel composite plate 1 to form the open slot 2.
In this embodiment, the plasma gas planer is adopted to dig the multiple layer 12 in the setting area at the upper side of the stainless steel composite board 1 to form the open slot 2, and then the upper side of the base layer 11 and the part corresponding to the setting area are exposed.
Referring to fig. 1, optionally, the depth of the open slot 2 is greater than the thickness of the cladding 12, the width of the open slot 2 is greater than the thickness of the first structural member 3, and the length of the open slot 2 is greater than the length of the first structural member 3.
In this embodiment, for example, the thickness of the composite layer 12 of the stainless steel composite plate 1 is 3mm, and the lug plate with the welding thickness of 20mm is used for illustration, the depth of the ion gas planer for removing can be 3.5mm, and then it is ensured that the opening groove 2 is opened and completed, even if there is an operation error, the depth of the opening groove 2 after removing can also be greater than or equal to 3mm, that is, the upper side of the base layer 11 can be exposed, and the operation difficulty of removing is reduced. The width of the open slot 2 planed by the ion air planer can be 50mm, and the length of the open slot 2 planed by the ion air planer can be the length of the lug plate plus 100mm. Like this, open slot 2 has the welding area 21 that is used for welding the lug plate usefulness in addition, still has expanded region 22, welding area 21 is located the central authorities of open slot 2, so, the distance that the both ends correspond the lateral wall to open slot 2 about welding area 21 is (50/2-20/2) =15mm, the distance that the both ends of welding area 21 length direction correspond the lateral wall to open slot 2 is 100/2=50mm, so, guarantee that the anchor arm-tie plate is located behind welding area 21, the left side of lug plate, the right side, the front side and the rear side all have the space, guarantee the welding sight, also provide the space for each welding seam, improved welding quality and welding qualification rate, avoid welding defect.
Optionally, removing the multiple layer 12 of the set area by a plasma gas planer comprises: nitrogen is used as compressed gas of the plasma gas planer, so that the angle between a gas planer gun of the plasma gas planer and the stainless steel composite plate 1 is in the range of 25-30 degrees, the current of the plasma gas planer is in the range of 85-95A, and the gas planing speed of the plasma gas planer is in the range of 0.95-1.1 m/min.
In the embodiment, through a large number of experiments, nitrogen is used as the compressed gas of the plasma gouging machine, in order to obtain a wide and shallow gouging amount (namely, in order to obtain a wide and shallow open slot 2), the angle of a gouging gun is controlled to be 25-30 degrees, the current is in the range of 85-95A, and the gouging speed is in the range of 0.95-1.1m/min, so that a slot with the width of 25mm and the depth of 3.5mm can be gouged once, and after gouging twice, the open slot 2 with the width of 50m and the depth of 3.5mm can be obtained, the difficulty in opening the open slot 2 is reduced, the step of opening the open slot 2 is reduced, and the efficiency is improved.
Optionally, after the opening slot 2 is opened at one side of the clad layer 12 of the stainless steel composite plate 1 to expose the base layer 11 of the stainless steel composite plate 1, the method further includes:
the base layer 11 exposed at the open groove 2 is polished.
In this embodiment, after the open slot 2 is gouged, the sidewall of the open slot 2 needs to be polished, and at least the bottom wall (the portion of the substrate on the side of the open slot 2) of the open slot 2 is polished to eliminate an oxide layer caused by gouging, so as to ensure the subsequent welding yield and quality and avoid welding defects.
Further, the welding of the first structural member 3 on the base layer 11 at the open slot 2 includes:
the first structural member 3 is welded by a flux-cored wire, and the welding grooves 31 on opposite sides of the first structural member 3 are made to have different sizes.
In this embodiment, the stainless steel material of the clad layer 12 of the stainless steel clad plate 1 is 316L, and the carbon steel material of the base layer 11 is Q370qE, and since the carbon steel material of the base layer 11 is Q370qE, when the first structural member 3 is welded, the welding is performed by the welding material steel flux-cored wire T494T1-1C1AUH5 corresponding to the Q370qE stainless steel, so as to ensure the welding quality of the two.
In addition, referring to fig. 2, before welding, the welding groove 31 on the left side of the first structural member 3 is different in size from the welding groove 31 on the right side, the width b of the welding groove 31 on the left side is smaller than the width a of the welding groove 31 on the right side, and a-b may be equal to 6mm, so that the welding deformation is reduced and the welding quality and the yield are improved by using the welding groove 31 with one larger and one smaller size.
Optionally, the welding the first structural member 3 on the base layer 11 at the open slot 2 further includes:
the horizontal welding current of the first structural component 3 is in the range of 240-260A, the voltage is in the range of 28-30V, and the welding speed is in the range of 25-30 cm/min.
In the embodiment, when the carbon steel material of the base layer 11 is Q370qE, and the first structural member 3 is welded, through a plurality of tests, the horizontal welding current is controlled within the range of 240-260A, the voltage is controlled within the range of 28-30V, and the welding speed is controlled within the range of 25-30cm/min, so that the welding quality and the yield can be ensured.
Referring to fig. 6, optionally, another embodiment of the present invention further provides a tensile testing method, including:
according to the welding method of the first structural member 3, firstly, a groove structure is arranged on one side of the equal-ratio shrinkage composite board 6 on the equal-ratio shrinkage composite layer 62 to expose part of the upper side surface of the equal-ratio shrinkage base layer 61, the upper joint pulling plate 4 is welded on the upper side of the equal-ratio shrinkage base layer 61, and then, a lower joint pulling plate 4 is symmetrically welded on the lower side of the equal-ratio shrinkage base layer 61; tensile tests are carried out by applying tensile loads to the two joint pulling plates 4, and low-temperature impact tests are carried out to detect the yield strength and tensile strength of the isometric reduced composite plate 6.
In the embodiment, by the tensile test method, the yield strength Rel is 497MPa and the tensile strength Rm is 572MPa after sampling, wherein the low-temperature impact value of the upper joint is 120, 97 and 86J. The installation method for the bridge deck slab to be the stainless steel composite plate according to the present invention is explained, when the stainless steel composite plate 1 is lifted, the plate thickness direction can bear a large tensile load, and the lifting is safe and reliable, and similarly, after the second structural member as the anchor plate is welded by the same welding method, the stainless steel composite plate 1 can also bear a large tensile load given by the guy cable in the plate thickness direction, and is safe and reliable.
Referring to fig. 3 and 4, optionally, the removing the first structural member 3 and performing a sealing process on the open slot 2 by using a stainless steel flux-cored wire comprises:
flame cutting the first structural member 3 along a set plane; wherein the set plane is located within the surface of the clad layer 12;
and performing sealing welding operation on the open slot 2 through the stainless steel flux-cored welding wire, and enabling the surface after sealing welding to be flush with the surface of the compound layer 12.
In this embodiment, when flame cutting is performed on the first structural member 3, a plane is set, that is, the cutting surface is lower than and close to the upper side surface of the composite layer 12, for example, the distance h between the cutting surface and the upper side surface of the composite layer 12 is greater than 0mm and less than 2mm, and specifically, h is 1mm. In this way, after the first structural member 3 above the cutting surface is cut off, the top of the rest part of the first structural member 3 left on the base layer 11 is lower than the upper side surface of the composite layer 12, so that after sealing and welding, the material of the stainless steel flux-cored wire can cover the rest part of the first structural member 3 in all directions, and the open slot 2 is filled with the material. Wherein, 309LMo welding wire is adopted as the stainless steel flux-cored welding wire, and 309LMo welding wire is a high chromium nickel type welding material, so as to supplement the dilution of carbon steel to stainless steel and reduce the burning loss of alloy elements in the compound layer 12 in the welding process.
Referring to fig. 5, after the sealing operation is performed on the open slot 2 by the stainless steel flux-cored wire and the sealed surface is flush with the surface of the composite layer 12, the method further includes:
and welding a stainless steel plate 5 on the surface of the composite layer 12, and enabling the stainless steel plate 5 to cover the welded surface of the open slot 2.
In this embodiment, the corrosion resistance of the set region can be further improved by welding the stainless steel plate 5.
Optionally, the welding a stainless steel plate 5 on the surface of the cladding 12, and making the stainless steel plate 5 cover the sealed and welded surface of the open slot 2, includes: welding the stainless steel plate 5 by an E316L welding wire, and enabling the welding current to be in the range of 160-180A, the voltage to be in the range of 26-28V and the layer temperature to be below 100 ℃.
In the embodiment, the stainless steel material of the composite layer 12 of the stainless steel composite plate 1 is 316L, the type of the welding wire for welding the stainless steel plate 5 is E316L, the welding wire is matched with the composite layer 12 in an equal component mode, the layer temperature is controlled to be below 100 ℃, cracks are avoided during welding, the current is controlled to be 160-180A, the voltage is controlled to be 26-28V, and the welding qualification rate is further improved.
It should be noted that, when the stainless steel composite plate 1 at the set position is no longer suspended, the second structural member as the anchor plate may be removed and the corresponding open slot may be sealed, and the method of removing the second structural member as the anchor plate and sealing the corresponding open slot may be the same as the method of removing the first structural member 3 as the lug plate and sealing the corresponding open slot.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. The mounting method for the bridge deck slab made of the stainless steel composite plate is characterized by comprising the following steps of: welding a first structural member (3) on the stainless steel composite plate (1) by a set welding method; wherein the first structural member is a lug plate; the welding of the first structural member (3) on the stainless steel composite plate (1) by the set welding method comprises the following steps: an open slot (2) is formed in one side of a compound layer (12) of the stainless steel composite plate (1) so as to expose a base layer (11) of the stainless steel composite plate (1); welding the first structural member (3) on the base layer (11) at the open slot (2);
connecting a hoisting device with the first structural member (3), and hoisting the stainless steel composite plate (1) to a set position of a bridge for installation;
welding a second structural part on the stainless steel composite plate (1) by the set welding method, wherein the second structural part is an anchor plate;
the second structural member is connected with the inhaul cable so that the bridge section bears tension through the stainless steel composite steel plate;
and after the whole bridge is installed, removing the first structural component (3) and the second structural component, and sealing and welding the open slot (2) through a stainless steel flux-cored welding wire.
2. The method for installing a bridge deck slab made of stainless steel composite plates according to claim 1, wherein the opening groove (2) is opened on one side of the clad layer (12) of the stainless steel composite plate (1) to expose the base layer (11) of the stainless steel composite plate (1), and the method comprises the following steps:
and (2) planing the composite layer (12) in a set area through a plasma gas planer on one side of the composite layer (12) of the stainless steel composite plate (1) to form the open slot (2).
3. The method of installing a composite stainless steel deck slab as claimed in claim 2, wherein the depth of the open slot (2) is greater than the thickness of the cladding (12), the width of the open slot (2) is greater than the thickness of the first structural member (3), and the length of the open slot (2) is greater than the length of the first structural member (3).
4. A method of installing a bridge deck slab as defined in claim 3 of stainless steel composite panels, wherein removing said cladding (12) in defined areas by means of a plasma air gouging machine comprises: nitrogen is used as compressed gas of the plasma gas planer, so that the angle between a gas planer gun of the plasma gas planer and the stainless steel composite plate (1) is in the range of 25-30 degrees, the current of the plasma gas planer is in the range of 85-95A, and the gas planing speed of the plasma gas planer is in the range of 0.95-1.1 m/min.
5. The method for installing the bridge deck slab as claimed in claim 1, wherein the method further comprises opening the open slot (2) at one side of the clad layer (12) of the stainless steel composite plate (1) to expose the base layer (11) of the stainless steel composite plate (1): and polishing the base layer (11) exposed at the open slot (2).
6. The method for installing a bridge deck slab as claimed in claim 1, wherein said welding of said first structural member (3) on said base layer (11) at said open slot (2) comprises:
and welding the first structural member (3) by a flux-cored wire, wherein the welding grooves (31) on two opposite sides of the first structural member (3) are different in size.
7. The method for installing a bridge deck slab as claimed in claim 6, wherein the welding of the first structural member (3) on the base layer (11) at the open slot (2) further comprises:
the horizontal position welding current of the first structural component (3) is in the range of 240-260A, the voltage is in the range of 28-30V, and the welding speed is in the range of 25-30 cm/min.
8. The method for installing a stainless steel composite plate as a bridge deck slab according to claim 1, wherein the removing the first structural member (3) and performing a sealing process on the open slot (2) by using a stainless steel flux cored wire comprises:
flame cutting the first structural part (3) along a set plane; wherein the set plane is located within the surface of the cladding (12);
and sealing and welding the open slot (2) through the stainless steel flux-cored welding wire, and enabling the surface after sealing and welding to be flush with the surface of the composite layer (12).
9. The method for installing a stainless steel composite plate as a bridge deck slab according to claim 8, wherein after the sealing operation of the open slot (2) by the stainless steel flux-cored wire and the surface after the sealing operation is flush with the surface of the cladding layer (12), the method further comprises:
and welding a stainless steel plate (5) on the surface of the composite layer (12), and enabling the stainless steel plate (5) to cover the sealed and welded surface of the open slot (2).
10. The method for installing a stainless steel composite plate as a bridge deck slab according to claim 9, wherein the welding of the stainless steel plate (5) on the surface of the clad layer (12) and the covering of the welded surface of the open slot (2) by the stainless steel plate (5) comprise: welding the stainless steel plate (5) by an E316L welding wire, and enabling the welding current to be in the range of 160-180A, the voltage to be in the range of 26-28V and the layer temperature to be below 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310051433.9A CN115928603A (en) | 2023-02-02 | 2023-02-02 | Installation method for bridge deck slab made of stainless steel composite plate |
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| CN202310051433.9A CN115928603A (en) | 2023-02-02 | 2023-02-02 | Installation method for bridge deck slab made of stainless steel composite plate |
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