CN107119711A - A kind of connected structure and construction method for abutting existing transfer station on a large scale - Google Patents
A kind of connected structure and construction method for abutting existing transfer station on a large scale Download PDFInfo
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- CN107119711A CN107119711A CN201710545302.0A CN201710545302A CN107119711A CN 107119711 A CN107119711 A CN 107119711A CN 201710545302 A CN201710545302 A CN 201710545302A CN 107119711 A CN107119711 A CN 107119711A
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Abstract
The invention discloses a kind of connected structure and construction method for abutting existing transfer station on a large scale, reinforcement longeron and post are concrete cast-in-situ structure, make it be combined with existing structure by embedding re-bar technique to link together, set movement joint to complete the connection of new and old structure between reinforced structure and newly-built structure afterwards, the safety that measure ensures existing structure thing such as abolish finally by reinforced structure, segmentation static(al).By the newly-built station of a wide range of adjacent part of top-down invers method, interconnection technique is layered, lateral support is provided in time, can strictly control building up station deformation to ensure existing structure safety.Simultaneously, the present invention also substantially increases water resistance by adding infiltration path at the recessed longeron growth bottom deformation seam of bottom plate, and the deformation of control existing structure and internal force conversion are highly beneficial, and be particularly suitable for use in adjacent engineering on a large scale and the complicated engineering of surrounding enviroment.
Description
Technical field
The invention belongs to subway engineering field, and in particular to it is a kind of on a large scale abut existing transfer station connected structure and
Construction method.
Background technology
Build subway and have become and solve the problems, such as one of effective way of Modern Traffic, with metro construction scale
Constantly increase, transfer station occupies increasingly consequence in Urban Rail Transit.The transfer of the old and new's subway line
And the connection problem of subway station and existing subway station is not built in same period construction after necessarily referring to.Designer first builds subway in design
During station, transfer interface can be typically reserved, so that follow-up Station Design is constructed.
Due to Modern Urban Development excessive velocities, subway gauze is constantly in adjustment state, is not reserving transfer sometimes
Also transfer station, such as Metro Line 1 in Nanjing and No. 4 line transfer stops drum tower station occur in the case of condition.In such engineering,
If not taking the deformation of control building up station and cutting measure and the method for existing structure, it will to the safety of existing subway station
Produce totally unfavorable influence.Especially when later stage construction subway horizontal span is big, surrounding enviroment are complicated, it is impossible to utilize temporary support
The station of existing structure deformation is controlled, it is slightly unreasonable that it is connected design and construction scheme, it will causing existing structure to produce can not
Inverse destruction, causes engineering accident what is more, jeopardizes the Metro Passenger security of the lives and property.
The content of the invention
The present invention proposes to solve the problem of prior art is present, and the purpose is to provide a kind of adjacent on a large scale existing change
The connected structure and construction method of boarding station.
The technical scheme is that：A kind of connected structure for abutting existing transfer station on a large scale, including A lines were both
There are station and the newly-built station of B lines, the two joining place formation transfer station is continuously opened on the side wall of A line building up station
Hole, forms the multiple passways communicated with the newly-built station of B lines, and the passway includes the hole at existing structure, negative one layer
Back timber at hole, back timber at minus two layers of hole, pillar at negative one layer hole, pillar at minus two layers of hole, facing for axle power can be applied
When support post and full hall scaffold, newly-built structure inside back-up sand steel pipe column, steel pipe column slab column connection reinforcement ring, steel pipe
Post reinforcement welding reinforcing ring, steel pipe column baseplate reinforcing bar welding reinforcing ring, the recessed ring beam of back plate connections and plate, the temporary support
Temporary support column in column and full hall scaffold is steel pipe support, is furnished with jack in the middle of it, can when removing side wall and
When put at side wall, steel pipe column reinforcement welding reinforcing ring is the annular slab that is welded of steel plate, newly-built station structure longeron and
Crossbeam reinforcing bar is welded on reinforcing ring, it is ensured that reinforcing steel bar bear；Back plate connections in the recessed ring beam of back plate connections and plate are recessed
Ring beam is the beam that is poured under newly-built structure bottom plate, and it can be against in existing building enclosure, completes horizontal direction power transmission and can be
Water expandable waterstop is inside added, strengthens waterproof slab ability.
The top plate of the building up station, middle plate, at building up station bottom plate outside respectively with the cast-in-place reinforcement longeron of newly-built structure,
The reinforcement longeron include negative one layer reinforcement longeron and connecting plate, minus two layers of reinforcement longeron and connecting plate, bottom plate reinforcement longeron and connecting plate,
Cast-in-place negative one layer reinforcement pillar, minus two layers of reinforcement pillar, built in reverse hierarchical at movement joint, implantation reinforcing bar, the reinforcement longeron
Reinforcement pillar reinforcing bar is connected by reinforcing bar connector in journey.
The connected structure applies station according to site condition construction fender post, back-up sand steel tube column foundation, back-up sand steel pipe column
Negative one layer reinforcement longeron and connecting plate complete top plate connection, reserve negative one layer reinforcement pillar reinforcing bar interface by reinforcing bar connector, treat
Top plate is reached after design strength, backfills earthing, and successively earth excavation is made to subinverse, construct newly-built station negative one layer side wall, middle plate
And minus two layers of reinforcement longeron and connecting plate, negative one layer reinforcement pillar, minus two layers of reinforcement pillar reinforcing bar is reserved by reinforcing bar connector and connect
Mouthful；After middle plate reaches design strength, successively earth excavation is made to subinverse, construction station minus two layers of side wall, bottom plate, bottom plate is recessed
Longeron and connecting plate, minus two layers of reinforcement pillar；After bottom plate reaches design strength, set in building up station negative one layer and minus two layer frame
Temporary support column and full hall scaffold, then segmentation abolish, the side wall in tunnel opening area building up station region.
A kind of construction method of above-mentioned connected structure for abutting existing transfer station on a large scale, comprises the following steps：
（ⅰ）Site preparation, builds that station stanchion is basic and embedded back-up sand steel pipe column the construction later stage；
（ⅱ）Excavate on the soil body to newly-built structure top plate, cut building up station structural envelope main structure body structure roof part coagulation
Soil simultaneously retains its reinforcing bar, in building up station top plate implantation implantation reinforcing bar；
（ⅲ）Excavate under soil layer to newly-built structure top plate, the laying later stage builds station top plate, beam, post reinforcing bar, applies and existing knot
Negative one layer reinforcement longeron and connecting plate, negative one layer reinforcement pillar at structure connecting portion side wall position, and reserved steel bar plugs into, and sets and becomes
Shape is stitched, casting concrete, and completion is connected with building up station structure roof, is treated that concrete strength reaches design requirement, is backfilled top plate
Earthing, station top surface recovers normal；
（ⅳ）Soil layer is excavated into newly-built structure under plate, the construction later stage builds plate in station, the tick slot in existing building enclosure makes
Plate bottom portion space in being filled with slightly expanded concrete beam, builds station and building up station building enclosure, it is ensured that middle plate after connection
Locate horizontal direction power transmission；
（ⅴ）Plate above building up station structural envelope structure in newly-built station is cut, is applied and existing structure connecting portion side wall position
The reinforcing bar of the minus two layers of reinforcement longeron in the place of putting and connecting plate, negative one layer reinforcement longeron and connecting plate and reserved minus two layers of reinforcement pillar is plugged into
Device, sets movement joint, and casting concrete, completion is connected with plate in building up station agent structure；
（ⅵ）Treat step（ⅴ）Middle board concrete reach after design strength that excavate under soil layer to newly-built structure bottom plate, construction is new
Structure base slab is built, the tick slot in building up station building enclosure, the construct recessed ring beam of back plate connections and plate, embedded building up station encloses
In protection structure, it is ensured that horizontal direction power transmission at bottom plate；
（ⅶ）Cut newly-built station bottom plate above building up station building enclosure, apply with existing structure connecting portion side wall position
Bottom plate reinforcement longeron and connecting plate, minus two layers of reinforcement pillar, set movement joint, and casting concrete is completed and building up station body junction
Structure bottom plate is connected；
（ⅷ）Temporary support column and full hall scaffold are set up inside building up station；
（ⅸ）After connected structure concrete strength reaches design requirement intensity, segmentation cuts existing structure negative one layer side wall, protects
Wall and beam column position reinforcing bar at reserved reinforcement pillar are stayed, back timber at negative one layer hole is applied；
（ⅹ）After negative one layer back timber concrete reaches design requirement intensity, segmentation cuts the minus two layers of side wall of existing structure, retains
Wall and beam column position reinforcing bar at reserved reinforcement pillar, apply back timber at minus two layers of hole, treat minus two layer concretes intensity knot to setting
Meter removes temporary support column and full hall scaffold after requiring, completion is connected with existing A lines.
Beneficial effects of the present invention are as follows：
（1）Using top-down invers method, using newly-built structure lateral rigidity, strict control building up station deformation.
（2）Pass through top-down invers method layering connection existing structure so that existing structure internal force change substep is changed, and stress is more
Rationally.
（3）First apply reinforced structure and interim upright supports, the vertical deformation of strict guarantee existing structure and safety.
（4）Staged and layered abolishes existing structure, stronger to existing structure stress check calculation.
（5）Scheme is abolished using static(al), noise pollution is small.
（6）It is small on surrounding enviroment influence and traffic impact using top-down invers method.
Brief description of the drawings
Fig. 1 is the position view of newly-built structure and existing structure in the present invention；
Fig. 2 is the sectional view in O-O sections in Fig. 1；
Fig. 3 is the assembling schematic diagram of back-up sand steel pipe column in the present invention；
Fig. 4 is the structural representation of steel pipe column slab column connection reinforcement ring in the present invention；
Fig. 5 is the structural representation of steel pipe column reinforcement welding reinforcing ring in the present invention；
Fig. 6 is the structural representation of steel pipe column baseplate reinforcing bar welding reinforcing ring in the present invention；
Fig. 7 is newly-built structure longeron and crossbeam reinforcing bar and steel column welding schematic diagram in the present invention；
Fig. 8 ~ 17 are the working procedure figures of construction method in the present invention；
Wherein：
Back timber at 2 minus two layers of hole of back timber at 1 negative one layer hole
Pillar at the negative one of 3 building up station bottom plate 4 layer hole
The negative one of pillar 6 layer reinforcement longeron and connecting plate at 5 minus two layers of hole
7 minus two layers of reinforcement longeron and the bottom plate reinforcement longeron of connecting plate 8 and connecting plate
The minus two layers of reinforcement pillar of 9 negative ones layer reinforcement pillar 10
The back-up sand steel pipe column of 11 movement joint 12
The recessed ring beam of 13 back plate connections and the building up station structural envelope structure of plate 14
The steel pipe column reinforcement welding reinforcing ring of 15 steel pipe column slab column connection reinforcement ring 16
The 17 steel pipe column baseplate reinforcing bars welding implantation reinforcing bar of reinforcing ring 18
The slightly expanded concrete beam of 19 reinforcing bar connector 20
Plate in the newly-built structure of 21 newly-built structure top plate 22
23 newly-built structure bottom plates
24 temporary support columns and full hall scaffold
The back-up sand steel tube column foundation of 25 water expandable waterstop 26
0 hole.
Embodiment
Hereinafter, referring to the drawings and embodiment the present invention is described in detail：
As shown in Fig. 1 ~ 7, a kind of connected structure for abutting existing transfer station on a large scale, including the building up station of A lines and No. B
The newly-built station of line, the two joining place formation transfer station, continuously punches on the side wall of A line building up station, is formed and No. B
Multiple passways that the newly-built station of line is communicated, the passway include existing structure at hole 0, negative one layer hole at back timber 1,
Back timber 2 at minus two layers of hole, pillar 4 at negative one layer hole, pillar 5 at minus two layers of hole, the temporary support that can apply axle power are stood
Back-up sand steel pipe column 12, steel pipe column slab column connection reinforcement ring 15, steel pipe column inside at post and full hall scaffold 24, newly-built structure
Reinforcement welding reinforcing ring 16, steel pipe column baseplate reinforcing bar welding reinforcing ring 17, the recessed ring beam of back plate connections and plate 13, it is described interim
Temporary support column in support post and full hall scaffold 24 is steel pipe support, and it is middle equipped with jack, can remove side
Put in time at side wall during wall, steel pipe column reinforcement welding reinforcing ring 16 is the annular slab that steel plate is welded, newly-built station knot
Structure longeron and crossbeam reinforcing bar are welded on reinforcing ring, it is ensured that reinforcing steel bar bear；Bottom plate in the recessed ring beam of back plate connections and plate 13
The recessed ring beam in junction is the beam poured under newly-built structure bottom plate, and it can be against in existing building enclosure, completes horizontal direction
Power transmission and water expandable waterstop 25 can be added inside, strengthen waterproof slab ability.
The top plate of the building up station, middle plate, outside is vertical with the cast-in-place reinforcement of newly-built structure respectively at building up station bottom plate 3
Beam, the reinforcement longeron include negative one layer reinforcement longeron and connecting plate 6, minus two layers of reinforcement longeron and connecting plate 7, bottom plate reinforcement longeron and
Cast-in-place negative one layer reinforcement pillar 9, minus two layers of reinforcement pillar 10 at connecting plate 8, movement joint 11, implantation reinforcing bar 18, the reinforcement longeron,
Reinforcement pillar reinforcing bar is connected by reinforcing bar connector 19 during reverse hierarchical is built.
The connected structure is applied according to site condition construction fender post, back-up sand steel tube column foundation 26, back-up sand steel pipe column 12
Station negative one layer reinforcement longeron and connecting plate 6 complete top plate connection, and the reinforcing bar of negative one layer reinforcement pillar 9 is reserved by reinforcing bar connector 19
Interface, after top plate reaches design strength, backfills earthing, successively earth excavation is made to subinverse, newly-built station negative one layer side of constructing
Wall, middle plate and minus two layers of reinforcement longeron and connecting plate 7, negative one layer reinforcement pillar 9, minus two layers of reinforcement is reserved by reinforcing bar connector 19
The reinforcing bar interface of pillar 10；After middle plate reaches design strength, successively earth excavation is made to subinverse, the minus two layers of side wall in station of constructing,
The recessed longeron of bottom plate, bottom plate and connecting plate 13, minus two layers of reinforcement pillar 10；After bottom plate reaches design strength, in building up station
Negative one layer and minus two layer frame set temporary support column and full hall scaffold 24, then segmentation abolish, tunnel opening area building up station area
The side wall in domain.
As shown in Fig. 8 ~ 17, a kind of construction method for the connected structure for abutting existing transfer station on a large scale, including it is following
Step：
（ⅰ）Site preparation, builds that station stanchion is basic and embedded back-up sand steel pipe column 12 the construction later stage；As shown in Figure 8.
（ⅱ）Excavate on the soil body to newly-built structure top plate 21, cut building up station structural envelope structure 14 and agent structure top
Plate part concrete simultaneously retains its reinforcing bar, is implanted into reinforcing bar 18 in the implantation of building up station top plate, as shown in Figure 9.
（ⅲ）Excavate soil layer to newly-built structure top plate 21 under, laying the later stage build station top plate, beam, post reinforcing bar, apply with
Negative one layer reinforcement longeron and connecting plate 6, negative one layer reinforcement pillar 9 at existing structure connecting portion side wall position, and reserved steel bar connects
19 are refuted, movement joint 11 is set, casting concrete, completion is connected with building up station structure roof, treats that concrete strength reaches design
It is required that, top plate earth-covering is backfilled, station top surface recovers normal, as shown in Figure 10.
（ⅳ）Soil layer is excavated into newly-built structure under plate 22, the construction later stage builds plate in station, in existing building enclosure
Tick slot, plate bottom portion space in being filled using slightly expanded concrete beam 20, builds station and building up station building enclosure after connection,
Horizontal direction power transmission at plate in guarantee, as shown in figure 11.
（ⅴ）Plate above building up station structural envelope structure 14 in newly-built station is cut, is applied and existing structure connecting portion
Minus two layers of reinforcement longeron and connecting plate 7, negative one layer reinforcement longeron and connecting plate 6 and the steel for reserving minus two layers of reinforcement pillar at side wall position
Muscle connector 19, sets movement joint 11, and casting concrete, completion is connected with plate in building up station agent structure, as shown in figure 12.
（ⅵ）Treat step（ⅴ）Middle board concrete reach after design strength, excavate soil layer to newly-built structure bottom plate 23 under,
Construction newly-built structure bottom plate 23, the tick slot in building up station building enclosure, the construction recessed ring beam of back plate connections and plate 13, it is embedded
In building up station building enclosure, it is ensured that horizontal direction power transmission at bottom plate, as shown in figure 13.
（ⅶ）Newly-built station bottom plate above building up station building enclosure is cut, is applied and existing structure connecting portion side wall position
Place's bottom plate reinforcement longeron and connecting plate 8, minus two layers of reinforcement pillar 10 are put, movement joint 11 is set, casting concrete is completed and existing car
Station owner's body structure base slab is connected, as shown in figure 14.
（ⅷ）Temporary support column and full hall scaffold 24 are set up inside building up station, as shown in figure 15.
（ⅸ）After connected structure concrete strength reaches design requirement intensity, segmentation cuts existing structure negative one layer side
Wall, retains wall and beam column position reinforcing bar at reserved reinforcement pillar, applies back timber 1 at negative one layer hole, as shown in figure 16.
（ⅹ）After negative one layer back timber concrete reaches design requirement intensity, segmentation cuts the minus two layers of side wall of existing structure,
Retain wall and beam column position reinforcing bar at reserved reinforcement pillar, apply back timber 2 at minus two layers of hole, treat minus two layer concretes intensity knot
Temporary support column and full hall scaffold 24 are removed after to design requirement, completion is connected with existing A lines, as shown in figure 17.
Embodiment 1
In the design and construction for being used in certain subway Line 1 and No. 4 line transfer stops.Due to rail network adjustment, No. 4 lines and Line 1
Changed under the conditions of not reserving transfer at drum tower station, therefore need large area to abolish existing Line 1 side wall and carry out transfer connection.1
Number line is existing F3/B3 station, and No. 4 lines are the newly-built stop of underground two.Line 1 building enclosure uses digging hole filling pile, body junction
The long 210.7m of structure, width 23.05m, depth 21m box concrete structure.No. 4 line joining place foundation ditches wide 49.4m, long 112m.
Technical difficult points are：1. it is closely connected between main body open excavation section and existing Line 1 structure, such as take direct excavation pit
Then the structure to existing Line 1 can be adversely affected；2. the processing between new and old structure, including linking, change between concrete structure
Shape, which is seamed, puts with structurally waterproof etc.；3. large area abolishes Line 1 existing structure side wall and the structure at Line 1 station and operation will be produced
Raw certain influence, therefore how to refine the Design of Reinforcement for solving Line 1 structure and transformation will be to increase economic results in society, drop
The influence degree of low Line 1 operation is then most important.
After excessive kind of demonstration design, design and construction use inventive method illustrated herein.Building enclosure is using stake+anchor cable
Support form, it is 26m that lid, which digs segment length, and open cut breaks length for 86m.Site operation experience, Monitoring Data and building up station operation
Monitoring Data is fully proved：Can strictly it be controlled using newly-built structure lateral rigidity and layering interconnection technique using top-down invers method method
Building up station deformation gauge structure safety；Reinforce existing structure in advance using reinforced structure, set temporary support column, segmentation to abolish
The displacement that punches can be controlled, it is to avoid structure is destroyed；Embedding re-bar technique and reserved steel bar joint technology are ripe, can guarantee that construction quality；
It is small using static(al) cutting scheme noise, favorable environment protection and civilized construction.
The present invention can be widely popularized into the reconstruction and extension project of subway station, the especially suitable newly-built Station Project of large span,
It can make that engineering is safer, economy.
Claims (4)
1. a kind of connected structure for abutting existing transfer station on a large scale, includes the building up station and the newly-built car of B lines of A lines
Stand, the two joining place formation transfer station continuously punches on the side wall of A line building up station, formed and the newly-built station of B lines
The multiple passways communicated, it is characterised in that：The passway includes the hole at existing structure（0）, negative one layer hole at push up
Beam（1）, back timber at minus two layers of hole（2）, negative one layer hole at pillar（4）, pillar at minus two layers of hole（5）, axle power can be applied
Temporary support column and full hall scaffold（24）, at newly-built structure inside back-up sand steel pipe column（12）, steel pipe column slab column connect
Connect reinforcing ring（15）, steel pipe column reinforcement welding reinforcing ring（16）, steel pipe column baseplate reinforcing bar welding reinforcing ring（17）, back plate connections
Recessed ring beam and plate（13）, the temporary support column and full hall scaffold（24）In temporary support column be steel pipe support,
It is furnished with jack in the middle of it, can be put in time at side wall when removing side wall, steel pipe column reinforcement welding reinforcing ring（16）For steel
The annular slab of plate weld, newly-built station structure longeron and crossbeam reinforcing bar are welded on reinforcing ring, it is ensured that reinforcing steel bar bear；Bottom plate
The recessed ring beam in junction and plate（13）In the recessed ring beam of back plate connections be the beam that is poured under newly-built structure bottom plate, it can be supported
In existing building enclosure, complete horizontal direction power transmission and water expandable waterstop can be added inside（25）, strengthen waterproof slab
Ability.
2. a kind of connected structure for abutting existing transfer station on a large scale according to claim 1, it is characterised in that：It is described
The top plate of building up station, middle plate, building up station bottom plate（3）Place outside respectively with the cast-in-place reinforcement longeron of newly-built structure, the reinforcement
Longeron includes negative one layer reinforcement longeron and connecting plate（6）, minus two layers of reinforcement longeron and connecting plate（7）, bottom plate reinforcement longeron and connecting plate
（8）, movement joint（11）, implantation reinforcing bar（18）, cast-in-place negative one layer reinforcement pillar at the reinforcement longeron（9）, minus two layers of reinforcement post
Son（10）, pass through reinforcing bar connector during reverse hierarchical is built（19）Connect reinforcement pillar reinforcing bar.
3. a kind of connected structure for abutting existing transfer station on a large scale according to claim 1, it is characterised in that：It is described
Connected structure is according to site condition construction fender post, back-up sand steel tube column foundation（26）, back-up sand steel pipe column（12）, apply station negative one
Layer reinforcement longeron and connecting plate（6）Top plate connection is completed, passes through reinforcing bar connector（19）Reserved negative one layer reinforcement pillar（9）Reinforcing bar connects
Mouthful, after top plate reaches design strength, earthing is backfilled, successively earth excavation is made to subinverse, newly-built station negative one layer side wall of constructing,
Middle plate and minus two layers of reinforcement longeron and connecting plate（7）, negative one layer reinforcement pillar（9）, pass through reinforcing bar connector（19）It is reserved minus two layers
Reinforcement pillar（10）Reinforcing bar interface；After middle plate reaches design strength, successively earth excavation is made to subinverse, minus two layers of station of constructing
The recessed longeron of side wall, bottom plate, bottom plate and connecting plate（13）, minus two layers of reinforcement pillar（10）；After bottom plate reaches design strength,
Building up station negative one layer and minus two layer frame set temporary support column and full hall scaffold（24）, then segmentation abolish, tunnel opening area
The side wall in building up station region.
4. a kind of construction method for the connected structure for abutting existing transfer station on a large scale according to claim 1 ~ 3, it is special
Levy and be：Comprise the following steps：
（ⅰ）Site preparation, builds that station stanchion is basic and embedded back-up sand steel pipe column the construction later stage（12）；
（ⅱ）The soil body is excavated to newly-built structure top plate（21）On, cut building up station structural envelope structure（14）And agent structure top
Plate part concrete simultaneously retains its reinforcing bar, in building up station top plate implantation implantation reinforcing bar（18）；
（ⅲ）Soil layer is excavated to newly-built structure top plate（21）Under, laying the later stage build station top plate, beam, post reinforcing bar, apply with both
There are negative one layer reinforcement longeron and connecting plate at the side wall position of structural connection position（6）, negative one layer reinforcement pillar（9）, and reserved steel bar
Plug into（19）, movement joint is set（11）, casting concrete, completion be connected with building up station structure roof, treat that concrete strength reaches
To design requirement, top plate earth-covering is backfilled, station top surface recovers normal；
（ⅳ）Excavate soil layer plate into newly-built structure（22）Under, the construction later stage builds plate in station, is picked in existing building enclosure
Groove, uses slightly expanded concrete beam（20）Station and building up station building enclosure are built in filling after plate bottom portion space, connection,
Horizontal direction power transmission at plate in guarantee；
（ⅴ）Cut plate above building up station structural envelope structure in newly-built station（14）, apply and existing structure connecting portion side
Minus two layers of reinforcement longeron and connecting plate at wall displacement（7）, negative one layer reinforcement longeron and connecting plate（6）And reserve minus two layers of reinforcement pillar
Reinforcing bar connector（19）, movement joint is set（11）, casting concrete, completion be connected with plate in building up station agent structure；
（ⅵ）Treat step（ⅴ）Middle board concrete reach after design strength, excavate soil layer to newly-built structure bottom plate（23）Under, apply
Work newly-built structure bottom plate（23）, the tick slot in building up station building enclosure, the construct recessed ring beam of back plate connections and plate（13）, it is embedding
Enter in building up station building enclosure, it is ensured that horizontal direction power transmission at bottom plate；
（ⅶ）Cut newly-built station bottom plate above building up station building enclosure, apply with existing structure connecting portion side wall position
Bottom plate reinforcement longeron and connecting plate（8）, minus two layers of reinforcement pillar（10）, movement joint is set（11）, casting concrete, complete with it is existing
Station agent structure bottom plate connection；
（ⅷ）Temporary support column and full hall scaffold are set up inside building up station（24）；
（ⅸ）After connected structure concrete strength reaches design requirement intensity, segmentation cuts existing structure negative one layer side wall, protects
Wall and beam column position reinforcing bar at reserved reinforcement pillar are stayed, back timber at negative one layer hole is applied（1）；
（ⅹ）After negative one layer back timber concrete reaches design requirement intensity, segmentation cuts the minus two layers of side wall of existing structure, retains
Wall and beam column position reinforcing bar at reserved reinforcement pillar, apply back timber at minus two layers of hole（2）, treat that minus two layer concretes intensity knot is arrived
Temporary support column and full hall scaffold are removed after design requirement（24）, complete to be connected with existing A lines.
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| CN201710545302.0A CN107119711B (en) | 2017-07-06 | 2017-07-06 | Connecting structure for large-range adjacent existing transfer station and construction method |
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| CN201710545302.0A CN107119711B (en) | 2017-07-06 | 2017-07-06 | Connecting structure for large-range adjacent existing transfer station and construction method |
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| CN107119711B CN107119711B (en) | 2022-09-06 |
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| CN116290102A (en) * | 2023-05-17 | 2023-06-23 | 中国铁路设计集团有限公司 | Construction method for layer-adding transformation of operation underground station |
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| CN116464098A (en) * | 2023-06-20 | 2023-07-21 | 中国铁路设计集团有限公司 | Construction method of continuous ultra-wide side-leaning hole-opening structure of subway station board |
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