CN110985025B - Method for reconstructing shield tunnel to carry out mine construction - Google Patents
Method for reconstructing shield tunnel to carry out mine construction Download PDFInfo
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- CN110985025B CN110985025B CN201911291697.1A CN201911291697A CN110985025B CN 110985025 B CN110985025 B CN 110985025B CN 201911291697 A CN201911291697 A CN 201911291697A CN 110985025 B CN110985025 B CN 110985025B
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- 238000000034 method Methods 0.000 title claims abstract description 146
- 238000010276 construction Methods 0.000 title claims abstract description 116
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- 230000005641 tunneling Effects 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 40
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- 238000005065 mining Methods 0.000 claims description 10
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- 239000002356 single layer Substances 0.000 claims description 6
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
- E21D9/0873—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines the shield being provided with devices for lining the tunnel, e.g. shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- 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 OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- 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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
- E21D11/386—Sealing means positioned between adjacent lining members inflatable sealing means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for reconstructing a shield tunnel to carry out mine construction, which comprises the following steps: firstly, construction preparation; secondly, removing the shell of the shield tunneling machine; thirdly, constructing a horizontal road; protecting the tunnel by a shield method and excavating a transition section of the tunnel by a mine method; fifthly, forming a transition section of the mine tunnel; and sixthly, constructing the tunnel by a mine method. After the shield tunnel construction is completed, the shield machine is dismantled and disassembled in the tunnel, the shield machine is disassembled and then transported out, the formed shield tunnel transportation system and the pipeline arrangement are reconstructed and adjusted, shield tunnel protection measures are added, and a ring beam is applied at a transition section, so that the safety of the section is ensured, necessary conditions are provided for the mine construction, the mine construction is realized in the shield tunnel, the problem that the shield cannot be driven due to an accident condition and the mine construction needs to be continued is solved, or the difficulty of the mine construction tunnel construction is increased, and a working surface needs to be newly arranged in the shield tunnel, so that the section tunnel is ensured to be smoothly communicated.
Description
Technical Field
The invention belongs to the technical field of mine construction in shield tunnels, and particularly relates to a method for reconstructing a shield tunnel to carry out mine construction.
Background
Tunnel construction methods include shield methods, mine methods, open cut methods and the like, and one construction method is often adopted singly or a plurality of construction methods are adopted in sections in the construction process of a certain project and a certain interval. For interval tunnel engineering, a mining method and a shield method are often adopted for construction according to stratum sections of different sections, but uncertainty factors are many in the underground engineering construction process, construction difficulty is increased due to unexpected conditions such as water burst, sand burst and stratum change in the mining method construction process, and further the penetration of the whole interval is influenced, and the situation that the tunnel is difficult to continue construction due to unexpected conditions such as inaccurate stratum investigation and serious damage of equipment can also occur. At present, shield tunnel construction is performed in a mine tunnel, and shield construction is started by pushing a shield machine through the mine tunnel to an intersection surface.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for reconstructing a shield tunnel to carry out mine construction aiming at the defects in the prior art, after the shield tunnel construction is completed, the shield machine is dismantled in a tunnel, the shield machine is dismantled and transported out, a formed shield tunnel transportation system and pipeline arrangement are reconstructed and adjusted, shield tunnel protection measures are added, a ring beam is constructed at a transition section, the safety of a section is ensured, necessary conditions are provided for the mine construction, the mine construction is carried out in the shield tunnel, the problem that the shield cannot tunnel and the mine construction needs to be continued due to an accident condition is solved, or the difficulty of the mine construction tunnel construction is increased, a working surface needs to be newly arranged in the shield tunnel, the smooth penetration of the section tunnel is ensured, and the popularization and the use are convenient.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for reconstructing a shield tunnel to carry out mine construction is characterized by comprising the following steps:
firstly, construction preparation, namely reinforcing rock strata around a shield machine after the shield tunnel construction is in place, and performing waterproof treatment, wherein the process comprises the following steps:
step 101, filling grease into a shield tail by using a shield machine to protect a shield tail brush;
102, after the shield tunnel construction is in place, performing ring sealing grouting on the last 10 ring pipes of the shield tunnel construction, performing grouting construction by adopting double grout, and symmetrically injecting the grouting from bottom to top by adopting pipe pieces to reserve secondary grouting holes, wherein the grouting pressure is 0.3-0.4 bar; the grouting pressure and the duct piece are monitored in the grouting process, so that the duct piece is prevented from cracking or dislocation;
103, tensioning the last 10 ring pipes constructed by the shield method by using tensioning steel plates, wherein 6-8 tensioning steel plates are arranged in the last 10 ring pipes constructed by the shield method in the longitudinal direction, so that loose discharging of the perforated pipe pieces is prevented;
104, arranging a bearing steel plate and an arc-shaped steel plate on the last ring pipe ring constructed by the shield method, welding and plugging the bearing steel plate and the shield tail of the shield shell, fixedly welding the pre-buried steel plate, the arc-shaped steel plate and the shield shell in the last ring pipe ring constructed by the shield method through plugging reinforcing ribs, and filling micro-expansion cement into gaps between duct pieces and the shield tail of the shield shell through duct piece grouting holes;
105, arranging a plugging steel plate at the shield head of the shield shell, plugging a gap between the shield head of the shield shell and the surrounding rock, and injecting micro-expansion cement into a radial grouting hole of the middle shield for filling to plug the formation water around the shield body;
106, arranging an air-extracting smoke exhaust fan at the front side of the tunnel excavation surface to form convection with an original air supply fan in the tunnel, accelerating air circulation of a working surface and ensuring that smoke and dust in the tunnel are quickly exhausted;
step two, removing the shell of the shield tunneling machine: according to the sequence of a rear matching trolley, an assembling machine, a walking beam, an H frame, a motor, a man bin, a propulsion oil cylinder, a stone crusher, a cutter head and a main bearing, performing shell abandoning and disassembling construction in a hole, directly pulling out a tunnel after the rear matching trolley is disconnected, disassembling and cutting off the assembling machine, the walking beam, the H frame, the motor, the man bin, the propulsion oil cylinder, the stone crusher, the cutter head and the main bearing, then blocking and transporting out of the tunnel, and reserving a abandoned shield shell in situ;
step three, horizontal road construction: firstly, laying mold concrete on a pipe ring of a shield tunnel, wherein the maximum thickness of the mold concrete is 500-700 mm, and pre-burying a single-layer reinforcing mesh and a connecting reinforcing bar in the mold concrete; laying a concrete protective layer for protecting the single-layer reinforcing mesh on the molded concrete, wherein the connecting reinforcing steel bars are kept vertical; then pouring a ballast bed;
step four, protecting the tunnel by the shield method and excavating the transition section of the tunnel by the mine method: the method comprises the following steps that blasting is adopted for excavation of a transition section of a mine-method tunnel, a plurality of suspension bolts for suspending a protective door curtain are installed on the end face of the last ring pipe ring constructed by a shield method before blasting excavation of the transition section of the mine-method tunnel, the suspension bolts penetrate through bolt holes in the side face of the last ring pipe ring constructed by the shield method, the suspension bolts are used as door curtain suspension points, and the protective door curtain is made of a steel wire rope net;
then covering a segment protection layer on the last 3-5 rings of pipe rings constructed by the shield method, wherein the segment protection layer comprises a wood board bottom layer and a cotton layer protection layer laid on the wood board bottom layer;
in the construction process of the transition section of the mine tunnel, a transport vehicle is reversed from a shield initial station to enter an excavation surface and is driven out in the forward direction, and the shield initial station is used as a vehicle turning and equipment temporary storage area to output muck generated in the transition section of the mine tunnel;
the length of the transition section of the mine tunnel is 30-50 m;
step five, forming the transition section of the mine tunnel, wherein the process is as follows:
step 501, arranging a ring beam at one end, close to a mine method tunnel, of the last ring pipe ring constructed by the shield method, wherein the ring beam is of a reinforced concrete structure, reinforcing steel bars of the ring beam are fixedly connected with an embedded steel plate and a blocking reinforcing rib which are embedded in the last ring pipe ring constructed by the shield method, one end of the ring beam exceeds the outside of the pipe ring and is fixedly connected with a shield shell, and the other end of the ring beam extends into the pipe ring by 10 cm;
step 502, performing chiseling treatment in a construction joint between a ring beam and the last ring pipe ring constructed by the shield method, and arranging a water-swelling water stop strip and a grouting pipe;
503, performing secondary lining construction on the transition section of the mine tunnel, constructing a secondary lining of the transition section of the mine tunnel, synchronously pouring ring beam concrete pouring and secondary lining concrete pouring, and simultaneously performing extension lining construction on one side of the ring beam, which is far away from the transition section of the mine tunnel, constructing an extension lining of the transition section of the mine tunnel, wherein the extension lining extends into the last 3-5 rings of pipe rings of shield construction;
sixthly, constructing the tunnel by a mining method: and in the construction process of the mine method tunnel, the transport vehicle utilizes the mine method tunnel as a vehicle turning and equipment storage area to output the newly generated muck of the mine method tunnel.
The method for reconstructing the shield tunnel to carry out the mine construction is characterized by comprising the following steps: in step 501, the pre-buried steel plate is arranged in the last ring pipe ring through the anchoring rib.
The method for reconstructing the shield tunnel to carry out the mine construction is characterized by comprising the following steps: and (3) adjusting pipelines while constructing the horizontal road in the third step until the construction requirements of a mine method are met, wherein the pipelines comprise ventilation pipes, water supply pipes, blow-off pipes, high-voltage cables, lighting lines, communication lines, walkway plate pipelines and transformer pipelines, and the transformer pipelines are disassembled from the shield tunneling machine and then are installed on the side wall of the duct piece through a bolt erection platform.
The method for reconstructing the shield tunnel to carry out the mine construction is characterized by comprising the following steps: in the fourth step, the mesh diameter of the steel wire rope net is 100 mm-200 mm.
The method for reconstructing the shield tunnel to carry out the mine construction is characterized by comprising the following steps: the number of the suspension bolts in the fourth step is 8-10, and the 8-10 suspension bolts are uniformly arranged on the end face of the last annular pipe ring constructed by the shield method.
The method for reconstructing the shield tunnel to carry out the mine construction is characterized by comprising the following steps: in step 104, the micro-expansive cement is AEC micro-expansive cement.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, after the shield method tunnel construction is in place, the peripheral rock stratum of the shield machine is reinforced and subjected to waterproof treatment, the segment at the tail part of the shield machine is strictly blocked by underground water through micro-expansion cement, and the micro-expansion cement can simultaneously achieve the effect of reinforcing the shield body.
2. The invention carries out shell abandoning and dismantling disassembly construction in the tunnel, directly pulls out the tunnel after the rear matching trolley is disconnected, detaches and cuts off all parts of the assembling machine, the walking beam, the H frame, the motor, the man cabin, the propulsion oil cylinder, the stone crusher, the cutter head and the main bearing, then carries out the tunnel in blocks, keeps the abandoned shield shell in situ, abandons the shield shell and then carries out secondary lining in the shield shell as permanent support, and is reliable and stable and has good use effect.
3. The method has simple steps, necessary reconstruction and adjustment are carried out on the formed transportation system and pipeline arrangement of the shield tunnel, the vertical transportation system configured in the shield method construction can basically meet the construction requirements of the mine method, various supporting equipment and facilities are arranged on the ground and can be used for the mine method construction, shield tunnel protection measures are added, a ring beam is constructed at the transition section, the safety of the section is ensured, necessary conditions are provided for the mine method construction, the mine method construction is realized in the shield tunnel, the problem that the shield cannot be driven due to an accident condition and the mine method is required to be adopted for continuous construction is solved, or the difficulty of the mine method tunnel construction is increased, the problem that a working surface is required to be newly arranged in the shield tunnel is solved, and the smooth penetration of the section tunnel is ensured.
4. The invention adopts the mine method and the shield method to construct the interval tunnel engineering in sections, widens the application range of the underground excavation method, ensures the smooth penetration of the interval, provides a new method and thought for the construction selection aiming at the complicated interval tunnel engineering, and fully utilizes various facilities and equipment in the original shield method construction during the mine method construction, thereby reducing the investment and the construction cost.
In summary, after the shield tunnel construction is completed, the shield machine is disassembled by removing the shell in the tunnel, the shield machine is transported out after being disassembled, the formed shield tunnel transportation system and the pipeline arrangement are reconstructed and adjusted, shield tunnel protection measures are added, and a ring beam is applied at the transition section, so that the safety of the section is ensured, necessary conditions are provided for the mine construction, the mine construction is realized in the shield tunnel, the problem that the shield cannot be driven due to an accident condition and the mine construction needs to be continued is solved, or the difficulty of the mine construction tunnel construction is increased, and a working surface needs to be newly arranged in the shield tunnel, so that the section tunnel is ensured to be smoothly communicated, and the popularization and the use are convenient.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of reinforcing a shield shell after the shield machine abandons and detaches the shield machine.
FIG. 2 is a schematic structural view of the horizontal road construction of the present invention.
Fig. 3 is a schematic diagram of the positional relationship among the mine tunnel, the shield tunnel, and the shield starting station according to the present invention.
Fig. 4 is a schematic view of the installation of the protective door curtain and the segment protective layer of the present invention on a shield tunnel.
FIG. 5 is a schematic view of the installation of the protective door curtain and the tube ring of the present invention.
FIG. 6 is a schematic diagram showing the positional relationship among the shield shell, the pipe ring, the ring beam, the extension lining and the secondary lining according to the present invention.
FIG. 7 is a schematic view of the installation relationship of the ring beam, the embedded steel plate and the pipe ring.
FIG. 8 is a block diagram of a method flow of the method of the present invention.
Description of reference numerals:
1-a rock formation; 2-shield shell; 3, plugging a steel plate;
4-pipe ring; 5, tensioning the tube plate; 6, plugging reinforcing ribs;
7-moulding concrete; 8-linking the reinforcing steel bars; 9-concrete protective layer;
10-a ballast bed; 11-mine method tunnel; 12-shield tunnel;
13-shield origin station; 14-protective door curtain; 15-suspension bolts;
16-a segment protection layer; 17-ring beam; 18-extending the lining;
19, secondary lining; 20, pre-burying a steel plate; 21-anchoring ribs.
Detailed Description
As shown in fig. 1 to 8, the method for reconstructing the shield tunnel to perform the mining method construction of the present invention includes the following steps:
firstly, construction preparation, namely reinforcing the rock stratum 1 around the shield tunneling machine after the shield tunneling tunnel 12 is constructed in place, and performing waterproof treatment, wherein the process comprises the following steps:
step 101, filling grease into a shield tail by using a shield machine to protect a shield tail brush;
102, after the shield tunnel 12 is constructed in place, performing ring sealing grouting on the last 10 ring pipe rings 4 of the shield tunnel construction, performing grouting construction by adopting double grout, and symmetrically injecting the grouting from bottom to top by using pipe pieces to reserve secondary grouting holes, wherein the grouting pressure is 0.3-0.4 bar; the grouting pressure and the duct piece are monitored in the grouting process, so that the duct piece is prevented from cracking or dislocation;
103, tensioning the last 10 ring pipe rings 4 constructed by the shield method by using tensioning steel plates 5, wherein 6-8 tensioning steel plates 5 are arranged in the last 10 ring pipe rings 4 constructed by the shield method in the longitudinal direction, so that loose discharging force of the perforated segments is prevented;
104, arranging a bearing steel plate and an arc-shaped steel plate on the last annular pipe ring 4 constructed by the shield method, welding and plugging the bearing steel plate and the shield tail of the shield shell 2, fixedly welding the pre-buried steel plate, the arc-shaped steel plate and the shield shell 2 in the last annular pipe ring 4 constructed by the shield method through a plugging reinforcing rib 6, and injecting micro-expansion cement through a segment grouting hole to fill a gap between a segment and the shield tail of the shield shell 2;
in this embodiment, the micro-expansive cement in step 104 is AEC micro-expansive cement, and the hydraulic cementing material for compensating the shrinkage performance of the concrete has good crack resistance, good permeability resistance, low alkali, low hydration heat, high strength performance, good adhesion performance, good corrosion resistance, micro-expansion, and compensation shrinkage.
105, arranging a plugging steel plate 3 at the shield head of the shield shell 2, plugging a gap between the shield head of the shield shell 2 and surrounding rocks, and injecting micro-expansion cement into a radial grouting hole of the middle shield for filling to plug formation water around a shield body;
106, arranging an air-extracting smoke exhaust fan at the front side of the tunnel excavation surface to form convection with an original air supply fan in the tunnel, accelerating air circulation of a working surface and ensuring that smoke and dust in the tunnel are quickly exhausted;
it should be noted that, the shield machine peripheral rock stratum is reinforced after the shield method tunnel construction is in place through construction preparation, waterproof treatment is carried out, the shield machine tail segment is strictly blocked by underground water through micro-expansion cement, the micro-expansion cement can simultaneously achieve the effect of reinforcing the shield body, in addition, a smoke exhaust fan for exhausting air and an original air supply fan in the tunnel are arranged on the front side of the tunnel excavation face to form convection, the air circulation of the working face is accelerated, the rapid discharge of smoke and dust in the tunnel is ensured, and a good construction environment is ensured.
Step two, removing the shell of the shield tunneling machine: according to the sequence of a rear matching trolley, an assembling machine, a walking beam, an H frame, a motor, a man bin, a propulsion oil cylinder, a stone crusher, a cutter head and a main bearing, shell removing and disassembling construction is carried out in a hole, the rear matching trolley is disconnected and then directly pulled out of the tunnel, the assembling machine, the walking beam, the H frame, the motor, the man bin, the propulsion oil cylinder, the stone crusher, the cutter head and the main bearing are disassembled, cut off and then are transported out of the tunnel in blocks, and a discarded shield shell 2 is reserved in situ;
it should be noted that the construction of shell abandoning and dismantling is carried out in the tunnel, the tunnel is directly pulled out after the rear matching trolley is disconnected, the assembling machine, the walking beam, the H frame, the motor, the man-made cabin, the propulsion oil cylinder, the stone crusher, the cutter head and the main bearing are disassembled, cut off and then are transported out of the tunnel in blocks, the abandoned shield shell is reserved in situ, and the abandoned shield shell is subsequently constructed into a secondary lining in the shield shell as a permanent support, so that the construction is reliable and stable, and the using effect is good.
Step three, horizontal road construction: firstly, laying mold concrete 7 on a pipe ring 4 of a shield tunnel 12, wherein the maximum thickness of the mold concrete 7 is 500-700 mm, and pre-burying a single-layer reinforcing mesh and a connecting reinforcing bar 8 in the mold concrete 7; laying a concrete protective layer 9 for protecting the single-layer reinforcing mesh on the molded concrete 7, wherein the connecting reinforcing steel bars 8 are kept vertical; then pouring the ballast bed 10;
in this embodiment, carry out the pipeline adjustment in the construction of level road in the third step simultaneously, it is required until satisfying the construction of mine method, the pipeline includes ventilation pipe, delivery pipe, blow off pipe, high tension cable, illumination line, communication line, guidance tape pipeline and transformer pipeline, sets up the platform through the bolt after dismantling transformer pipeline from the shield structure machine and installs on the section of jurisdiction lateral wall.
It should be noted that the formed shield tunnel transportation system and the pipeline arrangement are reconstructed and adjusted as necessary, the vertical transportation system configured for the shield construction can basically meet the requirements of the mine construction, various supporting equipment and facilities are arranged on the ground to be used for the mine construction, the ventilation pipe, the water supply pipe, the sewage discharge pipe, the high-voltage cable, the lighting line, the communication line and the walkway plate pipeline basically meet the requirements of the mine construction, the adjustment is small, and various pipeline hooks can be used for the shield construction when the pipeline is laid additionally.
Step four, protecting the tunnel by the shield method and excavating the transition section of the tunnel by the mine method: the transition section of the mine method tunnel 11 is excavated by blasting, before the transition section of the mine method tunnel 11 is excavated by blasting, a plurality of suspension bolts 15 for suspending a protective door curtain 14 are installed on the end surface of the last annular pipe ring 4 constructed by the shield method, the suspension bolts 15 penetrate into bolt holes on the side surface of the last annular pipe ring 4 constructed by the shield method, the suspension bolts 15 are used as door curtain suspension points, and the protective door curtain 14 is made of a steel wire rope net;
in the embodiment, the number of the suspension bolts 15 in the fourth step is 8-10, and the 8-10 suspension bolts 15 are uniformly arranged on the end face of the last annular pipe ring 4 constructed by the shield method.
In this embodiment, the mesh diameter of the steel wire rope net in the fourth step is 100mm to 200 mm.
Then covering a segment protection layer 16 on the last 3-5 rings of pipe rings 4 constructed by the shield method, wherein the segment protection layer 16 comprises a wood plate bottom layer and a cotton layer protection layer laid on the wood plate bottom layer;
it should be noted that, the transition section of the mine method tunnel 11 is excavated by blasting, the flying stone phenomenon cannot be avoided, the protective door curtain 14 is arranged to block the flying stones, so that the duct pieces are prevented from being broken by the flying stones, when the dregs are transported, one side of the protective door curtain 14 is untied to be connected, the steel wire rope net is collected on one side, and the convenience is brought to the passage of personnel and vehicles.
In the construction process of the transition section of the mine tunnel 11, a transport vehicle is backed from the shield initial station 13 into an excavation surface and is driven out in the forward direction, and the shield initial station 13 is used as a vehicle turning and equipment temporary storage area to output the muck generated in the transition section of the mine tunnel 11;
the length of the transition section of the mine tunnel 11 is 30-50 m;
step five, forming the transition section of the mine tunnel, wherein the process is as follows:
501, arranging a ring beam 17 at one end, close to a mine method tunnel 11, of the last ring pipe ring 4 constructed by a shield method, wherein the ring beam 17 is of a reinforced concrete structure, reinforcing steel bars of the ring beam 17 are fixedly connected with an embedded steel plate 20 and a blocking reinforcing rib 6 which are embedded in the last ring pipe ring 4 constructed by the shield method, one end of the ring beam 17 exceeds the outside of the pipe ring 4 and is fixedly connected with a shield shell 2, and the other end of the ring beam 17 extends into the pipe ring 4 by 10 cm;
in this embodiment, the embedded steel plate 20 in step 501 is disposed in the last annular pipe ring 4 through the anchoring rib 21.
Step 502, performing chiseling treatment in a construction joint between the ring beam 17 and the last annular pipe ring 4 constructed by the shield method, and arranging a water-swelling water stop strip and a grouting pipe;
503, performing secondary lining construction on the transition section of the mine-method tunnel 11, constructing a secondary lining 19 of the transition section of the mine-method tunnel 11, synchronously pouring concrete of a ring beam 17 and the secondary lining 19, simultaneously performing extension lining construction on one side of the ring beam 17 far away from the transition section of the mine-method tunnel 11, constructing an extension lining 18 of the transition section of the mine-method tunnel 11, extending the extension lining 18 into a pipe ring 4 of the last 3-5 rings of shield construction, and additionally performing shield tail grouting filling on a gap between the shield shell 2 and the pipe ring 4 to integrate the secondary lining 19, the ring beam 17, the extension lining 18, the pipe ring 4 and the shield shell 2;
sixthly, constructing the tunnel by a mining method: the mining method tunnel 11 is excavated by blasting, and in the construction process of the mining method tunnel 11, the transport vehicles output the newly generated dregs of the mining method tunnel 11 by using the mining method tunnel 11 as a vehicle turning and equipment storage area.
When the method is used, shield tunnel protection measures are added, a ring beam is constructed at the transition section, the safety of the section is ensured, and necessary conditions are provided for the mine method construction, so that the mine method construction is realized in the shield tunnel, the problem that the shield cannot be driven due to an accident condition and the mine method is required to be adopted for continuous construction is solved, or the mine method tunnel construction difficulty is increased, and a working surface is required to be newly arranged in the shield tunnel, so that the section tunnel is ensured to be smoothly communicated.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A method for reconstructing a shield tunnel to carry out mine construction is characterized by comprising the following steps:
firstly, construction preparation, namely reinforcing the rock stratum (1) around the shield tunneling machine after the shield tunneling machine tunnel (12) is constructed in place, and performing waterproof treatment, wherein the process comprises the following steps:
step 101, filling grease into a shield tail by using a shield machine to protect a shield tail brush;
102, after the shield tunnel (12) is constructed in place, performing ring sealing grouting on the last 10 ring pipe rings (4) of the shield tunnel construction, performing grouting construction by adopting double grout, and symmetrically injecting the grouting from bottom to top by adopting pipe piece reserved secondary grouting holes, wherein the grouting pressure is 0.3-0.4 bar; the grouting pressure and the duct piece are monitored in the grouting process, so that the duct piece is prevented from cracking or dislocation;
103, tensioning the last 10 ring pipe rings (4) constructed by the shield method by using tensioning steel plates (5), wherein 6-8 tensioning steel plates (5) are arranged in the last 10 ring pipe rings (4) constructed by the shield method in the longitudinal direction, so that loose discharging force of the perforated pipe pieces is prevented;
104, arranging a bearing steel plate and an arc-shaped steel plate on the last annular pipe ring (4) constructed by the shield method, welding and plugging the bearing steel plate and the tail of the shield shell (2), fixedly welding a pre-buried steel plate, the arc-shaped steel plate and the shield shell (2) in the last annular pipe ring (4) constructed by the shield method through plugging reinforcing ribs (6), and injecting micro-expansion cement through a pipe piece grouting hole to fill a gap between a pipe piece and the tail of the shield shell (2);
105, arranging a plugging steel plate (3) at the shield head of the shield shell (2), plugging a gap between the shield head of the shield shell (2) and the surrounding rock, and injecting micro-expansion cement into radial grouting holes of the middle shield for filling to plug formation water around the shield body;
106, arranging an air-extracting smoke exhaust fan at the front side of the tunnel excavation surface to form convection with an original air supply fan in the tunnel, accelerating air circulation of a working surface and ensuring that smoke and dust in the tunnel are quickly exhausted;
step two, removing the shell of the shield tunneling machine: according to the sequence of a rear matching trolley, an assembling machine, a walking beam, an H frame, a motor, a man bin, a propulsion oil cylinder, a stone crusher, a cutter head and a main bearing, shell abandoning and disassembling construction is carried out in a hole, the rear matching trolley is disconnected and then directly pulled out of the tunnel, the assembling machine, the walking beam, the H frame, the motor, the man bin, the propulsion oil cylinder, the stone crusher, the cutter head and the main bearing are disassembled and cut off and then are transported out of the tunnel in blocks, and a abandoned shield shell (2) is reserved in situ;
step three, horizontal road construction: firstly, laying mold concrete (7) on a pipe ring (4) of a shield tunnel (12), wherein the maximum thickness of the mold concrete (7) is 500-700 mm, and pre-burying a single-layer reinforcing mesh and a connecting reinforcing steel bar (8) in the mold concrete (7); laying a concrete protective layer (9) for protecting the single-layer reinforcing mesh on the molded concrete (7), wherein the connecting reinforcing steel bars (8) are kept vertical; then pouring a ballast bed (10);
step four, protecting the tunnel by the shield method and excavating the transition section of the tunnel by the mine method: the method comprises the steps that blasting is adopted for excavation of a transition section of a mine method tunnel (11), a plurality of suspension bolts (15) used for suspending a protective door curtain (14) are installed on the end face of the last annular pipe ring (4) constructed by a shield method before blasting excavation of the transition section of the mine method tunnel (11), the suspension bolts (15) penetrate through bolt holes in the side face of the last annular pipe ring (4) constructed by the shield method, the suspension bolts (15) are used as door curtain suspension points, and the protective door curtain (14) is made of a steel wire rope net;
then covering a segment protection layer (16) on the last 3-5 rings of pipe rings (4) constructed by the shield method, wherein the segment protection layer (16) comprises a wood board bottom layer and a cotton layer protection layer laid on the wood board bottom layer;
in the construction process of the transition section of the mine tunnel (11), a transport vehicle is overturned from a shield initial station (13) to enter an excavation surface and is driven out in the forward direction, and the shield initial station (13) is used as a vehicle turning and equipment temporary storage area to output the muck generated in the transition section of the mine tunnel (11);
the length of the transition section of the mine tunnel (11) is 30-50 m;
step five, forming the transition section of the mine tunnel, wherein the process is as follows:
501, arranging a ring beam (17) at one end, close to a mine method tunnel (11), of the last ring pipe ring (4) constructed by a shield method, wherein the ring beam (17) is of a reinforced concrete structure, reinforcing steel bars of the ring beam (17) are fixedly connected with an embedded steel plate (20) and a plugging reinforcing rib (6) which are embedded in the last ring pipe ring (4) constructed by the shield method, one end of the ring beam (17) exceeds the outside of the pipe ring (4) and is fixedly connected with a shield shell (2), and the other end of the ring beam (17) extends into the pipe ring (4) by 10 cm;
step 502, performing chiseling treatment in a construction joint between the ring beam (17) and the last annular pipe ring (4) constructed by the shield method, and arranging a water-swelling water stop strip and a grouting pipe;
503, carrying out secondary lining construction on a transition section of the mine-method tunnel (11), constructing a secondary lining (19) of the transition section of the mine-method tunnel (11), synchronously pouring concrete of a ring beam (17) and concrete of the secondary lining (19), simultaneously carrying out extension lining construction on one side of the ring beam (17) far away from the transition section of the mine-method tunnel (11), constructing an extension lining (18) of the transition section of the mine-method tunnel (11), extending the extension lining (18) into a pipe ring (4) of the last 3-5 rings of shield construction, and carrying out shield tail grouting filling on a gap between a shield shell (2) and the pipe ring (4) to integrate the secondary lining (19), the ring beam (17), the extension lining (18), the pipe ring (4) and the shield shell (2);
sixthly, constructing the tunnel by a mining method: the mine method tunnel (11) is excavated by blasting, and in the construction process of the mine method tunnel (11), the transport vehicle utilizes the mine method tunnel (11) as a vehicle turning and equipment storage area to output the newly generated muck of the mine method tunnel (11).
2. The method for reconstructing the shield tunnel to carry out the mine construction according to claim 1, wherein: in the step 501, the embedded steel plate (20) is arranged in the last annular pipe ring (4) through the anchoring ribs (21).
3. The method for reconstructing the shield tunnel to carry out the mine construction according to claim 1, wherein: and (3) adjusting pipelines while constructing the horizontal road in the third step until the construction requirements of a mine method are met, wherein the pipelines comprise ventilation pipes, water supply pipes, blow-off pipes, high-voltage cables, lighting lines, communication lines, walkway plate pipelines and transformer pipelines, and the transformer pipelines are disassembled from the shield tunneling machine and then are installed on the side wall of the duct piece through a bolt erection platform.
4. The method for reconstructing the shield tunnel to carry out the mine construction according to claim 1, wherein: in the fourth step, the mesh diameter of the steel wire rope net is 100 mm-200 mm.
5. The method for reconstructing the shield tunnel to carry out the mine construction according to claim 1, wherein: the number of the suspension bolts (15) in the fourth step is 8-10, and the 8-10 suspension bolts (15) are uniformly arranged on the end face of the last annular pipe ring (4) constructed by the shield method.
6. The method for reconstructing the shield tunnel to carry out the mine construction according to claim 1, wherein: in step 104, the micro-expansive cement is AEC micro-expansive cement.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911291697.1A CN110985025B (en) | 2019-12-16 | 2019-12-16 | Method for reconstructing shield tunnel to carry out mine construction |
| PCT/CN2020/130990 WO2021120991A1 (en) | 2019-12-16 | 2020-11-24 | Method for reconstructing shield tunnel for mining construction |
| SG11202111608VA SG11202111608VA (en) | 2019-12-16 | 2020-11-24 | Method for reconstructing shield tunnel for mining construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911291697.1A CN110985025B (en) | 2019-12-16 | 2019-12-16 | Method for reconstructing shield tunnel to carry out mine construction |
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| Publication Number | Publication Date |
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| CN110985025A CN110985025A (en) | 2020-04-10 |
| CN110985025B true CN110985025B (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911291697.1A Active CN110985025B (en) | 2019-12-16 | 2019-12-16 | Method for reconstructing shield tunnel to carry out mine construction |
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| Country | Link |
|---|---|
| CN (1) | CN110985025B (en) |
| SG (1) | SG11202111608VA (en) |
| WO (1) | WO2021120991A1 (en) |
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| CN110985025B (en) * | 2019-12-16 | 2021-01-26 | 中铁一局集团有限公司 | Method for reconstructing shield tunnel to carry out mine construction |
| CN112832785B (en) * | 2021-02-24 | 2024-05-24 | 中铁第六勘察设计院集团有限公司 | Shield mine combined construction method tunnel submarine docking method and miniature dismounting machine cavity |
| CN113464175A (en) * | 2021-07-15 | 2021-10-01 | 北京市市政工程设计研究总院有限公司 | Air bag type water stop sealing device for shield tunnel portal and construction method |
| CN113464168B (en) * | 2021-07-29 | 2022-07-19 | 中铁一局集团(广州)建设工程有限公司 | Construction method for preventing and controlling water seepage on surface of secondary lining of tunnel |
| CN113586146A (en) * | 2021-08-05 | 2021-11-02 | 上海市政工程设计研究总院（集团）有限公司 | Gas pressure protection device, ventilation deodorization system and deep drainage tunnel |
| CN113685192B (en) * | 2021-08-20 | 2024-06-25 | 上海市城市建设设计研究总院（集团）有限公司 | Connection node of ramp in and out main line shield tunnel and construction method |
| CN113622930B (en) * | 2021-09-10 | 2024-02-20 | 上海市机械施工集团有限公司 | Slurry balance shield tunnel entering and exiting construction method |
| CN113742868B (en) * | 2021-09-27 | 2024-05-03 | 中铁十四局集团隧道工程有限公司 | Method for determining optimal initial direction of shield of small-radius curve tunnel |
| CN113833480B (en) * | 2021-09-29 | 2024-05-24 | 成都建工第九建筑工程有限公司 | Construction method for initial tunneling and arrival of shield |
| CN113944475A (en) * | 2021-10-23 | 2022-01-18 | 中电建十一局工程有限公司 | Large-size rectangular pipe jacking construction method for stratum with upper soft layer and lower hard layer |
| CN114263469B (en) * | 2021-11-10 | 2023-11-14 | 中铁二局集团有限公司 | TBM or shield tunneling machine rapid jacking system and construction method |
| CN114151093B (en) * | 2021-11-12 | 2024-06-18 | 中铁隧道局集团有限公司 | Construction method for shield to continuously push through vertical shaft in empty mode and initiate in secondary mode |
| CN114370286B (en) * | 2021-12-08 | 2024-06-04 | 上海市基础工程集团有限公司 | Safety hole entering method of shield machine for open caisson structure |
| CN114320339A (en) * | 2021-12-20 | 2022-04-12 | 攀钢集团工程技术有限公司 | Buffering damping device for preventing blasting damage of tunnel portal |
| CN114810124A (en) * | 2022-03-14 | 2022-07-29 | 中铁第四勘察设计院集团有限公司 | Connecting structure for combined tunnel lining structure |
| CN114611243B (en) * | 2022-03-14 | 2023-09-08 | 华中科技大学 | Construction method of shield general segment point location selection model and point location selection method |
| CN115142870A (en) * | 2022-03-14 | 2022-10-04 | 中铁第四勘察设计院集团有限公司 | Construction structure of segment lining and composite lining |
| CN114876474B (en) * | 2022-05-26 | 2024-04-30 | 中铁第一勘察设计院集团有限公司 | Construction method for expanding and excavating shield well structure by mine method |
| CN115218735B (en) * | 2022-07-26 | 2023-06-16 | 广东爆破工程有限公司 | Method for solving problem of getting stuck due to eccentric wear of cutter |
| CN115306412A (en) * | 2022-08-09 | 2022-11-08 | 中铁隧道局集团有限公司 | Method for integrally transferring rear matched trailer of shield tunneling machine in tunnel |
| CN116045077B (en) * | 2023-02-16 | 2024-04-26 | 中交一公局集团有限公司 | Large-diameter direct-buried pipeline installation method |
| CN116145729B (en) * | 2023-04-23 | 2023-07-28 | 北京城建设计发展集团股份有限公司 | Subway layered station structure in sea-land connection area and construction method thereof |
| CN117540480B (en) * | 2024-01-08 | 2024-04-19 | 中铁南方投资集团有限公司 | Method for calculating stress deformation of tunnel lining structure under shield attitude adjustment |
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| CN102322027A (en) * | 2011-06-28 | 2012-01-18 | 广州轨道交通建设监理有限公司 | A kind of method that adopts the Mine Method expansion to dig shield tunnel construction subway station |
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| CN110985025B (en) * | 2019-12-16 | 2021-01-26 | 中铁一局集团有限公司 | Method for reconstructing shield tunnel to carry out mine construction |
-
2019
- 2019-12-16 CN CN201911291697.1A patent/CN110985025B/en active Active
-
2020
- 2020-11-24 SG SG11202111608VA patent/SG11202111608VA/en unknown
- 2020-11-24 WO PCT/CN2020/130990 patent/WO2021120991A1/en active Application Filing
Also Published As
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| SG11202111608VA (en) | 2021-11-29 |
| CN110985025A (en) | 2020-04-10 |
| WO2021120991A1 (en) | 2021-06-24 |
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