Portal structure of interface of mining method tunnel and subway station

Abstract

The utility model provides a tunnel portal structure of a mining method tunnel and subway station interface, which comprises a station end wall and a tunnel lining structure, a tunnel secondary lining of the tunnel lining structure comprises a vault positioned at the upper part, two haunches respectively connected to two ends of the vault and inverted arches connected to the bottoms of the two haunches, steel bar connectors are embedded in the interfaces of the station end wall and the vault and the inverted arch in the length direction of the tunnel secondary lining, and steel bars embedded in the vault and the inverted arch are connected with the steel bar connectors embedded in the station end wall. A plurality of embedded steel bars are embedded in the station end wall in the radial direction of the side wall of the tunnel portal, one ends of the embedded steel bars are deeply embedded in the inner wall of the tunnel portal of the station end wall, and the other ends of the embedded steel bars are connected with a tunnel second lining. The two haunches of the tunnel secondary lining extend into a tunnel portal connector of the station end wall and are attached to the side wall of a tunnel portal, and the two haunches of the tunnel secondary lining are connected to the side wall of the tunnel portal of the station end wall through embedded steel bars. Compared with the prior art, the steel bar connector is higher in connection rigidity and higher in perfectness ratio.

Description

Technical Field

[0001] The utility model relates to the technical field of subway civil construction, in particular to a tunnel door structure at the interface of a mining tunnel and a subway station. Background Art

[0002] In urban subway construction, the interface between the open-cut station and the dark-cut tunnel is usually connected by flat connection. In the prior art, a steel bar connector is embedded at the intersection of the end wall of the station main structure and the secondary lining of the dark-cut tunnel (the cross-sectional range of the secondary lining structure); when the dark-cut tunnel is excavated and the secondary lining is constructed, the steel bars of the secondary lining are connected to the steel bar connector embedded in the end wall of the station main structure, thereby realizing the interface connection between the dark-cut tunnel and the open-cut station.

[0003] The existing technology has several disadvantages: First, the construction efficiency of the full-section embedded steel bar connector and the secondary lining is low and the integrity rate of the connector cannot be guaranteed, resulting in a decrease in the connection quality between the dark-cut tunnel and the open-cut station. Second, the flat connection method is adopted, and the connection rigidity between the dark-cut tunnel and the open-cut station is weak, which is not conducive to the control of the differential settlement between the open-cut station and the tunnel interface.

[0004] In view of this, it is indeed necessary to provide a portal structure for the interface between a mining tunnel and a subway station that can solve the above-mentioned problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a portal structure for the interface between a mining tunnel and a subway station, which is used to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a portal structure at the interface of a mining tunnel and a subway station, comprising a station end wall and a tunnel lining structure connected at the portal interface of the station end wall, the tunnel secondary lining of the tunnel lining structure comprising an arch located above, two waists respectively connected to the two ends of the arch and an invert connected to the bottom of the two waists, the station end wall is respectively pre-embedded with steel bar connectors along the length direction of the tunnel secondary lining at the interface with the arch and the invert, the pre-embedded steel bars of the arch and the invert are connected with the pre-embedded steel bar connectors of the station end wall; the station end wall is radially pre-embedded with a plurality of embedded steel bars along the side wall of the portal, one end of the embedded steel bar is deeply buried in the inner wall of the portal of the station end wall, and the other end is connected to the tunnel secondary lining; the two waists of the tunnel secondary lining extend into the portal interface of the station end wall and fit to the side wall of the portal, and the two waists of the tunnel secondary lining are connected to the side wall of the portal of the station end wall through the embedded steel bars.

[0007] Through the above technical scheme, the arch and the invert of the portal structure of the utility model are partially connected to the station end wall by steel bar connectors, while the arch waist is connected to the station end wall by "embedded". The connection rigidity of this combined structure is stronger and the integrity rate of the steel bar connector is higher, which overcomes the problems in the prior art that the integrity rate of the full-section embedded steel bar connector cannot be guaranteed and the full flat connection rigidity is poor.

[0008] Furthermore, an inner row of steel bar connectors close to the inner side of the tunnel secondary lining and an outer row of steel bar connectors away from the inner side of the tunnel secondary lining are pre-buried at the interface between the station end wall and the invert arch. The inner row of steel bar connectors are parallel to the outer row of steel bar connectors, and each of the inner row of steel bar connectors and the outer row of steel bar connectors is vertically arranged on the station end wall.

[0009] Furthermore, it also includes a plurality of reinforcing steel bars, the arrangement length of the outer row of steel bar connectors is greater than the arrangement length of the inner row of steel bar connectors, and the arc-shaped arrangement of the outer row of steel bar connectors extends to the triangular area between the arch waist and the invert arch; the reinforcing steel bars are located in the triangular area, one end of the reinforcing steel bars is connected to the inside of the tunnel secondary lining, and the other end is connected to the bottom of the station end wall.

[0010] Furthermore, a top row of steel bar connectors close to the top of the tunnel secondary lining and a bottom row of steel bar connectors away from the top of the tunnel secondary lining are arranged at the interface between the station end wall and the arch. The top row of steel bar connectors and the bottom row of steel bar connectors are parallel to each other and arranged horizontally.

[0011] Furthermore, the tunnel lining structure includes a tunnel primary support which is sleeved outside the tunnel secondary lining. The tunnel secondary lining and the tunnel primary support are longitudinally arranged side by side and closely attached to the underground continuous wall located at the interface between the station end wall and the tunnel lining structure.

[0012] Furthermore, the arch connection end where the tunnel secondary lining is connected to the station end wall is in a Z-shaped structure, the end of the underground continuous wall is located in the groove between the arch connection end and the station end wall, and the two sides of the underground continuous wall are respectively connected to the end of the tunnel primary support and the side of the station end wall.

[0013] Furthermore, a station floor is provided at the bottom of the station end wall, and the outer side of the primary tunnel support close to the invert is connected to the upper end face of the underground continuous wall; the invert connection end of the tunnel secondary lining, the end of the primary tunnel support and the side of the underground continuous wall are respectively closely attached to the ends of the station floor.

[0014] Furthermore, the length of the embedded steel bar is 1000+t mm, the length of the embedded steel bar anchored in the station end wall is 1000 mm, and the length of the embedded steel bar anchored in the tunnel lining structure is t-40 mm, where t is the thickness of the secondary lining of the tunnel.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] 1. The arch and invert of the portal structure of the utility model are partially connected to the station end wall by steel bar connectors, while the arch waist is connected to the station end wall by "embedded". The connection rigidity of this combined structure is stronger and the intactness rate of the steel bar connector is higher, which overcomes the problems in the prior art that the intactness rate of the full-section embedded steel bar connector cannot be guaranteed and the full flat connection rigidity is poor.

[0017] 2. Based on the arch waist being connected to the station end wall by "embedded" and the arch and invert being partially connected by steel connectors, the arch and invert of the portal structure of the utility model are also connected to the station end wall by "flush connection". This combined structure further improves the connection stiffness and further improves the integrity rate of the steel connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The schematic diagram of the structure of the portal structure at the interface of the mining tunnel and the subway station of the utility model.

[0020] Figure 2 for Figure 1 Schematic diagram of the reinforcement structure of the station end wall at the top of section A.

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the station end wall reinforcement at the bottom of section B.

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the station end wall reinforcement at the arch waist of the middle C section.

[0023] Figure numerals: 105, primary support of tunnel; 106, secondary lining of tunnel; 107, top row steel bar connector; 108, bottom row steel bar connector; 109, inner row steel bar connector; 110, outer row steel bar connector; 111, embedded steel bars; 201, station end wall; 202, station side wall; 203, station floor; 204, station middle plate; 205, end wall opening edge line; 206, shield ring frame beam; 207, underground continuous wall; 208, reinforcing steel bars. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] like Figure 1 As shown, the portal structure of the interface between the mining method tunnel and the subway station of the utility model includes a station end wall 201 and a tunnel lining structure connected to the portal interface of the station end wall 201.

[0027] The tunnel lining structure includes a tunnel secondary lining 106 and a tunnel primary support 105 sleeved on the outside of the tunnel secondary lining 106. The tunnel secondary lining 106 is composed of an arch, two haunches and an invert. Specifically, the two ends of the arch are fixedly connected to the tops of the two haunches, and the two ends of the invert are fixedly connected to the bottoms of the two haunches. The station end wall 201 is pre-embedded with steel bar connectors at the interface with the arch and the invert along the length direction of the tunnel secondary lining 106, and the steel bars pre-embedded in the arch and the invert are connected to the steel bar connectors at corresponding positions. The station end wall 201 is pre-embedded with a plurality of embedded steel bars 111 radially along the side wall of the tunnel portal. One end of the embedded steel bar 111 is deeply buried in the inner wall of the tunnel portal of the station end wall 201, and the other end is connected to the tunnel secondary lining 106. The two arch waists of the tunnel secondary lining 106 extend into the portal interface of the station end wall and fit to the portal side wall. The two arch waists of the tunnel secondary lining 106 are anchored and connected to the portal side wall of the station end wall 201 through embedded steel bars 111.

[0028] Compared with the prior art, the arch and the invert arch of the portal structure of the utility model are partially connected to the station end wall 201 in the length direction of the tunnel by using steel connectors, while the arch waist is connected to the station end wall 201 by "embedded". The connection rigidity of this combined structure is stronger and the integrity rate of the steel connector is higher, which overcomes the problems in the prior art that the integrity rate of the full-section embedded steel connector cannot be guaranteed and the full flat connection rigidity is poor.

[0029] It should be explained that the above-mentioned vault, haunch and invert can be formed into a ring as a whole, or can be formed into a ring by splicing pipe segments.

[0030] Furthermore, the portal structure of the utility model also includes a plurality of reinforcing steel bars 208. An inner row of steel bar connectors 109 close to the inner side of the tunnel secondary lining 106 and an outer row of steel bar connectors 110 far from the inner side of the tunnel secondary lining 106 are pre-buried at the interface between the station end wall 201 and the inverted arch. The inner row of steel bar connectors 109 are parallel to the outer row of steel bar connectors 110, and each of the inner row of steel bar connectors 109 and the outer row of steel bar connectors 110 is vertically arranged on the station end wall 201. The arrangement length of the outer row of steel bar connectors 110 is greater than the arrangement length of the inner row of steel bar connectors 109, and the arc arrangement of the outer row of steel bar connectors 110 extends to the triangular area between the arch waist and the inverted arch. The reinforcing steel bar 208 is located in the triangular area, and one end of the reinforcing steel bar 208 is connected to the inside of the tunnel secondary lining 106, and the other end is connected to the bottom of the station end wall 201.

[0031] According to the above technical solution, since the overall outline of the portal structure is arc-shaped, a triangular area will appear between the arch waist and the inverted arch. Only the outer row of steel bar connectors 110 can be arranged in this area, and the inner row of steel bar connectors 109 cannot be arranged. Therefore, in the prior art, the portal connection rigidity at this location is relatively weak. Therefore, multiple reinforcing steel bars 208 are added in this area to improve the rigidity of the portal connection in the bottom triangular area.

[0032] Furthermore, a top row of steel bar connectors 107 close to the top of the tunnel secondary lining 106 and a bottom row of steel bar connectors 108 away from the top of the tunnel secondary lining 106 are provided at the interface between the station end wall 201 and the arch. The top row of steel bar connectors 107 and the bottom row of steel bar connectors 108 are parallel to each other and arranged horizontally.

[0033] like Figure 2 and Figure 3 As shown, in this embodiment, the tunnel secondary lining 106 and the tunnel primary support 105 are arranged side by side longitudinally and close to the underground continuous wall 207 located at the interface between the station end wall 201 and the tunnel lining structure to improve the strength of the overall opening structure.

[0034] Among them, Figure 2As shown, since the tunnel primary support 105 and the tunnel secondary lining 106 at the top of the tunnel are restricted by the position of the station middle plate 204 and the shield ring frame beam 206, they cannot be directly connected to the station end wall 201. Therefore, the portal structure of the utility model adopts a "flat connection" structure connection. Specifically, the tunnel primary support 105 is arranged along the longitudinal direction of the tunnel close to the underground continuous wall 207, and the arch connection end of the tunnel secondary lining 106 adopts a Z-shaped structure. The tunnel secondary lining 106 sinks near the underground continuous wall 207, and after sinking, it extends at a 90° angle and abuts against the station end wall 201 (before the construction of the tunnel secondary lining 106, the part of the underground continuous wall 207 occupying the construction range of the secondary lining will be chiseled out). The end of the underground continuous wall 207 is embedded in the groove between the arch connection end and the station end wall 201, and the two sides of the underground continuous wall 207 are respectively connected to the end of the tunnel primary support 105 and the station end wall 201, thereby further improving the strength of the portal structure of the utility model.

[0035] like Figure 3 As shown, a station floor 203 is arranged at the bottom of the station end wall 201, and the outer side of the tunnel primary support 105 near the invert is connected to the upper end surface of the underground continuous wall 207. The invert connection end of the tunnel secondary lining 106, the end of the tunnel primary support 105 and the side of the underground continuous wall 207 are respectively closely attached to the station floor 203.

[0036] Compared with the prior art, the arch waist is connected to the station end wall 201 by "embedded" method and the arch top and the invert are partially connected by steel connectors. In addition, the arch top and the invert are connected to the station end wall 201 by "flat connection". This combined structure further improves the connection stiffness and the integrity rate of the steel connectors.

[0037] like Figure 1 and Figure 4 As shown, since the side walls of the tunnel lining structure on both sides do not have the constraints of the top and bottom of the tunnel, the side walls of the tunnel lining structure can directly penetrate into the station end wall 201, so the station end wall 201 range and the range below the arch foot of the lining structure above the station floor 203 adopt an embedded connection method. For this reason, the station end wall 201 is provided with embedded steel bars 111. When the station end wall 201 is constructed, the station end wall 201 is provided with an end wall opening edge line 205. The side wall embedded steel bars 111 are pre-buried in the station end wall 201 along the end wall opening edge line 205 in double rows, and are perpendicular to the station end wall 201 to connect the station end wall 201 and the tunnel lining structure. In order to obtain a better effect, the length of the side wall embedded steel bars 111 is 1000+tmm, of which the length anchored in the station end wall 201 is 1000mm, and the length anchored in the tunnel lining structure is t-40mm, and t is the secondary lining thickness of the tunnel lining structure.

[0038] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. A portal structure at the interface of a mining tunnel and a subway station, comprising a station end wall (201) and a tunnel lining structure connected to the portal interface of the station end wall (201), wherein the tunnel secondary lining (106) of the tunnel lining structure comprises an arch located at the top, two haunches connected to the two ends of the arch respectively, and an invert connected to the bottom of the two haunches, characterized in that: The station end wall (201) is pre-embedded with steel bar connectors at the interface with the arch and the invert along the length direction of the tunnel secondary lining (106), and the pre-embedded steel bars of the arch and the invert are connected with the pre-embedded steel bar connectors of the station end wall (201); the station end wall (201) is pre-embedded with a plurality of embedded steel bars (111) along the radial direction of the side wall of the tunnel portal, one end of the embedded steel bar (111) is deeply embedded in the inner wall of the tunnel portal of the station end wall (201), and the other end is connected to the tunnel secondary lining (106); The two girdles of the secondary tunnel lining (106) extend into the portal interface of the station end wall (201) and fit the portal side walls. The two girdles of the secondary tunnel lining (106) are connected to the portal side walls of the station end wall (201) through the embedded steel bars (111).

2. The portal structure at the interface between a mining tunnel and a subway station according to claim 1, characterized in that: An inner row of steel bar connectors (109) close to the inner side of the tunnel secondary lining (106) and an outer row of steel bar connectors (110) away from the inner side of the tunnel secondary lining (106) are pre-buried at the interface between the station end wall (201) and the inverted arch. The inner row of steel bar connectors (109) are parallel to the outer row of steel bar connectors (110). Each of the inner row of steel bar connectors (109) and the outer row of steel bar connectors (110) is vertically arranged on the station end wall (201).

3. The portal structure at the interface between a mining tunnel and a subway station according to claim 2 is characterized in that: It also includes a plurality of reinforcing steel bars (208), the arrangement length of the outer row of steel bar connectors (110) is greater than the arrangement length of the inner row of steel bar connectors (109), and the arc-shaped arrangement of the outer row of steel bar connectors (110) extends to the triangular area between the arch waist and the invert arch; the reinforcing steel bar (208) is located in the triangular area, one end of the reinforcing steel bar (208) is connected to the inside of the tunnel secondary lining (106), and the other end is connected to the bottom of the station end wall (201).

4. The portal structure at the interface between a mining tunnel and a subway station according to claim 1, characterized in that: A top row of steel bar connectors (107) close to the top of the tunnel secondary lining (106) and a bottom row of steel bar connectors (108) away from the top of the tunnel secondary lining (106) are arranged at the interface between the station end wall (201) and the arch, and the top row of steel bar connectors (107) and the bottom row of steel bar connectors (108) are parallel to each other and arranged horizontally.

5. The portal structure at the interface between a mining tunnel and a subway station according to claim 1, characterized in that: The tunnel lining structure comprises a tunnel primary support (105) which is sleeved outside the tunnel secondary lining (106); the tunnel secondary lining (106) and the tunnel primary support (105) are arranged side by side longitudinally and are closely attached to an underground continuous wall (207) located at the interface between the station end wall (201) and the tunnel lining structure.

6. The portal structure at the interface between a mining tunnel and a subway station according to claim 5, characterized in that: The tunnel secondary lining (106) is connected to the arch connection end of the station end wall (201) in a Z-shaped structure, the end of the underground continuous wall (207) is located in the groove between the arch connection end and the station end wall (201), and the two sides of the underground continuous wall (207) are respectively connected to the end of the tunnel primary branch (105) and the side of the station end wall (201).

7. The portal structure at the interface between a mining tunnel and a subway station according to claim 5, characterized in that: A station floor (203) is arranged at the bottom of the station end wall (201), and the outer side of the tunnel primary support (105) close to the inverted arch is connected to the upper end surface of the underground continuous wall (207); the inverted arch connection end of the tunnel secondary lining (106), the end of the tunnel primary support (105) and the side surface of the underground continuous wall are respectively closely attached to the end of the station floor (203).

8. The portal structure at the interface between a mining tunnel and a subway station according to claim 1, characterized in that: The length of the embedded steel bar (111) is 1000+t mm, the length of the embedded steel bar (111) anchored in the station end wall (201) is 1000 mm, the length of the embedded steel bar (111) anchored in the tunnel lining structure is t-40 mm, and t is the thickness of the tunnel secondary lining (106).

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