CN110593141A - Bridge prestress reinforcing structure and reinforcing method - Google Patents
Bridge prestress reinforcing structure and reinforcing method Download PDFInfo
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- CN110593141A CN110593141A CN201910895875.5A CN201910895875A CN110593141A CN 110593141 A CN110593141 A CN 110593141A CN 201910895875 A CN201910895875 A CN 201910895875A CN 110593141 A CN110593141 A CN 110593141A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention relates to a bridge prestress reinforcing structure, which comprises a bridge, wherein a fixed rod and a supporting rod which are parallel and opposite are fixed on the lower end surface of the bridge, the fixed rod and the supporting rod are respectively positioned at two ends of the bridge in the length direction, a plurality of steel wire ropes are arranged between the fixed rod and the supporting rod, the steel wire ropes are arranged along the length direction of the bridge, one ends of the steel wire ropes are connected with the fixed rod, the other ends of the steel wire ropes penetrate through the supporting rod and are connected with the supporting rod in a sliding manner, one ends of the steel wire ropes, which penetrate through the supporting rod, are provided with stress parts, and an adjusting structure for adjusting the interval between the. The invention also relates to a reinforcing method adopting the bridge prestress reinforcing structure. The invention has the advantages of providing prestress for the bridge, thereby improving the bending rigidity of the bridge, reducing the deformation and inhibiting the crack development.
Description
Technical Field
The invention relates to the technical field of municipal construction, in particular to a bridge prestress reinforcing structure and a reinforcing method.
Background
The bridge is reinforced, namely the bearing capacity and the service performance of a member and even the whole structure are improved by certain measures so as to meet new requirements. Namely, the condition that the bridge cannot be used continuously is processed. The reinforcement is caused by poor bridge durability, aging, improper design or poor construction quality. After the bridge is reinforced, the service life of the bridge can be prolonged, the bridge can meet the requirement of traffic volume by using a small amount of capital investment, the centralization of bridge investment can be alleviated, and the loss of personnel and property caused by bridge collapse can be prevented and avoided.
The existing reinforcing mode is a mode of reinforcing and reinforcing the building by utilizing carbon fiber, bonded steel and high-pressure grouting.
The existing carbon fiber cloth reinforcement technology is characterized in that a binder with high bonding strength is used for tightly pasting carbon fiber cloth on the surface of a concrete member to be reinforced, so that the carbon fiber cloth and the concrete member can be tightly combined together to participate in work together, the bearing capacity and the bending rigidity of the reinforced concrete member can be greatly improved by pasting the carbon fiber cloth, and the effects of reinforcement and strength improvement are achieved.
The prior art widely applies common carbon fiber cloth reinforcing technology, and because some structural members have higher requirements on deformation and cracking prevention, the simple use of common carbon fiber cloth for reinforcement cannot achieve good effect.
Disclosure of Invention
The invention aims to provide a bridge prestress reinforcing structure which has the advantages of providing prestress for a bridge, improving the bending rigidity of the bridge, reducing deformation and inhibiting crack development.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a bridge prestressing force reinforced structure, includes the bridge, is located to be fixed with parallel relative dead lever and bracing piece on the lower terminal surface of bridge, dead lever and bracing piece are located bridge length direction's both ends respectively, are located to be provided with a plurality of wire rope between dead lever and the bracing piece, wire rope sets up along the length direction of bridge, wire rope one end links to each other with the dead lever, and the other end runs through the bracing piece and slides with the bracing piece and links to each other, wire rope passes the one end of bracing piece is provided with the atress piece, is located thereby be provided with the regulation structure of adjusting the interval between atress piece and the bracing piece and adjusting wire rope degree of tightening between bracing piece and.
By adopting the technical scheme, the steel wire rope and the bridge jointly participate in work under the condition of keeping the steel wire rope in a prestressed state by applying the moving pulling force to the steel wire rope in advance, so that the bending strength of the bridge is improved, the deformation is reduced, and the development of cracks is inhibited.
The invention is further configured to: the adjusting structure comprises a screw and a threaded sleeve, a through hole formed along the axis of the screw is formed in the screw, the screw is sleeved on the steel wire rope through the through hole, one end of the screw is fixedly connected with the supporting rod, the other end of the screw is a free end, the threaded sleeve is located between the screw and the stressed part, one end of the threaded sleeve is sleeved on the screw and is in threaded connection with the screw, and the other end of the threaded sleeve is abutted to the stressed part.
By adopting the technical scheme, the tightening degree of the steel wire rope can be controlled by rotating the swivel nut, so that the operation of a constructor is facilitated.
The invention is further configured to: the stress piece comprises a sleeve sleeved on the steel wire rope, the inner hole of the sleeve is a tapered hole, one end with the larger diameter of the tapered hole deviates from the adjusting structure, a tapered elastic collet chuck matched with the taper of the tapered hole is arranged in the tapered hole, the steel wire rope penetrates through the inner hole of the tapered elastic collet chuck, one side, deviating from the adjusting structure, of the sleeve is provided with a rotating cap which pushes the tapered elastic collet chuck to move towards the end with the smaller diameter of the tapered hole, so that the tapered elastic collet chuck tightly holds the steel wire rope, and the rotating cap is in threaded connection with the sleeve.
By adopting the technical scheme, after the steel wire rope penetrates through the supporting rod, the stress piece is conveniently installed in the steel wire rope, and the position between the stress piece and the steel wire rope is relatively fixed.
The invention is further configured to: the tapered elastic collet chuck comprises a tapered conical pipe, the outer diameter of the tapered conical pipe gradually increases from one end to the other end, the diameter of an inner hole of the conical pipe is matched with that of a steel wire rope, and an opening arranged along the axial direction of the conical pipe is formed in the conical pipe.
Through adopting above-mentioned technical scheme, when the taper pipe removed to the less one end of bell mouth diameter, the taper pipe can contract to hold tightly wire rope firmly.
The invention is further configured to: the screw cap is provided with a through hole at the position opposite to the inner hole of the conical elastic collet chuck.
Through adopting above-mentioned technical scheme, make wire rope can pass the atress piece completely to ensure when installing the atress piece on wire rope, the atress piece can be stable link to each other with wire rope, and when promoting the atress piece through adjusting the structure, the difficult condition that breaks away from that appears between wire rope and the atress piece.
The invention is further configured to: the stress piece comprises a stress seat, a first perforation and a second perforation which are arranged at included angles are arranged on the stress seat, a mounting hole communicated with the second perforation is formed in the stress seat, a pressing plate is arranged in the mounting hole, and a driving mechanism for driving the pressing plate to move towards the inner direction of the second perforation is arranged on the stress seat.
Through adopting above-mentioned technical scheme, through being the first perforation and the second perforation that the contained angle set up, in the time of can avoiding wire rope to tighten, relative removal appears between wire rope and the atress piece to meet wire rope's the state of tightening, thereby the influence is to the prestressing force that the bridge applyed.
The invention is further configured to: the driving mechanism comprises a fixing plate detachably connected with the stress base, the fixing plate is arranged opposite to the mounting hole, a threaded through hole opposite to the mounting hole is formed in the surface of the fixing plate, and a compression bolt is connected in the threaded through hole in a threaded manner.
Through adopting above-mentioned technical scheme, rotate clamp bolt, make clamp bolt move to the direction of mounting hole, make clamp bolt promote the pressure strip and remove to when wire rope passed the second perforation, the pressure strip compresses tightly wire rope and fixes in the second perforation.
The invention is further configured to: the side wall of one side of the fixed rod, which faces the supporting rod, is provided with hanging rings matched with the steel wire ropes in number, one end of each steel wire rope, which is connected with the fixed rod, is provided with a hook, and the hanging rings are hooked by the hooks.
Through adopting above-mentioned technical scheme, can be quick link together dead lever and wire rope.
The invention is further configured to: the lower end face of the bridge is provided with a plurality of rows of lifting rings, the number of rows of the lifting rings is matched with the number of steel wire ropes, each row of the lifting rings are arranged from the fixing rod to the direction of the supporting rod, and the steel wire ropes sequentially penetrate through all the lifting rings in one opposite row.
Through adopting above-mentioned technical scheme, when wire rope installs, pass rings with wire rope to bear wire rope's weight through rings, be convenient for operating personnel installs wire rope.
The invention also provides a reinforcing method adopting the bridge prestress reinforcing structure, which comprises the following concrete steps:
firstly, fixing a fixing rod and a supporting rod at the left end and the right end of a bridge respectively;
secondly, installing a steel wire rope between the fixed rod and the supporting rod, so that one end of the steel wire rope is connected with the fixed rod, and the other end of the steel wire rope penetrates through the supporting rod and the adjusting structure on the supporting rod;
thirdly, installing a stress piece at one end of the steel wire rope penetrating through the support rod, and enabling the stress piece to be abutted against the adjusting structure;
repeating the second step and the third step until all the steel wire ropes are completely installed;
and fourthly, sequentially controlling the adjusting structure from the steel wire rope in the middle to the steel wire rope at the outermost side, so that the adjusting structure pushes the stress piece to move in the direction away from the supporting rod until the steel wire rope is in a tightened state.
By adopting the technical scheme, prestress can be applied to the bridge, so that the bending rigidity of the bridge is improved, the deformation is reduced, and the crack development is also inhibited.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the steel wire rope and the bridge jointly participate in work under the condition of keeping the steel wire rope in a prestressed state by applying moving tension to the steel wire rope in advance, so that the bending strength of the bridge is improved, the deformation is reduced, and the development of cracks is inhibited;
2. the steel wire rope is connected with the hanging ring through the hook, so that the steel wire rope can be quickly connected with the fixed rod;
3. through set up rings under the bridge, when wire rope installs, pass wire rope rings to bear wire rope's weight through rings, be convenient for operating personnel installs wire rope.
Drawings
FIG. 1 is a schematic structural view of a prestressed reinforcement structure for a bridge;
FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;
FIG. 3 is a partial structural view of an end of a bridge where a lower end support bar is located;
FIG. 4 is an exploded schematic view of the conditioning structure;
FIG. 5 is a sectional view of the force-receiving member in a state of being coupled to a reinforcing bar;
FIG. 6 is an exploded view of a force receiving member;
FIG. 7 is a schematic structural view of embodiment 2;
fig. 8 is an exploded view of the force receiving member in example 2.
In the figure, 1, a bridge; 11. a column; 2. fixing the rod; 3. a support bar; 4. a wire rope; 41. hooking; 5. a force-receiving member; 51. a sleeve; 52. a tapered resilient collet; 521. a taper pipe; 5211. an opening; 53. screwing the cap; 531. an anti-slip groove; 532. perforating; 54. a stressed seat; 541. a force receiving portion; 5411. a first through hole; 542. a clamping portion; 5421. a second through hole; 5422. mounting holes; 543. a reinforcing portion; 55. a fixing plate; 551. a threaded through hole; 56. a compression plate; 57. a hold-down bolt; 6. an adjustment structure; 61. a screw; 611. a through hole; 62. a threaded sleeve; 7. hanging a ring; 8. a lifting ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
referring to fig. 1 and 3, the prestressed reinforcement structure for a bridge disclosed in the present invention includes a bridge 1 and columns 11 located below two ends of the bridge 1 in the length direction. Be located and be provided with dead lever 2 and bracing piece 3 between two stands 11 of lower terminal surface of bridge 1, dead lever 2 and bracing piece 3 are fixed on the lower terminal surface of bridge 1 through the stock respectively. The fixed rod 2 and the support rod 3 are respectively positioned at two ends of the bridge 1 in the length direction, and a space is reserved between the support rod 3 and the upright post 11.
The length directions of the fixed rod 2 and the support rod 3 are arranged along the width direction of the bridge 1, and the fixed rod 2 and the support rod 3 are relatively parallel. Be located to be provided with many wire rope 4 between dead lever 2 and the bracing piece 3, wire rope 4 one end links to each other with dead lever 2, and wire rope 4's the other end passes bracing piece 3 and links to each other with sliding between the bracing piece 3. The steel wire rope 4 is provided with stress parts 5 which are relatively fixed on the steel wire rope 4, an adjusting structure 6 with adjustable length is arranged between the stress parts 5, one end of the adjusting structure 6 is fixedly connected with the supporting rod 3, and the other end of the adjusting structure is abutted against the stress parts 5.
Thereby promote atress piece 5 through adjusting structure 6, make atress piece 5 keep away from bracing piece 3, when atress piece 5 kept away from bracing piece 3, atress piece 5 drives wire rope 4 in step and runs through the one end removal of bracing piece 3 to make wire rope 4 be located the position between dead lever 2 and the bracing piece 3 and tighten.
Referring to fig. 1 and 2, a plurality of hanging rings 7 are fixed on a side wall of the fixing rod 2 facing the support rod 3 along a length direction of the fixing rod 2, and the number of the hanging rings 7 is the same as that of the steel wire ropes 4. A hook 41 is fixed at one end of the steel wire rope 4 connected with the fixed rod 2, and the hanging ring 7 is hooked by the hook 41, so that the steel wire rope 4 is connected with the fixed rod 2.
Referring to fig. 3 and 4, the adjusting structure 6 includes a screw 61 and a threaded sleeve 62 which are coaxially arranged and are in threaded fit. The screw 61 is provided with a through hole 611 arranged along the axis of the screw 61, and the diameter of the through hole 611 is larger than the diameter of the steel wire rope 4. One end of the screw 61 is fixedly connected with the support rod 3, the through hole 611 of the screw 61 is arranged opposite to the steel wire rope 4 penetrating through the support rod 3, and the other end of the screw 61 is a free end. The wire rope 4 passes through the through hole 611 of the screw 61 simultaneously when passing through the support rod 3. One end of the threaded sleeve 62, which is positioned between the screw 61 and the stress piece 5 arranged on the steel wire rope 4, is sleeved on the screw 61 and is in threaded connection with the screw 61, and the other end of the threaded sleeve 62 is abutted to the stress piece 5. The screw sleeve 62 has a hexagonal prism shape, thereby facilitating the use of a tool to rotate the screw sleeve 62.
Referring to fig. 5 and 6, the force-bearing member 5 includes a sleeve 51 disposed on the steel cable 4, wherein an inner hole of the sleeve 51 is a tapered hole. Referring to fig. 3, the smaller diameter end of the tapered hole of the sleeve 51 faces the side where the support rod 3 is located. A conical elastic collet 52 is arranged in the inner hole of the sleeve 51, the conical elastic collet 52 comprises a conical taper pipe 521 the outer diameter of which is gradually increased from one end to the other end, and the taper of the taper pipe 521 is matched with that of the conical hole of the sleeve 51. The diameter of the inner hole of the conical pipe 521 is matched with the diameter of the steel wire rope 4. An opening 5211 is formed in the wall of the conical pipe 521 along the axial direction of the conical pipe 521. The length of the cone 521 is longer than the length of the sleeve 51.
When the taper pipe 521 is inserted into the inside of the sleeve 51, the end of the taper pipe 521 with the larger diameter is located outside the sleeve 51. A screw cap 53 with an open end and a closed end is connected to the end of the sleeve 51 away from the support rod 3 in a threaded manner, and the open end of the screw cap 53 faces the sleeve 51. The depth of the screw cap 53 is larger than the length of the taper pipe 521 extending out of the sleeve 51. When the rotating screw cap 53 moves towards the support rod 3, the screw cap 53 pushes the taper pipe 521 to move towards the end with smaller diameter in the taper hole of the sleeve 51. A through hole 532 which is coaxially arranged with the inner hole of the taper pipe 521 and penetrates through the end surface of the closed end of the screw cap 53 is arranged at the position, opposite to the inner hole of the taper pipe 521, of the end surface of the closed end of the screw cap 53, and the diameter of the through hole 532 is larger than that of the taper pipe 521 and smaller than that of the end, with the larger diameter, of the taper pipe 521.
When the force receiving member 5 is mounted on the wire rope 4, the wire rope 4 sequentially passes through the sleeve 51, the taper pipe 521 and the through hole 532 of the screw cap 53, the screw cap 53 is rotated, the screw cap 53 pushes the taper pipe 521 to move towards one end with a smaller diameter in the tapered hole of the sleeve 51, and the taper pipe 521 contracts under the action of the opening 5211 along with the movement of the taper pipe 521, so that the wire rope 4 is clasped.
In order to facilitate the rotation of the screw cap 53, a plurality of anti-slip grooves 531 are formed on the outer surface of the screw cap 53 along the axial direction of the screw cap 53, so that the screw cap 53 can be easily rotated when being rotated through the anti-slip grooves 531.
Referring to fig. 1, a plurality of rows of lifting rings 8 are arranged on the lower end surface of a bridge 1, and the lifting rings 8 are fixedly connected with the bridge 1. The number of rows of the hoisting rings 8 is matched with the number of the steel wire ropes 4. The arrangement direction of each row of hanging rings 8 is arranged from the fixed rod 2 to the supporting rod 3. The steel cable 4 passes through all the hoisting rings 8 in the opposite row in sequence.
Example 2:
referring to fig. 7 and 8, the difference between the embodiment 2 and the embodiment 1 is that another force-receiving member 5 is adopted, the force-receiving member 5 includes a force-receiving seat 54, the force-receiving seat includes a force-receiving portion 541 and a clamping portion 542, and an included angle is formed between the force-receiving portion 541 and the clamping portion 542. In this embodiment, the angle between the force-receiving portion 541 and the clamping portion 542 is a right angle. A reinforced part 543 is disposed at the corner between the force-receiving part 541 and the clamping part 542, and the reinforced part 543 is connected to the force-receiving part 541 and the clamping part 542 respectively. The force receiving portion 541, the clamping portion 542, and the reinforcing portion 543 are fixed by welding or integrally formed. The opposite end of the force-bearing portion 541 and the clamping portion 542 is formed with a notch.
The force receiving portion 541 has a rectangular shape. The force receiving portion 541 has a longitudinal direction along the longitudinal direction of the adjustment structure 6. The force receiving portion 541 is provided with a first through hole 5411 through which the wire rope 4 passes, and the axial direction of the first through hole 5411 is provided along the longitudinal direction of the force receiving portion 541.
The clamping portion 542 is rectangular, and the longitudinal direction of the clamping portion 542 and the longitudinal direction of the force receiving portion 541 form a right angle. The clamp portion 542 is opened with a second through-hole 5421 through which the wire rope 4 passes, and the axial direction of the second through-hole 5421 is provided along the longitudinal direction of the clamp portion 542. The axis of the second through hole 5421 intersects with an extension line of the axis of the first through hole 5411 at one point.
An installation hole 5422 communicated with the second through hole 5421 is formed in the side wall surface of the clamping portion 542, which is away from the reinforcing portion 543, and the pressing plate 56 is freely placed inside the installation hole 5422. A fixing plate 55 fixed to the clamping portion 542 by a bolt is provided on a side wall surface of the clamping portion 542 facing away from the reinforcement portion 543. A threaded through hole 551 is formed at a position opposite to the mounting hole 5422 on the surface of the fixing plate 55, and a pressing bolt 57 is threadedly connected to the threaded through hole 551. The pressing bolt 57 passes through the threaded through hole 551 so as to protrude into the inside of the mounting hole 5422 and abut against the pressing plate 56.
When the force receiving member 5 is attached to the wire rope 4, the wire rope 4 is first inserted through the first through hole 5411 of the force receiving portion 541, and then the wire rope 4 is bent so that the wire rope 4 is inserted through the second through hole 5421 of the clamping portion 542. After the wire rope 4 passes through the second through hole 5421 of the clamping portion 542, the pressing plate 56 is placed in the mounting hole 5422, and the fixing plate 55 is mounted on the clamping portion 542. Finally, the pressing bolt 57 is mounted on the threaded through hole 551 and the pressing bolt 57 is rotated to move in the direction of the pressing plate 56, and the pressing plate 56 is pushed to press the wire rope 4 passing through the second through hole 5421.
The invention also discloses a reinforcing method adopting the bridge prestress reinforcing structure, which comprises the following concrete steps:
firstly, fixing a fixed rod 2 and a support rod 3 at the left end and the right end of a bridge 1 respectively;
secondly, installing a steel wire rope 4 between the fixed rod 2 and the supporting rod 3, so that one end of the steel wire rope 4 is connected with the fixed rod 2, and the other end of the steel wire rope 4 penetrates through the supporting rod 3 and an adjusting structure 6 on the supporting rod 3;
thirdly, installing a stress piece 5 at one end of the steel wire rope 4 penetrating through the support rod 3, and enabling the stress piece 5 to be abutted with the adjusting structure 6;
repeating the second step and the third step until all the steel wire ropes 4 are completely installed;
and fourthly, sequentially controlling the adjusting structure 6 from the steel wire rope 4 in the middle to the steel wire rope 4 at the outermost side, so that the adjusting structure 6 pushes the stress piece 5 to move towards the direction far away from the supporting rod 3 until the steel wire rope 4 is in a tightened state.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a bridge prestressing force reinforced structure, includes bridge (1) and is located the stand of bridge length direction both ends below, its characterized in that: a fixed rod (2) and a supporting rod (3) which are parallel and opposite are fixed on the lower end surface of the bridge (1), the fixed rod (2) and the support rod (3) are respectively positioned at two ends of the bridge (1) in the length direction, a plurality of steel wire ropes (4) are arranged between the fixed rod (2) and the support rod (3), the steel wire rope (4) is arranged along the length direction of the bridge (1), one end of the steel wire rope (4) is connected with the fixed rod (2), the other end of the steel wire rope penetrates through the supporting rod (3) and is connected with the supporting rod (3) in a sliding way, one end of the steel wire rope (4) penetrating through the supporting rod (3) is provided with a stress piece (5), and an adjusting structure (6) for adjusting the interval between the stress piece (5) and the supporting rod (3) so as to adjust the tightening degree of the steel wire rope (4) is arranged between the supporting rod (3) and the stress piece (5).
2. The bridge prestressed reinforcement structure of claim 1, wherein: the adjusting structure (6) comprises a screw rod (61) and a threaded sleeve (62), a through hole (611) formed along the axis of the screw rod (61) is formed in the screw rod (61), the screw rod (61) is sleeved on the steel wire rope (4) through the through hole (611), one end of the screw rod (61) is fixedly connected with the supporting rod (3), the other end of the screw rod is a free end, the threaded sleeve (62) is located between the screw rod (61) and the stress piece (5), one end of the threaded sleeve (62) is sleeved on the screw rod (61) and is in threaded connection with the screw rod (61), and the other end of the threaded sleeve (62) is abutted to the stress piece (5).
3. The bridge prestressed reinforcement structure of claim 1, wherein: the stress piece (5) comprises a sleeve (51) sleeved on the steel wire rope (4), the inner hole of the sleeve (51) is a taper hole, the larger end of the taper hole is deviated from the adjusting structure (6), a taper elastic collet chuck (52) matched with the taper of the taper hole is arranged in the taper hole, the steel wire rope (4) penetrates through the inner hole of the taper elastic collet chuck (52), one side, deviated from the adjusting structure (6), of the sleeve (51) is provided with a screwing cap (53) which pushes the taper elastic collet chuck (52) to move towards the smaller end of the taper hole so that the taper elastic collet chuck (52) can tightly hold the steel wire rope (4), and the screwing cap (53) is in threaded connection with the sleeve (51).
4. The bridge prestressed reinforcement structure of claim 3, wherein: the screwing cap (53) is provided with a through hole (532) at the position opposite to the inner hole of the conical elastic collet chuck (52).
5. The bridge prestressed reinforcement structure of claim 3, wherein: the conical elastic collet chuck (52) comprises a conical taper pipe (521) with the outer diameter gradually increasing from one end to the other end, the diameter of an inner hole of the taper pipe (521) is matched with that of the steel wire rope (4), and an opening (5211) arranged along the axial direction of the taper pipe (521) is formed in the taper pipe (521).
6. The bridge prestressed reinforcement structure of claim 1, wherein: the stress piece (5) comprises a stress base (54), a first perforation (532) and a second perforation (532) which are arranged at included angles are arranged on the stress base (54), a mounting hole (5422) communicated with the second perforation (532) is formed in the stress base (54), a pressing plate (56) is arranged in the mounting hole (5422), and a driving mechanism for driving the pressing plate (56) to move towards the inner direction of the second perforation (532) is arranged on the stress base (54).
7. The bridge prestressed reinforcement structure of claim 6, wherein: the driving mechanism comprises a fixing plate (55) detachably connected with the stress base (54), the surface of the fixing plate (55) is opposite to the mounting hole (5422), a threaded through hole (551) opposite to the mounting hole (5422) is formed in the surface of the fixing plate (55), and a pressing bolt (57) is in threaded connection with the threaded through hole (551).
8. The bridge prestressed reinforcement structure of claim 1, wherein: the fixing rod (2) is provided with a hanging ring (7) which is matched with the number of the steel wire ropes (4) on the side wall of one side, facing the supporting rod (3), of the fixing rod (2), a hook (41) is arranged at one end, connected with the fixing rod (2), of each steel wire rope (4), and the hanging ring (7) is hooked by the hook (41).
9. The bridge prestressed reinforcement structure of claim 1, wherein: the lower terminal surface of bridge (1) is provided with a plurality of rows rings (8), the row number of rings (8) and the quantity phase-match of wire rope (4), and every row rings (8) are all arranged from fixed rod (2) to bracing piece (3) direction, wire rope (4) pass all rings (8) of relative one row in proper order.
10. Method for reinforcing a prestressed reinforcement structure for bridges (1) according to any one of claims 1 to 9, characterised in that: the method comprises the following specific steps:
firstly, fixing a fixing rod (2) and a supporting rod (3) at the left end and the right end of a bridge (1) respectively;
secondly, installing a steel wire rope (4) between the fixed rod (2) and the supporting rod (3), so that one end of the steel wire rope (4) is connected with the fixed rod (2), and the other end of the steel wire rope (4) penetrates through the supporting rod (3) and an adjusting structure (6) on the supporting rod (3);
thirdly, installing a stress piece (5) at one end of the steel wire rope (4) penetrating through the support rod (3), and enabling the stress piece (5) to be abutted with the adjusting structure (6);
repeating the second step and the third step until all the steel wire ropes (4) are completely installed;
and fourthly, sequentially adjusting the length of the adjusting structure (6) from the direction of the steel wire rope (4) in the middle to the direction of the steel wire rope (4) at the outermost side, so that the adjusting structure (6) pushes the stress piece (5) to move towards the direction far away from the supporting rod (3) until the steel wire rope (4) is in a tightened state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910895875.5A CN110593141A (en) | 2019-09-21 | 2019-09-21 | Bridge prestress reinforcing structure and reinforcing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910895875.5A CN110593141A (en) | 2019-09-21 | 2019-09-21 | Bridge prestress reinforcing structure and reinforcing method |
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| CN110593141A true CN110593141A (en) | 2019-12-20 |
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| CN201910895875.5A Pending CN110593141A (en) | 2019-09-21 | 2019-09-21 | Bridge prestress reinforcing structure and reinforcing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695655A (en) * | 2021-01-29 | 2021-04-23 | 郑州铁路职业技术学院 | Reinforcing method for heavy-load railway bridge |
| CN115506616A (en) * | 2022-10-26 | 2022-12-23 | 北京城乡建设集团有限责任公司 | Underground high-voltage wire penetrating subway open excavation foundation pit protection device |
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Application publication date: 20191220 |