Connecting structure and construction method of new and old bridge by using corrugated steel plate rapid splicing

Abstract

The present application belongs to the technical field of bridge engineering, and particularly relates to a connecting structure for quickly widening new and old bridges by using corrugated steel plates and a construction method thereof. The connecting structure comprises a channel unit arranged on the outer side of the outer web plate of a side beam, bolts arranged on the channel unit and used for connecting the outer web plate of the side beam, and corrugated plate units arranged at the ends of the extension direction of the channel units and used for connecting the new and old bridges. Thus, 1) the corrugated plate units are arranged on two web plates with large vertical dimensions and large lateral intervals, instead of flange plates, so that the extension direction of the corrugated plate units can be set as the connecting direction of the new and old bridges, and the connecting structure has sufficient connecting strength and suitable lateral and longitudinal deformation allowance capacity; 2) the connecting structure can match various new and old bridges with different lateral interval widths by adjusting the length of the corrugated plate units.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge engineering, and particularly relates to a connecting structure for rapidly widening a new and old bridge with corrugated steel plates and a construction method. BACKGROUND

[0002] In bridge engineering, the operation of widening a new and old bridge refers to connecting and reinforcing the new and old bridges in the transverse direction of the bridge to ensure that the final bridge lane increase effect is stable, safe and reliable in the long term.

[0003] The core step of the operation of widening a new and old bridge is to connect and reinforce the respective side beams of the new and old bridges. The above-mentioned connecting and reinforcing mode can be divided into the following three modes: flexible, semi-rigid, and rigid.

[0004] Generally, the flexible mode mainly includes various types of organic flexible fillers, which can only transmit shear force and cannot transmit bending moment. The common rigid mode is the hard connection of various steel pipes or steel plates, which can transmit all shear force and bending moment.

[0005] The semi-rigid connection mode can be realized by using corrugated steel plates, which can not only transmit bending moment and bear large vertical load, but also improve the overall transverse stress performance of the widened new and old bridges, and can prevent the corrugated steel plates from being easily torn when the new and old bridges have relative transverse and longitudinal deformations.

[0006] For example, the Chinese utility model patent with the patent announcement number CN206219998U and the announcement date of June 6, 2017 discloses a bridge widening structure using corrugated steel plate connectors, which comprises a new bridge, an old bridge and a joint seam. The old bridge and the new bridge are connected transversely through the joint seam. The joint seam is provided with corrugated steel plate connectors for connecting the flange plates of the side beams of the old bridge and the new bridge. The corrugated steel plate connectors comprise vertically arranged corrugated steel plates and bolts. The corrugated steel plates are arranged between the flange plates of the side beams of the old bridge and the new bridge and are connected to the flange plates of the side beams of the old bridge and the new bridge through the bolts. The two straight plate segments of the corrugated steel plates are provided with long strip holes for the bolts to pass through. The bolts are friction type high-strength bolts.

[0007] The structure principle and advantages of the widening structure in the utility model patent are as follows: the longitudinal deformation of the main girder of the new bridge is not constrained by the main girder of the old bridge, the transverse bending deformation of the widened new and old bridges is reduced, shear failure of the old bridge support is avoided, the use performance of the widened bridge is ensured, the construction period is shortened, and good economic benefits are achieved.

[0008] However, the widening structure has at least the following two deficiencies in actual construction and use, which are also the technical problems to be solved by the present application, namely:

[0009] First, the installation position of the corrugated steel plate is the beam flange plate, the vertical dimension of which is small, and the corrugated steel plate with a larger vertical width cannot be used, so the overall connection strength is relatively low;

[0010] Second, the corrugated steel plate connects the new and old bridges through the thickness in the corrugated direction, so the width expansion structure can only adapt to one size of corrugated steel plate, in other words, the application range of the corrugated steel plate is extremely small, which is not practical.

[0011] Therefore, in view of the above, there is an urgent need for a new width expansion structure for effectively connecting the new and old bridges, which has a large connection area and strong versatility of the corrugated steel plate. SUMMARY

[0012] The application provides a connection structure for quickly expanding the width of new and old bridges by using a corrugated steel plate, which comprises a slot unit arranged on the outer side of the outer web plate of the side beam, a bolt arranged on the slot unit and used for connecting the outer web plate of the side beam, and a corrugated plate unit arranged at the two ends of the extension direction and used for connecting the new and old bridges, so that: 1. The corrugated plate unit is arranged on two webs with a large vertical dimension and a large lateral spacing, instead of the flange plate, so that the extension direction of the corrugated plate unit can be set as the connection direction of the new and old bridges, and the connection structure has sufficient connection strength and appropriate lateral and longitudinal deformation allowance; 2. The connection structure can match various new and old bridges with different lateral spacing widths by adjusting the length of the corrugated plate unit.

[0013] In addition, the application also provides a construction method of the connection structure, which ensures that the connection structure can be stably and efficiently installed and formed.

[0014] The application solves the above problems by adopting the technical scheme of a connection structure for quickly expanding the width of new and old bridges by using a corrugated steel plate, which comprises a slot unit arranged on the outer side of the outer web plate of the side beam, a bolt arranged on the slot unit and used for connecting the outer web plate of the side beam, and a corrugated plate unit arranged at the two ends of the extension direction and used for connecting the new and old bridges.

[0015] Further preferred technical solutions are that the slot unit comprises an intermediate plate arranged on the outer side of the outer web plate of the side beam, a mounting hole arranged on the intermediate plate and used for passing through the bolt, and two side plates arranged at the two end positions of the intermediate plate and used for connecting the corrugated plate unit.

[0016] Further preferred technical solutions are that the corrugated plate unit comprises a flat plate and an inclined plate arranged between adjacent two flat plates.

[0017] Further preferably, the two side plates are narrow side plates for connecting the flat plates at the endmost heads, and wide side plates for connecting the flat plates at the secondary endmost heads.

[0018] Further preferably, the corrugated plate unit further comprises a pressing crease arranged on the flat plate at the endmost head and used for blocking and limiting the bolt.

[0019] Further preferably, the flat plates at the endmost heads and the secondary endmost heads are provided with integral welds.

[0020] Further preferably, the end welds are arranged at the upper and lower ends of the pressing crease and the upper and lower ends of the side edges of the flat plate at the endmost head.

[0021] Further preferably, the pressing crease is inclined and parallel to the intermediate plate, and the flat plate at the endmost head is further provided with a flush crease parallel to the pressing crease and used for arranging the end welds.

[0022] Further preferably, the structure further comprises an anchoring hole arranged on the outer web of the side beam and used for mounting the bolt, and the bolt is an umbrella-shaped expansion bolt.

[0023] The construction method for connecting the new and old bridge by using the corrugated steel plate to quickly widen the bridge comprises the following steps in sequence:

[0024] S1, using the bolt to mount the slot spike unit on the outer side of the outer web of the side beam;

[0025] S2, inserting the corrugated plate unit from bottom to top in the two slot spike units;

[0026] S3, connecting the two slot spike units at both ends of the corrugated plate unit in the extension direction to complete the entire construction operation of the connecting structure. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the position structure of the present application.

[0028] Figure 2 It is a schematic diagram of the inclined installation method of the slot spike unit in the present application.

[0029] Figure 3 It is a schematic diagram of the shape of the corrugated plate unit before use in the present application.

[0030] Figure 4 It is a schematic diagram of the connection method of the corrugated plate unit when the slot spike unit is vertical in the present application.

[0031] Figure 5 Positional diagram of pressing creases when the slot unit is vertical in the present application.

[0032] Figure 6 Positional diagram of pressing creases and edge alignment creases when the slot unit is inclined in the present application.

[0033] Figure 7 Positional diagram of pressing creases and edge alignment creases when the slot unit is inclined in the present application.

[0034] Figure 8 Positional diagram of pressing creases and edge alignment creases when the slot unit is inclined in the present application.

[0035] In the figure, the meanings of the respective marks are as follows:

[0036] Side beam outer web plate a, cast-in-place strip b of flange plate, cast-in-place bridge deck plate c;

[0037] Slot unit 1, bolt 2, corrugated plate unit 3, anchoring hole 4;

[0038] Intermediate plate 101, mounting hole 102, narrow edge plate 103, wide edge plate 104, flat plate 301, inclined plate 302, pressing crease 304, overall weld 305, end weld 306, edge alignment crease 307, pressing plate area 301a, excess invalid plate area 301b. DETAILED DESCRIPTION

[0039] The following description is only a preferred embodiment of the present application, and does not limit the scope of the present application.

[0040] As shown in the accompanying drawings, Figures 1-8 A connecting structure for quickly splicing a new and old bridge by using corrugated steel plates, the structure comprising slot units 1 arranged on the outer side of the side beam outer web plate a, bolts 2 arranged on the slot units 1 and used for connecting the side beam outer web plate a, and corrugated plate units 3 arranged at the two ends of the extension direction and used for connecting the new and old bridge.

[0041] In the present embodiment, the meaning of the word "quickly" above refers to the main installation operation of the connecting structure, which only includes the screw fixing of the slot units 1 and the welding of the two ends of the corrugated plate units 3, so that the splicing operation of the new and old bridge is relatively simple and quick.

[0042] The expansion direction of the corrugated plate unit 3 is the continuation direction of the "corrugation", i.e. the transverse bridge direction, corresponding to the connection direction of the new and old bridges, or the thickness direction of the corrugated plate. The other two directions of the corrugated plate unit 3 are the width direction and the wave height direction. The former corresponds to the vertical load direction of the bridge, and the latter corresponds to the longitudinal bridge direction.

[0043] In addition, the corrugated plate is relatively easy to deform in the expansion direction and the wave height direction, ensuring that the connection structure can adapt to the transverse and longitudinal bridge deformation caused by the inconsistent shrinkage and creep between the new and old bridges. If the corrugated plate is replaced by a steel pipe or a steel plate that cannot deform, it is easy to break or fall under the impact of the transverse and longitudinal bridge deformation that cannot be completely avoided.

[0044] In addition, the corrugated plate is relatively difficult to deform in the width direction, ensuring that the connection structure can fully withstand the vertical load of the new and old bridges.

[0045] The channel bolt unit 1 includes an intermediate plate 101 arranged on the outer web plate a of the side beam, a mounting hole 102 arranged on the intermediate plate 101 and used for passing through the bolt 2, and two side plates arranged at the two end positions of the intermediate plate 101 respectively and used for connecting the corrugated plate unit 3.

[0046] In the embodiment, the intermediate plate 101 and the two side plates are integrally formed, and the two channel bolt units 1 and the corrugated plate unit 3 form the smallest complete unit of the connection structure. A plurality of the smallest complete units can be arranged as needed at uniform intervals in the longitudinal bridge direction between the new and old bridges.

[0047] The corrugated plate unit 3 includes a flat plate 301 and an inclined plate 302 arranged between adjacent two flat plates 301.

[0048] In the embodiment, the flat plates 301 and the inclined plates 302 are arranged at intervals, and the number of the flat plates 301 is one more than that of the inclined plates 302, ensuring that both ends of the corrugated plate unit 3 are the flat plates 301. However, the two flat plates (301) at the most end can be on the same side or on different sides, as shown in the drawings, which is the case of the same side, and vice versa. Figure 3

[0049] In addition, the "corrugation" shape of the corrugated plate unit 3 is an isosceles trapezoid.

[0050] Finally, the "flat" of the flat plate 301 means that when the corrugated plate unit 3 is placed on the ground, the flat plate 301 is parallel to the ground. Correspondingly, at this time, the inclined plate 302 is inclined with the ground, i.e. the meaning of "inclined". Both are defined in the state of being placed and ready for use. ​

[0051] It should be noted that the waveform board unit 3 is used in a vertical state, and the flat plate 301 needs to be bent before use, but this does not conflict with the meaning of the word "flat".

[0052] The two side plates are a narrow side plate 103 for connecting the plate 301 at the far end, and a wide side plate 104 for connecting the plate 301 at the next far end.

[0053] In this embodiment, the vertical dimensions of the two side plates are the same, but the horizontal dimensions are different in length, ensuring that there are two installation positions at one end of the waveform plate unit 3, namely: the outermost end is the position closest to the edge, and the second end is the second position counting inward from the outermost end.

[0054] Therefore, a single corrugated plate unit 3 has a total of 4 installation positions on the two channel steel units 1, which can further improve the connection strength between the two.

[0055] The waveform plate unit 3 also includes a flat plate 301 disposed at the far end, which is used to block and limit the tightening crease 304 of the bolt 2.

[0056] In this embodiment, the clamping crease 304 divides the flat plate 301 at the far end into an installation area and a clamping plate area 301a. The former is used to connect the narrow side plate 103, and the latter is used to press down the bolt 2 to prevent it from easily loosening and falling off.

[0057] Therefore, in other words, the bolt 2 is inserted in such a direction that its head is on the intermediate plate 101 and its shank is inside the outer web a of the side beam. Furthermore, the bending degree of the clamping crease 304 should not be too large to ensure that the clamping plate area 301a fully presses against the head of the bolt 2.

[0058] Both the outermost and second-to-second-end plates 301 are provided with integral welds 305.

[0059] In this embodiment, as shown in the appendix Figure 4 As shown, the position of the integral weld 305 is relatively outward and fully exposed, so a whole "integral" weld can be set, and the weld length is set to be equal to the vertical length of the channel steel unit 1.

[0060] End welds 306 are provided at the upper and lower ends of the pressing crease 304 and at the upper and lower ends of the side of the plate 301 at the very end.

[0061] In this embodiment, as shown in the appendix Figure 4As shown, the end head weld 306 is relatively inward and not exposed, so the welding equipment can only partially extend, and thus the "end head local" weld with a relatively small length is set.

[0062] For example, the vertical length of the channel single unit 1 is 100 cm, the length of the whole weld 305 is also 100 cm, and the length of each of the two end head welds 306 at the upper and lower ends is 15 cm.

[0063] The pressing crease 304 is inclined and parallel to the intermediate plate 101; the end plate 301 at the end head is also provided with an edge alignment crease 307 parallel to the pressing crease 304 and used for setting the end head weld 306.

[0064] In the prior art, the edge beam outer web a can be vertical or inclined. When it is the former, only the pressing crease 304 needs to be provided on the end plate 301 at the end head, and the pressing crease 304 is also vertical, and the side edge of the end plate 301 at the end head can be directly and smoothly attached to the wide edge plate 104, ensuring that the two groups of end head welds 306 can be smoothly implemented.

[0065] However, when the beam outer web a is inclined, the pressing crease 304 must also be inclined, so that the end head weld 306 on the narrow edge plate 103 can be smoothly implemented, and the pressing plate area 301a can smoothly press all the bolts 2.

[0066] However, the problem that follows is that the side edge of the end plate 301 at the end head is inclined and raised, and cannot be attached to the wide edge plate 104, and cannot provide the necessary butt joint gap for the other end head weld 306, so this is the role of the edge alignment crease 307.

[0067] In other words, one group of end head welds 306 on the wide edge plate 104 is set on the edge alignment crease 307, and the excessively long ineffective plate area 301b has no essential role.

[0068] The excessively long ineffective plate area 301b is in the shape of a right-angled triangle or a right-angled trapezoid, and the edge alignment crease 307 and the pressing crease 304 are parallel to each other.

[0069] The structure further includes an anchor hole 4 provided on the edge beam outer web a and used for mounting the bolt 2; the bolt 2 is an umbrella-shaped expansion bolt.

[0070] In the embodiment, compared with the ordinary expansion bolt, the umbrella-shaped expansion bolt has the advantages that the umbrella-shaped opening structure directly clamps the inner side edge of the anchor hole 4 instead of abutting against the inner annular surface of the anchor hole 4, the former is a hard connection, and the latter is a frictional connection, and the latter is relatively easy to fall off.

[0071] Compared with the bolt nut, the expansion bolt has the advantage that the nut does not need to be tightened in the outer web a of the side beam, which is very convenient and efficient.

[0072] The construction method for connecting the new and old bridge by using the corrugated steel plate to quickly widen the bridge comprises the following steps in sequence:

[0073] S1, using the bolt 2, installing the channel unit 1 on the outer side of the side beam outer web a;

[0074] S2, inserting the corrugated plate unit 3 into the two channel units 1 from bottom to top;

[0075] S3, connecting the two channel units 1 at both ends of the expansion and contraction direction of the corrugated plate unit 3, and completing the entire construction operation of the connecting structure.

[0076] In S2 of the embodiment, when the corrugated plate unit 3 is inserted into the channel unit 1 upward, the pressing fold 304 or the pressing fold 304 and the edge aligning fold 307 need to be bent first, and the pressing plate area 301a needs to be ensured to pass over the lowermost bolt 2 first, and then the corrugated plate unit 3 is directly pushed to the bottom, and the pressing plate area 301a will press all the bolts 2.

[0077] The corrugated plate unit 3 is in a vertically central position on the channel unit 1. In addition, even if a plurality of channel units 1 of the same transverse bridge width are adapted, the transverse bridge width size of the corrugated plate unit 3 also has a certain allowable error, because the overall weld 305 on the flat plate 301 at the end and the flat plate 301 at the next end has a certain position selection range, which greatly reduces the installation difficulty of the corrugated plate unit 3.

[0078] Correspondingly, the included angle of the pressing fold 304 can be an acute angle, a right angle, or an obtuse angle, as long as the pressing plate area 301a can sufficiently press the bolt 2 and the overall weld 305 and the end weld 306 have sufficient implementation positions.

[0079] Finally, whether the existing flange plate cast-in-place strip b is arranged at the flange plate gap between the new and old bridges or not, and whether the overall cast-in-place deck slab c is arranged or not.

[0080] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. These are modifications without creativity, and are protected by the patent law within the scope of the claims of the present application.

Claims

1. The connecting structure of the new and old bridge by using the corrugated steel plate quick splicing width, characterized in that: The structure comprises a slot bolt unit (1) arranged on the outer side of the outer web plate (a) of the side beam, a bolt (2) arranged on the slot bolt unit (1) and used for connecting the outer web plate (a) of the side beam, and a corrugated plate unit (3) arranged at the two ends of the extension direction of the slot bolt unit (1) and used for connecting the new and old bridges, The slot bolt unit (1) comprises a middle plate (101) arranged on the outer side of the outer web plate (a) of the side beam, a mounting hole (102) arranged on the middle plate (101) and used for passing through the bolt (2), and two side plates arranged at the two end positions of the middle plate (101) and used for connecting the corrugated plate unit (3), The corrugated plate unit (3) comprises a flat plate (301) and an inclined plate (302) arranged between two adjacent flat plates (301), The two side plates are a narrow edge plate (103) used for connecting the flat plate (301) at the most end, and a wide edge plate (104) used for connecting the flat plate (301) at the second end, The corrugated plate unit (3) further comprises a pressing crease (304) arranged on the flat plate (301) at the most end and used for blocking and limiting the bolt (2).

2. The connecting structure for connecting the new and old bridge by using the corrugated steel plate to quickly widen the bridge according to claim 1, characterized in that: The flat plate (301) at the most end and the second end is provided with an overall weld (305).

3. The connecting structure for connecting the new and old bridge by using the corrugated steel plate to quickly widen the bridge according to claim 1, characterized in that: The upper and lower end positions of the pressing crease (304) and the upper and lower end positions of the side edge of the flat plate (301) at the most end are provided with an end weld (306).

4. The connecting structure for connecting the new and old bridge beams by using the corrugated steel plate quick splicing and widening according to claim 3, characterized in that: The pressing crease (304) is inclined and parallel to the middle plate (101); the flat plate (301) at the most end is further provided with an edge alignment crease (307) parallel to the pressing crease (304) and used for arranging the end weld (306).

5. The connecting structure for connecting the new and old bridge by using the corrugated steel plate to quickly widen the bridge according to claim 1, characterized in that: The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt.

6. The construction method of the connecting structure for quickly splicing the new and old bridge by the corrugated steel plate according to claim 1, characterized in that The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt. 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The structure further comprises an anchoring hole (4) arranged on the outer web plate (a) of the side beam and used for mounting the bolt (2); the bolt (2) is an umbrella-shaped expansion bolt

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