CN204715226U - External prestressing strengthening based on steel plate-concrete anchor block constructs - Google Patents
External prestressing strengthening based on steel plate-concrete anchor block constructs Download PDFInfo
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- CN204715226U CN204715226U CN201520367169.0U CN201520367169U CN204715226U CN 204715226 U CN204715226 U CN 204715226U CN 201520367169 U CN201520367169 U CN 201520367169U CN 204715226 U CN204715226 U CN 204715226U
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Abstract
The utility model discloses a kind of external prestressing strengthening based on steel plate-concrete anchor block structure, comprise multiple tracks to be all positioned at and to wait to reinforce the anchor structure that external prestressing steels below case beam base plate and two supply the two ends anchoring of multiple tracks external prestressing steels respectively, external prestressing steels is along vertical bridge to laying; Wait to reinforce bottom case beam base plate and be provided with two respectively for the anchor head steel plate that two anchor structures are fixing, anchor structure comprises an anchor plate and a concrete anchor block be positioned at inside anchor plate, concrete anchor block forward upper to be fixed on anchor head steel plate and its upper back with wait that reinforcing case beam base plate is connected; Multiple prestressed pore passage is provided with in concrete anchor block; Per pass external prestressing steels two ends are anchored on the anchor plate of two anchor structures respectively.The utility model structure is simple, reasonable in design and easy construction, consolidation effect are good, the problem such as can solve construction inconvenience that existing case beam external prestress strengthening method exists, consolidation effect is poor.
Description
Technical field
The utility model belongs to case beam reinforcing technique field, especially relates to a kind of external prestressing strengthening based on steel plate-concrete anchor block structure.
Background technology
China's speedway Large scale construction starts from the mid-90 in last century, current many local roads bridge has runed nearly 30 years, even reaches 40-50, has reached or close to design reference period, or there is a variety of causes and cause Structural defect and damage, all need to carry out maintenance and reinforcement.According to Second National Highway General Survey statistics, in domestic 27.8 ten thousand highway bridges, three, four classes need repairing reinforce bridge account for about 10%.Prestressed concrete continuous box girder is a kind of important form of bridge superstructure, it has, and overall performance is good, the rigidity of structure large, it is little to be out of shape, anti-seismic performance good, particularly main beam deformation line of deflection is mild, deck crack is few, road-ability is good, the features such as Large Span Bridges force request can be met, be thus used widely in the bridge engineering of highway, city and railway.
From the operation situation of built bridge, there are some comparatively typical diseases in PC Box Girder Structure.Investigation and analysis shows, due to many reasons, as reasons such as the deficiency in design, quality control on construction are not tight, the traffic volume increases day by day, even within several years, disease in various degree has just been there is afterwards in some Continuous Box Girder Bridge in the operation more than ten years, as diagonal crack and case beam underplate concrete cracking etc. appear in case beam middle span deflexion, web concrete, thus causing structural bearing capacity to decline, the durability of bridge, practicality and safety are difficult to ensure.Therefore, in order to ensure that these disease bridges can normally use, just must reinforce it, to recover the supporting capacity of bridge.
External prestressing strengthening is the good reinforcement means of currently used one.The principle of external prestressing strengthening is that the external tendon by setting up carries out stretch-draw, to improve the stress distribution of original structure, changes the internal force distribution of original structure, offsets part dead load stress, play unloading effect, thus significantly improve the supporting capacity of bridge.Existing employing external prestressing steels reinforces the reinforcing construction of case beam base plate, generally includes the structure such as anchor block and steering block.But, in vitro in prestressed reinforcement structure, external tendon is arranged in outside the main span body of bearing structure, prestressing tendon is only had an effect with beam body at anchor block and steering block place, deformation between external tendon and beam body section concrete, easy generation stress raisers phenomenon, because presstressed reinforcing steel needs to turn to, can produce loss of prestress.On the other hand, in vitro in prestressed reinforcement structure, in anchor block and steering block, any one structural failure all will cause the failure of whole reinforcement: when steering block and anchor block adopt concrete structure, easy cracking destruction under the effect of the power that steering block produces at prestressing tendon; When adopting steering block and the anchor block of steel, and concrete is reasonable and effective connection is also a key issue to steel block part, connect inconvenience and connect effect not easily to ensure, but its connection effect directly determines final consolidation effect.In addition, adopt the prestressing tendon of existing external prestressing steels anchoring structure anchoring to be usually only laid in the both sides of case beam, when case beam width is larger, be difficult to provide enough prestressing force; And if prestressing tendon is arranged in case beam when middle position, very large lateral pull can be produced again.
To sum up, there is drawback in existing external prestress strengthening method, applicable elements limited all to some extent.Thus, a kind of structure simple, reasonable in design and external prestressing strengthening based on steel plate-concrete anchor block that easy construction, consolidation effect are good structure need be designed, the problem such as effectively can solve construction inconvenience that existing case beam external prestress strengthening method exists, consolidation effect is poor, effectively can reinforce case beam.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of external prestressing strengthening based on steel plate-concrete anchor block is provided to construct, its structure is simple, reasonable in design and easy construction, consolidation effect are good, the problem such as can solve construction inconvenience that existing case beam external prestress strengthening method exists, consolidation effect is poor.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: comprise multiple tracks and be all positioned at and wait to reinforce the anchor structure that external prestressing steels below case beam base plate and two supply external prestressing steels two ends anchoring described in multiple tracks respectively, external prestressing steels described in multiple tracks is all laid in same level and it is all along waiting that the vertical bridge reinforcing case beam is to laying, two described anchor structure symmetries be laid in wait to reinforce case beam need below rear and front end, stabilization zone; Be provided with two respectively for the anchor head steel plates that two described anchor structures are fixing bottom the described base plate waiting to reinforce case beam, two described anchor head steel plates are symmetrically laid and the two is the horizontal steel plate along waiting to reinforce case beam direction across bridge and laying;
Described anchor structure comprises one and is positioned at and waits to reinforce the anchor plate below case beam and a concrete anchor block be positioned at inside anchor plate, described anchor plate is along treating that the direction across bridge of reinforcing case beam is laid and it is that described anchor plate is positioned at below anchor head steel plate and its top and is fixed on anchor head steel plate vertically to laying; Described concrete anchor block along the direction across bridge waiting to reinforce case beam lay and its be level lay, the forward upper of described concrete anchor block to be fixed on anchor head steel plate and its upper back and wait that the base plate reinforcing case beam is fastenedly connected; Be provided with multiple respectively for the prestressed pore passage that external prestressing steels described in multiple tracks passes in described concrete anchor block;
The two ends of external prestressing steels described in per pass are anchored on the anchor plate of two described anchor structures respectively.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, is characterized in that: be provided with multiple prestressed anchor respectively end of external prestressing steels described in multiple tracks being carried out to anchoring outside the anchor plate of two described anchor structures.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: between the lateral wall of described anchor plate and anchor head steel plate and between the inside wall of anchor plate and anchor head steel plate, be provided with multiple stiffened steel plates laid from left to right, multiple described stiffened steel plates all along the vertical bridge waiting to reinforce case beam to laying and its all in vertical to laying.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, is characterized in that: external prestressing steels described in multiple tracks is in evenly laying.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: be fastenedly connected by multiple crab-bolt between described anchor head steel plate and the base plate waiting to reinforce case beam, multiple described crab-bolt is quincunx laying.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: bottom described anchor head steel plate, be provided with multiple peg, multiple described peg is all positioned at inside anchor plate and it all builds in concrete anchor block, multiple described peg all in vertically to laying and its top be all weldingly fixed on anchor head steel plate.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: be fastenedly connected by multiple T-shaped pre-embedded steel slab between the upper back of described concrete anchor block and the base plate waiting to reinforce case beam, multiple described T-shaped pre-embedded steel slab all lays in level and it is all positioned in same level; The bottom of multiple described T-shaped pre-embedded steel slab is all embedded in concrete anchor block and its top and is all fixed in the base plate waiting to reinforce case beam; Be provided with horizontal reinforcement cage in described concrete anchor block, multiple described T-shaped pre-embedded steel slab is all positioned at above described horizontal reinforcement cage and it is all fastenedly connected with described horizontal reinforcement cage and is integrated.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: in described concrete anchor block, be provided with horizontal reinforcement cage, described horizontal reinforcement cage comprises multiple tracks and is all laid in upper longitudinal reinforcement in same level, multiple tracks is all laid in lower longitudinal reinforcement in same level and multiple tracks along the lateral tie waited to reinforce case beam direction across bridge and lay, lower longitudinal reinforcement described in multiple tracks is all positioned at below upper longitudinal reinforcement described in multiple tracks, the equal cuff of lateral tie described in per pass is on described in longitudinal reinforcement lower described in multiple tracks and multiple tracks outside longitudinal reinforcement, descend upper longitudinal reinforcement described in longitudinal reinforcement and multiple tracks to be fastenedly connected by lateral tie described in multiple tracks described in multiple tracks to be integrated, described upper longitudinal reinforcement and lower longitudinal reinforcement are all along waiting that the vertical bridge reinforcing case beam is to laying, and lateral tie described in multiple tracks is along waiting that the vertical bridge reinforcing case beam is to laying from front to back, lateral tie described in per pass is laid with multiple tracks in the vertical spacer bars to laying, described spacer bars is that the bar planting treated in reinforcing case beam base plate is implanted on top.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, is characterized in that: lateral tie described in multiple tracks is all laid in level, and external prestressing steels described in multiple tracks is all positioned at inside lateral tie; Lateral tie described in per pass is provided with and multiplely carries out spacing limit steel bar to lateral tie described in multiple tracks respectively, multiple described limit steel bar is isosceles trapezoid reinforcing bar, and described in multiple tracks, external prestressing steels lays respectively in limit steel bar described in multiple tracks.
The above-mentioned structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: external prestressing steels described in multiple tracks is tensioned at one end and the presstressed reinforcing steel of one end anchoring, one end of described external prestressing steels is stretching end and its other end is anchored end; In external prestressing steels described in multiple tracks, front end is the external prestressing steels of stretching end is the first presstressed reinforcing steel, in external prestressing steels described in multiple tracks, rear end is the external prestressing steels of stretching end is the second presstressed reinforcing steel, and described first presstressed reinforcing steel and described second presstressed reinforcing steel are in being laid staggeredly.
The utility model compared with prior art has the following advantages:
1, structure is simple, input cost is lower and easy construction.
2, fixed and with treat that reinforcement bridge is fastenedly connected and be integrated, arrangement property is good.
3, consolidation effect is good and practical value is high, can be according to specific needs, the beam section need reinforced at case beam is laid, the ruggedized construction of construction molding have outside neat, good endurance, stability are high and the advantage such as good economy performance, anchor plate and concrete anchor block act synergistically simultaneously, can effectively prevent because steel plate or steel concrete unilaterally destroy and makes whole reinforcing construction destroy.
4, the concentrated force that stretch-draw external prestressing steels produces is distributed to uniformly by anchor head steel plate, anchor plate and steel concrete anchoring block to be waited to reinforce on case beam, can effectively reduce stress concentration phenomenon.Simultaneously, because anchor head steel plate in the utility model and concrete anchor block can waited to reinforce dispersed placement at the bottom of case beam beam along direction across bridge, thus can the prestressing force increased by external prestressing steels be carried out dispersed along direction across bridge waiting to reinforce at the bottom of case beam beam, thus make consolidation effect better.
In sum, the utility model structure is simple, reasonable in design and easy construction, consolidation effect are good, the problem such as can solve construction inconvenience that existing case beam external prestress strengthening method exists, consolidation effect is poor.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is reinforcing view of the present utility model.
Fig. 2 is the structural representation of the utility model anchor structure.
Fig. 3 is the plane structure schematic diagram of the utility model external prestressing steels and concrete anchor block.
Fig. 4 is the structural representation of the utility model anchor head steel plate, anchor plate and stiffened steel plates.
Fig. 5 is the direction across bridge structural representation of the utility model external prestressing steels and concrete anchor block.
Fig. 6 is the superstructure schematic diagram of the utility model concrete anchor block.
Description of reference numerals:
1-wait to reinforce case beam; 2-anchor head steel plate; 3-anchor plate;
4-stiffened steel plates; 5-concrete anchor block; 6-T-shaped pre-embedded steel slab;
7-limit steel bar; 8-crab-bolt; 9-peg;
10-external prestressing steels; 11-1-upper longitudinal reinforcement; 11-2-lower longitudinal reinforcement;
11-3-lateral tie; 11-4-spacer bars; 12-prestressed anchor.
Detailed description of the invention
As shown in Figure 1, Figure 2 and Figure 3, the utility model comprises multiple tracks and is all positioned at and waits to reinforce the anchor structure that external prestressing steels 10 below case beam 1 base plate and two supply external prestressing steels 10 two ends anchoring described in multiple tracks respectively, external prestressing steels 10 described in multiple tracks is all laid in same level and it is all along waiting that the vertical bridge reinforcing case beam 1 is to laying, and two described anchor structure symmetries are laid in waits to reinforce the needing below rear and front end, stabilization zone of case beam 1.Be provided with two bottom the described base plate waiting to reinforce case beam 1 symmetrically to lay for anchor head steel plate 2, two described anchor head steel plates 2 that two described anchor structures are fixing respectively and the two is the horizontal steel plate along waiting to reinforce the laying of case beam 1 direction across bridge.
Described anchor structure comprises one and is positioned at and waits to reinforce the anchor plate 3 below case beam 1 and a concrete anchor block 5 be positioned at inside anchor plate 3, described anchor plate 3 is along treating that the direction across bridge of reinforcing case beam 1 is laid and it is that described anchor plate 3 is positioned at below anchor head steel plate 2 and its top and is fixed on anchor head steel plate 2 vertically to laying.Described concrete anchor block 5 along the direction across bridge waiting to reinforce case beam 1 lay and its be level lay, the forward upper of described concrete anchor block 5 to be fixed on anchor head steel plate 2 and its upper back and wait that the base plate reinforcing case beam 1 is fastenedly connected.Be provided with multiple respectively for the prestressed pore passage that external prestressing steels 10 described in multiple tracks passes in described concrete anchor block 5.
Described in per pass, the two ends of external prestressing steels 10 are anchored on the anchor plate 3 of two described anchor structures respectively.
In the present embodiment, outside the anchor plate 3 of two described anchor structures, be provided with multiple prestressed anchor 12 respectively end of external prestressing steels described in multiple tracks 10 being carried out to anchoring.
Further, the anchor plate 3 of two described anchor structures all have multiple respectively for the through hole that external prestressing steels 10 described in multiple tracks passes.
In the present embodiment, described anchor head steel plate 2, anchor plate 3 are all identical with the width of concrete anchor block 5.
In the present embodiment, be provided with multiple stiffened steel plates 4 laid from left to right between the lateral wall of described anchor plate 3 and anchor head steel plate 2 and between the inside wall of anchor plate 3 and anchor head steel plate 2, multiple described stiffened steel plates 4 all along the vertical bridge waiting to reinforce case beam 1 to laying and its all in vertical to laying.
Further, described stiffened steel plates 4 is right-angled triangle steel plate.In the present embodiment, the multiple described stiffened steel plates 4 that inside and outside described anchor plate 3, both sides are arranged symmetrically is laid.Multiple described stiffened steel plates 4 is in evenly laying.
In the present embodiment, the quantity that inside and outside described anchor plate 3, both sides arrange stiffened steel plates 4 is N+1, and the quantity of described external prestressing steels 10 is N road, and wherein N is positive integer and N >=3.External prestressing steels 10 described in per pass is all between adjacent two described stiffened steel plates 4.
In the present embodiment, external prestressing steels 10 described in multiple tracks is in evenly laying.
In the present embodiment, be fastenedly connected by multiple crab-bolt 8 between the base plate that case beam 1 reinforced by described anchor head steel plate 2 and waiting, multiple described crab-bolt 8 is in quincunx laying.
Meanwhile, be provided with multiple peg 9 bottom described anchor head steel plate 2, multiple described peg 9 is all positioned at inside anchor plate 3 and it all builds in concrete anchor block 5, multiple described peg 9 all in vertically to laying and its top be all weldingly fixed on anchor head steel plate 2.
Thus, described anchor head steel plate 2 is by multiple described crab-bolt 8 with multiple described peg 9 is fastening is fastened on the base plate waiting to reinforce case beam 1.
In the present embodiment, be fastenedly connected by multiple T-shaped pre-embedded steel slab 6 between the base plate that the upper back of described concrete anchor block 5 and waiting reinforces case beam 1, multiple described T-shaped pre-embedded steel slab 6 all lays in level and it is all positioned in same level.The bottom of multiple described T-shaped pre-embedded steel slab 6 is all embedded in concrete anchor block 5 and its top and is all fixed in the base plate waiting to reinforce case beam 1.Be provided with horizontal reinforcement cage in described concrete anchor block 5, multiple described T-shaped pre-embedded steel slab 6 is all positioned at above described horizontal reinforcement cage and it is all fastenedly connected with described horizontal reinforcement cage and is integrated.
Actually add man-hour, described T-shaped pre-embedded steel slab 6 is in vertically to lay and it is welded by two pieces of rectangular steel plates in vertical runs.
In the present embodiment, composition graphs 4, Fig. 5 and Fig. 6, horizontal reinforcement cage is provided with in described concrete anchor block 5, described horizontal reinforcement cage comprises multiple tracks and is all laid in upper longitudinal reinforcement 11-1 in same level, multiple tracks is all laid in lower longitudinal reinforcement 11-2 in same level and multiple tracks along the lateral tie 11-3 waiting to reinforce case beam 1 direction across bridge and lay, lower longitudinal reinforcement 11-2 described in multiple tracks is all positioned at below upper longitudinal reinforcement 11-1 described in multiple tracks, the equal cuff of lateral tie 11-3 described in per pass is on described in longitudinal reinforcement 11-2 lower described in multiple tracks and multiple tracks outside longitudinal reinforcement 11-1, descend upper longitudinal reinforcement 11-1 described in longitudinal reinforcement 11-2 and multiple tracks to be fastenedly connected by lateral tie 11-3 described in multiple tracks described in multiple tracks to be integrated.Described upper longitudinal reinforcement 11-1 and lower longitudinal reinforcement 11-2 is all along waiting that the vertical bridge reinforcing case beam 1 is to laying, and lateral tie 11-3 described in multiple tracks is along waiting that the vertical bridge reinforcing case beam 1 is to laying from front to back.Lateral tie 11-3 described in per pass being laid with multiple tracks is that the bar planting treated in reinforcing case beam 1 base plate is implanted on top in vertical the spacer bars 11-4 to laying, described spacer bars 11-4.
Further, lateral tie 11-3 described in multiple tracks all lays in level, and described in multiple tracks, external prestressing steels 10 is all positioned at inside lateral tie 11-3.Lateral tie 11-3 described in per pass is provided with and multiplely respectively spacing limit steel bar 7 is carried out to lateral tie 11-3 described in multiple tracks, multiple described limit steel bar 7 is isosceles trapezoid reinforcing bar, and described in multiple tracks, external prestressing steels 10 lays respectively in limit steel bar 7 described in multiple tracks.
In the present embodiment, multiple described T-shaped pre-embedded steel slab 6 to be all positioned at described in multiple tracks above longitudinal reinforcement 11-1 and it is all weldingly fixed on longitudinal reinforcement 11-1.
Actual when using, described horizontal reinforcement cage is fixed on by described bar planting on the base plate waiting to reinforce case beam 1, and described horizontal reinforcement cage is welded and fixed by connecting reinforcement and multiple described peg 9 and is integrated.
In the present embodiment, external prestressing steels 10 described in multiple tracks is tensioned at one end and the presstressed reinforcing steel of one end anchoring, and one end of described external prestressing steels 10 is stretching end and its other end is anchored end; In external prestressing steels 10 described in multiple tracks, front end is the external prestressing steels 10 of stretching end is the first presstressed reinforcing steel, in external prestressing steels 10 described in multiple tracks, rear end is the external prestressing steels 10 of stretching end is the second presstressed reinforcing steel, and described first presstressed reinforcing steel and described second presstressed reinforcing steel are in being laid staggeredly.
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 structure of the external prestressing strengthening based on steel plate-concrete anchor block, it is characterized in that: comprise multiple tracks and be all positioned at and wait to reinforce the anchor structure that external prestressing steels (10) below case beam (1) base plate and two supply external prestressing steels described in multiple tracks (10) two ends anchoring respectively, external prestressing steels described in multiple tracks (10) is all laid in same level and it is all along waiting that the vertical bridge reinforcing case beam (1) is to laying, two described anchor structure symmetries be laid in wait to reinforce case beam (1) need below rear and front end, stabilization zone; Be provided with two respectively for the anchor head steel plates (2) that two described anchor structures are fixing bottom the described base plate waiting to reinforce case beam (1), two described anchor head steel plates (2) are symmetrically laid and the two is the horizontal steel plate along waiting to reinforce the laying of case beam (1) direction across bridge;
Described anchor structure comprises one and is positioned at the anchor plate (3) and a concrete anchor block (5) be positioned at inside anchor plate (3) waiting to reinforce case beam (1) below, described anchor plate (3) is along treating that the direction across bridge of reinforcing case beam (1) is laid and it is vertically to laying, and described anchor plate (3) is positioned at anchor head steel plate (2) below and its top is fixed on anchor head steel plate (2); Described concrete anchor block (5) along the direction across bridge waiting to reinforce case beam (1) lay and its be level lay, the forward upper of described concrete anchor block (5) is fixed on upper and its upper back of anchor head steel plate (2) and waits that the base plate reinforcing case beam (1) is fastenedly connected; Multiple prestressed pore passage supplying external prestressing steels described in multiple tracks (10) to pass respectively is provided with in described concrete anchor block (5);
The two ends of external prestressing steels described in per pass (10) are anchored on the anchor plate (3) of two described anchor structures respectively.
2. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block according to claim 1, it is characterized in that: anchor plate (3) outside of two described anchor structures is provided with multiple prestressed anchor (12) respectively the end of external prestressing steels described in multiple tracks (10) being carried out to anchoring.
3. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block described in claim 1 or 2, it is characterized in that: between the lateral wall of described anchor plate (3) and anchor head steel plate (2) and between the inside wall of anchor plate (3) and anchor head steel plate (2), be provided with multiple stiffened steel plates (4) laid from left to right, multiple described stiffened steel plates (4) all along the vertical bridge waiting to reinforce case beam (1) to laying and its all in vertical to laying.
4. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block described in claim 1 or 2, it is characterized in that: external prestressing steels described in multiple tracks (10) is in evenly laying.
5. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block described in claim 1 or 2, it is characterized in that: be fastenedly connected by multiple crab-bolt (8) between described anchor head steel plate (2) and the base plate waiting to reinforce case beam (1), multiple described crab-bolt (8) is in quincunx laying.
6. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block described in claim 1 or 2, it is characterized in that: described anchor head steel plate (2) bottom is provided with multiple peg (9), multiple described peg (9) is all positioned at anchor plate (3) inner side and it all builds in concrete anchor block (5), and multiple described peg (9) is all in vertically to lay and its top is all weldingly fixed on anchor head steel plate (2).
7. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block described in claim 1 or 2, it is characterized in that: be fastenedly connected by multiple T-shaped pre-embedded steel slab (6) between the upper back of described concrete anchor block (5) and the base plate waiting to reinforce case beam (1), multiple described T-shaped pre-embedded steel slab (6) is all laid in level and it is all positioned in same level; The bottom of multiple described T-shaped pre-embedded steel slab (6) is all embedded in concrete anchor block (5) and its top and is all fixed in the base plate waiting to reinforce case beam (1); Be provided with horizontal reinforcement cage in described concrete anchor block (5), multiple described T-shaped pre-embedded steel slab (6) is all positioned at above described horizontal reinforcement cage and it is all fastenedly connected with described horizontal reinforcement cage and is integrated.
8. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block described in claim 1 or 2, it is characterized in that: in described concrete anchor block (5), be provided with horizontal reinforcement cage, described horizontal reinforcement cage comprises multiple tracks and is all laid in upper longitudinal reinforcement (11-1) in same level, multiple tracks is all laid in lower longitudinal reinforcement (11-2) in same level and multiple tracks along the lateral tie (11-3) waited to reinforce case beam (1) direction across bridge and lay, lower longitudinal reinforcement (11-2) described in multiple tracks is all positioned at upper longitudinal reinforcement (11-1) below described in multiple tracks, lateral tie described in per pass (11-3) all cuff goes up longitudinal reinforcement (11-1) outside described in longitudinal reinforcement (11-2) and multiple tracks down described in multiple tracks, descend upper longitudinal reinforcement (11-1) described in longitudinal reinforcement (11-2) and multiple tracks to be fastenedly connected by lateral tie described in multiple tracks (11-3) described in multiple tracks to be integrated, described upper longitudinal reinforcement (11-1) and lower longitudinal reinforcement (11-2) are all along waiting that the vertical bridge reinforcing case beam (1) is to laying, and lateral tie described in multiple tracks (11-3) is along waiting that the vertical bridge reinforcing case beam (1) is to laying from front to back, lateral tie described in per pass (11-3) is laid with multiple tracks in the vertical spacer bars (11-4) to laying, described spacer bars (11-4) is implanted for top and is waited to reinforce the bar planting in case beam (1) base plate.
9. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block according to claim 8, it is characterized in that: lateral tie described in multiple tracks (11-3) is all laid in level, external prestressing steels described in multiple tracks (10) is all positioned at lateral tie (11-3) inner side; Lateral tie described in per pass (11-3) is provided with and multiplely respectively spacing limit steel bar (7) is carried out to lateral tie described in multiple tracks (11-3), multiple described limit steel bar (7) is isosceles trapezoid reinforcing bar, and external prestressing steels described in multiple tracks (10) lays respectively in limit steel bar described in multiple tracks (7).
10. according to the structure of the external prestressing strengthening based on steel plate-concrete anchor block described in claim 1 or 2, it is characterized in that: external prestressing steels described in multiple tracks (10) is tensioned at one end and the presstressed reinforcing steel of one end anchoring, one end of described external prestressing steels (10) is stretching end and its other end is anchored end; In external prestressing steels described in multiple tracks (10), front end is the external prestressing steels (10) of stretching end is the first presstressed reinforcing steel, in external prestressing steels described in multiple tracks (10), rear end is the external prestressing steels (10) of stretching end is the second presstressed reinforcing steel, and described first presstressed reinforcing steel and described second presstressed reinforcing steel are in being laid staggeredly.
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| CN105696451B (en) * | 2016-04-07 | 2017-05-31 | 沈阳建筑大学 | The wide box girder bridge girder base arrangement and its construction method of Bottom slab breaking can be prevented |
| 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 |
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| CN108252229A (en) * | 2018-03-08 | 2018-07-06 | 山东英才学院 | A kind of anchorage zone conversion equipment for suspension cable reinforcement system |
| CN108252229B (en) * | 2018-03-08 | 2024-05-17 | 山东交通学院 | Main girder anchoring area conversion device for stay cable reinforcement system |
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| CN108286220B (en) * | 2018-03-28 | 2023-11-10 | 中铁第四勘察设计院集团有限公司 | Bearing type cable-beam anchoring structure for cable-stayed bridge concrete box Liang Sanmian compression shear |
| CN111155449A (en) * | 2020-01-10 | 2020-05-15 | 东南大学 | Prefabricated UHPC (ultra high performance concrete) anchoring tooth block for external prestress reinforcement and construction method |
| CN111622133A (en) * | 2020-05-20 | 2020-09-04 | 中国国家铁路集团有限公司 | Bridge external pre-tightening force reinforcing system and mounting method thereof |
| 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 |
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Inventor after: Ke Liangliang Inventor after: Yuan Zhuoya Inventor after: Zhao Yanhong Inventor after: Wang Changqing Inventor after: Feng Wei Inventor after: Miao Jianbao Inventor after: Shi Xiongwei Inventor after: Lei Dan Inventor after: Zhao Ting Inventor before: Shi Xiongwei Inventor before: Yuan Zhuoya Inventor before: Zhao Yanhong Inventor before: Wang Changqing Inventor before: Feng Wei Inventor before: Miao Jianbao Inventor before: Ke Liangliang Inventor before: Lei Dan Inventor before: Zhao Ting |
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Granted publication date: 20151021 Termination date: 20200531 |