CN109854280A - Core Soil bearing-type support system and its construction method for tunneling subway station - Google Patents
Core Soil bearing-type support system and its construction method for tunneling subway station Download PDFInfo
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- CN109854280A CN109854280A CN201910163857.8A CN201910163857A CN109854280A CN 109854280 A CN109854280 A CN 109854280A CN 201910163857 A CN201910163857 A CN 201910163857A CN 109854280 A CN109854280 A CN 109854280A
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- core soil
- side wall
- pilot tunnel
- stepped ramp
- steel frame
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The present invention relates to a kind of Core Soil bearing-type support system and its construction method for tunneling subway station, the support system includes positioned at the reserved stepped ramp type Core Soil left and right sides and symmetrically arranged side wall pilot tunnel curved support, pilot tunnel horizontal brace, side wall grid steel frame and lower grid steelframe and the vault fashioned iron positioned at reserved stepped ramp type Core Soil top directly supports and vault grid steel frame；It is symmetrically arranged with rock shoulder along tunnel excavation direction at left and right sides of the reserved stepped ramp type Core Soil, the rock shoulder and the corner on reserved stepped ramp type Core Soil top are equipped with L-type angle steel backing plate along direction is excavated；Side wall pilot tunnel curved support and pilot tunnel horizontal brace at left and right sides of the reserved stepped ramp type Core Soil intersect at L-type angle steel backing plate, and are fixedly connected respectively with the L-type angle steel backing plate.The setting of L-type angle steel backing plate in the present invention increases side wall pilot tunnel curved support and pilot tunnel horizontal brace and Rock And Soil contact area, reduces compression and concentrates, and ensure that support system stablizes safety.
Description
Technical field
The present invention relates to railway traffic engineering fields, and in particular to a kind of Core Soil bearing-type for tunneling subway station
Support system and its construction method.
Background technique
Two side-wall pilot tunnel is widely used in bored tunnel construction, the large span and poor geological conditions situations such as
Under, with high security, the advantages that settlement Control is good, but base tunnel quantity is more, and upper and lower pilot tunnel temporary support needs to be closed, construction effect
Rate is low, construction quality be difficult to control, tear open support risk it is larger, construction cost is higher.
Summary of the invention
For the above-mentioned technical problems in the prior art, the present invention provides a kind of core for tunneling subway station
Native bearing-type support system and its construction method.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of Core Soil bearing-type support system for tunneling subway station, the support system include being located at reserved platform
At left and right sides of rank type Core Soil and symmetrically arranged side wall pilot tunnel curved support, pilot tunnel horizontal brace, side wall grid steel frame and lower part
Grid steel frame and vault fashioned iron positioned at reserved stepped ramp type Core Soil top directly support and vault grid steel frame；
Rock shoulder is symmetrically arranged with along tunnel excavation direction at left and right sides of the reserved stepped ramp type Core Soil, the rock shoulder and reserved
The corner on stepped ramp type Core Soil top is equipped with L-type angle steel backing plate along direction is excavated；
Side wall pilot tunnel curved support and pilot tunnel horizontal brace at left and right sides of the reserved stepped ramp type Core Soil intersect at L-type angle
Billet, and be fixedly connected respectively with the L-type angle steel backing plate；
Side wall pilot tunnel curved support, pilot tunnel horizontal brace and side wall grid steel at left and right sides of the reserved stepped ramp type Core Soil
Frame is respectively enclosed to one side wall pilot tunnel, the pilot tunnel horizontal brace and lower grid steelframe at left and right sides of the reserved stepped ramp type Core Soil point
Do not surround a lower part pilot tunnel with reserved stepped ramp type Core Soil and bottom excavation face, the upper surface of the reserved stepped ramp type Core Soil,
Vault grid steel frame and the side wall pilot tunnel curved support of the left and right sides surround a middle drift.
Further, the vault fashioned iron directly supports the upper surface middle part for being vertically positioned at reserved stepped ramp type Core Soil, and along tunnel
Road excavates direction setting, and the top that the vault fashioned iron directly supports is fixedly connected with vault grid steel frame, bottom end and reserved stepped ramp type
The upper surface of Core Soil abuts.
Further, the vault grid steel frame is fixedly connected with the side wall grid steel frame at left and right sides of it, the left and right
The side wall grid steel frame of two sides is fixedly connected with the lower grid steelframe of its underpart respectively, the vault grid steel frame and its left and right
The side wall grid steel frame and lower grid steelframe of two sides collectively form an arch overall structure.
Further, the side wall grid steel frame, lower grid steelframe and vault grid steel frame pass through lock foot anchoring stock with
Surrounding wall is fixedly connected；
The lower part of the side wall pilot tunnel curved support is fixedly connected by lock foot anchoring stock with reserved stepped ramp type Core Soil.
Further, the support system further includes being set at left and right sides of the reserved stepped ramp type Core Soil and being located at rock
Shoulder is with the bolt-spary supports of lower portion.
Further, the point of intersection of the side wall pilot tunnel curved support and side wall grid steel frame is laid with prestressed anchor.
Further, the upper surface of the reserved stepped ramp type Core Soil and vault are at a distance of 3~5m.
The present invention also provides a kind of construction methods of Core Soil bearing-type support system for tunneling subway station, including
Following steps:
Step 1: excavating the side wall pilot tunnel of top two sides, lay L-type angle steel backing plate, set up side wall grid steel frame, side wall is led
Hole curved support and pilot tunnel horizontal brace；
Step 2: excavating the lower part pilot tunnel of two sides, reserve the rock shoulder portion of reserved stepped ramp type Core Soil, set up lower part lattice
Grid steelframe；
Step 3: excavating the middle drift on top, set up vault grid steel frame and directly supportted with vault fashioned iron；
Step 4: prestressed anchor is laid in the point of intersection of side wall pilot tunnel curved support and side wall grid steel frame,
Step 5: removing side wall pilot tunnel curved support, vault fashioned iron directly supports and pilot tunnel horizontal brace；
Step 6: construction crown and two lining structure of stalk；
Step 7: excavating reserved stepped ramp type Core Soil, two lining structure of station inverted arch of constructing.
It further, further include the rock shoulder in reserved stepped ramp type Core Soil in step 2 with lower portion construction bolt-spary supports.
Compared with prior art, the invention has the benefit that the present invention is in rock shoulder and reserved stepped ramp type Core Soil top
Corner along excavate direction be laid with L-type angle steel backing plate, increase side wall pilot tunnel curved support and pilot tunnel horizontal brace and Rock And Soil
Contact area reduces compression and concentrates, and ensure that support system stablizes safety.
Detailed description of the invention
Fig. 1 is a kind of Core Soil bearing-type support system for tunneling subway station involved in the embodiment of the present invention
Structural schematic diagram；
In figure:
1- side wall pilot tunnel；The lower part 2- pilot tunnel；3- middle drift；4- reserves stepped ramp type Core Soil；5- side wall pilot tunnel curved support；
6- pilot tunnel horizontal brace；7-L type angle steel backing plate；8- side wall grid steel frame；9- lower grid steelframe；10- vault grid steel frame；11-
Vault fashioned iron directly supports；12- prestressed anchor；13- lock foot anchoring stock；14- crown and two lining structure of stalk；Two lining structure of 15- inverted arch；
16- rock shoulder.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
The present embodiment is related to a kind of Core Soil bearing-type support system for tunneling subway station, referring to Fig.1, the branch
Watch box system includes being located at reserved 4 left and right sides of stepped ramp type Core Soil and symmetrically arranged side wall pilot tunnel curved support 5, pilot tunnel level
Support 6, side wall grid steel frame 8 and lower grid steelframe 9 and the vault fashioned iron positioned at reserved 4 top of stepped ramp type Core Soil directly support 11
With vault grid steel frame 10；
4 left and right sides of reserved stepped ramp type Core Soil is symmetrically arranged with rock shoulder 16, the rock shoulder 16 along tunnel excavation direction
L-type angle steel backing plate 7 is equipped with along direction is excavated with the corner on reserved 4 top of stepped ramp type Core Soil；
The side wall pilot tunnel curved support 5 and pilot tunnel horizontal brace 6 of 4 left and right sides of reserved stepped ramp type Core Soil intersect at L
Type angle steel backing plate 7, and be fixedly connected respectively with the L-type angle steel backing plate 7；
Side wall pilot tunnel curved support 5, pilot tunnel horizontal brace 6 and the side wall lattice of 4 left and right sides of reserved stepped ramp type Core Soil
Grid steelframe 8 is respectively enclosed to one side wall pilot tunnel 1, the pilot tunnel horizontal brace 6 and lower part lattice of reserved 4 left and right sides of stepped ramp type Core Soil
Grid steelframe 9 surrounds a lower part pilot tunnel 2, the reserved stepped ramp type core with reserved stepped ramp type Core Soil 4 and bottom excavation face respectively
Upper surface, vault grid steel frame 10 and the side wall pilot tunnel curved support 5 of the left and right sides of soil 4 surround a middle drift 3.
The present embodiment is laid with L-type angle steel along direction is excavated in the corner on rock shoulder 16 Yu reserved 4 top of stepped ramp type Core Soil
Backing plate 7 increases side wall pilot tunnel curved support 5 and pilot tunnel horizontal brace 6 and Rock And Soil contact area, reduces compression and concentrates, protects
That has demonstrate,proved support system stablizes safety.
In addition, preferably, in one particular embodiment of the present invention, the vault fashioned iron directly support 11 be vertically positioned at it is reserved
The upper surface middle part of stepped ramp type Core Soil 4, and be arranged along tunnel excavation direction, the vault fashioned iron directly supports 11 top and vault
Grid steel frame 10 is fixedly connected, and bottom end is abutted with the upper surface of reserved stepped ramp type Core Soil 4.
In addition, preferably, in one particular embodiment of the present invention, the vault grid steel frame 10 and its left and right sides
Side wall grid steel frame 8 be fixedly connected, the side wall grid steel frame 8 of the left and right sides lower grid steelframe with its underpart respectively
9 are fixedly connected, the vault grid steel frame 10 and the side wall grid steel frame 8 and the common structure of lower grid steelframe 9 at left and right sides of it
At an arch overall structure.
In addition, preferably, in one particular embodiment of the present invention, the top of the side wall pilot tunnel curved support 5 with
Side wall grid steel frame 8 is fixedly connected, and bottom end is fixedly connected with pilot tunnel horizontal brace 6；It is led with side wall one end of the pilot tunnel horizontal brace 6
The bottom end of hole curved support 5 is fixedly connected, and the other end is fixedly connected with side wall grid steel frame 8；The vault fashioned iron directly supports 11
Top is fixedly connected with vault grid steel frame 10, and bottom is abutted with the upper surface of reserved stepped ramp type Core Soil 4；Preferably, above-mentioned
Be fixedly connected can be to be bolted.
It should be noted that the side wall pilot tunnel curved support 5, pilot tunnel horizontal brace 6, side wall grid steel frame 8, lower grid
The specific structure that steelframe 9, vault grid steel frame 10 and vault fashioned iron directly support 11 is all made of existing technological means design, this
Place repeats no more.
In addition, preferably, in one particular embodiment of the present invention, the side wall grid steel frame 8, lower grid steelframe
9 and vault grid steel frame 10 be fixedly connected by lock foot anchoring stock 13 with surrounding wall；
The lower part of the side wall pilot tunnel curved support 5 is fixedly connected by lock foot anchoring stock 13 with reserved stepped ramp type Core Soil 4.
In addition, preferably, in one particular embodiment of the present invention, the support system further include be set to it is described pre-
It stays 4 left and right sides of stepped ramp type Core Soil and is located at rock shoulder 16 with the bolt-spary supports of lower portion.
The present embodiment takes bolt-spary supports to the rock shoulder 16 of the reserved stepped ramp type Core Soil 4 with lower portion, enhance with
Reserved support strength of the stepped ramp type Core Soil 4 as support construction；Meanwhile using reserved stepped ramp type Core Soil 4 as support, reduce
Supported amount, simplifies construction way, has saved the support cost of lower part pilot tunnel 2, effectively increased construction efficiency.
In addition, preferably, in one particular embodiment of the present invention, the side wall pilot tunnel curved support 5 and side wall lattice
The point of intersection of grid steelframe 8 is laid with prestressed anchor 12.
The present embodiment uses 12 generation of prestressed anchor in the point of intersection of side wall grid steel frame 8 and side wall pilot tunnel curved support 5
For traditional lock foot anchoring stock, is acted on anchor drawing and replace support, effectively evaded branch collapsing risk at the beginning of when tearing support open.
In addition, preferably, in one particular embodiment of the present invention, the upper surface of the reserved stepped ramp type Core Soil 4
With vault at a distance of 3~5m.
It is closer apart from vault that 4 upper surface of stepped ramp type Core Soil is reserved in the present embodiment, not only provides operating platform for construction, but also
Temporary support length can be effectively reduced, ensures that face safety and stability while saving project cost.
The present embodiment additionally provides a kind of construction method of Core Soil bearing-type support system for tunneling subway station,
The following steps are included:
Step 1: excavating the side wall pilot tunnel 1 of top two sides, lay L-type angle steel backing plate 7, set up side wall grid steel frame 8, side wall
Pilot tunnel curved support 5 and pilot tunnel horizontal brace 6；
Step 2: excavating the lower part pilot tunnel 2 of two sides, 16 part of rock shoulder of reserved stepped ramp type Core Soil 4 is reserved, under erection
Portion's grid steel frame 9；
Step 3: excavating the middle drift 3 on top, set up vault grid steel frame 10 and vault fashioned iron directly supports 11；
Step 4: laying prestressed anchor 12 in the point of intersection of side wall pilot tunnel curved support 5 and side wall grid steel frame 8；
Step 5: removing side wall pilot tunnel curved support 5, vault fashioned iron directly supports 11 and pilot tunnel horizontal brace 6；
Step 6: construction crown and two lining structure 14 of stalk；
Step 7: excavating reserved stepped ramp type Core Soil 4, two lining structure 15 of station inverted arch of constructing.
In addition, preferably, in one particular embodiment of the present invention, in step 2 further including in reserved stepped ramp type core
The rock shoulder 16 of soil 4 is with lower portion construction bolt-spary supports.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (9)
1. a kind of Core Soil bearing-type support system for tunneling subway station, which is characterized in that the support system includes
Positioned at the reserved stepped ramp type Core Soil left and right sides and symmetrically arranged side wall pilot tunnel curved support, pilot tunnel horizontal brace, side wall grid
Steelframe and lower grid steelframe and vault fashioned iron positioned at reserved stepped ramp type Core Soil top directly support and vault grid steel frame；
Rock shoulder, the rock shoulder and reserved step are symmetrically arranged with along tunnel excavation direction at left and right sides of the reserved stepped ramp type Core Soil
The corner on type Core Soil top is equipped with L-type angle steel backing plate along direction is excavated；
Side wall pilot tunnel curved support and pilot tunnel horizontal brace at left and right sides of the reserved stepped ramp type Core Soil intersect at L-type angle steel pad
Plate, and be fixedly connected respectively with the L-type angle steel backing plate；
Side wall pilot tunnel curved support, pilot tunnel horizontal brace and side wall grid steel frame point at left and right sides of the reserved stepped ramp type Core Soil
Do not surround one side wall pilot tunnel, the pilot tunnel horizontal brace and lower grid steelframe at left and right sides of the reserved stepped ramp type Core Soil respectively with
Reserved stepped ramp type Core Soil and bottom excavation face surround a lower part pilot tunnel, the upper surface of the reserved stepped ramp type Core Soil, vault
Grid steel frame and the side wall pilot tunnel curved support of the left and right sides surround a middle drift.
2. the Core Soil bearing-type support system according to claim 1 for tunneling subway station, which is characterized in that institute
It states vault fashioned iron and directly supports the upper surface middle part for being vertically positioned at reserved stepped ramp type Core Soil, and be arranged along tunnel excavation direction, it is described
The top that vault fashioned iron directly supports is fixedly connected with vault grid steel frame, and bottom end is abutted with the upper surface of reserved stepped ramp type Core Soil.
3. the Core Soil bearing-type support system according to claim 1 for tunneling subway station, which is characterized in that institute
It states vault grid steel frame to be fixedly connected with the side wall grid steel frame at left and right sides of it, the side wall grid steel frame point of the left and right sides
Be not fixedly connected with the lower grid steelframe of its underpart, the vault grid steel frame and its at left and right sides of side wall grid steel frame and
Lower grid steelframe collectively forms an arch overall structure.
4. the Core Soil bearing-type support system according to claim 1 for tunneling subway station, which is characterized in that institute
It states side wall grid steel frame, lower grid steelframe and vault grid steel frame and passes through lock foot anchoring stock and be fixedly connected with surrounding wall；
The lower part of the side wall pilot tunnel curved support is fixedly connected by lock foot anchoring stock with reserved stepped ramp type Core Soil.
5. the Core Soil bearing-type support system according to claim 1 for tunneling subway station, which is characterized in that institute
Stating support system further includes being set at left and right sides of the reserved stepped ramp type Core Soil and being located at rock shoulder with the shotcrete branch of lower portion
Shield.
6. the Core Soil bearing-type support system according to claim 1 for tunneling subway station, which is characterized in that institute
The point of intersection for stating side wall pilot tunnel curved support and side wall grid steel frame is laid with prestressed anchor.
7. the Core Soil bearing-type support system according to claim 1 for tunneling subway station, which is characterized in that institute
The upper surface for stating reserved stepped ramp type Core Soil and vault are at a distance of 3~5m.
8. a kind of construction of the Core Soil bearing-type support system as claimed in claim 1 for tunneling subway station
Method, which comprises the following steps:
Step 1: excavating the side wall pilot tunnel of top two sides, lay L-type angle steel backing plate, set up side wall grid steel frame, side wall pilot tunnel arc
Shape support and pilot tunnel horizontal brace；
Step 2: excavating the lower part pilot tunnel of two sides, reserve the rock shoulder portion of reserved stepped ramp type Core Soil, set up lower grid steel
Frame；
Step 3: excavating the middle drift on top, set up vault grid steel frame and directly supportted with vault fashioned iron；
Step 4: prestressed anchor is laid in the point of intersection of side wall pilot tunnel curved support and side wall grid steel frame,
Step 5: removing side wall pilot tunnel curved support, vault fashioned iron directly supports and pilot tunnel horizontal brace；
Step 6: construction crown and two lining structure of stalk；
Step 7: excavating reserved stepped ramp type Core Soil, two lining structure of station inverted arch of constructing.
9. the construction method of the Core Soil bearing-type support system according to claim 8 for tunneling subway station,
It is characterized in that, further includes the rock shoulder in reserved stepped ramp type Core Soil in step 2 with lower portion construction bolt-spary supports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163857.8A CN109854280B (en) | 2019-03-05 | 2019-03-05 | Core soil bearing type supporting system for underground excavation of subway station and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910163857.8A CN109854280B (en) | 2019-03-05 | 2019-03-05 | Core soil bearing type supporting system for underground excavation of subway station and construction method thereof |
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| Publication Number | Publication Date |
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| CN109854280A true CN109854280A (en) | 2019-06-07 |
| CN109854280B CN109854280B (en) | 2023-09-15 |
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| CN201910163857.8A Active CN109854280B (en) | 2019-03-05 | 2019-03-05 | Core soil bearing type supporting system for underground excavation of subway station and construction method thereof |
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Cited By (3)
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| CN113153317A (en) * | 2021-05-11 | 2021-07-23 | 北华航天工业学院 | Construction method and grouting device suitable for soft rock large-section tunnel |
| CN114718595A (en) * | 2022-03-18 | 2022-07-08 | 西南交通大学 | Arch cover method based ultra-large span tunnel excavation system and construction method thereof |
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| Publication number | Publication date |
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| CN109854280B (en) | 2023-09-15 |
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