CN113062199B - Construction method for anti-corrosion concrete outer cladding layer of wading section of arched beam - Google Patents
Construction method for anti-corrosion concrete outer cladding layer of wading section of arched beam Download PDFInfo
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- CN113062199B CN113062199B CN202110387642.1A CN202110387642A CN113062199B CN 113062199 B CN113062199 B CN 113062199B CN 202110387642 A CN202110387642 A CN 202110387642A CN 113062199 B CN113062199 B CN 113062199B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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- E01D4/00—Arch-type 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/64—Insulation or other protection; Elements or use of specified material therefor for making damp-proof; Protection against corrosion
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Abstract
The application discloses a construction method of an anti-corrosion concrete outer cladding layer of an arch beam wading section, wherein the arch beam wading section comprises an arch foot section and an arch rib section, and the construction method further comprises the following steps: s1, prefabricating an outer concrete cladding of the arch rib section: s11, bundling and fixing the reinforcing mesh outside the arch rib section; s12, installing a template for pouring outside the reinforcing mesh; s13, pouring the stirred concrete into the template; s14, after the concrete is solidified, the template is removed; s2, constructing an arch springing section concrete outer wrapping layer: s21, bundling and fixing the reinforcing mesh outside the arch springing; s22, installing a template for pouring outside the reinforcing mesh; s3, integrally connecting and constructing the wading section of the arched girder; the outer side of the wading section of the arched beam is fixedly provided with a plurality of studs arranged at intervals, the studs can be bent under the action of external force, the studs are embedded in the concrete outer cladding, and the outer side of the wading section of the arched beam is provided with a coating for preventing the concrete outer cladding from being bonded with the wading section of the arched beam. The application has the effect of improving the stability of the concrete surround.
Description
Technical Field
The application relates to the technical field of anticorrosion treatment of arched girders, in particular to a construction method of an anticorrosion concrete outer cladding layer at an wading section of an arched girder.
Background
The beam-arch combined bridge is one of large-scale manned landscape bridges, fully exerts the advantages of two bridge types and realizes the perfect combination of the arch bridge and the beam bridge. The related art bridge-arch composite bridge generally includes a pile foundation, a main girder, an arched girder, a stay cable, and the like.
Because different bridge designs, in some bridge, the arched girder includes the fixed steel box girder of multistage interconnect, and the both ends of arched girder part are stretched into in aqueous and are fixed with the cushion cap basis, and wherein, the part that the arched girder stretched into in aqueous is arched girder wading section. In order to slow down the corrosion speed of the wading section of the arched girder, a concrete layer is coated outside the wading section of the arched girder.
With respect to the above-described related art, the inventors consider that the following problems exist: when the arched girder bears a force, the arched girder wading section is easy to deform under the action of an external force, when the arched girder wading section is stressed and deformed, because the plasticity of concrete is lower than that of a steel box girder, a concrete layer is easy to break or break when the arched girder wading section is deformed, corrosion resistance of the arched girder wading section is not facilitated, and the service life of the arched girder wading section is short.
Disclosure of Invention
In order to prolong the service life of the wading section of the arched beam, the application provides a construction method of an anti-corrosion concrete outer cladding layer of the wading section of the arched beam.
The application provides a construction method of an anti-corrosion concrete outer cladding layer of an arch beam wading section, which adopts the following technical scheme:
a construction method of an anti-corrosion concrete outer cladding layer of an arched beam wading section comprises the following steps:
s1, prefabricating an outer concrete wrapping layer of the arch rib section:
s11, bundling the reinforcing mesh and fixing the reinforcing mesh on the outer side of the arch rib section;
s12, installing a template for pouring outside the reinforcing mesh;
s13, pouring the stirred concrete into the template;
s14, after the concrete is solidified, the template is removed;
s2, construction of an arch springing section concrete outer cladding:
s21, bundling and fixing the reinforcing mesh outside the arch springing;
s22, installing a template for pouring outside the reinforcing mesh;
s23, pouring the stirred concrete into the template;
s24, after the concrete is solidified, the template is removed;
s3, integrally connecting and constructing the wading section of the arched girder:
s31, connecting the arch rib section with the arch springing section, and connecting the concrete outer cladding between the arch rib section and the arch springing section;
the outer side of the wading section of the arched beam is fixedly provided with a plurality of studs arranged at intervals, the studs can be bent under the action of external force, the studs are embedded in the concrete outer cladding, and a coating used for preventing the concrete outer cladding from being bonded with the wading section of the arched beam is arranged on the outer side of the wading section of the arched beam.
By adopting the technical scheme, when a bridge bears force, the arched beam is radially tensioned to deform, and because the plasticity of the steel box beam is larger than that of the concrete outer cladding layer, the restorable displacement of the steel box beam is larger than that of the concrete outer cladding layer under the same stress, and therefore if the steel box beam and the concrete outer cladding layer deform in the same amount, the concrete outer cladding layer is easy to collapse. The setting of coating has blocked the concrete surrounding layer and has involved the connection between the outer peripheral face of section of wading with the arched beam, and be connected through the peg between arched beam and the concrete surrounding layer, consequently when arched beam atress length of elongation, the peg atress deformation, the displacement volume of concrete surrounding layer has been cushioned, consequently, the deformation of concrete surrounding layer has been reduced, and then the condition that the concrete surrounding layer collapses garrulously has been reduced, be favorable to the arched beam to wade the anticorrosive of section, the life of the arched beam section of wading has been prolonged.
Preferably, in step S31, the concrete cladding between the rib section and the arch foot section is connected by a wet joint construction.
Through adopting above-mentioned technical scheme, for dry seam, wet seam can compensate the tiny defect of festival section faying face, and the leakproofness is good, and can bear certain pulling force, and joint strength is higher.
Preferably, a plurality of stiffening ribs are fixedly arranged at the bottom end of the arch leg section, and in step S22, formwork installation is performed on a portion of the arch leg section located between adjacent stiffening ribs, and then formwork installation is performed on the remaining portion of the arch leg section.
By adopting the technical scheme, the construction method has reasonable construction sequence and improves the construction efficiency.
Preferably, a steel pipe formwork supporting system for supporting the formwork is arranged below the formwork on the arch springing section.
Through adopting above-mentioned technical scheme, the setting of template braced system has played the supporting role to the template on the hunch foot section, has increased the stability of template, has reduced the appearance of the not hard up condition of template at the in-process of pouring.
Preferably, a stepped support underframe for supporting the steel pipe formwork support system is arranged below the steel pipe formwork support system.
Through adopting above-mentioned technical scheme, the setting up of notch cuttype support chassis is convenient for constructor steadily to set up rigid pipe template braced system, prevents steel pipe template braced system displacement unstability.
Preferably, a curing step for curing the concrete outer cladding is further included between the step S14 and the step S2.
By adopting the technical scheme, the curing step is used for curing the concrete outer cladding, so that the compactness, high strength and high toughness of the concrete outer cladding are improved.
Preferably, the coating is provided as a polyurethane waterproof coating.
Through adopting above-mentioned technical scheme, setting up of polyurethane waterproof coating has realized waterproof and blocking between the outer peripheral face of concrete surrounding layer and arched beam wading section.
Preferably, a plurality of upper connecting ribs and lower connecting ribs are embedded in two opposite ends of the rib section and the leg section respectively, and a reinforcing connecting piece for connecting the upper connecting ribs and the lower connecting ribs is arranged between the upper connecting ribs and the lower connecting ribs.
Through adopting above-mentioned technical scheme, in traditional wet joint construction, usually with pre-buried reinforcement or welding in two sections, the setting up of reinforcement and connection between the splice bar and the lower splice bar has been realized, the construction of being convenient for.
Preferably, the reinforcing connecting piece comprises a connecting rod and screw sleeves which are in threaded connection with two ends of the connecting rod, and two ends of each screw sleeve, which are back to back, are in threaded connection with the upper connecting rib and the lower connecting rib respectively.
Through adopting above-mentioned technical scheme, arrange the reinforced connection spare in earlier between the last splice bar that corresponds each other and the splice bar down, rotate two swivel nuts respectively, make two both ends that the swivel nuts carried on the back mutually be threaded connection respectively in last splice bar and splice bar down, realize going up the splice bar and connecting down between the splice bar, the construction of being convenient for has improved the efficiency of construction.
Preferably, the connecting rod includes the regulating part and sets up in the removal quarter butt at regulating part both ends, remove the quarter butt and can remove along the length direction of perpendicular to removal quarter butt for the regulating part, be provided with on the removal quarter butt and be used for locking its retaining member on the regulating part, two remove both ends that the quarter butt carried on the back mutually respectively with two swivel nut threaded connection.
Through adopting above-mentioned technical scheme, the arch rib section installation is fixed in on the hunch foot section back, if go up the splice bar or the splice bar is when pre-buried down in the appearance, goes up the condition of splice bar and lower splice bar axis misalignment, adjusts the relative position of two removal quarter butts to adjust the relative position of two swivel nuts, make two swivel nuts respectively with last splice bar with down the splice bar aim at the connection.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the bridge bears the force, the arched beam is radially tensioned to deform, and because the plasticity of the steel box beam is larger than that of the concrete outer cladding layer, the restorable displacement of the steel box beam is larger than that of the concrete outer cladding layer under the same stress, and therefore if the steel box beam and the concrete outer cladding layer deform in the same amount, the concrete outer cladding layer is easy to collapse. The coating blocks the connection between the outer peripheral surfaces of the concrete outer cladding layer and the wading section of the arched beam, and the arched beam is connected with the concrete outer cladding layer through the studs, so that when the arched beam is stressed and elongated, the studs deform under stress, and the displacement of the concrete outer cladding layer is buffered, so that the deformation of the concrete outer cladding layer is reduced, the collapse and breakage of the concrete outer cladding layer are reduced, the corrosion prevention of the wading section of the arched beam is facilitated, and the service life of the wading section of the arched beam is prolonged;
2. compared with a dry joint, the wet joint can make up for the tiny defects of the joint surfaces of the segments, has good sealing performance, can bear certain tensile force, and has higher connection strength;
3. the arrangement of the polyurethane waterproof coating realizes the waterproof and blocking between the concrete outer cladding and the outer peripheral surface of the wading section of the arched beam.
Drawings
Fig. 1 is a schematic structural diagram showing the structure of the wading section of the arched girder in the first embodiment.
FIG. 2 is a schematic sectional view showing the overall structure in the first embodiment.
Fig. 3 is a partial structural view showing the structure of upper and lower connecting bars at a wet joint according to the first embodiment.
Fig. 4 is a schematic plan view showing the structure of the ladder type support chassis and the steel pipe formwork support system in the first embodiment.
Fig. 5 is a partial structural view showing the structure of the upper tie bar, the lower tie bar, the reinforcing connecting member, and the annular bar in the second embodiment.
Fig. 6 is a partially enlarged schematic view of a portion a in fig. 5.
Fig. 7 is a partial structural view showing the structure of the upper and lower tie bars and the reinforcing connecting member in the second embodiment.
Description of reference numerals: 1. a leg segment; 11. an arch foot foundation slope; 111. a stepped support chassis; 112. a steel pipe formwork support system; 12. a stiffening rib; 2. a rib segment; 3. a stud; 4. a main beam; 5. connecting steel bars; 6. lower connecting steel bars; 7. an UHPC concrete outer cladding; 81. upper connecting ribs; 82. a lower connecting rib; 9. reinforcing the connecting piece; 91. a connecting rod; 911. an adjusting block; 9111. a sliding groove; 912. moving the short rod; 9121. a sliding block; 9122. locking the nut; 9123. a gasket; 92. a threaded sleeve; 10. and (5) annular ribs.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
Example one
Referring to fig. 1, the construction method of the anticorrosion concrete outer cladding layer of the wading section of the arched beam is used for carrying out the outer cladding construction of the anticorrosion concrete on the wading section of the arched beam. The arched girder wading section comprises an arched foot section 1 and an arched rib section 2, and the arched foot section 1 and the arched rib section 2 are both of steel box girder structures. One end of the arch foot section 1 back to the arch rib section 2 is supported and fixed on an arch foot foundation slope surface 11 which is obliquely arranged, and one end of the arch foot section 1 close to the arch foot foundation slope surface 11 is provided with a plurality of stiffening ribs 12. The outer surfaces of the parts of the arch rib section 2 and the arch springing section 1 which are higher than the arch springing foundation slope 11 are both welded with a plurality of studs 3 which are uniformly distributed at intervals, and the outer surfaces of the parts of the arch rib section 2 and the arch springing section 1 which are higher than the arch springing foundation slope 11 are both coated with polyurethane waterproof paint.
A construction method of an anti-corrosion concrete outer cladding layer of an arch beam wading section comprises the following steps:
s1, prefabricating a concrete outer cladding layer of the arch rib section 2;
the arch rib section 2 is processed in a structure factory, and the step of performing anti-corrosion concrete external coating prefabrication on the arch rib section 2 comprises the following steps:
s11, mounting a reinforcing mesh;
in order to ensure that the steel bars are stably arranged, a plurality of steel bars are fixed on the outer side of the arch rib section 2 at intervals before the steel bar mesh is installed to be used as a bedding, and then the steel bar mesh is bound on the outer side of the arch rib section 2, so that the steel bar mesh covers the outer peripheral surface of the arch rib section 2 in a surrounding mode. Reasonably controlling the spacing of the steel bars according to the spacing of the studs 3 in the binding process, so that the end parts of the studs 3 extend into the gaps of the steel bar mesh;
s12, installing a template;
the template comprises a bottom die, two side dies, a top die and two end head dies, wherein the upper surface of any top die section is symmetrically provided with two feeding ports relative to the central line of the top die section;
s121, determining the installation position: referring to fig. 2, a main beam 4 is arranged above an arch rib section 2, a top end mounting line of a template is parallel to the main beam 4 and is spaced from the main beam 4, a bottom end mounting line of the template is parallel to a boundary between an arch foot section 1 and the arch rib section 2, and a wet joint for connecting the arch foot section 1 and the arch rib section 2 is reserved between the bottom end mounting line of the template and the boundary between the arch foot section 1 and the arch rib section 2;
s122, cushion block installation: a buttress used for supporting the arch rib section 2 is arranged in the construction site, a UHPC cushion block is firstly installed on the buttress, and then the arch rib section 2 is horizontally placed on the UHPC cushion block;
s123, bottom die installation: positioning the assembled bottom die at the lower part of the arch rib section 2;
s124, side die installation: the two assembled side molds are respectively fixed on two sides of the bottom mold through screw connection;
s125, installing a top die: the assembled top die is fixed on the two side dies through screw connection;
s126, welding the upper connecting steel bars 5: referring to fig. 3, an upper connecting steel bar 5 arranged in a U shape is welded to one end of the steel bar net close to the arch leg section 1;
s127, installing an end die: fixedly connecting the assembled end head die with a bottom die, a side die and a top die through screws, and ensuring that slurry leakage does not occur at the connecting positions of the end head die and the bottom die as well as the side die and the top die;
s13, stirring and producing concrete;
producing UHPC concrete materials through stirring in a stirring station, and pouring the materials into the installed template;
s14, pouring concrete;
before pouring, a plurality of vibrators are required to be installed on the outer peripheral surface of the template, the UHPC concrete material which is stirred is poured into the template, and during pouring, the feeding mode is that multipoint feeding is carried out through a plurality of feeding ports on the top die. And opening the vibrator during the whole vibrating process during the blanking process, and closing the vibrator after the pouring process is finished. In the pouring process, agglomerated steel fibers are timely picked out and centralized for treatment, and the steel fibers blocked by the reinforcing steel bars need to be timely cleaned, so that the flowability and the combination form of concrete are prevented from being influenced, the surface of the concrete is disturbed if necessary, and the interlayer connection effect is ensured;
s15, removing the template;
dismantling the template by matching with a truck crane, loosening the template by using a jack before dismantling to prevent the rib section 2 and the template from being damaged, and forming a UHPC concrete outer cladding layer 7 outside the polyurethane waterproof coating layer on the outer side of the rib section 2 after dismantling the template;
s16, curing the concrete;
and after the template is dismantled, immediately spraying a curing agent and paving a moisturizing film, wherein the moisturizing film and the surface of the UHPC concrete outer cladding layer 7 are densely paved as much as possible without bubbles. After the UPHC concrete outer cladding layer is finally set, steam curing is carried out on the UPHC concrete outer cladding layer through a steam shed, so that the compactness, high strength and high toughness of the UHPC concrete outer cladding layer 7 are improved;
s17, outer coating;
after steaming, 108 glue and putty powder are used for decorating bubble cavities on the appearance, and then the UHPC concrete outer cladding layer 7 is coated by medium-ash paint and Tianna water.
S2, constructing a concrete outer cladding of the arch springing section 1;
after the arch foot section 1 is hoisted and fixed on the arch foot foundation slope 11, the arch foot section 1 is constructed in each procedure on a construction site, and the step of carrying out the anticorrosion concrete outer coating construction on the arch foot section 1 comprises the following steps:
s21, installing a reinforcement cage;
s22, installing a template;
s221, determining the installation position:
the top mounting line of the template is parallel to the boundary between the arch foot section 1 and the arch rib section 2, and a wet joint for connecting the arch foot section 1 and the arch rib section 2 is reserved between the top mounting line of the template and the boundary between the arch foot section 1 and the arch rib section 2;
and S222, installing the formwork of the stiffening rib 12 part of the arch leg section 1, wherein the formwork height of the part is higher than that of the stiffening rib 12. The straight line sections of the stiffening ribs 12 of the arch leg section 1 are fixed between two ribs by adopting a wood template, and the curve sections are sequentially connected by adopting a plurality of wood templates with smaller widths to control the curve lines and are then fixed between two adjacent stiffening ribs 12;
the formwork of the remaining portion of the arch leg segment 1 is installed in the same manner as the formwork of the rib segment 2, and will not be described again. Referring to fig. 4, a stepped support chassis 111 is formed on an inclined plane outside the arch foot base slope 11, and the stepped support chassis 111 includes a plurality of section steels fixedly connected in sequence. Steadily set up steel pipe template braced system 112 on notch cuttype supports chassis 111, steel pipe template braced system 112 is used for supporting the template, and steel pipe template braced system 112 includes the vertical pole setting that a plurality of intervals set up and is the horizontal pole setting of cross setting with vertical pole setting, and steel pipe template braced system 112 is still including being the down tube of cross setting, increases the stability of support. The top end and the bottom end of the longitudinal vertical rod are used for adjusting the template through the top support and the bottom support respectively.
Referring to fig. 3, before the end molds of the formwork are installed, the end of the reinforcing mesh near the rib section 2 is welded with the lower connecting steel bars 6 arranged in a U shape, and the lower connecting steel bars 6 correspond to the upper connecting steel bars 5 one by one;
s23, pouring concrete;
s24, removing the template;
s25, curing the concrete;
s26, outer coating;
the steps of reinforcing mesh installation, concrete pouring, formwork removal, concrete curing and outer layer coating are the same as the corresponding steps in the arch rib section 2, and are not described again.
S3, integrally connecting and constructing the wading section of the arched girder;
s31, installing the template for the wet joint construction at the wet joint;
s32, welding and fixing the upper connecting steel bars 5 and the lower connecting steel bars 6 which are corresponding in position through the prefabricated reinforcing steel bars, and then welding and fixing the circumferential steel bars;
s33, pouring concrete;
s34, removing the template;
s35, curing the concrete;
s36, outer coating;
the height of the stud 3 of the stiffening rib 12 part positioned on the arch leg section 1 is higher than that of the stud 3 of the rest part, the end part of the stud 3 of the stiffening rib 12 part positioned on the arch leg section 1 extends out of the UHPC concrete outer cladding 7, and the end part of the stud 3 of the rest part is positioned inside the UHPC concrete outer cladding 7.
The implementation principle of the construction method of the anti-corrosion concrete outer cladding layer of the wading section of the arched beam in the embodiment of the application is as follows:
when the bridge bears the force, the arched beam is tensioned along the radial direction to deform, because the plasticity of the steel box beam is larger than that of the concrete outer cladding layer, the recoverable displacement of the steel box beam is larger than that of the concrete outer cladding layer under the same stress, and therefore if the steel box beam and the concrete outer cladding layer deform in the same amount at the same time, the UHPC concrete outer cladding layer 7 is easy to collapse. The polyurethane waterproof coating is arranged to block connection between the outer peripheral surfaces of the UHPC concrete outer cladding layer 7 and the arch beam wading section, the arch beam wading section is connected with the UHPC concrete outer cladding layer 7 through the studs 3, when the arch beam is stressed to stretch, the studs 3 deform under stress, the displacement of the UHPC concrete outer cladding layer 7 is buffered, the deformation of the UHPC concrete outer cladding layer 7 is reduced, the breakage of the UHPC concrete outer cladding layer 7 is reduced, the corrosion prevention of the arch beam wading section is facilitated, and the service life of the arch beam wading section is prolonged.
Example two
With reference to fig. 5, 6 and 7, a construction method of an anti-corrosion concrete outer cladding layer for an arch beam wading section is different from the first embodiment in that a plurality of upper connecting ribs 81 and lower connecting ribs 82 are reserved at two opposite ends of an arch rib section 2 and an arch foot section 1 respectively, the upper connecting ribs 81 and the lower connecting ribs 82 are both long, two opposite ends of the upper connecting ribs 81 and the lower connecting ribs 82 are both flat sections, and the flat sections of the two opposite ends of the upper connecting ribs 81 and the lower connecting ribs 82 are respectively provided with external threads.
A reinforcing connecting piece 9 for connecting the two is arranged between the two opposite ends of the lower connecting rib 82 and the upper connecting rib 81. The reinforcing connecting piece 9 comprises a connecting rod 91, the outer sides of the two ends of the connecting rod 91 are respectively sleeved with screw sleeves 92 in threaded connection with the connecting rod 91, and the two ends of the two screw sleeves 92, which are opposite to each other, are respectively in threaded connection with the straight sections of the upper connecting rib 81 and the lower connecting rib 82.
The connecting rod 91 comprises an adjusting block 911 in the middle and two moving short rods 912 respectively arranged at two ends of the adjusting block 911, and two ends of the two moving short rods 912, which are opposite to each other, are respectively in threaded connection with the two thread sleeves 92. The adjusting block 911 is provided with a sliding groove 9111 corresponding to the moving short rod 912, the sliding groove 9111 is oblong, the cross section of the sliding groove 9111 is T-shaped, and two opposite ends of the two sliding grooves 9111 are communicated with each other. One end of the movable short rod 912 is fixed with a sliding block 9121 matched with the sliding groove 9111, and the sliding block 9121 is connected in the sliding groove 9111 in a sliding manner. Remove quarter butt 912 and be close to the one end threaded connection of sliding block 9121 and be used for compressing tightly lock nut 9122 on regulating block 911 with it, the outside cover that removes quarter butt 912 is equipped with gasket 9123, screws up lock nut 9122, compresses tightly gasket 9123 on regulating block 911, has increased the stability when removing quarter butt 912 and locking.
After arch rib section 2 installation is fixed in on the arch foot section 1, if the circumstances of connecting rib 81 or lower connecting rib 82 axis misalignment when pre-buried appear, adjust two relative positions that remove quarter butt 912, rethread lock nut 9122 will remove quarter butt 912 and lock on regulating block 911 to adjust two swivel nuts 92's relative position, make two swivel nuts 92 align with last connecting rib 81 and lower connecting rib 82 respectively and be connected.
The outer sides of the connecting rods 91 are fixedly wound with annular ribs 10, and the annular ribs 10 are arranged at intervals along the axial direction of the wading section of the arched beam.
The implementation principle of the above embodiment is as follows:
arrange reinforcement connection 9 in between the last splice bar 81 that corresponds each other and lower splice bar 82 earlier, adjust two relative positions that remove quarter butt 912, make two swivel nuts 92 aim at with last splice bar 81 and the relative both ends of splice bar 82 down respectively, rethread lock nut 9122 will remove quarter butt 912 and lock on regulating block 911, rotate two swivel nuts 92 respectively, the both ends that make two swivel nuts 92 carry on the back mutually are threaded connection in last splice bar 81 and lower splice bar 82 respectively, realize going up the splice bar 81 and connecting between the splice bar 82 down, construction convenience is carried out, and construction efficiency is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A construction method of an anti-corrosion concrete outer cladding layer of an arch beam wading section is characterized by comprising the following steps: the arched girder wading section comprises an arched foot section (1) and an arched rib section (2), and further comprises the following steps:
s1, prefabricating a concrete outer cladding layer of the arch rib section (2):
s11, bundling and fixing the reinforcing mesh outside the rib section (2);
s12, installing a template for pouring outside the reinforcing mesh;
s13, pouring the stirred concrete into the template;
s14, after the concrete is solidified, the template is removed;
s2, constructing a concrete outer cladding layer of the arch leg section (1):
s21, bundling and fixing the reinforcing mesh outside the arch leg section (1);
s22, installing a template for pouring outside the reinforcing mesh;
s23, pouring the stirred concrete into the template;
s24, after the concrete is solidified, the template is removed;
s3, integrally connecting and constructing the wading section of the arched girder:
s31, connecting the arch rib section (2) with the arch springing section (1), and connecting the concrete outer cladding between the arch rib section (2) and the arch springing section (1);
the outer side of the wading section of the arched beam is fixedly provided with a plurality of studs (3) arranged at intervals, the studs (3) can be bent under the action of external force, the studs (3) are embedded in the concrete outer cladding, and the outer side of the wading section of the arched beam is provided with a coating for preventing the concrete outer cladding from being bonded with the wading section of the arched beam.
2. The method for constructing the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 1, wherein the method comprises the following steps: in step S31, the connection construction method of the concrete cladding between the rib section (2) and the arch foot section (1) is wet joint construction.
3. The construction method of the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 1, wherein: the bottom end of each arch leg section (1) is fixedly provided with a plurality of stiffening ribs (12), in the step S22, the part, located between the adjacent stiffening ribs (12), of each arch leg section (1) is firstly subjected to template installation, and then the rest part of each arch leg section (1) is subjected to template installation.
4. The method for constructing the anti-corrosion concrete outer cladding layer on the wading section of the arched beam according to claim 3, wherein the method comprises the following steps: and a steel pipe template supporting system (112) for supporting the arch leg section (1) is arranged below the template.
5. The method for constructing the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 4, wherein the method comprises the following steps: and a step-shaped supporting underframe (111) for supporting the steel tube formwork is arranged below the steel tube formwork supporting system (112).
6. The method for constructing the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 1, wherein the method comprises the following steps: and a curing step for curing the concrete outer cladding is also included between the step S14 and the step S2.
7. The method for constructing the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 1, wherein the method comprises the following steps: the coating is a polyurethane waterproof coating.
8. The method for constructing the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 2, wherein the method comprises the following steps: the two opposite ends of the arch rib section (2) and the arch foot section (1) are respectively embedded with a plurality of upper connecting ribs (81) and lower connecting ribs (82), and reinforcing connecting pieces (9) used for connecting the upper connecting ribs (81) and the lower connecting ribs (82) are arranged between the upper connecting ribs (81) and the lower connecting ribs (82).
9. The method for constructing the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 8, wherein: the reinforcing connecting piece (9) comprises a connecting rod (91) and screw sleeves (92) which are in threaded connection with the two ends of the connecting rod (91), and the two ends, back to back, of the screw sleeves (92) are in threaded connection with the upper connecting rib (81) and the lower connecting rib (82) respectively.
10. The method for constructing the anti-corrosion concrete outer cladding layer of the wading section of the arched beam as claimed in claim 9, wherein: connecting rod (91) include the regulating part and set up in removal quarter butt (912) at regulating part both ends, remove quarter butt (912) and can remove along the length direction of perpendicular to removal quarter butt (912) for the regulating part, be provided with on removing quarter butt (912) and be used for locking its retaining member on the regulating part, two remove both ends that quarter butt (912) carried on the back mutually respectively with two swivel nuts (92) threaded connection.
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Effective date of registration: 20230609 Address after: 511458 Building 1, 582 Jingang Avenue, Nansha District, Guangzhou City, Guangdong Province Patentee after: CHINA RAILWAY GUANGZHOU ENGINEERING GROUP Co.,Ltd. Patentee after: CHINA RAILWAY GUANGZHOU ENGINEERING GROUP SECOND ENGINEERING Co.,Ltd. Patentee after: China Railway Guangzhou Engineering Bureau Group Testing Center Co.,Ltd. Address before: 511458 Building 1, 582 Jingang Avenue, Nansha District, Guangzhou City, Guangdong Province Patentee before: CHINA RAILWAY GUANGZHOU ENGINEERING GROUP Co.,Ltd. Patentee before: CHINA RAILWAY GUANGZHOU ENGINEERING GROUP SECOND ENGINEERING Co.,Ltd. |