CN115058985B - Steel-concrete composite structure for emergency repair of bridge and emergency repair method - Google Patents
Steel-concrete composite structure for emergency repair of bridge and emergency repair method Download PDFInfo
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- CN115058985B CN115058985B CN202210768782.8A CN202210768782A CN115058985B CN 115058985 B CN115058985 B CN 115058985B CN 202210768782 A CN202210768782 A CN 202210768782A CN 115058985 B CN115058985 B CN 115058985B
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention discloses a steel-concrete composite structure for emergency repair of a bridge, which comprises a plurality of steel beams and a plurality of bridge deck plate assemblies, wherein the steel beams are erected on two adjacent cover beams in parallel, the bridge deck plate assemblies are arranged on the steel beams, each bridge deck plate assembly comprises a groove-shaped perforated steel plate fixed on the steel beam and a concrete bridge deck plate arranged in the groove-shaped perforated steel plate, the structure is quickly connected with the bridge deck plate assemblies by utilizing I-shaped steel sections, a stable and sustainable emergency repair beam plate structure is conveniently formed between the two adjacent cover beams, and the steel-concrete composite structure is high in bearing capacity, high in construction precision, light in self weight and convenient to transport and store. Meanwhile, the invention discloses an emergency repair method, which comprises the following steps: 1. formulating an emergency repair scheme; 2. splicing and erecting steel beams; 3. the bridge deck plate assembly is laid on the steel beam, all members in the method only need to be welded and connected through bolts, prefabricated members in the steel-concrete composite structure are spliced into emergency repair beam plate structures with different lengths and different widths, and emergency repair of the bridge is achieved.
Description
Technical Field
The invention belongs to the technical field of emergency bridge construction, and particularly relates to a steel-concrete composite structure for emergency repair of a bridge and an emergency repair method.
Background
The bridge guarantees the unblocked throat of highway, its bearing capacity and trafficability are the key of communicating the whole line more, but highway bridge damages under earthquake, flood, mud-rock flow, landslide, falling rocks and striking etc. very easily, when the bridge construction is not enough because of receiving the effect of damage, need take emergent first-aid repair measure, so that resume the road current, guarantee goods and materials supply and rescue progress, and how to realize quick, convenient change or salvage bridge superstructure, just become a problem of treating urgent solution.
At present, emergency repair bridges are mainly divided into two types, namely an assembly type highway steel bridge and a mechanical bridge, wherein the assembly type highway steel bridge is a semi-permanent bridge and has the obvious defects of large structure self weight, high difficulty in erecting complex environments and the like; the mechanized bridge is a temporary bridge and has the defects of high manufacturing cost, small span, difficult long-term traffic use and the like; the steel-concrete combined bridge composed of the steel beam and the concrete bridge deck is better suitable for rush repair and replacement of the upper structure of the bridge due to the advantages of strong adaptability, high bearing capacity, suitability for long-term traffic use and the like.
In traditional steel-concrete composite structure, concentrated groove can be reserved between girder steel and the precast concrete decking, pass through the weld nail again, the trompil board, shaped steel and cast-in-place concrete are connected as whole, need ligature joint reinforcing bar between the precast concrete decking, then pour vertical and horizontal wet joint concrete, make form whole between the precast concrete decking, because of the girder steel all needs cast-in-place concrete with the connection between precast concrete decking and the connection between the precast concrete decking, lead to construction speed slow, satisfy the ageing demand of emergency repair engineering, be applied to highway bridge emergency repair engineering less, therefore, need a steel-concrete composite structure and emergency repair method for bridge emergency repair, can be quick, effectual be applied to highway bridge emergency repair engineering.
Disclosure of Invention
The invention aims to solve the technical problem that the defects in the prior art are overcome, and the steel-concrete composite structure for emergency repair of the bridge is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a steel-concrete composite structure for bridge emergency repair which characterized in that: the bridge deck assembly comprises a plurality of steel beams and a plurality of bridge deck plate assemblies, wherein the steel beams are erected on two adjacent cover beams in parallel, the bridge deck plate assemblies are arranged on the steel beams, the steel beams comprise a plurality of I-shaped steel sections which are sequentially spliced along the extension direction of a bridge, and each bridge deck plate assembly comprises a groove-shaped perforated steel plate and a concrete bridge deck plate, the groove-shaped perforated steel plate is arranged on the I-shaped steel sections, and the concrete bridge deck plate is poured in the groove-shaped perforated steel plate;
the groove-shaped perforated steel plate is provided with a plurality of base plates, the groove-shaped perforated steel plate and the upper flange plate of the I-shaped steel section are connected through first bolts, and two adjacent groove-shaped perforated steel plates are connected through second bolts;
the concrete bridge deck is provided with a plurality of beam slab fixing grooves matched with the backing plates, and the beam slab fixing grooves are provided with temporary cover plates.
Foretell a steel reinforced concrete integrated configuration for bridge emergency repair, its characterized in that: the width of the bridge deck plate component is 4m, the length of the bridge deck plate component is 4m and 5m, and the length of the I-shaped steel segment is 4m, 5m, 8m and 10m.
Foretell a steel reinforced concrete integrated configuration for bridge emergency repair, its characterized in that: the web plates of two adjacent I-shaped steel sections are connected with each other through two vertical reinforcing plates, the two vertical reinforcing plates are respectively positioned on two sides of the web plate of the I-shaped steel section, the web plate of the I-shaped steel section is connected with the vertical reinforcing plates through a third bolt, the upper surface of the lower flange plate of the I-shaped steel section is connected with an upper reinforcing plate, the lower surface of the lower flange plate of the I-shaped steel section is connected with a lower reinforcing plate, the lower flange plates of the two adjacent I-shaped steel sections are connected with each other through the upper reinforcing plate and the lower reinforcing plate, and the upper reinforcing plate, the lower reinforcing plate and the lower flange plate of the I-shaped steel section are connected through a fourth bolt.
Foretell a steel reinforced concrete integrated configuration for bridge emergency repair, its characterized in that: the bottom of the groove-shaped perforated steel plate is provided with a plurality of first mounting areas for mounting a base plate, each first mounting area comprises a plurality of first screw holes for the first bolts to pass through, the lateral bridge side wall of the groove-shaped perforated steel plate is provided with a plurality of second mounting areas, and each second mounting area comprises a plurality of second screw holes for the second bolts to pass through;
a plurality of groups of third mounting areas are arranged on the upper flange plate of the I-shaped steel section, each third mounting area comprises a plurality of third screw holes for the first bolts to pass through, and nuts suitable for the first bolts are welded at the lower parts of the third screw holes;
the first installation area, the third installation area and the beam plate fixing grooves are equal in number and correspond to one another.
Foretell a reinforced concrete integrated configuration for bridge emergency repair, its characterized in that: the horizontal bridge of concrete decking is provided with a plurality of horizontal grooves of stepping down on to the lateral wall, the second installing zone with the quantity in horizontal groove of stepping down equals and the one-to-one.
Foretell a reinforced concrete integrated configuration for bridge emergency repair, its characterized in that: a plurality of backing plate screw holes are formed in the backing plate, the aperture of each backing plate screw hole is the same as that of each third screw hole, and the aperture of each first screw hole is larger than that of each third screw hole.
Foretell a steel reinforced concrete integrated configuration for bridge emergency repair, its characterized in that: the plurality of bridge deck plate assemblies are arranged in multiple rows and multiple columns, a plurality of fourth mounting areas are arranged on the longitudinal bridge side wall of the groove-shaped perforated steel plate, and each fourth mounting area comprises a plurality of fourth screw holes for second bolts to penetrate through;
the concrete bridge panel's vertical bridge is provided with a plurality of vertical grooves of stepping down to on the lateral wall, vertical groove of stepping down with the quantity of fourth installing zone equals and the one-to-one.
Meanwhile, the invention also discloses an emergency repair method by utilizing the steel-concrete composite structure, which has simple steps and convenient operation, all components are connected by welding and bolts, concrete does not need to be poured on site, the construction speed is high, prefabricated components in the steel-concrete composite structure can be assembled into emergency repair beam plate structures with different lengths and different widths according to the site requirements, and the method has strong flexibility and is characterized by comprising the following steps:
step one, formulating an emergency repair scheme: dismantling a damaged bridge between the two capping beams, flattening the upper surfaces of the capping beams, and determining the specification and the number of the deck plate assemblies and the specification and the number of the corresponding I-shaped steel segments according to the bridge span arrangement between the two capping beams;
step two, splicing and erecting steel beams: sequentially splicing the I-shaped steel sections to form a steel beam, and after a plurality of steel beams are obtained, longitudinally erecting the steel beams between two adjacent capping beams, wherein the steel beams are parallel to each other, and the length direction of the steel beams is consistent with the longitudinal bridge direction of the bridge;
step three, paving the bridge deck plate component on the steel beam, and the concrete process is as follows:
step 301, hoisting a bridge deck assembly to be installed at present onto the steel beam;
step 302, hanging the next bridge deck plate assembly on the steel beam, enabling the next bridge deck plate assembly to be tightly attached to one side of the previous bridge deck plate assembly, connecting the groove-shaped perforated steel plates of two adjacent bridge deck plate assemblies into a whole through a second bolt, and welding the tops of contact surfaces of the two adjacent groove-shaped perforated steel plates to complete the connection of the two adjacent bridge deck plate assemblies;
step 303, placing a base plate in a beam plate fixing groove in the bridge deck plate assembly, and connecting the base plate, a groove-shaped perforated steel plate in the bridge deck plate assembly and an I-shaped steel section in the steel beam into a whole through a first bolt;
step 304, mounting a temporary cover plate in the beam plate fixing groove in the bridge deck plate assembly;
and 305, repeating the step 302 to the step 304 for multiple times until the laying of the multiple deck plate assemblies is completed.
The emergency repair method using the steel-concrete composite structure is characterized by comprising the following steps of: a plurality of second mounting areas are arranged on the lateral wall of the transverse bridge of the groove-shaped perforated steel plate, and each second mounting area comprises a plurality of second screw holes for second bolts to pass through;
a plurality of transverse abdicating grooves are formed in the transverse bridge-direction side wall of the concrete bridge deck, and the second mounting area is equal to the transverse abdicating grooves in number and corresponds to the transverse abdicating grooves in a one-to-one mode;
in step 302, the second mounting areas of the two adjacent groove-shaped perforated steel plates are attached and correspond to each other one by one, and a second bolt penetrates through the second mounting areas of the two adjacent groove-shaped perforated steel plates to fixedly connect the two adjacent groove-shaped perforated steel plates.
The emergency repair method using the steel-concrete composite structure is characterized by comprising the following steps of: a plurality of fourth mounting areas are arranged on the longitudinal bridge-direction side wall of the groove-shaped perforated steel plate, and each fourth mounting area comprises a plurality of fourth screw holes for second bolts to pass through;
a plurality of longitudinal yielding grooves are formed in the lateral wall of the longitudinal bridge of the concrete bridge deck, and the number of the longitudinal yielding grooves is equal to that of the fourth mounting areas and corresponds to that of the fourth mounting areas one by one;
in step 302, the fourth mounting areas of the two adjacent groove-shaped perforated steel plates are attached to each other and are in one-to-one correspondence, and the second bolt penetrates through the fourth mounting areas of the two adjacent groove-shaped perforated steel plates to fixedly connect the two adjacent groove-shaped perforated steel plates.
Compared with the prior art, the invention has the following advantages:
1. the steel beam is erected between the two adjacent capping beams, and the I-shaped steel sections are quickly connected with the bridge deck plate assembly, so that a stable and sustainable emergency repair beam plate structure can be conveniently formed between the two adjacent capping beams, the bearing capacity is high, the practicability is high, the emergency repair beam plate structure is suitable for emergency repair engineering of the upper part structure of the bridge with the bridge span within the range of 13-40 m, the emergency repair beam plate structure can also be used as a permanent structure, the emergency repair beam plate structure is applied to construction and reinforcement of the bridge, and the application range is wide.
2. The I-steel sections and the bridge deck plate assembly have light dead weight, can be spliced by small machinery and manpower, and are convenient to transport and store, so that the required number of I-steel sections and the required number of bridge deck plate assemblies can be taken from a warehouse at any time according to the emergency repair requirement, and the working efficiency is high.
3. According to the invention, the beam plate structure for emergency repair is assembled in a bolt connection and welding manner, concrete does not need to be poured in situ, the construction speed is high, the time consumption is short, the construction progress is effectively ensured, and the passing function of the bridge is conveniently restored as soon as possible; simultaneously, when as interim emergency repair component, can cut the welding seam after finishing using, dismantle emergency repair beam slab structure for scattered component, be convenient for retrieve and reuse, the practicality is strong.
4. According to the invention, the second screw hole and the fourth screw hole are respectively arranged on the two opposite surfaces of the side wall of the groove-shaped perforated steel plate, so that the splicing scheme of the bridge deck plate assembly can be conveniently determined according to actual needs, and when a plurality of bridge deck plate assemblies are sequentially spliced only along the extension direction of a bridge, an emergency repair beam plate structure can be formed; when a plurality of bridge deck plate subassemblies are spliced in proper order along the extending direction and the width direction of bridge simultaneously, can form the emergent beam slab structure of salvageing of widening to can make up into the emergent beam slab structure of salvageing of different length and different width, the flexibility is strong.
5. The method has simple steps and convenient and fast operation, ensures the construction precision and the component quality by prefabricating the I-shaped steel sections, the bridge deck plate assembly and the temporary cover plate in a factory, avoids that the first bolt difficultly smoothly passes through the backing plate, the groove-shaped perforated steel plate and the upper flange plate of the I-shaped steel section due to construction errors and manual operation by arranging the hole diameter of the first screw hole on the bridge deck plate assembly to be larger than the hole diameter of the third screw hole on the steel beam and the hole diameter of the backing plate screw hole, and ensures the assembly completion degree.
In conclusion, the invention utilizes the quick connection of the I-shaped steel sections and the bridge deck plate component, is convenient for forming a stable and sustainable steel-concrete composite structure between two adjacent capping beams, has high bearing capacity, high construction precision, light dead weight and convenient transportation and storage, and is suitable for emergency repair engineering of the upper structure of the bridge; the adopted emergency repair method has simple steps and convenient operation, all components are welded and connected by bolts, concrete does not need to be cast in situ, the construction speed is high, prefabricated components in the steel-concrete combined structure can be assembled into emergency repair beam-slab structures with different lengths and different widths according to the on-site requirements, and the flexibility is strong.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic view showing the combination of the concrete deck slab and the channel steel plate according to example 1 of the present invention.
FIG. 3 isbase:Sub>A schematic view of the combination of the section A-A and the steel beam in FIG. 2.
FIG. 4 is a schematic view of the combination of the section B-B and the steel beam in FIG. 2.
Fig. 5 is a schematic structural diagram of a temporary cover plate in embodiment 1 of the present invention.
Fig. 6 is a schematic structural view of a slotted perforated steel plate in embodiment 1 of the present invention.
Fig. 7 is a schematic structural view of a concrete bridge deck according to embodiment 1 of the present invention.
FIG. 8 is a schematic structural view of a slotted perforated steel plate in example 2 of the present invention.
Fig. 9 is a schematic structural view of a concrete deck plate according to embodiment 2 of the present invention.
Fig. 10 is a flow chart of an emergency repair method according to the present invention.
Description of reference numerals:
1-i-section steel; 1-a third screw hole; 2-erecting a reinforcing plate;
3-upper reinforcing plate; 4-lower reinforcing plate; 5-a third bolt;
6-a fourth bolt; 7, a groove-shaped perforated steel plate; 7-1-a first screw hole;
7-2-second screw holes; 7-3-fourth screw hole; 8, a backing plate;
9-a first bolt; 10-a second bolt; 11-concrete deck slab;
11-1-beam slab fixation grooves; 11-2-a lateral relief groove; 11-3-longitudinal abdicating groove;
12-temporary cover plate; 12-1-convex edge.
Detailed Description
Example 1
As shown in fig. 1 to 7, the reinforced concrete composite structure for emergency repair of a bridge comprises a plurality of steel beams which are erected on two adjacent cover beams in parallel and a plurality of bridge deck plate assemblies arranged on the steel beams, wherein each steel beam comprises a plurality of i-shaped steel sections 1 which are sequentially spliced along the extension direction of the bridge, and each bridge deck plate assembly comprises a groove-shaped perforated steel plate 7 arranged on each i-shaped steel section 1 and a concrete bridge deck plate 11 poured in the groove-shaped perforated steel plate 7.
Be provided with a plurality of backing plates 8 on the cell type trompil steel sheet 7, backing plate 8 the cell type trompil steel sheet 7 with the upper flange plate of I-steel festival section 1 connects through first bolt 9, adjacent two the cell type trompil steel sheet 7 passes through second bolt 10 and connects.
The concrete bridge deck 11 is provided with a plurality of beam plate fixing grooves 11-1 matched with the backing plates 8, and the beam plate fixing grooves 11-1 are provided with temporary cover plates 12.
The steel beam is erected between two adjacent capping beams, the steel beam is quickly connected with the bridge deck plate assembly, a stable and sustainable steel-concrete structural bridge deck is conveniently formed between the two adjacent capping beams, the bearing capacity is high, the practicability is high, the steel beam and bridge deck plate assembly quick connection structure is suitable for bridge superstructure emergency repair engineering with a bridge span of 13 m-40 m, the I-shaped steel sections and the bridge deck plate assembly are matched, the bridge superstructure can be quickly formed and used for bridge emergency repair, the I-shaped steel sections can also be used as a permanent structure and used for bridge construction and reinforcement, the application range is wide, the self weight of a single bridge deck plate assembly is light, splicing among members can be completed by using small machinery and manpower, transportation and use are convenient, therefore, the required number of the I-shaped steel sections and the bridge deck plate assembly can be taken from a neutral warehouse, the plurality of the I-shaped steel sections 1 are sequentially connected along the length direction, the distance between the two adjacent capping beams is conveniently met, and the working efficiency is high.
In this embodiment, the width of bridge deck plate subassembly is 4m, the length of bridge deck plate subassembly is 4m, 5m, the length of I-steel festival 1 is 4m, 5m, 8m, 10m, through setting up not unidimensional bridge deck plate subassembly and I-steel festival 1, the festival section is waited to salvage to the bridge of adaptation not unidimensional of being convenient for, the technical staff operation of being convenient for.
In this embodiment, the webs of two adjacent i-steel segments 1 are connected to each other through two vertical reinforcing plates 2, the two vertical reinforcing plates 2 are respectively located on two sides of the web of the i-steel segment 1, the web of the i-steel segment 1 is connected to the vertical reinforcing plates 2 through third bolts 5, an upper reinforcing plate 3 is connected to the upper surface of the lower flange plate of the i-steel segment 1, a lower reinforcing plate 4 is connected to the lower surface of the lower flange plate of the i-steel segment 1, the lower flange plates of the two adjacent i-steel segments 1 are connected to each other through the upper reinforcing plate 3 and the lower reinforcing plate 4, and the upper reinforcing plate 3, the lower reinforcing plate 4 and the lower flange plate of the i-steel segment 1 are connected to each other through fourth bolts 6.
It should be noted that, a plurality of third bolts 5 are distributed on the vertical reinforcing plate 2 in a matrix shape, a plurality of fourth bolts 6 are distributed on the upper reinforcing plate 3 in a matrix shape, and the plurality of third bolts 5 and the plurality of fourth bolts 6 are all symmetrically distributed by taking the splicing seam of two adjacent i-steel segments 1 as an axis, the third bolts 5 penetrate through the vertical reinforcing plate 2 and the web of the i-steel segment 1 on both sides of the web of the i-steel segment 1, so that the webs of two adjacent i-steel segments 1 are both fixedly connected with the vertical reinforcing plate 2, the webs of two adjacent i-steel segments 1 are spliced, and the fourth bolts 6 sequentially penetrate through the upper reinforcing plate 3, the lower flange plate of the i-steel segment 1 and the lower reinforcing plate 4, so that the lower flange plates of two adjacent i-steel segments 1 are both fixedly connected with the upper reinforcing plate 3 and the lower reinforcing plate 4, and the lower flange plates of two adjacent i-steel segments 1 are spliced, thereby splicing the two adjacent i-steel segments 1 is realized;
it should be noted that the vertical reinforcing plates 2 are fixed on the two sides of the web plate of the i-steel segment 1, so that the splicing stability of the web plates of the two adjacent i-steel segments 1 is enhanced, and the bearing capacity and the resistance of the web plates of the i-steel segments 1 are also improved, and the upper reinforcing plate 3 and the lower reinforcing plate 4 are respectively fixed on the upper portion and the lower portion of the lower flange plate of the i-steel segment 1, so that the splicing stability of the lower flange plates of the two adjacent i-steel segments 1 is enhanced, and the bending resistance of the lower flange plate of the i-steel segment 1 is also improved.
In this embodiment, the bottom of the groove-shaped perforated steel plate 7 is provided with a plurality of first mounting areas for mounting a backing plate 8, each first mounting area comprises a plurality of first screw holes 7-1 for the first bolts 9 to pass through, the lateral bridge-direction side wall of the groove-shaped perforated steel plate 7 is provided with a plurality of second mounting areas, and each second mounting area comprises a plurality of second screw holes 7-2 for the second bolts 10 to pass through; a plurality of groups of third mounting areas are arranged on the upper flange plate of the I-shaped steel section 1, each third mounting area comprises a plurality of third screw holes 1-1 for the first bolts 9 to pass through, and nuts adapted to the first bolts 9 are welded at the lower parts of the third screw holes 1-1; the first installation area, the third installation area and the beam plate fixing groove 11-1 are equal in number and correspond to one another.
During site operation, the first bolts 9 sequentially penetrate through the base plate 8, the groove-shaped perforated steel plate 7 and the flange plate on the I-shaped steel section 1, the bridge deck plate assembly is fixed on the flange plate on the I-shaped steel section 1, and the concentrated stress formed on the groove-shaped perforated steel plate 7 by the first bolts 9 directly contacting the groove-shaped perforated steel plate 7 is avoided by arranging the base plate 8.
It should be noted that the third installation areas are uniformly distributed on the upper flange plate of the i-steel segment 1, the first installation areas on the groove-shaped perforated steel plate 7 are arranged in a matrix shape, the number of the columns of the first installation areas is the same as that of the steel beams, the distance between the columns of the first installation areas and the distance between two adjacent steel beams are the same, the number of the columns of the first installation areas is the same as that of the third installation areas, and the row distance between the first installation areas and that of the third installation areas are the same, so that the first installation areas and the third installation areas are in one-to-one correspondence.
It should be noted that the first installation area and the second installation area are arranged in a staggered manner along the width direction of the groove-shaped perforated steel plate 7, so that the first installation area and the second installation area are prevented from being too close to each other, and the beam plate fixing groove 11-1 and the transverse abdicating groove 11-2 of the concrete bridge deck 11 are prevented from being too close to each other, so that the structural strength of the concrete bridge deck 11 between the beam plate fixing groove 11-1 and the transverse abdicating groove 11-2 is ensured, and the risk of cracking of the concrete bridge deck 11 is reduced.
In this embodiment, a plurality of transverse abdicating grooves 11-2 are formed in the transverse bridge-direction side wall of the concrete bridge deck 11, and the second installation area corresponds to the transverse abdicating grooves 11-2 in number one to one.
During prefabrication, a first template matched with the beam slab fixing groove 11-1 and a second template matched with the transverse abdicating groove 11-2 are placed on the groove type perforated steel plate 7, then concrete is poured into the groove type perforated steel plate 7 to form a concrete bridge deck plate 11, and the concrete bridge deck plate 11 and the groove type perforated steel plate 7 are connected into a whole to form a bridge deck plate assembly.
It should be noted that in the bridge deck slab assembly, the plurality of second screw holes 7-2 are uniformly distributed in the transverse abdicating groove 11-2, the second bolts 10 penetrate through the second screw holes 7-2 of the two adjacent groove type perforated steel plates 7 to connect the two adjacent groove type perforated steel plates 7 into a whole, and the plurality of groove type perforated steel plates 7 are connected in sequence, so that the length requirement of the emergency bridge is conveniently met.
It should be noted that the transverse abdicating grooves 11-2 are arranged, so that technicians can conveniently install the second bolts 10, the i-steel sections 1 are located at the lower parts of the groove-shaped perforated steel plates 7 between the two adjacent transverse abdicating grooves 11-2, the first bolts 9 and the second bolts 10 are prevented from being too close to each other, and stress distribution on the groove-shaped perforated steel plates 7 is facilitated to be as uniform as possible.
In this embodiment, the backing plate 8 is provided with a plurality of backing plate screw holes, the aperture of each backing plate screw hole is the same as that of the third screw hole 1-1, and the aperture of the first screw hole 7-1 is larger than that of the third screw hole 1-1.
In practical use, the type of the first bolt 9 is an M20 anchor bolt, the diameters of the third screw hole 1-1 and the cushion plate screw hole are both 24mm, the diameter of the first screw hole 7-1 is 35mm, the third screw hole 1-1 is prevented from being shielded by the first screw hole 7-1, the third screw hole 1-1 is conveniently aligned with the cushion plate screw hole, the accuracy of the first bolt 9 sequentially penetrating through the third screw hole, the first screw hole 7-1 and the third screw hole 1-1 is improved, the first bolt 9 is prevented from difficultly and smoothly penetrating through the cushion plate 8, the groove-shaped perforated steel plate 7 and the upper flange plate of the I-shaped steel section 1 due to construction errors and manual operation, and the assembling completion degree is ensured.
In this embodiment, a convex edge 12-1 is disposed on the temporary cover plate 12, a groove adapted to the convex edge 12-1 is disposed on an upper portion of an inner side wall of the transverse abdicating groove 11-2 for clamping the convex edge 12-1, fig. 1 is a schematic structural diagram of the temporary cover plate 12 mounted in a part of the beam plate fixing grooves 11-1, and in actual use, the temporary cover plate 12 needs to be mounted in all the beam plate fixing grooves 11-1.
During actual use, the temporary cover plate 12 is an embossed steel plate, the antiskid performance is good, the periphery of the edge of the convex edge 12-1 and the edge of the temporary cover plate 12 are fixedly connected, the height of the convex edge 12-1 is smaller than the distance between the second screw hole 7-2 and the top end of the side wall of the groove-shaped perforated steel plate 7, the convex edge 12-1 is prevented from being influenced by the second bolt 10, the height of the groove of the transverse abdicating groove 11-2 is the same as that of the convex edge 12-1, the upper surface of the installed temporary cover plate 12 is flush with the upper surface of the concrete bridge deck plate 11 conveniently, the upper surface of the bridge deck plate assembly is kept flat, and vehicles can pass conveniently.
As shown in fig. 10, an emergency repair method using a steel-concrete composite structure includes the following steps:
step one, formulating an emergency repair scheme: dismantling a damaged bridge between two capping beams, flattening the upper surfaces of the capping beams, leaving at least a plane for lapping steel beams on the capping beams, and then determining the specification and the number of the deck plate assemblies and the specification and the number of corresponding I-shaped steel sections 1 according to the bridge span arrangement between the two capping beams; wherein, the specification refers to the structural size of the bridge deck plate component and the I-shaped steel segment 1.
In the embodiment, taking the width of a bridge to be rush-repaired as 4m and the length of the bridge to be rush-repaired as 30m as an example, 6 bridge deck plate assemblies with the width of 4m and the length of 5m are selected, and 6 i-shaped steel sections 1 with the length of 10m are selected; the width of the upper flange plate of the I-steel segment 1 is at least 0.6m, the sizes of the first mounting area and the third mounting area are both 0.5m multiplied by 0.5m, the size of the backing plate 8 is 0.48m multiplied by 0.48m, and the size of the second mounting area is 0.5m multiplied by 0.1m.
Step two, splicing and erecting steel beams: the I-steel sections 1 are sequentially spliced to form a steel beam, after the steel beam is obtained, the steel beam is vertically erected between two adjacent bent cap beams, the steel beam is parallel to each other, and the length direction of the steel beam is consistent with the extending direction of the bridge.
During actual construction, the contact surfaces of two adjacent I-steel sections 1 are connected into a whole in a full penetration welding mode, then the web plates of the two adjacent I-steel sections 1 are connected through a third bolt 5, and the bottom plates of the two adjacent I-steel sections 1 are connected through a fourth bolt 6, so that the connection stability among the I-steel sections 1 is enhanced, the integral performance of a bridge floor is enhanced, the connection mode is rapid, and the connection quality is high; meanwhile, when the beam plate structure is used as a temporary emergency repair component, the welding line can be cut after the beam plate structure is used, and the beam plate structure is disassembled into scattered components, so that the beam plate structure is convenient to recover and recycle.
It should be explained that two girder steels are respectively formed by splicing 3I-steel sections 1 in proper order, and then two girder steels are parallelly hung and established on two bent caps, so that the two ends of the girder steels are respectively placed on the two bent caps, and the distance between the two girder steels is at least 2m, so that the stability is strong, the undersize of the space between the two girder steels is avoided, and the risk of overturning the bridge deck plate assembly is effectively reduced.
Step three, paving a bridge deck plate assembly on the steel beam: in this embodiment, the bridge deck plate subassembly is multirow list and lays, lays 6 bridge deck plate subassemblies in proper order to the other end from the one end of two girder steels promptly, and concrete process is as follows:
step 301, hanging the bridge deck assembly to be installed on the steel beam.
During actual construction, the first mounting area of the groove-shaped perforated steel plate 7 is attached to and corresponds to the third mounting area of the I-shaped steel section 1 one by one from the third mounting area at any end of the steel beam, at this time, the first bolt 9 can be firstly placed into the backing plate screw hole of the backing plate 8, the first screw hole 7-1 of the first mounting area and the third screw hole 1-1 of the third mounting area, but is not fixed with a nut at the lower part of the third screw hole 1-1, so that the displacement of the bridge deck plate assembly to be currently mounted is limited to a certain extent, and the position of the bridge deck plate assembly to be currently mounted can be finely adjusted.
302, hanging the next bridge deck plate component on the steel beam and tightly attaching to one side of the previous bridge deck plate component, namely tightly attaching the next bridge deck plate component to one side of the previous bridge deck plate component in the transverse bridge direction; connecting the two adjacent bridge deck plate assemblies into a whole through second bolts 10, and welding the tops of contact surfaces of the two adjacent groove-shaped perforated steel plates 7 to complete the connection of the two adjacent bridge deck plate assemblies; in this embodiment, two adjacent second mounting areas of the groove-shaped perforated steel plates 7 are attached to each other and are in one-to-one correspondence with each other, and the second bolts 10 penetrate through the two adjacent second mounting areas of the groove-shaped perforated steel plates 7 to be fixedly connected with the groove-shaped perforated steel plates 7.
Step 303, placing a backing plate 8 in a beam plate fixing groove 11-1 in the bridge deck plate assembly, and connecting the backing plate 8, the groove-shaped perforated steel plate 7 in the bridge deck plate assembly and the I-shaped steel sections 1 in the steel beam into a whole through first bolts 9.
During actual construction, after the first bridge deck plate assembly and the second bridge deck plate assembly are connected with each other, the first bridge deck plate assembly and the second bridge deck plate assembly are simultaneously and fixedly connected with the steel beam, and the first bolt 9 sequentially penetrates through a base plate screw hole of the base plate 8, a first screw hole 7-1 of the first installation area, a third screw hole 1-1 of the third installation area and a nut on the lower portion of the third screw hole 1-1 to complete connection of the bridge deck plate assembly and the steel beam.
And step 304, installing a temporary cover plate 12 in the beam plate fixing groove 11-1 in the bridge deck plate component installed on the steel beam, inserting the convex edge 12-1 into the groove of the transverse abdicating groove 11-2 during actual installation, and prying the temporary cover plate 12 out of the transverse abdicating groove 11-2 when the temporary cover plate 12 is not needed, so that the maintenance and the replacement are convenient, and the flexibility is strong.
And 305, repeating the steps 302 to 304 for multiple times, namely after the next bridge deck plate assembly is hung, connecting the next bridge deck plate assembly with the previous bridge deck plate assembly according to the step 302, then connecting the next bridge deck plate assembly with the steel beam according to the step 303, finally installing the temporary cover plate 12 according to the step 304, and repeating the construction for multiple times until the laying of the multiple bridge deck plate assemblies is completed.
It should be noted that the bridge deck plate assemblies at the two ends are respectively close to the adjacent intact bridge deck as much as possible, and the bridge deck plate assemblies at the two ends are provided with steel plates lapped with the intact bridge deck to shield the gap between the bridge deck plate assemblies and the intact bridge deck; wherein the width of the steel plate is greater than the width of the gap between the deck plate assembly and the intact deck.
According to the invention, the beam plate structure for emergency repair is assembled in a bolt connection and welding mode, concrete does not need to be poured in situ, the construction speed is high, the time consumption is short, the construction progress is effectively ensured, the traffic function of the bridge can be conveniently restored as soon as possible, and the practicability is strong.
Example 2
As shown in fig. 8 to 9, the difference between the steel-concrete composite structure for emergency repair of a bridge in this embodiment and embodiment 1 is: the plurality of bridge deck plate assemblies are arranged in a plurality of rows and a plurality of columns; wherein, the bridge is salvageed according to the tape to the row number of bridge deck plate subassembly and the specification of line according to the number of rows is confirmed, and the quantity of girder steel is the twice that the bridge deck plate subassembly was listed as the number, has laid a bridge deck plate subassembly promptly on per two girder steels, and multiseriate bridge deck plate subassembly is connected side by side and is formed bridge superstructure, has guaranteed bridge superstructure's overall stability.
In this embodiment, a plurality of fourth mounting areas are arranged on the longitudinal bridge-direction side wall of the groove-shaped perforated steel plate 7, and each fourth mounting area comprises a plurality of fourth screw holes 7-3 for the second bolts 10 to pass through; a plurality of longitudinal yielding grooves 11-3 are formed in the lateral wall of the longitudinal bridge of the concrete bridge deck 11, and the longitudinal yielding grooves 11-3 correspond to the fourth mounting area in the same number one by one.
In practical use, a third template matched with the longitudinal abdicating groove 11-3 is required to be placed on the groove-shaped perforated steel plate 7, then concrete is poured into the groove-shaped perforated steel plate 7 to form a concrete bridge deck 11, and the concrete bridge deck 11 and the groove-shaped perforated steel plate 7 are connected into a whole to form a bridge deck plate assembly.
It should be noted that the fourth screw holes 7-3 and the second screw holes 7-2 are the same in size, the longitudinal abdicating grooves 11-3 and the transverse abdicating grooves 11-2 are the same in size, after the grooved perforated steel plates 7 are combined with the concrete bridge deck 11, the plurality of second screw holes 7-2 are uniformly distributed in the transverse abdicating grooves 11-2, and the plurality of fourth screw holes 7-3 are uniformly distributed in the longitudinal abdicating grooves 11-3, and the second bolts 10 penetrate through the second screw holes 7-2 and the fourth screw holes 7-3 of two adjacent grooved perforated steel plates 7, so that the other grooved perforated steel plate 7 is conveniently connected around one grooved perforated steel plate 7, and the grooved perforated steel plates 7 are arranged on the steel deck in a matrix shape, thereby realizing the arrangement of multiple rows of plate assemblies on the steel deck, increasing the deck width, and being beneficial to meeting different passing requirements of the bridge.
The emergency repair method using the steel-concrete composite structure in the embodiment is different from the embodiment 1 in that: the width of the bridge to be rush-repaired is greater than the width of the used deck plate assembly.
In step 302, the fourth mounting areas of the two adjacent groove-shaped perforated steel plates 7 are attached and correspond to one another, and the second bolts 10 penetrate through the adjacent fourth mounting areas of the two groove-shaped perforated steel plates 7 to fixedly connect the two adjacent groove-shaped perforated steel plates 7.
Therefore, the length and the width of the bridge deck plate component can be selected according to actual requirements, the construction is rapid, the flexibility is strong, the weather resistance of the material is strong, in addition, the cast-in-place concrete is not needed, and the bridge deck plate component can be used for temporary engineering of rapid emergency rescue of bridges and permanent engineering of normal road construction, post-war reconstruction and post-disaster reconstruction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. An emergency repair method using a steel-concrete composite structure is characterized in that: the method comprises the following steps that a steel-concrete composite structure for emergency repair of a bridge is utilized to carry out emergency repair, the steel-concrete composite structure comprises a plurality of steel beams which are erected on two adjacent bent caps in parallel and a plurality of bridge deck plate assemblies arranged on the steel beams, the steel beams comprise a plurality of I-shaped steel sections (1) which are sequentially spliced along the extension direction of the bridge, and each bridge deck plate assembly comprises a groove-shaped perforated steel plate (7) arranged on each I-shaped steel section (1) and a concrete bridge deck (11) poured in the groove-shaped perforated steel plate (7);
the groove-shaped perforated steel plates (7) are provided with a plurality of base plates (8), the groove-shaped perforated steel plates (7) and upper flange plates of the I-shaped steel sections (1) are connected through first bolts (9), and two adjacent groove-shaped perforated steel plates (7) are connected through second bolts (10);
a plurality of beam plate fixing grooves (11-1) matched with the backing plate (8) are formed in the concrete bridge deck (11), and temporary cover plates (12) are arranged on the beam plate fixing grooves (11-1);
the method comprises the following steps:
step one, formulating an emergency repair scheme: dismantling a damaged bridge between the two capping beams, flattening the upper surfaces of the capping beams, and determining the specification and the number of the deck plate assemblies and the specification and the number of the corresponding I-shaped steel segments (1) according to the arrangement of the bridge span between the two capping beams;
step two, splicing and erecting steel beams: sequentially splicing the I-shaped steel sections (1) to form a steel beam, and after a plurality of steel beams are obtained, longitudinally erecting the steel beams between two adjacent capping beams, wherein the steel beams are parallel to each other, and the length direction of the steel beams is consistent with the longitudinal bridge direction of the bridge;
step three, paving the bridge deck plate assembly on the steel beam, and the concrete process is as follows:
step 301, hoisting a bridge deck assembly to be installed at present onto the steel beam;
step 302, hanging the next bridge deck plate assembly on the steel beam, enabling the next bridge deck plate assembly to be tightly attached to one side of the previous bridge deck plate assembly, connecting the groove-shaped perforated steel plates (7) of the two adjacent bridge deck plate assemblies into a whole through second bolts (10), and welding the tops of contact surfaces of the two adjacent groove-shaped perforated steel plates (7) to complete the connection of the two adjacent bridge deck plate assemblies;
303, placing a base plate (8) in a beam plate fixing groove (11-1) in the bridge deck plate assembly, and connecting the base plate (8), a groove-shaped perforated steel plate (7) in the bridge deck plate assembly and an I-shaped steel section (1) in the steel beam into a whole through a first bolt (9);
step 304, installing a temporary cover plate (12) in the beam plate fixing groove (11-1) in the bridge deck plate component;
305, repeating the step 302 to the step 304 for multiple times until the paving of the plurality of bridge deck plate assemblies is completed;
a plurality of second mounting areas are arranged on the lateral wall of the transverse bridge of the groove-shaped perforated steel plate (7), and each second mounting area comprises a plurality of second screw holes (7-2) for second bolts (10) to pass through;
a plurality of transverse abdicating grooves (11-2) are formed in the transverse bridge-direction side wall of the concrete bridge deck (11), and the second installation area is equal to the transverse abdicating grooves (11-2) in number and corresponds to the transverse abdicating grooves in one-to-one mode;
in the step 302, second mounting areas of two adjacent groove-shaped perforated steel plates (7) are attached and correspond to each other one by one, and a second bolt (10) penetrates through the second mounting areas of the two adjacent groove-shaped perforated steel plates (7) to fixedly connect the two adjacent groove-shaped perforated steel plates (7);
a plurality of fourth mounting areas are arranged on the longitudinal bridge lateral wall of the groove-shaped perforated steel plate (7), and each fourth mounting area comprises a plurality of fourth screw holes (7-3) for second bolts (10) to pass through;
a plurality of longitudinal yielding grooves (11-3) are formed in the longitudinal bridge-direction side wall of the concrete bridge deck (11), and the number of the longitudinal yielding grooves (11-3) is equal to that of the fourth mounting areas and corresponds to that of the fourth mounting areas one by one;
in step 302, the fourth mounting areas of the two adjacent groove-shaped perforated steel plates (7) are required to be attached and correspond to one another, and the second bolts (10) penetrate through the fourth mounting areas of the two adjacent groove-shaped perforated steel plates (7) to fixedly connect the two adjacent groove-shaped perforated steel plates (7).
2. The emergency repair method using the steel-concrete composite structure according to claim 1, characterized in that: the bridge deck plate assembly is 4m in width, 4m and 5m in length, and the I-steel sections (1) are 4m, 5m, 8m and 10m in length.
3. The emergency repair method using the steel-concrete composite structure according to claim 1, characterized in that: the web of two adjacent I-steel section (1) is through two perpendicular reinforcing plates (2) interconnect, two perpendicular reinforcing plate (2) are located respectively the both sides of I-steel section (1) web, the web of I-steel section (1) pass through third bolt (5) with perpendicular reinforcing plate (2) are connected, be connected with on the upper surface of I-steel section (1) lower flange board reinforcing plate (3), be connected with down reinforcing plate (4) on the lower surface of I-steel section (1) lower flange board, two adjacent the lower flange board of I-steel section (1) passes through last reinforcing plate (3) with reinforcing plate (4) interconnect down, go up reinforcing plate (3) reinforcing plate (4) and the lower flange board of I-steel section (1) passes through fourth bolt (6) and connects down.
4. The emergency repair method using the steel-concrete composite structure according to claim 1, characterized in that: the bottom of the groove-shaped perforated steel plate (7) is provided with a plurality of first mounting areas for mounting a base plate (8), each first mounting area comprises a plurality of first screw holes (7-1) for the first bolts (9) to pass through, a plurality of second mounting areas are arranged on the lateral wall of the transverse bridge of the groove-shaped perforated steel plate (7), and each second mounting area comprises a plurality of second screw holes (7-2) for the second bolts (10) to pass through;
a plurality of groups of third mounting areas are arranged on an upper flange plate of the I-shaped steel segment (1), each third mounting area comprises a plurality of third screw holes (1-1) for the first bolts (9) to pass through, and nuts corresponding to the first bolts (9) are welded at the lower parts of the third screw holes (1-1);
the first mounting area, the third mounting area and the beam plate fixing grooves (11-1) are equal in number and correspond to one another.
5. The emergency repair method using the steel-concrete composite structure according to claim 4, characterized in that: the concrete bridge deck slab is characterized in that a plurality of transverse yielding grooves (11-2) are formed in the lateral wall of the transverse bridge of the concrete bridge deck slab (11), and the second installation area corresponds to the transverse yielding grooves (11-2) in an equal and one-to-one mode.
6. The emergency repair method using the steel-concrete composite structure according to claim 5, characterized in that: the backing plate (8) is provided with a plurality of backing plate screw holes, the aperture of each backing plate screw hole is the same as that of the corresponding third screw hole (1-1), and the aperture of the first screw hole (7-1) is larger than that of the corresponding third screw hole (1-1).
7. The emergency repair method using the steel-concrete composite structure according to claim 4, characterized in that: the plurality of bridge deck plate assemblies are arranged in multiple rows and multiple columns, a plurality of fourth mounting areas are arranged on the longitudinal bridge-direction side wall of the groove-shaped perforated steel plate (7), and each fourth mounting area comprises a plurality of fourth screw holes (7-3) for the second bolts (10) to penetrate through;
the concrete bridge deck (11) is provided with a plurality of vertical slots of stepping down (11-3) on to the lateral wall to the longitudinal bridge, vertical slot of stepping down (11-3) with the quantity of fourth installing zone equals and the one-to-one.
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