CN204097888U - A kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear - Google Patents
A kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear Download PDFInfo
- Publication number
- CN204097888U CN204097888U CN201420459006.0U CN201420459006U CN204097888U CN 204097888 U CN204097888 U CN 204097888U CN 201420459006 U CN201420459006 U CN 201420459006U CN 204097888 U CN204097888 U CN 204097888U
- Authority
- CN
- China
- Prior art keywords
- steel plate
- box girder
- small box
- plug
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, comprise end steel plate, two longitudinal steel plates and two plug at end part steel plates, end steel plate and two longitudinal steel plates form the steel jacket box that is sleeved on reinforced small box girder bottom from the bottom to top, multiple tracks no-cohesive prestressed reinforcement is provided with in steel jacket box, concrete structure has been built in steel jacket box, the two ends of per pass no-cohesive prestressed reinforcement all extend out to outside plug at end part steel plate, and the two ends of per pass no-cohesive prestressed reinforcement are all provided with tension ground tackle; The sections that the two ends of no-cohesive prestressed reinforcement extend out to outside plug at end part steel plate is stretching end, stretching end is positioned at closed protective cover, be provided with prestress detection unit between tension ground tackle and plug at end part steel plate, prestress detection unit is positioned at closed protective cover.The utility model structure is simple, reasonable in design and easy construction, result of use are good, can solve the various problems that existing box girder pre-stressed reinforcement means exists.
Description
Technical field
The utility model belongs to Technology Bridge Strengthening field, is specifically related to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear.
Background technology
When bridge construction spaning middle section lower edge does not allow to occur that tensile stress or institute's tension stress transfinite, often need to carry out prestressed reinforcement, common prestressed reinforcement measure is externally pre-stressed concrete reinforcing method, the work progress of this reinforcement means is as follows: first at beam sides or bottom surface implantation belt rib reinforcement, assembling reinforcement net in bar planting again, locate prestressed reinforcement afterwards, and concreting (or laying anchor block and steering block), treat that institute's concreting reaches design strength post-stress muscle, the arrangement form of presstressed reinforcing steel is linear type or fold-line-shaped.Though above-mentioned externally pre-stressed concrete reinforcing method can play the effect of prestressed reinforcement to a certain extent, have the following disadvantages: the concrete that the first, need increase 20cm ~ 50cm at the bottom of beam side or beam newly, bridge deadweight increases more greatly and unsightly; The second, presstressed reinforcing steel is in atmosphere exposed, need regularly take measures to prevent presstressed reinforcing steel corrosion, and not easily maintenance and late maintaining are costly; Three, the power performance of newly-increased presstressed reinforcing steel is poor, the resonance effects of need take measures reduction presstressed reinforcing steel and structure; Four, presstressed reinforcing steel need be bent up anchoring according to structure stress and construction features, bend up location mainly realize by steering block, steering block and anchor block place stress comparatively concentrated; Steering block, once loosen or slippage, will produce great loss of prestress even prestressed failure; Five, very limited to the stiffness contribution of original structure.
In addition, currently used conventional steel sheet-Combined concrete reinforcement means has following defect: the first, general steel plate concrete is passive enforcement, though structural bearing capacity can be improved largely, the reverse amount of deflection of structure can not be provided, the original camber of efficient recovery can not be had; The second, easily there is steel plate insufficient rigidity etc. and cause steel plate local to upwarp or bulge in the straight band of common band prestressed steel plate and concrete composite reinforcing body anchored end, causes can not closely combining between anchoring section steel plate and concrete; 3rd, conventional prestressed reinforcement is concrete strength under anchor and reaches with regard to sealing off and covering anchorage after design strength, but once sealing off and covering anchorage, according to current prestressing force means of testing, the prestressed loss change in structure cannot Measurement accuracy; 4th, once after prestressing force sealing off and covering anchorage, even if cause loss of prestress not reach ideal effect more greatly and due to other reasons, deadweight can only be increased on foot, not easily again process, that is, after loss of prestress, not easily take other remedial measures.
To sum up, existing box girder pre-stressed reinforcement means have that difficult in maintenance, the newly-increased presstressed reinforcing steel power performance of ruggedized construction outward appearance irregularity, presstressed reinforcing steel is poor, not easily take other remedial measures after loss of prestress, cannot the problem such as effective prestress of newly-increased presstressed reinforcing steel in Accurate Determining structure.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear is provided, its structure is simple, reasonable in design and easy construction, result of use are good, can solve that difficult in maintenance, the newly-increased presstressed reinforcing steel power performance of presstressed reinforcing steel that existing box girder pre-stressed reinforcement means exists is poor, not easily take other remedial measures after loss of prestress, cannot the problem such as effective prestress of newly-increased presstressed reinforcing steel in Accurate Determining structure.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: comprise the end steel plate needed below stabilization zone being laid in reinforced small box girder, two are laid in respectively and describedly need longitudinal steel plate of the left and right sides, stabilization zone and two to be laid in the described plug at end part steel plate needing longitudinal rear and front end, stabilization zone respectively, steel plate of the described end and two described longitudinal steel plates all in vertical bridge to laying, steel plate of the described end is flat plate with longitudinal steel plate and the longitudinal length of the two is all identical with the described length of stabilization zone that needs, two described plug at end part steel plates are all laid in direction across bridge, steel plate of the described end and the base plate of reinforced small box girder are parallel laying, and two described longitudinal steel plates are parallel laying with the left and right sides web of reinforced small box girder respectively, steel plate of the described end and two described longitudinal steel plates form the steel jacket box that is sleeved on reinforced small box girder bottom from the bottom to top, two described plug at end part steel plates are respectively the closeouts of longitudinal front and back end of described steel jacket box being carried out to shutoff, multiple tracks no-cohesive prestressed reinforcement is provided with in described steel jacket box, built concrete structure in described steel jacket box, described concrete structure with reinforce small box girder and be fastenedly connected and be integrated, the two ends of no-cohesive prestressed reinforcement described in per pass all extend out to outside plug at end part steel plate, and described in per pass, the two ends of no-cohesive prestressed reinforcement are all provided with tension ground tackle, and described tension ground tackle is positioned at outside plug at end part steel plate, the sections that the two ends of described no-cohesive prestressed reinforcement extend out to outside plug at end part steel plate is stretching end, described stretching end is positioned at closed protective cover, be positioned in described closed protective cover outside plug at end part steel plate, described closed protective cover is positioned at below reinforced small box girder and it is arranged on the base plate of reinforced small box girder, be provided with prestress detection unit between described tension ground tackle and plug at end part steel plate, described prestress detection unit is laid on no-cohesive prestressed reinforcement, and described prestress detection unit is positioned at described closed protective cover.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, is characterized in that: described prestress detection unit is pressure sensor.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, is characterized in that: the length of described stretching end is 20cm ~ 70cm.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: described closed protective cover comprises support keel and is arranged on by polylith the protecting cover that the protected apron outside support keel assembles, and described support keel is fixedly mounted on the base plate of reinforced small box girder by connecting bolt.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: described closed protective cover is cube, the width of described closed protective cover is less than the length of plug at end part steel plate and its height is identical with the height of plug at end part steel plate, and the length of described closed protective cover is greater than the length of described stretching end.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: above the both sides, front and back of steel plate of the described end, be provided with floor that multiple tracks puts more energy into, put more energy on described in multiple tracks floor all in vertical bridge to laying, the structure of floor of putting more energy on described in multiple tracks is all identical with size and it is all vertical runs with end steel plate, floor of putting more energy on described in multiple tracks is all positioned at inside plug at end part steel plate and it is all fixed on the inside wall of plug at end part steel plate, and floor of putting more energy on described in multiple tracks is all vertical runs with plug at end part steel plate.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: the bottom of described plug at end part steel plate extends below end steel plate, the part be positioned at below end steel plate of described plug at end part steel plate is lower steel plate, the inside wall of described lower steel plate being provided with multiple tracks is floor of putting more energy under parallel laying, and floor of putting more energy under described in multiple tracks is all vertical runs with plug at end part steel plate.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: the quantity of floor of putting more energy under described in multiple tracks with described in multiple tracks on the put more energy into quantity of floor identical, floor of putting more energy under described in multiple tracks is laid in immediately below floor of putting more energy on described in multiple tracks respectively; Put more energy on described in the multiple tracks bottom of floor is all welded and fixed on end steel plate, and described in multiple tracks under the put more energy into top of floor be all welded and fixed on end steel plate.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: described plug at end part steel plate comprises two the upper angle steel that described longitudinal steel plate is fastenedly connected with two respectively in left and right and a lower angle steel be fastenedly connected with end steel plate, two described upper angle steel in vertical bridge to laying and described lower angle steel be direction across bridge laying, two described upper angle steel respectively longitudinal steel plate described with two are parallel laying, and described lower angle steel and end steel plate are parallel laying; The length of described upper angle steel is consistent with the width of longitudinal steel plate, described upper angle steel smooth on the web being fixed on reinforced small box girder and it is beam body fixed edge, and the another side of upper angle steel is shutoff limit and its outer end and longitudinal steel plate are fastenedly connected and are integrated; The length of described lower angle steel is consistent with the width of end steel plate, one side of described lower angle steel is smooth and on the base plate being fixed on reinforced small box girder and it is beam reinforcement limit, the another side of lower angle steel is shutoff limit and is fastenedly connected with end steel plate bottom it to be integrated, and described upper angle steel is fastenedly connected and is integrated with two respectively for the two ends, left and right, shutoff limit of described lower angle steel.
Above-mentioned a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: no-cohesive prestressed reinforcement described in multiple tracks to be all laid on same plane and its all in vertical bridge to laying, no-cohesive prestressed reinforcement described in multiple tracks be all laid in end steel plate and reinforce small box girder base plate between; No-cohesive prestressed reinforcement described in per pass is all positioned by multiple tracks spacer bars, described spacer bars by implant the bar planting of reinforcing in small box girder beam body be fixed on reinforced small box girder; Steel plate of the described end and reinforce small box girder base plate between and two described longitudinal steel plates and reinforce small box girder left and right sides web between spacing be 8cm ~ 15cm; The width of described longitudinal steel plate is 30cm ~ 50cm.
The utility model compared with prior art has the following advantages:
1, adopt steel plate-concrete to combine with no-cohesive prestressed reinforcement to reinforce small box girder, steel plate-concrete has increased considerably structural-load-carrying capacity and the rigidity of structure, effectively improves reinforcing efficiency; Reduce the reinforcing thickness of structure simultaneously, alleviate ruggedized construction weight.
2, presstressed reinforcing steel is the unbonded prestressing tendon through disposing, and antiseptic property is good, prevents the subsidiary stress because presstressed reinforcing steel and concrete structure deformation cause, safe and reliable, loss of prestress is less.
3, to be positioned at new reinforced concrete inner for newly-increased presstressed reinforcing steel, there is not vibration damping and only to shake problem, without the need to installing damping device.
4, the binding site area of ruggedized construction and former small box girder structure is comparatively large, and bar planting is even, stress relative distribution, eliminates the problem that steering block and anchor block place stress are concentrated, greatly reduces the risk that loss of prestress was even lost efficacy.
5, the steel jacket box formed by steel plate, the double template doing concreting structure when constructing, save form removal operation, easy construction is quick.
6, the closed protective cover structure adopted is simple, easy accessibility and result of use is good; can effectively ensure to be positioned at the steel beam column corrosion such as the tension ground tackle of its inside, the stretching end of no-cohesive prestressed reinforcement 4; and available protecting can be carried out to prestress detection unit; prestress detection unit is not affected by the external environment, the high and long service life of accuracy of detection.
7, adopt active enforcement mode, the reverse amount of deflection of reinforced small box girder can be provided, thus can have original camber of the added solid small box girder of efficient recovery; Be provided with prestressed stretch-draw and checkout gear simultaneously, the easy effective prestress tested out in reinforcing construction of energy, and in conjunction with institute's reinforcement bridge according to traffic-operating period, continuation stretch-draw and prestress control can be carried out after operation, can effectively solve loss of prestress change that pre existing stress ruggedized construction exists cannot Measurement accuracy once after sealing off and covering anchorage prestressing force adjustment difficulty the problem such as greatly even cannot to adjust.The bottom of plug at end part steel plate extends below end steel plate, the both sides up and down at steel plate two ends, the end are provided with floor of putting more energy into (put more energy into namely floor and under to put more energy into floor), effectively can improve the stress state of steel plate at the bottom of anchored end and the effective combination between end steel plate and concrete structure, prevent end steel plate bulge or come to nothing, thus effectively can solve the straight band of existing band prestressed steel plate and concrete composite reinforcing body anchored end easily occur steel plate insufficient rigidity etc. and cause steel plate local to upwarp or bulge problem, closely combine between anchoring section steel plate and concrete.
8, practical value is high, the ruggedized construction of institute's construction molding is specious, good endurance, stability is high, the advantage such as good economy performance and easy construction, can effectively play concrete resistance to compression and steel plate, the feature that the pull resistance of unbonded prestressing tendon is strong, and be provided with prestressed stretch-draw and checkout gear, the easy effective prestress tested out in reinforcing construction of energy, and continuation stretch-draw and prestress control can be carried out according to prestress detection result, effectively can solve the ruggedized construction outward appearance irregularity that existing box girder pre-stressed reinforcement means exists, presstressed reinforcing steel is difficult in maintenance, newly-increased presstressed reinforcing steel power performance is poor, other remedial measures are not easily taked after loss of prestress, the problems such as the effective prestress of presstressed reinforcing steel cannot be increased newly in Accurate Determining structure.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is using state reference diagram of the present utility model.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Fig. 3 is the structural representation of the utility model no-cohesive prestressed reinforcement end prestressed stretch-draw and checkout gear.
Fig. 4 is the installation position schematic diagram of the utility model tension ground tackle, pressure sensor and closed protective cover.
Fig. 5 is the superstructure schematic diagram of the utility model closed protective cover.
Fig. 6 be the utility model is put more energy into floor with under to put more energy into the installation position schematic diagram of floor.
Fig. 7 is the internal construction schematic diagram of the utility model steel jacket box.
Fig. 8 is the installation position schematic diagram of angle steel on the utility model.
Description of reference numerals:
1-end steel plate; 2-longitudinal steel plate; 3-plug at end part steel plate;
3-1-upper angle steel; 3-2-lower angle steel; 4-no-cohesive prestressed reinforcement;
5-concrete structure; 6-1-crab-bolt one; 6-2-crab-bolt two;
7-spacer bars; 8-bar planting; 9-end stiffener floor;
10-reinforce small box girder; 11-pressure sensor; 12-support keel;
13-protected apron; 14-1-floor of above putting more energy into; 14-2-under to put more energy into floor;
15-tension ground tackle.
Detailed description of the invention
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 7 and Fig. 8, the utility model comprise be laid in reinforced small box girder 10 need the end steel plate 1, two below stabilization zone to be laid in respectively describedly to need longitudinal steel plate 2 of the left and right sides, stabilization zone and two to be laid in the described plug at end part steel plate 3 needing longitudinal rear and front end, stabilization zone respectively, steel plate of the described end 1 and two described longitudinal steel plates 2 all in vertical bridge to laying, steel plate of the described end 1 is flat plate with longitudinal steel plate 2 and the longitudinal length of the two is all identical with the described length of stabilization zone that needs.Two described plug at end part steel plates 3 are all laid in direction across bridge; Steel plate of the described end 1 is parallel laying with the base plate of reinforced small box girder 10, and two described longitudinal steel plates 2 are parallel laying with the left and right sides web of reinforced small box girder 10 respectively.Steel plate of the described end 1 and two described longitudinal steel plates 2 form the steel jacket box that is sleeved on reinforced small box girder 10 bottom from the bottom to top, two described plug at end part steel plates 3 are respectively the closeouts of longitudinal front and back end of described steel jacket box being carried out to shutoff, multiple tracks no-cohesive prestressed reinforcement 4 is provided with in described steel jacket box, built concrete structure 5 in described steel jacket box, described concrete structure 5 with reinforce small box girder 10 and be fastenedly connected and be integrated.The two ends of no-cohesive prestressed reinforcement 4 described in per pass all extend out to outside plug at end part steel plate 3, and described in per pass, the two ends of no-cohesive prestressed reinforcement 4 are all provided with tension ground tackle 15, and described tension ground tackle 15 is positioned at outside plug at end part steel plate 3.The sections that the two ends of described no-cohesive prestressed reinforcement 4 extend out to outside plug at end part steel plate 3 is stretching end, described stretching end is positioned at closed protective cover, be positioned in described closed protective cover outside plug at end part steel plate 3, described closed protective cover is positioned at below reinforced small box girder 10 and it is arranged on the base plate of reinforced small box girder 10.Be provided with prestress detection unit between described tension ground tackle 15 and plug at end part steel plate 3, described prestress detection unit is laid on no-cohesive prestressed reinforcement 4, and described prestress detection unit is positioned at described closed protective cover.
During actual use, described prestress detection unit and tension ground tackle 15 form the prestressed stretch-draw and checkout gear that are laid in no-cohesive prestressed reinforcement 4 end.Described prestress detection unit is be laid in the proving ring on described stretching end.
In the present embodiment, described prestress detection unit is pressure sensor 11.In actual use procedure, detect actual prestressed stretch-draw effect by pressure sensor 11.
In the present embodiment, the length of described stretching end is 20cm ~ 70cm.
During practice of construction, can according to specific needs, the length of described stretching end be adjusted accordingly.
In the present embodiment, described closed protective cover comprises support keel 12 and is arranged on by polylith the protecting cover that the protected apron 13 outside support keel 12 assembles, and described support keel 12 is fixedly mounted on the base plate of reinforced small box girder 10 by connecting bolt.
Further, described closed protective cover is cube, and the width of described closed protective cover is less than the length of plug at end part steel plate 3 and its height is identical with the height of plug at end part steel plate 3, and the length of described closed protective cover is greater than the length of described stretching end.
In the present embodiment, the quantity of described protected apron 13 is 5,5 described protected aprons 13 are rectangular flat, 5 described protected aprons 13 are laid in the left side of support keel 12, right side, top, bottom and outside respectively, and 5 described protected aprons 13 connect to form an airtight cavity with plug at end part steel plate 3.
Composition graphs 6, floor 14-1 that multiple tracks puts more energy into is provided with above the both sides, front and back of steel plate of the described end 1, put more energy on described in multiple tracks floor 14-1 all in vertical bridge to laying, the structure of floor 14-1 of putting more energy on described in multiple tracks all identical with size and its all with end steel plate 1 in vertical runs, the floor 14-1 that puts more energy on described in multiple tracks is all positioned at inside plug at end part steel plate 3 and it is all fixed on the inside wall of plug at end part steel plate 3, put more energy on described in multiple tracks floor 14-1 all with plug at end part steel plate 3 in vertical runs.
In the present embodiment, the bottom of described plug at end part steel plate 3 extends below end steel plate 1, the part be positioned at below end steel plate 1 of described plug at end part steel plate 3 is lower steel plate, the inside wall of described lower steel plate being provided with multiple tracks is the floor 14-2 that puts more energy under parallel laying, put more energy under described in multiple tracks floor 14-2 all with plug at end part steel plate 3 in vertical runs.
In the present embodiment, the quantity of the floor 14-2 that puts more energy under described in multiple tracks with described in multiple tracks on the put more energy into quantity of floor 14-1 identical, the floor 14-2 that puts more energy under described in multiple tracks is laid in immediately below the floor 14-1 that to put more energy on described in multiple tracks respectively; Put more energy on described in the multiple tracks bottom of floor 14-1 is all welded and fixed on end steel plate 1, and described in multiple tracks under the put more energy into top of floor 14-2 be all welded and fixed on end steel plate 1.
In the present embodiment, described plug at end part steel plate 3 comprises two upper angle steel 3-1 and the lower angle steel 3-2 be fastenedly connected with end steel plate 1 that described longitudinal steel plate 2 is fastenedly connected with two respectively in left and right, two described upper angle steel 3-1 in vertical bridge to laying and described lower angle steel 3-2 be direction across bridge laying, longitudinal steel plate 2 described with two is in parallel laying respectively for two described upper angle steel 3-1, and described lower angle steel 3-2 and end steel plate 1 are in parallel laying.The length of described upper angle steel 3-1 is consistent with the width of longitudinal steel plate 2, one side of described upper angle steel 3-1 is smooth and on the web being fixed on reinforced small box girder 10 and it is beam body fixed edge, and the another side of upper angle steel 3-1 is shutoff limit and its outer end and longitudinal steel plate 2 are fastenedly connected and are integrated.The length of described lower angle steel 3-2 is consistent with the width of end steel plate 1, one side of described lower angle steel 3-2 is smooth and on the base plate being fixed on reinforced small box girder 10 and it is beam reinforcement limit, the another side of lower angle steel 3-2 is shutoff limit and is fastenedly connected with end steel plate 1 bottom it to be integrated, and described upper angle steel 3-1 is fastenedly connected and is integrated with two respectively for the two ends, left and right, shutoff limit of described lower angle steel 3-2.
In the present embodiment, steel plate of the described end 1 and reinforce small box girder 10 base plate between and two described longitudinal steel plates 2 and reinforce small box girder 10 left and right sides web between spacing be 8cm ~ 15cm.
In the present embodiment, no-cohesive prestressed reinforcement 4 described in multiple tracks to be all laid on same plane and its all in vertical bridge to laying, no-cohesive prestressed reinforcement 4 described in multiple tracks be all laid in end steel plate 1 and reinforce small box girder 10 base plate between.
In the present embodiment, no-cohesive prestressed reinforcement 4 described in multiple tracks is laid in even,
During practice of construction, multiple described on the put more energy into spacing of adjacent two being put more energy between floor 14-1 in floor 14-1 consistent with the spacing between no-cohesive prestressed reinforcement 4 described in adjacent twice.In the present embodiment, multiple described on the spacing of adjacent two being put more energy between floor 14-1 in floor 14-1 of putting more energy into be 10cm ~ 40cm, be laid with floor 14-1 that put more energy into described in adjacent twice between no-cohesive prestressed reinforcement 4.
Steel plate of the described end 1 is fastened and fixed on the base plate of reinforced small box girder 10 by multiple crab-bolt one 6-1, two described longitudinal steel plates 2 are all fastened and fixed on the left and right sides web of reinforced small box girder 10 by multiple described crab-bolt one 6-1, the beam body fixed edge of described upper angle steel 3-1 is fastened and fixed on the web of reinforced small box girder 10 by multiple crab-bolt two 6-2, and the beam body fixed edge of described lower angle steel 3-2 is fastened and fixed on the base plate of reinforced small box girder 10 by multiple described crab-bolt two 6-2.In the present embodiment, the length of described crab-bolt one 6-1 is greater than the length of crab-bolt two 6-2.
In the present embodiment, described upper angle steel 3-1 and lower angle steel 3-2 is right angle angle steel.
In the present embodiment, steel plate of the described end 1 and two described longitudinal steel plates 2 are rectangular steel plates.
In the present embodiment, the symmetrical laying of two described longitudinal steel plates 2, and two described plug at end part steel plate 3 symmetry layings in front and back.
During practice of construction, described in per pass, no-cohesive prestressed reinforcement 4 is all positioned by multiple tracks spacer bars 7, described spacer bars 7 by implant the bar planting 8 of reinforcing in small box girder 10 beam body be fixed on reinforced small box girder 10.The two ends of described no-cohesive prestressed reinforcement 4 are fixed on lower angle steel 3-2 by tension ground tackle 15.The external coating pitch of described no-cohesive prestressed reinforcement 4 or be set with plastic bushing.Meanwhile, described in per pass, no-cohesive prestressed reinforcement 4 two ends are provided with multiple tracks end stiffener floor 9, and described in multiple tracks, end stiffener floor 9 is all positioned at inside plug at end part steel plate 3.
In the present embodiment, the width of described longitudinal steel plate 2 is 30cm ~ 50cm.During practice of construction, can according to specific needs, the width of longitudinal steel plate 2 be adjusted accordingly.
Two described longitudinal steel plates 2 and the upper surface of concrete structure 5 reinforced between the web of small box girder 10 left and right sides be downward-sloping gradually from the inside to the outside and the gradient is the domatic of 1 ︰ 1.That is, shaping concrete structure 5 is built in described steel jacket box in longitudinal steel plate 2 top shape triangular chamfered at 45 °.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solutions of the utility model.
Claims (10)
1. the small box girder reinforcing construction with prestressed stretch-draw and checkout gear, it is characterized in that: comprise the end steel plate (1) needed below stabilization zone being laid in reinforced small box girder (10), two are laid in respectively and describedly need longitudinal steel plate (2) of the left and right sides, stabilization zone and two to be laid in the described plug at end part steel plate (3) needing longitudinal rear and front end, stabilization zone respectively, steel plate of the described end (1) and two described longitudinal steel plates (2) all in vertical bridge to laying, steel plate of the described end (1), is flat plate with longitudinal steel plate (2) and the longitudinal length of the two is all identical with the described length of stabilization zone that needs, two described plug at end part steel plates (3) are all laid in direction across bridge, steel plate of the described end (1) is parallel laying with the base plate of reinforced small box girder (10), and two described longitudinal steel plates (2) are parallel laying with the left and right sides web of reinforced small box girder (10) respectively, steel plate of the described end (1) and two described longitudinal steel plates (2) form the steel jacket box that is sleeved on reinforced small box girder (10) bottom from the bottom to top, two described plug at end part steel plates (3) are respectively the closeouts of longitudinal front and back end of described steel jacket box being carried out to shutoff, multiple tracks no-cohesive prestressed reinforcement (4) is provided with in described steel jacket box, built concrete structure (5) in described steel jacket box, described concrete structure (5) with reinforce small box girder (10) and be fastenedly connected and be integrated, the two ends of no-cohesive prestressed reinforcement described in per pass (4) all extend out to plug at end part steel plate (3) outside, the two ends of no-cohesive prestressed reinforcement described in per pass (4) are all provided with tension ground tackle (15), and described tension ground tackle (15) is positioned at plug at end part steel plate (3) outside, the sections that the two ends of described no-cohesive prestressed reinforcement (4) extend out to outside plug at end part steel plate (3) is stretching end, described stretching end is positioned at closed protective cover, be positioned at plug at end part steel plate (3) outside in described closed protective cover, described closed protective cover is positioned at reinforced small box girder (10) below and it is arranged on the base plate of reinforced small box girder (10), between described tension ground tackle (15) and plug at end part steel plate (3), prestress detection unit is installed, described prestress detection unit is laid on no-cohesive prestressed reinforcement (4), and described prestress detection unit is positioned at described closed protective cover.
2., according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear according to claim 1, it is characterized in that: described prestress detection unit is pressure sensor (11).
3., according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear described in claim 1 or 2, it is characterized in that: the length of described stretching end is 20cm ~ 70cm.
4. according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear described in claim 1 or 2, it is characterized in that: the protecting cover that the protected apron (13) that described closed protective cover comprises support keel (12) and is arranged on support keel (12) outside by polylith assembles, described support keel (12) is fixedly mounted on the base plate of reinforced small box girder (10) by connecting bolt.
5. according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear described in claim 1 or 2, it is characterized in that: described closed protective cover is cube, the width of described closed protective cover is less than the length of plug at end part steel plate (3) and its height is identical with the height of plug at end part steel plate (3), and the length of described closed protective cover is greater than the length of described stretching end.
6. according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear described in claim 1 or 2, it is characterized in that: above the both sides, front and back at steel plate of the described end (1), be provided with floor (14-1) that multiple tracks puts more energy into, put more energy on described in multiple tracks floor (14-1) all in vertical bridge to laying, the structure of floor (14-1) of putting more energy on described in multiple tracks all identical with size and its all with end steel plate (1) in vertical runs, floor (14-1) of putting more energy on described in multiple tracks is all positioned at plug at end part steel plate (3) inner side and it is all fixed on the inside wall of plug at end part steel plate (3), put more energy on described in multiple tracks floor (14-1) all with plug at end part steel plate (3) in vertical runs.
7. according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear according to claim 6, it is characterized in that: the bottom of described plug at end part steel plate (3) extends end steel plate (1) below, the part being positioned at end steel plate (1) below of described plug at end part steel plate (3) is lower steel plate, the inside wall of described lower steel plate being provided with multiple tracks is floor (14-2) of putting more energy under parallel laying, put more energy under described in multiple tracks floor (14-2) all with plug at end part steel plate (3) in vertical runs.
8. according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear according to claim 7, it is characterized in that: the quantity of floor of putting more energy under described in multiple tracks (14-2) with described in multiple tracks on the put more energy into quantity of floor (14-1) identical, floor (14-2) of putting more energy under described in multiple tracks is laid in immediately below floor (14-1) of putting more energy on described in multiple tracks respectively; Put more energy on described in the multiple tracks bottom of floor (14-1) is all welded and fixed on end steel plate (1), and described in multiple tracks under the put more energy into top of floor (14-2) be all welded and fixed on end steel plate (1).
9. according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear described in claim 1 or 2, it is characterized in that: described plug at end part steel plate (3) comprises two the upper angle steel (3-1) that described longitudinal steel plate (2) is fastenedly connected with two respectively in left and right and a lower angle steel (3-2) be fastenedly connected with end steel plate (1), two described upper angle steel (3-1) in vertical bridge to laying and described lower angle steel (3-2) lay in direction across bridge, two described upper angle steel (3-1) respectively longitudinal steel plate (2) described with two in parallel laying, described lower angle steel (3-2) and end steel plate (1) are in parallel laying, the length of described upper angle steel (3-1) is consistent with the width of longitudinal steel plate (2), one side of described upper angle steel (3-1) is smooth and on the web being fixed on reinforced small box girder (10) and it is beam body fixed edge, and the another side of upper angle steel (3-1) is shutoff limit and its outer end and longitudinal steel plate (2) are fastenedly connected and are integrated, the length of described lower angle steel (3-2) is consistent with the width of end steel plate (1), one side of described lower angle steel (3-2) is smooth and on the base plate being fixed on reinforced small box girder (10) and it is beam reinforcement limit, the another side of lower angle steel (3-2) is shutoff limit and is fastenedly connected with end steel plate (1) bottom it to be integrated, and described upper angle steel (3-1) is fastenedly connected and is integrated with two respectively for the two ends, left and right, shutoff limit of described lower angle steel (3-2).
10. according to a kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear described in claim 1 or 2, it is characterized in that: no-cohesive prestressed reinforcement described in multiple tracks (4) to be all laid on same plane and its all in vertical bridge to laying, no-cohesive prestressed reinforcement described in multiple tracks (4) be all laid in end steel plate (1) and reinforce small box girder (10) base plate between; No-cohesive prestressed reinforcement described in per pass (4) is all positioned by multiple tracks spacer bars (7), described spacer bars (7) by implant the bar planting (8) of reinforcing in small box girder (10) beam body be fixed on reinforced small box girder (10); Steel plate of the described end (1) and reinforce small box girder (10) base plate between and two described longitudinal steel plates (2) and reinforce small box girder (10) left and right sides web between spacing be 8cm ~ 15cm; The width of described longitudinal steel plate (2) is 30cm ~ 50cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420459006.0U CN204097888U (en) | 2014-08-14 | 2014-08-14 | A kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420459006.0U CN204097888U (en) | 2014-08-14 | 2014-08-14 | A kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204097888U true CN204097888U (en) | 2015-01-14 |
Family
ID=52266331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420459006.0U Expired - Fee Related CN204097888U (en) | 2014-08-14 | 2014-08-14 | A kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204097888U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970837A (en) * | 2016-05-31 | 2016-09-28 | 西安公路研究院 | Unbounded prestress and steel plate-concrete combined reinforcing design method of T-type beam |
| CN106087778A (en) * | 2016-05-31 | 2016-11-09 | 西安公路研究院 | The prestressing without bondn of box beam and steel plate concrete composite reinforcement method for designing |
| CN106245540A (en) * | 2016-08-30 | 2016-12-21 | 河南省交通科学技术研究院有限公司 | A kind of based on retarded adhesive prestressed bridge strengthening system and reinforcement means |
| CN113062233A (en) * | 2021-02-24 | 2021-07-02 | 山西省交通科技研发有限公司 | Pre-tensioning method prestressed steel plate-concrete reinforcing method for box girder |
-
2014
- 2014-08-14 CN CN201420459006.0U patent/CN204097888U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970837A (en) * | 2016-05-31 | 2016-09-28 | 西安公路研究院 | Unbounded prestress and steel plate-concrete combined reinforcing design method of T-type beam |
| CN106087778A (en) * | 2016-05-31 | 2016-11-09 | 西安公路研究院 | The prestressing without bondn of box beam and steel plate concrete composite reinforcement method for designing |
| CN106087778B (en) * | 2016-05-31 | 2018-03-16 | 西安公路研究院 | The prestressing without bondn of box beam and steel plate concrete composite reinforcement design method |
| CN105970837B (en) * | 2016-05-31 | 2018-03-16 | 西安公路研究院 | The prestressing without bondn of T-shaped beam and steel plate concrete composite reinforcement design method |
| CN106245540A (en) * | 2016-08-30 | 2016-12-21 | 河南省交通科学技术研究院有限公司 | A kind of based on retarded adhesive prestressed bridge strengthening system and reinforcement means |
| CN106245540B (en) * | 2016-08-30 | 2018-05-22 | 河南省交通科学技术研究院有限公司 | It is a kind of based on retarded adhesive prestressed bridge strengthening system and reinforcement means |
| CN113062233A (en) * | 2021-02-24 | 2021-07-02 | 山西省交通科技研发有限公司 | Pre-tensioning method prestressed steel plate-concrete reinforcing method for box girder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203270457U (en) | Suspension bar anchoring structure capable of initiatively reinforcing concrete tied-arch bridge | |
| CN204097888U (en) | A kind of small box girder reinforcing construction with prestressed stretch-draw and checkout gear | |
| CN103382704B (en) | Unbonded prestress of box girder or T-shaped girder, and steel-concrete combined reinforcement structure and construction method | |
| CN203361030U (en) | Box beam or T-shaped beam reinforcing structure combining unbonded pre-stress and steel plate concrete | |
| CN203923924U (en) | No. 0 section bracket prepressing device | |
| CN204715226U (en) | External prestressing strengthening based on steel plate-concrete anchor block constructs | |
| CN103088749A (en) | Deck type open shoulder arch bridge and constructing method thereof | |
| CN204000645U (en) | A kind of bridge beam body reinforcing construction prestressed stretch-draw and checkout gear | |
| CN203625790U (en) | Small box girder reinforcing structure based on steel plate-concrete and unbonded pre-stressed steel bars | |
| CN108103928A (en) | A kind of connection structure and construction method of multispan freely-supported bridge expanssion joint | |
| CN202954299U (en) | Template support structure for large-angle V-shaped pier and No.0 block of continuous rigid framework bridge | |
| CN108999088A (en) | A kind of construction method of cable-stayed bridge | |
| CN207073063U (en) | A kind of girder falling bridge structure | |
| CN104631436A (en) | Method for improving integral type bridge abutment sustaining pile stress performance by H-shaped concrete pile | |
| CN103556780A (en) | Flange buckling-preventing section steel and concrete composite beam | |
| CN103410090B (en) | A kind of suspension rod anchoring structure of active enforcement concrete bowstring arch bridge and construction method thereof | |
| CN105631190A (en) | Reinforcement method of concrete deep beam | |
| CN203144907U (en) | Large-span dual-layer bailey truss structure | |
| CN204780559U (en) | Steel construction case roof beam and concrete bridge panel combination bridge | |
| CN207143749U (en) | It is a kind of can damping multispan freely-supported bridge | |
| CN201138238Y (en) | Automobile scale of reinforced concrete structure | |
| CN204000562U (en) | The compound rigid frame bridge of a kind of vertical prestressing steel-concrete | |
| CN205557839U (en) | Brickwork infilled wall and main body frame's flexible connection mean | |
| CN204715222U (en) | A kind of external prestressing strengthening structure of pier cap beam | |
| CN107724252A (en) | Continuous box girder hanging basket cantilever method construction and close up block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20170814 |