CN112921791A - Light abutment and construction method thereof - Google Patents
Light abutment and construction method thereof Download PDFInfo
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- CN112921791A CN112921791A CN202110093151.6A CN202110093151A CN112921791A CN 112921791 A CN112921791 A CN 112921791A CN 202110093151 A CN202110093151 A CN 202110093151A CN 112921791 A CN112921791 A CN 112921791A
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- platform
- abutment
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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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Abstract
The invention discloses a light abutment and a construction method thereof, and relates to the technical field of abutments, which comprises an abutment body, a foundation, a soil retaining plate, an abutment back, a plurality of anchor plates and a plurality of pull rods, wherein the foundation is fixed underground, the abutment body and the soil retaining plate are both fixed on the foundation, the first side of the soil retaining plate abuts against the abutment body, the second side of the soil retaining plate is fixed with a embankment, the abutment back is fixed at the upper end of the abutment body and is used for supporting a main beam, one side of the abutment back abuts against the first side of the soil retaining plate, the plurality of anchor plates are fixed inside the embankment, the first ends of the pull rods are fixed on the abutment body, the abutment back and the soil retaining plate, and the second end of one pull rod is fixed on one anchor plate. The invention has good integral stability, can effectively support the main beam and prevent the embankment from landslide.
Description
Technical Field
The invention relates to the technical field of abutment, in particular to a light abutment and a construction method thereof.
Background
The bridge abutment is located at two ends of the bridge and is a structure for supporting the upper structure of the bridge and connecting with the embankment. The function of the device is to transmit the load of the upper structure of the bridge to the foundation, and also has the functions of resisting the filling pressure behind the abutment, stabilizing the bridge head roadbed and connecting the bridge head circuit and the bridge upper circuit reliably and stably. The abutment is generally of a stone or plain concrete structure, while the light abutment is of a reinforced concrete structure. The abutment is a supporting structure arranged at the connection part of the bridge and the embankment at the shore or the extreme end of the bridge opening. It serves to support the superstructure and to connect two-shore roads while also retaining the filling behind the abutment. The abutment is mainly divided into a gravity abutment and a light abutment.
As shown in fig. 1, since the earth pressure behind the gravity abutment is mainly balanced by the dead weight, the abutment body is thick and can be constructed by using masonry materials such as natural stone, masonry concrete, and the like, without using reinforcing steel bars, and by using a cast-in-place method. It is suitable for the areas with good foundation and convenient sand and stone materials. The main disadvantages are the large volume of the masonry, the heavy weight and the large water-blocking area.
The light abutment has light volume and small self weight, is generally constructed by reinforced concrete materials, bears external force by means of the integral rigidity and the material strength of a structure, thereby saving materials, reducing the requirement on the strength of a foundation and expanding the application range, opening up an economical and feasible way for constructing the abutment on a soft foundation, and needing no bridge head butt strap.
Fig. 2 shows a first common light abutment, which needs temporary support during construction to ensure the stability of an embankment side slope, and after a bridge is built and operated, the stability of the embankment side slope behind the abutment can be ensured under the action of long-time automobile load, so that a vehicle does not jump at the position. However, the abutment body is independent, and once a large horizontal braking force occurs, the abutment body is easy to topple over, the stability problem occurs, and the safety of the bridge is endangered, so that the abutment body is only suitable for small bridges and short abutments.
Fig. 3 shows a second common light bridge abutment, wherein the abutment body and the retaining plate are integrated with the soil behind the bridge abutment through a pull rod. During construction, temporary support is needed to ensure the stability of the embankment slope. The temporary support of the retaining plate needs to be removed after the bridge is built. However, if the slope of the embankment is loose, the embankment behind the upper platform of the retaining plate is disturbed by construction, so that landslide can occur.
Therefore, there is a high necessity in the field of bridge construction for a novel lightweight abutment for solving the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a light abutment and a construction method thereof, which are used for solving the technical problems in the prior art, greatly improving the stability of the abutment and avoiding landslide of an embankment.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a light bridge abutment which comprises a platform body, a foundation, a soil retaining plate, a platform back, a plurality of anchor plates and a plurality of pull rods, wherein the foundation is fixed underground, the platform body and the soil retaining plate are fixed on the foundation, the first side of the soil retaining plate abuts against the platform body, the second side of the soil retaining plate is fixed with a embankment, the platform back is fixed at the upper end of the platform body and used for supporting a main beam, one side of the platform back abuts against the first side of the soil retaining plate, the plurality of anchor plates are fixed inside the embankment, the first ends of the pull rods are fixed on the platform body, the platform back and the soil retaining plate, and the second end of one pull rod is fixed on one anchor plate.
Preferably, the bench back is L type structure, the ladder face has on the bench back, the ladder face is used for supporting the girder.
Preferably, the stepped surface is provided with a support, and the support is used for supporting the main beam.
Preferably, the lower end of the platform body is flush with the lower end of the soil retaining plate, and the upper end of the platform back is flush with the upper end of the soil retaining plate.
Preferably, the first end of the pull rod is fixed on the platform body, the platform back and the soil retaining plate respectively through anchor bolts.
The invention also discloses a construction method of the light abutment, which comprises the following steps:
s1: excavating the embankment and constructing a supporting structure at the same time, so as to ensure the stability of the side slope of the embankment until the embankment is excavated to the designed depth;
s2: manufacturing a reinforcing mesh of the foundation, the platform body and the platform back, supporting a template, and vibrating and pouring concrete;
s3: when the concrete meets the strength requirement, the template is dismantled;
s4: and arranging a support on the table back, and erecting a main beam in place.
Preferably, the supporting means includes a soil guard plate, a tie rod, an anchor plate and an anchor bolt.
Preferably, in S2, holes are reserved in the foundation, the platform body, and the platform back by using steel sleeves when manufacturing the reinforcing mesh of the foundation, the platform body, and the platform back.
Compared with the prior art, the invention has the following technical effects:
the retaining plate and the anchor plate are fastened together through the pull rod, active soil pressure of filler behind the retaining plate is applied to the retaining plate, the force is transmitted to the anchor plate through the pull rod, and the anchor plate balances pull force of the pull rod by means of pull force generated by a soil body which is located in front of the plate and has certain shearing resistance, so that the whole structure is in a stable state.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a prior art gravity abutment;
FIG. 2 is a schematic view of a first conventional lightweight abutment of the prior art;
FIG. 3 is a schematic diagram of a second conventional lightweight abutment of the prior art;
FIG. 4 is a schematic structural view of a lightweight abutment according to the present embodiment;
in the figure: 1-a table body; 2-a base; 3-a soil retaining plate; 4-embankment; 5-table back; 6-support; 7-an anchor plate; 8-a pull rod; 9-main beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a light abutment and a construction method thereof, which are used for solving the technical problems in the prior art, greatly improving the stability of the abutment and avoiding landslide of an embankment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 4, the present embodiment provides a lightweight abutment comprising a body 1, a foundation 2, a soil guard plate 3, a back 5, a plurality of anchor plates 7, and a plurality of tie rods 8. The foundation 2 is fixed under the earth's surface near the lower end of the embankment 4, and the platform body 1 and the retaining plate 3 are both fixed on the foundation 2. The first side of retaining plate 3 offsets with platform body 1, and the second side of retaining plate 3 is fixed with embankment 4, and retaining plate 3 reserves the through-hole, lets pull rod 8 pass. The bench back 5 is fixed in the upper end of platform body 1, and the bench back 5 is used for supporting one side girder 9, and one side of bench back 5 offsets with the first side that keeps off native board 3, and the inside of embankment 4 is fixed with a plurality of anchor slabs 7, all is fixed with the first end of a plurality of pull rods 8 on platform body 1, bench back 5 and the native board 3 that keeps off, and the second end of a pull rod 8 is fixed in on an anchor slab 7.
The retaining plate 3 and the anchor plate 7 are fastened together through the pull rod 8, active soil pressure of filler behind the retaining plate 3 acts on the retaining plate 3, the force is transmitted to the anchor plate 7 through the pull rod 8, and the anchor plate 7 balances the pull force of the pull rod 8 by means of the pulling force generated by the soil body which is located in front of the plate and has certain shearing resistance, so that the whole structure is in a stable state.
To the concrete structure of the table back 5, in this embodiment, the table back 5 is an L-shaped structure, and an L-shaped plate can be used, the turning part on the table back 5 has a step surface, the step surface faces back to the soil retaining plate 3, and the step surface is used for supporting the main beam 9, and to the size of the table back 5, the technical personnel in the field can adjust according to actual needs.
Further, be equipped with support 6 on the ladder face, support 6 is used for supporting girder 9. The support 6 structure can use the support 6 that supports the girder 9 among the prior art, and support 6 will combine the load that the girder transmitted down, and the area size of beam-ends displacement and ladder face selects.
In this embodiment, the height sum of the platform body 1 and the platform back 5 is equal to the height of the soil retaining plate 3, that is, the lower end of the platform body 1 is flush with the lower end of the soil retaining plate 3, and the upper end of the platform back 5 is flush with the upper end of the soil retaining plate 3. Thus, when the bridge deck is transited to the embankment 4, the road surface is smooth and bumpy.
The fixing mode of the pull rod 8 can be selected according to the type of the pull rod 8 required in practice, in the embodiment, the first end of the pull rod 8 is respectively fixed on the platform body 1, the platform back 5 and the soil retaining plate 3 through anchor bolts, and the anchor bolts are respectively positioned on the left sides of the platform body 1, the platform back 5 and the soil retaining plate 3, so that the pull rod 8 is prevented from falling off from the platform body 1, the platform back 5 and the soil retaining plate 3.
The embodiment also provides a construction method of the light bridge abutment, which comprises the following steps:
s1: and (3) excavating the embankment 4 and making a supporting structure at the same time, ensuring the stability of the embankment 4 slope in the excavation process until the design depth is reached, wherein the design depth can be set according to actual requirements.
S2: and manufacturing a reinforcing mesh of the foundation 2, the platform body 1 and the platform back 5, supporting a template, and vibrating and pouring concrete to form a reinforced concrete structure.
S3: and (5) when the concrete meets the strength requirement, removing the template.
S4: a support 6 is arranged on the table back 5, and a main beam 9 is erected in place.
As for the supporting structure, in the present embodiment, the supporting device includes the soil guard plate 3, the tie rod 8, the anchor plate 7, and the anchor bolt.
In order to fix the tie bars 8, in this embodiment, in step S2, when the reinforcing mesh of the foundation 2, the platform body 1, and the platform back 5 is made, a steel casing is used to reserve a hole on the platform body 1 and the platform back 5, which corresponds to the hole on the soil guard plate 3 and the embankment 4 for the tie bar 8 to pass through later.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A lightweight abutment characterized by: including platform body, basis, fender board, platform back of the body, a plurality of anchor slabs and a plurality of pull rod, the basis is fixed in the underground, the platform body with it all is fixed in to keep off the board on the basis, the first side of fender board with the platform body offsets, the second side of fender board is fixed with the embankment, the platform back of the body is fixed in the upper end of platform body, the platform back of the body is used for supporting the girder, one side of platform back of the body with the first side of fender board offsets, and the inside of embankment is fixed with a plurality ofly the anchor slab, the platform body the platform back of the body with it all is fixed with a plurality ofly on the fender board the first end of pull rod, one the second end of pull rod is fixed in one on the anchor slab.
2. The light-duty bridge abutment of claim 1, wherein: the bench back is L type structure, the ladder face has on the bench back, the ladder face is used for supporting the girder.
3. The light-duty bridge abutment of claim 2, wherein: the ladder surface is provided with a support, and the support is used for supporting the main beam.
4. The light-duty bridge abutment of claim 1, wherein: the lower extreme of stage body with keep off native board lower extreme parallel and level, the upper end of stage back of the body with keep off native board upper end parallel and level.
5. The light-duty bridge abutment of claim 1, wherein: the first end of the pull rod is fixed on the platform body, the platform back or the soil retaining plate through anchor bolts respectively.
6. A construction method of a light abutment according to any one of claims 1 to 5, comprising the steps of:
s1: excavating the embankment and constructing a supporting structure at the same time, so as to ensure the stability of the side slope of the embankment until the embankment is excavated to the designed depth;
s2: manufacturing a reinforcing mesh of the foundation, the platform body and the platform back, supporting a template, and vibrating and pouring concrete;
s3: when the concrete meets the strength requirement, the template is dismantled;
s4: and arranging a support on the table back, and erecting a main beam in place.
7. The construction method of a light abutment according to claim 6, wherein: the supporting device comprises a soil retaining plate, a pull rod, an anchoring plate and an anchoring bolt.
8. The construction method of a light abutment according to claim 6, wherein: in S2, holes are reserved in the foundation, the platform body, and the platform back by using steel sleeves when manufacturing the reinforcing mesh of the foundation, the platform body, and the platform back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110093151.6A CN112921791A (en) | 2021-01-25 | 2021-01-25 | Light abutment and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110093151.6A CN112921791A (en) | 2021-01-25 | 2021-01-25 | Light abutment and construction method thereof |
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| CN112921791A true CN112921791A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110093151.6A Pending CN112921791A (en) | 2021-01-25 | 2021-01-25 | Light abutment and construction method thereof |
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Citations (7)
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| CN201224889Y (en) * | 2008-06-20 | 2009-04-22 | 云南省公路规划勘察设计院 | High and light type anchoring plate retaining wall in high filling branch block engineering |
| CN201850505U (en) * | 2010-11-18 | 2011-06-01 | 中交第一公路勘察设计研究院有限公司 | Rigid-flexible transition structure capable of preventing bumping at bridge-head |
| CN105401530A (en) * | 2015-12-18 | 2016-03-16 | 江苏兆通工程技术有限公司 | Structural layer of bridge abutment back and construction process thereof |
| CN105525627A (en) * | 2016-01-29 | 2016-04-27 | 中冶集团武汉勘察研究院有限公司 | Two-way anchorage plate retaining wall and construction method thereof |
| CN110042715A (en) * | 2019-04-29 | 2019-07-23 | 杭州悦为科技有限公司 | The construction method of the hard and soft combination soil stabilization system of Abutment Back |
| CN209836780U (en) * | 2019-01-31 | 2019-12-24 | 武汉金思路科技发展有限公司 | Lightweight abutment with anchor plate |
| DE102020109990A1 (en) * | 2020-04-09 | 2021-10-14 | Heitkamp Brückenbau GmbH | Bridge structure |
-
2021
- 2021-01-25 CN CN202110093151.6A patent/CN112921791A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| CN201224889Y (en) * | 2008-06-20 | 2009-04-22 | 云南省公路规划勘察设计院 | High and light type anchoring plate retaining wall in high filling branch block engineering |
| CN201850505U (en) * | 2010-11-18 | 2011-06-01 | 中交第一公路勘察设计研究院有限公司 | Rigid-flexible transition structure capable of preventing bumping at bridge-head |
| CN105401530A (en) * | 2015-12-18 | 2016-03-16 | 江苏兆通工程技术有限公司 | Structural layer of bridge abutment back and construction process thereof |
| CN105525627A (en) * | 2016-01-29 | 2016-04-27 | 中冶集团武汉勘察研究院有限公司 | Two-way anchorage plate retaining wall and construction method thereof |
| CN209836780U (en) * | 2019-01-31 | 2019-12-24 | 武汉金思路科技发展有限公司 | Lightweight abutment with anchor plate |
| CN110042715A (en) * | 2019-04-29 | 2019-07-23 | 杭州悦为科技有限公司 | The construction method of the hard and soft combination soil stabilization system of Abutment Back |
| DE102020109990A1 (en) * | 2020-04-09 | 2021-10-14 | Heitkamp Brückenbau GmbH | Bridge structure |
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