CN115478870A - Slag tapping structure and method for double-side-wall pit guiding method of underground excavation section of subway - Google Patents
Slag tapping structure and method for double-side-wall pit guiding method of underground excavation section of subway Download PDFInfo
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- CN115478870A CN115478870A CN202211248430.6A CN202211248430A CN115478870A CN 115478870 A CN115478870 A CN 115478870A CN 202211248430 A CN202211248430 A CN 202211248430A CN 115478870 A CN115478870 A CN 115478870A
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- 238000000034 method Methods 0.000 title claims abstract description 73
- 239000002893 slag Substances 0.000 title claims abstract description 60
- 238000009412 basement excavation Methods 0.000 title claims abstract description 50
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 14
- 239000002689 soil Substances 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 239000013049 sediment Substances 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 208000029152 Small face Diseases 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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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
- E21D9/14—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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Abstract
The invention discloses a slag tapping structure for a double-side-wall pit guiding method of a subway underground excavation interval, which comprises a vertical support opening and a transverse support opening, wherein a vertical support and a transverse support are arranged in a tunnel face during construction of the double-side-wall pit guiding method, the vertical support opening is arranged on the vertical support, the transverse support opening is arranged on the transverse support, and a reinforcing structure is arranged at the opening of the vertical support opening. Through setting up vertical support opening and horizontal support opening, increase the channel of slagging tap of the sediment soil body of excavating, under the prerequisite of guaranteeing the whole safety and stability of interval tunnel, very big improvement tunnel totality excavation construction work efficiency. The invention discloses a deslagging method for a double-side-wall pit guiding method of a subway underground excavation region.
Description
Technical Field
The invention belongs to the technical field of double-side-wall pit guiding method construction, and particularly relates to a slag tapping structure and method for a double-side-wall pit guiding method in a subway underground excavation region.
Background
In the construction process of the metro large-section underground excavation region adopting the double-side-wall pit guiding method, as the temporary vertical supports and the transverse supports exist, the construction processes are more crossed, the construction progress is slow, manual excavation and manual unearthing are usually adopted during earthwork excavation, the unearthing of each pit is poured in the vertical shaft of the tunnel portal through manual utilization of a small-sized cart, the general metro region line is longer, the construction efficiency is greatly limited, and the purpose of safe and rapid construction of the metro can not be realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the slag tapping structure which is simple in structure and convenient to use and is used for the underground excavation interval double-side-wall pit guiding method, the slag tapping channel of the excavated slag soil body is increased by arranging the vertical supporting opening and the transverse supporting opening, and the overall excavation construction efficiency of the tunnel is greatly improved on the premise of ensuring the overall safety and stability of the interval tunnel; the invention also provides a deslagging method for the double-side-wall pit guiding method of the underground excavation region of the subway.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a structure of slagging tap that is used for interval double side wall pilot tunnel method of subway undercut, includes vertical braces opening and horizontal support opening, is equipped with vertical braces and horizontal support in the face during double side wall pilot tunnel method construction, sets up the vertical braces opening on vertical braces, sets up horizontal support opening on horizontal support, and vertical braces open-ended opening part is equipped with reinforced structure.
Further, reinforced structure is including setting up crossbeam I, the crossbeam II of opening bottom and the curb girder of setting in both sides portion at the opening top, and crossbeam I and II equal fixed connection of crossbeam are on vertical support, and the both ends of curb girder are fixed connection respectively on crossbeam I and crossbeam II.
Furthermore, the side beams are densely arranged steel frames, all steel frames in the densely arranged steel frames are tightly connected, the side parts of the densely arranged steel frames are fixedly connected to the vertical supports, and two end parts of the densely arranged steel frames are respectively and fixedly connected to the cross beam I.
Furthermore, the pilot pit is divided into an upper pilot pit and a lower pilot pit by the transverse support, the pilot pit is divided into an upper pilot pit left pilot pit, a lower pilot pit left pilot pit, an upper pilot pit middle pilot pit, a lower pilot pit middle pilot pit, an upper pilot pit right pilot pit and a lower pilot pit right pilot pit by the vertical support and the transverse support, vertical support openings are formed in the vertical supports of the upper pilot pit left pilot pit and the upper pilot pit right pilot pit, a transverse support opening is formed in the transverse support of the upper pilot pit middle pilot pit, and the lower pilot pit middle pilot pit is a total slag discharging channel of the tunnel.
Furthermore, the vertical support opening comprises an upper pilot hole left pilot hole opening and an upper pilot hole right pilot hole opening, the upper pilot hole left pilot hole and the upper pilot hole right pilot hole are respectively communicated with the upper pilot hole middle pilot hole through the upper pilot hole left pilot hole opening and the upper pilot hole right pilot hole opening, and the upper pilot hole middle pilot hole is communicated with the lower pilot hole middle pilot hole through the transverse support opening.
Furthermore, along the excavation direction, upper pit left pilot hole openings are arranged on vertical supports of the upper pit left pilot hole every 80-120m, upper pit right pilot hole openings are arranged on vertical supports of the upper pit right pilot hole every 80-120m, and the upper pit left pilot hole openings are opposite to and staggered with the upper pit right pilot hole openings.
Furthermore, the positions of the opening of the upper pilot hole left and the opening of the upper pilot hole right are staggered by 30-50m from front to back.
Furthermore, transverse supporting openings are arranged on the transverse supports of the pilot tunnel in the middle of the upper pilot tunnel at intervals of 100-150m, and the size of the openings of the transverse supporting openings is less than or equal to 1m.
Furthermore, a slag discarding chute is arranged in the middle pilot tunnel of the lower pilot tunnel, and the top end of the slag discarding chute is connected below the transverse support opening.
The invention also relates to a deslagging method for the double-side-wall pit guiding method of the underground excavation region of the subway, and based on the deslagging structure for the double-side-wall pit guiding method of the underground excavation region of the subway, the deslagging method comprises the following steps:
s1, firstly, determining the positions of a vertical supporting opening and a transverse supporting opening through calculation and analysis;
s2, when the double-side-wall pilot tunnel method is constructed, upper pilot tunnel left pilot tunnel openings are arranged on vertical supports of an upper pilot tunnel left pilot tunnel every 80-120m, upper pilot tunnel right pilot tunnel openings are arranged on vertical supports of an upper pilot tunnel right pilot tunnel every 80-120m, and the positions of the upper pilot tunnel left pilot tunnel openings and the upper pilot tunnel right pilot tunnel openings are staggered by 30-50m from front to back;
s, excavating the middle pilot tunnel of the upper pilot tunnel, wherein transverse support openings are arranged on transverse supports of the middle pilot tunnel of the upper pilot tunnel at intervals of 100-150m, the size of each opening of each transverse support opening is less than or equal to 1m, and each opening is used as a slag tapping and dumping channel of a left pilot tunnel of the upper pilot tunnel and a right pilot tunnel of the upper pilot tunnel;
s, excavating an upper pilot tunnel left pilot tunnel and an upper pilot tunnel right pilot tunnel, passing through the upper pilot tunnel left pilot tunnel and the upper pilot tunnel right pilot tunnel by a small-sized cart manually, entering an upper pilot tunnel middle pilot tunnel, and pouring into a lower pilot tunnel middle pilot tunnel through a transverse supporting opening of the upper pilot tunnel middle pilot tunnel;
and S, taking the middle pilot tunnel of the lower pilot tunnel as a tunnel total slag discharge channel, and configuring a small excavator for slagging off and loading.
The technical scheme adopted by the invention has the advantages that:
1. according to the invention, on the premise of meeting the safety stability, the position of a supporting opening is determined through calculation and analysis, the slag discharging channel of the excavated slag soil body is increased by increasing the vertical supporting opening and the horizontal supporting opening and adjusting the opening positions of the horizontal supporting and the vertical supporting, the opening positions are reinforced by adopting a 3-steel frame close-spaced method, and on the premise of ensuring the whole safety and stability of the interval tunnel, the overall excavation construction efficiency of the tunnel is greatly improved, so that the purpose of safe and rapid construction of a double-side-wall pit guiding method multi-hole in a large-section excavation interval of the subway under the condition of limited slag discharging space is achieved, and therefore, the double-side-wall pit guiding method multi-hole slag discharging in the subway interval has practical significance.
2. The slag tapping structure and method for the double-side-wall pit guiding method in the underground excavation region of the subway have higher practicability and economy. Taking the construction of a large-section underground excavation interval tunnel of a certain city subway by adopting a double-side-wall pit guiding method as an example, the civil engineering deslagging is carried out by adopting the deslagging method of the double-side-wall pit guiding method of the underground excavation interval, the tunnel excavation work efficiency can be greatly improved, the underground excavation engineering of the subway interval can be excellently completed with lower cost investment, and good economic benefit is obtained.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic view of a vertical support opening reinforcement structure of the present invention;
FIG. 2 is a schematic view of the upper pilot hole, left and right, and middle pilot hole openings of the present invention;
FIG. 3 is a schematic view of slag tapping from the middle pilot tunnel of the lower pilot tunnel according to the present invention.
The labels in the above figures are respectively: 1-vertical support, 2-horizontal support, 3-vertical support opening, 4-horizontal support opening, 5-reinforcing structure, 51-beam I, 52-beam II, 53-densely arranged steel frame, 61-upper pilot tunnel left pilot tunnel, 62-lower pilot tunnel left pilot tunnel, 63-upper pilot tunnel middle pilot tunnel, 64-lower pilot tunnel middle pilot tunnel, 65-upper pilot tunnel right pilot tunnel, 66-lower pilot tunnel right pilot tunnel and 7-slag dumping chute.
Detailed Description
In the present invention, it is to be understood that the term "length"; "Width"; "Up"; "Down"; "front"; "Back"; "left"; "Right"; "vertical"; "horizontal"; "Top"; "bottom" "inner"; "outer"; "clockwise"; "counterclockwise"; "axial"; "plane direction"; "circumferential" and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the indicated device or element must have a particular orientation; constructed and operative in a particular orientation and therefore should not be construed as limiting the invention.
As shown in fig. 1 to 3, a slag tapping structure for a double-side-wall pit guiding method of a subway underground excavation region comprises a vertical support opening 3 and a transverse support opening 4, wherein a vertical support 1 and a transverse support 2 are arranged in a tunnel face during construction of the double-side-wall pit guiding method, the vertical support opening is arranged on the vertical support 1, the transverse support opening 4 is arranged on the transverse support 2, and a reinforcing structure 5 is arranged at the opening of the vertical support opening 3. Through setting up vertical support opening and horizontal support opening, increase the channel of slagging tap of the sediment soil body of excavating, under the prerequisite of guaranteeing the whole safety and stability of interval tunnel, very big improvement tunnel totality excavation construction work efficiency.
The transverse support opening 4 is a rectangular opening provided in the base plate of the transverse support 2, and a reinforcing structure 5 can also be provided at the opening of the transverse support opening 4 for increasing the structural stability.
The reinforced structure is including setting up crossbeam I51 at the opening top, crossbeam II 52 of opening bottom and setting up the curb girder in both sides portion, and crossbeam I51 and II 52 all fixed connection are on vertical support 1 or horizontal support 2, and the both ends of curb girder are fixed connection respectively on crossbeam I51 and II 52. The curb girder is close-packed steelframe 53, each steelframe zonulae occludens in the close-packed steelframe 53, and close-packed steelframe 53's lateral part fixed connection is on vertical braces 1 or horizontal support 2, and close-packed steelframe 53's both ends difference fixed connection is on crossbeam I51. Preferably, the dense steel frames 53 are 3 steel frames for reinforcing the opening position.
The guide pit is divided into an upper guide pit and a lower guide pit by the transverse support 2, the guide pit is divided into an upper guide pit left guide hole 61, a lower guide pit left guide hole 62, an upper guide pit middle guide hole 63, a lower guide pit middle guide hole 64, an upper guide pit right guide hole 65 and a lower guide pit right guide hole 66 by the vertical support 1 and the transverse support 2, vertical support openings 3 are formed in the vertical supports of the upper guide pit left guide hole 61 and the upper guide pit right guide hole 65, a transverse support opening 4 is formed in the transverse support of the upper guide pit middle guide hole 63, the lower guide pit middle guide hole 64 is a tunnel total slag discharge channel, a small excavator is configured for slag skimming and loading, a small slag discharging vehicle is selected according to the difference of the large and small faces of the section of the tunnel portal, 1 side-dump loader is adopted, and 3-6 small dump trucks are adopted for slag transportation of transportation equipment.
The vertical support opening 3 comprises an upper pilot left pilot opening 31 and an upper pilot right pilot opening 32, the upper pilot left pilot 61 and the upper pilot right pilot 65 are in communication with an upper pilot middle pilot 63 through the upper pilot left pilot opening 31 and the upper pilot right pilot opening 32, respectively, the upper pilot middle pilot 63 is in communication with a lower pilot middle pilot 64 through the lateral support opening 4. 4. During the excavation process of the left pilot tunnel and the right pilot tunnel of the upper pilot tunnel, a small-sized cart manually passes through the left pilot tunnel opening 31 of the upper pilot tunnel and the right pilot tunnel opening 32 of the upper pilot tunnel to enter the middle pilot tunnel 63 of the pilot tunnel, and the small-sized openings, namely the transverse supporting openings 4, of the middle pilot tunnel 63 of the pilot tunnel are poured into the middle pilot tunnel of the lower pilot tunnel.
Along the excavation direction, upper pit left pilot openings 31 are arranged every 80-120m on the vertical supports of the upper pit left pilot 61, upper pit right pilot openings 32 are arranged every 80-120m on the vertical supports of the upper pit right pilot 65, and the upper pit left pilot openings 31 and the upper pit right pilot openings 32 are opposite and staggered. The positions of the upper pilot hole left opening 31 and the upper pilot hole right opening 32 are staggered by 30-50m. And transverse supporting openings 4 are arranged on the transverse supports of the middle pilot tunnel 63 of the upper pilot pit at intervals of 100-150m, and the opening size of each transverse supporting opening 4 is less than or equal to 1m.
A slag chute 7 is arranged in the middle pilot tunnel 64 of the lower pilot tunnel, and the top end of the slag chute 7 is connected below the transverse support opening 4.
Specifically, tunnel excavation supporting construction is carried out in a subway underground excavation section by adopting a double-side-wall pilot tunnel method, the position of an opening of a temporary support is determined through calculation and analysis, when the temporary vertical support is constructed by adopting the double-side-wall pilot tunnel method, left and right pilot tunnels of an upper pilot tunnel are opened on the vertical support every 100m, 3 steel frames which are densely arranged at the left and right of the opening position of the vertical support are used as portal frames for reinforcement, the opening positions of the left and right pilot tunnels of the upper pilot tunnel are staggered by 50m from front to back, the pilot tunnel excavation process in the middle of the upper pilot tunnel is carried out, rectangular openings, namely transverse support openings, are arranged on a bottom plate of a transverse support every 150m, the opening size is not larger than 1m, and the opening is used as a slag tapping dumping channel of the left and right pilot tunnels of the upper pilot tunnel, namely a transverse support opening. The middle pilot tunnel of the lower pilot tunnel is used as a total slag discharging channel of the tunnel, a small excavator is configured for slag removal and loading, a small slag discharging vehicle is selected according to the difference of the large and small faces of the section of the tunnel opening, 1 side dump loader is adopted, and 3-6 small dump trucks are adopted for slag transportation of transportation equipment.
According to the method, on the premise of meeting the safety stability, the position of a supporting opening is determined through calculation and analysis, the positions of a vertical supporting opening 3 and a transverse supporting opening 4 are increased, the positions of the openings of the transverse supports and the vertical supports are adjusted, a slag discharging channel of an excavated slag soil body is increased, the opening positions are reinforced by a 3-steel frame close arrangement method, the overall excavation construction efficiency of the tunnel is greatly improved on the premise of ensuring the whole safety and stability of the tunnel in the interval, and therefore the purpose of safe and rapid construction of the double-side-wall pit guiding method multi-hole in the large-section underground excavation interval of the subway under the condition of limited slag discharging space is achieved, and the fact that the double-side-wall pit guiding method multi-hole slag discharging is adopted in the subway interval has practical significance.
Based on the slag tapping structure for the double-side-wall pit guiding method in the underground excavation region of the subway, the invention also provides a slag tapping method for the double-side-wall pit guiding method in the underground excavation region of the subway, and the slag tapping method comprises the following steps:
s1, firstly, determining the positions of a vertical supporting opening 3 and a transverse supporting opening 4 through calculation and analysis; the opening positions of the left pilot tunnel and the right pilot tunnel of the upper pilot tunnel and the middle pilot tunnel of the upper pilot tunnel are ensured to meet the requirements of safety and stability.
S2, when the double-side-wall pit guiding method is used for construction, upper pit guiding left pit guiding openings 31 are arranged on vertical supports of the upper pit guiding left pit 61 every 80-120m, upper pit guiding right pit guiding openings 32 are arranged on vertical supports of the upper pit guiding right pit 65 every 80-120m, and the positions of the upper pit guiding left pit guiding openings 31 and the positions of the upper pit guiding right pit guiding openings 32 are staggered by 30-50m from front to back; preferably, when the temporary vertical supports are constructed by the double-side-wall pit guiding method, the left and right pilot holes of the upper pit guiding are subjected to pre-opening construction every 100m of the temporary vertical supports, 3 steel frames are densely arranged at the left and right sides of the opening positions of the vertical supports and serve as portal frames for reinforcement, 4 longitudinal connecting ribs are arranged at 0.1m positions of the densely arranged steel frames at the opening positions, close to the two sides of the primary supports (namely, the vertical supports or the transverse supports), and form hidden beams and hidden columns with the densely arranged steel frames, and transverse steel frames, namely, beams II 52, are arranged at the bottoms of the densely arranged steel frames and serve as portal support beams; the opening positions of the left and right pilot holes of the upper pilot pit are staggered by 50m from front to back.
S3, in the process of excavating the middle pilot tunnel of the upper pilot tunnel, transverse supporting openings 4 are arranged on transverse supports of the middle pilot tunnel 63 of the upper pilot tunnel at intervals of 100-150m, the size of the opening of each transverse supporting opening 4 is less than or equal to 1m, and the transverse supporting openings are used as slag tapping and dumping channels of the left pilot tunnel 61 of the upper pilot tunnel and the right pilot tunnel 65 of the upper pilot tunnel; preferably, 3, in the process of excavating the middle pilot tunnel of the upper pilot tunnel, rectangular openings, namely transverse supporting openings, are formed in the bottom plate every 150m, the size of each opening is not more than 1m, and the opening is used as a slag dumping channel for the left pilot tunnel and the right pilot tunnel of the upper pilot tunnel.
S4, mechanically excavating the pilot tunnel on the tunnel, and stopping small-sized excavating equipment at the tunnel face until the pilot tunnel is communicated; during the excavation process of the upper pilot tunnel left pilot tunnel and the upper pilot tunnel right pilot tunnel, the upper pilot tunnel left pilot tunnel 61 and the upper pilot tunnel right pilot tunnel 65 are penetrated through by a small-sized cart manually, enter the upper pilot tunnel middle pilot tunnel, and are poured into the lower pilot tunnel middle pilot tunnel through the transverse supporting opening 4 of the upper pilot tunnel middle pilot tunnel;
and S5, taking the middle pilot tunnel of the lower pilot tunnel as a total slag discharging channel of the tunnel, and configuring a small excavator for slagging off and loading. And selecting a small slag discharging vehicle according to the difference of the large and small surfaces of the section of the opening, wherein 1 side-dumping loader is adopted, and 3-6 small dump trucks are adopted as transportation equipment for slag transportation.
In order to ensure the controllable slag discharging process, waste gas purification devices are arranged on the devices such as automobiles, loaders and the like entering the holes, so that the content of harmful gases such as carbon monoxide in tail gas is reduced. When the upper guide pit dumps the slag and the lower guide pit loads the slag, the special person is configured to command and clearly command the communication signal.
The slag tapping structure and method for the double-side-wall pit guiding method in the underground excavation region of the subway have higher practicability and economy. Taking the construction of a large-section underground excavation interval tunnel of a certain city subway by adopting a double-side-wall pit guiding method as an example, the civil engineering deslagging is carried out by adopting the deslagging method of the double-side-wall pit guiding method of the underground excavation interval, the tunnel excavation work efficiency can be greatly improved, the underground excavation engineering of the subway interval can be excellently completed with lower cost investment, and good economic benefit is obtained.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the technical solution of the invention or to apply the concept and technical solution of the invention directly to other occasions without modification.
Claims (10)
1. The utility model provides a structure of slagging tap that is used for regional double-wall pit guiding method of subway undercut which characterized in that: including vertical support opening (3) and horizontal support opening (4), be equipped with vertical support (1) and horizontal support (2) in the face during double-side wall pit guiding method construction, set up vertical support opening on vertical support (1), set up horizontal support opening (4) on horizontal support (2), the opening part of vertical support opening (3) is equipped with reinforced structure (5).
2. The slag tapping structure for the double-side-wall pit guiding method of the underground excavation section of the subway as claimed in claim 1, wherein: the reinforced structure is including setting up crossbeam I (51) at the opening top, crossbeam II (52) of opening bottom and setting up the curb girder in both sides portion, and equal fixed connection is on vertical braces (1) in crossbeam I (51) and crossbeam II (52), and fixed connection is on crossbeam I (51) and crossbeam II (52) respectively at the both ends of curb girder.
3. The slag tapping structure for the double-side-wall pit guiding method of the underground excavation section of the subway as claimed in claim 2, wherein: the side beams are densely arranged steel frames (53), all steel frames in the densely arranged steel frames (53) are tightly connected, the side parts of the densely arranged steel frames (53) are fixedly connected to the vertical supports (1), and two end parts of the densely arranged steel frames (53) are fixedly connected to the cross beams I (51) respectively.
4. The deslagging structure for the double-side-wall pit guiding method of the underground excavation section according to any one of claims 1 to 3, wherein: the pit is divided into an upper pit and a lower pit by the transverse support (2), the pit is divided into an upper pit left pilot hole (61), a lower pit left pilot hole (62), an upper pit middle pilot hole (63), a lower pit middle pilot hole (64), an upper pit right pilot hole (65) and a lower pit right pilot hole (66) by the vertical support (1) and the transverse support (2), a vertical support opening (3) is formed in the vertical support of the upper pit left pilot hole (61) and the upper pit right pilot hole (65), a transverse support opening (4) is formed in the transverse support of the upper pit middle pilot hole (63), and the lower pit middle pilot hole (64) is a tunnel total slag discharge channel.
5. The slag tapping structure for the double-side-wall pit guiding method of the underground excavation section of the subway as claimed in claim 4, wherein: vertical support opening (3) are including last pilot hole left side pilot hole opening (31) and last pilot hole right side pilot hole opening (32), go up pilot hole left side pilot hole (61) and go up pilot hole right side pilot hole (65) and go up pilot hole middle pilot hole (63) intercommunication through last pilot hole left side pilot hole opening (31) and last pilot hole right side pilot hole opening (32) respectively, go up pilot hole middle pilot hole (63) and lead hole (64) intercommunication in the middle of the pit down through horizontal support opening (4).
6. The slag tapping structure for the double-side-wall pit guiding method of the underground excavation section of the subway as claimed in claim 5, wherein: along the excavation direction, upper pit left pilot hole openings (31) are arranged on vertical supports of the upper pit left pilot hole (61) every 80-120m, upper pit right pilot hole openings (32) are arranged on vertical supports of the upper pit right pilot hole (65) every 80-120m, and the upper pit left pilot hole openings (31) and the upper pit right pilot hole openings (32) are opposite and staggered.
7. The slag tapping structure for the double-side-wall pit guiding method of the underground excavation section of the subway as claimed in claim 6, wherein: the positions of the upper pilot hole left opening (31) and the upper pilot hole right opening (32) are staggered by 30-50m from front to back.
8. The slag tapping structure for the double-side-wall pit guiding method of the underground excavation section of the subway as claimed in claim 6, wherein: and transverse supporting openings (4) are arranged on the transverse supports of the upper pilot tunnel middle pilot tunnel (63) at intervals of 100-150m, and the opening size of each transverse supporting opening (4) is less than or equal to 1m.
9. The slag tapping structure for the double-side-wall pit guiding method of the underground excavation section of the subway as claimed in claim 5, wherein: a slag discarding chute (7) is arranged in the middle pilot tunnel (64) of the lower pilot tunnel, and the top end of the slag discarding chute (7) is connected below the transverse supporting opening (4).
10. A slag tapping method for a double-side-wall pit guiding method of a subway underground excavation region is characterized by comprising the following steps: a tapping structure for a double-side-wall pit guiding method in an underground excavation section of a subway according to any one of claims 1 to 9, the tapping method comprising:
s1, firstly, determining the positions of a vertical supporting opening (3) and a transverse supporting opening (4) through calculation and analysis;
s2, when the double-side-wall pit guiding method is constructed, upper pit guiding left pilot hole openings (31) are arranged on vertical supports of an upper pit guiding left pilot hole (61) every 80-120m, upper pit guiding right pilot hole openings (32) are arranged on vertical supports of an upper pit guiding right pilot hole (65) every 80-120m, and the positions of the upper pit guiding left pilot hole openings (31) and the positions of the upper pit guiding right pilot hole openings (32) are staggered by 30-50m from front to back;
s3, in the process of excavating the middle pilot tunnel of the upper pilot tunnel, transverse supporting openings (4) are arranged on transverse supports of the middle pilot tunnel (63) of the upper pilot tunnel at intervals of 100-150m, the size of the opening of each transverse supporting opening (4) is less than or equal to 1m, and the transverse supporting openings are used as slag tapping and dumping channels of the left pilot tunnel (61) of the upper pilot tunnel and the right pilot tunnel (65) of the upper pilot tunnel;
s4, excavating the upper pilot tunnel left pilot tunnel and the upper pilot tunnel right pilot tunnel, passing through the upper pilot tunnel left pilot tunnel (61) and the upper pilot tunnel right pilot tunnel (65) by a small-sized cart manually, entering the upper pilot tunnel middle pilot tunnel, and dumping into the lower pilot tunnel middle pilot tunnel through a transverse supporting opening (4) of the upper pilot tunnel middle pilot tunnel;
and S5, taking the middle pilot tunnel of the lower pilot tunnel as a total slag discharging channel of the tunnel, and configuring a small excavator for slagging off and loading.
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| CN202211248430.6A CN115478870A (en) | 2022-10-12 | 2022-10-12 | Slag tapping structure and method for double-side-wall pit guiding method of underground excavation section of subway |
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| CN202211248430.6A CN115478870A (en) | 2022-10-12 | 2022-10-12 | Slag tapping structure and method for double-side-wall pit guiding method of underground excavation section of subway |
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| CN107201906A (en) * | 2017-06-16 | 2017-09-26 | 中铁二十四局集团安徽工程有限公司 | Slag tap structure and the slag tapping method of a kind of tunnel top base tunnel |
| CN109139021A (en) * | 2018-11-01 | 2019-01-04 | 中铁十八局集团有限公司 | A kind of more pilot tunnel Construction Organization Methods of multi-step |
| CN111594185A (en) * | 2020-05-29 | 2020-08-28 | 中铁一局集团有限公司 | Construction method for mechanically excavating CRD (cross section) of tunnel under loess stratum condition |
| CN115163084A (en) * | 2022-07-22 | 2022-10-11 | 中交（广州）建设有限公司 | Mechanical construction method for ultra-large section tunnel by double-side-wall pit guiding method |
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- 2022-10-12 CN CN202211248430.6A patent/CN115478870A/en active Pending
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| CN107201906A (en) * | 2017-06-16 | 2017-09-26 | 中铁二十四局集团安徽工程有限公司 | Slag tap structure and the slag tapping method of a kind of tunnel top base tunnel |
| CN109139021A (en) * | 2018-11-01 | 2019-01-04 | 中铁十八局集团有限公司 | A kind of more pilot tunnel Construction Organization Methods of multi-step |
| CN111594185A (en) * | 2020-05-29 | 2020-08-28 | 中铁一局集团有限公司 | Construction method for mechanically excavating CRD (cross section) of tunnel under loess stratum condition |
| CN115163084A (en) * | 2022-07-22 | 2022-10-11 | 中交（广州）建设有限公司 | Mechanical construction method for ultra-large section tunnel by double-side-wall pit guiding method |
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