CN217997856U - Reinforced structure for increasing cross section of arch rib of concrete filled steel tube arch bridge - Google Patents
Reinforced structure for increasing cross section of arch rib of concrete filled steel tube arch bridge Download PDFInfo
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- CN217997856U CN217997856U CN202222162653.2U CN202222162653U CN217997856U CN 217997856 U CN217997856 U CN 217997856U CN 202222162653 U CN202222162653 U CN 202222162653U CN 217997856 U CN217997856 U CN 217997856U
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Abstract
The embodiment of the application provides an arch of steel pipe concrete arch bridge arch rib increase cross-section reinforced structure, belongs to steel pipe concrete arch bridge technical field. The reinforced structure is used for reinforcing the original arch rib and comprises outsourcing steel and a filling part, the outsourcing steel comprises a first substrate and a second substrate, the first substrate and the second substrate are connected with each other so that the outsourcing steel sleeve is arranged on the outer peripheral side of the original arch rib, and a space is formed between the inner wall of the outsourcing steel and the outer wall of the original arch rib so as to form a filling space between the outsourcing steel and the original arch rib; the filling part is filled in the filling space and used for connecting the outer steel wrap and the original arch rib into a whole; wherein, be equipped with adjusting part on the outsourcing steel, adjusting part is used for adjusting the relative position of outsourcing steel and former arch rib. The reinforced structure for the arch rib of the concrete-filled steel tube arch bridge can increase the bearing capacity and the overall rigidity of the arch bridge and increase the safety factor of the arch bridge.
Description
Technical Field
The application relates to the technical field of steel pipe concrete arch bridges, in particular to a reinforced structure for an arch rib increased section of a steel pipe concrete arch bridge.
Background
The steel tube concrete arch bridge is a unique steel-concrete combined bridge, and has the advantages of beautiful shape, reasonable structure and convenient construction. The steel pipe concrete arch rib is a main bearing component of the arch bridge, and the quality of the arch rib is directly related to the bearing capacity and stability of the whole bridge. The concrete-filled steel tube arch rib has the advantages that the hoop effect of the outer-coated steel tube can improve the bearing capacity of concrete, the inner filling concrete restrains the outer-coated steel tube, the local buckling of the steel tube is prevented, the local stability of the steel tube is improved, and the inner wall of the steel tube is bonded with the concrete to form a whole stress body.
Due to the difference of concrete and steel pipe materials, local climatic conditions, construction process and construction quality control, the concrete in the pipe and the steel pipe can be subjected to void, gaps and hollows are generated, other common diseases of the arch rib mainly include steel pipe corrosion and welding cracks, the steel pipe corrosion mainly refers to the phenomena of cracking, peeling and the like of the surface of a coating on the surface of the steel pipe due to collision in the construction process or coating quality problems, and finally the steel pipe is corroded under the corrosion of rainwater and air. The welding cracks are mainly generated due to problems of welding process and welding quality, and the welding defects can cause fatigue cracks of the steel pipe, and finally cause fatigue failure of the steel pipe. Under the combined action of stress and corrosive media, welding cracks can develop rapidly, and the safety performance of the bridge is damaged. At present, methods for locally reinforcing the steel pipe concrete arch rib mainly comprise a secondary grouting method, an external collar method and the like, and the method for integrally reinforcing the steel pipe concrete arch rib is yet to be researched.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a steel pipe concrete arch bridge arch rib increases cross-section reinforced structure, can increase the bearing capacity and the bulk rigidity of arch bridge, increases arch bridge's factor of safety.
The embodiment of the application provides a reinforced structure for increasing the cross section of an arch rib of a steel pipe concrete arch bridge, the reinforced structure is used for reinforcing an original arch rib and comprises outer steel and a filling part, the outer steel comprises a first substrate and a second substrate, the first substrate and the second substrate are mutually connected in a surrounding manner, so that the outer steel can be sleeved on the outer peripheral side of the original arch rib, a space is reserved between the inner wall of the outer steel and the outer wall of the original arch rib, and a filling space is formed between the outer steel and the original arch rib; the filling part is filled in the filling space and used for connecting the outer steel wrap and the original arch rib into a whole; wherein, be equipped with adjusting part on the outsourcing steel, adjusting part is used for adjusting the relative position of outsourcing steel and former arch rib.
In this scheme, through including being first base plate and second base plate with the outsourcing steel, make the outsourcing steel be the components of a whole that can function independently combination formula, first base plate and second base plate can part from each other and combine promptly, be convenient for establish the periphery side at former arch rib with the outsourcing steel bushing, then the position of accessible adjusting part outsourcing steel for former arch rib carries out the regulation that becomes more meticulous, the accurate control of outsourcing steel in the installation has been realized, reinforced structure's engineering quality has been guaranteed, and adjusting part can adjust the space of filling between outsourcing steel and the former arch rib, then the mode that utilizes filling portion to fill is connected as an organic whole with outsourcing steel and former arch rib, and then the stability of guaranteeing the outsourcing steel, it is obvious to the reinforcement effect of former arch rib.
In some embodiments, the first base plate and the second base plate are both in a C-shaped cross section, the adjacent sides of the first base plate and the second base plate are both provided with adjusting brackets, and the adjusting brackets are provided with first bolt holes; the adjusting assembly comprises a first bolt, and the first bolt penetrates through first bolt holes in the first base plate and the second base plate and is locked through a first nut, so that the first base plate and the second base plate are connected.
Among the above-mentioned technical scheme, all be C shape through the cross sectional shape with first base plate and second base plate, first base plate and second base plate are processed into C shape or U-shaped by the steel sheet according to former arch rib outline promptly, and all be provided with the regulation bracket in first base plate and adjacent one side of second base plate, utilize the first bolt among the regulating assembly, first bolt passes first bolt hole on first base plate and the second base plate and through first nut locking back, alright realize being connected of first base plate and second base plate, realize the temporary fixation of first base plate and second base plate, be convenient for outsourcing steel and install on former arch rib, and first bolt and first nut cooperation, can also adjust the clearance of first base plate and second base plate, make the outsourcing steel satisfy dimensional design requirement.
In some embodiments, the adjusting assembly further comprises second bolts, second bolt holes for the second bolts to pass through are correspondingly formed in the side surfaces of the first base plate and the second base plate and the adjusting bracket, and the number of the second bolts corresponds to the number of the second bolt holes one to one; the second bolt is in threaded fit with the second bolt hole, and one end of each second bolt on each side surface of the outer clad steel can abut against the outer wall of the original arch rib so as to adjust the distance under the rotating action of the second bolt along the axis of the second bolt.
Among the above-mentioned technical scheme, through including a plurality of second bolts in the adjusting part, all correspond on each side of first base plate and second base plate and the regulation bracket and be provided with the second bolt hole that supplies the second bolt to pass, under the effect of second bolt, can adjust each side of outsourcing steel and the distance of former arch rib, and then carry out the fine adjustment to the installation space of outsourcing steel for the spatial position of outsourcing steel adjusts conveniently. More importantly, the second bolt in the adjusting assembly is used for acting on the outer steel through rotation of the second bolt, pre-arching installation of the outer steel can be achieved, downward back pressure of the outer steel and upward unloading of the original arch rib are achieved through the adjusting assembly after the outer steel is folded, the adjusting assembly is detached after filling materials (concrete) in an outer steel filling space reach strength, partial unloading of the original arch rib is undertaken by the concrete in the outer steel, and the using efficiency of the concrete in the outer steel is improved.
In some embodiments, the first base plate and the second base plate are provided with a second nut on the inner side wall of the second bolt hole, and the screw hole on the second nut is communicated with the second bolt hole for the second bolt to pass through and be in threaded fit with.
Among the above-mentioned technical scheme, under the thinner condition of the thickness of first base plate and second base plate, the screw hole thickness of second bolt hole is thinner on the outsourcing steel, the smooth condition of silk of second bolt appears easily, consequently, through all being provided with the second nut at the inside wall of second bolt hole on first base plate and second base plate, the second nut can with second bolt screw-thread fit, even like this the second bolt hole on first base plate and the second base plate is ordinary connecting hole, also can guarantee the screw-thread fit relation between second bolt and the outsourcing steel, under the rotation of second bolt, carry out accurate regulation to the relative position of outsourcing steel and former arch rib.
In some embodiments, the number of the outer steel packages is set to be a plurality in the arch direction of the original arch rib, the plurality of the outer steel packages are sequentially distributed on the original arch rib along the arch direction of the original arch rib, the adjacent two outer steel packages are sequentially connected, and each outer steel package is provided with the adjusting component.
Among the above-mentioned technical scheme, because the span of former arch rib is generally great, for the hoist and mount of outsourcing steel and reduce the construction degree of difficulty, establish a plurality ofly through the quantity with outsourcing steel, a plurality of outsourcing steel each other the concatenation on the arch direction of former arch rib to under the concatenation effect of a plurality of outsourcing steels, accomplish the installation of former arch rib full bridge section.
In some embodiments, in the plurality of the outer steel packages, the outer steel package at the arch springing position is provided with the grouting holes, and the outer steel package at the arch crown position is provided with the grout outlet holes.
Among the above-mentioned technical scheme, through being equipped with the mud jacking hole on the outsourcing steel that is located arch springing position department, be located vault position department the outsourcing steel is equipped with out the thick liquid hole, adopts by lower supreme slip casting promptly, under the antigravity effect, lets the filling material in the filling space extrude from bottom to top to make filling material more solid in the filling space, improved filling material's filling effect.
In some embodiments, stiffening ribs are provided on the clad steel.
Among the above-mentioned technical scheme, through be provided with stiffening rib on the outsourcing steel, stiffening rib can increase the shear capacity of outsourcing steel, and then strengthens the bulk rigidity of outsourcing steel.
To sum up, the main beneficial effect of this scheme lies in:
1. the method has the advantages of simple operation, good engineering quality, simple operation and good construction quality, and can realize the accurate control of the shape of the steel cladding and the relative position of the steel cladding and the original arch rib through the adjusting assembly.
2. Realize new and old structure common atress, it is obvious to consolidate the effect. The steel ladle can be pre-arched and installed through the adjusting assembly, downward back pressure of the steel ladle and upward unloading of original arch ribs are achieved through the adjusting assembly after the steel ladle is folded, the adjusting device is detached after concrete in the steel ladle reaches strength, the steel ladle concrete is wrapped to bear partial unloading of the original arch ribs, the use efficiency of the steel ladle concrete is improved, and the reinforcing effect is obvious.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a steel pipe concrete arch bridge rib reinforced section reinforcing structure provided with an arch according to some embodiments of the present application and matched with an arch bridge;
FIG. 2 is a schematic structural view of the clad steel of FIG. 1;
FIG. 3 is a schematic structural view of the outer clad steel in FIG. 1 in a wind bracing section;
FIG. 4 is a sectional view of an installation of an arch rib reinforcement structure of a steel pipe concrete arch bridge according to some embodiments of the present application;
FIG. 5 is a schematic view of the adjustment assembly of FIG. 4 at the position of the adjustment bracket;
FIG. 6 is a partial schematic view of the second bolt of the adjustment assembly of FIG. 4 engaged with the overcladding steel;
FIG. 7 is a schematic view of the adjusting assembly of FIG. 4 moving the overcladding steel upward;
fig. 8 is a schematic view illustrating the structure of the adjusting assembly of fig. 4 for moving down the outer clad steel.
An icon: 10-steel wrapping; 11-a first substrate; 12-a second substrate; 13-a second bolt hole; 14-a second nut; 15-a first half-plate; 16-a second half-plate; 17-avoiding holes; 20-an adjustment assembly; 21-a first bolt; 22-a second bolt; 30-adjusting the bracket; 31-a first bolt hole; 32-a first nut; 40-a mud jacking port; 41-a pulp outlet; 50-a stiffener; 60-a filling part; 200-original arch rib.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated 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 application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Examples
In a first aspect, an embodiment of the present application provides a reinforced structure for increasing a cross section of a steel pipe concrete arch bridge arch rib, the reinforced structure is used for reinforcing an original arch rib, please refer to fig. 1 and 2, the reinforced structure includes an outer clad steel 10 and a filling part 60, the outer clad steel 10 includes a first substrate 11 and a second substrate 12, the first substrate 11 and the second substrate 12 are connected to each other, so that the outer clad steel 10 is sleeved on an outer peripheral side of the original arch rib 200, and a gap is provided between an inner wall of the outer clad steel 10 and an outer wall of the original arch rib 200, so that a filling space is formed between the outer clad steel 10 and the original arch rib 200; the filling part 60 is filled in the filling space, and the filling part 60 is used for connecting the outer steel cladding 10 and the original arch rib 200 into a whole; wherein, the outsourcing steel 10 is provided with an adjusting component 20, and the adjusting component 20 is used for adjusting the relative position of the outsourcing steel 10 and the original arch rib 200.
In the scheme, the outsourcing steel 10 comprises the first substrate 11 and the second substrate 12, so that the outsourcing steel 10 is in a split combined type, namely the first substrate 11 and the second substrate 12 can be mutually separated and combined, the outsourcing steel 10 is conveniently sleeved on the outer peripheral side of the original arch rib 200, then the position of the outsourcing steel 10 relative to the original arch rib 200 is finely adjusted through the adjusting component 20, accurate control of the outsourcing steel 10 in the installation process is achieved, the engineering quality of a reinforcing structure is guaranteed, the filling space between the outsourcing steel 10 and the original arch rib 200 can be adjusted through the adjusting component 20, then the outsourcing steel 10 and the original arch rib 200 are connected into a whole in a filling mode through the filling part 60, the stability of the outsourcing steel 10 is further guaranteed, and the reinforcing effect of the original arch rib 200 is obvious.
The clad steel 10 may be made of various materials, and in this embodiment, the clad steel 10 is formed by machining a steel plate. The first substrate 11 and the second substrate 12 may have the same or different cross-sectional shapes. In the present embodiment, the first substrate 11 and the second substrate 12 have the same cross-sectional shape, and the first substrate 11 and the second substrate may have a C-shape or a U-shape. In addition, the net distance between the outer-coated steel 10 and the original arch rib 200 is determined according to the force calculation and is not less than 10cm. Referring to fig. 3, the first substrate 11 or the second substrate 12 of the outer-clad steel 10 may be further divided into an upper portion and a lower portion, for example, the outer-clad steel may include a first half plate 15 and a second half plate 16, and the first half plate 15 and the second half plate 16 are provided with avoiding holes 17 corresponding to the positions of the wind braces.
In some embodiments, referring to fig. 2 and 4, the cross-sectional shapes of the first base plate 11 and the second base plate are both C-shaped, the adjacent sides of the first base plate 11 and the second base plate 12 are both provided with an adjusting bracket 30, and the adjusting bracket 30 is provided with a first bolt hole 31; the adjusting assembly 20 includes a first bolt 21, and the first bolt 21 passes through a first bolt hole 31 on the first base plate 11 and the second base plate 12 and is fastened by a first nut 32 to couple the first base plate 11 and the second base plate 12. The cross-sectional shapes of the first substrate 11 and the second substrate 12 are both C-shaped, that is, the first substrate 11 and the second substrate 12 are both C-shaped or U-shaped by steel plates according to the outer contour of the original arch rib 200, and the adjusting bracket 30 is arranged on the adjacent side of the first substrate 11 and the second substrate 12, by using the first bolt 21 in the adjusting assembly 20, after the first bolt 21 passes through the first bolt hole 31 on the first substrate 11 and the second substrate 12 and is locked by the first nut 32, the connection of the first substrate 11 and the second substrate 12 can be realized, the temporary fixation of the first substrate 11 and the second substrate is realized, the steel cladding 10 is convenient to be mounted on the original arch rib 200, and the first bolt 21 is matched with the first nut 32, and the gap between the first substrate 11 and the second substrate can be adjusted, so that the steel cladding 10 meets the size design requirement.
The adjusting bracket 30 and the first substrate 11 and the second substrate 12 may be connected in various manners, for example, the adjusting bracket 30 and the first substrate 11 or the second substrate 12 may be connected by bolts or fixed by welding. In this embodiment, the adjusting bracket 30 is fixed to the first substrate 11 or the second substrate 12 by welding.
In some embodiments, referring to fig. 4 to 8, the adjusting assembly 20 further includes second bolts 22, second bolt holes 13 for the second bolts 22 to pass through are correspondingly disposed on each side surface of the first base plate 11 and the second base plate and the adjusting bracket 30, and the number of the second bolts 22 corresponds to the number of the second bolt holes 13; the second bolt 22 is in threaded fit with the second bolt hole 13, and one end of the second bolt 22 on each side surface of the steel sheath 10 can be abutted against the outer wall of the original arch rib 200, so that the distance is adjusted under the rotation action of the second bolt 22 along the axis of the second bolt. Through including a plurality of second bolts 22 in the adjusting part 20, all correspond on each side of first base plate 11 and second base plate 12 and the regulation bracket 30 and be provided with the second bolt hole 13 that supplies second bolt 22 to pass, under the effect of second bolt 22, can adjust each side and the former arch rib 200's of outsourcing steel 10 distance, and then carry out meticulous regulation to the installation space of outsourcing steel 10 for the spatial position of outsourcing steel 10 adjusts conveniently. More importantly, the second bolts 22 in the adjusting assemblies 20 act on the outer steel cladding 10 through rotation of the second bolts 22, pre-arching installation of the outer steel cladding 10 can be achieved, downward back pressure of the outer steel cladding 10 and upward unloading of the original arch ribs 200 are achieved through the adjusting assemblies 20 after the outer steel cladding 10 is folded, the adjusting assemblies 20 are detached after filling materials (concrete) in a filling space of the outer steel cladding 10 reach strength, partial unloading of the original arch ribs 200 undertaken by the concrete in the outer steel cladding 10 is achieved, and the use efficiency of the concrete in the outer steel cladding 10 is improved.
In some embodiments, the first base plate 11 and the second base plate 12 are provided with a second nut 14 on the inner side wall of the second bolt hole 13, and a screw hole of the second nut 14 is communicated with the second bolt hole 13 for the second bolt 22 to pass through and be in threaded fit with. Under the condition that the thicknesses of the first substrate 11 and the second substrate are thin, the thickness of the threaded hole of the second bolt hole 13 in the clad steel 10 is thin, and the second bolt 22 is prone to thread slipping, so that the second nut 14 can be in threaded fit with the second bolt 22 by arranging the second nut 14 on the inner side wall of the second bolt hole 13 on the first substrate 11 and the second substrate 12, even if the second bolt hole 13 on the first substrate 11 and the second substrate 12 is a common connecting hole, the threaded fit relation between the second bolt 22 and the clad steel 10 can be ensured, and under the rotating action of the second bolt 22, the relative position of the clad steel 10 and the original arch rib 200 can be accurately adjusted.
The outer-coated steel 10 can be divided into one or more sections in the longitudinal direction of the arch bridge according to actual conditions, in this example, the outer-coated steel 10 is five sections, and the five outer-coated steels 10 are connected in a combined manner and sleeved on the outer peripheral side of the original arch rib 200 together.
In some embodiments, the number of the clad steels 10 is set to be plural in the arch direction of the original arch rib 200, a plurality of the clad steels 10 are sequentially distributed on the original arch rib 200 along the arch direction of the original arch rib 200, and adjacent two of the clad steels 10 are sequentially connected, and each of the clad steels 10 is provided with the adjusting assembly 20. Because the span of the original arch rib is generally larger, in order to facilitate the hoisting of the steel cladding 10 and reduce the construction difficulty, a plurality of steel cladding 10 are arranged, and the plurality of steel cladding 10 are mutually spliced in the arch direction of the original arch rib 200, so that the installation of the full bridge section of the original arch rib 200 is completed under the splicing action of the plurality of steel cladding 10.
Wherein, pass through welded connection between two adjacent outsourcing steel 10 in the multistage outsourcing steel 10 to guarantee the whole leakproofness between a plurality of outsourcing steel 10, make the filling space intercommunication each other in a plurality of outsourcing steel 10, the filling of the follow-up filling material of being convenient for.
In some embodiments, in the plurality of clad steels 10, the clad steel 10 located at the arch springing position is provided with the grouting hole, and the clad steel 10 located at the arch springing position is provided with the grout outlet hole. Through being equipped with the mud jacking hole on the outsourcing steel 10 that is located arch springing position department, be located vault position department outsourcing steel 10 is equipped with out the thick liquid hole, adopts by lower supreme slip casting promptly, under the antigravity effect, lets the filling material in the filling space extrude from bottom to top to make filling material more solid in the filling space, improved filling material's filling effect.
The filling material can be various, for example, the filling material can be cement paste, grouting material, concrete, and the like. In this embodiment, the filling material is concrete.
In some embodiments, the clad steel 10 is provided with stiffening ribs 50. By providing the stiffening ribs 50 on the steel cladding 10, the stiffening ribs 50 can increase the shear resistance of the steel cladding 10, thereby enhancing the overall stiffness of the steel cladding 10.
The stiffening ribs 50 are rectangular steel plates, and the material and thickness of the stiffening ribs 50 are the same as those of the outer-clad steel 10. The number of the stiffeners 50 is set to plural on the steel sheath 10, and the stiffeners 50 are uniformly welded in the circumferential direction and the longitudinal direction of the steel sheath 10.
In a second aspect, an embodiment of the present application further provides a construction method for a reinforced structure with an enlarged cross section of an arch rib of a steel pipe concrete arch bridge, where the construction method includes the following steps: s1, processing in a factory and pre-assembling; in a factory, the adjusting bracket 30 is arranged on two opposite sides of a first base plate 11 and a second base plate 12 on the outer-coated steel 10, then a first bolt hole 31 is formed in the adjusting bracket 30, second bolt holes 13 are formed in the adjusting bracket 30 and on each side surface of the first base plate 11 and the second base plate on the outer-coated steel 10, and second nuts 14 are arranged on the inner sides of all the second bolt holes 13; s2: hoisting the outer clad steel 10; hoisting the first base plate 11 and the second base plate 12 to the positions to be installed of the original arch ribs 200 through a crane, penetrating the first bolts 21 through the first bolt holes 31 of the adjusting brackets 30 on the outsourcing steel 10, installing the first nuts 32 on the first bolts 21, and screwing the second bolts 22 into the adjusting brackets 30 on the outsourcing steel 10 through the second nuts 14; s3: finely adjusting the section size of the steel 10; checking the outline dimension of the clad steel 10, when the outline dimension of the clad steel 10 does not meet the design requirement, acting on the first bolt 21 or the second bolt 22 to adjust the outline dimension of the clad steel 10 to meet the design requirement, completing the primary fixation of the first substrate 11 and the second substrate 12 on the clad steel 10, and then welding and fixing the first substrate 11 and the second substrate 12; s4: the installation space position of the outer steel cladding 10 is finely adjusted; screwing second bolts 22 into the positions of the second bolt holes 13 on each side surface of the steel ladle 10 until the inner ends of all the second bolts 22 are contacted with the outer wall of the original arch rib 200, measuring the distance between the steel ladle 10 and the original arch rib 200, and adjusting each second bolt 22 until the installation of the steel ladle 10 meets the design requirement; s5: the installation pre-camber setting of the outer steel 10; screwing the pushing screw on the upper side of the clad steel 10 clockwise, and screwing the second bolt 22 on the lower side of the clad steel 10 anticlockwise at the same time so that the clad steel 10 has pre-camber from bottom to top, wherein the pre-camber value is determined according to design calculation; s6: mounting a full bridge; repeating the steps S2 to S5, sequentially and symmetrically installing all outer packages from the arch springing to the vault, and welding and connecting two adjacent sections of the outer package steel 10 in the longitudinal direction of the bridge; s7: unloading the original arch rib 200; for the external steel 10 at the vault position, anticlockwise screwing a pushing screw on the upper side of the external steel 10, and clockwise screwing a pushing screw on the lower side of the external steel 10, so that the external steel 10 at the vault position moves downwards, wherein the specific downward movement value is determined according to design calculation; s8: filling material pressure injection; and pressing filling materials into the grouting holes in the outer-coated steel 10 at the arch springing position, and finishing the pressure injection of the filling materials when the filling materials overflow from the grout outlet holes at the top of the outer-coated steel 10 at the arch crown.
Among the above-mentioned technical scheme, through including outsourcing steel 10 first base plate 11 and second base plate 12, first base plate 11 and second base plate 12 can part, be convenient for outsourcing steel 10 installation cladding in the periphery side of former rib 200, then the position of outsourcing steel 10 for former rib 200 can be adjusted for refining through adjusting the subassembly 20, the accurate control of outsourcing steel 10 in the installation has been realized, reinforced structure's engineering quality has been guaranteed, and adjusting the subassembly 20 can be adjusted the filling space between outsourcing steel 10 and the former rib 200, then utilize the mode of filling portion 60 to be connected outsourcing steel 10 and former rib 200 as an organic whole, and then guaranteed outsourcing steel 10's stability. And can also realize the pre-arching installation of the outsourcing steel 10 through the adjusting component 20, realize the downward back pressure of the outsourcing steel 10 and the upward uninstallation of the original arch rib 200 through the adjusting component 20 after the outsourcing steel 10 is folded, make the adjusting component 20 demolish after the filling material (concrete) in the filling space of the outsourcing steel 10 reaches the intensity, realize that the concrete in the outsourcing steel 10 undertakes the partial uninstallation of the original arch rib 200, has improved the availability factor of the concrete in the outsourcing steel 10, it is obvious to the reinforcement effect of the original arch rib 200.
In step S3, specifically, when the section size of the clad steel 10 is precisely adjusted, the tightening nut may be rotated when the size of the clad steel 10 is greater than a design value; when the size of the steel ladle 10 is smaller than a design value, the pushing screw rod can be rotated, so that the contour size of the steel ladle 10 meets the design requirement. In addition, in step S4, when the installation of each second bolt 22 is adjusted until the installation of the outsourcing steel 10 meets the design requirement, specifically, a steel ruler may be used to measure the distance between the outsourcing steel 10 and the original arch rib 200, when the distance between the outsourcing steel 10 and the original arch rib 200 is smaller than the design value, the head of the second bolt 22 on the upper side of the outsourcing steel 10 is screwed clockwise and the head of the second bolt 22 on the lower side of the outsourcing steel 10 is screwed counterclockwise, and when the distance between the outsourcing steel 10 and the original arch rib 200 is larger than the design value, the head of the second bolt 22 on the upper side of the outsourcing steel 10 is screwed counterclockwise and the head of the second bolt 22 on the lower side of the outsourcing steel 10 is screwed clockwise until the vertical spatial position of the outsourcing steel 10 is finely adjusted to meet the design requirement. In the same way, the transverse spatial position of the steel ladle 10 is finely adjusted.
In some embodiments, in step S3, after the welding connection of the first substrate 11 and the second substrate 12 is completed, the adjusting bracket 30 on the outer clad steel 10 and the first bolt 21 and the second bolt 22 on the adjusting bracket 30 are removed. The adjusting bracket 30 and the first bolt 21 and the second bolt 22 on the adjusting bracket 30 have the functions of mainly adjusting the relative positions of the first substrate 11 and the second substrate, so that the outer clad plate meets the design requirements, after the welding of the first substrate 11 and the second substrate 12 is completed, the first substrate 11 and the second substrate are connected into a whole, which is equivalent to that the size of the outer clad steel 10 is fixed, therefore, the adjusting bracket 30 and the first bolt 21 and the second bolt 22 on the adjusting bracket 30 can be disassembled, the fine adjustment of the installation space position of the outer clad steel 10 in the subsequent step S4 is facilitated, the second bolt 22 on the outer clad steel 10 cannot be dried by the adjusting bracket 30 after being disassembled, and the fine adjustment of the installation space position of the outer clad steel 10 in the step S4 is facilitated.
In some embodiments, in step S8, all the second bolts 22 on the overclad steel 10 are removed after the strength of the filling material meets the design requirement, and the second bolt holes 13 on all the overclad steel 10 are subjected to hole sealing treatment. And after the strength of the filling material meets the design requirement, all the second bolts 22 on the outer steel ladle 10 are detached, and the hole sealing treatment is carried out on the second bolt holes 13 on all the outer steel ladle 10, so that the integrity of the outer steel ladle 10 is better.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. The utility model provides a reinforced structure of steel pipe concrete arch bridge arch rib increase cross-section for consolidate former arch rib, to its characterized in that, include:
the outer steel cladding comprises a first base plate and a second base plate, the first base plate and the second base plate are mutually connected in a surrounding mode, so that the outer steel cladding can be sleeved on the outer peripheral side of the original arch rib, a space is reserved between the inner wall of the outer steel cladding and the outer wall of the original arch rib, and a filling space is formed between the outer steel cladding and the original arch rib;
the filling part is filled in the filling space and is used for connecting the outer steel wrap and the original arch rib into a whole;
the outer steel is provided with an adjusting assembly, and the adjusting assembly is used for adjusting the relative position of the outer steel and the original arch rib.
2. A reinforced structure with an enlarged cross section of a rib of a concrete filled steel tube arch bridge as recited in claim 1, wherein the first base plate and the second base plate each have a C-shaped cross section, and an adjustment bracket is provided on each of the first base plate and the second base plate at an adjacent side thereof, and a first bolt hole is provided on the adjustment bracket;
the adjusting assembly comprises a first bolt which passes through the first bolt holes on the first base plate and the second base plate and is locked by a first nut so as to connect the first base plate and the second base plate.
3. A concrete filled steel tube arch bridge rib increased-section reinforcing structure as recited in claim 2, wherein said adjusting means further comprises second bolts, second bolt holes for passing said second bolts are correspondingly provided on each side of said first base plate and said second base plate and on said adjusting bracket, and the number of said second bolts corresponds to the number of said second bolt holes one-to-one; the second bolt is in threaded fit with the second bolt hole, and one end of each second bolt on each side face of the outer clad steel can be tightly abutted against the outer wall of the original arch rib, so that the size of the distance is adjusted under the rotating action of the second bolt along the axis of the second bolt.
4. A reinforced structure with an enlarged cross section for a rib of a concrete filled steel tube arch bridge as recited in claim 3, wherein said first base plate and said second base plate are each provided with a second nut on an inner side wall of said second bolt hole, and a screw hole of said second nut is communicated with said second bolt hole for said second bolt to pass through and be screw-engaged therewith.
5. A reinforced structure with an enlarged cross section of a steel pipe concrete arch bridge arch rib according to claim 1, wherein the number of the clad steels is set to be plural in the arch direction of the original arch rib, the plural clad steels are sequentially distributed on the original arch rib along the arch direction of the original arch rib, and adjacent two of the clad steels are sequentially connected to each other, and each of the clad steels is provided with the adjusting component.
6. A reinforced structure with an increased cross-section of a rib for a steel pipe concrete arch bridge according to claim 5, wherein among the plurality of the outer steels, the outer steel at the position of the arch springing is provided with a grout outlet, and the outer steel at the position of the arch crown is provided with a grout outlet.
7. A steel pipe concrete arch bridge rib increased section reinforcing structure according to claim 1, wherein a stiffening rib is provided on the outer clad steel.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115142362A (en) * | 2022-08-16 | 2022-10-04 | 浙江交工高等级公路养护有限公司 | Reinforced structure for increasing cross section of arch rib of concrete-filled steel tube arch bridge and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115142362A (en) * | 2022-08-16 | 2022-10-04 | 浙江交工高等级公路养护有限公司 | Reinforced structure for increasing cross section of arch rib of concrete-filled steel tube arch bridge and construction method |
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