CN116254758B - Abutment structure and construction method - Google Patents
Abutment structure and construction method Download PDFInfo
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- CN116254758B CN116254758B CN202310430675.9A CN202310430675A CN116254758B CN 116254758 B CN116254758 B CN 116254758B CN 202310430675 A CN202310430675 A CN 202310430675A CN 116254758 B CN116254758 B CN 116254758B
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- 238000010276 construction Methods 0.000 title claims description 9
- 239000010410 layer Substances 0.000 claims abstract description 93
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 239000011381 foam concrete Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 2
- 239000011800 void material Substances 0.000 abstract description 3
- 238000004062 sedimentation Methods 0.000 description 12
- 239000004567 concrete Substances 0.000 description 8
- 230000009191 jumping Effects 0.000 description 8
- 229910000975 Carbon steel Inorganic materials 0.000 description 6
- 239000010962 carbon steel Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000011384 asphalt concrete Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a bridge abutment structure, comprising: a bridge abutment body; the bridge head butt strap is laid on the bridge abutment body and the roadbed, and two ends of the bridge head butt strap are respectively connected with the bridge deck and the road surface layer, wherein the roadbed mainly comprises the road surface layer, the road surface base layer and the backfill layer from top to bottom; the dispersing pieces are embedded in the backfill layer at intervals along the height direction, and the dispersing pieces comprise: a receiving portion provided in the backfill layer; the arch-shaped plates are arranged on the bearing part at intervals along the span direction of the bridge, and the arch crown of the arch-shaped plates is arranged opposite to the bearing part. According to the invention, the arch plates in the plurality of dispersing pieces arranged at intervals along the height direction gradually disperse longitudinal pressure generated by traffic load, so that the longitudinal deformation of the roadbed is reduced, and the phenomenon of roadbed void under the access plates is reduced.
Description
Technical Field
The invention relates to the technical field of bridges. More particularly, the present invention relates to an abutment structure and a construction method.
Background
The bridge abutment consists of an abutment cap, an abutment body and a foundation, is positioned at two ends of a bridge, is used for supporting a bridge upper structure and is connected with a embankment, and has the functions of resisting the filling pressure after the abutment, stabilizing the abutment subgrade and enabling an abutment line and an on-bridge line to be reliably and stably connected besides transferring the load of the bridge upper structure to the foundation.
The bridge abutment with the rigid structure and the flexible embankment are connected with each other, and the bridge abutment can generate larger sedimentation deformation under the repeated action of driving load, namely, the abutment subgrade, the road surface and the top surface of the bridge abutment connected with the bridge abutment form elevation differences after sedimentation, the deformation can lead the road surface longitudinal slope to generate steps, and the phenomenon of jumping is caused when a vehicle passes through, and is called bridge head jumping. The serious bridge head vehicle jump phenomenon not only greatly increases the uncomfortable feeling of driving, but also greatly reduces the speed of the vehicle and accelerates the damage of bridges, road surfaces and vehicles.
In the prior art, the bridge head jumping is slowed down by a relatively effective and economical method, namely, the bridge head access board is arranged to slow down the bridge head jumping caused by the settlement difference between the roadbed and the bridge head, for example, the patent with the application number of 201410028268.6 discloses a bridge head structure for controlling the bridge head jumping. However, as the roadbed subsides too much, the plate bottom is usually loosened, and the settlement difference between the roadbed side of the bridge head access plate and the bridge abutment is too large, so that serious bridge head jumping is caused, even the phenomenon that the bridge head access plate is broken and the warping plate occurs, and the travelling comfort is seriously affected. Therefore, how to design the bridge abutment structure to realize effectively dispersing the sedimentation difference between the bridge and the roadbed, reduce the occurrence of the phenomenon of roadbed void below the access board, and solve the problem of vehicle jump at the joint of the bridge abutment and the embankment is worth foreseeing.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a bridge abutment structure comprising:
a bridge abutment body;
the bridge head butt strap is laid on the bridge abutment body and the roadbed, and two ends of the bridge head butt strap are respectively connected with the bridge deck and the road surface layer, wherein the roadbed mainly comprises the road surface layer, the road surface base layer and the backfill layer from top to bottom;
the dispersing pieces are embedded in the backfill layer at intervals along the height direction, and the dispersing pieces comprise:
a receiving portion provided in the backfill layer;
the arch-shaped plates are arranged on the bearing part at intervals along the span direction of the bridge, and the arch crown of the arch-shaped plates is arranged opposite to the bearing part.
Preferably, the plurality of dispersing pieces are sequentially arranged from the top end of the abutment body to the direction of the roadbed bottom layer in a step-shaped step-by-step inclined downward manner.
Preferably, the length of the overlapping of the vertically downward projection of two adjacent dispersing elements is greater than one third of the length of the dispersing element.
Preferably, the receiving portion includes:
the bearing plate is arranged in the backfill layer;
the plurality of the bearing pipes are respectively arranged in the plurality of arch plates in a penetrating mode in a one-to-one correspondence mode, and the upper surface and the lower surface of the bearing pipes are respectively contacted with the inner side surface of the arch plate and the upper side surface of the bearing plate.
Preferably, the device further comprises a plurality of pairs of side plates, wherein the pairs of side plates are respectively arranged at two sides of the arch plates in a one-to-one correspondence manner;
the bearing plates are provided with a plurality of pairs of grooves which are respectively in one-to-one correspondence with the pairs of side plates, each pair of grooves is correspondingly arranged on two sides of each bearing pipe, and the pairs of side plates are inserted in the pairs of grooves in one-to-one correspondence.
Preferably, the side plate is made of polytetrafluoroethylene.
Preferably, further comprising a support frame comprising:
the inverted V-shaped supporting plate is arranged on the upper surface of the backfill layer;
the wave-shaped steel webs are arranged on the inverted V-shaped supporting plate at intervals along the span direction of the bridge;
the transverse supporting plate is transversely arranged at the upper end of the corrugated steel web plate;
wherein, the road surface basic unit is located on the horizontal backup pad.
Preferably, foam concrete is filled between two adjacent corrugated steel webs, the corrugated steel webs and the abutment body.
Preferably, the distance between two dispersing members adjacent to each other is 0.5 to 1.5m.
The construction method based on the abutment structure comprises the following steps:
s1, pouring and building an abutment body;
s2, paving and compacting a backfill layer along the height direction of the abutment body, and embedding a plurality of dispersing pieces in the backfill layer from bottom to top in a partition;
wherein, the construction steps of dispersion piece pre-buried in the backfill layer specifically do:
s2.1, paving a backfill layer to a certain thickness, placing the bearing plate on the surface of the backfill layer, and compacting until the upper end of the bearing plate is level with the surface of the backfill layer;
s2.2, inserting a plurality of arch plates from the side edges of the bearing plates through a plurality of pairs of grooves, and respectively penetrating the plurality of bearing pipes into the plurality of arch plates in a one-to-one correspondence manner;
s2.3, repeating the steps S2.1 and S2.2 until the thickness of the laid backfill layer reaches the required size;
s3, placing the prefabricated support frame on the surface of the backfill layer, compacting, and pouring a pavement base layer on the surface of the support frame;
s4, pouring the bridge deck plate and the bridge head butt strap on the bridge abutment body, and pouring the pavement layer at one end, far away from the bridge abutment body, of the bridge head butt strap.
The invention at least comprises the following beneficial effects:
the longitudinal pressure generated by the upper traffic load is dispersed by utilizing the arch plates in the dispersing pieces, and the longitudinal pressure is dispersed step by the plurality of dispersing pieces arranged along the height direction, so that the longitudinal settlement is reduced, and the beneficial effect of reducing the longitudinal deformation of the roadbed is realized.
According to the invention, the plurality of dispersing pieces are arranged to be stepped and gradually inclined downwards from the top end of the abutment body to the direction of the roadbed bottom layer, so that the sedimentation difference between the abutment body and the roadbed is uniformly dispersed in the roadbed with a certain length, the abrupt change of the height difference between the abutment body and the roadbed caused by the sedimentation difference is reduced, the phenomenon of jumping at the abutment head is effectively relieved, and the travelling comfort of the road is improved.
Thirdly, the invention effectively overcomes the defect of overlarge dead weight of the backfill layer in the past by the support frame consisting of the inverted V-shaped support plate, the corrugated steel web plate and the transverse support plate, thereby reducing the sedimentation of the backfill layer caused by dead weight.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a cross-sectional view of a bridge abutment structure according to one aspect of the present invention;
FIG. 2 is a side view of the dispersion member according to one aspect of the present invention;
FIG. 3 is a top view of the receptacle according to one embodiment of the present invention;
FIG. 4 is a schematic structural view of the dome plate according to one embodiment of the present invention;
fig. 5 is a side view of the support frame according to one embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, the orientation or positional relationship indicated by the terms are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
As shown in fig. 1 to 3, the present invention provides a bridge abutment structure comprising:
the bridge abutment body 1 can be a gravity type bridge abutment, a light bridge abutment or a combined bridge abutment, and optimally, the bridge abutment body 1 is a separated strip-shaped bridge abutment formed by concrete pouring;
the bridge head butt strap 3 is laid on the bridge abutment body 1 and the roadbed 4, two ends of the bridge head butt strap 3 are respectively connected with the bridge deck 2 and the roadbed 41, wherein the roadbed 4 mainly comprises the roadbed 41, a pavement base layer 42 and a backfill layer 43 from top to bottom, the bridge head butt strap 3 and the bridge deck 2 are formed by pouring cement concrete, the length of the bridge head butt strap 3 is 5-8 m, the material of the pavement layer 41 can be fine-grained asphalt concrete, the material of the pavement base layer 42 can be cement concrete, the backfill layer 43 can be formed by filling and compacting soil, the bridge head butt strap 3 is connected with the bridge deck 2 and the roadbed 4, a stable driving pavement can be provided, the impact effect of load on a bridge is reduced, and the temperature deformation of a seamless bridge can be transferred to the pavement;
the dispersing pieces 5 are embedded in the backfill layer 43 at intervals along the height direction, and the dispersing pieces 5 comprise:
a receiving portion 51 disposed in the backfill layer 43, wherein the receiving portion 51 may be a steel plate or a component composed of a steel plate, a groove 513, and a receiving pipe 512, and the length of the receiving portion 51 may be equal to or less than the length of the bridge head butt strap 3;
the arch plates 52 are arranged on the bearing part 51 at intervals along the span direction of the bridge, the arch tops of the arch plates 52 face away from the bearing part 51, the arch plates 52 can be made of stainless steel or carbon steel, the length of the arch plates 52 is designed according to the pavement and the bridge deck width, the arch plates 52 can be fixedly arranged on the bearing part 51 through welding, or the arch plates 52 and the side plates 53 are detachably arranged on the bearing part 51 through the grooves 513, the arch tops of the arch plates 52 face away from the bearing part 51, namely the arch tops of the arch plates 52 face away from the backfill layer 43, and face towards the bridge head butt strap 3, so that the longitudinal pressure generated by traffic load acting on the bridge head butt strap 3 can be dispersed to form transverse force, the longitudinal settlement generated by the traffic load can be dispersed to the transversely arranged bearing part 51, the beneficial effects of reducing longitudinal settlement of the roadbed 4 are realized, and the transverse pressure formed by dispersing the arch plates 52 is dispersed to form transverse pressure to mutually offset in the bearing part 51; through a plurality of dispersing pieces 5 spaced along the height direction, the longitudinal pressure generated by traffic load is gradually decreased, the sedimentation effect of the longitudinal pressure on the soil of the backfill layer 43 is weakened, and the beneficial effect of reducing the occurrence of the void phenomenon of the roadbed 4 below the access board can be realized.
In the above technical solution, the abutment body 1 is a split type strip abutment, the height of the abutment body 1 is 6.5m, after the abutment body 1 and the bridge deck 2 are formed by concrete pouring, soil is backfilled from bottom to top at one side of the abutment body 1 opposite to the bridge to form the backfill layer 43, and in the process of forming the backfill layer 43, a plurality of dispersing pieces 5 are pre-buried at intervals along the height direction, then a pavement base layer 42 and a pavement layer 41 are sequentially formed by pouring from bottom to top, then the bridge head strap 3 is poured and laid between the pavement layer 41 and the bridge deck 2, and the length of the bridge head strap 3 is 8m, so that the abutment structure can be formed; wherein, the plurality of arch plates 52 on the dispersing piece 5 disperse the longitudinal pressure generated by the traffic load acting on the bridge head butt strap 3 to form a transverse force, reduce the longitudinal settlement and reduce the longitudinal deformation of the roadbed 4, and the plurality of arch plates 52 disperse to form a transverse force which is mutually transmitted and counteracted in the transverse direction inside the bearing part 51; through a plurality of dispersing pieces 5 spaced along the height direction, the longitudinal pressure generated by traffic load is gradually decreased, the sedimentation effect of the longitudinal pressure on the soil of the backfill layer 43 is weakened, the phenomenon that the roadbed 4 under the access slab is empty can be reduced, and the problem of vehicle jump at the joint of the bridge abutment and the embankment is solved.
In another technical scheme, a plurality of dispersing pieces 5 are arranged downwards in a step-shaped step-by-step inclined manner sequentially from the top end of the abutment body 1 to the direction of the bottom layer of the roadbed 4, the number of the dispersing pieces 5 is larger than 2, the degree of the gradual inclined downwards inclination of the dispersing pieces 5 is designed according to the height of the abutment body 1, the inclination angle in the vertical direction can be 45-60 degrees, the gradual inclined downwards arrangement of the dispersing pieces 5 is in a step-by-step manner, the settlement difference of the abutment body 1 and the roadbed 4 is uniformly dispersed in the roadbed 4 with a certain length, the height difference mutation between the abutment body 1 and the roadbed 4 caused by the settlement difference is reduced, the bridge head jumping phenomenon is effectively relieved, and the road driving comfort is improved.
In another technical scheme, the length of the superposition of the vertically downward projection of the two dispersing pieces 5 adjacent to each other is larger than one third of the length of the dispersing pieces 5, the length of the dispersing pieces 5 can be 8m, the length of the superposition of the vertically downward projection of the two dispersing pieces 5 adjacent to each other can be 3m, the setting of the length is not only helpful for dispersing the longitudinal sedimentation formed by traffic load, but also for dispersing the sedimentation difference of the abutment body 1 and the roadbed 4 into the roadbed 4 with a certain length uniformly and transversely, the bidirectional dispersion sedimentation can be realized, the phenomenon that the roadbed 4 under the access plate is empty is reduced, and the problem of vehicle jump at the joint of the abutment and the embankment is solved.
In another aspect, the receiving portion 51 includes:
the bearing plate 511 is arranged in the backfill layer 43, the bearing plate 511 can be made of stainless steel or carbon steel, and a plurality of springs can be arranged in the bearing plate 511, so that longitudinal pressure generated by traffic load can be absorbed, and longitudinal settlement of the roadbed 4 can be reduced;
the plurality of spanners 512, a plurality of spanners 512 are respectively arranged in a plurality of arch plates 52 in a penetrating mode in a one-to-one correspondence mode, the upper surface and the lower surface of each spanners 512 are respectively contacted with the inner side surface of each arch plate 52 and the upper side surface of each spanners 511, the material of each spanners 512 can be stainless steel or carbon steel, the lower surface of each spanners 512 can be connected with each spanners 511 through welding, the upper surface of each spanners 511 can be in limiting contact with the inner side surface of each arch plate 52 through the corresponding grooves 513 and the corresponding side plates 53, and the spanners 512 are arranged to help support the corresponding arch plates 52, so that the strength of each arch plate 52 is increased, and the good effect of dispersing longitudinal pressure of each spanners is better achieved.
In the above technical scheme, when soil is backfilled to a certain height, the bearing plates 511 are arranged on the backfill layer 43 and compacted, the arch plates 52 are welded and fixed at intervals along the span direction of the bridge or are movably arranged on the bearing plates 511 at fixed points, the plurality of bearing pipes 512 are respectively arranged in the arch plates 52 in a penetrating mode in a one-to-one correspondence mode, the installation setting of the arch plates 52 and the bearing parts 51 can be completed, the bearing pipes 512 are helpful for supporting the arch plates 52, the strength of the arch plates 52 is increased to better achieve the good effect of dispersing longitudinal pressure, and the bearing plates 511 bear transverse force generated by dispersing the longitudinal pressure of the arch plates 52 and transmit and counteract in the bearing plates, so that excessive transverse pressure cannot be caused to the abutment body 1 and the roadbed 4.
In another technical scheme, the novel ceiling lamp further comprises a plurality of pairs of side plates 53, wherein the plurality of pairs of side plates 53 are respectively arranged at two sides of the plurality of arch plates 52 in a one-to-one correspondence manner;
the bearing plate 511 is provided with a plurality of pairs of grooves 513 corresponding to the pairs of side plates 53 one by one, each pair of grooves 513 is correspondingly arranged on two sides of each bearing tube 512, the pairs of side plates 53 are correspondingly inserted in the pairs of grooves 513, the side plates 53 and the arch plates 52 are integrally arranged, the grooves 513 are arranged in the bearing plate 511 and are communicated with the upper surface of the bearing plate 511, the pairs of side plates 53 are correspondingly inserted in the pairs of grooves 513, so that the plurality of arch plates 52 can be detachably arranged on the bearing plate 511, the arch plates 52 can be conveniently and rapidly installed and detached on the bearing plate 511, and a certain foundation can be provided for limiting movement of the arch plates 52 on the bearing plate 511.
In another technical scheme, the side plates 53 are made of polytetrafluoroethylene, the polytetrafluoroethylene has the advantages of small friction coefficient and the like, the bearing plates 511 are made of stainless steel or carbon steel, and the polytetrafluoroethylene side plates 53 and the steel plates can slide relatively due to the small friction coefficient, so that the arch plates 52 can slightly limit the bearing plates 511 along the span direction of the bridge, and are used for conforming to transverse deformation of the roadbed 4 under the action of traffic load.
In another embodiment, the device further comprises a supporting frame 6, which includes:
an inverted V-shaped support plate 61 disposed on the upper surface of the backfill layer 43, wherein the inverted V-shaped support plate 61 may be made of stainless steel or carbon steel, and the lower surface of the inverted V-shaped support plate 61 contacts and is compacted on the upper surface of the backfill layer 43;
the corrugated steel webs 62 are arranged on the inverted V-shaped supporting plate 61 at intervals along the span direction of the bridge, the plate surfaces of the corrugated steel webs 62 are vertically arranged, the lower ends of the corrugated steel webs 62 are fixedly arranged on the inverted V-shaped supporting plate 61 through welding, and cavities or foam concrete is filled between the corrugated steel webs 62;
the transverse supporting plates 63 are transversely arranged at the upper ends of the corrugated steel webs 62, the transverse supporting plates 63 can be made of stainless steel or carbon steel, and the transverse supporting plates 63 can be fixedly arranged at the upper ends of the corrugated steel webs 62 through welding;
the pavement base layer 42 is disposed on the lateral support plate 63, and the pavement base layer 42 is formed by casting on the lateral support plate 63.
In the above technical scheme, the support frame 6 has set gradually from bottom to top the inverted V-shaped support plate 61, a plurality of wave form steel web 62, the horizontal backup pad 63, wherein, the lower surface of inverted V-shaped support plate 61 closely compacts in the upper surface of backfill layer 43, lateral concreting forms on the horizontal backup pad 63 road surface basic unit 42, support frame 6 has replaced partial concrete or soil for support upper road surface basic unit 42, horizontal backup pad 63 with inverted V-shaped support plate 61 has formed a cavity between backfill layer 43 and road surface basic unit 42, and cavity internally mounted has the wave form steel web 62 of vertical setting, can effectively overcome the too big drawback of backfill layer 43 dead weight in the past to reduced the subsidence that backfill layer 43 itself causes because of the dead weight, but inverted V-shaped support plate 61 also can further disperse the longitudinal pressure of traffic load, further reduce the backfill layer 43 and produce the longitudinal subsidence because of the traffic load.
In another technical solution, foam concrete is filled between the two adjacent corrugated steel webs 62 and between the corrugated steel webs 62 and the abutment body 1, and the density of the foam concrete is lower than that of the conventional concrete, so that the foam concrete has the advantage of light weight, and the cavities between the two adjacent corrugated steel webs 62 and between the corrugated steel webs 62 and the abutment body 1 are filled with the foam concrete, so that the support of the pavement base layer 42 and the backfill layer 43 can be realized on the premise of not increasing the weight of the support frame 6.
In another embodiment, the distance between two adjacent dispersing members 5 is 0.5-1.5 m, the distance is set according to the thickness of the backfill layer 43, and most preferably, when the thickness of the backfill layer 43 is 4m, the distance between two adjacent dispersing members 5 is 1m, and the distance is set to facilitate the dispersion of the longitudinal sedimentation.
The construction method based on the abutment structure comprises the following steps:
s1, pouring and building an abutment body 1, and pouring concrete from bottom to top to form the abutment body 1;
s2, paving and compacting a backfill layer 43 along the height direction of the abutment body 1, pre-burying a plurality of dispersing pieces 5 in the backfill layer 43 from bottom to top, paving and compacting the backfill layer 43 in layers, and mounting the dispersing pieces 5 on the surface of each layer, wherein the compactness of the backfill layer 43 is more than 98%;
the construction steps of the dispersing member 5 pre-buried in the backfill layer 43 specifically include:
s2.1, paving a backfill layer 43 to a certain thickness, placing a bearing plate 511 on the surface of the backfill layer 43, and compacting until the upper end of the bearing plate 511 is level with the surface of the backfill layer 43; wherein, when laying to the backfill layer 43 height of 1m, the bearing plate 511 is placed on the surface of the backfill layer 43 and compacted;
s2.2, inserting a plurality of arch plates 52 from the side edges of the bearing plates 511 through a plurality of pairs of grooves 513, respectively penetrating the plurality of bearing pipes 512 into the plurality of arch plates 52 in a one-to-one correspondence manner, and installing the plurality of arch plates 52 on the bearing plates 511 from the side edges;
s2.3, repeating the steps S2.1 and S2.2 until the thickness of the laid backfill layer 43 reaches the required size, wherein the distance from the upper side of the arch point of the arch plate 52 to the adjacent bearing plate 511 is 1m, and sequentially repeating the steps S2.1 and S2.2 from bottom to top until the height of the backfill layer 43 reaches the required size;
s3, placing the prefabricated support frame 6 on the surface of the backfill layer 43, compacting, and pouring the pavement base layer 42 on the surface of the support frame 6; specifically, a plurality of corrugated steel webs 62 are welded on the inverted V-shaped support plate 61 in a prefabrication manner, the inverted V-shaped support plate 61 is in contact with the surface of the backfill layer 43 and compacted, foam concrete is filled and poured between two adjacent corrugated steel webs 62, the corrugated steel webs 62 and the abutment body 1 until the foam concrete is flush with the upper ends of the corrugated steel webs 62, then the transverse support plate 63 is placed at the upper ends of the corrugated steel webs 62, and the installation of the support frame 6 can be completed, and concrete is poured on the surface of the support frame 6 to form the pavement base layer 42;
s4, pouring the bridge deck plate 2 and the bridge head butt strap 3 on the bridge abutment body 1, pouring the pavement layer 41 at one end, far away from the bridge abutment body 1, of the bridge head butt strap 3, pouring the bridge head butt strap 3 on the surface of the pavement base layer 42, wherein one end of the bridge head butt strap 3 is connected with the bridge deck plate 2 formed by pouring, and the other end of the bridge head butt strap 3 is poured with fine-grained asphalt concrete to form the pavement layer 41.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (9)
1. Abutment structure, its characterized in that includes:
a bridge abutment body;
the bridge head butt strap is laid on the bridge abutment body and the roadbed, and two ends of the bridge head butt strap are respectively connected with the bridge deck and the road surface layer, wherein the roadbed mainly comprises the road surface layer, the road surface base layer and the backfill layer from top to bottom;
the dispersing pieces are embedded in the backfill layer at intervals along the height direction, and the dispersing pieces comprise:
a receiving portion provided in the backfill layer;
the arch-shaped plates are arranged on the bearing part at intervals along the span direction of the bridge, and the arch crown of the arch-shaped plates is arranged back to the bearing part;
a support bracket, comprising:
the inverted V-shaped supporting plate is arranged on the upper surface of the backfill layer;
the wave-shaped steel webs are arranged on the inverted V-shaped supporting plate at intervals along the span direction of the bridge;
the transverse supporting plate is transversely arranged at the upper end of the corrugated steel web plate;
wherein, the road surface basic unit is located on the horizontal backup pad.
2. The abutment structure according to claim 1, wherein the plurality of discrete members are disposed diagonally downward in a stepwise progression from the abutment body top end in sequence in a direction toward the subgrade bottom layer.
3. The abutment structure according to claim 2, wherein the projection of two discrete members adjacent one another vertically downward coincides by a length greater than one third of the length of the discrete members.
4. The abutment structure of claim 1, wherein the receptacle comprises:
the bearing plate is arranged in the backfill layer;
the plurality of the bearing pipes are respectively arranged in the plurality of arch plates in a penetrating mode in a one-to-one correspondence mode, and the upper surface and the lower surface of the bearing pipes are respectively contacted with the inner side surface of the arch plate and the upper side surface of the bearing plate.
5. The abutment structure according to claim 4, further comprising a plurality of pairs of side plates disposed on either side of the plurality of arch plates in one-to-one correspondence;
the bearing plates are provided with a plurality of pairs of grooves which are respectively in one-to-one correspondence with the pairs of side plates, each pair of grooves is correspondingly arranged on two sides of each bearing pipe, and the pairs of side plates are inserted in the pairs of grooves in one-to-one correspondence.
6. The abutment structure of claim 5, wherein the side plates are made of polytetrafluoroethylene.
7. The abutment structure according to claim 1, wherein foam concrete is filled between two adjacent corrugated steel webs, between the corrugated steel webs and the abutment body.
8. The abutment structure according to claim 1, wherein the distance between two adjacent upper and lower dispersion members is 0.5 to 1.5m.
9. The construction method based on the abutment structure according to any one of claims 1 to 8, characterized by comprising the steps of:
s1, pouring and building an abutment body;
s2, paving and compacting a backfill layer along the height direction of the abutment body, and embedding a plurality of dispersing pieces in the backfill layer from bottom to top in a partition;
wherein, the construction steps of dispersion piece pre-buried in the backfill layer specifically do:
s2.1, paving a backfill layer to a certain thickness, placing the bearing plate on the surface of the backfill layer, and compacting until the upper end of the bearing plate is level with the surface of the backfill layer;
s2.2, inserting a plurality of arch plates from the side edges of the bearing plates through a plurality of pairs of grooves, and respectively penetrating the plurality of bearing pipes into the plurality of arch plates in a one-to-one correspondence manner;
s2.3, repeating the steps S2.1 and S2.2 until the thickness of the laid backfill layer reaches the required size;
s3, placing the prefabricated support frame on the surface of the backfill layer, compacting, and pouring a pavement base layer on the surface of the support frame;
s4, pouring the bridge deck plate and the bridge head butt strap on the bridge abutment body, and pouring the pavement layer at one end, far away from the bridge abutment body, of the bridge head butt strap.
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