CN110792457A - Tunnel portal structure installation method for shield tunneling through mine tunnel - Google Patents
Tunnel portal structure installation method for shield tunneling through mine tunnel Download PDFInfo
- Publication number
- CN110792457A CN110792457A CN201910966482.9A CN201910966482A CN110792457A CN 110792457 A CN110792457 A CN 110792457A CN 201910966482 A CN201910966482 A CN 201910966482A CN 110792457 A CN110792457 A CN 110792457A
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- Prior art keywords
- tunnel
- portal
- steel ring
- concrete
- mine
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
- E21D11/36—Linings or supports specially shaped for tunnels or galleries of irregular cross-section
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
Abstract
The invention discloses a tunnel portal structure installation method of a shield tunneling mine-crossing tunnel, wherein the tunnel is constructed by combining a mine method and a shield tunneling method, a portal structure is installed at the junction of the mine method tunnel and the shield tunneling tunnel, the portal structure comprises a portal steel ring and a portal sealing device, and the installation method of the portal structure comprises the following steps: the method comprises the steps of pre-embedding the bottom of a portal steel ring into a concrete receiving strip beam poured at the bottom of a mine tunnel, connecting the side edge of the portal steel ring with a tunnel primary support steel frame, spraying concrete for fixing, connecting and fixing the top of the portal steel ring with a steel frame at the top of the tunnel through a steel bar net piece, spraying concrete for sealing an arch crown area, and temporarily spraying concrete for sealing a tunnel face of a portal structure before a rectangular shield top excavator is driven out of a shield top excavation tunnel. The tunnel portal structure and the mine tunnel primary support structure form an integral stress system, and the tunnel portal structure is effectively prevented from being damaged in the process of exiting the tunnel by the rectangular shield top excavator, so that subsequent construction is influenced.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a tunnel portal structure installation method of a rectangular shield tunneling mine-crossing tunnel.
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 from collapsing at the junction of the mining method tunnel and the rectangular shield top excavation tunnel, how to install a tunnel door structure at the junction position and ensure that the rectangular shield top excavation machine smoothly goes out of the tunnel and then enters the mining method tunnel section is a problem which is urgently needed to be solved at present.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the tunnel portal structure installation method for the rectangular shield top-excavation mine-method tunnel can effectively improve the integrity and stability of the tunnel portal structure, so that the rectangular shield top-excavation machine can be guaranteed to smoothly exit the tunnel and enter the mine-method tunnel section.
The technical scheme of the invention is realized as follows: a tunnel portal structure installation method of a tunnel adopting a shield tunneling mine-crossing method is characterized in that the tunnel is constructed in a mode of combining a mine method and a shield tunneling method, and the tunnel portal structure installation method comprises the following steps: the method comprises the following steps of installing a portal structure at the junction of a mine method tunnel and a shield tunneling tunnel, wherein the portal structure comprises a portal steel ring and a portal sealing device, and the installation method of the portal structure comprises the following steps: the method comprises the steps of arranging a portal steel ring at the end part, close to a shield top-dug tunnel, in the mining tunnel, embedding the bottom of the portal steel ring in a concrete receiving strip beam poured at the bottom of the mining tunnel, connecting the side edge of the portal steel ring with a tunnel primary support steel frame and spraying concrete for fixation, connecting and fixing the top of the portal steel ring with a steel frame at the top of the tunnel through a steel bar net piece and spraying concrete for sealing a vault area, and temporarily spraying concrete for sealing the tunnel face of the portal structure before a rectangular shield top-dug machine exits the shield top-dug tunnel.
The invention relates to a tunnel portal structure installation method of a shield tunneling through mine tunnel, which comprises the steps of pouring concrete at the bottom of the mine tunnel to form a receiving strip beam, installing two rails on the top surface of the receiving strip beam, wrapping the bottom of a tunnel portal steel ring by the concrete poured at the bottom of the mine tunnel, and forming the concrete and the bottom of the tunnel portal steel ring into a whole after the concrete is solidified.
The invention relates to a tunnel portal structure installation method of a shield tunneling mine-crossing tunnel, which is characterized in that inner-layer longitudinal connecting ribs and outer-layer longitudinal connecting ribs are respectively arranged on the inner side and the outer side of the side edge of a tunnel portal steel ring, the tunnel portal steel ring is installed between adjacent tunnel primary support steel frames, the tunnel portal steel ring is fixedly connected with the inner-layer longitudinal connecting ribs and the outer-layer longitudinal connecting ribs, the inner-layer longitudinal connecting ribs and the outer-layer longitudinal connecting ribs are connected with the tunnel primary support steel frames, and the side edge of the tunnel portal steel ring is connected with the tunnel primary support steel frames into an integral structure through the inner-layer longitudinal connecting ribs and the.
The invention relates to a tunnel portal structure installation method of a shield top-excavation mine-crossing tunnel, which is characterized in that a plurality of steel bar net pieces are installed on front and rear steel frames in the top of the tunnel corresponding to the top of a tunnel portal steel ring along the width direction of the tunnel, the steel bar net pieces extend downwards and are respectively connected and fixed with the front end surface and the rear end surface of the top of the tunnel portal steel ring, and the top of the tunnel portal steel ring is connected with the steel frame at the top of the tunnel into an integral structure through the steel bar net pieces.
The tunnel portal structure installation method of the shield tunneling mine-crossing tunnel comprises the steps of temporarily spraying concrete on the tunnel portal surface of the tunnel portal structure to form a tunnel portal concrete structure, spraying concrete by using a steel bar mesh hanging mode at the top of the tunnel portal structure, spraying concrete by using plain spraying concrete at the bottom of the tunnel portal structure, and finally forming to obtain the tunnel portal concrete structure with the top thicker than the bottom thicker.
According to the invention, the portal structure with the sealing device is arranged at the junction of the mining tunnel and the rectangular shield top-driving tunnel, and the portal structure, the primary support structure of the mining tunnel and the receiving bottom plate concrete are arranged together to form a whole, so that the portal structure and the primary support structure of the mining tunnel form an integral stress system, the portal structure is effectively prevented from being damaged in the process of going out of the tunnel by the rectangular shield top-driving machine, and subsequent construction is influenced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the structure of the portal of the present invention.
FIG. 3 is a schematic view of the installation and fixation of the bottom of the steel ring of the portal in the invention.
FIG. 4 is a schematic view of the installation and fixation of the steel ring side of the hole door of the present invention.
FIG. 5 is a schematic view of the installation and fixation of the top of the steel portal in the invention.
FIG. 6 is a closed view of the tunnel face of the rectangular shield tunneling machine before exiting the tunnel.
The labels in the figure are: the tunnel comprises a mine method tunnel 1, a shield top excavation tunnel 2, a portal steel ring 3, a portal sealing device 4, a receiving strip beam 5, a tunnel primary support steel frame 6, a reinforcing mesh piece 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 excavation machine 13.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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 structure installation method for shield-tunneling mine-through tunnel, the tunnel is constructed by combining the mining method and the shield-tunneling method, the tunnel structure is installed at the junction of the mining tunnel 1 and the shield-tunneling tunnel 2, the tunnel structure comprises a tunnel portal steel ring 3 and a tunnel portal sealing device 4, the tunnel portal sealing device 4 comprises an embedded steel plate, a rubber plate and a pressing plate, the embedded steel plate is arranged in the tunnel portal steel ring, a plurality of rubber plates are arranged along the edge of the tunnel portal to form a curtain-cloth type structure, the outer end of each rubber plate is connected and fixed with the embedded steel plate through the pressing plate, the inner end of the rubber plate extends inwards, the opening size formed by the plurality of rubber plates is smaller than the opening size of the tunnel portal, when the front end of the rectangular shield-tunneling machine 13 is arranged in the tunnel portal, the rubber plate is bent along the operation direction of the rectangular shield-tunneling machine, and the sealing is formed by matching the rectangular shield top excavator with a shell of the rectangular shield top excavator, so that various kinds of slurry and underground water which flow 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 installation method of the tunnel door structure comprises the following steps: the method comprises the steps of arranging a portal steel ring 3 at one side end part close to a shield top-excavated tunnel 2 in a mining tunnel 1, embedding the bottom of the portal steel ring 3 in a concrete receiving strip beam 5 poured at the bottom of the mining tunnel 1, connecting the side edge of the portal steel ring 3 with a tunnel primary support steel frame 6 and spraying concrete for fixation, connecting and fixing the top of the portal steel ring 3 with a steel frame 8 at the top of the tunnel through a steel mesh 7 and spraying concrete for sealing a vault area, and temporarily spraying concrete for sealing a tunnel face of the portal structure before a rectangular shield top-excavated machine 13 exits the shield top-excavated tunnel 2 so as to prevent a large amount of muck from caving down. According to the tunnel portal structure, the tunnel portal structure and the primary support structure of the mine tunnel form an integral stress system through the installation design of the tunnel portal steel ring and the mine tunnel, the integrity and the stability of the tunnel portal structure are improved, the damage of the tunnel portal structure caused in the process of exiting the tunnel of the rectangular shield top excavator is effectively prevented, the subsequent construction is influenced, meanwhile, the tunnel portal structure can also effectively prevent the collapse of stratum soil bodies in the process of exiting the tunnel of the rectangular shield top excavator, so that the construction safety is improved, and the guarantee is provided for the safe and smooth exiting of the top excavator.
As shown in fig. 3, concrete is poured at the bottom of the mining tunnel 1 to form a receiving strip beam 5, the thickness of the receiving strip beam 5 is 18cm, two rails 9 are installed on the top surface of the receiving strip beam 5 and used for smoothly receiving a rectangular shield top excavator, the concrete poured at the bottom of the mining tunnel 1 wraps the bottom of the portal steel ring 3, and the concrete and the bottom of the portal steel ring 3 are formed into a whole after being solidified.
As shown in fig. 4, inner longitudinal connecting ribs 10 and outer longitudinal connecting ribs 11 are respectively arranged on the inner side and the outer side of the portal steel ring 3, the inner longitudinal connecting ribs and the outer longitudinal connecting ribs are vertically and alternately arranged, the portal steel ring 3 is installed between adjacent tunnel primary support steel frames 6, the portal steel ring 3 is fixedly connected with the inner longitudinal connecting ribs and the outer longitudinal connecting ribs, the inner longitudinal connecting ribs and the outer longitudinal connecting ribs are connected with the tunnel primary support steel frames 6, and the side of the portal steel ring 3 is connected with the tunnel primary support steel frames 6 through the inner longitudinal connecting ribs and the outer longitudinal connecting ribs to form an integral structure.
As shown in fig. 5, a plurality of reinforcing mesh sheets 7 are mounted on the front and rear steel frames 8 in the tunnel top corresponding to the top of the portal steel ring 3 and along the width direction of the tunnel, the reinforcing mesh sheets 7 extend downward and are respectively connected and fixed with the front and rear end surfaces of the top of the portal steel ring 3, the lengths of the reinforcing mesh sheets are gradually decreased from the middle of the vault area to the two sides and are arranged at equal intervals, and the top of the portal steel ring 3 is connected with the steel frames 8 at the top of the tunnel through the reinforcing mesh sheets 7 to form an integral structure.
As shown in FIG. 6, the tunnel face concrete structure 12 formed by temporarily spraying concrete on the tunnel face of the portal structure has a top concrete sprayed with a steel bar net, a top thickness of 20cm, a bottom concrete sprayed with plain concrete, and a bottom thickness of 10 cm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A tunnel portal structure installation method of a tunnel adopting a shield tunneling mine-crossing method is characterized in that the tunnel is constructed in a mode of combining a mine method and a shield tunneling method, and the tunnel portal structure installation method comprises the following steps: the method comprises the following steps of installing a portal structure at the junction of a mine method tunnel and a shield tunneling tunnel, wherein the portal structure comprises a portal steel ring and a portal sealing device, and the installation method of the portal structure comprises the following steps: the method comprises the steps of arranging a portal steel ring at the end part, close to a shield top-dug tunnel, in the mining tunnel, embedding the bottom of the portal steel ring in a concrete receiving strip beam poured at the bottom of the mining tunnel, connecting the side edge of the portal steel ring with a tunnel primary support steel frame and spraying concrete for fixation, connecting and fixing the top of the portal steel ring with a steel frame at the top of the tunnel through a steel bar net piece and spraying concrete for sealing a vault area, and temporarily spraying concrete for sealing the tunnel face of the portal structure before a rectangular shield top-dug machine exits the shield top-dug tunnel.
2. The method for installing the portal structure of the shield tunneling mine-method tunnel according to claim 1, wherein: and pouring concrete at the bottom of the mine-method tunnel to form a receiving strip beam, installing two rails on the top surface of the receiving strip beam, wrapping the bottom of the portal steel ring by the concrete poured at the bottom of the mine-method tunnel, and forming the concrete and the bottom of the portal steel ring into a whole after the concrete is solidified.
3. The method for installing the portal structure of the shield tunneling mine-method tunnel according to claim 1, wherein: the tunnel portal steel ring is characterized in that inner longitudinal connecting ribs and outer longitudinal connecting ribs are arranged on the inner side and the outer side of the side edge of the tunnel portal steel ring respectively, the tunnel portal steel ring is installed between adjacent tunnel primary-support steel frames, the tunnel portal steel ring is fixedly connected with the inner longitudinal connecting ribs and the outer longitudinal connecting ribs, the inner longitudinal connecting ribs and the outer longitudinal connecting ribs are connected with the tunnel primary-support steel frames, and the side edge of the tunnel portal steel ring is connected with the tunnel primary-support steel frames through the inner longitudinal connecting ribs and the outer longitudinal connecting ribs into a whole.
4. The method for installing the portal structure of the shield tunneling mine-method tunnel according to claim 1, wherein: and a plurality of reinforcing mesh pieces are arranged on the front steel frame and the rear steel frame in the tunnel top corresponding to the top of the portal steel ring and along the width direction of the tunnel, the reinforcing mesh pieces extend downwards and are respectively connected and fixed with the front end surface and the rear end surface of the top of the portal steel ring, and the top of the portal steel ring is connected with the steel frame at the top of the tunnel through the reinforcing mesh pieces to form an integral structure.
5. The method for installing the portal structure of the shield tunneling mine-method tunnel according to claim 1, wherein: the tunnel face concrete structure formed by temporarily spraying concrete on the tunnel face of the tunnel portal structure is characterized in that concrete is sprayed on the top of the tunnel face concrete structure by adopting a steel bar hanging net, concrete is sprayed on the bottom of the tunnel face concrete structure by adopting plain sprayed concrete, and after final forming, the thickness of the top of the tunnel face concrete structure is larger than that of the bottom of the tunnel face concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910966482.9A CN110792457A (en) | 2019-10-12 | 2019-10-12 | Tunnel portal structure installation method for shield tunneling through mine tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910966482.9A CN110792457A (en) | 2019-10-12 | 2019-10-12 | Tunnel portal structure installation method for shield tunneling through mine tunnel |
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| CN110792457A true CN110792457A (en) | 2020-02-14 |
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| CN201910966482.9A Pending CN110792457A (en) | 2019-10-12 | 2019-10-12 | Tunnel portal structure installation method for shield tunneling through mine tunnel |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1576260A (en) * | 1976-12-16 | 1980-10-08 | Gewerk Eisenhuette Westfalia | Tunnelling shield apparatus |
| CN103711504A (en) * | 2013-12-18 | 2014-04-09 | 西南交通大学 | Propelling method for combined portion between shield tunnel segment and mine tunnel segment in subway tunnel |
| CN104500082A (en) * | 2014-12-29 | 2015-04-08 | 上海市基础工程集团有限公司 | Mining-method tunnel inner shield receiving construction method |
| CN108661652A (en) * | 2018-06-01 | 2018-10-16 | 广州地铁设计研究院有限公司 | Shield launching and reception end bracing means and method in Tunneling by mining method |
| CN108915702A (en) * | 2018-06-12 | 2018-11-30 | 中铁二十局集团轨道交通工程有限公司 | It is a kind of circle narrow-bore tunnel in shield method of reseptance |
-
2019
- 2019-10-12 CN CN201910966482.9A patent/CN110792457A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1576260A (en) * | 1976-12-16 | 1980-10-08 | Gewerk Eisenhuette Westfalia | Tunnelling shield apparatus |
| CN103711504A (en) * | 2013-12-18 | 2014-04-09 | 西南交通大学 | Propelling method for combined portion between shield tunnel segment and mine tunnel segment in subway tunnel |
| CN104500082A (en) * | 2014-12-29 | 2015-04-08 | 上海市基础工程集团有限公司 | Mining-method tunnel inner shield receiving construction method |
| CN108661652A (en) * | 2018-06-01 | 2018-10-16 | 广州地铁设计研究院有限公司 | Shield launching and reception end bracing means and method in Tunneling by mining method |
| CN108915702A (en) * | 2018-06-12 | 2018-11-30 | 中铁二十局集团轨道交通工程有限公司 | It is a kind of circle narrow-bore tunnel in shield method of reseptance |
Non-Patent Citations (3)
| Title |
|---|
| 刘建国: "深圳地铁盾构隧道施工技术与经验", 《隧道建设》 * |
| 卿三惠等: "《土木工程施工工艺隧道及地铁工程》", 31 October 2013, 中国铁道出版社 * |
| 李剑明: "盾构空推过矿山法隧道新工艺", 《隧道/地下工程》 * |
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Application publication date: 20200214 |