CN201169752Y - Steel structure anchoring steering system of external prestress for reinforcing old bridge - Google Patents
Steel structure anchoring steering system of external prestress for reinforcing old bridge Download PDFInfo
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- CN201169752Y CN201169752Y CNU2007203001001U CN200720300100U CN201169752Y CN 201169752 Y CN201169752 Y CN 201169752Y CN U2007203001001 U CNU2007203001001 U CN U2007203001001U CN 200720300100 U CN200720300100 U CN 200720300100U CN 201169752 Y CN201169752 Y CN 201169752Y
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Abstract
The utility model discloses an external prestressed steel structure anchorage steering system for reinforcing old bridges, which relates to a system for repairing and reinforcing prestressed concrete old bridges. The system comprises a steel structure anchorage system and a steel structure steering system, wherein, a reinforced steel plate of the steel structure anchorage system is connected with the bridge span concrete surface of an old bridge and a steel anchorage box through an anchorage bolt and pouring sealant, and the steel anchorage box is formed by an anchor plate, a diaphragm, a stiffened steel plate, a force transfer steel plate, an external cable which passes through steel tubes and so on. The steel structure steering system comprises a steel truss support and a steering device, wherein the steel truss support is formed by an upper chord member, a lower chord member, a gusset plate, a diagonal rod, a vertical rod, a web member, a stiffening plate, a base steel plate and so on; the gusset plate and the stiffening plate as well as the base steel plate are connected with the bridge span concrete surface of the old bridge through an anchorage bolt; a steering tube is externally sleeved with a through pipe and a casing pipe, and conducting wires pass through the center of the steering tube. The system has large strength, small volume and light mass; the device can be organically connected with the old bridge, and has no problems of shear breakdown of junction surfaces and late shrinkage and creep; and the construction can not interrupt the traffic.
Description
Technical field
The utility model relates to a kind of system that is applicable to the maintenance and reinforcement of the old bridge of prestressed concrete.
Background technology
Recent two decades comes more, and the traffic infrastructure construction development of China has been built a large amount of Prestressed Concrete Bridges rapidly.Through operation and use for many years, various diseases have appearred in a lot of Prestressed Concrete Bridges, part bridge even become unsafe bridge.Satisfying under the situation of not interrupting existing traffic, it is extremely important, a necessary job that these spannings are carried out maintenance and reinforcement.
Theory and practice proves, utilizing stretch-draw external prestressing steel bundle that existing Prestressed Concrete Bridges is carried out maintenance and reinforcement is a very effective reinforcement measure, this mainly is because stretch-draw external prestressing steel bundle is a kind of reinforcement means of initiative, the external loads that promptly can help structure stress, work to existing spanning increase, and then reach the internal force that improves existing structure and linear, increase structure bearing capacity, strengthen durability of structures, improve the comfort level of driving.
Implement stretch-draw external prestressing steel bundle in existing Prestressed Concrete Bridges, the anchoring diversion system is a requisite structure facility.The anchoring diversion system is to add the important structure of external prestressing steel bundle and existing concrete-bridge after the contact, utilize it with after add external prestressing steel bundle stretching force apply, be transformed into to have in the bridge span structure and go.Among the external prestressing steel Shu Jiagu of general bridge structure, the form of pouring concrete piece is afterwards made in anchoring or diversion system.Adopt anchoring or the diversion system of back pouring concrete piece as external prestressing steel bundle, following weak point is arranged: 1, system adopts concrete form, and structure can be relatively heavier, and the impost that brings to original structure is very big; 2, the bonding surface between back pouring concrete and the existing spanning concrete, difficult treatment occurs shearing resistance easily and destroys problem; 3, back pouring concrete and existing spanning difference in the concrete length of time are very big, and anchoring turns to the concrete block of usefulness to have problems such as later stage shrinkage and creep, occurs the crack easily; 4, construction period is longer, and quality is not easy control, and construction period since the needs of concrete setting health must suspend traffic the long period.
Summary of the invention
The purpose of this utility model is at above-mentioned present situation, it is big to aim to provide a kind of structural strength, little, the light weight of volume, can link together with old spanning is organic, there are not problems such as bonding surface shear failure and later stage shrinkage and creep, quality is controlled easily, and the reinforcing scene takes up room little, and the old bridge of uninterrupted traffic is reinforced and used external prestress steel structure.
The implementation of the utility model purpose is, old bridge is reinforced and is used external prestress steel structure, form by steel work anchoring system and steel work diversion system, the agent structure of steel work anchoring system is a steel anchor box, steel anchor box is by anchor plate 1, diaphragm 2, the steel plate 3 of putting more energy into, power transmission steel plate 4-1 and 4-2, steel pipe 5 and base steel plate 7 are formed, strengthen steel plate 8 usefulness crab-bolts 6 and potting compound and old bridge spanning concrete surface 9, link together with steel anchor box again, be welded with anchor plate 1 on the base steel plate 7 of steel anchor box, diaphragm 2, the steel plate 3 of putting more energy into, power transmission steel plate 4-1 and 4-2, anchor plate 1, the diaphragm 2 and the weldering external tendon of putting more energy between the steel plate 3 pass steel pipe 5
The steel work diversion system is made up of steel truss support and steering gear, the upper chord 10 of steel truss support, lower chord 11 are connected with brace 12, montant 13 and web member 14 by face interior nodes plate 15, vertical bridge is connected by flat connection gusset plate 16 with lower chord 11 to per two groups of upper chords 10, form the space truss system, near the case web face interior nodes plate 15 and 17 welding of pedestal steel plate, pedestal steel plate 17 links together by crab-bolt 6 and old bridge concrete surface 9, on the gusset plate 16 at lower chord 11 end positions places and the pedestal steel plate 17 stiffener 18 is arranged.Lower chord 11 has external tendon to pass the installing hole of hole 19 and external tendon steering gear 20 at the face interior nodes plate 16 of montant lower end position, external tendon steering gear 20 by outer tube 21, pass through the pipe 22 and steering tube 23 form, external prestressing steel bundle passes from steering tube 23 by steel bundle center line 25.
When reinforcing old bridge with the utility model, make, install the steel work anchoring system earlier: bore crab-bolt at the concrete surface 9 that has old bridge bridge span structure earlier and implant the hole, anchor into crab-bolt, strengthening opening corresponding anchor hole on the steel plate, will strengthen steel plate and old bridge spanning concrete surface 9 sticks together, the making steel anchor box with steel bonding glue, on steel anchor box base steel plate 7, bore anchor hole, steel anchor box is installed, and steel anchor box welds with steel anchor box base steel plate, the reeving of external prestressing steel bundle, stretch-draw.
Make, install the steel work diversion system again: the rod member of each support of produce in factory, gusset plate, pedestal steel plate, stiffener and the steering gear of steering gear external tendon etc.; Boring in the existing spanning concrete, pedestal Steel Plate Guide Drill anchor hole, the gusset plate that welding is connected with steel truss support rod member on the pedestal steel plate; Utilize screw rod that upper and lower chord member, montant are connected on the gusset plate 15, connection montant 13 and brace 12 are installed; External tendon steering gear 20 is installed on steering gear gusset plate 15, and gusset plate 15 and 21 welding of steering gear outer tube weld each stiffener 18, and vertical bridge is put down connection between per two steel trusss; The reeving of external prestressing steel bundle, stretch-draw.
The utlity model has following technical characterstic: realize the external prestressing steel bundle of broken line form easily, give full play to the reinforcing effect of stretch-draw external prestressing; Relative concrete block, steel work intensity is big, and volume is little, light weight; The method that adopts crab-bolt and potting compound to combine links together steel work anchoring system and existing spanning, does not have problems such as bonding surface shear failure and later stage shrinkage and creep; Steel work anchoring diversion system can be prefabricated in the factory, and quality is controlled easily, and the reinforcing scene takes up room little; Can under the prerequisite of uninterrupted traffic, construct.
Description of drawings
Fig. 1 a, b are steel work anchoring system structure master, lateral view
Fig. 2 is a steel work diversion system structural representation
Fig. 3 a, b are external prestressing steering gear structure master, lateral view
Fig. 4 is the space arrangement relation of anchoring system, diversion system and external prestressing steel bundle
The specific embodiment
With reference to Fig. 1 a, b, the steel anchor box of steel work anchoring system of the present utility model links together by strengthening steel plate 8, crab-bolt 6 and potting compound and old bridge spanning concrete surface 9, be welded with anchor plate 1, diaphragm 2 on the base steel plate 7 of steel anchor box, put more energy into steel plate 3, power transmission steel plate 4-1 and 4-2, anchor plate 1, diaphragm 2 and the weldering external tendon of putting more energy between the steel plate 3 pass steel pipe 5.
The construction size of steel anchor box designs according to the external tendon stretching force of anchoring stretch-draw, is example with the external prestressing steel bundle standard steel anchor box MX15-12 of 12 diameter 15.24mm of an anchoring:
The long 2720mm of steel anchor box (along the external prestressing trend), wide 800mm (perpendicular to external prestressing steel bundle trend and along concrete binding face direction), high 400mm (perpendicular to the concrete binding face).According to the difference of applying prestressing force size, scantling is adjusted accordingly.
Steel anchor box and old bridge spanning concrete surface 9 be connected the mode that adopts crab-bolt to combine with potting compound, standard MX15-12 steel anchor box is 56 crab-bolts of need altogether, are evenly distributed on the base steel plate 7; About single crab-bolt diameter 27mm, about long 300mm.Potting compound is between concrete surface affixing steel plate and steel anchor box base steel plate, and potting compound thickness is about 3mm.
The steel work diversion system comprises steel truss support and external tendon steering gear, with reference to Fig. 2, the upper chord 10 of steel truss support, lower chord 11 are connected with brace 12, montant 13 and web member 14 by face interior nodes plate 15, vertical bridge is connected by flat connection gusset plate 16 with lower chord 11 to per two groups of upper chords 10, forms the space truss system.Near the case web face interior nodes plate 15 and 17 welding of pedestal steel plate, pedestal steel plate 17 links together by crab-bolt 6 and old bridge concrete surface 9, thereby makes whole steel work turning rack be fixed on original spanning.The gusset plate 16 and the pedestal steel plate 17 at lower chord 11 end positions places utilize stiffener 18 to strengthen.Lower chord 11 is reserved external tendon at the face interior nodes plate 16 of montant lower end position and is passed the installing hole of hole 19 and external tendon steering gear 20.
With reference to Fig. 3 a, b, external tendon steering gear 20 by outer tube 21, pass through the pipe 22 and steering tube 23 form, external prestressing steel bundle passes from steering tube 23 by steel bundle center line 25.Steering gear is installed on the steel truss support, and its function is to realize turning to of external prestressing steel bundle, and satisfies the requirement of external prestressing steel Shu Benshen stress structure.
With reference to Fig. 4, steel work anchoring system 29, steel work diversion system 30 are arranged as shown in the figure with external prestressing steel bundle 31 spaces: the steel work anchoring system generally is positioned at the end of spanning, be the starting point of external prestressing steel bundle 31 and the end position of terminal point, external prestressing steel bundle is anchored in original spanning; The steel work diversion system is positioned at the centre position of spanning, realizes the broken line form of external prestressing steel bundle, gives full play to the effect of external prestressing steel bundle.
Reinforce old bridge with the utility model, construction technology and flow process are as follows:
1) make, install the steel work anchoring system:
1. at the concrete surface 9 that the old bridge of anchor block position chipping is installed, bore the implantation hole of crab-bolt 6 in the concrete of existing bridge span structure, anchor hole need be avoided existing reinforcing bar and steel strand in the bridge span structure;
2. clean anchor hole dust on the coagulation, implant crab-bolt 6, guarantee that crab-bolt 6 is vertical with spanning coagulation upper surface 9 in conjunction with steel bonding glue;
3. according to crab-bolt 6 physical locations, strengthen deciding anchor hole position and perforate on the steel plate 8 in the concrete surface stickup, utilize steel bonding glue will strengthen steel plate and stick on the concrete surface 9 at steel anchor box base steel plate position place, and exert pressure with reaction frame and to make affixing steel plate and spanning concrete surface 9 paste closely according to the position, hole;
4. make steel anchor box, on steel anchor box base steel plate 7, decide anchor hole position and boring, behind each crab-bolt pad, steel anchor box is installed according to the physical location of crab-bolt 6;
5. after steel anchor box installs, carry out spot welding at the tight upper cap nut of each crab-bolt and with steel anchor box base steel plate 7,
6. steel anchor box base steel plate 7 with strengthen steel plate around carry out joint seal with structure glue, reserve grout hole, from lower end grout hole low pressure low speed potting compound is pressed into space between steel anchor box steel plate and the affixing steel plate;
7. after potting compound intensity reaches, can carry out the reeving of external prestressing steel bundle 31, stretch-draw work;
2) make, install the steel work diversion system:
1. the rod member 10～14 of each support of produce in factory, gusset plate 15～16, pedestal steel plate 17, stiffener 18 and steering gear external tendon steering gear 20 etc.;
2. boring, pedestal steel plate anchor hole location, installation, encapsulating etc. in existing spanning concrete;
3. on pedestal steel plate 17, weld the gusset plate 15 that is connected with steel truss support rod member;
4. utilize screw rod that upper chord 10, lower chord 11, montant 14 are connected on the gusset plate 15, connection montant 13 and brace 12 are installed;
5. external tendon steering gear 20 is installed on steering gear gusset plate 15, gusset plate 15 and 21 welding of steering gear outer tube,
6. each stiffener 18 of weldering system, vertical bridge is put down connection between per two steel trusss;
7. the reeving of external prestressing steel bundle 31, stretch-draw.
Claims (2)
1, old bridge is reinforced and is used external prestress steel structure, it is characterized in that forming by steel work anchoring system and steel work diversion system, the agent structure of steel work anchoring system is a steel anchor box, steel anchor box is by anchor plate (1), diaphragm (2), the steel plate (3) of putting more energy into, power transmission steel plate (4-1 and 4-2), steel pipe (5) and base steel plate (7) are formed, strengthen steel plate (8) crab-bolt (6) and potting compound and old bridge spanning concrete surface (9), link together with steel anchor box again, be welded with anchor plate (1) on the base steel plate (7) of steel anchor box, diaphragm (2), the steel plate (3) of putting more energy into, power transmission steel plate (4-1 and 4-2), anchor plate (1), the weldering external tendon passes steel pipe (5) between diaphragm (2) and the steel plate of putting more energy into (3)
The steel work diversion system is made up of steel truss support and steering gear, the upper chord of steel truss support (10), lower chord (11) is by face interior nodes plate (15) and brace (12), montant (13) is connected with web member (14), vertical bridge is connected by flat connection gusset plate (16) with lower chord (11) to per two groups of upper chords (10), form the space truss system, near the case web face interior nodes plate (15) and pedestal steel plate (17) welding, pedestal steel plate (17) links together by crab-bolt (6) and old bridge concrete surface (9), on the gusset plate (16) at lower chord (11) end positions place and the pedestal steel plate (17) stiffener (18) is arranged, lower chord (11) has external tendon to pass the installing hole of hole (19) and external tendon steering gear (20) at the face interior nodes plate (16) of montant lower end position, external tendon steering gear (20) is by outer tube (21), pass through pipe (22) and steering tube (23) and form, external prestressing steel bundle passes from steering tube (23) by steel bundle center line (25).
2, old bridge according to claim 1 is reinforced and is used external prestress steel structure, it is characterized in that the long 2720mm of steel anchor box, wide 800mm, high 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203001001U CN201169752Y (en) | 2007-12-20 | 2007-12-20 | Steel structure anchoring steering system of external prestress for reinforcing old bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203001001U CN201169752Y (en) | 2007-12-20 | 2007-12-20 | Steel structure anchoring steering system of external prestress for reinforcing old bridge |
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| CN201169752Y true CN201169752Y (en) | 2008-12-24 |
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| CNU2007203001001U Expired - Lifetime CN201169752Y (en) | 2007-12-20 | 2007-12-20 | Steel structure anchoring steering system of external prestress for reinforcing old bridge |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463590B (en) * | 2007-12-20 | 2010-09-01 | 中铁大桥勘测设计院有限公司 | External prestress steel structure and reinforcing means for reinforcing old bridge |
| CN101838971B (en) * | 2009-03-17 | 2012-05-23 | 上海建泰预应力工程有限公司 | Construction method for carrying out external prestressing strengthening on bridge by transverse tensioning method |
| CN102587294A (en) * | 2012-03-28 | 2012-07-18 | 贵州路桥集团有限公司 | Single-box multi-chamber anchorage box |
| CN104233963A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Prestress-adjustable steel truss for reinforcing PSC (prestressed concrete) continuous box girder bridge and construction method |
| CN104652293A (en) * | 2015-02-01 | 2015-05-27 | 北京工业大学 | Cable-stayed bridge structure used for reinforcing PSC (Pre-stressed Concrete) continuous box girder bridge and construction method |
| CN106120576A (en) * | 2016-08-17 | 2016-11-16 | 山西交科桥梁隧道加固维护工程有限公司 | A kind of external prestressing strengthening structure of the T-shaped beam of assembled |
| CN108677756A (en) * | 2018-04-20 | 2018-10-19 | 武汉中交试验检测加固工程有限责任公司 | A kind of external prestressing anchor and its hardened system |
| CN111236049A (en) * | 2020-03-16 | 2020-06-05 | 中铁二院工程集团有限责任公司 | External prestress steering structure |
| CN115125875A (en) * | 2022-08-16 | 2022-09-30 | 浙江交工高等级公路养护有限公司 | Bridge deck load shedding and reinforcing structure and construction method |
-
2007
- 2007-12-20 CN CNU2007203001001U patent/CN201169752Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463590B (en) * | 2007-12-20 | 2010-09-01 | 中铁大桥勘测设计院有限公司 | External prestress steel structure and reinforcing means for reinforcing old bridge |
| CN101838971B (en) * | 2009-03-17 | 2012-05-23 | 上海建泰预应力工程有限公司 | Construction method for carrying out external prestressing strengthening on bridge by transverse tensioning method |
| CN102587294A (en) * | 2012-03-28 | 2012-07-18 | 贵州路桥集团有限公司 | Single-box multi-chamber anchorage box |
| CN104233963A (en) * | 2014-09-10 | 2014-12-24 | 北京工业大学 | Prestress-adjustable steel truss for reinforcing PSC (prestressed concrete) continuous box girder bridge and construction method |
| CN104233963B (en) * | 2014-09-10 | 2016-02-17 | 北京工业大学 | A kind of adjustable prestressed steel truss for reinforcing PSC Continuous Box Girder Bridge and construction method |
| CN104652293A (en) * | 2015-02-01 | 2015-05-27 | 北京工业大学 | Cable-stayed bridge structure used for reinforcing PSC (Pre-stressed Concrete) continuous box girder bridge and construction method |
| CN106120576A (en) * | 2016-08-17 | 2016-11-16 | 山西交科桥梁隧道加固维护工程有限公司 | A kind of external prestressing strengthening structure of the T-shaped beam of assembled |
| CN108677756A (en) * | 2018-04-20 | 2018-10-19 | 武汉中交试验检测加固工程有限责任公司 | A kind of external prestressing anchor and its hardened system |
| CN111236049A (en) * | 2020-03-16 | 2020-06-05 | 中铁二院工程集团有限责任公司 | External prestress steering structure |
| CN115125875A (en) * | 2022-08-16 | 2022-09-30 | 浙江交工高等级公路养护有限公司 | Bridge deck load shedding and reinforcing structure and construction method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20081224 Effective date of abandoning: 20071220 |