CN211689882U - Multidirectional bridge expansion joint structure that shifts - Google Patents
Multidirectional bridge expansion joint structure that shifts Download PDFInfo
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- CN211689882U CN211689882U CN201922139212.9U CN201922139212U CN211689882U CN 211689882 U CN211689882 U CN 211689882U CN 201922139212 U CN201922139212 U CN 201922139212U CN 211689882 U CN211689882 U CN 211689882U
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Abstract
The utility model provides a multidirectional bridge expansion joint structure and construction method that shifts, the backup pad is established to the fishback below, establishes rubber cushion pad between backup pad and the fishback, and the vertical rubber cushion that shifts is equipped with on striding seam fishback below concrete to backup pad bottom welding anchor board, and fishback and supporting plate mainly leans on tenon fourth of the twelve earthly branches steel pin joint to be fixed. The structure avoids the instantaneous impact stress generated between the comb plate and the concrete below the comb plate when the bridge is displaced vertically, reduces the influence of temperature stress, and reduces the expansion joint maintenance rate, the maintenance difficulty and the maintenance cost.
Description
Technical Field
The utility model belongs to the technical field of the bridge construction, a multidirectional bridge expansion joint's that shifts structure is related to for to the horizontal bridge to with erect the bridge to the higher broach type bridge expansion joint that requires that shifts.
Background
The bridge longitudinal bridge needs to be provided with expansion joints between the beam sections to adapt to the expansion of the beam sections caused by temperature change. The top of the expansion joint is usually covered with two comb-shaped steel plates, the comb-shaped ends of the two steel plates are mutually embedded on the bridge floor and have a certain tooth gap, so that the bridge floor is ensured to be flat, and a certain moving space is reserved. At present, the expansion joint comb plate mainly adopts two installation forms of pre-buried bolt anchoring and buried steel plate anchoring.
The embedded bolt anchoring structure is as shown in fig. 1, a plurality of anchoring bolts 3 are embedded in the expansion joint concrete 2 at two sides of the expansion joint 1, and the first comb plate 4 and the second comb plate 5 are respectively anchored through the bolts 3. The structure has more bolt rods and large installation and positioning difficulty, and mainly bears the shearing force and the tensile stress generated by the vehicle load by means of the combined action of the adhesive force of the comb plate and the concrete contact surface and the anchoring force and the shearing resistance of the bolt. Under the long-term combined action of temperature stress and driving load, the bolt is very easy to be loose, the fracture occurs, the comb plate and the concrete are peeled off and separated, the expansion joint is particularly easy to be formed in the area with large temperature difference day and night, the expansion joint maintenance rate is high, the bolt needs to be drilled in the original bolt position to be buried again during general maintenance, the expansion joint concrete is seriously damaged due to repeated maintenance, the expansion joint concrete needs to be broken for comprehensive maintenance, the maintenance cost is high, and the normal operation of the bridge is seriously influenced.
Burying steel sheet anchor formula structure underground as shown in fig. 2, pre-buried two anchor steel sheet 6 in the expansion joint concrete 2 of expansion joint 1 both sides, first fishback 4 and second fishback 5 weld with two anchor steel sheet 6 respectively. Although the structure avoids the stress defect of a pre-embedded bolt anchoring type structure, the comb plate and the anchoring steel plate are welded in advance and integrally installed before concrete is poured, and the expansion joint concrete needs to be poured after, so that the concrete leakage surface is small during pouring, whether the concrete leakage condition exists or not and the concrete under the comb plate is compact and plump is not easy to observe, the quality control of the concrete pouring process is not facilitated, and the quality hidden danger is easy to appear; in addition, once the structure is damaged after the vehicle is communicated, the maintenance difficulty is higher, expansion joint concrete needs to be broken, the welding and the pouring of the concrete are performed again, and the time and the cost are long.
And above-mentioned two kinds of current expansion joint structures have all mainly considered bridge longitudinal bridge to flexible volume, do not fully consider the horizontal bridge to the displacement that vehicle current vibration caused, especially ignored the vertical on-vehicle vibration displacement of roof beam expansion joint department. In fact, in the operation process of the bridge, the bridge vibrates up and down under the action of vehicle load to generate vertical displacement. Because the expansion joint needs to be strideed across to the second fishback, and the second fishback of current expansion joint structure strides seam end direct mount on the concrete face, with the hard contact of concrete, bridge vertical displacement can lead to striding and produces instantaneous impact stress between seam fishback and the below concrete, and weak points such as screw rod, face of weld can produce fatigue damage under long-term frequent effect, and above-mentioned problem is especially most outstanding in the expansion joint department of heavy traffic, large-scale bridge.
Disclosure of Invention
The utility model aims to provide a novel comb-tooth type expansion joint structure capable of being displaced in multiple directions aiming at the defects of the prior expansion joint structure, improve the quality of the expansion joint of the bridge, reduce the impact force of the vertical and transverse displacement of the bridge on the expansion joint structure when a vehicle passes, and reduce the maintenance rate; the expansion joint can reduce the maintenance difficulty and the maintenance cost during maintenance.
The technical scheme of the utility model as follows:
the utility model provides a multidirectional bridge expansion joint structure that shifts, includes first fishback, second fishback and a plurality of anchor bolt, and a plurality of anchor bolt lower extreme are pre-buried in the expansion joint concrete of expansion joint both sides respectively, and the broach end of second fishback stridees across the bridge expansion joint and the broach end gomphosis of first fishback, its characterized in that: the anchor plate comprises a first anchor plate, a second anchor plate and two support plates, wherein the first support plate and the second support plate are respectively arranged on the two sides of the first anchor plate; the top surfaces of the first anchoring plate and the second anchoring plate are respectively welded with the bottom surfaces of the first supporting plate and the second supporting plate, the first anchoring plate and the second anchoring plate are respectively poured in expansion joint concrete on two sides of an expansion joint, the first comb plate and the second comb plate are respectively installed on the top surfaces of the first supporting plate and the second supporting plate, and the upper end of the anchoring bolt penetrates through the two supporting plates and the comb plate and is in threaded connection with a fastening nut; the top surfaces of the first supporting plate and the second supporting plate are respectively provided with a mortise along the transverse bridge direction, the first comb plate and the second comb plate are respectively provided with a notch opposite to the mortises on the first anchoring plate and the second anchoring plate, tenon-and-mortise steel pins are inserted into the mortises and the notches, the lower half parts of the tenon-and-mortise steel pins are clamped in the mortises on the supporting plates, and the upper half parts of the tenon-and-mortise steel pins are clamped in the notches on the comb plates; a layer of buffer rubber pad is arranged between the supporting plate and the comb tooth plate; the first supporting plate has a certain distance to the expansion joint, a layer of vertical displacement rubber pad is laid between the side edge of the first comb supporting plate close to the expansion joint and the expansion joint, and the comb teeth ends of the first comb plate and the second comb plate are pressed on the vertical displacement rubber pad.
Compared with the prior art, the utility model, have following advantage:
1. the anchoring bolt and the anchoring steel plate are combined, so that the number of used bolt rod pieces is reduced, and the positioning difficulty of the anchoring bolt is reduced; the comb plate rear mounting structure is not bonded with concrete below and is not welded with a supporting steel plate, so that expansion joint concrete can be cast firstly, the concrete leakage area during casting is large, the concrete casting quality is convenient to control reliably, the fault tolerance rate of the construction process is improved, and the mounting accuracy of each component such as an anchoring bolt and an anchoring steel plate is ensured.
2. The vertical displacement rubber pad is arranged below the seam-crossing comb plate, so that the instantaneous impact stress generated between the comb plate and the concrete below the comb plate when the bridge vibrates up and down due to the fact that vehicles pass is avoided, and the long-term stable anchoring force of the bolts and the welding surface of the comb plate and the supporting steel plate is effectively protected; a supporting plate and a buffer rubber pad are arranged between the comb plate and the concrete, so that the conduction of temperature between the comb plate and the concrete is effectively blocked, and the influence of temperature stress is greatly reduced; for the vehicle-mounted transverse displacement, the transverse gap between the comb teeth can be adjusted to adapt. The structure can effectively prolong the service life of the expansion joint structure.
3. The utility model mainly uses the tenon-and-mortise steel pin to bear the shearing force and the tensile stress of the vehicle load, and the movable mounting structure of the tenon-and-mortise steel pin makes the tenon-and-mortise steel pin not easy to damage, thereby reducing the maintenance rate of the expansion joint; at later stage operation in-process, even appear damaging, the maintenance is also extremely simple and convenient, only needs to take out tenon fourth of twelve earthly branches steel pin and can lift the fishback off, generally need not break the concrete and carry out comprehensive maintenance.
The utility model is suitable for a various bridge expansion joints, specially adapted still superpose the large-scale expansion joint of the multidirectional displacement of horizontal and vertical displacement on the basis of ordinary longitudinal bridge to the displacement, piece together wide bridge expansion joint, cast-in-place roof beam and precast beam linking department expansion joint etc. if build extra-wide bridge floor bridge expansion joint, old bridge.
Drawings
FIG. 1 is a schematic view of a conventional embedded bolt anchored expansion joint structure;
FIG. 2 is a schematic view of a conventional structure of an embedded steel plate anchoring type expansion joint;
fig. 3 is a schematic view of the vertical structure of the expansion joint of the present invention;
fig. 4 is a schematic plan view of the expansion joint of the present invention;
FIG. 5 is an elevation view of a first support steel plate and its welded structure with an anchor steel plate;
FIG. 6 is an elevation view of a second support steel plate and its welded structure with an anchor steel plate;
FIG. 7 is a schematic cross-sectional view of a mortise and tenon steel pin;
FIG. 8 is a schematic cross-sectional view of the first and third portions of the mortise slot in the support plate;
figure 9 is a cross-sectional schematic view of a second portion of the slot on the combplate;
fig. 10 is a schematic plan view of the first support plate;
figure 11 is a schematic plan view of the first comb plate;
FIG. 12 is a schematic view showing the state of the supporting steel plate after installation and concrete pouring of the expansion joint during the construction process of the present invention;
fig. 13 is a schematic view of a state after the vertical displacement rubber pad is installed.
Detailed Description
As shown in fig. 3 and 4, the utility model provides a multidirectional bridge expansion joint structure that shifts, including first fishback 4, second fishback 5 and a plurality of anchor bolt 3, a plurality of anchor bolt 3 lower extreme are pre-buried respectively in the expansion joint concrete 2 of expansion joint 1 both sides, and the broach end of second fishback 5 strides over expansion joint 1 and the broach end gomphosis of first fishback 4; the device also comprises two anchoring plates, namely a first anchoring plate 7 and a second anchoring plate 8, and two supporting plates, namely a first supporting plate 9 and a second supporting plate 10; the top surfaces of the first anchoring plate 7 and the second anchoring plate 8 are respectively welded with the bottom surfaces of the first supporting plate 9 and the second supporting plate 10; first anchor plate 7 and second anchor plate 8 are pour respectively in the expansion joint concrete 2 in expansion joint 1 both sides, first fishback 4 and second fishback 5 are installed respectively at first backup pad 9 and 10 top surfaces of second backup pad, and anchor bolt 3 upper end is passed first, second backup pad 9 and 10 and first, second fishback 4 and 5 to the fishback fastening is fastened to the spiro union nut.
As shown in fig. 5, 6 and 10, the top surfaces of the first support plate 9 and the second support plate 10 are respectively provided with a mortise 11 along the transverse bridge direction. As shown in fig. 11, the first comb plate 4 is provided with a notch 12 opposite to the mortise on the first anchoring plate; the second comb plate is also provided with a notch opposite to the mortise on the second anchoring plate.
As shown in fig. 3, mortise and tenon steel pins 13 are inserted into the mortise and the notches, the lower half parts of the mortise and tenon steel pins 13 are clamped in the mortise on the support plate, and the upper half parts of the mortise and tenon steel pins are clamped in the notches on the comb plate; a layer of buffer rubber pad 14 is arranged between the support plate and the comb tooth plate; there is a certain distance between the first supporting plate 9 and the expansion joint, a layer of vertical displacement rubber gasket 15 is laid between the side of the first comb supporting plate 9 close to the expansion joint and the expansion joint, and the comb teeth ends of the first comb tooth plate 4 and the second comb tooth plate 5 are pressed on the vertical displacement rubber gasket 15.
Because the two comb tooth plates have different sizes, the second comb tooth plate spans the expansion joint and has a larger size, when the utility model is implemented, the size of the first supporting plate can be set to be relatively smaller, and the width along the bridge direction is smaller than that of the first anchoring plate; the second supporting plate is large in size, and the width of the second supporting plate along the bridge direction is larger than that of the second anchoring plate. The structure is also convenient for arranging the vertical displacement rubber pad 15 on one side of the first supporting plate.
The main function of the cushion rubber pad 14 is to cushion the impact force between the comb plate and the support plate and to isolate the heat conduction between the comb plate and the concrete below. In specific implementation, the thickness is set to 0.1 cm.
The main effect of the displacement rubber pad 15 is to provide a downward displacement space of the comb plate by means of elasticity when the load-carrying vehicle causes vertical displacement of the bridge, and hard impact between the comb plate and concrete below is avoided. In practice, the top surface of the position-changing rubber pad 15 is preferably flush with the top surface of the first supporting steel plate 9.
As shown in fig. 3, 5 and 6, the sides of the first and second support plates 9 and 10 away from the expansion joint 1 are bent upward, and the top surfaces of the bent portions are flush with the top surface of the comb plate. This structure can be spacing to the fishback, blocks the fishback along the displacement of vertical bridge to.
The mortise and tenon steel pin 13 is of a transversely arranged strip-shaped structure, the length of the mortise and tenon steel pin in the transverse bridge direction is smaller than 1/2 of the length of the mortise, and the cross section of the mortise and tenon steel pin is dumbbell-shaped, wherein the middle width of the mortise and tenon steel pin is smaller than the widths of the upper edge and the lower edge of the mortise and the mortise steel pin is as shown in fig. 7.
As shown in fig. 10 and 11, in cooperation with the structure of the mortise and tenon steel pin, a mortise 11 is provided on the supporting plate, and a notch 12 is provided on the comb plate. The mortise 11 of the supporting plate comprises 3 parts, a first part 111 from one end of the mortise to the middle of the mortise has a length of 1/2, the cross section of the part is rectangular as shown in fig. 8, the width of the rectangle is not less than the width of the bottom edge of the mortise steel pin, a second part 112 from the middle of the mortise to the other end of the mortise has a length equal to the length of the mortise steel pin, the cross section of the part is trapezoidal as shown in fig. 5 and 6, the shape of the part is matched with the lower half part of the mortise steel pin 13, and the rest is a third part 113 with a cross section same as that of the first part; the notch 12 on the comb plate comprises 3 parts corresponding to the mortise on the support plate, the cross sections of the first part 121 and the third part 123 of the notch are the same as the cross sections of the first part and the third part of the mortise, and the cross section of the second part 122 is an inverted trapezoid as shown in fig. 9 and is matched with the shape of the upper part of the mortise steel pin 13; as shown in fig. 3, the upper and lower halves of the mortise and tenon steel pin 13 are respectively caught in the second portions of the mortise and tenon slots.
The mortise 11 and the rabbet 12 are convenient to install and replace the mortise steel pin 13, and the mortise steel pin is convenient to fix by adopting the limiting rubber block.
As shown in fig. 4, in order to fix the mortise steel pin 13, a limiting rubber block 16 may be inserted into the first portion and the third portion of the mortise and the slot, respectively, to firmly extrude the mortise steel pin.
The concrete construction method of the multidirectional displacement bridge expansion joint structure comprises the following steps:
(1) as shown in fig. 5 and 6, the first support plate 9, the second anchor plate 8 and the second support plate 10 of the first anchor plate 7 are welded into a whole in a processing field in advance, and the anchor bolts 3 are installed in the reserved screw holes on the support plate and the anchor plate;
(2) as shown in fig. 12 and 13, after the bridge expansion joint is cut, the first anchoring plate 7 and the first supporting plate 9, and the second anchoring plate 8 and the second supporting plate 10 are respectively installed at two sides of the expansion joint 1, and the anchoring plates 7 and 8 are welded with the beam body reinforcing steel bars 17;
(3) pouring expansion joint concrete 2: the top surface of the concrete on one side of the first supporting plate 9 is poured to be flush with the bottom surface of the first supporting plate, and the concrete on one side of the second supporting plate 10 is poured to be flush with the top surface of the second supporting plate; when the expansion joint concrete is initially set, immediately installing the vertical displacement rubber gasket 15 between one side of the first supporting plate 9 close to the expansion joint and the expansion joint, and firstly collecting the surface of the concrete again when installing, so that a layer of cement slurry is formed on the surface of the concrete, and the vertical displacement rubber gasket 15 is ensured to be effectively bonded with the expansion joint concrete 2;
(4) cushion rubber pads 14 are arranged on the top surfaces of the first supporting steel plate 9 and the second supporting steel plate 10;
(5) as shown in fig. 3 and 4, the first comb plate 4 is placed on the first support plate 9, the second comb plate 5 is placed on the second support plate 10, the notches of the support plates are aligned with the mortises of the comb plates, and the upper ends of the anchor bolts 3 penetrate through the preset screw holes of the comb plates; and firstly, mounting a mortise and tenon steel pin 13 in the mortise and the rabbet, and then mounting a nut at the upper end of the anchoring bolt 3 and screwing.
When the mortise steel pin 13 is installed, the mortise steel pin 13 is firstly inserted into the first parts of the mortise and the notch, then slides to the second part, and finally, the limiting rubber blocks 16 are respectively inserted into the first parts and the third parts of the mortise and the notch to fix the mortise steel pin.
Claims (8)
1. The utility model provides a multidirectional bridge expansion joint structure that shifts, includes first fishback, second fishback and a plurality of anchor bolt, and a plurality of anchor bolt lower extreme are pre-buried in the expansion joint concrete of expansion joint both sides respectively, and the broach end of second fishback stridees across the bridge expansion joint and the broach end gomphosis of first fishback, its characterized in that: the anchor plate comprises a first anchor plate, a second anchor plate and two support plates, wherein the first support plate and the second support plate are respectively arranged on the two sides of the first anchor plate; the top surfaces of the first anchoring plate and the second anchoring plate are respectively welded with the bottom surfaces of the first supporting plate and the second supporting plate, the first anchoring plate and the second anchoring plate are respectively poured in expansion joint concrete on two sides of an expansion joint, the first comb plate and the second comb plate are respectively installed on the top surfaces of the first supporting plate and the second supporting plate, and the upper end of the anchoring bolt penetrates through the two supporting plates and the comb plate and is in threaded connection with a fastening nut; the top surfaces of the first supporting plate and the second supporting plate are respectively provided with a mortise along the transverse bridge direction, the first comb plate and the second comb plate are respectively provided with a notch opposite to the mortises on the first anchoring plate and the second anchoring plate, tenon-and-mortise steel pins are inserted into the mortises and the notches, the lower half parts of the tenon-and-mortise steel pins are clamped in the mortises on the supporting plates, and the upper half parts of the tenon-and-mortise steel pins are clamped in the notches on the comb plates; a layer of buffer rubber pad is arranged between the supporting plate and the comb tooth plate; the first supporting plate has a certain distance to the expansion joint, a layer of vertical displacement rubber pad is laid between the side edge of the first comb supporting plate close to the expansion joint and the expansion joint, and the comb teeth ends of the first comb plate and the second comb plate are pressed on the vertical displacement rubber pad.
2. The multidirectional displacement bridge expansion joint structure of claim 1, wherein: the width of the first supporting plate along the bridge direction is smaller than that of the first anchoring plate; the width of the second supporting plate along the bridge direction is larger than that of the second anchoring plate.
3. The multidirectional displacement bridge expansion joint structure of claim 1, wherein: the thickness of cushion rubber pad is 0.1 cm.
4. The multidirectional displacement bridge expansion joint structure of claim 1, wherein: the top surface of the position-changing rubber pad is flush with the top surface of the first supporting steel plate.
5. The multidirectional displacement bridge expansion joint structure of claim 1, wherein: one side of the first supporting plate and one side of the second supporting plate, which are far away from the expansion joint, are bent upwards, and the top surface of the bent part is flush with the top surface of the comb plate.
6. The multidirectional displacement bridge expansion joint structure of claim 1, wherein: the length of the mortise and tenon steel pin along the transverse bridge direction is less than 1/2 of the length of the mortise, and the cross section of the mortise and tenon steel pin is dumbbell-shaped, wherein the middle width of the mortise steel pin is less than the widths of the upper edge and the lower edge of the mortise steel pin.
7. The multidirectional displacement bridge expansion joint structure of claim 6, wherein: the mortise on the supporting plate comprises 3 parts, the first part is 1/2 the length of the mortise from one end of the mortise to the middle of the mortise, the cross section of the first part is rectangular, the width of the rectangle is not less than the width of the bottom edge of the mortise steel pin, the second part is equal to the length of the mortise steel pin from the middle of the mortise to the other end of the mortise, the cross section of the second part is matched with the shape of the lower half part of the mortise steel pin, and the rest part is a third part, the cross section of the third part is the same as that of the first part; the notch on the comb plate comprises 3 parts corresponding to the mortise on the support plate, the cross sections of the first part and the third part are the same as the cross sections of the first part and the third part of the mortise, and the cross section of the second part is matched with the shape of the upper half part of the mortise steel pin; and the upper half part and the lower half part of the mortise and tenon steel pin are respectively clamped in the second parts of the mortise and tenon slot.
8. The multidirectional displacement bridge expansion joint structure of claim 7, wherein: and the first part and the third part of the mortise and the rabbet are respectively inserted with a limiting rubber block.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922139212.9U CN211689882U (en) | 2019-12-03 | 2019-12-03 | Multidirectional bridge expansion joint structure that shifts |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922139212.9U CN211689882U (en) | 2019-12-03 | 2019-12-03 | Multidirectional bridge expansion joint structure that shifts |
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| CN211689882U true CN211689882U (en) | 2020-10-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021241A (en) * | 2019-12-03 | 2020-04-17 | 中交路桥建设有限公司 | Multidirectional displacement bridge expansion joint structure and construction method |
| CN114016412A (en) * | 2021-11-03 | 2022-02-08 | 中交二航局广西建设工程有限公司 | Construction method for integral post-cast cross beam of T-beam expansion joint |
-
2019
- 2019-12-03 CN CN201922139212.9U patent/CN211689882U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021241A (en) * | 2019-12-03 | 2020-04-17 | 中交路桥建设有限公司 | Multidirectional displacement bridge expansion joint structure and construction method |
| CN114016412A (en) * | 2021-11-03 | 2022-02-08 | 中交二航局广西建设工程有限公司 | Construction method for integral post-cast cross beam of T-beam expansion joint |
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