CN103243661B - The new and old bridge that hollow slab bridge widens transformation laterally strengthens steel framework body and construction technology - Google Patents
The new and old bridge that hollow slab bridge widens transformation laterally strengthens steel framework body and construction technology Download PDFInfo
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- CN103243661B CN103243661B CN201310177016.5A CN201310177016A CN103243661B CN 103243661 B CN103243661 B CN 103243661B CN 201310177016 A CN201310177016 A CN 201310177016A CN 103243661 B CN103243661 B CN 103243661B
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Abstract
The new and old bridge that hollow slab bridge widens transformation laterally strengthens steel framework body construction technique, and hollow slab bridge is longitudinally arranged, comprise old bridge hollowcore slab and new bridge hollowcore slab, new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Hinge seam is provided with between each hollowcore slab, bottom and the top of described old bridge hollowcore slab and new bridge hollowcore slab are connected by the cross-connecting apparatus of horizontally set, cross-connecting apparatus comprise be connected to bottom and top lateral connection component, be connected bottom and the vertical connector of lateral connection component at top, lateral connection component is for strengthening steel beam column, and the bottom of hollowcore slab strengthens steel beam column and adopts shaped steel or steel plate.Construction technology of the present invention is simple, workable, be convenient to quality control, improves construction quality and durability that hollow slab bridge widens transformation.
Description
Technical field
The present invention relates to bridge field, especially relate to framework and construction technology that a kind of hollow slab bridge widens transformation.
Background technology
Along with rapid development of economy, the traffic volume of China's major highways is growing, and reconstruction and extension project has become a focus of expressway construction, and wherein assembling Supported Slab Bridge becomes the emphasis of bridge reorganization and expansion.Transformation widened by bridge can be designed to the form that new and old bridge is separated, but superstructure connects, substructure does not connect is the dominant form of new and old hollow slab bridge splicing during China's speedway is remodeled and expand.The method of attachment of new and old bridge upper lateral adopts cast-in-place wet seam between connected, new and old plate of only mating formation to connect, replace old bridge side plate connection etc. usually.But effect is all undesirable, new and old junction longitudinal joint and the old bridge side plate adjacent with new bridge side plate occur that single slab bearing phenomenon happens occasionally.
In hollow slab bridge, between new and old plate connecting portion, the flimsy reason of lateral connection is mainly: in current designs specification, the requirement of related design standard and Load value all there occurs larger change, hollowcore slab section form also there occurs change thereupon, the little ribbet spectacle plate that past often adopts is replaced by large ribbet single orifice plate, new panel stiffness is larger than old plate increasing degree, and old plate is under arms in process, because the effect 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, thus there is larger difference in new and old panel stiffness, load relieving system is undergone mutation at new and old handing-over position, new and old handing-over seam is caused to bear larger shearing, can cause time serious between new and old plate and there is relative displacement, and then cause new and old plate seaming position to form bridge floor longitudinal joint, the diseases such as old bridge side plate single slab bearing.Thus, when hollow slab bridge widens transformation, seek a kind of not only economy but also the lateral connection that easy reliable method strengthens between new and old bridge is extremely 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 widens transformation.
Technical scheme of the present invention is:
The new and old bridge that hollow slab bridge widens transformation laterally strengthens steel framework body construction technique, and hollow slab bridge is longitudinally arranged, comprise old bridge hollowcore slab and new bridge hollowcore slab, new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Hinge seam is provided with between each hollowcore slab,
Bottom and the top of described old bridge hollowcore slab and new bridge hollowcore slab are connected by the cross-connecting apparatus of horizontally set, cross-connecting apparatus comprise be connected to bottom and top lateral connection component, be connected bottom and the vertical connector of lateral connection component at top, lateral connection component is for strengthening steel beam column, the bottom of hollowcore slab strengthens steel beam column and adopts shaped steel or steel plate, the top of hollowcore slab strengthens steel beam column and adopts steel plate, be provided with vertical connector at described hinge seam place, horizontal cross-connecting apparatus is longitudinally arranged successively;
First, the hollowcore slab quantity of number of channels and the lateral connection arranged is determined according to field condition;
One, according to the number of channels that the rigidity determination cross-connecting apparatus of hollowcore slab is longitudinally arranged, in two kinds of situation;
Span L need arrange at least 5 road cross-connecting apparatus at 16m and following hollow slab bridge thereof, 0.2 ~ the 0.3L being centrally located at hollow slab bridge, the 0.45 ~ 0.65L in 3 roads, 0.7 ~ 0.8L place wherein, the center in 2 roads in the outer part and the distance L1=0.5 at hollowcore slab two ends ~ 1.5m place;
Span L need arrange at least 7 road horizontal strokes 1 to linkage at the hollow slab bridge of more than 16m, at the distance each layout in L1=0.5 ~ 1.5m place, two ends one cross-connecting apparatus, be evenly arranged 5 road cross-connecting apparatus in all the other positions, spacing is (L-L1)/6 ± 0.05L;
Two, the hollowcore slab quantity of cross-connecting apparatus lateral connection is determined according to span L:
The new bridge hollowcore slab number of lateral connection is 1 ~ 3 piece, gets actual plate number connect when new bridge hollowcore slab number is less than the plate number of needs connection;
When the span of bridge is 8m, 10m, 16m and 20m, the old bridge hollowcore slab number of lateral connection is respectively 12 pieces, 12 pieces, 8 pieces and 6 pieces, when actual span is the median of above-mentioned span, can linear interpolation round rear as old bridge lateral connection plate number;
When the span of bridge is at more than 20m, the old bridge hollowcore slab number of lateral connection is 6 pieces, gets actual plate number connect when old bridge hollowcore slab number is less than the plate number of needs connection.
Site operation step is,
1st step, delimit Deck Consolidation region, cuts plate top and mat formation, and setting-out is determined to reinforce behind position and holed at hinge seam, checks position, hole, and to be as the criterion drilling on bottom enhancing steel beam column and top steel plate survey position, hole;
2nd step, the removing surface at hollowcore slab top, reinforcing position, bottom is clean, and the filler being greater than hollowcore slab with strength grade is levelling, or uses steel plate to level up, brush bonding primer and adhesive glue;
3rd step, bonding top steel plate;
4th step, delimit reinforcing area bottom hollowcore slab, and the bonding plane that bottom strengthens steel beam column smears adhesive glue, bottom is strengthened steel beam column hoisted in position;
5th step, installs the vertical connector in hinge seam, the steel plate at plate top and bottom is strengthened the vertical connector of steel beam column and is connected, and fills the hole of vertical connector with the inserts that strength grade is greater than hollowcore slab;
6th step, recovers to mat formation connecting reinforcement, and cast is mated formation concrete asphalt pave-load layer.
In the 2nd described step, be epoxy mortar for the filler levelling to hollowcore slab top, bottom.
In the 4th described step, with Chain block by bottom steel plate or shaped steel hoisted in position.
In the 5th described step, described inserts is epoxy mortar.
Shaped steel bottom hollowcore slab or steel plate and air contact surfaces carry out rust preventive painting, and in hinge seam, vertical connector adopts epoxy coating protection.
Bottom and the shaped steel at top or steel plate need drill vertical connector hole by designing requirement blanking.
Span arranges L/4, L/2,3L/4 place being centrally located at hollow slab bridge in the road, centre 3 in 5 road cross-connecting apparatus at 16m and following hollow slab bridge thereof, the center in all the other 2 roads and the distance L1=1m place at hollowcore slab two ends.
Described vertical connector is screw rod, and two end band screws of screw rod are also connected with nut; The old bridge hinge seam shearing that the specification of the vertical screw rod connected of hinge seam and quantity are connected by lateral connection component and the new bridge maximum value of cutting with scissors in seam shearing calculate according to " Code for design of steel structures " to be determined.
The new and old bridge that hollow slab bridge widens transformation laterally strengthens connection framework, and comprise the hollow slab bridge longitudinally arranged, hollow slab bridge comprises old bridge hollowcore slab and new bridge hollowcore slab, and new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Hinge seam is provided with between each hollowcore slab, comprise the cross-connecting apparatus of horizontally set, cross-connecting apparatus comprise be connected to bottom and top lateral connection component, be connected bottom and the vertical connector of lateral connection component at top, lateral connection component is for strengthening steel beam column, the bottom of hollowcore slab strengthens steel beam column and adopts shaped steel or steel plate, the top of hollowcore slab strengthens steel beam column and adopts steel plate, be drilled with hole at described hinge seam place and be provided with vertical connector, 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, according to the number of channels that the rigidity determination cross-connecting apparatus of hollowcore slab is longitudinally arranged, in two kinds of situation;
Span L need arrange at least 5 road cross-connecting apparatus at 16m and following hollow slab bridge thereof, the 0.2 ~ 0.3L being centrally located at hollow slab bridge, the 0.45 ~ 0.65L in 3 roads, 0.7 ~ 0.8L place wherein, the center in 2 roads in the outer part and the distance L at hollowcore slab two ends
1=0.5 ~ 1.5m place;
Span L need arrange at least 7 road cross-connecting apparatus at the hollow slab bridge of more than 16m, at distance two ends L
1the each layout in=0.5 ~ 1.5m place one cross-connecting apparatus, is evenly arranged 5 road cross-connecting apparatus in all the other positions, spacing is (L-L
1)/6 ± 0.05L;
Two, the hollowcore slab quantity of cross-connecting apparatus lateral connection is determined according to span L:
The new bridge hollowcore slab number of lateral connection is 1 ~ 3 piece, gets actual plate number connect when new bridge hollowcore slab number is less than the plate number of needs connection;
When the span of bridge is 8m, 10m, 16m and 20m, the old bridge hollowcore slab number of lateral connection is respectively 12 pieces, 12 pieces, 8 pieces and 6 pieces, when actual span is the median of above-mentioned span, can linear interpolation round rear as old bridge lateral connection plate number;
When the span of bridge is at more than 20m, the old bridge hollowcore slab number of lateral connection is 6 pieces, gets actual plate number connect when old bridge hollowcore slab number is less than the plate number of needs connection.
Construction technology of the present invention is simple, workable, be convenient to quality control, improves construction quality and durability that hollow slab bridge widens transformation.Frame structure of the present invention is simple, easy to implement.
Compared with prior art, advantage of the present invention is:
1, the new and old bridge widening transformation according to hollow slab bridge provided by the invention laterally strengthens linked system, 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, strengthen the lateral ties of new and old bridge and the globality of full-bridge, enable new and old bridge collaborative work bear vehicular load, vehicular load cross direction profiles is seamlessly transitted.
2, the present invention is specially adapted to the widen and rebuild of freely-supported hollow slab bridge, can solve new and old bridge hollowcore slab because of the technical barrier that the stressed inharmonious veneer caused destroys and driving is unstable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one, is applicable to the hollow slab bridge that span is 16m;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of the embodiment of the present invention two, is applicable to the hollow slab bridge that span is greater than 20m;
Fig. 4 is the B-B sectional view of Fig. 3.
Detailed description of the invention
As shown in Figure 1, what the present invention adopted is the new and old bridge laterally enhancing connection framework that hollow slab bridge widens transformation, 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; Hinge seam 3 is equipped with between each hollowcore slab.
The bottom of each hollowcore slab and top are connected by lateral connection component, lateral connection component is for strengthening steel beam column, and the enhancing steel beam column of bottom is shaped steel or steel plate, and the enhancing steel beam column at top is steel plate, hinge seam place is vertically connected by screw rod 6, and two end band screws of screw rod 6 add nut;
Embodiment one:
The present embodiment is applicable to the hollow slab bridge that span L is not more than 16m and widens improvement project, and as shown in Figure 1, 2, hollow slab bridge comprises old bridge that 12 pieces of old bridge hollowcore slabs 1 form and the new bridge that 6 pieces of new bridge hollowcore slabs 2 form.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, between S6 to S14, (that is: 1 piece of new bridge hollowcore slab 2 and 8 pieces of old bridge hollowcore slabs 1) plate top adopts steel plate 4 to be connected, adopts at the bottom of plate channel-section steel 5 to connect, and is transversely connected by the channel-section steel 5 at the bottom of the steel plate 4 on plate top and plate by passing through the bolt 6 cutting with scissors seam 3 between plate.
Longitudinally 5 road cross-connecting apparatus 7 are arranged altogether along spanning, wherein 0.2 ~ the 0.3L being centrally located at hollow slab bridge, the 0.45 ~ 0.65L of 3 road cross-connecting apparatus 7,0.7 ~ 0.8L place (optimum value is respectively: L/4, L/2,3L/4) place, the center in all the other 2 roads and the distance L at hollowcore slab two ends
1=0.5 ~ 1.5m place (optimum value is for laying respectively at distance 1m place, hollowcore slab two ends), and corresponding to 2, the prepared screw-bolt hole hole, position of cutting with scissors seam between every two pieces of hollowcore slabs.
Lateral connection component is by vertical connector and screw rod 6, be that S6 new bridge hollowcore slab 2 is clipped together with the old bridge hollowcore slab 1 of numbering S7, S8, S9, S10, S11, S12, S13, S14 by a block number, form an entirety, vertical connector adopts screw rod 6, and two end band screws of screw rod 6 are also connected with nut.
Comprise the following steps during Specific construction:
(1) type of transverse connection, specification, quantity, length is determined
According to the maximum value in the hinge of hollowcore slab S6 to S13 seam shearing and " Code for design of steel structures ", select the thickness of the type of hollowcore slab die bed steel and specification, hollowcore slab top steel plate 4;
(2) type, specification, the quantity of vertical connector is determined
Vertical connector between lateral connection component and hollowcore slab is bolt 6, the old bridge that the specification of vertical connector and quantity are connected by the lateral connection component maximum value of cutting with scissors in seam shearing and new bridge hinge seam shearing calculates according to " Code for design of steel structures " to be determined, after the specification of bolt 6 and quantity are determined, determine top steel plate 4 length and width according to " Code for design of steel structures " (GB50017-2003);
(3) lateral connection component and the construction of vertical connector
Delimit Deck Consolidation region, cut plate top and mat formation, hole at hinge seam 3 after setting-out determines to reinforce position; Clean, be greater than hollowcore slab with strength grade the epoxy mortar of removing surface hollowcore slab top/bottom part being reinforced position is levelling, brush bonding primer and adhesive glue; Bonding top steel plate 4; The bonding plane of bottom shaped steel or steel plate (the present embodiment is channel-section steel 5) smears adhesive glue, uses Chain block hoisted in position; Connecting screw rod 6 in hinge seam is installed, plate top/bottom part steel beam column bolt is connected.The epoxy mortar being greater than hollowcore slab with strength grade fills screw rod hole; Recovery is mated formation connecting reinforcement, and cast is mated formation concrete asphalt pave-load layer.
Embodiment two:
The present embodiment is applicable to the hollow slab bridge that span L is greater than 20m and widens improvement project,
As shown in Figure 3, Figure 4, hollow slab bridge comprises the old bridge of 12 pieces of old bridge hollowcore slabs 1 compositions and the new bridge of 6 pieces of new bridge hollowcore slab 2 compositions.The numbering of hollowcore slab as shown in Figure 3,4, new bridge hollowcore slab 2 be numbered S1 ~ S6, old bridge hollowcore slab 1 be numbered S7 ~ S18, between S6 to S12, (that is: 1 piece of new bridge hollowcore slab 2 and 6 pieces of old bridge hollowcore slabs 1) plate top adopts steel plate 4 to be connected, adopts at the bottom of plate channel-section steel 5 to connect, and is transversely connected by the channel-section steel 5 at the bottom of the steel plate 4 on plate top and plate by passing through the bolt 6 cutting with scissors seam 3 between plate.
Longitudinally 7 road cross-connecting apparatus 7 are arranged altogether along spanning, at the distance each layout in 1m place, two ends one cross-connecting apparatus 7,5 road cross-connecting apparatus 7 are evenly arranged in all the other positions, spacing is (L-2)/6, and is corresponding to 2, the prepared screw-bolt hole hole, position of cutting with scissors seam between every two pieces of hollowcore slabs.
S6, S7, S8, S9, S10, S11 and S12, by bolt 6, clip together, form an entirety by steel plate 4 and channel-section steel 5.
This example Specific construction step is identical with the construction sequence in example one.
To sum up, the present invention is connected steel beam column with the enhancing that top is arranged along hollow slab bridge transverse direction bottom the hollowcore slab of new and old bridge handing-over area, cuts with scissors the vertical screw rod in stitching and forms framework, by integral for new and old bridge hollowcore slab rigid connecting with being arranged on; The longitudinal direction determining laterally to strengthen connecting elements according to hollowcore slab rigidity arranges the quantity be connected hollowcore slab; Stitch bottom shearing determination hollowcore slab and the model of the lateral connection steel beam column at top and vertical connecting screw rod according to hinge.The lateral ties of new and old bridge and the globality of full-bridge is strengthened by this steel framework body linked system, enhance the transverse load distribution capability between new and old bridge, vehicular load cross direction profiles is seamlessly transitted, new and old bridge hollowcore slab can be solved because of the technical barrier that the stressed inharmonious veneer caused destroys and driving is unstable.
Claims (7)
1. hollow slab bridge widens the new and old bridge laterally enhancing steel framework body construction technique of transformation, and hollow slab bridge is longitudinally arranged, comprise old bridge hollowcore slab and new bridge hollowcore slab, new bridge hollowcore slab is positioned at the one or both sides of old bridge hollowcore slab; Be provided with hinge seam between each hollowcore slab, it is characterized in that:
Bottom and the top of described old bridge hollowcore slab and new bridge hollowcore slab are connected by the cross-connecting apparatus of horizontally set, cross-connecting apparatus comprise be connected to bottom and top lateral connection component, be connected bottom and the vertical connector of lateral connection component at top, lateral connection component is for strengthening steel beam column, the bottom of hollowcore slab strengthens steel beam column and adopts shaped steel or steel plate, the top of hollowcore slab strengthens steel beam column and adopts steel plate, be provided with vertical connector at described hinge seam place, horizontal cross-connecting apparatus is longitudinally arranged successively;
First, the hollowcore slab quantity of number of channels and the lateral connection arranged is determined according to field condition;
One, according to the number of channels that the rigidity determination cross-connecting apparatus of hollowcore slab is longitudinally arranged, in two kinds of situation;
Span L need arrange at least 5 road cross-connecting apparatus at 16m and following hollow slab bridge thereof, the 0.2 ~ 0.3L being centrally located at hollow slab bridge, the 0.45 ~ 0.65L in 3 roads, 0.7 ~ 0.8L place wherein, the center in 2 roads in the outer part and the distance L at hollowcore slab two ends
1=0.5 ~ 1.5m place;
Span L need arrange at least 7 road cross-connecting apparatus at the hollow slab bridge of more than 16m, at distance two ends L
1the each layout in=0.5 ~ 1.5m place one cross-connecting apparatus, is evenly arranged 5 road cross-connecting apparatus in all the other positions, spacing is (L-L
1)/6 ± 0.05L;
Two, the hollowcore slab quantity of cross-connecting apparatus lateral connection is determined according to span L:
The new bridge hollowcore slab number of lateral connection is 1 ~ 3 piece, gets actual plate number connect when new bridge hollowcore slab number is less than the plate number of needs connection;
When the span of bridge is 8m, 10m, 16m and 20m, the old bridge hollowcore slab number of lateral connection is respectively 12 pieces, 12 pieces, 8 pieces and 6 pieces, when actual span is the median of above-mentioned span, can linear interpolation round rear as old bridge lateral connection plate number;
When the span of bridge is greater than 20m, the old bridge hollowcore slab number of lateral connection is 6 pieces, gets actual plate number connect when old bridge hollowcore slab number is less than the plate number of needs connection;
Site operation step is,
1st step, delimit Deck Consolidation region, cuts plate top and mat formation, and setting-out is determined to reinforce behind position and holed at hinge seam, checks position, hole, and to be as the criterion drilling on bottom enhancing steel beam column and top steel plate survey position, hole;
2nd step, the removing surface at hollowcore slab top, reinforcing position, bottom is clean, and the filler being greater than hollowcore slab with strength grade is levelling, or uses steel plate to level up, brush bonding primer and adhesive glue;
3rd step, bonding top steel plate;
4th step, delimit reinforcing area bottom hollowcore slab, and the bonding plane that bottom strengthens steel beam column smears adhesive glue, bottom is strengthened steel beam column hoisted in position;
5th step, installs the vertical connector in hinge seam, the steel plate at plate top and bottom is strengthened the vertical connector of steel beam column and is connected, and fills the hole of vertical connector with the inserts that strength grade is greater than hollowcore slab;
6th step, recovers to mat formation connecting reinforcement, and cast is mated formation concrete asphalt pave-load layer;
Span arranges L/4, L/2,3L/4 place being centrally located at hollow slab bridge in the road, centre 3 in 5 road cross-connecting apparatus at 16m and following hollow slab bridge thereof, the center in all the other 2 roads and the distance L at hollowcore slab two ends
1=1m place.
2. the new and old bridge that hollow slab bridge as claimed in claim 1 widens transformation laterally strengthens steel framework body construction technique, it is characterized in that: in the 2nd described step, is epoxy mortar for the filler levelling to hollowcore slab top, bottom.
3. hollow slab bridge as claimed in claim 1 widens the new and old bridge laterally enhancing steel framework body construction technique of transformation, it is characterized in that: in the 4th described step, with Chain block by bottom steel plate or shaped steel hoisted in position.
4. hollow slab bridge as claimed in claim 1 widens the new and old bridge laterally enhancing steel framework body construction technique of transformation, it is characterized in that: in the 5th described step, described inserts is epoxy mortar.
5. the new and old bridge that hollow slab bridge as claimed in claim 1 widens transformation laterally strengthens steel framework body construction technique, and it is characterized in that: the shaped steel bottom hollowcore slab or steel plate carry out rust preventive painting with air contact surfaces, in hinge seam, vertical connector adopts epoxy coating protection.
6. the new and old bridge that hollow slab bridge as claimed in claim 1 widens transformation laterally strengthens steel framework body construction technique, it is characterized in that: the shaped steel at bottom and top or steel plate need drill vertical connector hole by designing requirement blanking.
7. the new and old bridge that hollow slab bridge as claimed in claim 1 widens transformation laterally strengthens steel framework body construction technique, it is characterized in that: described vertical connector is screw rod, and two end band screws of screw rod are also connected with nut; The old bridge hinge seam shearing that the specification of the vertical screw rod connected of hinge seam and quantity are connected by lateral connection component and the new bridge maximum value of cutting with scissors in seam shearing calculate according to " Code for design of steel structures " to be determined.
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| CN103866689B (en) * | 2014-03-30 | 2015-12-30 | 长安大学 | The new and old bridging of a kind of bridge widening connects reinforcing construction |
| 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 |
| CN103898841B (en) * | 2014-04-23 | 2015-08-19 | 魏志新 | A kind of blank board bridge reinforcement means |
| CN105220622A (en) * | 2015-08-25 | 2016-01-06 | 张江涛 | T beam widens reinforcing construction 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 |
| 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 |
| CN112281663B (en) * | 2020-10-21 | 2021-08-13 | 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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