CN110409487A - A kind of pile foundation underpinning structure for city tunnel newly-built below bridge - Google Patents
A kind of pile foundation underpinning structure for city tunnel newly-built below bridge Download PDFInfo
- Publication number
- CN110409487A CN110409487A CN201910746278.6A CN201910746278A CN110409487A CN 110409487 A CN110409487 A CN 110409487A CN 201910746278 A CN201910746278 A CN 201910746278A CN 110409487 A CN110409487 A CN 110409487A
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- Prior art keywords
- pile
- reinforcing
- bridge pier
- bridge
- pile foundation
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/48—Foundations inserted underneath existing buildings or constructions
Abstract
The present invention relates to constructing tunnel field more particularly to a kind of pile foundation underpinning structures for city tunnel newly-built below bridge comprising: bridge pier, reinforces boom device, supporting beam and the fender post being arranged in pairs at the underpinned pile being arranged in pairs；Two adjacent fender posts are symmetrically disposed on the two sides of bridge pier；Boom device is reinforced to connect with bridge pier；Underpinned pile is distributed in the opposite sides of bridge pier and is placed between the fender post being arranged in pairs, and the upper end bracing reinforcement boom device of underpinned pile and lower end implantation ground end；The both ends of supporting beam are separately connected corresponding fender post and connect with boom device is reinforced to form frame structure.Pile foundation underpinning structure of the invention includes by supporting beam, fender post and reinforcing boom device the pattern foundation pit supporting structure frame and underpinned pile that form, existing bridge pier is protected to underpining for bridge pier existing under bridge by underpinned pile, consequently facilitating building city tunnel.Pattern foundation pit supporting structure frame and underpinned pile bear load jointly, improve the safety and stability of pile foundation underpinning structure.
Description
Technical field
The present invention relates to constructing tunnel field more particularly to a kind of pile foundation underpinnings for city tunnel newly-built below bridge
Structure.
Background technique
With the continuous development of China's economy, the continuous improvement of living standards of the people.In urban infrastructure construction
Cheng Zhong, the scale and quantity of city tunnel are also being continuously increased.It is following then be newly built tunnels and existing Urban Bridge, across
Interference between Jiang Qiaoliang is also increasing year by year, and therefore, it is necessary to exclude bridge pile foundation interference using bridge pier underpinning technique.
Existing bridge pier underpinning technique is broadly divided into two classes by the mode of underpining, and passively to underpin, one kind underpins one kind for active.
Passive underpinning technique refers to that original bridge pier load as the deformation of underpinning structure is passively transferred on newly-built underpinned pile, is being constructed
It is unable to control and adjusts in the process deformation and the load of bridge pier structure, deformation is relatively large, therefore, in the actual construction process very
It is few to underpin mode using what is passively underpined.Active underpinning technique refers to that dynamic regulation underpins deformation and the load of system, it is ensured that quilt
The deformation for underpining bridge pier can be fully controlled in the construction process, and the underpinning structure of active underpinning technique is mainly stake-beam
It underpins, principle is to underpin girder construction with newly-built by bridge pier, be transferred on underpinned pile, then carry out again existing bridge load
Constructing tunnel below bridge, therefore underpinned pile needs to bear original all bridge loads, will cause in the construction process
Underpinned pile carrying is overweight.Current existing bridge pier underpins scheme, is independently from other than tunnel foundation pit supporting system, only leans on underpinned pile
Bridge load is born, the problems such as this has been resulted in that underpinned pile scale is excessive, underpin crossbeam, stringer off size reason, thus plus
The big cost of investment.
Summary of the invention
(1) technical problems to be solved
The present invention provides a kind of for creating the pile foundation underpinning structure of city tunnel below bridge, it is intended to solve
There is the problem of interfering when creating city tunnel below bridge with bridge pier.
(2) technical solution
The main technical schemes that in order to achieve the above object, the present invention uses include: bridge pier, are arranged in pairs underpinned pile,
Reinforce boom device, more supporting beams and the fender post being arranged in pairs；Two adjacent fender posts are symmetrically disposed on the bridge
The two sides of stake；The reinforcing boom device is connect with the bridge pier；The underpinned pile is distributed in the opposite sides of the bridge pier and sets
Between the fender post being arranged in pairs, and the upper end of the underpinned pile supports the reinforcing boom device and lower end implantation ground
Bottom；The both ends of the supporting beam are separately connected the corresponding fender post and connect with the reinforcing boom device to form frame
Structure.
Preferably, the reinforcing boom device includes more reinforcing crossmembers, at least two reinforcing stringers and multiple lifting bodies；
The reinforcing crossmember connect with the bridge pier and is arranged perpendicular to the axis of the bridge pier；The reinforcing stringer passes through described respectively
Lifting body supports the end of the reinforcing crossmember；The more underpinned piles support the reinforcing stringer and the reinforcing stringer hangs down
Directly it is arranged in the reinforcing crossmember.
Preferably, the reinforcing boom device further includes at least two first linking beams；The first linking beam connection is adjacent
Two reinforcing crossmembers, be provided at least two described first be spaced apart between two adjacent reinforcing crossmembers
Linking beam.
Preferably, the lifting body is the jack with self-locking function.
Preferably, the supporting beam is vertical with the fender post connect, and the more supporting beams are spaced apart, and adjacent two
Spacing between the supporting beam is equal with the spacing between the two neighboring bridge pier, and the supporting beam is also connected with the reinforcing
Stringer, the supporting beam, the reinforcing stringer and the fender post are interconnected so as to form frame structure.
Preferably, the pile foundation underpinning structure further includes at least two second linking beams；Second linking beam successively connects
Connect the underpinned pile positioned at same one side of the bridge pier.
Preferably, the pile foundation underpinning structure further includes more floor stringers, and the floor stringer is located at adjacent described go along with sb. to guard him
Between stake and it is vertical with the fender post connect, and second linking beam supports the floor stringer.
Preferably, the pile foundation underpinning structure further includes the water-seal pile being arranged in pairs, the water-seal pile and the fender post
Connect and be set to the outside of the fender post.
(3) beneficial effect
The beneficial effects of the present invention are: the pile foundation underpinning structure for creating city tunnel below bridge of the invention includes
By supporting beam, fender post and reinforce boom device the pattern foundation pit supporting structure frame and underpinned pile that form, by underpinned pile under bridge both
There is underpining to protect existing bridge pier for bridge pier, removes bridge pier to the interference in tunnel is built, to build city tunnel.Pattern foundation pit supporting structure
Frame and underpinned pile bear load, cooperative bearing jointly, so that the load being loaded on underpinned pile reduces, prevent underpinned pile from carrying
It is overweight, to improve the safety and stability of pile foundation underpinning structure, decrease the scale and construction investment of underpinned pile.This
Outside, by the way that the first linking beam is arranged, the overall stiffness for reinforcing boom device is increased, decreases the scale of reinforcing crossmember, and assist
With the stress of multiple bridge piers, coordinate its deformation more.By setting floor stringer and the second linking beam, increase reinforce stringer with
The rigidity of underpinned pile decreases the scale for reinforcing stringer.It, can real-time control work progress using the jack with self-locking function
In bridge pier deformation so that bridge pier underpinning method is more controllable.
Detailed description of the invention
Fig. 1 is the cross-sectional configuration signal of the pile foundation underpinning structure for creating city tunnel below bridge of the invention
Figure；
Fig. 2 is the structure top view of reinforcing crossmember position in Fig. 1；
Fig. 3 is the structure top view that stringer position is reinforced in Fig. 1；
Fig. 4 is the left view schematic cross-section for reinforcing boom device and underpinned pile etc. in Fig. 1.
[description of symbols]
1: bridge pier；2: underpinned pile；3: reinforcing boom device；31: reinforcing crossmember；32: reinforcing stringer；33: lifting body；34:
First linking beam；4: supporting beam；5: fender post；6: the second linking beams；7: floor stringer；8: water-seal pile.
Specific embodiment
In order to preferably explain the present invention, in order to understand, with reference to the accompanying drawing, by specific embodiment, to this hair
It is bright to be described in detail.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, if should
When particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as
Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple " contain
Justice is at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. shall be understood in a broad sense,
For example, " fixation " may be a fixed connection, it may be a detachable connection, or integral；It can be mechanical connection, be also possible to
Electrical connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
The present invention provides a kind of pile foundation underpinning structure for city tunnel newly-built below bridge, as shown in Figure 1 and Figure 4,
It includes bridge pier 1, the underpinned pile being arranged in pairs 2, reinforces boom device 3, more supporting beams 4 and the fender post 5 being arranged in pairs；It is adjacent
Two fender posts 5 be symmetrically disposed on the two sides of bridge pier 1；Boom device 3 is reinforced to connect with bridge pier 1；Underpinned pile 2 is distributed in bridge pier 1
Opposite sides and be placed between the fender post 5 being arranged in pairs, and the upper end bracing reinforcement boom device 3 of underpinned pile 2 and lower end are planted
Enter ground end；The corresponding fender post 5 in the both ends of supporting beam 4 and with reinforce boom device 3 connect to form frame structure.
Wherein, underpinned pile 2 be vertically extend and it is vertical with bridge floor, underpinned pile 2 be used for bear bridge floor application
Load, while bracing reinforcement boom device 3.Provided by the present invention for creating the pile foundation underpinning structure packet of city tunnel below bridge
The pattern foundation pit supporting structure frame and underpinned pile 2 being made of supporting beam 4, fender post 5 and reinforcing boom device 3 are included, by underpinned pile 2 to bridge
Bridge pier 1 underpins to protect bridge pier 1 under beam, removes bridge pier 1 to the interference in tunnel is built, to build city tunnel.Foundation pit branch
It protects frame and underpinned pile 2 bears load, cooperative bearing jointly, so that the load being loaded on underpinned pile 2 reduces, prevent underpinned pile
2 carryings are overweight, to improve the safety and stability of pile foundation underpinning structure, decrease the scale and reduction of underpinned pile 2
Construction investment.
It should be noted that pile foundation underpinning structure of the invention is suitable for interfering the unidirectional bridge for building city tunnel
The case where 1 quantity of stake is 1~6, when the quantity of bridge pier 1 is 1, it is only necessary to 1 reinforcing crossmember, 31,2 reinforcing stringers 32,
25,2 water-seal piles 8 of the fender post of supporting beam 4,2 of lifting body 33,1 and 2 underpinned piles 2 reinforce stringer 32, support
Beam 4 connects integral to form frame structure and combine with underpinned pile 2 with fender post 5, improves the steady of pile foundation underpinning structure
Qualitative and stability.
In a preferred embodiment, the quantity of bridge pier 1 is 4, as shown in Figure 1, Figure 2 and Figure 3, reinforces boom device
3 include more reinforcing crossmembers 31, at least two reinforcing stringers 32 and multiple lifting bodies 33；Reinforcing crossmember 31 is connect with bridge pier 1
And it is arranged perpendicular to the axis of bridge pier 1；Reinforce the end that stringer 32 passes through 33 bracing reinforcement crossbeam 31 of lifting body respectively；More
2 bracing reinforcement stringer 32 of underpinned pile and reinforce stringer 32 perpendicular to reinforcing crossmember 31 be arranged.Reinforcing boom device 3 is pile foundation underpinning knot
The important component of structure, reinforcing crossmember 31 are directly connected to bridge pier 1, there is certain fixed function, and lifting body 33 is with certainly
The jack of lock function, can the bridge pier 1 in real-time control work progress deform so that bridge pier underpinning method is more controllable, jacking
Model and jacking distance of mechanism 33 etc. should be calculated according to the load of bridge to determine.
Wherein, the mode that bar planting is all made of between reinforcing crossmember 31 and bridge pier 1, between reinforcing stringer 32 and underpinned pile 2 connects
It connects.Bar planting is called effective reinforcement, is that anchoring utilizes structure glue locking key grip force after a kind of reinforcing bar on building structure aseismatic reinforcing engineering
The interconnection technique of effect is the optimal selection of structure bar planting reinforcing with heavy load fastening applications.Reinforcing crossmember 31 and bridge pier 1 it
Between bar planting the step of are as follows: first drill on bridge pier 1, then cleaning eye, reinjects high-strength anchoring adhesive, is then inserted into reinforcing bar, to height
Placing concrete after strong bar planting adhesive curing；The step of reinforcing bar planting between stringer 32 and underpinned pile 2 are as follows: first bored on underpinned pile 2
Hole, then cleaning eye, reinjects high-strength anchoring adhesive, is then inserted into reinforcing bar, the placing concrete after high-strength bar planting adhesive curing.
In addition, as depicted in figs. 1 and 2, reinforcing boom device 3 further includes at least two first linking beams 34, the first linking beam
34 can be used constructional reinforcement；First linking beam 34 connects two adjacent reinforcing crossmembers 31, two adjacent reinforcing crossmembers 31 it
Between be provided at least two first linking beams 34 being spaced apart.By the way that the first linking beam 34 is arranged, increases and reinforce boom device 3
Overall stiffness, decrease the scale of reinforcing crossmember 31, and cooperate with the stress of multiple bridge piers 1, coordinate its deformation more.
Further, as shown in Figure 1 and Figure 4, supporting beam 4 is vertical with fender post 5 connect, and more supporting beams 4 are spaced apart,
Spacing between adjacent two supporting beams 4 is equal with the spacing between two neighboring bridge pier 1, and supporting beam 4 is also connected with reinforcing stringer
32, supporting beam 4, reinforcing stringer 32 and fender post 5 can be interconnected so as to form frame structure, form frame structure further
The stability and safety for improving pile foundation underpinning structure have further ensured the safety of construction personnel, reinforce stringer 32, support
Beam 4 and fender post 5 have been also subjected to load, so that the load being loaded on underpinned pile 2 reduces, to prevent underpinned pile 2 from carrying
It is overweight, and then the scale of underpinned pile 2 is reduced, reduce construction investment cost.
In addition, pile foundation underpinning structure of the invention further includes that at least two second linking beams 6, the second linking beam 6 can be used
Constructional reinforcement；Second linking beam 6 is sequentially connected the underpinned pile 2 positioned at same one side of bridge pier 1；Second linking beam 6 and underpinned pile 2
It is connected by the way of bar planting, between the second linking beam 6 and underpinned pile 2 the step of bar planting are as follows: first drill on underpinned pile 2, so
Cleaning eye afterwards reinjects high-strength anchoring adhesive, is then inserted into reinforcing bar, the placing concrete after high-strength bar planting adhesive curing.Pass through setting
The underpinned pile 2 on all same one side positioned at bridge pier 1 is linked to be entirety, increases and underpin by the second linking beam 6, the second linking beam 6
Rigidity between stake 2, so that the deformation of underpinned pile 2 is small, so that the rigidity of underpinned pile 2 increases, to improve the peace of underpinned pile 2
Quan Xing.
Further, pile foundation underpinning structure of the invention further includes more floor stringers 7, and floor stringer 7 is located at adjacent go along with sb. to guard him
Stake 5 between and it is vertical with fender post 5 connect, and the second linking beam 6 support floor stringer 7；It second linking beam 6, floor stringer 7 and goes along with sb. to guard him
Stake 5 is linked to be entirety, the stability of pile foundation underpinning structure is further increased, so that work progress is more controllable.
In addition, as shown in Figure 1, pile foundation underpinning structure of the invention further includes the water-seal pile 8 being arranged in pairs, water-seal pile 8 with
Fender post 5 connects and is set to the outside of fender post 5；Water-seal pile 8 is used for waterproof, can eliminate rainwater for the dry of work progress
It disturbs.
Wherein, the sequence of construction of pile foundation underpinning structure of the invention are as follows:
Step 1: construction underpinned pile 2, multiple underpinned piles 2 are arranged in pairs in the two sides of bridge pier 1, a bridge pier 1 corresponding two
A underpinned pile 2；
Step 2: construction fender post 5 and water-seal pile 8；
Step 3: reinforcing stringer 32, is first set to the upper end of underpinned pile 2, then by construction reinforcement stringer 32 and supporting beam 4
Construction Support beam 4；
Step 4: reinforcing crossmember 31, first connect with bridge pier 1, then applies by construction reinforcement crossbeam 31 and the first linking beam 34
The first linking beam of work 34；
Step 5: in reinforcing crossmember 31 and reinforcing setting lifting body 33 between stringer 32, applies in lifting body 33 and press
After power, then excavation pit；
Step 6: when being excavated at 7 position of floor stringer, the second linking beam 6 of first constructing, then floor stringer 7 of constructing.If excavating deep
Degree is relatively deep when needing multiple tracks floor stringer 7, then repeatedly the 6th step, until excavation of foundation pit is completed.
It is to be appreciated that describing the skill simply to illustrate that of the invention to what specific embodiments of the present invention carried out above
Art route and feature, its object is to allow those skilled in the art to can understand the content of the present invention and implement it accordingly, but
The present invention is not limited to above-mentioned particular implementations.All various changes made within the scope of the claims are repaired
Decorations, should be covered by the scope of protection of the present invention.
Claims (8)
1. a kind of for creating the pile foundation underpinning structure of city tunnel below bridge, which is characterized in that the pile foundation underpinning structure
Underpinned pile, reinforcing boom device, more supporting beams and the fender post being arranged in pairs for including: bridge pier, being arranged in pairs；Adjacent two
The fender post is symmetrically disposed on the two sides of the bridge pier；The reinforcing boom device is connect with the bridge pier；The underpinned pile point
It is distributed in the opposite sides of the bridge pier and is placed between the fender post being arranged in pairs, and the upper end of the underpinned pile supports institute
It states and reinforces boom device and lower end implantation ground end；The both ends of the supporting beam be separately connected the corresponding fender post and with it is described
Boom device connection is reinforced to form frame structure.
2. as described in claim 1 for creating the pile foundation underpinning structure of city tunnel below bridge, it is characterised in that: described
Reinforcing boom device includes more reinforcing crossmembers, at least two reinforcing stringers and multiple lifting bodies；The reinforcing crossmember with it is described
Bridge pier connects and is arranged perpendicular to the axis of the bridge pier；The reinforcing stringer passes through respectively to be added described in the lifting body support
Gu the end of crossbeam；The more underpinned piles support the reinforcing stringer and the reinforcing stringer is set perpendicular to the reinforcing crossmember
It sets.
3. as claimed in claim 2 for creating the pile foundation underpinning structure of city tunnel below bridge, it is characterised in that: described
Reinforcing boom device further includes at least two first linking beams；First linking beam connects two adjacent reinforcing crossmembers,
At least two first linking beams being spaced apart are provided between two adjacent reinforcing crossmembers.
4. as claimed in claim 2 for creating the pile foundation underpinning structure of city tunnel below bridge, it is characterised in that: described
Lifting body is the jack with self-locking function.
5. as claimed in claim 2 for creating the pile foundation underpinning structure of city tunnel below bridge, it is characterised in that: described
Supporting beam is vertical with the fender post to be connect, and the more supporting beams are spaced apart, between adjacent two supporting beams between
Equal away from the spacing between the two neighboring bridge pier, the supporting beam is also connected with the reinforcing stringer, the supporting beam, institute
It states reinforcing stringer and the fender post is interconnected so as to form frame structure.
6. the pile foundation underpinning structure for city tunnel newly-built below bridge as described in any one of claim 1-5,
Be characterized in that: the pile foundation underpinning structure further includes at least two second linking beams；Second linking beam, which is sequentially connected, to be located at
The underpinned pile on same one side of the bridge pier.
7. as claimed in claim 6 for creating the pile foundation underpinning structure of city tunnel below bridge, it is characterised in that: described
Pile foundation underpinning structure further includes more floor stringers, the floor stringer between the adjacent fender post and with the fender post
Vertical connection, and second linking beam supports the floor stringer.
8. the pile foundation underpinning structure for city tunnel newly-built below bridge as described in any one of claim 1-5,
Be characterized in that: the pile foundation underpinning structure further includes the water-seal pile being arranged in pairs, the water-seal pile connect with the fender post and
It is set to the outside of the fender post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746278.6A CN110409487A (en) | 2019-08-13 | 2019-08-13 | A kind of pile foundation underpinning structure for city tunnel newly-built below bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746278.6A CN110409487A (en) | 2019-08-13 | 2019-08-13 | A kind of pile foundation underpinning structure for city tunnel newly-built below bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110409487A true CN110409487A (en) | 2019-11-05 |
Family
ID=68367296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910746278.6A Pending CN110409487A (en) | 2019-08-13 | 2019-08-13 | A kind of pile foundation underpinning structure for city tunnel newly-built below bridge |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733866A (en) * | 2020-05-16 | 2020-10-02 | 江苏瑞沃建设集团有限公司 | Pile foundation underpinning structure for newly-built urban tunnel below bridge |
| CN112329107A (en) * | 2020-11-05 | 2021-02-05 | 中铁二院工程集团有限责任公司 | Bridge span type bearing structure of cross tunnel proximity region and calculation method |
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| US5217325A (en) * | 1991-06-11 | 1993-06-08 | Freeman Iii Thomas R | System for underpinning a building |
| CN201268854Y (en) * | 2008-09-19 | 2009-07-08 | 天津市市政工程设计研究院 | Active underpinning structure of hyperstation foot stall or pile foundation |
| CN105926963A (en) * | 2016-05-04 | 2016-09-07 | 浙江省建筑设计研究院 | Vertical supporting method of underground top-down storey addition of existing high-rise building |
| CN108330845A (en) * | 2018-01-26 | 2018-07-27 | 中铁隧道集团二处有限公司 | A kind of reinforcement means of curve bridge underpinning |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5217325A (en) * | 1991-06-11 | 1993-06-08 | Freeman Iii Thomas R | System for underpinning a building |
| CN201268854Y (en) * | 2008-09-19 | 2009-07-08 | 天津市市政工程设计研究院 | Active underpinning structure of hyperstation foot stall or pile foundation |
| CN105926963A (en) * | 2016-05-04 | 2016-09-07 | 浙江省建筑设计研究院 | Vertical supporting method of underground top-down storey addition of existing high-rise building |
| CN108330845A (en) * | 2018-01-26 | 2018-07-27 | 中铁隧道集团二处有限公司 | A kind of reinforcement means of curve bridge underpinning |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733866A (en) * | 2020-05-16 | 2020-10-02 | 江苏瑞沃建设集团有限公司 | Pile foundation underpinning structure for newly-built urban tunnel below bridge |
| CN112329107A (en) * | 2020-11-05 | 2021-02-05 | 中铁二院工程集团有限责任公司 | Bridge span type bearing structure of cross tunnel proximity region and calculation method |
| CN112329107B (en) * | 2020-11-05 | 2022-05-06 | 中铁二院工程集团有限责任公司 | Bridge span type bearing structure of cross tunnel proximity region and calculation method |
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Application publication date: 20191105 |