CN210561779U - Transformation structure of existing abutment - Google Patents
Transformation structure of existing abutment Download PDFInfo
- Publication number
- CN210561779U CN210561779U CN201920968638.2U CN201920968638U CN210561779U CN 210561779 U CN210561779 U CN 210561779U CN 201920968638 U CN201920968638 U CN 201920968638U CN 210561779 U CN210561779 U CN 210561779U
- Authority
- CN
- China
- Prior art keywords
- newly
- built
- old bridge
- pile foundation
- cushion cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 230000009466 transformation Effects 0.000 title abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 24
- 230000002787 reinforcement Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000221095 Simmondsia Species 0.000 description 1
- 235000004433 Simmondsia californica Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a transformation structure of existing abutment, including old bridge pile foundation, old bridge cushion cap, old bridge floor, newly-built pile foundation, newly-built cushion cap and newly-built bent cap, old bridge cushion cap overlap joint is on two rows of old bridge pile foundations, old bridge floor supports on old bridge cushion cap, old bridge floor one side is provided with the side slope, newly-built pile foundation relative side slope sets up in the opposite side of old bridge floor, and newly-built pile foundation is neat high with old bridge floor, newly-built cushion cap overlap joint is on old bridge floor and newly-built pile foundation, newly-built bent cap is located newly-built cushion cap. The utility model discloses make newly-built cushion cap and newly-built pile foundation and old bridge floor become a whole, reduced the follow-up construction degree of difficulty of building newly-built cushion cap on newly-built pile foundation and old bridge floor, the bench back that meets when avoiding newly-increased pile foundation or floor reinforcement on old bridge cushion cap collapses the scheduling problem, the safety guarantee nature is higher, the operation such as newly-built pile foundation is more simple and easy simultaneously, easy construction, material cost does not increase, time cost and safety protection cost are reduced.
Description
Technical Field
The utility model relates to a construction engineering technical field especially relates to a transformation structure of existing abutment.
Background
With the deepening of the urbanization process of China, the construction of highway bridges is distributed over all important joints in order to meet the ever-increasing traffic demands. With the rapid development of political economy, there are cases where traffic improvement needs to be performed in accordance with the characteristics of the region itself. In recent years, some bridges have been built in China, and due to the improvement of the requirements of passing under bridges and navigation, the requirement of bridge scale extension and other factors, the bridges need to be modified so as to achieve the purpose of adjusting the line type of the bridges.
In recent years, the number of in-situ reconstruction projects of highway bridges is large, at present, for the old bridge reconstruction scheme under the condition, demolition reconstruction or reconstruction is generally adopted, the old bridge reconstruction scheme is mainly realized by means of reinforcing pile foundations, rib plates or rib plates and the like, the construction method generally relates to deep foundation pits and high-place operation, limited space operation is realized, the risk coefficient is large, the construction period is required to be long, and the construction cost is high.
Meanwhile, no matter reconstruction or reconstruction is carried out, the platform back is required to be fully excavated, and then construction of pile foundations, bearing platforms, rib plates and the like is carried out, so that the defects of repeated construction, resource waste and environment damage exist.
Disclosure of Invention
The object of the present invention is to provide a modified structure of existing abutment for solving the above problems.
The utility model provides a transformation structure of existing abutment, including old bridge pile foundation, old bridge cushion cap and old bridge floor, still including newly-built pile foundation, newly-built cushion cap and newly-built bent cap, old bridge cushion cap overlap joint is on two rows of old bridge pile foundations, old bridge floor supports on old bridge cushion cap, old bridge floor one side is provided with the side slope, the relative side slope of newly-built pile foundation sets up in the opposite side of old bridge floor, and newly-built pile foundation is high with old bridge floor, newly-built cushion cap overlap joint is on old bridge floor and newly-built pile foundation, newly-built bent cap is located newly-built cushion cap.
The beneficial effects of the utility model reside in that:
1. the newly-built bearing platform is directly overlapped on the old bridge rib plate and the newly-built pile foundation, so that the newly-built bearing platform, the newly-built pile foundation and the old bridge rib plate are integrated, the construction difficulty of subsequently building the newly-built bearing platform on the newly-built pile foundation and the old bridge rib plate is reduced, and the safety of the integral construction is ensured;
2. the old bridge bearing platform and the old bridge rib plates are not required to be transformed in a large scale, large-scale back filling excavation is avoided, the problems that pile foundations are newly added on the old bridge bearing platform or the rib plates are collapsed when being reinforced are avoided, and the like, safety guarantee performance is higher, meanwhile, the operation of newly building the pile foundations and the like is simpler and easier, construction is easy, material cost is not increased, and time cost and safety protection cost are reduced;
3. the foundation pit is not excavated, the bridge abutment is transformed, the subgrade transition section area is a settled subgrade, and the post-construction settlement inevitably caused by the fact that the transition section is re-filled after the foundation pit is excavated is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic elevation view of an existing abutment according to the present invention before reconstruction;
fig. 2 is a schematic plan view of an existing abutment according to the present invention before reconstruction;
fig. 3 is a schematic elevation view of the new pile foundation construction of the present invention;
fig. 4 is a schematic plan view of the new platform of the present invention;
fig. 5 is a schematic elevation view of an existing abutment of the present invention after being modified.
Description of the reference numerals
1-side slope, 2-slope protection facility, 3-old bridge floor slab, 4-old bridge capping beam, 5-old bridge rib plate, 6-old bridge bearing platform, 7-old bridge pile foundation, 8-newly-built pile foundation, 9-connecting steel bar, 10-step, 11-filling, 12-newly-built bearing platform and 13-newly-built capping beam.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise specified, the terms of orientation such as "upper" and "lower" are generally defined based on the orientation or positional relationship shown in the drawings, and specifically refer to the direction of the drawing shown in fig. 1 in combination with the positional relationship of the corresponding parts in other drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
The utility model relates to an existing abutment's transformation structure, including old bridge pile foundation 7, old bridge cushion cap 6, old bridge floor 5, newly-built pile foundation 8, newly-built cushion cap 12 and newly-built bent cap 13.
Old bridge cushion cap 6 overlap joint is on two rows of old bridge pile foundations 7, and old bridge floor 5 supports on old bridge cushion cap 6, and old bridge floor 5 one side is provided with side slope 1, and the relative side slope 1 of newly-built pile foundation 8 sets up in the opposite side of old bridge floor 5, and newly-built pile foundation 8 is high with old bridge floor 5. Newly-built cushion cap 12 overlap joint on old bridge floor 5 and newly-built pile foundation 8, newly-built cushion cap 12's both sides are connected with newly-built pile foundation 8 top and the connecting reinforcement 9 on old bridge floor 5 top respectively, and old bridge floor 5 and newly-built pile foundation 8 all are located newly-built cushion cap 12's marginal position. Newly-built bent cap 13 is located newly-built cushion cap 12, and old bridge bent cap 4 normal position is on old bridge floor 5, and old bridge bent cap 4 demolishs the back, and newly-built bent cap 13 is located same vertical plane with the axis position that extends along the roof beam direction of old bridge bent cap 4.
The utility model relates to a construction process of reforming transform structure of existing abutment does:
s1: and (3) removing the beam slab of the existing abutment, the old bridge butt strap 3 and the old bridge bent cap 4, and reserving the connecting steel bars 9 of the old bridge bent cap 4 and the old bridge rib plate 5.
After the bridge slab is cut and separated, the slab is removed from the cap beam using a bridge crane or a crane. And (4) crushing the slab behind the platform by using a crushing head, and cleaning after crushing. Old bridge bent cap 4 carries out the piecemeal and demolishs, uses diamond wire rope saw to cut the bent cap piecemeal, remains the part bent cap of being connected with old bridge floor 5 top, later adopts broken head or artifical chisel to remove, remains the connecting reinforcement 9 on the old bridge floor 5. And then, the old bridge rib plate 5 is broken or lengthened according to the design elevation of the newly-built bridge abutment.
S2: and (5) carrying out slope setting and filling 11 on the side slope 1 below the bridge.
The existing slope surface protection facilities 2 are removed by adopting an excavator, manpower and the like. A plurality of steps 10 are longitudinally excavated on the side slope 1, the width and the height of each step 10 are 2m and 80cm, and the longitudinal excavation height of each step 10 is determined according to specific conditions. And then widening the side slope 1 and filling the soil 11 in layers, and carrying out slope-releasing calculation on the width of the soil 11 according to the height of the soil.
S3: and determining the position of the newly-built pile foundation 8 by measuring and setting off, and then constructing the newly-built pile foundation 8.
Burying pile foundation pile casing underground in the newly-built pile foundation 8 position of confirming, digging the drilling soon to hang and establish pile foundation steel reinforcement cage, concreting to than pile bolck design elevation higher than at least 50cm, chiseling pile bolck concrete to the design elevation, expose the connecting reinforcement 9 at newly-built pile foundation 8 tops.
S4: the position of a newly-built bearing platform 12 is determined through measurement and paying-off, construction of the newly-built bearing platform 12 is conducted, and the newly-built bearing platform 12 connects a newly-built pile foundation 8 and an old bridge rib plate 5 into an integral structure through connecting steel bars 9 at the top of the old bridge rib plate 5 and connecting steel bars 9 at the top of the newly-built pile foundation 8.
And placing reinforcing steel bars of the bearing platform according to a drawing and reinforcing, pouring concrete of the newly-built bearing platform 12 after formwork supporting and reinforcing, and connecting the newly-built pile foundation 8 and the old bridge rib plate 5 into a whole.
S5: and (5) constructing the newly-built bent cap 13, wherein the positions of the axes of the newly-built bent cap 13 and the old bridge bent cap 4 extending along the beam direction are in the same vertical plane.
Finally, the foundation earthwork is backfilled, and construction work such as a cushion, a stop block, a bridge abutment ear back wall and the like is performed on the newly-built bent cap 13. So far, the bridge abutment transformation work is completed, other bridge structures are constructed in sequence, and the follow-up work is carried out according to the general bridge construction process.
Following provide the utility model discloses stride the concrete implementation mode that No. 0 abutment of Beijing nine railway overpass reconstruction extension engineering south half is reformed transform and is under construction even in jojoba highway merchant dune to the blue examination section:
1. overview of the engineering
The angle between the south half-width No. 0 bridge abutment of the Jingjiu railway separation type overpass and the central line of the line is 67 degrees, the net width of the bridge deck is 12m, and bridge abutment reinforcement and under-bridge clearance adjustment work are required due to bridge reconstruction engineering.
2. Old bridge structure demolition
Cutting the bridge beam plate in pieces, hoisting and dismantling the bridge beam plate by using a 50t crane, and transferring the bridge beam plate to other places for storage; crushing and dismantling the slab behind the platform by using a crushing head, and transferring crushed residues out of a construction operation area; demolish old bridge bent cap piecemeal, use diamond wire rope saw with the bent cap piecemeal cutting, remain floor top bent cap, later adopt broken head or artifical chisel to remove, remain floor connecting reinforcement. When the bent cap is cut, the bent cap seam of the middle part of the two ribs is in a splayed shape, and the bent cap seam is wide at the top and narrow at the bottom, so that the bent cap seam can be conveniently lifted by a crane after cutting and cannot be clamped.
3. Under-bridge slope transformation
Removing the existing slope hexagonal blocks by adopting an excavator in a manual matching mode; excavating a slope along the direction of the existing capping beam, and excavating steps with the width of 2m and the height of 80cm in layers; widening the slope surface, filling soil layer by layer, wherein the top position of the slope is a newly-built capping beam bottom side line, and the slope of the newly-filled slope is 1: 1.5.
4. construction of pile foundation behind platform
Determining the position of a newly added pile foundation behind the platform through measurement and setting-out; embedding a pile foundation pile casing in a pile position, performing rotary drilling, hoisting a pile foundation reinforcement cage according to requirements, and pouring concrete until the height of the pile foundation pile casing is higher than the designed elevation of a pile top by at least 50 cm; and chiseling off the pile top concrete to the designed elevation to expose the pile top connecting steel bar.
5. Newly-built cushion cap roof beam
Carrying out bar planting and encryption on the existing rib plate connecting bars, and welding and lengthening, wherein the single-side welding length is more than 10d (d is the diameter of the steel bar); determining the position of the bearing platform by measuring and paying off; and placing and reinforcing the reinforcing steel bars of the bearing platform according to the drawing, and pouring the bearing platform concrete after the formwork is reinforced. The newly-built pile foundation and the ribbed slab are connected into a whole; and (4) newly building a bent cap on the bearing platform, wherein the axis of the newly-built bent cap and the axis of the bent cap of the old bridge are positioned at the same position.
6. Performing other bridge structure construction
After the bent cap construction is completed, the bridge abutment transformation work is basically completed, and other structures are carried out according to a general construction procedure sequence.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (3)
1. The utility model provides a reform transform structure of existing abutment which characterized in that: including old bridge pile foundation, old bridge cushion cap, old bridge floor, newly-built pile foundation, newly-built cushion cap and newly-built bent cap, old bridge cushion cap overlap joint is on two rows of old bridge pile foundations, old bridge floor supports on old bridge cushion cap, old bridge floor one side is provided with the side slope, newly-built pile foundation relative slope sets up in the opposite side of old bridge floor, and newly-built pile foundation is high with old bridge floor together, newly-built cushion cap overlap joint is on old bridge floor and newly-built pile foundation, newly-built bent cap is located newly-built cushion cap.
2. A retrofit structure for an existing abutment as claimed in claim 1, wherein: the two sides of the newly-built bearing platform are respectively connected with connecting steel bars of the newly-built pile foundation top and the old bridge rib plate top, and the old bridge rib plate and the newly-built pile foundation are located at the edge position of the newly-built bearing platform.
3. A retrofit structure for an existing abutment as claimed in claim 1, wherein: old bridge bent cap normal position is on old bridge floor, and old bridge bent cap demolishs the back, and the axis position that extends along the roof beam direction of newly-built bent cap and old bridge bent cap is located same vertical plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920968638.2U CN210561779U (en) | 2019-06-26 | 2019-06-26 | Transformation structure of existing abutment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920968638.2U CN210561779U (en) | 2019-06-26 | 2019-06-26 | Transformation structure of existing abutment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210561779U true CN210561779U (en) | 2020-05-19 |
Family
ID=70628482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920968638.2U Withdrawn - After Issue CN210561779U (en) | 2019-06-26 | 2019-06-26 | Transformation structure of existing abutment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210561779U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184952A (en) * | 2019-06-26 | 2019-08-30 | 中铁八局集团第二工程有限公司 | A kind of reconstruction structure and its construction method of existing abutment |
| CN111622090A (en) * | 2020-05-26 | 2020-09-04 | 中铁大桥科学研究院有限公司 | Soft foundation lower abutment reinforcing construction method |
-
2019
- 2019-06-26 CN CN201920968638.2U patent/CN210561779U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184952A (en) * | 2019-06-26 | 2019-08-30 | 中铁八局集团第二工程有限公司 | A kind of reconstruction structure and its construction method of existing abutment |
| CN110184952B (en) * | 2019-06-26 | 2024-01-16 | 中铁八局集团第二工程有限公司 | Modification structure of existing bridge abutment and construction method thereof |
| CN111622090A (en) * | 2020-05-26 | 2020-09-04 | 中铁大桥科学研究院有限公司 | Soft foundation lower abutment reinforcing construction method |
| CN111622090B (en) * | 2020-05-26 | 2021-10-26 | 中铁大桥科学研究院有限公司 | Soft foundation lower abutment reinforcing construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101761068A (en) | Box-raft pressure-bearing type foundation underpinning and construction reinforcing method for tunnel across pile foundation of bridge above river | |
| CN109914173B (en) | Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof | |
| CN110485429A (en) | A kind of prestressing force fashioned iron assembled combination inner support construction method | |
| CN105545323A (en) | Construction method for open cut tunnel lining | |
| CN104294769B (en) | A kind of piling and the construction method increasing the built bridge abutment structure of platform cap composite reinforcement | |
| CN210561779U (en) | Transformation structure of existing abutment | |
| CN105862930A (en) | Protection structure on existing tunnel below new underground engineering | |
| CN113235601A (en) | Deep foundation pit construction risk control structure and method for collapsible loess adjacent building | |
| CN112982481B (en) | Structure construction method for crossing subway intersection node on pipe gallery | |
| CN108867692A (en) | The protection of city big cross section open trench tunnel Nearby Structure and tunnel foundation pit method for digging | |
| CN111779025A (en) | In-situ protection structure crossing foundation pit municipal pipe network box culvert and construction method | |
| CN106836007B (en) | It is suitble to the overbridge design and construction method of incremental launching method | |
| CN208517810U (en) | A kind of temporary trestle bridge for deep big foundation pit excavation construction | |
| CN110184952B (en) | Modification structure of existing bridge abutment and construction method thereof | |
| CN112456353B (en) | Construction method of fixed foundation of movable arm tower crane and movable arm tower crane structure | |
| CN103352484A (en) | Construction method of shallow bridge foundation of sedan lifting type reinforced bridge pier | |
| CN110529120B (en) | Construction method for removing invasion limiting structure by chiseling VI-level surrounding rock shallow-buried underground excavation loess tunnel | |
| CN106638610A (en) | Large-difference staggered connection structure and construction method thereof | |
| CN113529830B (en) | Isolation-underpinning combined reinforcement structure of adjacent building of shallow tunnel and construction process thereof | |
| CN106337373B (en) | Construction method for obliquely penetrating existing line overhead jacking box culvert | |
| CN107653787A (en) | It is a kind of to protect the construction method across the underground high voltage cable box culvert of foundation ditch | |
| CN112982381A (en) | Construction method of slide-resistant pile | |
| CN107587528B (en) | It is a kind of to protect the design and construction method across the underground high voltage cable box culvert of foundation pit | |
| CN108708370B (en) | Pile hole construction process for bridge pile foundation in alpine region | |
| CN206581272U (en) | Discrepancy in elevation misconnection structure and building structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200519 Effective date of abandoning: 20240116 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200519 Effective date of abandoning: 20240116 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |