CN210509196U - Large-section tunnel structure of hard rock stratum underground excavation single-layer lining subway parking line - Google Patents
Large-section tunnel structure of hard rock stratum underground excavation single-layer lining subway parking line Download PDFInfo
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- CN210509196U CN210509196U CN201920646645.0U CN201920646645U CN210509196U CN 210509196 U CN210509196 U CN 210509196U CN 201920646645 U CN201920646645 U CN 201920646645U CN 210509196 U CN210509196 U CN 210509196U
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Abstract
The utility model discloses a hard rock stratum undercut individual layer lining subway stop line large-section tunnel structure, which is arranged in a space formed by tunnel excavation, wherein a permanent tunnel supporting structure is provided with a spray anchor lining for an arch part and a side wall, and the bottom of the tunnel is provided with a waterproof concrete bottom plate; the connection part of the arch part and the side wall is provided with an arch foot longitudinal beam; a plurality of longitudinal drainage blind pipes, a plurality of transverse drainage blind pipes and longitudinal drainage blind ditches are arranged below the waterproof concrete bottom plate; two ends of the arc-shaped air duct plate are fixedly connected with the arch foot longitudinal beams, the upper part of the arc-shaped air duct plate is provided with a building block partition wall, and the lower part of the arc-shaped air duct plate is provided with an intermediate partition wall; longitudinal drainage side ditches are fixedly arranged on the inner sides of the joints of the side walls and the waterproof concrete bottom plates; an embedded water drain pipe is arranged in the arch foot longitudinal beam, and the embedded water drain pipe is embedded into the side wall and is connected into the longitudinal drainage side ditch. The utility model is suitable for a supporting construction in super large section tunnels such as hard rock stratum undercut subway station, parking line, but make full use of tunnel country rock bearing capacity simplifies supporting construction, improves the efficiency of construction.
Description
Technical Field
The utility model belongs to the technical field of tunnel and underground works, in particular to hard rock stratum undercut individual layer lining subway stop line large-section tunnel structure.
Background
In recent years, urban rail transit is developed vigorously in China, rail transit plans of 43 cities are repeated in China, the total planned mileage is about 8600 kilometers, the approved cities comprise not only four direct prefectures of Beijing, Shanghai, Tianjin and Chongqing, but also 5 planned single-row and most provincial cities, and meanwhile, three-line cities in the traditional sense of large population and economic scale also actively develop urban rail transit construction. Due to the difference of engineering geological conditions in various regions, the subway tunnel structure form and the construction method suitable for different stratum conditions can be developed according to local conditions, and the method has important significance for improving the engineering construction safety and economy and reducing the construction difficulty.
According to the related provisions of subway design specifications, a subway main line is provided with a stop line every 5-6 stations or 8-10 km, and the stop line has the functions of avoiding a fault train and temporarily returning the fault train. When the environmental conditions of ground buildings, traffic, pipelines and the like above the subway line do not allow open excavation, the underground excavation method is required to be implemented. The large-section tunnels such as Beijing, Shenzhen, Shenyang and the like of the underground excavation subway stop line built in China are built in the fourth-system stratum or the weak stratum, the construction methods such as a CRD method, a double-side-wall pilot tunnel and the like are mostly adopted, and the tunnel main body adopts a composite lining structural form; in addition, according to the ventilation and smoke exhaust requirements of the subway interval tunnel in the operation period, the stop line is separated from the interval main line through a reinforced concrete intermediate wall in general. For years, various problems occur in practical application, namely the connection problem of the intermediate wall and the secondary lining, the construction of the intermediate wall is difficult after the primary pouring of a tunnel secondary lining structure, the concrete pouring at the connection part of the intermediate wall and the secondary lining arch part is not compact, and the quality is not guaranteed; secondly, the crossover section that the stop line set up can't set up the mid-board because of the boundary limit reason, need set up the thrust fan and compensate to lack the partition wall and organize the influence to the flue gas air current. In Chongqing, Qingdao and other places, the stratum mainly comprises hard rocks, the strength of the rocks is high, underground water does not develop, the traditional structural form of constructing a large-section tunnel in the stratum of the fourth system is obviously not suitable, the excavated earth volume and the masonry amount are large, the construction process is complex, and the work efficiency is low. Therefore, the method is of great significance in developing a large-section tunnel structure form which can fully utilize the self-bearing capacity of the rock, ensure the safety of the engineering structure, improve the construction efficiency and save the engineering investment and is suitable for underground excavation of subway parking lines in the hard rock stratum by combining the characteristics of the hard rock stratum.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, a hard rock stratum undercut individual layer lining subway stop line large section tunnel structure is provided, be applicable to hard rock stratum undercut subway station, the supporting construction of super large section tunnels such as parking line, but make full use of tunnel country rock bearing capacity simplifies supporting construction, improves the efficiency of construction.
In order to solve the technical problem, the utility model discloses a technical scheme is: a large-section tunnel structure of a hard rock stratum underground excavation single-layer lining subway parking line is arranged in a space formed by tunnel excavation and comprises a tunnel permanent supporting structure and an arc-shaped air duct plate structure; the permanent tunnel supporting structure is characterized in that a spray anchor lining is arranged on an arch part (1) and a side wall (3), and a waterproof concrete bottom plate (11) is arranged at the bottom of the tunnel; an arch springing longitudinal beam (7) is arranged at the joint of the arch part (1) and the side wall (3), and the arch springing longitudinal beam (7) is located on the bedrock; a plurality of longitudinal drainage blind pipes (15), a plurality of transverse drainage blind pipes (14) and a longitudinal drainage blind ditch (16) are arranged below the waterproof concrete bottom plate (11), and the longitudinal drainage blind pipes (15) and the transverse drainage blind pipes (14) are connected into the longitudinal drainage blind ditch (16); two ends of the arc air duct plate (6) are fixedly connected with the arch foot longitudinal beams (7), the upper part of the arc air duct plate is provided with a building block partition wall (10) for partitioning the upper space, and the lower part of the arc air duct plate is provided with an intermediate partition wall (8) the top end of which is fixedly connected with the arc air duct plate; the inner sides of the joints of the side walls (3) and the waterproof concrete bottom plates (11) are respectively and fixedly provided with a longitudinal drainage side ditch (13); an embedded water drain pipe (12) is arranged in the arch foot longitudinal beam (7), and the embedded water drain pipe (12) is embedded into the side wall (3) and is connected into the longitudinal drainage side ditch (13).
Preferably, the arch part (1) is sprayed with double-layer concrete, the first layer is sprayed with concrete with the thickness of 150mm, the second layer is sprayed with concrete with the thickness of 100mm, and a waterproof spray film is arranged between the two layers of sprayed concrete.
Preferably, the side walls (3) are sprayed with a single layer of concrete 150mm thick.
Preferably, the arc-shaped air duct plate (6) is of a micro-arch structure made of reinforced concrete.
Preferably, a mortise (17) is arranged above the arch springing longitudinal beam (7) so as to collect water leakage of the arch part structure and reserve conditions for later reinforcing of the second lining. The bottom end of the arch part (1) is provided with a reserved long-term molding secondary lining space (5).
Preferably, the diameter of the embedded drain pipes (12) is 50mm, and the distance between the embedded drain pipes along the longitudinal direction of the tunnel is 10 m.
Preferably, the transverse drainage blind pipes (14) and the longitudinal drainage blind pipes (15) are connected in a cross manner and are embedded in the concrete cushion layer below the bottom plate; 4 longitudinal drainage blind pipes (15) with the diameter of 100mm are arranged along the longitudinal direction of the tunnel, and one transverse drainage blind pipe (14) with the diameter of 75mm is arranged at every 10m in the transverse direction. The leaked water finally converges into the longitudinal drainage blind ditch (16) through the transverse drainage blind pipe (14).
Preferably, the arch anchor rods (2) arranged on the arch part (1) are rock anchor rods which are synchronously applied with the sprayed concrete on the first layer of the arch part (1) and radially arranged along the peripheral outline of the arch part of the tunnel at a certain interval, and the side wall local anchor rods (4) arranged on the side wall (3) are 2 rows of anchor rods which are simultaneously applied with the sprayed concrete on the side wall (3) and are arranged along the lower part of the arch springing longitudinal beam (7).
Compared with the prior art, the utility model discloses the beneficial effect who has is:
1. the utility model discloses a hard rock stratum undercut individual layer lining subway stop line large section tunnel structure, but make full use of hard rock stratum rock strength is high, characteristics such as groundwater is undeveloped, adopts the jet anchor lining cutting as tunnel supporting construction, make full use of the country rock from bearing capacity, structural style is simple, construction speed is fast, satisfies subway tunnel security, stability, durability requirement, can be used to hard rock stratum undercut parking line super large section and other underground space of strides greatly.
2. The design of the arc-shaped air duct plate is adopted, and smoke is discharged from the tunnel through the air duct, so that the masonry amount of the intermediate wall is reduced and the construction difficulty is reduced; the arc air duct plate is more reasonable in stress than a flat plate, does not need to be provided with supporting systems such as beam columns and the like, and is more suitable for a large-span space; the formwork can be constructed by adopting a sizing formwork trolley, the formwork removal speed is high, and the construction is efficient.
3. The arch springing sets up the reinforced concrete longeron, and the longeron supports on hard country rock, can regard as wind channel board side direction and vertical support with stable structure, also can do the reinforcement mould for long-term arch portion and build two lining reservation conditions.
4. The utility model provides a combined application and innovation of a large section of a subway stop line for underground excavation construction in a hard rock stratum and a supporting structure, waterproof and drainage treatment, an internal structure and the like of other large-span tunnels, which fully utilizes the characteristics of high bearing capacity and good self-stability of the hard rock stratum and solves the problems of complex structure and difficult arrangement of a cross section air duct plate of the large-span tunnel of the subway stop line; compared with the traditional composite lining structure, the underground ultra-large space underground excavation structure has the advantages of simpler construction step sequence, convenient construction organization, lower manufacturing cost and the like, and the application space of the underground ultra-large space underground excavation structure and the construction technology is well expanded.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the middle arch springing longitudinal beam of the present invention.
In the figure, 1-arch part, 2-arch part anchor rod, 3-side wall, 4-side wall local anchor rod, 5-reserved long-term molding secondary lining space, 6-arc air duct plate, 7-arch foot longitudinal beam, 8-intermediate wall, 9-intermediate wall foundation, 10-building block partition wall, 11-waterproof concrete bottom plate, 12-embedded water drain pipe, 13-longitudinal drainage side ditch, 14-transverse drainage blind pipe, 15-longitudinal drainage blind pipe, 16-longitudinal drainage blind ditch and 17-tongue-and-groove.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model discloses a hard rock stratum undercut single-layer lining subway stop line large-section tunnel structure, as shown in the figure, is arranged in the space formed by tunnel excavation, and comprises a tunnel permanent supporting structure and an arc-shaped air duct plate structure; the permanent tunnel supporting structure is characterized in that a spray anchor lining is arranged on an arch part (1) and a side wall (3), and a waterproof concrete bottom plate (11) is arranged at the bottom of a tunnel; an arch springing longitudinal beam (7) is arranged at the joint of the arch part (1) and the side wall (3), and the arch springing longitudinal beam (7) is located on the bedrock; a plurality of longitudinal drainage blind pipes (15), a plurality of transverse drainage blind pipes (14) and a longitudinal drainage blind ditch (16) are arranged below the waterproof concrete bottom plate (11), and the longitudinal drainage blind pipes (15) and the transverse drainage blind pipes (14) are connected into the longitudinal drainage blind ditch (16); two ends of the arc air duct plate (6) are fixedly connected with the arch foot longitudinal beams (7), the upper part is provided with a building block partition wall (10) for separating the upper space, and the lower part is provided with an intermediate partition wall (8) the top end of which is fixedly connected with the arc air duct plate; the inner sides of the joints of the side walls (3) and the waterproof concrete bottom plates (11) are respectively and fixedly provided with a longitudinal drainage side ditch (13); an embedded water drain pipe (12) is arranged in the arch foot longitudinal beam (7), and the embedded water drain pipe (12) is embedded into the side wall (3) and is connected into the longitudinal drainage side ditch (13).
In the embodiment, the arch part (1) is sprayed with double-layer concrete, the first layer is sprayed with concrete with the thickness of 150mm, the second layer is sprayed with concrete with the thickness of 100mm, and a waterproof spray film is arranged between the two layers of sprayed concrete.
In this example, the side wall (3) was sprayed with a single layer of concrete 150mm thick.
In the embodiment, the arc-shaped air duct plate (6) is a micro-arch structure of reinforced concrete.
In the embodiment, a tongue-and-groove (17) is arranged above the arch springing longitudinal beam (7) so as to collect water leakage of the arch part structure and reserve conditions for reinforcing the second lining in the later period. The bottom end of the arch part (1) is provided with a reserved long-term molding secondary lining space (5).
In the embodiment, the diameter of the pre-buried drain pipes (12) is 50mm, and the longitudinal distance along the tunnel is 10 m.
In the embodiment, the transverse drainage blind pipe (14) and the longitudinal drainage blind pipe (15) are connected in a cross manner and are embedded in the concrete cushion layer below the bottom plate; 4 longitudinal drainage blind pipes (15) with the diameter of 100mm are arranged along the longitudinal direction of the tunnel, and one transverse drainage blind pipe (14) with the diameter of 75mm is arranged at every 10m in the transverse direction. The leaked water finally converges into the longitudinal drainage blind ditch (16) through the transverse drainage blind pipe (14).
In the embodiment, the arch anchor rods (2) arranged on the arch part (1) are rock anchor rods which are synchronously applied with the first layer of sprayed concrete of the arch part (1) and radially arranged along the peripheral outline of the tunnel arch part at a certain interval, and the side wall local anchor rods (4) arranged on the side wall (3) are 2 rows of anchor rods which are simultaneously applied with the sprayed concrete of the side wall (3) and are arranged along the lower part of the arch springing longitudinal beam (7).
The present invention has been described in detail with reference to the embodiments, but the description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention. The protection scope of the present invention is defined by the claims. Technical scheme, or technical personnel in the field are in the utility model technical scheme's inspiration the utility model discloses an essence and protection within range, design similar technical scheme and reach above-mentioned technological effect, perhaps to the impartial change that application scope was made and improve etc. all should still belong to within the protection scope is covered to the patent of the utility model. It should be noted that for the sake of clarity, parts of the description of the invention have been omitted which do not have a direct obvious relationship with the scope of protection of the invention, but which are known to the skilled person.
Claims (8)
1. A large-section tunnel structure of a hard rock stratum underground excavation single-layer lining subway parking line is characterized by being arranged in a space formed by tunnel excavation and comprising a tunnel permanent supporting structure and an arc-shaped air duct plate structure; the permanent tunnel supporting structure is characterized in that a spray anchor lining is arranged on an arch part (1) and a side wall (3), and a waterproof concrete bottom plate (11) is arranged at the bottom of the tunnel; an arch springing longitudinal beam (7) is arranged at the joint of the arch part (1) and the side wall (3), and the arch springing longitudinal beam (7) is located on the bedrock; a plurality of longitudinal drainage blind pipes (15), a plurality of transverse drainage blind pipes (14) and a longitudinal drainage blind ditch (16) are arranged below the waterproof concrete bottom plate (11), and the longitudinal drainage blind pipes (15) and the transverse drainage blind pipes (14) are connected into the longitudinal drainage blind ditch (16); two ends of the arc air duct plate (6) are fixedly connected with the arch foot longitudinal beams (7), the upper part of the arc air duct plate is provided with a building block partition wall (10) for partitioning the upper space, and the lower part of the arc air duct plate is provided with an intermediate partition wall (8) the top end of which is fixedly connected with the arc air duct plate; the inner sides of the joints of the side walls (3) and the waterproof concrete bottom plates (11) are respectively and fixedly provided with a longitudinal drainage side ditch (13); an embedded water drain pipe (12) is arranged in the arch foot longitudinal beam (7), and the embedded water drain pipe (12) is embedded into the side wall (3) and is connected into the longitudinal drainage side ditch (13).
2. A hard rock formation undercut single-layer-lining subway stop line large-section tunnel structure as claimed in claim 1, characterized in that said arch portion (1) is sprayed with double-layer concrete, the first layer is sprayed with 150mm thick concrete, the second layer is sprayed with 100mm thick concrete, and a waterproof spray film is provided between the two layers of sprayed concrete.
3. A hard rock formation undercut single-layer lining subway stop line large-section tunnel structure as claimed in claim 1, characterized in that said side walls (3) are sprayed with single-layer concrete 150mm thick.
4. A hard rock formation underground excavation single-layer lining subway stop line large-section tunnel structure as claimed in claim 1, characterized in that said arc-shaped air duct plate (6) is a micro-arch structure of reinforced concrete.
5. A hard rock formation underground excavation single-layer lining subway stop line large-section tunnel structure as claimed in claim 1, characterized in that a tongue-and-groove (17) is provided above said arch foot longitudinal beam (7).
6. The hard rock stratum undercut single-layer-lining subway stop line large-section tunnel structure is characterized in that the diameter of each embedded water drain pipe (12) is 50mm, and the distance between every two embedded water drain pipes along the longitudinal direction of the tunnel is 10 m.
7. The hard rock stratum undercut single-layer-lining subway stop line large-section tunnel structure is characterized in that the transverse drainage blind pipes (14) and the longitudinal drainage blind pipes (15) are connected in a cross mode and are buried in a concrete cushion layer below a bottom plate; 4 longitudinal drainage blind pipes (15) with the diameter of 100mm are arranged along the longitudinal direction of the tunnel, and one transverse drainage blind pipe (14) with the diameter of 75mm is arranged at every 10m in the transverse direction.
8. A hard rock formation underground excavation single-layer lining subway stop line large-section tunnel structure as claimed in claim 1, characterized in that the arch part anchor rods (2) arranged on the arch part (1) are rock anchor rods, and the side wall local anchor rods (4) arranged on the side wall (3) are 2 rows of anchor rods arranged along the lower part of the arch foot longitudinal beams (7) and simultaneously applied with the concrete sprayed on the side wall (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920646645.0U CN210509196U (en) | 2019-05-08 | 2019-05-08 | Large-section tunnel structure of hard rock stratum underground excavation single-layer lining subway parking line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920646645.0U CN210509196U (en) | 2019-05-08 | 2019-05-08 | Large-section tunnel structure of hard rock stratum underground excavation single-layer lining subway parking line |
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| CN210509196U true CN210509196U (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030016A (en) * | 2019-05-08 | 2019-07-19 | 中铁第六勘察设计院集团有限公司 | A kind of ground consisting of hard rock tunneling single shell lining Subway Stop line large cross-section tunnel structure |
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2019
- 2019-05-08 CN CN201920646645.0U patent/CN210509196U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030016A (en) * | 2019-05-08 | 2019-07-19 | 中铁第六勘察设计院集团有限公司 | A kind of ground consisting of hard rock tunneling single shell lining Subway Stop line large cross-section tunnel structure |
| CN110030016B (en) * | 2019-05-08 | 2024-02-09 | 中铁第六勘察设计院集团有限公司 | Large-section tunnel structure of hard rock stratum underground excavation single-layer lining subway parking line |
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