CN115491977A - Bridge modulus type telescopic device and installation and maintenance method thereof - Google Patents

Abstract

The invention discloses a bridge modulus type telescopic device and an installation and maintenance method thereof, wherein the telescopic device comprises a support module and a displacement module which are fixed on a first side beam, wherein the two sides of a middle beam are respectively provided with the first side beam, the support module comprises a support box cover plate, a reinforcing rib, side beam connecting plates, a compression support, a support box, a cross beam, a pressure-bearing support and a middle beam connecting plate, the support box is fixedly connected onto the first side beam through the reinforcing rib, the compression support and the pressure-bearing support respectively form sliding pairs with the upper surface and the lower surface of the cross beam, the middle beam connecting plate is fixedly connected onto the cross beam, each lane is at least provided with two middle beam connecting plates, middle beam subsections are fixed onto middle beam connecting plates of different lanes, the displacement module comprises hinges, the two ends of each hinge are respectively fixed onto the displacement module and the middle beam, the support box cover plate for maintenance is fixed on the top of the support box cover plate through bolts, the support box cover plate is not covered by concrete, and the problems that the concrete of a transition zone is required to be damaged and the whole road is required to be blocked when the telescopic device is maintained are solved.

Description

Bridge modulus type telescopic device and installation and maintenance method thereof

Technical Field

The invention relates to the technical field of bridge expansion devices, in particular to a bridge modulus type expansion device and an installation and maintenance method thereof.

Background

The longitudinal deformation of the beam body can be caused by the effects of expansion with heat and contraction with cold, contraction, creep, live load and the like of the bridge, so that the longitudinal displacement of the beam end is caused. In order to ensure that vehicles stably pass through the bridge floor and meet the requirement of deformation of the upper structure of the bridge, expansion joints are required to be arranged between a beam end and a bridge abutment and at the discontinuous position of the bridge floor, various devices arranged at the expansion joints are generally called as highway bridge expansion devices, the expansion amount of a large-span bridge expansion device is generally larger, the application of a module type expansion device is the most extensive, the module type expansion device has the advantages of good shock absorption and buffering performance and the like, the requirement of large displacement can be met, the grid type structure belongs to a design of grid type, the design of the displacement amount can be randomly assembled according to certain modules according to actual requirements, the expansion device is the most used at present in China, and the expansion device is suitable for highway bridge engineering with the expansion amount of 160-3000 mm.

The prior art has the following disadvantages: (1) The expansion device is poured and fixed between the beam end and the abutment, when the maintenance is needed, the concrete of the transition zone needs to be damaged, then the expansion device is replaced really, a maintenance period is needed after the new concrete is poured, the maintenance construction period is long, the maintenance cost is high, and the influence on traffic is large; (2) The structure part which is displaced in the telescopic device is buried in concrete, so that the damage is easy to occur, and the internal condition cannot be quickly judged when the telescopic device is overhauled.

Disclosure of Invention

The invention provides a bridge modulus type telescopic device, aiming at the defects or improvement requirements in the prior art, the device comprises a support module and a displacement module which are fixed on a first side beam, wherein the two sides of a middle beam are provided with the first side beam, the support module comprises a support box cover plate, reinforcing ribs, side beam connecting plates, a compression support, a support box, a cross beam, a pressure-bearing support and a middle beam connecting plate, the support box is fixedly connected onto the first side beam through the reinforcing ribs, the compression support and the pressure-bearing support form sliding pairs with the upper surface and the lower surface of the cross beam respectively, the middle beam connecting plate is fixedly connected onto the cross beam, each lane is at least provided with two middle beam connecting plates, middle beam subsections are fixed onto middle beam connecting plates of different lanes, the displacement module comprises hinges, the two ends of each hinge are fixed onto the displacement module and the middle beam respectively, the support box cover plate for maintenance is fixed onto the top of the support box cover plate through bolts, the support box cover plate is not covered by concrete, and the problems that the concrete of a transition zone needs to be damaged and the whole road needs to be blocked when the bridge telescopic device is maintained are solved.

In order to achieve the above object, according to an aspect of the present invention, there is provided a bridge module type telescopic device, including:

the supporting module comprises a supporting box cover plate, a reinforcing rib, a side beam connecting plate, a pressing support, a supporting box, a cross beam, a pressure bearing support and a middle beam connecting plate, wherein the reinforcing rib is used for fixedly connecting the supporting box to the first side beam;

the center sill connecting plates are fixedly connected to the cross beam, at least two center sill connecting plates are arranged on each lane, and the center sill sectional bolts are fixed on the center sill connecting plates of different lanes, so that the center sills can be conveniently replaced by lane sections;

the displacement module comprises a hinge, and two ends of the hinge are respectively fixed on the displacement module and the middle beam;

the supporting box cover plate is used for overhauling and is fixed at the top of the supporting box through bolts and used for preventing rainwater and sundries from entering the supporting box, the supporting box and the first edge beam are poured in concrete to be fixed, and the supporting box cover plate is not covered by the concrete.

Furthermore, on the first boundary beam on both sides of the center sill, the support modules and the displacement modules are respectively arranged in pairs.

Further, the support module includes second boundary beam, waterstop, boundary beam connecting plate and steel block, second boundary beam fixed connection in support case apron towards one side of well roof beam, second boundary beam tip with first boundary beam aligns, boundary beam connecting plate both ends overlap joint in first boundary beam with on the second boundary beam to respectively with both bolt fixed connection for block rainwater and debris the waterstop is located well roof beam both sides, both ends respectively with well roof beam with second boundary beam fixed connection, the steel block is fixed in support case apron bottom is used for fixing compress tightly the support.

Furthermore, the bottom of the steel block and the inner bottom surface of the supporting box are provided with convex blocks, and the two convex blocks are respectively used for fixing the pressing support and the pressure-bearing support.

Further, the support module comprises a first sliding plate, a first stainless steel plate, a second stainless steel plate and a second sliding plate, the first stainless steel plate and the second stainless steel plate are fixed on the top surface and the bottom surface of the cross beam respectively, the first sliding plate is fixed at the bottom of the pressing support, the second sliding plate is fixed at the top of the pressure bearing support, and the first sliding plate and the second sliding plate are in sliding connection with the first stainless steel plate and the second stainless steel plate respectively.

Furthermore, grooves are formed in the bottom of the pressing support and the top of the pressure bearing support and used for limiting the first sliding plate and the second sliding plate respectively.

Furthermore, the displacement module comprises a displacement box, a displacement box cover plate, a first rotating shaft, a two-hole chain plate, a second rotating shaft and a three-hole chain plate, the displacement box is fixedly installed on the first edge beam and both are poured in concrete, the displacement box cover plate is fixed to the top of the displacement box through bolts, and the displacement box cover plate is not covered by the concrete and is convenient to open and overhaul;

the first rotating shaft is fixedly installed in the displacement box, the second rotating shaft is fixed to the middle beam, the first rotating shaft is connected with two second-hole chain plates in a rotating mode, the second rotating shaft is connected with two three-hole chain plates in a rotating mode, middle holes of the three-hole chain plates are connected with the second rotating shaft, the two-hole chain plates and the end portions of the three-hole chain plates form hinges through the rotating shafts, and the two three-hole chain plates are in a crossed state after being assembled.

Further, the displacement module comprises a gasket, and the gasket is arranged at the end parts of the first rotating shaft, the second rotating shaft and the hinge rotating shaft.

According to another aspect of the present invention, there is provided an installation and maintenance method of a bridge module type telescopic device, including the following steps:

s100, placing the telescopic device into the beam end preformed groove, placing the whole telescopic device into the beam end preformed groove, aligning the central line of the telescopic device with the central line of the gap of the beam end preformed groove, and aligning the upper surfaces of the middle beam, the support module and the first side beam with the pavement elevation;

s200, fixing the telescopic device, welding and fixing the anchoring piece of the telescopic device with the pre-buried rib and the transverse rib in the preformed groove, and keeping the alignment position in S101;

s300, pouring concrete, namely pouring steel fiber concrete in transition zones on two sides of the expansion device to enable the expansion device and the beam or the bridge abutment to form a whole, vibrating and compacting the concrete, strictly controlling the height and the flatness of the surface of the concrete, and preventing the support box cover plate and the displacement box cover plate from covering the concrete;

s400, opening a cover plate, unscrewing fixing bolts of the support box cover plate and the displacement box cover plate, and removing the support box cover plate and the displacement box cover plate to expose the interiors of the support box and the displacement box;

s500, overhauling the displacement module, detaching the first rotating shaft from the displacement box, adjusting the steel hinge to be upward and taking out, putting a new steel hinge into the displacement box for installation, and then fixing a displacement box cover plate on the displacement box through bolts;

s600, the supporting module is overhauled, the first stainless steel plate, the second stainless steel plate, the first sliding plate, the second sliding plate, the pressure bearing support and the pressing support are checked, damaged accessories are replaced, and finally the supporting box cover plate is fixed on the supporting box through bolts.

In general, compared with the prior art, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

1. the invention provides a bridge modulus type telescopic device which comprises a supporting module, a displacement module and an anchoring part, wherein the supporting module, the displacement module and the anchoring part are fixedly arranged on a first side beam, and a middle beam is fixed on the supporting module, the first side beam and the anchoring part are directly poured in concrete at the beam end, the supporting module comprises a pressure-bearing support, a pressing support and a cross beam arranged between the pressure-bearing support and the pressing support, a first stainless steel plate and a second stainless steel plate are respectively fixed on the upper surface and the lower surface of the cross beam, the pressing support and the pressure-bearing support are respectively contacted with the first stainless steel plate and the second stainless steel plate, a first sliding plate and a second sliding plate are respectively arranged at the bottom of the pressing support and the top of the pressure-bearing support, the cross beam can generate forward bridge displacement between the first sliding plate and the second sliding plate when the bridge is longitudinally stretched, a middle beam connecting plate is fixedly welded on the middle line of the cross beam, a middle beam bolt is fixed on the middle beam connecting plate so as to be convenient for repairing and replacing the middle beam, the supporting module and the displacement module are arranged in sections according to the width of a way, and a cover plate fixed by bolts is arranged at the top, so as to repair and replace the telescopic device of the bridge, and solve the problems that the bridge is required to destroy the concrete in repairing and the bridge.

2. The invention provides a bridge modulus type telescopic device which comprises first side beams arranged on two sides of a middle beam and a displacement module fixedly arranged on the first side beams, wherein the displacement module comprises reinforcing ribs, second side beams and water stops, the second side beams are aligned with the first side beams and fixedly connected with the first side beams through bolts, the reinforcing ribs are fixedly welded on the first side beams and used for fixing the displacement module, the water stops are arranged on two sides of the middle beam, one end of each water stop is fixed on the middle beam, the other end of each water stop is fixed on the second side beams, and when the middle beam displaces along the bridge direction, the water stops stretch out and draw back, so that rainwater and sundries are prevented from entering the telescopic device, and the overhaul period is prolonged.

3. The invention provides a bridge modulus type telescopic device which comprises a displacement module, wherein the displacement module is fixedly welded on first side beams on two sides of a middle beam, the displacement module comprises a displacement box, a displacement box cover plate, a first rotating shaft, a second rotating shaft and hinges, the displacement box is used for protecting the first rotating shaft and the hinges, the first rotating shaft is vertically fixed in the displacement box through bolts, the second rotating shaft is vertically fixed on the middle beam and is respectively connected with the first rotating shafts on the two sides through the hinges, when the first rotating shaft displaces along with the middle beam, the hinges stretch and move along, the uniformity of displacement of the telescopic device can be controlled by adjusting the hinges of the displacement module, the displacement box cover plate is fixed on the top of the displacement box through bolts, the displacement box cover plate is not covered by concrete after pouring, the displacement module can be overhauled only by opening the cover plate, the hinges and the first rotating shafts can be directly taken out of the displacement box and are integrally replaced, the displacement box is respectively arranged on different single-way lanes according to lane width, and only one-way blocking of the lane blocking can be realized when overhauling is carried out, and the influence of the telescopic device on traffic flow is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a bridge module telescopic device according to an embodiment of the present invention;

fig. 2 is a top view of a bridge module type telescopic device according to an embodiment of the present invention;

fig. 3 is a half sectional view of a support module of a bridge module telescopic device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a displacement module of a bridge modulus telescopic device according to an embodiment of the present invention;

fig. 5 is a partially enlarged view a of a bridge module telescopic device according to an embodiment of the present invention;

fig. 6 is a flow chart illustrating installation and maintenance of a bridge modular telescopic device according to an embodiment of the present invention.

Throughout the drawings, like reference numerals designate like features, and in particular: 1-support module, 3-displacement module, 5-middle beam, 7-anchor, 9-first side beam, 11-support box cover plate, 12-reinforcing rib, 13-second side beam, 14-water stop, 15-side beam connecting plate, 16-steel block, 17-pressing support, 18-first sliding plate, 19-first stainless steel plate, 20-support box, 21-cross beam, 22-second stainless steel plate, 23-second sliding plate, 24-bearing support, 25-middle beam connecting plate, 31-displacement box, 32-displacement box cover plate, 33-first rotating shaft, 34-two-hole chain plate, 35-second rotating shaft, 36-three-hole chain plate and 37-gasket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-4, the present invention provides a bridge module type telescopic device, which includes a support module 1, a displacement module 3, a center sill 5, an anchor member 7 and a first side sill 9, wherein the anchor member 7 and the support module 1 are welded and fixed on the first side sill 9, the first side sill 9 is welded and fixed on the displacement module 3, after concrete casting is completed, the tops of the support module 1, the displacement module 3 and the center sill 5 are leveled with a bridge deck, the support module 1 includes a compression support 17, a first sliding plate 18, a cross beam 21, a second sliding plate 23 and a pressure-bearing support 24, wherein the first sliding plate 18 is fixedly installed at the bottom of the compression support 17, the second sliding plate 23 is fixedly installed at the top of the pressure-bearing support 24, the pressure-bearing support 24 bears the cross beam 21 at the top thereof, compress tightly crossbeam 21 that support 17 compressed tightly its bottom, both are jointly spacing to crossbeam 21, when the bridge floor takes place vertical deformation, crossbeam 21 can be along following the bridge between the two to the slip displacement, well roof beam 5 welded fastening is on crossbeam 21, the both sides of well roof beam 5 use waterstop 14 respectively to be connected with support module 1, waterstop 14 can prevent in rainwater and the debris entry device, displacement module 3 embeds there is the telescopic hinge subassembly, through adjusting steerable its displacement homogeneity, support module 1 and displacement module 3's upper surface all aligns with the road surface elevation, and not covered by the concrete, lay a plurality of telescoping devices on multichannel road surface, need destroy the transition area concrete and need block the problem of whole road when having solved the bridge and overhauing telescoping device.

Further, as shown in fig. 1-3, the middle beam 5 is fixed on the cross beam 21, the cross beam 21 is borne in the supporting module 1, the supporting module 1 and the displacement module 3 are both arranged on the first side beams 9 on the two sides of the middle beam 5 in pairs, a water stop 14 is arranged in the displacement module 3 and connected with the middle beam 5, preferably, the water stop 14 can be made of waterproof rubber, the deformation capacity of following the movement of the middle beam 5 is increased, and the supporting module 1 and the displacement module 3 are all protected from rainwater.

Further, as shown in fig. 1, 3 and 5, the support module 1 includes a support box cover plate 11, a stiffener 12, a second side beam 13, a water stop 14, a side beam connecting plate 15, a steel block 16, a pressing support 17, a first slide plate 18, a first stainless steel plate 19, a support box 20, a cross beam 21, a second stainless steel plate 22, a second slide plate 23 and a pressure-bearing support 24, wherein the stiffener 12 is fixed on both sides of the support box 20, the support box 20 is fixed by welding the stiffener 12 and the first side beam 9, the support box cover plate 11 and the second side beam 13 are welded to be in an L-shaped structure, preferably, the second side beam 13 has the same structure as the first side beam 9 but shorter length, after the support box cover plate 11 is bolted on the top of the support box 20, the second side beam 13 faces the middle beam 5, the steel block 16 is further welded and fixed in a right-angle between the second side beam 13 and the support box cover plate 11, the steel block 16 plays a role in enhancing the firmness degree, and is also used for fixing the pressing support 17, further, the end parts of the second side beam 13 and the first side beam 9 are aligned, the two side beams are fixedly connected through a strip-shaped side beam connecting plate 15 through bolts, corresponding bulges are arranged at the bottom of the steel block 16 and the support box 20, the top of the pressing support 17 is provided with a groove which is embedded with the bulge on the steel block 16, the bottom of the pressure bearing support 24 is also provided with a groove which is embedded with the bulge at the bottom in the support box 20, the two bulges are respectively used for limiting the pressing support 17 and the pressure bearing support 24, further, the bottom of the pressing support 17 is provided with a first sliding plate 18, the top of the pressure bearing support 24 is provided with a second sliding plate 23, preferably, the bottom of the pressing support 17 and the top of the pressure bearing support 24 are both provided with sliding plate grooves which are respectively used for embedding and fixing the first sliding plate 18 and the second sliding plate 23, further, the cross member 21 is provided between the first slide plate 18 and the second slide plate 23, and the first stainless steel plate 19 and the second stainless steel plate 22 are fixedly mounted on the upper and lower surfaces of the cross member 21, respectively. Both are respectively with first slide 18 and second slide 23 sliding connection, and two sliding pairs that form all are located supporting box 20 insidely, prevent that rainwater impurity from getting into.

Further, as shown in fig. 5, the support module 1 further includes a center sill connecting plate 26, the top of the center sill connecting plate 26 is embedded at the bottom of the center sill 5, the center sill 5 is bolted to the connecting plate 26 through a threaded hole vertically penetrating through the center sill 5, and then the center sill connecting plate 26 is fixed on the cross beam 21 by welding.

Further, as shown in fig. 1-4, the displacement module 3 includes a displacement box 31, a displacement box cover plate 32, a first rotating shaft 33, a two-hole chain plate 34, a second rotating shaft 35, a three-hole chain plate 36, and a washer 37, wherein the displacement box cover plate 32 is bolted to the top of the displacement box 31, the two displacement boxes 31 are oppositely disposed on two sides of the middle beam 5, the opposite sides thereof are in a semi-open state, the displacement box 31 is welded and fixed to the first side beam 9, further, the first rotating shaft 33 is vertically and fixedly mounted in the displacement box 31, the first rotating shaft 33 is sleeved with the two-hole chain plates 34, the two-hole chain plates 34 can rotate around the first rotating shaft 33, the second rotating shaft 35 is vertically welded and fixed to the middle beam 5, the second rotating shaft 35 is rotatably connected with the two-hole chain plates 25, the centre bore of both sides is the rotation hole, and furtherly, the through-hole at three hole link joint 25 both ends uses same pivot to be connected with two hole link joint 34 tip through-holes in the displacement module 3 of both sides, and this pivot, first pivot 33, second pivot 35 all can adopt bolt structure, and two three hole link joints 25 overlook after accomplishing the assembly and be the cross form, form the steel hinge subassembly, and furtherly, packing ring 37 is located bolt structure department, when the hinge in the displacement module 3 takes place to rotate, packing ring 37 plays the guard action, increases the durability of displacement module 3, because displacement case apron 32 flushes with the concrete road surface, when needing to overhaul displacement module 3 inside, only need take off displacement case apron 32 from displacement case 31, can observe its inside and maintain.

As shown in fig. 1-5, according to another aspect of the present invention, a method for installing a bridge module type telescopic device according to the present invention includes:

s100, placing the telescopic device into a beam end preformed groove;

specifically, the whole telescopic device is placed into a beam end reserved groove, the central line of the telescopic device is aligned with the central line of the gap of the beam end reserved groove, and the upper surfaces of the middle beam 5, the support module 1 and the first side beam 9 are aligned with the pavement elevation;

s200, fixing the telescopic device;

specifically, the anchoring piece 7 of the telescopic device is welded and fixed with the embedded rib and the transverse rib in the preformed groove, and the alignment position in S101 is kept;

s300, pouring concrete;

specifically, the transition zones on both sides of the expansion device are poured with steel fiber concrete, so that the expansion device and the beam or the abutment form a whole, the concrete is vibrated to be compact, the height and the flatness of the surface of the concrete are strictly controlled, and the support box cover plate 11 and the displacement box cover plate 32 cannot cover the concrete.

Further, an overhaul method of a bridge modulus type telescopic device is provided, which specifically comprises the following steps:

s400, opening a cover plate;

specifically, the fixing bolts of the support box cover plate 11 and the displacement box cover plate 32 are unscrewed, and the two are removed to expose the interiors of the support box 20 and the displacement box 31;

s500, overhauling the displacement module;

specifically, the first rotating shaft 33 is detached from the displacement box 31, the steel hinge is adjusted to be upwardly removable, a new steel hinge is put in and installed, and then the displacement box cover plate 32 is bolted to the displacement box 31;

s600, overhauling the supporting module;

specifically, the first stainless steel plate 1, the second stainless steel plate 22, the first slide plate 18, the second slide plate 23, the pressure-bearing support 24, and the pressure-bearing support 17 are inspected, damaged parts are replaced, and finally the support box cover plate 11 is bolted to the support box 20.

It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the invention are possible and within the scope of the appended claims.

Claims (9)

1. A bridge modulus type telescopic device, comprising:

the supporting device comprises a supporting module (1) and a displacement module (3) which are fixed on a first side beam (9), and a middle beam (5) which is fixed on the supporting module (1) through bolts, wherein the first side beam (9) is arranged on two sides of the middle beam (5), the supporting module (1) comprises a supporting box cover plate (11), a reinforcing rib (12), a side beam connecting plate (15), a pressing support (17), a supporting box (20), a cross beam (21), a pressure bearing support (24) and a middle beam connecting plate (25), the reinforcing rib (12) is used for fixedly connecting the supporting box (20) to the first side beam (9), the pressing support (17) and the pressure bearing support (24) are fixed in the supporting box (20), and the pressing support (17) and the pressure bearing support (24) are respectively contacted with the upper surface and the lower surface of the cross beam (21) to form a sliding pair;

the center sill connecting plates (25) are fixedly connected to the cross beam (21), at least two center sill connecting plates (25) are arranged on each lane, and the center sill (5) is fixed on the center sill connecting plates (25) of different lanes in a segmented mode through bolts, so that the center sill (5) can be replaced in different lanes conveniently;

the displacement module (3) comprises a hinge, and two ends of the hinge are respectively fixed on the displacement module (3) and the middle beam (5);

the supporting box cover plate (11) is fixed to the top of the supporting box (20) through bolts and used for preventing rainwater and sundries from entering the supporting box (20), the supporting box (20) and the first edge beam (9) are poured in concrete to be fixed, and the supporting box cover plate (11) is not covered by the concrete.

2. A bridge module telescopic device according to claim 1, wherein the support modules (1) and the displacement modules (3) are respectively arranged in pairs on the first side beams (9) at two sides of the center beam (5).

3. The bridge modulus telescopic device according to claim 1, wherein the support module (1) comprises a second side beam (13), a water stop (14), a side beam connecting plate (15) and a steel block (16), the second side beam (13) is fixedly connected to one side of the support box cover plate (11) facing the middle beam (5), the end of the second side beam (13) is aligned with the first side beam (9), two ends of the side beam connecting plate (15) are lapped on the first side beam (9) and the second side beam (13) and respectively fixedly connected with the first side beam and the second side beam through bolts, the water stop (14) for blocking rain and sundries is arranged on two sides of the middle beam (5), two ends of the side beam connecting plate are respectively fixedly connected with the middle beam (5) and the second side beam (19), and the steel block (16) is fixed to the bottom of the support box cover plate (11) and is used for fixing the compression support (17).

4. A bridge module telescopic device according to any one of claims 3, wherein the bottom of the steel block (16) and the inner bottom surface of the support box (20) are provided with protrusions for fixing the pressure bearing support (17) and the pressure bearing support (24), respectively.

5. A bridge module telescopic device according to any one of claims 1-4, wherein the support module (1) comprises a first sliding plate (18), a first stainless steel plate (19), a second stainless steel plate (22) and a second sliding plate (23), the first stainless steel plate (19) and the second stainless steel plate (22) are fixed on the top surface and the bottom surface of the cross beam (21) respectively, the first sliding plate (18) is fixed on the bottom of the pressing support (17), the second sliding plate (23) is fixed on the top of the pressure-bearing support (24), and the first sliding plate (18) and the second sliding plate (23) are slidably connected with the first stainless steel plate (19) and the second stainless steel plate (22) respectively.

6. A bridge module telescopic device according to claim 5, wherein the bottom of the pressure support (17) and the top of the pressure support (24) are provided with grooves for limiting the first sliding plate (18) and the second sliding plate (23), respectively.

7. A bridge module type telescopic device according to claim 1, wherein the displacement module (3) comprises a displacement box (31), a displacement box cover plate (32), a first rotating shaft (33), a second hole chain plate (34), a second rotating shaft (35) and a hole chain plate (36), the displacement box (31) is fixedly installed on the first side beam (9), both of which are cast in concrete, the displacement box cover plate (32) is bolted on the top of the displacement box (31), the displacement box cover plate (32) is not covered by concrete, so as to be convenient for opening and maintenance;

the first rotating shaft (33) is fixedly installed in the displacement box (31), the second rotating shaft (35) is fixed to the middle beam (5), the first rotating shaft (33) is connected with two of the two hole chain plates (34) in a rotating mode, the second rotating shaft (35) is connected with two of the three hole chain plates (36) in a rotating mode, a middle hole of each of the three hole chain plates (36) is connected with the second rotating shaft (35), the two hole chain plates (34) and the end portions of the three hole chain plates (36) form a hinge through rotating shafts, and the two hole chain plates (36) are in a cross state after being assembled.

8. A bridge module telescopic device according to claim 7, wherein said displacement module (3) comprises washers (37), said washers (37) being mounted to said first (33), second (35) and hinge shaft ends.

9. An installation and maintenance method based on the bridge modular expansion device, which is characterized in that the bridge modular expansion device and the implementation thereof according to any one of claims 1 to 8 are applied, and the method comprises the following steps:

s100, placing the telescopic device into the beam end preformed groove, integrally placing the telescopic device into the beam end preformed groove, aligning the central line of the telescopic device with the central line of the gap of the beam end preformed groove, and aligning the upper surfaces of the middle beam, the support module and the first side beam with the pavement elevation;

s200, fixing the telescopic device, welding and fixing the anchoring piece of the telescopic device with the pre-buried rib and the transverse rib in the preformed groove, and keeping the alignment position in S101;

s300, pouring concrete, pouring steel fiber concrete in transition zones on two sides of the telescopic device to enable the telescopic device and the beam or the abutment to form a whole, vibrating the concrete tightly, strictly controlling the height and the flatness of the surface of the concrete, and preventing the supporting box cover plate and the displacement box cover plate from covering the concrete;

s400, opening a cover plate, unscrewing fixing bolts of the support box cover plate and the displacement box cover plate, and removing the support box cover plate and the displacement box cover plate to expose the interiors of the support box and the displacement box;

s500, overhauling the displacement module, disassembling the first rotating shaft from the displacement box, adjusting the steel hinge to be upward and taking out, putting a new steel hinge into the displacement box, and then fixing a displacement box cover plate on the displacement box through bolts;

s600, the supporting module is overhauled, the first stainless steel plate, the second stainless steel plate, the first sliding plate, the second sliding plate, the pressure bearing support and the pressing support are checked, damaged accessories are replaced, and finally the supporting box cover plate is fixed on the supporting box through bolts.

Images