CN116163761A - Quick switching structure and quick switching excavation method for tunnel in underground tunnel - Google Patents
Quick switching structure and quick switching excavation method for tunnel in underground tunnel Download PDFInfo
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- CN116163761A CN116163761A CN202310356777.0A CN202310356777A CN116163761A CN 116163761 A CN116163761 A CN 116163761A CN 202310356777 A CN202310356777 A CN 202310356777A CN 116163761 A CN116163761 A CN 116163761A
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- 238000000034 method Methods 0.000 title claims abstract description 174
- 238000009412 basement excavation Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 51
- 239000010959 steel Substances 0.000 claims description 51
- 230000008569 process Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 239000011378 shotcrete Substances 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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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
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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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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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
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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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
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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
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a rapid conversion structure of a middle tunnel method of a subsurface tunnel, which comprises a double-side-wall pilot tunnel method tunnel, a middle tunnel method tunnel and a temporary transverse channel, wherein the double-side-wall pilot tunnel method tunnel is communicated with the middle tunnel method tunnel through the temporary transverse channel, when the subsurface tunnel is formed, the double-side-wall pilot tunnel method and the middle tunnel method are converted through the temporary transverse channel, and the temporary transverse channel is arranged between a guide hole (1) of the double-side-wall pilot tunnel method tunnel, a guide hole (2) of the double-side-wall pilot tunnel and the middle pilot tunnel of the middle tunnel method tunnel. According to the method, the temporary construction channel is additionally arranged, the middle-hole method section tunnel is excavated in advance before the construction of the double-side-wall pilot pit method section tunnel is finished, the influence of procedure conversion on the construction period is reduced, the construction period is saved, and the purpose of safe and orderly construction of the tunnel is ensured. The invention also discloses a method for quickly switching the excavation of the tunnel in the underground excavation tunnel.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a rapid switching structure and a rapid switching excavation method for a tunnel in a subsurface tunnel.
Background
When the subway large-section tunnel adopts a double-side-wall pilot tunnel normal middle-hole method to convert the construction process, the support structure of the variable section is complex in stress, more construction procedures are crossed, the construction progress is slow, the construction efficiency is limited, the tunnel excavation construction efficiency cannot be improved, and the purpose of safe and rapid construction is achieved.
2011-08-17 with the patent number of CN201110100807 discloses a subway tunnel excavation construction method, wherein a tunnel to be excavated comprises a first normal tunnel conventional section, a first normal tunnel expansion section, a second normal tunnel conventional section, a second normal tunnel expansion section and a crossover tunnel section, wherein the first normal tunnel conventional section or the second normal tunnel conventional section only accommodates a first normal line or a second normal line of a single line and is a single-hole single-line tunnel; the first positive line tunnel expansion section is required to accommodate a first positive line, a parking line, a crossover line connecting the first positive line and the parking line and a crossover line connecting the second positive line and the parking line, and the tunnel section is gradually expanded from a minimum section to a maximum section tunnel section; the second positive line tunnel expansion section is required to accommodate a second positive line and a crossover line connecting the second positive line and a stop line, and gradually expands from a minimum section to a maximum section tunnel section; the crossover tunnel section needs to accommodate a crossover connecting the second positive line and the park line. The method comprises the steps of firstly excavating a tunnel section with the largest section, and then transiting from the large section to the smaller section from the tunnel section with the largest section, so that the underground section tunnel with the transition line and the stop line is excavated in a large-small-shrinkage section mode. The above technical problems still cannot be solved.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a quick conversion structure and a quick conversion excavation method for a middle hole method of a hidden tunnel, which are simple in structure and convenient to operate.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a quick conversion structure of hole method in undercut tunnel, includes double side wall pilot tunnel method tunnel, well hole method tunnel and interim transverse channel, communicates through interim transverse channel between double side wall pilot tunnel method tunnel and the well hole method tunnel, and when undercut tunnel, double side wall pilot tunnel method and well hole method change through interim transverse channel, and interim transverse channel sets up between the pilot tunnel of (1) of double side wall pilot tunnel method tunnel, (2) pilot tunnel and well pilot tunnel of well hole method tunnel.
Further, the temporary transverse channel comprises an upper channel and a lower channel, wherein the upper channel is positioned above the lower channel, and the upper channel is constructed first and then the lower channel is constructed.
Further, the temporary transverse channel further comprises a middle support, and one end of the middle support is placed on the transverse support between the guide hole (1) and the guide hole (2) in the double-side-wall guide pit method tunnel.
Further, the tunnel with the double-side-wall pilot tunnel method comprises a pilot hole (1), a pilot hole (2), a pilot hole (3), a pilot hole (4), a pilot hole (5), a pilot hole (6), a pilot hole (1), a pilot hole (3), a pilot hole (5) which are respectively positioned above the pilot hole (2), the pilot hole (4) and the pilot hole (6), a transverse support is arranged between the upper pilot hole and the lower pilot hole, and a vertical support is arranged between the left pilot hole and the right pilot hole.
Further, at the interface of the double-side-wall pilot tunnel method tunnel and the middle-hole method tunnel, the vertical support of the pilot tunnel number (1) of the double-side-wall pilot tunnel method tunnel is broken, the upper-layer channel of the temporary transverse channel is constructed, the vertical support of the pilot tunnel number (2) is broken, and the lower-layer channel of the temporary transverse channel is constructed.
Further, the middle tunnel method tunnel comprises a middle pilot tunnel, a left pilot tunnel and a right pilot tunnel, wherein the middle pilot tunnel is positioned between the left pilot tunnel and the right pilot tunnel, enters the middle pilot tunnel of the middle tunnel method tunnel from the temporary transverse channel, and then enters the left pilot tunnel and the right pilot tunnel from the middle pilot tunnel.
Further, a first steel frame, a second steel frame and a third steel frame are arranged in the middle pilot tunnel of the middle tunnel method tunnel, the third steel frames are sequentially arranged and gradually lifted to be in a vault from the first steel frames, and the third steel frames are in contact with the vault of the middle pilot tunnel.
Based on the rapid conversion structure of the hole-in-underground tunnel method, the invention also provides a rapid conversion excavation method of the hole-in-underground tunnel method, which comprises the following steps:
and 5, excavating other residual pilot tunnels of the double-side-wall pilot tunnel method to the temporary passage to perform temporary passage partition wall rupture and end plugging construction.
Further, the process of constructing the temporary transverse channel in the step 2 is as follows: when the tunnel is excavated, firstly constructing an upper layer passage of the temporary transverse passage, densely arranging double annular steel frames at two sides of the passage, and plugging a tunnel face by adopting I-steel after the upper layer passage is excavated to a designed length; after the upper layer channel is completely constructed, breaking the vertical support of the guide hole (2), constructing the lower layer channel, digging the lower layer channel to a designed mileage, and sealing the end of the tunnel face by adopting an I-shaped steel frame and shotcrete; when the height of the temporary transverse channel is higher, a middle support needs to be arranged, and the temporary transverse channel middle support is arranged on the transverse support between the pilot tunnel (1) and the pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel.
Further, the process of breaking the temporary transverse channel in the step 3 is as follows: firstly, breaking an upper layer channel of the temporary transverse channel to a reserved core soil position; and (3) temporarily closing the face by a guide hole feeding ruler 3-5 m in the middle of the middle guide hole method, then performing the breaking work of the lower layer channel of the temporary transverse channel, and performing the excavation work of the lower half section of the guide hole in the middle hole method after the breaking work, wherein the primary support grid is timely closed into a ring.
The technical scheme of the invention has the advantages that:
1. according to the method, the temporary construction channel is additionally arranged by adjusting the guide hole excavation footage distance, the middle-hole method section tunnel is excavated in advance before the construction of the double-side-wall guide pit method section tunnel is finished, the influence of procedure conversion on the construction period is reduced, the construction period is saved, and the purpose of safe and orderly construction of the tunnel is ensured. .
2. The pilot tunnel primary support and the double-side wall pilot pit method can simultaneously and alternately operate, the working procedure conversion is less, the construction is safe and reliable, the excavation working face is increased, the total construction period is saved, and the quick conversion excavation method of the pilot tunnel method is also applicable to large-section mine tunnel engineering like roads, railways and the like.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic illustration of a double sidewall pilot pit method construction;
FIG. 2 is a schematic elevational view of a temporary transverse channel according to the present invention;
FIG. 3 is a schematic three-dimensional view of a temporary transverse channel according to the present invention;
FIG. 4 is a schematic illustration of a temporary lateral approach hole-entering construction of the present invention;
FIG. 5 is a three-dimensional schematic diagram of a temporary lateral approach hole-entering construction of the present invention;
FIG. 6 is a schematic diagram of a tunnel construction according to the present invention.
The labels in the above figures are respectively: 1. the vertical support of the guide hole (1); 2. a transverse support; 3. (2) vertical support of the guide hole number; 4. an upper layer channel; 5. a lower layer channel; 6. a double-side-wall pilot tunnel bottom plate; 7. double side wall pilot tunnel dome; 8. temporary lateral passage; 9. double-side-wall pilot tunnel method tunnel; 10. a middle hole tunnel; 11. reserving core soil; 12. a lower half section of the pilot tunnel in the middle-hole method; 13. the first truss steel frame; 14. the third steel frame; 15. a middle pilot tunnel; 16. a left pilot hole; 17. a right pilot hole; 18. and the second steel frame.
Detailed Description
In the present invention, it is to be understood that the term "length"; "width"; "go up"; "Down"; "front"; "rear"; "left"; "right"; "vertical"; "horizontal"; "roof"; "bottom", "inner"; "outside"; "clockwise"; "counterclockwise"; "axial"; "planar orientation"; the orientation or positional relationship indicated by "circumferential" or the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and simplification of description, and is not indicative or implying that the apparatus or element to be referred to must have a specific orientation; constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.
As shown in fig. 1 to 6, a fast switching structure of a tunnel method in a subsurface tunnel comprises a double-side-wall pilot tunnel method tunnel 9, a tunnel method tunnel 10 and a temporary transverse channel 8, wherein the double-side-wall pilot tunnel method tunnel 9 and the tunnel method tunnel 10 are communicated through the temporary transverse channel 8, and when the tunnel is in subsurface, the double-side-wall pilot tunnel method and the tunnel method are switched through the temporary transverse channel 8, and the temporary transverse channel 8 is arranged between a pilot tunnel (1) of the double-side-wall pilot tunnel method tunnel 9, a pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel 10 and the middle pilot tunnel of the tunnel method tunnel 10. One side of the temporary transverse channel 8 is communicated with a pilot tunnel (1) and a pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel 9, and the other side of the temporary transverse channel 8 is communicated with a middle pilot tunnel of the middle-hole method tunnel 10. According to the method, the temporary construction channel is additionally arranged, the middle-hole method section tunnel is excavated in advance before the construction of the double-side-wall pilot pit method section tunnel is finished, the influence of procedure conversion on the construction period is reduced, the construction period is saved, and the purpose of safe and orderly construction of the tunnel is ensured.
The temporary transverse channel 8 comprises an upper channel 4 and a lower channel 5, wherein the upper channel 4 is positioned above the lower channel 5, and the upper channel 4 is constructed first and then the lower channel 5 is constructed. When the height of the temporary transverse channel 8 is higher, a middle support is required to be arranged for increasing the structural strength, the temporary transverse channel 8 further comprises the middle support, and one end of the middle support is placed on the transverse support 2 between the guide holes (1) and (2) in the double-side-wall guide pit method tunnel 9.
The double-side-wall pilot tunnel method tunnel 9 comprises a pilot hole (1), a pilot hole (2), a pilot hole (3), a pilot hole (4), a pilot hole (5), a pilot hole (6), a pilot hole (1), a pilot hole (3), a pilot hole (5) which are respectively positioned above the pilot hole (2), the pilot hole (4) and the pilot hole (6), a transverse support (2) is arranged between the upper pilot hole and the lower pilot hole, and a vertical support is arranged between the left pilot hole and the right pilot hole. And (3) breaking the vertical support 1 of the pilot tunnel of the double-side-wall pilot tunnel method tunnel (1), constructing the upper layer channel 4 of the temporary transverse channel 8, breaking the vertical support 3 of the pilot tunnel of the (2), and constructing the lower layer channel 5 of the temporary transverse channel 8 at the interface of the double-side-wall pilot tunnel method tunnel 9 and the middle-hole tunnel 10.
The middle tunnel method tunnel 10 comprises a middle pilot tunnel 15, a left pilot tunnel 16 and a right pilot tunnel 17, wherein the middle pilot tunnel 15 is positioned between the left pilot tunnel 16 and the right pilot tunnel 17, enters the middle pilot tunnel 15 of the middle tunnel method tunnel 10 from the temporary transverse channel 8, and then enters the left pilot tunnel 16 and the right pilot tunnel 17 of the middle pilot tunnel 15. The middle pilot tunnel 15 of the middle tunnel method tunnel 10 is provided with a first steel frame 13, a second steel frame 18 and a third steel frame 14, the three steel frames are sequentially arranged and gradually lifted from the first steel frame 13 to a designed vault, and the third steel frame 14 is in contact with the vault of the middle pilot tunnel 15. The third steel frame 14 has the same height as the designed vault, and the third steel frame 14 is the first steel frame of the guide hole design grid in the middle hole method.
The bottom plate of the pilot tunnel with the double-side wall pilot tunnel method is lower than the bottom plate of the pilot tunnel with the middle tunnel method, and the arch top of the pilot tunnel with the double-side wall pilot tunnel method is higher than the arch top of the pilot tunnel with the middle tunnel method.
Based on the rapid conversion structure of the hole-in-underground tunnel method, the invention also provides a rapid conversion excavation method of the hole-in-underground tunnel method, which comprises the following steps:
step 2, after the pilot tunnel (1) and the pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel are excavated to a designed mileage, breaking the vertical supports of the pilot tunnel (1) and the pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel at the interface of the pilot tunnel method tunnel and constructing a temporary transverse channel 8; when the temporary transverse channel 8 is excavated, firstly constructing an upper channel 4 of the temporary transverse channel, densely arranging two annular steel frames on two sides of the channel, and plugging a tunnel face by adopting I-steel after the upper channel 4 is excavated to a designed length; after the upper layer channel 4 is completely constructed, breaking the vertical support 3 of the guide hole (2), constructing the lower layer channel 5, digging the lower layer channel 5 to a designed mileage, and sealing the end of the tunnel face by adopting an I-shaped steel frame and shotcrete; when the temporary transverse channel 8 is higher in height, a middle support is required to be arranged, and the middle support of the temporary transverse channel is placed on the transverse support 2 between the pilot tunnel (1) and the pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel.
and 5, excavating other residual pilot tunnels of the double-side-wall pilot tunnel method to the temporary passage to perform temporary passage partition wall rupture and end plugging construction.
And (3) at the excavation section of the tunnel double-side-wall pilot tunnel method, firstly, the upper and lower pilot tunnels on the left side are communicated, then, the double-side-wall pilot tunnel method is broken out at the interface with the middle hole method to temporarily support, a temporary transverse channel is constructed and used as a working surface for excavating the middle pilot tunnel of the middle hole method, and the double-side-wall pilot tunnel method is communicated with the pilot tunnel and can be used as a slag discharging channel of the middle hole method.
The invention discloses a method for quickly switching excavation of a tunnel in an underground excavation tunnel, and particularly relates to a method for switching construction of the tunnel in the underground excavation tunnel in a large-section mining process of a subway, wherein temporary construction channels are additionally arranged by adjusting the excavation footage step distance of a pilot tunnel in the process of switching construction of the tunnel in the normal direction of the pilot tunnel in double-side-wall pilot tunnel, the tunnel in the middle-tunnel process is excavated in advance before the construction of the tunnel in the double-side-wall pilot tunnel process is finished, the influence of process switching on the construction period is reduced, and therefore the construction period is saved, and the purpose of safe and orderly construction of the tunnel is ensured.
The key point of the invention is that the end plugs at the temporary transverse channel and the variable section are suitable for large-section tunnel engineering similar to urban rail transit.
The method is based on adjusting the step pitch of the excavation of the double-side-wall pilot tunnel method, penetrating through two adjacent pilot tunnels in advance, and then adding the transverse construction channel to provide a working face for the excavation of the middle tunnel method in advance, so that the overall excavation construction efficiency of the tunnel is greatly improved on the premise of ensuring the safety and stability of the tunnel, and the method has practical significance in the rapid conversion construction of the middle tunnel method in the large-section mine tunnel of the subway.
The invention has great practicability and economy. By taking the construction of a large-section tunnel of a subway in a certain city as an example, the construction of the tunnel is quickly switched by adopting a method for quickly switching the tunnel in the underground excavation tunnel, the overall construction efficiency of the tunnel can be greatly improved, the investment of lower cost is reduced, the construction of urban rail transit engineering is excellently completed, and good economic benefit is obtained.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified in various ways, or of being applied to other applications without modification, without departing from the scope of the invention.
Claims (10)
1. A quick conversion structure of hole method in undercut tunnel, its characterized in that: the tunnel boring device comprises a double-side-wall pilot tunnel method tunnel (9), a middle-hole method tunnel (10) and a temporary transverse channel (8), wherein the double-side-wall pilot tunnel method tunnel (9) is communicated with the middle-hole method tunnel (10) through the temporary transverse channel (8), when a tunnel is dug, the double-side-wall pilot tunnel method and the middle-hole method are converted through the temporary transverse channel (8), and the temporary transverse channel (8) is arranged between a pilot tunnel (1) of the double-side-wall pilot tunnel method tunnel (9), a pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel (9) and a middle pilot tunnel of the middle-hole method tunnel (10).
2. The rapid switching structure of the hole-in-tunnel method in a subsurface tunnel according to claim 1, wherein: the temporary transverse channel (8) comprises an upper channel (4) and a lower channel (5), wherein the upper channel (4) is positioned above the lower channel (5), and the upper channel (4) is constructed first and then the lower channel (5) is constructed.
3. The rapid switching structure of the hole-in-tunnel method in a subsurface tunnel according to claim 2, wherein: the temporary transverse channel (8) further comprises a middle support, and one end of the middle support is placed on the transverse support (2) between the guide holes (1) and (2) in the double-side-wall guide pit method tunnel (9).
4. A rapid switching structure for a hole in a undercut tunnel according to claim 2 or 3, wherein: the double-side-wall pilot tunnel method tunnel (9) comprises a pilot hole (1), a pilot hole (2), a pilot hole (3), a pilot hole (4), a pilot hole (5), a pilot hole (6), a pilot hole (1), a pilot hole (3) and a pilot hole (5) which are respectively positioned in the pilot hole (2),
(4) The upper part of the guide hole (6) is provided with a transverse support (2) between the upper guide hole and the lower guide hole, and a vertical support is arranged between the left guide hole and the right guide hole.
5. The rapid switching structure of the hole-in-tunnel method in a subsurface tunnel according to claim 4, wherein: the method is characterized in that the interface between the double-side-wall pilot tunnel method tunnel (9) and the middle-hole method tunnel (10) is used for breaking the pilot tunnel vertical support (1) of the double-side-wall pilot tunnel method tunnel (1), constructing the upper layer channel (4) of the temporary transverse channel (8), breaking the pilot tunnel vertical support (3) of the temporary transverse channel (2) and constructing the lower layer channel (5) of the temporary transverse channel (8).
6. The rapid switching structure of the hole-in-tunnel method in a subsurface tunnel according to claim 5, wherein: the middle tunnel method tunnel (10) comprises a middle pilot tunnel (15), a left pilot tunnel (16) and a right pilot tunnel (17), wherein the middle pilot tunnel (15) is positioned between the left pilot tunnel (16) and the right pilot tunnel (17), enters the middle pilot tunnel (15) of the middle tunnel method tunnel (10) from the temporary transverse channel (8), and then enters the left pilot tunnel (16) and the right pilot tunnel (17) of the middle pilot tunnel (15).
7. The rapid switching structure of the hole-in-tunnel method in a subsurface tunnel according to claim 6, wherein: the middle pilot tunnel (15) of the middle tunnel method tunnel (10) is provided with a first steel frame (13), a second steel frame (18) and a third steel frame (14), the three steel frames are sequentially arranged and gradually lifted to be in a vault from the first steel frame (13), and the third steel frame (14) is in contact with the vault of the middle pilot tunnel (15).
8. A method for quickly switching excavation by a hole in a subsurface tunnel is characterized in that: a rapid switching structure based on a hole-in-undercut tunnel method as claimed in any one of claims 1 to 7, said rapid switching excavation method comprising:
step 1, constructing the double side wall pilot tunnel by adopting (1) to (6) pilot tunnels, excavating the pilot tunnels on the left side (1) and the upper and lower pilot tunnels of the pilot tunnel (2) to a designed mileage, and sealing the end of the face of the pilot tunnel (1) and the face of the pilot tunnel (2) by adopting an I-shaped steel frame and shotcrete;
step 2, after the pilot tunnel (1) and the pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel are excavated to a designed mileage, breaking the vertical supports of the pilot tunnel (1) and the pilot tunnel (2) of the double-side-wall pilot tunnel method tunnel at the interface of the pilot tunnel method tunnel and the pilot tunnel, and constructing a temporary transverse channel (8);
step 3, after the construction of the temporary transverse channel (8) is finished, constructing an advance guide pipe along the vault outline of the tunnel by a middle-hole method, grouting and reinforcing to break the temporary transverse channel (8), and performing later construction according to the construction method by the middle-hole method after the temporary transverse channel is completely broken;
step 4, when the guide hole is moved into the middle hole method from the temporary transverse channel, gradually lifting the guide hole from the first steel frame (13) to the designed vault elevation by adopting a close-packed 3 steel frame gradually-lifting mode during construction, wherein the third steel frame (14) is the first steel frame of the guide hole design grid in the middle hole method, so that the quick conversion construction of the middle hole method is completed;
and 5, excavating other residual pilot tunnels of the double-side-wall pilot tunnel method to the temporary passage to perform temporary passage partition wall rupture and end plugging construction.
9. The method for quickly switching the excavation of the tunnel in the underground tunnel according to claim 8, wherein the method comprises the following steps: the process of constructing the temporary transverse channel (8) in the step 2 is as follows: when the tunnel is excavated, firstly constructing an upper layer tunnel (4) of the temporary transverse tunnel, densely arranging two annular steel frames at two sides of the tunnel, and plugging a tunnel face by adopting I-steel after the upper layer tunnel (4) is excavated to a designed length; after the upper layer channel (4) is completely constructed, breaking the vertical support (3) of the guide hole (2), constructing the lower layer channel (5), and after the lower layer channel (5) is dug to a designed mileage, adopting an I-shaped steel frame and shotcrete for end sealing on the tunnel face; when the height of the temporary transverse channel (8) is higher, a middle support is required to be arranged, and the middle support of the temporary transverse channel is arranged on the transverse support (2) between the pilot tunnel of the double-side-wall pilot tunnel method tunnel (1) and the pilot tunnel of the number (2).
10. The method for quickly switching the excavation of the tunnel in the underground tunnel according to claim 8, wherein the method comprises the following steps: the process of breaking the temporary transverse channel (8) in the step 3 is as follows: firstly, breaking an upper layer channel (4) of a temporary transverse channel (8) to a position where core soil (11) is reserved; and (3) temporarily closing the face by a guide hole feeding ruler 3-5 m in the middle of the middle guide hole method, then breaking the lower layer channel (5) of the temporary transverse channel (8), and excavating the lower half section (12) of the guide hole in the middle guide hole method after breaking, wherein the primary support grid is timely closed into a ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310356777.0A CN116163761A (en) | 2023-04-06 | 2023-04-06 | Quick switching structure and quick switching excavation method for tunnel in underground tunnel |
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| CN202310356777.0A CN116163761A (en) | 2023-04-06 | 2023-04-06 | Quick switching structure and quick switching excavation method for tunnel in underground tunnel |
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| CN116163761A true CN116163761A (en) | 2023-05-26 |
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| CN202310356777.0A Withdrawn CN116163761A (en) | 2023-04-06 | 2023-04-06 | Quick switching structure and quick switching excavation method for tunnel in underground tunnel |
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| CN (1) | CN116163761A (en) |
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| JP2004211361A (en) * | 2002-12-27 | 2004-07-29 | Shimizu Corp | Branch junction construction method for shield tunnel |
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| WO2016095630A1 (en) * | 2014-12-15 | 2016-06-23 | 中铁第四勘察设计院集团有限公司 | Method for constructing extra-large variable cross section tunnel |
| JP2018138738A (en) * | 2017-02-24 | 2018-09-06 | 大成建設株式会社 | Invert construction method |
| CN111810187A (en) * | 2020-07-20 | 2020-10-23 | 中国路桥工程有限责任公司 | Urban non-center pilot tunnel bifurcation tunnel turning construction method |
| CN113389566A (en) * | 2021-07-30 | 2021-09-14 | 中铁十二局集团有限公司 | Construction method for rapid expanding excavation and conversion by CRD (China railway track) normal double-side-wall pit guiding method |
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| JP2004211361A (en) * | 2002-12-27 | 2004-07-29 | Shimizu Corp | Branch junction construction method for shield tunnel |
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| WO2016095630A1 (en) * | 2014-12-15 | 2016-06-23 | 中铁第四勘察设计院集团有限公司 | Method for constructing extra-large variable cross section tunnel |
| JP2018138738A (en) * | 2017-02-24 | 2018-09-06 | 大成建設株式会社 | Invert construction method |
| CN111810187A (en) * | 2020-07-20 | 2020-10-23 | 中国路桥工程有限责任公司 | Urban non-center pilot tunnel bifurcation tunnel turning construction method |
| CN113389566A (en) * | 2021-07-30 | 2021-09-14 | 中铁十二局集团有限公司 | Construction method for rapid expanding excavation and conversion by CRD (China railway track) normal double-side-wall pit guiding method |
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