CN103114521A - Structure and construction method of junction position of bridge abutment and roadbed - Google Patents
Structure and construction method of junction position of bridge abutment and roadbed Download PDFInfo
- Publication number
- CN103114521A CN103114521A CN2013100204837A CN201310020483A CN103114521A CN 103114521 A CN103114521 A CN 103114521A CN 2013100204837 A CN2013100204837 A CN 2013100204837A CN 201310020483 A CN201310020483 A CN 201310020483A CN 103114521 A CN103114521 A CN 103114521A
- Authority
- CN
- China
- Prior art keywords
- abutment
- soil
- roadbed
- horizontal steel
- ear
- Prior art date
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- 238000010276 construction Methods 0.000 title abstract description 6
- 239000002689 soil Substances 0.000 claims abstract description 136
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 98
- 239000010959 steel Substances 0.000 claims abstract description 98
- 280000312338 Pavement companies 0.000 claims abstract description 33
- 230000002787 reinforcement Effects 0.000 claims description 42
- 239000010410 layers Substances 0.000 claims description 24
- 230000003247 decreasing Effects 0.000 claims description 9
- 230000003014 reinforcing Effects 0.000 claims description 9
- 238000000034 methods Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005755 formation reactions Methods 0.000 claims description 2
- 210000000282 Nails Anatomy 0.000 abstract 2
- 238000004062 sedimentation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 210000003205 Muscles Anatomy 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagrams Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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- 238000005516 engineering processes Methods 0.000 description 1
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- 239000007787 solids Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound 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[O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
Abstract
Description
Technical field
The present invention relates to technical field of bridge engineering, is specifically a kind of abutment of bridge and structure and the job practices of roadbed junction.
Background technology
The abutment of bridge refers to be positioned at the bridge two ends and the supporting superstructure that is connected with roadbed and bear the structure of the pressure that bankets at the abutment back side one side of river course (namely away from).Its function, also has the pressure that bankets of keeping out the abutment back side, stablize Bridgehead by Blastig, bridge floor is connected with the road surface and the effect of connection reposefully to the basis except the load that transmits bridge superstructure.
The structure of the abutment of the bridge of prior art and roadbed junction is as follows: abutment comprises that platform cap, abutment body and concrete foundation are cushion cap, abutment body is cast on cushion cap, the platform cap is cast in the end face of abutment body, bridge plate is shelved on the abutment body end face of abutment, the back side of abutment body namely is cast with the parallel ear wall of twice away from the one side in river course along the length direction on road surface, the back side of abutment body namely abutment body is connected with subgrade soil away from the one side in river course, the subgrade soil upper has the rigid pavement, and the end face of the platform cap of the end face on road surface, abutment is substantially concordant with the bridge floor three.
The job practices of the structure of the abutment of the bridge of prior art and roadbed junction is as follows: first digging out the heatable adobe sleeping platform of accommodating abutment by the position in river course, then pour into a mould successively cushion cap, abutment body, platform cap and the ear wall of abutment, and the end of bridge plate is shelved on the abutment body end face of abutment, again with the heatable adobe sleeping platform between abutment and soil body roadbed with earthen backfill and compacting, make soil body roadbed and the abutment back side draw close namely to make soil body roadbed to be connected with the abutment back side, at last in soil body roadbed upper rigid pavement.
there is following defective in the structure of the abutment of the bridge that the prior art job practices is constructed out and roadbed junction: because abutment is the rigidity abutment, rigidity is large, and roadbed especially the subgrade stiffness in weak soil ground is little, like this, there is the sudden change of a rigidity between rigidity abutment and roadbed, bridge floor and road surface all can produce certain sedimentation and deformation under the active force of vehicle, and the sudden change of rigidity can make the sedimentation and deformation amplitude difference on bridge floor and road surface larger, cause producing very large difference in height between the two, generally, be exactly that the few roadbed subsidence of bridge floor sedimentation is many, difference in height makes and forms step between the two, cause vehicle through this position, bumping at bridge-head to occur, directly the impact driving is comfortable and safe.
Summary of the invention
The technical problem that the present invention will solve is, a kind of abutment of the bridge that the bumping at bridge-head situation occurs of avoiding driving a vehicle and the structure of roadbed junction are provided.
a technical solution of the present invention is, a kind of abutment of bridge and the structure of roadbed junction are provided, it comprises soil body roadbed, rigid pavement and by cushion cap, the abutment that abutment body and platform cap consist of, abutment body is cast on cushion cap, the platform cap is cast in the end face of abutment body, the bridge plate of bridge is shelved on the end face of abutment body, soil body roadbed is connected with the back side of abutment, the rigid pavement is cast on soil body roadbed, the parallel ear wall of twice is built along the length direction of rigid pavement in the back side of abutment body, abutment body is embedded with the many horizontal steel bars that protrude the back side of abutment body and stretch into soil body roadbed, per pass ear wall also is embedded with the many horizontal steel bars that protrude the medial surface of ear wall and stretch into soil body roadbed, every horizontal steel bar is wrapped with concrete, soil body roadbed between twice ear wall, all the horizontal steel bar concrete outer with being wrapped in horizontal steel bar consists of the platform back of the body, be provided with the thin-wall pipe pile that many row's length are successively decreased in the soil body roadbed that extends from the platform back of the body along the rigid pavement length direction, be provided with the soil nailing that many length and density are all successively decreased in the soil body roadbed that extends from the platform back of the body along the rigid pavement length direction.
Another technical problem that the present invention will solve is, the job practices of the structure of a kind of abutment of the bridge that the bumping at bridge-head situation occurs of avoiding driving a vehicle and roadbed junction is provided.
Another technical solution of the present invention is, the job practices of the structure of a kind of abutment of bridge and roadbed junction is provided, and its step comprises:
A, digging out the heatable adobe sleeping platform of accommodating abutment by the position in river course;
B, bottom pour mold is annotated cushion cap in the hole;
C, place the cage of reinforcement of the good abutment body of colligation on cushion cap, and fix many horizontal steel bars on cage of reinforcement, fix again the template of abutment body, the template at the abutment body back side is provided with and every horizontal steel bar through hole one to one, every horizontal steel bar stretches out the template at the abutment body back side from through hole, fluid concrete, many horizontal steel bars are protruded at the back side that makes it to form abutment body and abutment body, then the template of the abutment body of dismantling;
D, at the end face pouring platform cap of abutment body;
E, the end of bridge plate is shelved on the end face of abutment body;
The reinforcing cage of f, colligation two ear walls, and on ear wall reinforcing cage fixed level to reinforcing bar, the fixing template of ear wall, the template of the inboard of ear wall is provided with and every horizontal steel bar through hole one to one, every horizontal steel bar protrudes the ear template of side within the walls from through hole, cast ear wall concrete, then the ear wall form of dismantling;
Heatable adobe sleeping platform between g, use soil body backfill abutment and soil body roadbed, finally make the back side of the abutment body of soil body roadbed and abutment close up, in the process of banketing, fluid concrete wraps up every horizontal steel bar, and with the soil body, each horizontal steel bar and concrete are buried, the soil body roadbed between twice ear wall, whole horizontal steel bar and the concrete that is wrapped in outside horizontal steel bar consist of the platform back of the body;
H, squeeze into many row's thin-wall pipe piles in the soil body roadbed again, same row's many thin-wall pipe piles distances equate, arrange the light-wall pipe pile length more and successively decrease along the rigid pavement length direction from the platform back of the body;
I, squeeze into many soil nailings in soil body roadbed, the length of soil nailing and density are successively decreased along the rigid pavement length direction successively from the platform back of the body;
J, shelve one deck steel mesh reinforcement, and top and the steel mesh reinforcement of every soil nailing are fixed, and every thin-wall pipe pile is fixed through connecting reinforcement and steel mesh reinforcement, then fluid concrete, the soil nailing panel layer formed;
K, lay the bed course levelling on the soil nailing panel layer, then in bed course upper rigid pavement.
The structure of the abutment of bridge of the present invention and roadbed junction and job practices compared with prior art have following remarkable advantage and beneficial effect:
owing to being the platform back of the body of the globality that jointly consists of of concrete and soil body roadbed by horizontal steel bar, horizontal steel bar outer wrapping near the platform back of the body of abutment, its rigidity increases, and namely a rigidity specific rigidity bridge floor rigidity of the platform back of the body is smaller, and the soil body roadbed that the length direction from the platform back of the body along the road surface extends is provided with the thin-wall pipe pile that successively decreases highly successively, and the thin-wall pipe pile that highly successively decreases has played the effect of supporting the elastic support of upper pressure, and its rigidity is also to carry on the back the road surface from platform to successively decrease gently successively, moreover be provided with successively many soil nailings in the soil body roadbed that the length direction from the platform back of the body along the road surface extends, the density of soil nailing and highly also successively decreasing gently successively on the road surface dorsad from platform, the frictional force of soil nailing and the soil body can strengthen the rigidity of soil body roadbed, be that the existence of soil nailing also makes the rigidity of carrying on the back the road surface from platform successively decrease successively, therefore the platform back of the body in globality, under the acting in conjunction of thin-wall pipe pile and soil nailing, the junction that the rigidity of one is successively decreased gently appears between rigidity bridge floor and prevailing roadway, make the rigidity bridge floor, the joint portion, rigidity between the prevailing roadway three is successively decreased gently, thereby cause bridge floor, the joint portion, the mild increase of road surface three's sedimentation and deformation amplitude is bridge floor, the joint portion, the road surface three seamlessly transit, and can not produce step due to the drastic change of sedimentation and deformation amplitude, this has just effectively been avoided occurring in the driving process situation of bumping at bridge-head, ensured the comfortable and safe of driving.
As improvement, also be cast with one deck soil nailing panel layer between soil body roadbed and rigid pavement, also be provided with one deck steel mesh reinforcement in the soil nailing panel layer, top and the steel mesh reinforcement of every soil nailing are fixed, and every thin-wall pipe pile is fixed through connecting reinforcement and steel mesh reinforcement, like this, steel mesh reinforcement can be so that all soil nailing and all integral body of thin-wall pipe pile formation, finally strengthen the rigidity of soil body roadbed, further reduce the poor rigidity of soil body roadbed and rigidity bridge floor, make from the bridge floor to the road surface more smooth-going.
As improving again, the array pitch of many row's thin-wall pipe piles equates, the spacing of same row's thin-wall pipe pile also equates, can make like this stressed evenly reasonable of soil body roadbed, the final rigidity that strengthens soil body roadbed, further reduce the poor rigidity of soil body roadbed and rigidity bridge floor, make from the bridge floor to the road surface more smooth-going.
As also improving, many horizontal steel bars that are embedded in abutment body are distributed in the multilayer of differing heights, and the many horizontal steel bars of every layer equidistantly distribute; Be embedded in the multilayer that ear many horizontal steel bars within the walls also are distributed in differing heights, also equidistantly distribute with much higher horizontal steel bar of layer, like this, many horizontal steel bars of different layers have formed stereoeffect, stressed more reasonable, can effectively strengthen platform back of the body rigidity, reduce the poor rigidity of the platform back of the body and rigidity bridge floor, make bridge floor more smooth-going to the platform back of the body.
As further improvement, being wrapped in the outer concrete of horizontal steel bar is fast rigid concrete, like this can the reduction of erection time.
Description of drawings
Fig. 1 is the sectional structure schematic diagram (for making Fig. 1 clear, saving the ear wall in Fig. 1) of the structure of the abutment of bridge of the present invention and roadbed junction.
Fig. 2 is the plan structure schematic diagram of the structure of the abutment of bridge of the present invention and roadbed junction.
Shown in figure 1, cushion cap, 2, abutment body, 3, the platform cap, 4, abutment, 5, soil body roadbed, 6, rigid pavement, 7, bridge plate, 8, the ear wall, 9, horizontal steel bar, 10, the platform back of the body, 11, thin-wall pipe pile, 12, soil nailing, 13, steel mesh reinforcement, 14, the soil nailing panel layer, 15, connecting reinforcement.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1 and Figure 2, the structure of the abutment of bridge of the present invention and roadbed junction, it comprises soil body roadbed 5, rigid pavement 6 and the abutment 4 that is made of cushion cap 1, abutment body 2 and platform cap 3.Abutment body 2 is cast on cushion cap 1, and platform cap 3 is cast in the end face of abutment body 2, and the end of the bridge plate 7 of bridge is shelved on the end face of abutment body 2.Soil body roadbed 5 is connected with the back side of abutment 4, and in particular, soil body roadbed 5 is drawn close at the back side of abutment 4, and the soil pressure of soil body roadbed 5 is born at the back side of abutment 4.Rigid pavement 6 is cast on soil body roadbed 5.The back side of abutment body 2 along the rigid pavement 6 length direction build the parallel ear wall 8 of twice, ear wall 8 is together with abutment body 2 is cast in.The end face of rigid pavement 6, platform cap 3 and bridge floor three's junction is roughly concordant, seamlessly transits.Abutment body 2 is embedded with the many horizontal steel bars 9 that protrude the back side of abutment body 2 and stretch into soil body roadbed 5, and the many horizontal steel bars 9 that namely are embedded in abutment body 2 are distributed in the multilayer of differing heights, and the many horizontal steel bars 9 of every layer equidistantly distribute; Be embedded with the horizontal steel bar 9 of 4 layers as abutment body 2, every layer is 9 equally spaced horizontal steel bars 9.Described horizontal steel bar 9 refers to approximate horizontal, but in practice of construction, certain inclination rather than complete absolute level may be arranged.Per pass ear wall 8 also is embedded with the many horizontal steel bars 9 that protrude the medial surface of ear wall 8 and stretch into soil body roadbed 5, namely be embedded in the multilayer that ear wall 8 interior many horizontal steel bars 9 also are distributed in differing heights, also equidistantly distribute with much higher horizontal steel bar 9 of layer, as being embedded with the horizontal steel bar 9 of 4 layers in ear wall 9, every layer is 4 equally spaced horizontal steel bars.Every horizontal steel bar 9 is wrapped with fast rigid concrete, as the concrete of sulphate aluminium cement.The soil body roadbed 5 that twice ear wall is 8, whole horizontal steel bars 9 and be wrapped in the platform back of the body 10 of the globality of the outer fast rigid concrete Special composition solid of horizontal steel bar 9.The roughly vertical thin-wall pipe pile 11 that is provided with in the soil body roadbed 5 that 6 length directions extend from the platform back of the body 10 along the rigid pavement that many row's length successively decrease; Described roughly vertically referring in practice of construction, may have certain inclination rather than fully absolute vertically.the array pitch of many row's thin-wall pipe piles 11 equates, the spacing of same row's thin-wall pipe pile 11 also equates, array pitch as many rows thin-wall pipe pile 11 is 5m, and the spacing of every row's thin-wall pipe pile 11 is also 5m, in other words, distance between adjacent two row's thin-wall pipe piles 11 is 5m, and the distance of the every two adjacent thin-wall pipe piles 11 of every row is also 5m, same row's thin-wall pipe pile 11 equal in length, the length of different rows' thin-wall pipe pile 11 shortens gradually, a length of arranging thin-wall pipe pile 11 as the most close platform back of the body 10 is 12m, second row length is 6m, the 3rd row's length is 3m, the 4th arranges namely, and the destage back of the body 10 length farthest is 2m.The roughly vertical soil nailing 12 that is provided with in the soil body roadbed 5 that 6 length directions extend from the platform back of the body 10 along the rigid pavement that many length and density all successively decreases, it is that the length of soil nailing 12 is along with the distance away from the platform back of the body 10 increases and constantly successively decreases that length is successively decreased, soil nailing 12 length as the access platform back of the body 10 are 5m, soil nailing 12 is along with the distance with the platform back of the body 10 increases and shortens gradually, and the length of the destage back of the body 10 soil nailing 12 farthest is 2m.The radical of soil nailing in the density of soil nailing 12 refers to every square metre, in the regional soil body roadbed 5 that the destage back of the body 10 approaches, soil nailing 12 radicals of every square metre are many, soil nailing 12 is intensive, then distance increase soil nailing 12 density along with the destage back of the body 10 reduce, soil nailing 12 distributes thinning thin, and in the soil body roadbed 5 in the zone that the distance of the destage back of the body 10 is maximum, the radical of the soil nailing 12 of every square metre is minimum.Also be cast with one deck soil nailing panel layer 14 between soil body roadbed 5 and rigid pavement 6, also be provided with one deck steel mesh reinforcement 13 in soil nailing panel layer 14.The top of every soil nailing 12 and steel mesh reinforcement 13 is fixing, and specifically, soil nailing 12 comprises anchor tube, and people sink to anchor tube in soil, and then fluid concrete has just formed soil nailing 12 in the anchor tube, and weld with steel mesh reinforcement 13 on the top of the anchor tube of soil nailing 12.Every thin-wall pipe pile 11 is fixing with steel mesh reinforcement 13 through connecting reinforcement 15, specifically, connecting reinforcement 15 is L shaped, is cast with concrete in thin-wall pipe pile 11, the perpendicular muscle of L shaped connecting reinforcement 15 is anchored in the concrete of thin-wall pipe pile 11, the horizontal bar of L shaped connecting reinforcement 15 and steel mesh reinforcement 12 welding.
As shown in Figure 1 and Figure 2, the job practices of the structure of the abutment of bridge of the present invention and roadbed junction, its step comprises as follows.
A, digging out the heatable adobe sleeping platform of accommodating abutment 4 by the position in river course.
B, bottom pour mold is annotated cushion cap 1 in the hole.
C, place the cage of reinforcement of the good abutment body 2 of colligation on cushion cap 1, and fix many horizontal steel bars 9 on cage of reinforcement, fix again the template of abutment body 2, the template at the back side of abutment body 2 is provided with and every horizontal steel bar 9 through hole one to one, every horizontal steel bar 9 stretches out the template at abutment body 2 back sides from through hole, fluid concrete, make it to form many horizontal steel bars 9 of back side protrusion of abutment body 2 and abutment body 2, dismantle the again template of abutment body 2, to extract out along horizontal steel bar 9 when dismantling the template at the back side of abutment body 2, avoid bending horizontal steel bar 9 as far as possible.
D, according to prior art at the cage of reinforcement of the good platform cap 3 of end face colligation of abutment body 2, lay template and pouring platform cap 3.
E, an end of bridge plate 7 is shelved on the end face of this abutment body 2, the other end of bridge plate 7 is shelved on the end face of the abutment body 2 of another abutment 4.
The reinforcing cage of f, colligation two ear walls 8, and on ear wall 8 reinforcing cages fixed level to reinforcing bar 9, the fixing template of ear wall 8, the template of the inboard of ear wall 8 is provided with and every horizontal steel bar 9 through hole one to one, every horizontal steel bar 9 protrudes the template of ear wall 8 inboards from through hole, cast ear wall 8 concrete, then ear wall 8 templates of dismantling, to extract out along horizontal steel bar 9 when dismantling the template of medial surface of ear wall 8, avoid bending horizontal steel bar 9 as far as possible.
g, with the heatable adobe sleeping platform between soil body backfill abutment 4 and soil body roadbed 5, finally make soil body roadbed 5 and the back side of the abutment body 2 of abutment 4 and the back side of cushion cap 1 close up, in the process of banketing, pouring into a mould fast rigid concrete wraps up every horizontal steel bar 9, and with the soil body, each horizontal steel bar 9 and fast rigid concrete are buried, banket to the end face absolute altitude of soil body roadbed 5, compacted fill, the soil body roadbed 5 that twice ear wall is 8 and be imbedded in whole horizontal steel bars 9 in soil body roadbed 5 and all-in-one-piece the back of the body 10 that fast rigid concrete consists of the larger space multistory of rigidity.
H, squeezing into many row's thin-wall pipe piles 11 in soil body roadbed 5, same row's many thin-wall pipe piles 11 distances equate, the spacing of same row's thin-wall pipe pile 11 also equates, arrange the length of thin-wall pipe pile 11 6 length directions successively decrease along the rigid pavement from the platform back of the body 10 more.
I, squeeze into many soil nailings 12 in soil body roadbed 5,6 length directions successively decrease successively along the rigid pavement from the platform back of the body 10 for the length of soil nailing 12 and density; The mode of beating soil nailing 12 belongs to prior art, as the hollow anchor tube of soil nailing is squeezed in soil, then from anchor tube top fluid concrete, forms soil nailing 12.The radical of soil nailing 12 in the density of soil nailing 12 refers to every square metre.
J, shelve one deck steel mesh reinforcement 13, and top and the steel mesh reinforcement 13 of every soil nailing 12 is fixing, and every thin-wall pipe pile 11 is fixing with steel mesh reinforcement 13 through L shaped connecting reinforcement 15, the perpendicular muscle that is about to L shaped connecting reinforcement 15 is anchored in the concrete of thin-wall pipe pile 11, the horizontal bar of L shaped connecting reinforcement 15 and steel mesh reinforcement 12 welding; Fluid concrete, form soil nailing panel layer 14 again.
K, lay the bed course levelling on soil nailing panel layer 14, then in bed course upper rigid pavement 6.
Claims (6)
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| CN105113350A (en) * | 2015-08-27 | 2015-12-02 | 苏州同尚工程设计咨询有限公司 | Pier abutment roadbed structure and construction method |
| CN105887603A (en) * | 2016-05-11 | 2016-08-24 | 宁波市交通规划设计研究院有限公司 | Method for controlling differential settlement of bridgehead roadbed |
| CN105887603B (en) * | 2016-05-11 | 2018-06-19 | 宁波市交通规划设计研究院有限公司 | A kind of method for controlling Bridgehead by Blastig differential settlement |
| CN106049214B (en) * | 2016-05-31 | 2018-12-25 | 中国科学院武汉岩土力学研究所 | Cold district bridges and culverts structures changeover portion anti-freeze expansion structure |
| CN106049214A (en) * | 2016-05-31 | 2016-10-26 | 中国科学院武汉岩土力学研究所 | Bridge and culvert structure transition section anti-frost-heaving structure in cold region |
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| CN105887795A (en) * | 2016-06-07 | 2016-08-24 | 浙江大学 | Abutment back soft soil foundation gradual-change pile length counterforce loading prepressing method |
| CN106087628A (en) * | 2016-07-27 | 2016-11-09 | 浙江大学城市学院 | Without conical slope cast-in-place baffle plate foam concrete light road bank structure and construction method |
| CN106087628B (en) * | 2016-07-27 | 2018-01-09 | 浙江大学城市学院 | Without the cast-in-place baffle plate foam concrete light road bank structure of conical slope and construction method |
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