CN103243661A - New-old bridge transverse reinforced steel frame for broadening modification of hollow slab bridge and construction process - Google Patents
New-old bridge transverse reinforced steel frame for broadening modification of hollow slab bridge and construction process Download PDFInfo
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- CN103243661A CN103243661A CN2013101770165A CN201310177016A CN103243661A CN 103243661 A CN103243661 A CN 103243661A CN 2013101770165 A CN2013101770165 A CN 2013101770165A CN 201310177016 A CN201310177016 A CN 201310177016A CN 103243661 A CN103243661 A CN 103243661A
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Abstract
The invention provides a new-old bridge transverse reinforced steel frame for broadening modification of a hollow slab bridge and a construction process. The hollow slab bridge is arranged longitudinally and comprises old bridge hollow slabs and new bridge hollow slabs. The new bridge hollow slabs are arranged on one side or two sides of the old bridge hollow slabs. Hinge joints are arranged among the hollow slabs. The bottom portions and the top portions of the old bridge hollow slabs and the new bridge hollow slabs are connected through transverse connecting devices arranged transversely. Each transverse connecting device comprises transverse connecting construction members connected with the bottom portions and the top portions and vertical connecting pieces of the transverse connecting construction members, wherein the vertical connecting pieces are connected with the bottom portions and the top portions. The transverse connecting construction members are reinforced steel construction members, and the reinforced steel construction members at the bottom portions of the hollow slabs are made of structural steel or steel plates. The construction process is simple and good in operability, facilitates quality control and improves construction quality and durability of broadening modification of the hollow slab bridge.
Description
Technical field
The present invention relates to the bridge field, especially relate to framework and construction technology that a kind of hollow slab bridge is widened transformation.
Background technology
Along with rapid development of economy, the traffic volume of the main speedway of China is growing, and reconstruction and extension project has become a focus of expressway construction, and wherein the assembling Supported Slab Bridge becomes the emphasis of bridge reorganization and expansion.Bridge is widened transformation can be designed to the form that new and old bridge separates, and is the main flow form of new and old hollow slab bridge splicing during China's speedway is remodeled and expand but superstructure connects, substructure does not connect.The common employing of new and old bridge upper lateral method of attachment is only mated formation, and cast-in-place wet seam connects, replaces old bridge side plate connection etc. between continuous, new and old plate.But effect is all undesirable, and new and old junction longitudinal joint and the old bridge side plate adjacent with the new bridge side plate veneer occurs and happened occasionally by force phenomenon.
Laterally connecting flimsy reason in the hollow slab bridge between new and old plate connecting portion mainly is: bigger variation has all taken place in the requirement of relevant design standard and Load value in the existing design specifications, change has also taken place in the hollowcore slab section form thereupon, the little ribbet spectacle plate that past often adopts is replaced by big ribbet single orifice plate, new panel stiffness is bigger than old plate increasing degree, and old plate is under arms in the process, because the effects such as shrinkage and creep of vehicular load and environmental activity and concrete self also can cause old panel stiffness to decline to a great extent, thereby there is larger difference in new and old panel stiffness, the load cross direction profiles is undergone mutation at new and old handing-over position, cause new and old handing-over seam to bear big shearing, can cause between new and old plate when serious to have relative displacement, and then cause that new and old plate seaming position forms the bridge floor longitudinal joint, diseases such as old bridge side plate veneer is stressed.Thereby, widen when transforming at hollow slab bridge, seeking the horizontal connection that a kind of not only economy but also the reliable method of easily going strengthen between new and old bridge is very to be necessary.
Summary of the invention
The new and old bridge that the object of the present invention is to provide a kind of hollow slab bridge to widen transformation laterally strengthens steel framework body and construction technology, improves construction quality and durability that hollow slab bridge is widened transformation.
Technical scheme of the present invention is:
The new and old bridge that hollow slab bridge is widened transformation laterally strengthens steel framework body construction technology, and hollow slab bridge is vertically arranged, comprises old bridge hollowcore slab and new bridge hollowcore slab, and the new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Be provided with the hinge seam between each hollowcore slab,
The bottom of described old bridge hollowcore slab and new bridge hollowcore slab and top are connected by the cross-connecting apparatus of horizontally set, cross-connecting apparatus comprises the horizontal connecting elements that is connected bottom and top, the vertical connector that is connected the horizontal connecting elements at bottom and top, laterally connecting elements is for strengthening the steel member, the bottom of hollowcore slab strengthens the steel member and adopts shaped steel or steel plate, the top of hollowcore slab strengthens the steel member and adopts steel plate, the place is provided with vertical connector at described hinge seam, and horizontal cross-connecting apparatus is longitudinally arranged successively;
At first, determine the road number of arranging and the hollowcore slab quantity that laterally is connected according to field condition;
One, determines the road number that cross-connecting apparatus is vertically arranged according to the rigidity of hollowcore slab, in two kinds of situation;
Two, determine the hollowcore slab quantity that cross-connecting apparatus laterally connects according to span L:
Laterally the new bridge hollowcore slab number that connects is 1 ~ 3, gets actual plate number and connect when new bridge hollowcore slab number is counted less than the plate of needs connection;
When the span of bridge was 8m, 10m, 16m and 20m, laterally the old bridge hollowcore slab number that connects was respectively 12,12,8 and 6, and when actual span is the median of above-mentioned span, but linear interpolation rounds the back as old bridge cross connecting plate piece number;
The site operation step is,
The 1st step, delimit the bridge floor reinforcing area, cut the plate top and mat formation, setting-out is holed at the hinge seam after determining to reinforce the position, checks the position, hole, and is as the criterion with actual measurement position, hole and strengthens drilling on steel member and the top steel plate in the bottom;
In the 2nd step, the removing surface of hollowcore slab top, bottom being reinforced the position is clean, with the filler levelling of strength grade greater than hollowcore slab, perhaps uses steel plate to level up, brush bonding primer and adhesive glue;
The 3rd step, bonding top steel plate;
The 4th step, delimit hollowcore slab bottom reinforcing area, the bottom strengthens the bonding plane of steel member and smears adhesive glue, and it is in place that the bottom is strengthened the steel lifting component;
The 5th step, the vertical connector in the hinge seam is installed, the steel plate at plate top and bottom are strengthened the steel member be connected with vertical connector, fill the hole of vertical connector greater than the inserts of hollowcore slab with strength grade;
The 6th step, the connecting reinforcement that recovers to mat formation, cast concrete and the asphalt layer of mating formation of mating formation.
In described the 2nd step, the filler that is used for hollowcore slab top, bottom levelling is epoxy mortar.
Described the 4th the step in, with Chain block with bottom steel plate or shaped steel hoisted in position.
In described the 5th step, described inserts is epoxy mortar.
The shaped steel of hollowcore slab bottom or steel plate and air contact surface carry out rust preventive painting, and vertical connector adopts the epoxy coating protection in the hinge seam.
The shaped steel at bottom and top or steel plate need by the designing requirement blanking and drill vertical connector to use the hole.
Span arranges the L/4 that is centered close to hollow slab bridge, L/2, the 3L/4 place in 3 roads, centre in the 5 road cross-connecting apparatus, the distance L 1=1m place at the center in all the other 2 roads and hollowcore slab two ends at 16m and following hollow slab bridge thereof.
Described vertical connector is screw rod, and the two ends band screw of screw rod also is connected with nut; The specification of the vertical screw rod that connects of hinge seam is determined according to " Code for design of steel structures " calculating with the maximum value that the old bridge that quantity is connected by horizontal connecting elements cuts with scissors in seam shearing and the new bridge hinge seam shearing.
The new and old bridge that hollow slab bridge is widened transformation laterally strengthens the connection framework, comprises the hollow slab bridge of vertical layout, and hollow slab bridge comprises old bridge hollowcore slab and new bridge hollowcore slab, and the new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Be provided with the hinge seam between each hollowcore slab, the cross-connecting apparatus that comprises horizontally set, cross-connecting apparatus comprises the horizontal connecting elements that is connected bottom and top, the vertical connector that is connected the horizontal connecting elements at bottom and top, laterally connecting elements is for strengthening the steel member, the bottom of hollowcore slab strengthens the steel member and adopts shaped steel or steel plate, the top of hollowcore slab strengthens the steel member and adopts steel plate, be drilled with hole and be provided with vertical connector at described hinge seam place, horizontal cross-connecting apparatus is longitudinally arranged successively; Cross-connecting apparatus is connected to bottom and the top of described old bridge hollowcore slab and new bridge hollowcore slab in turn;
One, determines the road number that cross-connecting apparatus is vertically arranged according to the rigidity of hollowcore slab, in two kinds of situation;
Two, determine the hollowcore slab quantity that cross-connecting apparatus laterally connects according to span L:
Laterally the new bridge hollowcore slab number that connects is 1 ~ 3, gets actual plate number and connect when new bridge hollowcore slab number is counted less than the plate of needs connection;
When the span of bridge was 8m, 10m, 16m and 20m, laterally the old bridge hollowcore slab number that connects was respectively 12,12,8 and 6, and when actual span is the median of above-mentioned span, but linear interpolation rounds the back as old bridge cross connecting plate piece number;
Construction technology of the present invention is simple, workable, be convenient to quality control, improved construction quality and durability that hollow slab bridge is widened transformation.Frame structure of the present invention is simple, and is easy to implement.
Compared with prior art, advantage of the present invention is:
1, the new and old bridge of widening transformation according to hollow slab bridge provided by the invention laterally strengthens linked system, be to arrange at new and old bridge handing-over position to strengthen lateral ties steel framework body, the hollowcore slab local stiffness of new and old bridge is connected, the lateral ties of new and old bridge and the globality of full-bridge have been strengthened, make new and old bridge collaborative work bear vehicular load, the vehicular load cross direction profiles is seamlessly transitted.
2, the present invention is specially adapted to the transformation of widening of freely-supported hollow slab bridge, can solve new and old bridge hollowcore slab because of stressed inharmonious veneer destruction of causing and the unstable technical barrier of driving.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one, is applicable to that span is the hollow slab bridge of 16m;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of the embodiment of the invention two, is applicable to that span is greater than the hollow slab bridge of 20m;
Fig. 4 is the B-B sectional view of Fig. 3.
The specific embodiment
As shown in Figure 1, the present invention adopts is that the new and old bridge that hollow slab bridge is widened transformation laterally strengthens the connection framework, and hollow slab bridge is longitudinally arranged, comprises old bridge hollowcore slab 1 and new bridge hollowcore slab 2, and new bridge hollowcore slab 2 is positioned at the left side of old bridge hollowcore slab 1; Be equipped with hinge seam 3 between each hollowcore slab.
The bottom of each hollowcore slab and top connect by horizontal connecting elements, laterally connecting elements is for strengthening the steel member, and the enhancing steel member of bottom is shaped steel or steel plate, and the enhancing steel member at top is steel plate, hinge seam place is vertically connected by screw rod 6, and the two ends band screw of screw rod 6 adds nut;
Embodiment one:
Present embodiment is applicable to that the hollow slab bridge that span L is not more than 16m widens improvement project, and as shown in Figure 1, 2, hollow slab bridge comprises old bridge and 6 new bridges that new bridge hollowcore slab 2 is formed that 12 old bridge hollowcore slabs 1 are formed.The numbering of hollowcore slab as shown in Figure 1, 2, new bridge hollowcore slab 2 be numbered S1 ~ S6, old bridge hollowcore slab 1 be numbered S7 ~ S18, adopt to (that is: 1 new bridge hollowcore slab 2 with 8 old bridge hollowcore slabs 1) plate top between S14 at S6 that steel plate 4 is connected, adopt channel-section steel 5 to connect at the bottom of the plate, the bolt 6 by passing through hinge seam 3 between plate laterally is connected steel plate 4 and 5 edges of the channel-section steel at the bottom of the plate on plate top.
Vertically arrange 5 road cross-connecting apparatus 7 altogether along spanning, wherein 0.2 ~ 0.3,0.45 ~ 0.65 L, 0.7 ~ 0.8 L of the central hollow slab bridge of 3 road cross-connecting apparatus 7 (optimum value is respectively: L/4, L/2,3L/4) locate the distance L at the center in all the other 2 roads and hollowcore slab two ends
1=0.5 ~ 1.5m place (optimum value is for laying respectively at apart from 1m place, hollowcore slab two ends), and between corresponding to per two hollowcore slabs 2 in the prepared screw-bolt hole hole, position of hinge seam.
Laterally connecting elements is screw rod 6 by vertical connector, be that the old bridge hollowcore slab 1 of S6 new bridge hollowcore slab 2 and numbering S7, S8, S9, S10, S11, S12, S13, S14 is clipped together with a block number, form an integral body, vertical connector 3 adopts screw rod 6, and the two ends band screw of screw rod 6 also is connected with nut.
May further comprise the steps during concrete the construction:
(1) determines type, specification, quantity, the length of transverse connection
According to maximum value and " Code for design of steel structures " of hollowcore slab S6 in the hinge of the S13 seam shearing, select the thickness of the type of hollowcore slab die bed steel and specification, hollowcore slab top steel plate 4;
(2) determine type, specification, the quantity of vertical connector
Laterally the vertical connector between connecting elements and the hollowcore slab is bolt 6, the specification of vertical connector is calculated definite with the maximum value that the old bridge hinge that quantity is connected by horizontal connecting elements is stitched in shearing and the new bridge hinge seam shearing according to " Code for design of steel structures ", after the specification of bolt 6 and quantity are determined, (GB50017-2003) determine top steel plate 4 length and width according to " Code for design of steel structures ";
(3) laterally connecting elements and 3 constructions of vertical connector
Delimit the bridge floor reinforcing area, cut the plate top and mat formation, setting-out is holed at hinge seam 3 after determining to reinforce the position; With the hollowcore slab top/bottom part reinforce the removing surface at position clean, with the epoxy mortar levelling of strength grade greater than hollowcore slab, brush bonding primer and adhesive glue; Bonding top steel plate 4; The bonding plane of bottom shaped steel or steel plate (present embodiment is channel-section steel 5) is smeared adhesive glue, uses the Chain block hoisted in position; Connecting screw rod 6 in the hinge seam is installed, plate top/bottom part steel member is connected with bolt.Fill the screw rod hole with strength grade greater than the epoxy mortar of hollowcore slab; The recovery connecting reinforcement of mating formation, cast concrete and the asphalt layer of mating formation of mating formation.
Embodiment two:
Present embodiment is applicable to that span L widens improvement project greater than the hollow slab bridge of 20m,
As shown in Figure 3, Figure 4, hollow slab bridge comprises old bridge and 6 new bridges that new bridge hollowcore slab 2 is formed that 12 old bridge hollowcore slabs 1 are formed.The numbering of hollowcore slab is shown in Fig. 3,4, new bridge hollowcore slab 2 be numbered S1 ~ S6, old bridge hollowcore slab 1 be numbered S7 ~ S18, adopt to (that is: 1 new bridge hollowcore slab 2 with 6 old bridge hollowcore slabs 1) plate top between S12 at S6 that steel plate 4 is connected, adopt channel-section steel 5 to connect at the bottom of the plate, the bolt 6 by passing through hinge seam 3 between plate laterally is connected steel plate 4 and 5 edges of the channel-section steel at the bottom of the plate on plate top.
Vertically arrange 7 road cross-connecting apparatus 7 altogether along spanning, respectively arrange cross-connecting apparatus 7 one at 1m place, distance two ends, evenly arrange 5 road cross-connecting apparatus 7 in all the other positions, spacing be (L-2)/6, and 2 in the prepared screw-bolt hole hole, position that hinge is stitched between corresponding to per two hollowcore slabs.
The concrete construction sequence of this example is identical with construction sequence in the example one.
To sum up, the present invention arranges along the horizontal enhancing of hollow slab bridge with the top in the hollowcore slab bottom in new and old bridge handing-over zone, position and is connected the steel member, forms framework with the vertical screw rod that is installed in the hinge seam, and new and old bridge hollowcore slab rigidity is connected; Determine laterally to strengthen vertical layout of connecting elements and the quantity of connection hollowcore slab according to hollowcore slab rigidity; Determine the horizontal model that is connected steel member and vertical connecting screw rod at hollowcore slab bottom and top according to hinge seam shearing.The lateral ties of new and old bridge and the globality of full-bridge have been strengthened by this steel framework body linked system, strengthened the transverse load distribution capability between new and old bridge, the vehicular load cross direction profiles is seamlessly transitted, can solve new and old bridge hollowcore slab because of stressed inharmonious veneer destruction of causing and the unstable technical barrier of driving.
Claims (10)
1. the hollow slab bridge new and old bridge of widening transformation laterally strengthens steel framework body construction technology, and hollow slab bridge is vertically arranged, comprises old bridge hollowcore slab and new bridge hollowcore slab, and the new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Be provided with the hinge seam between each hollowcore slab, it is characterized in that:
The bottom of described old bridge hollowcore slab and new bridge hollowcore slab and top are connected by the cross-connecting apparatus of horizontally set, cross-connecting apparatus comprises the horizontal connecting elements that is connected bottom and top, the vertical connector that is connected the horizontal connecting elements at bottom and top, laterally connecting elements is for strengthening the steel member, the bottom of hollowcore slab strengthens the steel member and adopts shaped steel or steel plate, the top of hollowcore slab strengthens the steel member and adopts steel plate, the place is provided with vertical connector at described hinge seam, and horizontal cross-connecting apparatus is longitudinally arranged successively;
At first, determine the road number of arranging and the hollowcore slab quantity that laterally is connected according to field condition;
One, determines the road number that cross-connecting apparatus is vertically arranged according to the rigidity of hollowcore slab, in two kinds of situation;
Two, determine the hollowcore slab quantity that cross-connecting apparatus laterally connects according to span L:
Laterally the new bridge hollowcore slab number that connects is 1 ~ 3, gets actual plate number and connect when new bridge hollowcore slab number is counted less than the plate of needs connection;
When the span of bridge was 8m, 10m, 16m and 20m, laterally the old bridge hollowcore slab number that connects was respectively 12,12,8 and 6, and when actual span is the median of above-mentioned span, but linear interpolation rounds the back as old bridge cross connecting plate piece number;
2. the hollow slab bridge as claimed in claim 1 new and old bridge of widening transformation laterally strengthens steel framework body construction technology, it is characterized in that:
The site operation step is,
The 1st step, delimit the bridge floor reinforcing area, cut the plate top and mat formation, setting-out is holed at the hinge seam after determining to reinforce the position, checks the position, hole, and is as the criterion with actual measurement position, hole and strengthens drilling on steel member and the top steel plate in the bottom;
In the 2nd step, the removing surface of hollowcore slab top, bottom being reinforced the position is clean, with the filler levelling of strength grade greater than hollowcore slab, perhaps uses steel plate to level up, brush bonding primer and adhesive glue;
The 3rd step, bonding top steel plate;
The 4th step, delimit hollowcore slab bottom reinforcing area, the bottom strengthens the bonding plane of steel member and smears adhesive glue, and it is in place that the bottom is strengthened the steel lifting component;
The 5th step, the vertical connector in the hinge seam is installed, the steel plate at plate top and bottom are strengthened the steel member be connected with vertical connector, fill the hole of vertical connector greater than the inserts of hollowcore slab with strength grade;
The 6th step, the connecting reinforcement that recovers to mat formation, cast concrete and the asphalt layer of mating formation of mating formation.
3. the hollow slab bridge as claimed in claim 2 new and old bridge of widening transformation laterally strengthens steel framework body construction technology, and it is characterized in that: in described the 2nd step, the filler that is used for hollowcore slab top, bottom levelling is epoxy mortar.
4. the hollow slab bridge as claimed in claim 2 new and old bridge of widening transformation laterally strengthens steel framework body construction technology, it is characterized in that: in described the 4th step, with Chain block with bottom steel plate or shaped steel hoisted in position.
5. the hollow slab bridge as claimed in claim 2 new and old bridge of widening transformation laterally strengthens steel framework body construction technology, and it is characterized in that: in described the 5th step, described inserts is epoxy mortar.
6. the hollow slab bridge as claimed in claim 1 or 2 new and old bridge of widening transformation laterally strengthens steel framework body construction technology; it is characterized in that: the shaped steel of hollowcore slab bottom or steel plate and air contact surface carry out rust preventive painting, and vertical connector adopts the epoxy coating protection in the hinge seam.
7. the hollow slab bridge as claimed in claim 1 or 2 new and old bridge of widening transformation laterally strengthens steel framework body construction technology, and it is characterized in that: the shaped steel at bottom and top or steel plate need by the designing requirement blanking and drill vertical connector to use the hole.
8. the hollow slab bridge as claimed in claim 1 or 2 new and old bridge of widening transformation laterally strengthens steel framework body construction technology, it is characterized in that: span arranges the L/4 that is centered close to hollow slab bridge, L/2, the 3L/4 place in 3 roads, centre in the 5 road cross-connecting apparatus, the distance L at the center in all the other 2 roads and hollowcore slab two ends at 16m and following hollow slab bridge thereof
1=1m place.
9. the hollow slab bridge as claimed in claim 1 or 2 new and old bridge of widening transformation laterally strengthens steel framework body construction technology, and it is characterized in that: described vertical connector is screw rod, and the two ends band screw of screw rod also is connected with nut; The specification of the vertical screw rod that connects of hinge seam is determined according to " Code for design of steel structures " calculating with the maximum value that the old bridge that quantity is connected by horizontal connecting elements cuts with scissors in seam shearing and the new bridge hinge seam shearing.
10. the hollow slab bridge new and old bridge of widening transformation laterally strengthens the connection framework, comprises the hollow slab bridge of vertical layout, and hollow slab bridge comprises old bridge hollowcore slab and new bridge hollowcore slab, and the new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Be provided with the hinge seam between each hollowcore slab, it is characterized in that: the cross-connecting apparatus that comprises horizontally set, cross-connecting apparatus comprises the horizontal connecting elements that is connected bottom and top, the vertical connector that is connected the horizontal connecting elements at bottom and top, laterally connecting elements is for strengthening the steel member, the bottom of hollowcore slab strengthens the steel member and adopts shaped steel or steel plate, the top of hollowcore slab strengthens the steel member and adopts steel plate, be drilled with hole and be provided with vertical connector at described hinge seam place, horizontal cross-connecting apparatus is longitudinally arranged successively; Cross-connecting apparatus is connected to bottom and the top of described old bridge hollowcore slab and new bridge hollowcore slab in turn;
One, determines the road number that cross-connecting apparatus is vertically arranged according to the rigidity of hollowcore slab, in two kinds of situation;
Span L need arrange at least 5 road cross-connecting apparatus at 16m and following hollow slab bridge thereof, wherein in the middle of the 0.2 ~ 0.3L that is centered close to hollow slab bridge, 0.45 ~ 0.65 L, 0.7 ~ 0.8 L place in 3 roads, the center in 2 roads in the outer part and the distance L at hollowcore slab two ends
1=0.5 ~ 1.5m place;
Two, determine the hollowcore slab quantity that cross-connecting apparatus laterally connects according to span L:
Laterally the new bridge hollowcore slab number that connects is 1 ~ 3, gets actual plate number and connect when new bridge hollowcore slab number is counted less than the plate of needs connection;
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| CN103866689A (en) * | 2014-03-30 | 2014-06-18 | 长安大学 | New bridge and old bridge connecting reinforcing structure for bridge widening |
| CN103898841A (en) * | 2014-04-23 | 2014-07-02 | 魏志新 | Hollow slab bridge reinforcing method |
| CN103911959A (en) * | 2014-04-18 | 2014-07-09 | 岩土科技股份有限公司 | Bridge hinge joint reinforcing method through transverse anchoring steel plates |
| CN105220622A (en) * | 2015-08-25 | 2016-01-06 | 张江涛 | T beam widens reinforcing construction and construction method thereof |
| CN105672144A (en) * | 2016-02-19 | 2016-06-15 | 湖南省交通规划勘察设计院 | Medium-small span old bridge reinforcement and jointing-widening structure and construction method thereof |
| CN108797389A (en) * | 2018-06-26 | 2018-11-13 | 辽宁省交通规划设计院有限责任公司 | Enhance Hollow Slab Beam Bridge lateral ties ruggedized construction and its construction method |
| CN109972536A (en) * | 2019-03-06 | 2019-07-05 | 安徽省公路桥梁工程有限公司 | The construction method of hollow slab girder reinforcing structure |
| CN112281663A (en) * | 2020-10-21 | 2021-01-29 | 广东精特建设工程有限公司 | Construction method for widening connection of upper structures of new and old bridges |
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| CN105220622A (en) * | 2015-08-25 | 2016-01-06 | 张江涛 | T beam widens reinforcing construction and construction method thereof |
| CN105672144A (en) * | 2016-02-19 | 2016-06-15 | 湖南省交通规划勘察设计院 | Medium-small span old bridge reinforcement and jointing-widening structure and construction method thereof |
| CN105672144B (en) * | 2016-02-19 | 2017-07-28 | 湖南省交通规划勘察设计院有限公司 | A kind of medium-small span bridges are reinforced with spelling wide structure and its construction method |
| CN108797389A (en) * | 2018-06-26 | 2018-11-13 | 辽宁省交通规划设计院有限责任公司 | Enhance Hollow Slab Beam Bridge lateral ties ruggedized construction and its construction method |
| CN109972536A (en) * | 2019-03-06 | 2019-07-05 | 安徽省公路桥梁工程有限公司 | The construction method of hollow slab girder reinforcing structure |
| CN109972536B (en) * | 2019-03-06 | 2020-07-10 | 安徽省公路桥梁工程有限公司 | Construction method of hollow slab beam reinforcing and strengthening structure |
| CN112281663A (en) * | 2020-10-21 | 2021-01-29 | 广东精特建设工程有限公司 | Construction method for widening connection of upper structures of new and old bridges |
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| CN103243661B (en) | 2016-04-06 |
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