CN112049649A - Subway station with existing tunnel striding upwards and construction method thereof - Google Patents
Subway station with existing tunnel striding upwards and construction method thereof Download PDFInfo
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- CN112049649A CN112049649A CN202010926802.0A CN202010926802A CN112049649A CN 112049649 A CN112049649 A CN 112049649A CN 202010926802 A CN202010926802 A CN 202010926802A CN 112049649 A CN112049649 A CN 112049649A
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- 238000010276 construction Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000009412 basement excavation Methods 0.000 abstract description 10
- 238000005457 optimization Methods 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 5
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of rail transit, and provides a subway station spanning an existing tunnel. The construction method of the subway station spanning the existing tunnel comprises the following steps: s1, constructing a bearing body above the existing tunnel, and enabling the existing tunnel to pass through a through channel of the bearing body; s2, constructing a newly built tunnel above the supporting platform of the bearing body; and S3, after the construction of the newly-built tunnel is finished, constructing a station hall layer above the newly-built tunnel. According to the invention, the station platform layer and the station hall layer are constructed on the bearing body, wherein the station hall layer and the station platform layer are constructed by a subsurface excavation method, the station hall layer ensures evacuation and communication of passengers, and the station platform layer ensures normal operation of a train, so that engineering risks are greatly reduced.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a subway station striding over an existing tunnel and a construction method thereof.
Background
Along with the construction of cities, rail transit is developing vigorously, subway lines are increasing continuously, and in the follow-up process, subway engineering cross nodes are not reserved for long-term subway structure construction conditions, such as subway stations needing to be built above existing subway tunnels. The construction of the traditional subway station needs to excavate a deep and large foundation pit, the construction of the subway station by excavating the deep and large foundation pit above the existing tunnel has extremely high risk, engineering accidents are easy to cause, and meanwhile, a better solution is not provided for the cross node engineering of the type at present.
Disclosure of Invention
The invention aims to provide a subway station striding over an existing tunnel and a construction method thereof, which can at least solve part of defects in the prior art.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: the subway station with the upper cross of the existing tunnel comprises a bearing body, wherein the bearing body is provided with a supporting platform and a through channel for the existing tunnel to pass through, and a station platform layer and a station hall layer are sequentially constructed above the supporting platform.
Further, the station layer comprises a newly-built tunnel crossed with the existing tunnel.
Further, the supporting body is a door type reinforcing body, the door type reinforcing body is provided with a door arch, the through channel is the door arch, and the supporting platform is the upper surface of the door type reinforcing body.
Further, the number of the door arches is the same as the number of the existing tunnels.
Further, the door arches are multiple and are uniformly distributed at intervals along the extending direction which is horizontally vertical to the existing track.
The embodiment of the invention provides another technical scheme: a construction method of a subway station striding over an existing tunnel comprises the following steps:
s1, constructing a bearing body above the existing tunnel, and enabling the existing tunnel to pass through a through channel of the bearing body;
s2, constructing a newly built tunnel above the supporting platform of the bearing body;
and S3, after the construction of the newly-built tunnel is finished, constructing a station hall layer above the newly-built tunnel.
Furthermore, an MJS construction method is adopted when the bearing body is constructed.
Further, when the new tunnel is constructed, a shield method or a pipe jacking construction method is adopted.
Furthermore, when the new tunnel is constructed, a ballast body is placed in the new tunnel to prevent the existing tunnel and the new tunnel from floating upwards in an overrun mode, and the ballast body is recovered after the construction of the station hall layer is completed.
And further, adopting a skip method to excavate foundation pits of the station hall layer in sections or adopting a pipe jacking method to construct the station hall layer.
Compared with the prior art, the invention has the beneficial effects that: through construction station platform layer and station room layer on the supporting body, wherein station room layer and station platform layer are under construction through the undercut method, and station room layer guarantees evacuation and the intercommunication of passenger, and station platform layer guarantees the normal operating of train, greatly reduced engineering risk.
Drawings
Fig. 1 is a plan layout view of a subway station spanning an existing tunnel according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a sectional view taken along line B-B of FIG. 1;
in the reference symbols: 1-door type reinforcement; 2-a platform layer; 20-newly building a tunnel; 3-station hall layer; 30-station hall floor aisle; 4-a building envelope; 5-existing tunnel; 6-water bag.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, an embodiment of the present invention provides a subway station spanning an existing tunnel, including a supporting body, where the supporting body has a supporting platform and a through channel for the existing tunnel to pass through, and a platform layer and a hall layer are sequentially formed above the supporting platform. In this embodiment, the supporting body is constructed above the existing tunnel, and the supporting body can support the station platform layer and the station hall layer, and the supporting body is constructed firstly, and then the station platform layer and the station hall layer are constructed in sequence, so that a series of problems caused by direct excavation of a deep foundation pit can be avoided. Specifically, the supporting body is provided with a through channel, an existing tunnel can pass through the supporting body, the existing tunnel cannot be obstructed, a supporting platform is arranged above the supporting body after the supporting body is stably arranged, during construction, two sides of the existing tunnel are constructed firstly, and then a station platform layer and a station hall layer are constructed upwards on the supporting platform step by step according to the construction sequence. Preferably, during construction, the station layer needs to meet the originating and receiving conditions of a shield or a push pipe, and the station layer meets the originating and receiving conditions of the push pipe of the station hall layer.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 to fig. 3, where the station layer includes a newly-built tunnel that is arranged to intersect with the existing tunnel. In this embodiment, the newly-built tunnel is in a platform layer, and is used for train passage of a newly-built subway station, and a shield or pipe jacking construction method can be adopted. The newly-built tunnel and the existing tunnel are arranged in a crossed mode, namely the direction of the subway running in the newly-built tunnel is different from the direction of the subway running in the existing tunnel.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 to 3, the station hall layer is provided with an enclosure structure. In this embodiment, establish envelope can make subway station more stable firm.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 to fig. 3, where the station hall floor has a station hall floor channel whose length direction is consistent with the extending direction of the newly-built tunnel. Preferably, the station hall layer channel is communicated with subway stations on two sides of the existing tunnel. In this embodiment, a station hall floor channel is newly built, and the channel is constructed by adopting a pipe jacking method and is used for communicating and evacuating passengers at subway stations on two sides of an existing tunnel. When a passageway of a station hall layer is constructed, a ballast body, such as a ballast water bag, can be properly loaded in the newly-built tunnel, so that floating overrun of the existing tunnel and the newly-built tunnel is avoided.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1 to 3, in which the supporting body is a door-type reinforcing body, the door-type reinforcing body has a door arch, the through channel is the door arch, and the supporting platform is an upper surface of the door-type reinforcing body. In this embodiment, the supporting body is a portal reinforcement, and an MJS construction method with small disturbance to the soil body is adopted when the portal reinforcement is constructed. Preferably, the number of the door arches is the same as the number of the existing tunnels. The door arches are arranged at intervals along the extending direction which is horizontally vertical to the existing track. In this embodiment, the number of the gate arches may be set according to the number of the existing tunnels, for example, as shown in the figure, two gate arches may be set for two existing tunnels, and the two gate arches are spaced according to the interval between the two existing tunnels.
The embodiment of the invention provides a construction method of a subway station striding over an existing tunnel, which comprises the following steps: s1, constructing a bearing body above the existing tunnel, and enabling the existing tunnel to pass through a through channel of the bearing body; s2, constructing a newly built tunnel above the supporting platform of the bearing body; and S3, after the construction of the newly-built tunnel is finished, constructing a station hall layer above the newly-built tunnel. In this embodiment, the supporting body is constructed above the existing tunnel, and the supporting body can support the station platform layer and the station hall layer, and the supporting body is constructed firstly, and then the station platform layer and the station hall layer are constructed in sequence, so that a series of problems caused by direct excavation of a deep foundation pit can be avoided. Specifically, the supporting body is provided with a through channel, an existing tunnel can pass through the supporting body, the existing tunnel cannot be obstructed, a supporting platform is arranged above the supporting body after the supporting body is stably arranged, during construction, two sides of the existing tunnel are constructed firstly, and then a station platform layer and a station hall layer are constructed upwards on the supporting platform step by step according to the construction sequence. Preferably, during construction, the station layer needs to meet the originating and receiving conditions of a shield or a push pipe, and the station layer meets the originating and receiving conditions of the push pipe of the station hall layer.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 to 3, wherein an MJS construction method is adopted when the carrier is constructed. In this embodiment, the supporting body is a portal reinforcement, and an MJS construction method with small disturbance to the soil body is adopted when the portal reinforcement is constructed. Preferably, the number of the door arches is the same as the number of the existing tunnels. The door arches are arranged at intervals along the extending direction which is horizontally vertical to the existing track. In this embodiment, the number of the gate arches may be set according to the number of the existing tunnels, for example, as shown in the figure, two gate arches may be set for two existing tunnels, and the two gate arches are spaced according to the interval between the two existing tunnels.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1 to fig. 3, when constructing the newly-built tunnel, a shield method or a pipe-jacking construction method is adopted. In this embodiment, the newly-built tunnel is in a platform layer, and is used for train passage of a newly-built subway station, and a shield or pipe jacking construction method can be adopted. The newly-built tunnel and the existing tunnel are arranged in a crossed mode, namely the direction of the subway running in the newly-built tunnel is different from the direction of the subway running in the existing tunnel.
Referring to fig. 1 to 3 as an optimization scheme of an embodiment of the present invention, when the new tunnel is constructed, a ballast body is placed in the new tunnel to prevent the existing tunnel and the new tunnel from floating upwards beyond a limit, and the ballast body is recovered after the construction of the station hall layer is completed.
As an optimization scheme of the embodiment of the invention, please refer to fig. 1 to 3, a station hall layer foundation pit is excavated in sections by adopting a skip method or a station hall layer is constructed by adopting a pipe jacking method. In this embodiment, a skip method is adopted to excavate the station hall layer foundation pit in sections, and the length and the number of the sections can be determined according to actual conditions. The excavation may be performed in the form of, for example, six pit divisions in the lobby floor as shown in fig. 3, which are defined as excavation 1, excavation 2, excavation 3, excavation 4, excavation 5, and excavation 6.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a cross subway station in existing tunnel on it which characterized in that: the tunnel type tunnel construction platform comprises a supporting body, wherein the supporting body is provided with a supporting platform and a through channel for the existing tunnel to pass through, and a platform layer and a station hall layer are sequentially constructed above the supporting platform.
2. A subway station as claimed in claim 1, spanning an existing tunnel, wherein: the station layer comprises a newly-built tunnel which is crossed with the existing tunnel.
3. A subway station as claimed in claim 1, spanning an existing tunnel, wherein: the supporting body is a door type reinforcing body, the door type reinforcing body is provided with a door arch, the through channel is the door arch, and the supporting platform is the upper surface of the door type reinforcing body.
4. A subway station spanning an existing tunnel as claimed in claim 3, wherein: the number of the door arches is the same as that of the existing tunnel.
5. A subway station spanning an existing tunnel as claimed in claim 3, wherein: the door arches are arranged at intervals along the extending direction which is horizontally vertical to the existing track.
6. A construction method of a subway station striding over an existing tunnel is characterized by comprising the following steps:
s1, constructing a bearing body above the existing tunnel, and enabling the existing tunnel to pass through a through channel of the bearing body;
s2, constructing a newly built tunnel above the supporting platform of the bearing body;
and S3, after the construction of the newly-built tunnel is finished, constructing a station hall layer above the newly-built tunnel.
7. The construction method of a subway station spanning an existing tunnel according to claim 6, wherein: and an MJS construction method is adopted when the bearing body is constructed.
8. The construction method of a subway station spanning an existing tunnel according to claim 6, wherein: and when the newly-built tunnel is constructed, a shield method or a pipe jacking construction method is adopted.
9. The construction method of a subway station spanning an existing tunnel according to claim 6, wherein: when the new tunnel is constructed, a ballast body is placed in the new tunnel, the existing tunnel and the new tunnel are prevented from floating upwards in an overrun mode, and the ballast body is recovered after the construction of the station hall layer is completed.
10. The construction method of a subway station spanning an existing tunnel according to claim 6, wherein: and excavating foundation pits of the station hall layer in sections by adopting a skip method or constructing the station hall layer by adopting a pipe jacking method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010926802.0A CN112049649A (en) | 2020-09-07 | 2020-09-07 | Subway station with existing tunnel striding upwards and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010926802.0A CN112049649A (en) | 2020-09-07 | 2020-09-07 | Subway station with existing tunnel striding upwards and construction method thereof |
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| Publication Number | Publication Date |
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| CN112049649A true CN112049649A (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010926802.0A Pending CN112049649A (en) | 2020-09-07 | 2020-09-07 | Subway station with existing tunnel striding upwards and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006814A (en) * | 2021-04-28 | 2021-06-22 | 西南交通大学 | Pressure reducing structure and construction method for newly-built tunnel to span existing traffic tunnel |
| CN113565525A (en) * | 2021-08-28 | 2021-10-29 | 中铁上海工程局集团有限公司 | Construction protection system and construction method for newly-built shield tunnel super-close ultra-shallow buried upper-span existing tunnel |
-
2020
- 2020-09-07 CN CN202010926802.0A patent/CN112049649A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113006814A (en) * | 2021-04-28 | 2021-06-22 | 西南交通大学 | Pressure reducing structure and construction method for newly-built tunnel to span existing traffic tunnel |
| CN113006814B (en) * | 2021-04-28 | 2021-10-15 | 西南交通大学 | Pressure reducing structure and construction method for newly-built tunnel to span existing traffic tunnel |
| CN113565525A (en) * | 2021-08-28 | 2021-10-29 | 中铁上海工程局集团有限公司 | Construction protection system and construction method for newly-built shield tunnel super-close ultra-shallow buried upper-span existing tunnel |
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