CN211201987U - Tunnel portal structure of shield tunneling through mine tunnel - Google Patents
Tunnel portal structure of shield tunneling through mine tunnel Download PDFInfo
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- CN211201987U CN211201987U CN201921713723.0U CN201921713723U CN211201987U CN 211201987 U CN211201987 U CN 211201987U CN 201921713723 U CN201921713723 U CN 201921713723U CN 211201987 U CN211201987 U CN 211201987U
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Abstract
The utility model discloses a tunnel portal structure of mine method tunnel is dug on shield structure top, the tunnel portal structure sets up the juncture in mine method tunnel and shield structure top tunnel, the tunnel portal structure includes portal steel ring and portal sealing device, the bottom of portal steel ring is pre-buried in the concrete reception strip beam of pouring in mine method tunnel bottom, the side and the tunnel of portal steel ring are just supported the steelframe and are connected and spout the concrete and fix, the top of portal steel ring is connected fixedly and is spouted the concrete through reinforcing bar net piece and the steelframe at tunnel top and seals the vault region. The utility model discloses form whole atress system with portal structure and mine method tunnel first supporting structure, effectively prevent that the rectangle shield from constructing the top digger and causing this portal structure to damage in the in-process of going out the hole, and influence follow-up construction, this portal structure is showing moreover and has reduced the rectangle shield and has constructed the top digger and get into all kinds of mud and the groundwater in mine method tunnel of surging in-process of mine method tunnel, provides the condition for follow-up construction.
Description
Technical Field
The utility model belongs to the technical field of the construction, in particular to portal structure in mine method tunnel is dug on rectangle shield structure top.
Background
The rectangular shield top excavation construction technology is a novel non-excavation construction technology, a rectangular shield top excavation machine is utilized to excavate in a stratum, and a pipe section enters the stratum along with the top excavation machine to form a tunnel main body structure.
Under general conditions, the depth of soil covering of a tunnel in a rectangular shield top excavation method is not large, generally about 5-8 m, various municipal pipelines often need to be penetrated through in a short distance in the construction process, and when the municipal pipelines with deeper buried depth and larger pipe diameter meet, the pipeline obstacles cannot be eliminated by means of a top excavation machine due to the fact that the torque of a cutter head of the rectangular shield top excavation machine is limited in the current stage. In this case, if the condition for disposing the pipeline obstacle from the ground is not satisfied, the pipeline obstacle is usually constructed from the other end of the tunnel to the position of the pipeline obstacle by a mining method, and then disposed of, thereby providing a condition for penetrating the following rectangular shield tunneling tunnel.
Because a large amount of antifriction mud and improved mud are needed in the rectangular shield top excavation construction process, in order to prevent a large amount of mud from gushing out, water from gushing out and sand from gushing out or stratum soil body from collapsing at the junction of the mining method tunnel and the rectangular shield top excavation tunnel, a tunnel door structure is arranged at the junction position, and the rectangular shield top excavation machine is guaranteed to smoothly go out of the tunnel and enter the mining method tunnel section, so that the problem which needs to be solved at present is urgently solved.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the existing problems, the tunnel door structure of the shield top-excavation mine-method tunnel is provided, which can ensure that the rectangular shield top-excavation machine smoothly exits the tunnel and enters the mine-method tunnel section, and simultaneously reduce the inflow of various kinds of slurry and underground water into the mine-method tunnel in the process.
The technical scheme of the utility model is realized like this: the utility model provides a shield constructs portal structure that digs over mine method tunnel which characterized in that: the tunnel portal structure is arranged at the junction of the mine tunnel and the shield top-driving tunnel, and comprises a tunnel portal steel ring and a tunnel portal sealing device, the bottom of the tunnel portal steel ring is embedded in a concrete receiving strip beam poured at the bottom of the mine tunnel, the side edge of the tunnel portal steel ring is connected with a tunnel primary support steel frame and is fixed by spraying concrete, and the top of the tunnel portal steel ring is fixedly connected with a steel frame at the top of the tunnel through a steel bar net piece and is sealed with a vault area by spraying concrete.
The tunnel portal structure of mine method tunnel is dug on shield structure top, its the bottom of tunnel portal steel loop adopts the concrete to seal the concrete receiving strip beam top surface is provided with two tracks.
Shield constructs portal structure of top excavation cross mine method tunnel, its portal steel ring's side is through inlayer longitudinal tie muscle and outer longitudinal tie muscle and tunnel primary support steelframe welded fastening.
Shield constructs portal structure of top excavation cross mine method tunnel, its two pin steelframes in front and back are connected with reinforcing bar net piece respectively in the tunnel top that portal steel ring top corresponds, reinforcing bar net piece lower extreme and portal steel ring's top front and back terminal surface are connected fixedly.
The utility model discloses a set up the portal structure that has sealing device in mine method tunnel and rectangle shield structure top tunnel juncture, and link together portal structure and mine method tunnel primary support structure and receiving the bottom plate concrete and form wholly, portal structure and mine method tunnel just prop up the structure and form whole atress system, prevent effectively that the rectangle shield from constructing the top and dig the machine and cause this portal structure to damage in the process of digging out, and influence follow-up construction, and this portal structure is showing and has reduced the rectangle shield and has constructed the top and dig the machine and get into all kinds of mud and the groundwater in the mine method tunnel in-process, provide the condition for follow-up construction.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure of the middle hole door of the present invention.
Fig. 3 is the bottom installation and fixation schematic view of the steel ring of the middle hole door of the utility model.
Fig. 4 is the schematic view of the installation and fixation of the side edge of the steel ring of the middle hole door of the utility model.
Fig. 5 is the fixed schematic view of the installation of the steel top of the middle hole door of the utility model.
Fig. 6 is a tunnel face closed view before the middle rectangular shield top excavator goes out of the tunnel.
The labels in the figure are: the tunnel comprises a mine tunnel 1, a shield top-driving tunnel 2, a portal steel ring 3, a portal sealing device 4, a concrete receiving strip beam 5, a tunnel primary support steel frame 6, a reinforcing mesh 7, a steel frame 8, a track 9, an inner-layer longitudinal connecting rib 10, an outer-layer longitudinal connecting rib 11, a tunnel face concrete structure 12 and a rectangular shield top-driving machine 13.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 5, a tunnel portal structure of a shield tunneling through-mine tunnel, the tunnel portal structure being disposed at the intersection between a mine tunnel 1 and a shield tunneling tunnel 2, the tunnel portal structure comprising a tunnel portal steel ring 3 and a tunnel portal sealing device 4, the tunnel portal sealing device 4 comprising an embedded steel plate, a rubber plate and a pressing plate, the embedded steel plate being disposed in the tunnel portal steel ring, a plurality of rubber plates being arranged along the edge of the tunnel portal to form a curtain cloth type structure, the outer end of each rubber plate being connected and fixed to the embedded steel plate via the pressing plate, the inner end of the rubber plate extending inward, the size of the opening formed by the plurality of rubber plates being smaller than the size of the tunnel portal, when the front end of the rectangular shield tunneling machine 13 is disposed in the tunnel portal, the inner end of the rubber plate being bent along the running direction of the rectangular shield tunneling machine and cooperating with the housing of the rectangular shield tunneling machine to form a shield seal, therefore, various kinds of slurry and underground water rushing into the mine method tunnel in the process that the rectangular shield top excavator enters the mine method tunnel are obviously reduced, and conditions are provided for subsequent construction; the bottom of the portal steel ring 3 is embedded in a concrete receiving strip beam 5 poured at the bottom of the mine-method tunnel 1, the side edge of the portal steel ring 3 is connected with a tunnel primary support steel frame 6 and is fixed by spraying concrete, and the top of the portal steel ring 3 is connected and fixed with a steel frame 8 at the top of the tunnel through a steel mesh 7 and is sealed in the vault area by spraying concrete. The utility model discloses a connection structure design in portal steel loop and mine method tunnel makes portal structure and mine method tunnel just prop up the structure and form whole atress system, the wholeness and the stability of portal structure have been improved, prevent effectively that the rectangle shield from pushing up the machine of digging out the hole in-process and cause this portal structure to damage, influence follow-up construction, this portal structure of should digging simultaneously can also prevent effectively that the rectangle shield from pushing up the machine of digging out the hole in-process stratum soil body and collapse, thereby construction safety has been improved, and for the safe smooth hole of digging out of the hole of machine is excavated to the top provides the guarantee.
In this embodiment, the bottom of the portal steel ring 3 is encapsulated by concrete, the thickness of the portal steel ring is 18cm, two rails 9 are arranged on the top surface of the concrete receiving strip beam 5 and used for smoothly receiving a rectangular shield top excavator, the side edge of the portal steel ring 3 is welded and fixed with a tunnel primary support steel frame 6 through an inner layer longitudinal connecting rib 10 and an outer layer longitudinal connecting rib 11, the inner layer longitudinal connecting rib and the outer layer longitudinal connecting rib are alternately arranged in the vertical direction, the portal steel ring is arranged between adjacent tunnel primary support steel frames 6, a front steel frame 8 and a rear steel frame 8 in the tunnel top corresponding to the top of the portal steel ring 3 are respectively connected with a reinforcing mesh 7, the lower end of the reinforcing mesh 7 is connected and fixed with the front end face and the rear end face of the top of the portal steel ring 3, and the lengths of the reinforcing mesh are gradually decreased from the middle of a vault area to two sides and are.
As shown in figure 6, before the rectangular shield top excavator 13 leaves the tunnel, the tunnel face of the tunnel portal structure is temporarily sprayed with concrete for sealing to prevent a large amount of muck from caving, the top of the tunnel face concrete structure 12 is hung with a reinforcing mesh for spraying concrete, the top is 20cm thick, the bottom is sprayed with plain concrete, and the bottom is 10cm thick.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The utility model provides a shield constructs portal structure that digs over mine method tunnel which characterized in that: the tunnel portal structure is arranged at the junction of a mine method tunnel (1) and a shield top excavation tunnel (2), and comprises a tunnel portal steel ring (3) and a tunnel portal sealing device (4), the bottom of the tunnel portal steel ring (3) is embedded in a concrete receiving strip beam (5) poured at the bottom of the mine method tunnel (1), the side edge of the tunnel portal steel ring (3) is connected with a tunnel primary support steel frame (6) and fixed by spraying concrete, and the top of the tunnel portal steel ring (3) is connected and fixed with a steel frame (8) at the top of the tunnel through a steel mesh sheet (7) and is sealed with a vault area by spraying concrete.
2. The portal structure of a shield tunneling mine-method tunnel according to claim 1, characterized in that: the bottom of the portal steel ring (3) is encapsulated by concrete, and two rails (9) are arranged on the top surface of the concrete receiving strip beam (5).
3. The portal structure of a shield tunneling mine-method tunnel according to claim 1, characterized in that: the side edge of the portal steel ring (3) is welded and fixed with the tunnel primary support steel frame (6) through the inner layer longitudinal connecting rib (10) and the outer layer longitudinal connecting rib (11).
4. The portal structure of a shield tunneling mine-method tunnel according to claim 1, characterized in that: and the front steel frame (8) and the rear steel frame (8) in the tunnel top corresponding to the top of the portal steel ring (3) are respectively connected with a reinforcing mesh (7), and the lower end of the reinforcing mesh (7) is fixedly connected with the front end face and the rear end face of the top of the portal steel ring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921713723.0U CN211201987U (en) | 2019-10-12 | 2019-10-12 | Tunnel portal structure of shield tunneling through mine tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921713723.0U CN211201987U (en) | 2019-10-12 | 2019-10-12 | Tunnel portal structure of shield tunneling through mine tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211201987U true CN211201987U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921713723.0U Active CN211201987U (en) | 2019-10-12 | 2019-10-12 | Tunnel portal structure of shield tunneling through mine tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211201987U (en) |
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2019
- 2019-10-12 CN CN201921713723.0U patent/CN211201987U/en active Active
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