CN105507170A - Reinforced concrete slab culvert reinforcement method - Google Patents
Reinforced concrete slab culvert reinforcement method Download PDFInfo
- Publication number
- CN105507170A CN105507170A CN201510862154.6A CN201510862154A CN105507170A CN 105507170 A CN105507170 A CN 105507170A CN 201510862154 A CN201510862154 A CN 201510862154A CN 105507170 A CN105507170 A CN 105507170A
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- cover plate
- culvert
- reinforced concrete
- intensifying method
- concrete
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention discloses a reinforced concrete slab culvert reinforcement method comprising the following steps: A, removing original slab culvert side wall (1) jointing and side wall (1) surface layer loose materials, cleaning a side wall (1) surface, and scabbling a slab (2) bottom; B, paving an underlayer (6) of a bottom plate (5) of the slab culvert (5), and planting steels on the side wall (1) and slab (2); C, binding vertical wall (7) steels, erecting a template, and pouring the bottom plate (5) and vertical wall (7) concrete; D, binding top plate (8) steels, erecting a template, and pouring top plate (8) concrete; E, demoulding so as to form a novel added reinforced concrete frame structure. The reinforced concrete slab culvert reinforcement method can provide obvious slab culvert reinforcing effect, and construction cannot affect online operation.
Description
Technical field
The present invention relates to bridges and culverts field of reinforcement, particularly, relate to the intensifying method that a kind of reinforced concrete cover plate is contained.
Background technology
Railway carries heavy transport task as the main artery of national economy.Along with heavy haul railway development in recent years rapidly, the round operation that on line, train is busy creates the train response exceeding scope of design to the infrastructure under line.Rail track has a large amount of slab culvert, slab culvert is made up of reinforced concrete cover plate, building stones or concrete sidewall and basis.Most slab culvert does not possess the condition of the heavy heavy haul train of the 30t axle starting main development instantly.Often joint compartment crosses little span culvert and can produce twice tired response, this considerably increases the probability of slab culvert fatigue damage.Therefore, rail iron reinforced concrete slab culvert disease problem is serious, shows that cover plate produces longitudinal crack, abutment wall cracking external drum etc.For the slab culvert on highway alignment, owing to delivering the increase (such as, the circuit for some often have goods stock to travel) of intensity, also there is same problem.
For solving slab culvert disease problem and making it adapt to the heavy heavy haul transport of macro-axis, need the enhancements a large amount of slab culvert being taked to reinforcing or transformation.Existing enhancements has: share part distortion in cover plate bottom surface or abutment wall surface mount steel plate, suppress original structure strain cracking; Affixing carbon fabric control critical eigenvalue develops; Newly add reinforced concrete structure and increase cover plate sectional area, increase coverplate stress rigidity of section; External prestressing strengthening technology, prestress wire or the reinforcement material such as carbon fiber version or reinforcing bar initiatively apply reverse bending moment to original structure, increase original structure stress deposit.
Except external prestressing strengthening technology is active force, all the other reinforcement means are passive stressed, namely add strengthening structure afterwards and bear external loads effect to reach the object of reinforcing strengthening by original structure displacement transfer shearing force.Its shortcoming is: passive stressed reinforcement means to after add the construction technology linked between strengthening structure and former cover plate and have strict demand, construction effect is difficult to ensure; Ruggedized construction cannot be had a style of one's own, difficult and original structure collaborative work.And external prestressing strengthening technology also exists its anchorage part after reinforcing cannot check; Little span reinforced concrete cover plate is contained and is difficult to realize effective anchoring, outer Prestressing in limited space, and external prestressing strengthening technology is also in the test stage of fumbling, so do not form the reinforcement system of a set of maturation.
Summary of the invention
The object of this invention is to provide the intensifying method that a kind of reinforced concrete cover plate is contained, obvious to the consolidation effect of slab culvert, construct and effect string is not runed.
To achieve these goals, the invention provides the intensifying method that a kind of reinforced concrete cover plate is contained, it is characterized in that, comprise the following steps:
Steps A, removes abutment wall jointing and the abutment wall top layer loose material of former slab culvert, cleaning abutment wall surface; Dabbing cover plate bottom surface;
Step B, lays the base plate underlayer of slab culvert; Abutment wall bar planting, cover plate bar planting;
Step C, colligation straight wall reinforcing bar, branching standing template, builds base plate, straight wall concrete;
Step D, colligation roof steel bar, branching standing template, builds concrete roof;
Step e, form removal, is formed and newly adds steel concrete mount structure.
Preferably, in described steps A, the degree of depth that described abutment wall jointing is removed is 1 ~ 2cm.
Preferably, in described step B, the underlayer of laying is rubble or boulder concrete bed course.
Preferably, straight wall and the top board intersection of the steel concrete mount structure of formation have upper chamfering, and straight wall and base plate intersection have lower chamfering.
Preferably, described upper chamfering and top board are structure as a whole.
Preferably, in described step C, when colligation abutment wall reinforcing bar, the reinforcing bar of chamfering position in colligation simultaneously, and make the reinforcing bar of chamfering position and the bar connecting of abutment wall position.
Preferably, in described step D, top board is built by self-leveling concrete.
Preferably, in described step D, form mud jacking hole when building concrete roof at the top of described top board, in described step e, after form removal, to newly adding grouting methol between steel concrete mount structure and cover plate.
Preferably, grouting pressure during grouting methol is more than or equal to 0.9MPa, and the duration of grouting methol is more than or equal to 5 minutes.
Preferably, before laying culvert cover plate underlayer, former foundation and lower ground below cover plate is removed.
Preferably, below removal cover plate while former foundation and lower ground, remove basis, culvert access; After formation newly adds steel concrete mount structure, colligation culvert access place reinforcing bar, branching standing template, concreting.
The intensifying method that reinforced concrete cover plate provided by the invention is contained define one can be stressed alone overall structure, and linked together by bar planting at abutment wall, cover plate contact surface with former slab culvert, can be considered the sectional area increasing slab culvert, therefore, intensifying method of the present invention and original structure can well collaborative works, globality is superior, improve the problems such as top board infiltration, abutment wall external drum and concrete spalling, obvious to the consolidation effect of slab culvert, and due at culvert in-cavity construction, effect string is not runed.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for manual, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the vertical structure schematic diagram of the slab culvert after adopting intensifying method of the present invention;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the transverse sectional view of Fig. 1;
Fig. 4 is the transversary schematic diagram of the slab culvert after adopting intensifying method of the present invention, forms mud jacking hole in top board;
Fig. 5 is the vertical structure schematic diagram of the slab culvert after adopting intensifying method of the present invention, forms mud jacking hole in top board;
Description of reference numerals
1 abutment wall 2 cover plate
The 34 times grounds in basis
5 base plate 6 underlayers
7 straight wall 8 top boards
Chamfering on 9 mud jacking holes 10
11 times chamferings
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower " used typically refers to the upper and lower of slab culvert, consistent with " upper and lower " shown in accompanying drawing 3, " inside and outside " typically refers to inside and outside the profile of component involved in the present invention, " longitudinally, laterally " refers to and carries out defining with the bearing of trend of slab culvert, the span direction of slab culvert is transverse direction, as shown in Figure 3, the bearing of trend of slab culvert is longitudinally, as shown in Figure 1, wherein " longitudinal direction " and " transverse direction " is substantially vertical.Above all directions all define to understand the present invention more easily, thus do not form limiting the scope of the invention.
Suitable to Fig. 1-Fig. 5, the intensifying method that the reinforced concrete cover plate realizing above-mentioned purpose basic embodiment of the present invention is contained, can comprise the following steps:
Steps A, removes abutment wall 1 jointing and the abutment wall 1 top layer loose material of former slab culvert, cleaning abutment wall 1 surface; Dabbing cover plate 2 bottom surface;
Step B, lays the underlayer 6 of the base plate 5 of slab culvert; Abutment wall 1 bar planting, cover plate 2 bar planting;
Step C, colligation straight wall 7 reinforcing bar, branching standing template, builds base plate 5, straight wall 7 concrete;
Step D, colligation top board 8 reinforcing bar, branching standing template, builds top board 8 concrete;
Step e, form removal, is formed and newly adds steel concrete mount structure.
By the intensifying method that above-mentioned reinforced concrete cover plate is contained, make newly to add steel concrete mount structure and former slab culvert is linked together by bar planting at abutment wall, cover plate contact surface, define one can be stressed alone overall structure, the moderate finite deformation that the former slab culvert of shared produces because of strength deficiency, obvious to the consolidation effect of slab culvert, and construct and effect string is not runed.
As one preferred embodiment, the described longitudinal length newly adding steel concrete mount structure equals the longitudinal length of former slab culvert, thus improves the intensity of slab culvert on the whole.
In step, the top layer loose material of removing mainly refers to that mortar flag stone abutment wall is loose and the mortar-chalked joint that comes off, or other are attached to the loose attachment on slab culvert abutment wall 1.The mode removing these loose materials by pressure-air or manually can be cleared away or high pressure water cleaning, and preferably by high pressure water cleaning in present embodiment, elimination efficiency is high, and does not produce dust.In the present embodiment, the mode removing jointing can adopt the mode cut, and the scope cutting jointing is the part of former abutment wall and the laminating of Xin Jia frame structure.The degree of depth that preferred abutment wall jointing is removed is 1 ~ 2cm, thus the concrete of newly building can be made to fill up jointing, produces interlocking, makes newly to add steel concrete mount structure and former slab culvert is fitted more firm.
For the situation of ground weakness, in described step B, the underlayer 6 of laying is rubble or boulder concrete bed course (thickness can be about 10cm).Adopt rubble or boulder concrete bed course, the effect of diffusion-induced stress can be played, the effect of draining can be played simultaneously, and accelerate the consolidation and settlement of bottom soil layer.
In order to strengthen the rigidity of structure that reinforced concrete cover plate is contained, strengthen stress-bearing capability, preferred chamfering 10 on the straight wall 7 of the steel concrete mount structure formed has with top board 8 intersection in present embodiment, straight wall 7 and base plate 5 intersection have lower chamfering 11.By arranging upper chamfering 10 and lower chamfering 11, load is made to be passed to base plate by top board, to transmit moment of flexure.Further preferably, described upper chamfering 10 is structure as a whole with top board 8, thus is conducive to the construction of intensifying method of the present invention, and improves structural strength.
In stepb, during abutment wall bar planting, first hole on abutment wall 1; Then the landwaste powder in clean hole and ponding is removed; And anchoring bag (being preferably ZM type anchoring bag) is uprightly immersed in water, make the sealing end of anchoring bag upwards in order to exhaust, the soaked time is as the criterion with not bubbling simultaneously; Then the anchoring bag after water suction is smashed to pieces, insert about 2/3 drilling depth in holed hole; Finally anchor bar body (reinforcing bar) is squeezed in hole with hand hammer, floating aperture, complete abutment wall bar planting.
When carrying out cover plate 2 bar planting, first hole on cover plate 2; Then the landwaste powder in clean hole and ponding is removed; Again by chemically-planted steel bar glue (Anchor Agent) inject hole of holing; Finally anchor bar body (reinforcing bar) is screwed in, until at the bottom of hole, solution can not touch reinforcing bar at Anchor Agent setting up period.Its cover plate 2 and abutment wall 1 bar planting can select HRB400 reinforcing bar.
In the present embodiment, in described step C, preferably, when colligation abutment wall 1 reinforcing bar, the reinforcing bar of chamfering 10 position in colligation simultaneously, and make the reinforcing bar of chamfering 10 position and the bar connecting of abutment wall 1 position, thus strengthen the connection of top board 8 and straight wall 7.
In described step D, build top board 8 by self-leveling concrete, can self-flowing dense shaping so that construction, and can reduce and build defect.
Self gravitation due to top board 8 may make top board 8 and former cover plate see and produce gap, in the present embodiment, shown in figure 4, Fig. 5, mud jacking hole 9 is formed at the top of described top board 8 when building top board 8 concrete, in described step e, after form removal, to newly adding grouting methol between steel concrete mount structure and cover plate 2.When grouting methol, grouting pressure is preferably greater than or equal to 0.9MPa, and the duration of grouting methol is preferably greater than or equal to 5 minutes.By grouting methol, can ensure that gap is filled up, new and old structure is linked firmly.More abundant in order to make new and old structure link, be preferably along slab culvert span direction (i.e. the transverse direction of slab culvert), a mud jacking hole (mud jacking hole can be formed by pre-buried plastic pipe) is set at interval of 1m.
With reference to figure 1, in order to ensure that slab culvert culvert has enough height, before laying culvert cover plate underlayer 6, former foundation 3 and lower ground 4 below cover plate first can be removed.Below removal cover plate after former foundation 3 and lower ground 4, in order to ensure the connection that cover plate letter and culvert access are smooth-going, below removal cover plate while former foundation 3 and lower ground 4, it is basic to remove culvert access; After formation newly adds steel concrete mount structure, colligation culvert access place reinforcing bar, branching standing template, concreting.When constructing, need to tamp before containing along the slope earthwork, paving basic material, make it and the around naturally suitable slope of physical features.
Steel reinforced concrete frame structure structure that what the intensifying method that reinforced concrete cover plate of the present invention is contained was formed newly add be one can be stressed alone overall structure, and linked together by bar planting, so can be considered the sectional area increasing slab culvert at abutment wall 1, cover plate 2 contact surface with former slab culvert.What intensifying method of the present invention was formed newly add steel concrete mount structure and original structure can well collaborative works, and it is good that strengthening back shroud contains structural integrity, can improve that top board seeps water, the problem such as abutment wall external drum and concrete spalling.
Consolidation effect of the present invention obviously, operation on the not effect string of constructing, reinforce back shroud contain without the need to special maintenance, check convenient, better can ensure to contain interior people, car, cross the use of water passage space, and late maintaining is easy to maintenance.
The intensifying method that reinforced concrete cover plate of the present invention is contained can be used for railway slab culvert, also may be used for highway slab culvert.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. an intensifying method for reinforced concrete cover plate culvert, is characterized in that, comprise the following steps:
Steps A, removes abutment wall (1) jointing and abutment wall (1) the top layer loose material of former slab culvert, cleaning abutment wall (1) surface; Dabbing cover plate (2) bottom surface;
Step B, lays the underlayer (6) of the base plate (5) of slab culvert; Abutment wall (1) bar planting, cover plate (2) bar planting;
Step C, colligation straight wall (7) reinforcing bar, branching standing template, builds base plate (5), straight wall (7) concrete;
Step D, colligation top board (8) reinforcing bar, branching standing template, builds top board (8) concrete;
Step e, form removal, is formed and newly adds steel concrete mount structure.
2. the intensifying method of reinforced concrete cover plate culvert according to claim 1, is characterized in that, in described steps A, the degree of depth that described abutment wall jointing is removed is 1 ~ 2cm.
3. the intensifying method of reinforced concrete cover plate culvert according to claim 1, it is characterized in that, in described step B, the underlayer (6) of laying is rubble or boulder concrete bed course.
4. the intensifying method of reinforced concrete cover plate culvert according to claim 1, it is characterized in that, straight wall (7) and top board (8) intersection of the steel concrete mount structure formed have upper chamfering (10), and straight wall (7) and base plate (5) intersection have lower chamfering (11).
5. the intensifying method of reinforced concrete cover plate culvert according to claim 4, it is characterized in that, described upper chamfering (10) and top board (8) are structure as a whole.
6. the intensifying method of reinforced concrete cover plate culvert according to claim 5, it is characterized in that, in described step C, when colligation abutment wall (1) reinforcing bar, the reinforcing bar of chamfering (10) position in colligation simultaneously, and make the reinforcing bar of chamfering (10) position and the bar connecting of abutment wall (1) position.
7. the intensifying method of reinforced concrete cover plate culvert according to claim 1, is characterized in that, in described step D, build top board (8) by self-leveling concrete.
8. the intensifying method of reinforced concrete cover plate culvert according to claim 1, is characterized in that, in described step D, forms mud jacking hole (9) when building top board (8) concrete at the top of described top board (8);
In described step e, after form removal, to newly adding grouting methol between steel concrete mount structure and cover plate (2).
9. the intensifying method of reinforced concrete cover plate culvert according to claim 8, it is characterized in that, grouting pressure during grouting methol is more than or equal to 0.9MPa, and the duration of grouting methol is more than or equal to 5 minutes.
10. the intensifying method of reinforced concrete cover plate culvert according to claim 1, is characterized in that, before laying culvert cover plate underlayer (6), removes former foundation (3) and lower ground (4) below cover plate.
The intensifying method that 11. reinforced concrete cover plates according to claim 10 are contained, is characterized in that, below removal cover plate while former foundation (3) and lower ground (4), removes basis, culvert access;
After formation newly adds steel concrete mount structure, colligation culvert access place reinforcing bar, branching standing template, concreting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510862154.6A CN105507170A (en) | 2015-11-30 | 2015-11-30 | Reinforced concrete slab culvert reinforcement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510862154.6A CN105507170A (en) | 2015-11-30 | 2015-11-30 | Reinforced concrete slab culvert reinforcement method |
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| CN105507170A true CN105507170A (en) | 2016-04-20 |
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| CN201510862154.6A Pending CN105507170A (en) | 2015-11-30 | 2015-11-30 | Reinforced concrete slab culvert reinforcement method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836034A (en) * | 2017-03-09 | 2017-06-13 | 山西省交通科学研究院 | A kind of high roadbed slab culvert flexibility off-load system and construction method |
| CN107326791A (en) * | 2016-04-29 | 2017-11-07 | 中国电建集团贵阳勘测设计研究院有限公司 | Improvement method and structure of flooding bridge |
| CN107905547A (en) * | 2017-10-16 | 2018-04-13 | 广州地铁设计研究院有限公司 | It is a kind of to existing building joint reinforcement structure and construction method |
| CN108060797A (en) * | 2017-10-16 | 2018-05-22 | 广州地铁设计研究院有限公司 | It is a kind of to existing building joint reinforcement structure |
| CN108468281A (en) * | 2018-04-12 | 2018-08-31 | 广东高恩高速公路有限公司 | Composite cover-plate culvert, modular bridge structure and its construction method |
| CN110172930A (en) * | 2019-05-29 | 2019-08-27 | 中信国安建工集团有限公司 | A kind of prefabricated assembling type reinforced concrete culvert cover board and its production, assembly method |
| CN110616659A (en) * | 2019-08-08 | 2019-12-27 | 广州市泰宇科技发展有限公司 | Method for maintaining and reinforcing anti-collision wall of highway |
| CN114032799A (en) * | 2021-11-15 | 2022-02-11 | 张家口路桥建设集团有限公司 | Jacking device and method for reinforcing slab culvert by adopting same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326791A (en) * | 2016-04-29 | 2017-11-07 | 中国电建集团贵阳勘测设计研究院有限公司 | Improvement method and structure of flooding bridge |
| CN106836034A (en) * | 2017-03-09 | 2017-06-13 | 山西省交通科学研究院 | A kind of high roadbed slab culvert flexibility off-load system and construction method |
| CN106836034B (en) * | 2017-03-09 | 2023-04-28 | 山西省交通科学研究院 | High-fill cover plate culvert flexible load shedding system and construction method |
| CN107905547A (en) * | 2017-10-16 | 2018-04-13 | 广州地铁设计研究院有限公司 | It is a kind of to existing building joint reinforcement structure and construction method |
| CN108060797A (en) * | 2017-10-16 | 2018-05-22 | 广州地铁设计研究院有限公司 | It is a kind of to existing building joint reinforcement structure |
| CN108468281A (en) * | 2018-04-12 | 2018-08-31 | 广东高恩高速公路有限公司 | Composite cover-plate culvert, modular bridge structure and its construction method |
| CN110172930A (en) * | 2019-05-29 | 2019-08-27 | 中信国安建工集团有限公司 | A kind of prefabricated assembling type reinforced concrete culvert cover board and its production, assembly method |
| CN110616659A (en) * | 2019-08-08 | 2019-12-27 | 广州市泰宇科技发展有限公司 | Method for maintaining and reinforcing anti-collision wall of highway |
| CN114032799A (en) * | 2021-11-15 | 2022-02-11 | 张家口路桥建设集团有限公司 | Jacking device and method for reinforcing slab culvert by adopting same |
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