CN201817779U - External transverse anchoring system for hollow plate bridge body - Google Patents
External transverse anchoring system for hollow plate bridge body Download PDFInfo
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- CN201817779U CN201817779U CN2010205564050U CN201020556405U CN201817779U CN 201817779 U CN201817779 U CN 201817779U CN 2010205564050 U CN2010205564050 U CN 2010205564050U CN 201020556405 U CN201020556405 U CN 201020556405U CN 201817779 U CN201817779 U CN 201817779U
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- bracket
- ground tackle
- anchoring system
- hollow slab
- prestressed cable
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Abstract
The utility model relates to an external transverse anchoring system for a hollow plate bridge body. A left plate of the hollow plate bridge is provided with a left bracket; a right plate is provided with a right bracket; each of the left bracket and the right bracket is provided with a corrugated pipe; a pre-stressed cable passes through the corrugated pipe; the left bracket is connected with the right bracket by the pre-stressed cable; the left end and the right end of the pre-stressed cable are fixed by a left anchor and a right anchor respectively; the pres-stressed cable is connected with a middle plate by a hoisting ring; side plates at two sides of the hollow plate bridge are provided with reinforced concrete brackets respectively; the reinforced concrete brackets and the side plates are cast together; the reinforced concrete brackets at two sides are connected with the pre-stressed steel cables; two ends of the pre-stressed cable are fixed with the reinforced concrete brackets by anchors; therefore, the structural stiffness and integration of the whole anchoring system are improved; the tightening of the anchoring end is ensured, the loosening of the pre-stressed cable is avoided, and the problems such as easily-loosened sectional steel anchors, easily-generated fatigue destruction and rusted steel plates and the like in the existing anchoring system are solved.
Description
Technical field:
The utility model belongs to bridge strengthening maintenance construction technical field, is specifically related to the external horizontal anchoring system of a kind of hollow slab bridge.
Background technology:
Prestressed concrete assembling hollow slab bridge is a kind of main force bridge type of highway in China bridge, is used widely medium and small striding in the highway bridge of footpath.Along with the influence of many unfavorable factors such as the quick growth of volume of transport, vehicle overload, all diseases have appearred in many hollow slab bridges, need in time carry out maintenance and reinforcement.In various reinforcement means, the external prestressing strengthening method is a kind of effective method.This method is by improve the supporting capacity of bridge at bridge tensile region stretch-draw external prestressing tendon, its basic principle is to make full use of concrete compressive property, by external prestressing tendon the beam body is applied precompression, offset the internal force that the part external load produces with the recurvation square that precompression produces, thereby reach the purpose of improving the structure functional performance and improving its ultimate bearing capacity.
Can the external prestressing strengthening method realize the consolidation effect of expecting, closely related with external prestressed anchoring system.For prestressed concrete assembling hollow slab bridge, at present the anchoring system and the technology of external prestressing strengthening are: implant crab-bolt → prestressed ground tackle liner plate → along the horizontal stretch-draw external prestressing tendon at the bottom of hollowcore slab of bridge in the lateral wall concrete of two side plates in hollow slab bridge both sides.The prestressed anchor liner plate adopts section steel manufacture usually, vertically is arranged symmetrically in two side plate outsides along hollowcore slab, and is anchored on the side plate concrete side walls by crab-bolt.Though adopt the anchoring system installation and the construction of shaped steel ground tackle liner plate all comparatively easy, but because the rigidity of the relative concrete core unit of rigidity of shaped steel is little a lot, reinforce that the back occurs easily in the bridge operation that shaped steel ground tackle liner plate is loosening, fatigue failure and corrosion problem, this all will cause the lax of the transverse prestress rope that applies, transverse prestress degree at the bottom of the reduction plate, thereby the reinforcing to the assembling hollow slab bridge causes adverse effect, when serious even can cause and reinforce failure.
The utility model content:
In sum, in order to overcome the deficiency of prior art problem, the utility model provides external horizontal anchoring system of a kind of hollow slab bridge and construction technology thereof, it is that the steel concrete bracket is set respectively on the side plate of hollow slab bridge both sides, the steel concrete bracket is cast in side plate, the steel concrete bracket of both sides connects by prestressed cable, the prestressed cable two ends are fixed with ground tackle and steel concrete bracket, thereby improve the rigidity of structure and the globality of whole anchoring system, guaranteed that anchored end can not become flexible, avoided the lax of prestressed cable, it is easily loosening to have solved in the former anchoring system shaped steel ground tackle liner plate, easily produce problems such as fatigue failure and steel plate corrosion.
For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that
The external horizontal anchoring system of a kind of hollow slab bridge, it comprises left side plate, middle plate and right side plate, wherein: described left side plate is provided with left bracket, right side plate is provided with right bracket, is provided with bellows on left bracket and the right bracket, and prestressed cable is installed in the bellows, left side bracket is connected by prestressed cable with right bracket, the prestressed cable left end is fixed by left ground tackle and left bracket, and the prestressed cable right-hand member is fixed by right ground tackle and right bracket, and prestressed cable is connected with middle plate by suspension ring.
The technical solution of the utility model can also be achieved in that the structure of described left bracket and right bracket is identical, and cross sectional shape is " L " type, and left bracket and right bracket are the steel concrete bracket.
The technical solution of the utility model can also be achieved in that the prestressed cable of the middle plate correspondence of described hollow slab bridge is provided with protection tube.
The technical solution of the utility model can also be achieved in that described prestressed cable is a un-bonded prestressed steel strand, or is finish rolling deformed bar.
The technical solution of the utility model can also be achieved in that described left ground tackle is arranged on the outside of left bracket, and right ground tackle is arranged on the outside of right ground tackle, and left ground tackle and right ground tackle are strand tapered anchorage or male cone type ground tackle or supporting type ground tackle.
The technical solution of the utility model can also be achieved in that between described left ground tackle and the left bracket and be provided with left backing plate, be provided with right backing plate between right ground tackle and the right bracket.
The beneficial effects of the utility model are:
(1) adopts the anchored end load parts of the steel concrete bracket of new cast in two side plate outsides of hollow slab bridge as external transverse prestress, substitute conventional shaped steel ground tackle liner plate, solved the shortcoming that shaped steel ground tackle liner plate is easily loosening, be out of shape greatly and easily take place fatigue failure and corrosion damage.
(2) the steel concrete bracket of new cast adopts rebar-planting anchorage technique to link to each other with the side plate of original hollow slab bridge.Rebar-planting anchorage technique is popular in recent years a kind of novel reinforced construction technology, its principle is that reinforcing bar is implanted in original concrete structure by high-strength structure glue, thereby and fluid concrete reach stressed purpose jointly so that new fluid concrete is connected to integral body with original concrete.The rebar-planting anchorage technique maturation, calculate accurately, easy construction, reinforcing be reliable, the concrete bracket that can guarantee new cast closely connects as a whole with the side plate of original hollow slab bridge.
(3) prestressed cable of the present utility model can adopt un-bonded prestressed steel strand, also can adopt finish rolling deformed bar, determines its quantity and section area according to reinforcing needs, purchases conveniently.Exposed parts overcoat PE sleeve pipe at the bottom of the plate plate can effectively protect prestressed cable that corrosion does not take place in the prestressed cable.
(4) ground tackle of the present utility model can adopt various types of finished product ground tackles such as supporting type, clip type, male cone type, technology maturation, and technology is reliable, and can select to buy according to the needs of institute's stabilization works.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of steel concrete bracket of the present utility model;
Fig. 3 is the left view of the utility model Fig. 2.
The specific embodiment:
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment one:
As Fig. 1, Fig. 2, shown in Figure 3, the external horizontal anchoring system of a kind of hollow slab bridge, it comprises left side plate 2, middle plate 3 and right side plate 4, left side plate 2 is provided with left bracket 1, right side plate 4 is provided with right bracket 5, left side bracket 1 and right bracket 5 are the steel concrete bracket, the cross sectional shape of left side bracket 1 and right bracket 5 is " L " type, be provided with bellows 11 on left side bracket 1 and the right bracket 5, prestressed cable 9 is installed in the bellows 11, left side bracket 1 is connected by prestressed cable 9 with right bracket 5, prestressed cable 9 is a un-bonded prestressed steel strand, and prestressed cable 9 left ends are fixed by left ground tackle 13 and left bracket 1, and left ground tackle 13 is arranged on the outside of left bracket 1, prestressed cable 9 right-hand members are fixed by right ground tackle 6 and right bracket 5, right ground tackle 6 is arranged on the outside of right ground tackle 6, and left ground tackle 13 and right ground tackle 6 are the male cone type ground tackle, and prestressed cable 9 is connected with middle plate 3 by suspension ring 8, the prestressed cable 9 of middle plate 3 correspondences of hollow slab bridge is provided with protection tube 10, and protection tube 10 is the PE sleeve pipe.
With to span be the hollow slab bridge of 16m to carry out the external horizontal anchoring of hollow slab bridge be example, may further comprise the steps when specifically constructing:
The first step: quantity and the stretching force of determining prestressed cable 9
The span of this hollow slab bridge is 16m, whenever stride seven road prestressed cables 9 are set on the hollow slab bridge, the diameter of prestressed cable 9 is 15.2mm, the centre position of whenever striding hollow slab bridge is provided with prestressed cable 9 one, 1/4 and 3/4 position of whenever striding hollow slab bridge is provided with prestressed cable 9 one, then, in the span centre both sides, position apart from span centre 1m respectively is provided with prestressed cable 9 one respectively, in the span centre both sides, position apart from span centre 2m respectively is provided with prestressed cable 9 one respectively, and the design tension stress during prestressed cable 9 stretch-draw should be 60% of steel strand normal intensity.
Second step: size and the arrangement of reinforcement of determining bracket
Quantity and tension stress according to the determined external transverse prestress rope 9 of the first step, determine the size and the arrangement of reinforcement of bracket, bracket is shaped as L shaped, be coated on the outer side plate of the hollow slab bridge outside, top width is 0.3m, bottom width is 0.6m, thickness is 0.2m, side is wide to be 0.4m, inner bending resistance, shearing resistance and the local requirement for bearing capacity that produces of bracket when the bracket size should satisfy by prestressed cable 9 stretching forces, and calculate the inner arrangement of reinforcement of bracket according to the correlation formula of " Code for design of concrete structures " of national Specification.
The 3rd step: bar planting construction
A, setting-out location, according to concrete bracket size and arrangement of reinforcement quantity that the first step is determined, the arrangement of reinforcement diameter is 12mm, reinforcing bar position is determined in the side and the bottom surface setting-out of on the left side plate 2 and right side plate 4 respectively.
B, boring, after the location finishes, according to the reinforcing bar position of determining, the side of on the left side plate 2 and right side plate 4 and bottom surface boring respectively, the aperture of boring is that 14mm is than the big 2mm of bar diameter, drilling depth is 10 times of bar diameters, must guarantee during boring that rig, drill bit are surperficial vertical with side plate, guarantees that the size of aperture and hole depth is accurate.If rig stops suddenly or drill bit when not advancing in the boring procedure, illustrate that drill bit runs into reinforcing bar, can suitably misplace to avoid the inner reinforcing bar of side plate.
C, clear hole after boring finishes, are cleared up the hole of being bored, and break flour in the hole and disintegrating slag are cleaned out, and guarantee no open fire in the hole simultaneously.Staple wiping hole wall twice is used in the clear clear hole of Kong Xianyong steel brush then, dips in twice of acetone wiping with the degreasing staple at last, break flour and disintegrating slag in boring are cleaned out fully, and hole wall can be moist behind the clear hole, but must guarantee no open fire, if open fire is arranged, must dry up with hair-dryer.Clear Kong Houruo does not carry out bar planting for a long time, uses clean staple the aperture is sealed, and enters to prevent the dust or the grains of sand.
D, injecting glue at the bottom of the hole, inject bar planting glue uniformly in the hole, the injecting glue degree of depth is 80% of a hole depth; During injecting glue, must discharge by earlier that the mouth of pipe place of sebific duct is rarer glue, pass into disuse.When adopting manual injecting glue device injecting glue, whenever pull injecting glue device trigger one time, under the injecting glue device slow astern, the air in like this can tap makes the glue in the hole full, even.
E, bar planting after injecting glue finishes, should be carried out bar planting immediately, and the part in the reinforcing bar patchhole will keep dry, and cleaning does not have serious corrosion, during bar planting, reinforcing bar rotated patchhole lentamente at the bottom of, in case bubble appears, glue spills phenomenon.For guaranteeing that glue is evenly distributed, reinforcing bar should have a small amount of glue excessive after inserting, and if any bubble or with bigger Pop, illustrates that glue is unreal in the hole, again injecting glue.
F, maintenance, after bar planting finished, before the bar planting adhesive curing, the reinforcing bar of implantation must not disturbance, makes its natural curing;
The 4th step: colligation bracket reinforcing bar and pre-buried bellows 11
The side of on the left side plate 2 and right side plate 4 and bottom surface bar planting finish, and behind the curing conservation, planting colligation plain bars on the good reinforcing bar, and the template used of cast bracket is set, on middle plate 3 bottom surfaces of hollow slab bridge, install and fix suspension ring 8, bellows 11 is set in template, and the anchor plate of pre-buried prestressed cable 9 end anchorages;
The 5th step: fluid concrete
Fluid concrete in the bracket template;
The 6th step: the installation of suspension ring 8 and prestressed cable 9 are installed and stretch-draw
A, on the bottom surface of the middle plate 3 of pontic, stamp expansion bolt, and suspension ring 8 are installed;
B, protection tube 10 is installed in the suspension ring 8 of plate 3 base plates;
C, Prestressed cable 9 is passed in left bracket 1, protection tube 10 and right bracket 5, according to the design stretching force prestressed cable 9 is carried out prestressed stretch-draw then, during prestressed stretch-draw, the left end of prestressed cable 9 is fixed, right-hand member to prestressed cable 9 carries out stretch-draw, finishes the construction of the external horizontal anchoring system of hollow slab bridge.
Embodiment two:
Repeat embodiment one, following difference is arranged, present embodiment is being that the hollow slab bridge of 20m carries out the external horizontal anchoring of hollow slab bridge to span, whenever stride seven road prestressed cables 9 are set on the hollow slab bridge, the diameter of prestressed cable 9 is 15.2mm, the centre position of whenever striding hollow slab bridge is provided with prestressed cable 9 one, 1/4 and 3/4 position of whenever striding hollow slab bridge is provided with prestressed cable 9 one, then, in the span centre both sides, the position apart from span centre 1m respectively is provided with prestressed cable 9 one respectively, in the span centre both sides, position apart from span centre 2.5m respectively is provided with prestressed cable 9 one respectively
The anchoring system that the utility model provides is not only applicable to the hollow slab bridge of existing generation disease is carried out external transverse prestress reinforcing, is applicable to the newly-built assembling hollow slab bridge that external transverse prestress is set yet.
Be noted that, the above embodiment is to the explanation of technical solutions of the utility model and unrestricted, other modification that is equal to replacement or makes of affiliated technical field those of ordinary skill according to prior art, as long as do not exceed the thinking and the scope of technical solutions of the utility model, all should be included within the desired interest field of the utility model.
Claims (6)
1. external horizontal anchoring system of hollow slab bridge, it comprises left side plate (2), middle plate (3) and right side plate (4), it is characterized in that: described left side plate (2) is provided with left bracket (1), right side plate (4) is provided with right bracket (5), be provided with bellows (11) in left side bracket (1) and the right bracket (5), prestressed cable (9) is installed in the bellows (11), left side bracket (1) is connected by prestressed cable (9) with right bracket (5), prestressed cable (9) left end is fixing by left ground tackle (13) and left bracket (1), prestressed cable (9) right-hand member is fixing by right ground tackle (6) and right bracket (5), and prestressed cable (9) is connected with middle plate (3) by suspension ring (8).
2. the external horizontal anchoring system of hollow slab bridge according to claim 1, it is characterized in that: the structure of described left bracket (1) and right bracket (5) is identical, cross sectional shape is " L " type, and left bracket (1) and right bracket (5) are the steel concrete bracket.
3. the external horizontal anchoring system of hollow slab bridge according to claim 1 is characterized in that: the prestressed cable (9) that the middle plate (3) of described hollow slab bridge is corresponding is provided with protection tube (10).
4. the external horizontal anchoring system of hollow slab bridge according to claim 1 is characterized in that: described prestressed cable (9) is a un-bonded prestressed steel strand, or is finish rolling deformed bar.
5. the external horizontal anchoring system of hollow slab bridge according to claim 1, it is characterized in that: described left ground tackle (13) is arranged on the outside of left bracket (1), right ground tackle (6) is arranged on the outside of right ground tackle (6), left ground tackle (13) and right ground tackle (6) be strand tapered anchorage or/and the male cone type ground tackle or/and the supporting type ground tackle.
6. the external horizontal anchoring system of hollow slab bridge according to claim 1 or 5, it is characterized in that: be provided with left backing plate (12) between described left ground tackle (13) and the left bracket (1), be provided with right backing plate (7) between right ground tackle (6) and the right bracket (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205564050U CN201817779U (en) | 2010-10-12 | 2010-10-12 | External transverse anchoring system for hollow plate bridge body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205564050U CN201817779U (en) | 2010-10-12 | 2010-10-12 | External transverse anchoring system for hollow plate bridge body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201817779U true CN201817779U (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205564050U Expired - Lifetime CN201817779U (en) | 2010-10-12 | 2010-10-12 | External transverse anchoring system for hollow plate bridge body |
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| Country | Link |
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| CN (1) | CN201817779U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949135A (en) * | 2010-10-12 | 2011-01-19 | 郑州大学 | Transverse anchorage system outside hollow slab bridge body and construction process thereof |
| CN102286945A (en) * | 2011-08-24 | 2011-12-21 | 石家庄铁道大学 | External pre-stressed anchoring device for concrete bridge body and rapid strengthening method |
-
2010
- 2010-10-12 CN CN2010205564050U patent/CN201817779U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949135A (en) * | 2010-10-12 | 2011-01-19 | 郑州大学 | Transverse anchorage system outside hollow slab bridge body and construction process thereof |
| CN101949135B (en) * | 2010-10-12 | 2012-07-25 | 郑州大学 | Transverse anchorage system outside hollow slab bridge body and construction process thereof |
| CN102286945A (en) * | 2011-08-24 | 2011-12-21 | 石家庄铁道大学 | External pre-stressed anchoring device for concrete bridge body and rapid strengthening method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110504 Effective date of abandoning: 20120725 |