CN210977480U - Double-split originating station structure of small-clear-distance double-line tunnel shield - Google Patents
Double-split originating station structure of small-clear-distance double-line tunnel shield Download PDFInfo
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- CN210977480U CN210977480U CN201921743820.4U CN201921743820U CN210977480U CN 210977480 U CN210977480 U CN 210977480U CN 201921743820 U CN201921743820 U CN 201921743820U CN 210977480 U CN210977480 U CN 210977480U
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Abstract
The utility model discloses a little clean distance double-line tunnel shield constructs two components originating station structure, including being located underground station major structure, the last hoist and mount mouth that is provided with hoist and mount equipment usefulness of station major structure and the unearthing mouth of usefulness that unearths, the entrance to a cave department of station major structure one side is provided with the pre-buried steel ring of shield structure, and entrance to a cave length direction has assembled shield structure host computer, equipment bridge, 1# trailer in proper order, the entrance to a cave axis outside is provided with the middle part trailer that accessible extension pipeline inserted 1# trailer rear, is provided with the afterbody trailer behind the accessible hoist and mount mouth crane down the access middle part trailer subaerially. The utility model discloses carry out reasonable spatial layout to the starting station structure well, the construction is reverse secretly excavated pilot tunnel in order to assist the components of a whole that can function independently to originate, installs in proper order and originates frame, reaction frame, burden ring segment, realizes originating the construction because of the not enough components of a whole body that leads to double-line little clean apart from tunnel shield of starting under the difficult condition of originating in the place space, applicable in the not enough engineering of subway shield starting station end well length.
Description
Technical Field
The utility model belongs to the engineering field of originating in the tunnel, concretely relates to little net distance double-line tunnel shield constructs two components and originates station structure.
Background
With the rapid development of urban rail transit, shield construction gradually becomes the main method for constructing underground tunnels. According to the requirements of a conventional shield construction process, a shield starting well needs to be arranged at the end of a station, the construction range of a main structure of the station needs to have the conditions of placing a shield machine head, a length space of rear supporting equipment and arranging a slag hole, and corresponding starting work is completed in the end starting well.
To possess above-mentioned condition, station main part construction needs occupy a large amount of construction sites to satisfy construction needs, conventional shield structure originating mode has characteristics such as area is big, station main part construction cycle length. Under the condition of complex surrounding environment of a city, the starting station with proper construction length is difficult to construct due to the influences of the removal and occupation of ground buildings (structures), the relocation of underground municipal pipelines, the diversion of ground traffic and the like. When the ground is removed and the land occupation coordination progresses slowly, the section main line is restricted by the construction period and has to be constructed in advance, and on the premise of meeting the requirement of the construction period of the subway and not influencing the structure safety, a novel split starting method capable of carrying out the double-line tunnel in a short end starting well is needed to be researched, so that the starting safety of the shield is ensured, and the delay of the construction period is reduced.
Disclosure of Invention
The utility model discloses a solve the problem that prior art exists and propose, its purpose provides a little net apart from double-body originating station structure of double-line tunnel shield.
The technical scheme of the utility model is that: the utility model provides a little clean distance double-line tunnel shield constructs two components originating station structure, is including being located underground station major structure, the last hoist and mount mouth that is provided with hoist equipment for use of station major structure and the unearthed mouth of usefulness, the entrance to a cave department of station major structure one side is provided with the pre-buried steel ring of shield structure, and entrance to a cave length direction assembles shield structure host computer, equipment bridge, 1# trailer in proper order, the entrance to a cave axis outside is provided with the middle part trailer that accessible extension pipeline inserted 1# trailer rear, is provided with the afterbody trailer behind the accessible hoist and mount mouth crane down the access middle part trailer subaerially.
Furthermore, the station main body structure comprises two holes, and temporary reverse guide holes are formed at the side walls of the opposite sides of the station main body structure.
Furthermore, the hoisting opening is located above one side of the opening, and the transverse distance between the soil outlet and the opening meets the requirements of placing a host machine of the shield machine, an equipment bridge and a No. 1 trailer.
Furthermore, a hoisting port gantry crane used for vertical transportation of duct pieces and grease is arranged on the hoisting port, and a soil discharging port gantry crane used for conveying dregs is arranged on the soil discharging port.
Furthermore, C15 plain concrete for ensuring the stability of the stratum of the shield starting end is backfilled at the front fertilizer groove of the tunnel portal on the side wall of the main structure of the station.
Furthermore, the shield pre-buried steel ring is connected with the steel bars of the station main body structure, and a sealing structure for sealing a gap between the tunnel portal and a shield machine host is arranged outside the shield pre-buried steel ring.
Furthermore, the sealing structure comprises a rubber curtain and a circular baffle, wherein the rubber curtain and the circular baffle are sequentially arranged outside the shield embedded steel ring, one end of the stud bolt penetrates through the baffle, the rubber curtain and the shield embedded steel ring and is screwed into an embedded nut, the other end of the stud bolt is screwed with a nut, the baffle is hinged with a plurality of sealing folding pressing plates through a pin bush and a pin shaft, and a gasket is arranged between the baffle and the nut.
Furthermore, an originating frame is arranged in the station main body structure, and originating frame reinforcing section steel for reinforcing along the length direction is arranged on the originating frame.
Further, be provided with shield tail supporting component in the station major structure, shield tail supporting component includes reaction frame and burden ring section of jurisdiction, two horizontal reaction frame crossbeams between two vertical reaction frame stands and the reaction frame stand are drawn together to the reaction frame, are provided with reaction frame bracing between adjacent reaction frame stand, the reaction frame crossbeam, and the reaction frame crossbeam back at two reaction frame stands and top is provided with the reaction frame back support, the reaction frame back support links to each other with pre-buried steel sheet.
Furthermore, the negative ring pipe piece comprises a bottom A2 pipe piece, the two sides of the A2 pipe piece are respectively provided with an A1 pipe piece and an A3 pipe piece, the A1 pipe piece is provided with a B2 pipe piece, the A3 pipe piece is provided with a B1 pipe piece, and a K pipe piece is arranged between the B2 pipe piece and the B1 pipe piece.
The utility model discloses a carry out reasonable spatial layout to the starting station structure well, take the interim reverse undercut pilot tunnel of construction to initiate with supplementary components of a whole that can function independently, install the shield in proper order and initiate the frame, the reaction frame, the burden ring section of jurisdiction, the realization leads to whole components of a whole that can function independently of starting the tunnel shield under the difficult condition of whole initiation to initiate the construction, through engineering practice verification, this components of a whole that can function independently originating method, it is little to have construction cross influence, little to all ring edge borders influence, slow down time limit for a project pressure, advantages such as safe and reliable, it is applicable in the not enough engineering of subway shield starting station end well length.
Drawings
FIG. 1 is a schematic diagram of the station end backfill reinforcement of the present invention;
fig. 2 is a schematic plan view of the split starting equipment facility of the shield right line of the present invention;
fig. 3 is a schematic plan view of the split starting equipment facility of the shield left line of the present invention;
fig. 4 is a schematic sectional layout view of the shield split starting equipment facility of the present invention;
FIG. 5 is a side view of the installation of the sealing folding pressing plate and the rubber curtain of the present invention;
FIG. 6 is a front view of the sealing hinge plate and the rubber curtain of the present invention;
FIG. 7 is a cross-sectional view of the originating rack of the present invention;
FIG. 8 is a schematic front elevation view of an originating reaction frame of the present invention;
fig. 9 is a schematic side elevation view of an originating reaction frame of the present invention;
fig. 10 is a schematic diagram of the shield of the present invention initiating a tunnel entry;
FIG. 11 is a schematic view of the mounting of the negative ring tube piece of the present invention;
wherein:
1-hole door front fertilizer groove 2C 15 plain concrete
3 shield pre-buried steel ring 4 station roof
5 station middle plate 6 station bottom plate
7 station side wall 8 shield machine main unit
9 equipment bridge 101 # trailer
123 # trailer for 112 # trailer
134 # trailer 145 # trailer
15-hole door 16 soil outlet
176 # trailer 18 lifting port
19-hoisting-port gantry crane and 20-discharging-port gantry crane
21 temporary reverse pilot hole 22 temporary upright post
23 screw conveyer 24 reaction frame column
25 reaction frame beam 26 reaction frame diagonal brace
27 reaction frame rear support 28 embedded steel plate
29 sealing folding press plate 30 rubber curtain
31 washer 32 nut
33 stud 34 embedded nut
35 pin sleeve 36 axle pin
37 originating frame reinforced steel 38 originating frame
39 extension line 40 a1 tube sheet
41 a2 tube sheet 42B 1 tube sheet
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1~11, a two components of a whole that can function independently originating station structure of little clear distance double-line tunnel shield, including being located underground station major structure, the last hoist and mount mouth 18 that is provided with hoist equipment usefulness of station major structure and the unearthed mouthful 16 of usefulness that unearths, the entrance to a cave 15 department of station major structure one side is provided with shield and constructs pre-buried steel ring 3, and 15 length direction in proper order of entrance to a cave are assembled shield host computer 8, equipment bridge 9, 1# trailer 10, the entrance to a cave 15 axis outside is provided with accessible extension pipeline 39 and inserts the middle part trailer in 1# trailer 10 rear, is provided with the afterbody trailer behind the accessible hoist and mount mouth 18 hangs down the access middle part trailer subaerially.
The station main structure includes two holes 15, and temporary reverse guide holes 21 are formed at opposite side walls of the station main structure.
The hoisting opening 18 is positioned above one side of the hole 15, and the transverse distance between the soil outlet 16 and the hole 15 meets the requirements of placing the host machine 8 of the shield machine, the equipment bridge 9 and the No. 1 trailer 10.
The lifting port 18 is provided with a lifting port gantry crane 19 for vertical transportation of duct pieces and grease, and the unearthing port 16 is provided with an unearthing port gantry crane 20 for transporting dregs.
C15 plain concrete 2 for ensuring the stability of the stratum of the starting end of the shield is backfilled at the front fertilizer groove 1 of the tunnel portal on the side wall of the main structure of the station.
The shield constructs pre-buried steel ring 3 and is in the same place with station major structure's reinforcing bar connection, the shield constructs pre-buried steel ring 3 outside and is provided with the seal structure that seals up entrance to a cave 15, the main frame 8 clearance of shield structure.
The sealing structure comprises a rubber curtain 30 and a circular blocking piece 46, wherein the rubber curtain 30 and the circular blocking piece 46 are sequentially arranged on the outer side of a shield embedded steel ring 3, one end of a stud 33 penetrates through the blocking piece 46, the rubber curtain 30 and the shield embedded steel ring 3 and is screwed into an embedded nut 34, a nut 32 is screwed at the other end of the stud 33, the blocking piece 46 is hinged with a plurality of sealing folding pressing plates 29 through a pin sleeve 35 and a pin shaft 36, and a gasket 31 is arranged between the blocking piece 46 and the nut 32.
The main structure of the station is provided with a starting frame 38, and the starting frame 38 is provided with a starting frame reinforcing section steel 37 for reinforcing along the length direction.
Be provided with shield tail supporting component among the station major structure, shield tail supporting component includes reaction frame and burden ring section of jurisdiction, two horizontal reaction frame crossbeams 25 between reaction frame stand 24 and the reaction frame stand 24 that the reaction frame includes two vertically, is provided with reaction frame bracing 26 between adjacent reaction frame stand 24, the reaction frame crossbeam 25, and the reaction frame crossbeam 25 back at two reaction frame stands 24 and top is provided with reaction frame back support 27, reaction frame back support 27 links to each other with pre-buried steel sheet 28.
The negative ring pipe piece comprises an A2 pipe piece 41 at the bottom, an A1 pipe piece 40 and an A3 pipe piece 44 are respectively arranged on two sides of the A2 pipe piece 41, a B2 pipe piece 43 is arranged on the A1 pipe piece 40, a B1 pipe piece 42 is arranged on the A3 pipe piece 44, and a K pipe piece 45 is arranged between the B2 pipe piece 43 and the B1 pipe piece 42.
The station main structure comprises a station top plate 4 positioned at the top, a station bottom plate 6 positioned at the bottom, a station middle plate 5 positioned at the middle part and a station side wall 7.
The opening 15, the shield pre-buried steel ring 3 and the temporary reverse pilot tunnel 21 are all located in the station side wall 7.
The middle trailer comprises a 2# trailer 11, a 3# trailer 12, a 4# trailer 13 and a 5# trailer 14, and the 2# trailer 11, the 3# trailer 12, the 4# trailer 13 and the 5# trailer 14 are parallel to the shield machine host 8, the equipment bridge 9 and the 1# trailer 10.
The trailer tail comprises a 6# trailer 17.
Preferably, the station main structure has a space in the transverse width direction, supporting equipment and facilities after shield launching can be placed, and the distance in the length direction does not meet the requirement of the conventional launching length and is solved by adopting the underground excavation construction temporary reverse pilot tunnel 21.
The 2# trailer 11, the 3# trailer 12, the 4# trailer 13 and the 5# trailer 14 are positioned at one side close to the side wall.
As shown in fig. 2 and 3, the main structure of the station includes a shield right line split starting device and a shield left line split starting device, and the shield right line split starting device and the shield left line split starting device have the same and symmetrical structure.
The two unearthing ports 16 are respectively provided for the shield right line split starting equipment and the shield left line split starting equipment respectively.
The number of the hoisting ports 18 is four, and two hoisting ports are respectively arranged for the shield right line split starting equipment and the shield left line split starting equipment.
The station main body structure is further provided with a temporary upright post 22, and the temporary upright post 22 meets the walking requirement of a gantry crane.
The length of the rubber curtain 30 is greater than the length of the sealing folding pressing plate 29 and the blocking piece 46. Rubber curtain 30
The rubber curtain 30 is turned up and then contacts with the main machine 8 of the shield machine, and the sealing folding pressing plate 29 presses the rubber curtain 30.
The shield machine host 8 comprises a cutter head, a front shield, a middle shield, a rear shield and a spiral conveyor 23.
The corresponding starting method of the utility model comprises the following steps:
bus station main structure with initial layout
The method comprises the steps that shield launching is carried out in a split launching mode, a tunnel portal 15 of a launching well needs to be capable of placing a host machine 8, an equipment bridge 9 and a No. 1 trailer 10 at a distance from a soil outlet 16, a No. 2 trailer 11, a No. 3 trailer 12, a No. 4 trailer 13 and a No. 5 trailer 14 are placed in a space close to one side of a side wall, the No. 1 trailer 10 and the No. 2 trailer 11 can be connected through an extension pipeline 39, and a No. 6 trailer 17 is placed on the ground for standby;
ii, backfilling and reinforcing the starting end head
After the construction of the main structure of the station is finished, C15 plain concrete 2 is backfilled between front fertilizer grooves 1 of the tunnel portal at the initial end of the shield;
iii temporary sealing of installation portal
In the construction process of the side wall at the initiating end, a shield embedded steel ring 3 is arranged at the tunnel portal 15, and the shield embedded steel ring 3 needs to be tightly connected with the structural steel bars of the side wall; before the shield formally starts, a sealing folding pressing plate 29 and a rubber curtain 30 are arranged at the portal 15;
iv. installation starting frame
The starting frame 38 is installed before the shield machine is assembled, the two sides of the starting frame 38 are reinforced by the starting frame reinforcing section steel 37, and the starting frame reinforcing section steel 37 is symmetrically reinforced in the reinforcing process to avoid dislocation of the starting frame 38;
v. assembling and debugging the shield
The split starting is respectively hoisted into each starting device of the shield body according to the left and right lines, and the shield machine host 8 tunnels forwards for a certain distance and then connects the 2# trailer 11, the 3# trailer 12, the 4# trailer 13 and the 5# trailer 14 which are positioned at the side to the 1# trailer 10;
vi.installation of reaction frame
In order to ensure that the reaction frame provides enough reaction force for shield starting and ensure the stability of the reaction frame, steel plates 28 are embedded according to the support legs of the reaction frame and the rear support mounting positions of the reaction frame during the construction of a station bottom plate, and the reaction frame is subsequently mounted;
vii installation of negative ring canal piece
Assembling the negative ring canal pieces according to the through-seam pipe pieces, pushing the assembled negative ring canal pieces out of the shield tail, and starting assembling the next ring canal piece;
shield starting trial heading
The cutter head of the main machine 8 of the shield machine is pushed into the tunnel portal 15, the front of the tunnel portal 15 is blocked, the rubber curtain 30 is attached to the outside of the shield machine, the cutter head cuts the soil body, the fixed length distance for starting tunneling is taken as a trial tunneling section, the negative ring duct piece is removed after the tunneling of the section is completed, and the rear matched 2 # trailer 11, 3# trailer 12, 4 # trailer 13, 5# trailer 14 and 6# trailer 17 are all tunneled.
And (3) structurally arranging a temporary soil outlet 16 and a lifting port 18 on the main body of the station in the step i, lifting a 6# trailer 17 into the main body for integral connection, and arranging a temporary upright column 22 in the main body of the station to meet the walking requirement of a gantry crane.
And (5) in the step i, the tail end of the main body structure of the station is dug in an underground way to form a temporary reverse pilot tunnel 21 so as to meet the horizontal transportation requirement of the shield.
In the step iv, a shield starting attitude spatial position is determined according to a tunnel design axis, then the spatial position of the starting frame 38 is reversely deduced, and the spatial position of the starting frame 38 is adjusted by comprehensively considering factors such as net size, diameter and portal central position of the starting portal 15, geological conditions, a negative ring pipe piece installation form and the like.
The assembly sequence of step v is: 2 # trailer 11, 3# trailer 12, 4 # trailer 13, 5# trailer 14 → 1# trailer 10 → equipment bridge 9 → screw conveyor 23 is run into the well → middle shield → front shield → cutterhead → shield tail is run into the well → screw conveyor 23 is installed → equipment bridge 9 is connected with the main engine → hydraulic, fluid and electric lines are installed.
And debugging in the step v comprises no-load debugging and load debugging.
In the step iii, the rubber curtain 30 and the annular baffle 46 are arranged on the outer side of the shield embedded steel ring 3, one end of the stud 33 penetrates through the baffle 46, the rubber curtain 30 and the shield embedded steel ring 3 and is screwed into the embedded nut 34, the other end of the stud 33 is screwed with the nut 32, the baffle 46 is hinged with a plurality of sealing folding pressing plates 29 through a pin sleeve 35 and a pin shaft 36, and a gasket 31 is arranged between the baffle 46 and the nut 32.
And vi, the reaction frame comprises two vertical reaction frame upright columns 24 and two transverse reaction frame cross beams 25 between the reaction frame upright columns 24, reaction frame inclined struts 26 are arranged between the adjacent reaction frame upright columns 24 and the reaction frame cross beams 25, reaction frame rear supports 27 are arranged on the two reaction frame upright columns 24 and the backs of the reaction frame cross beams 25 at the tops, and the reaction frame rear supports 27 are connected with the embedded steel plates 28.
The assembling sequence of the negative ring duct pieces in the step vii is that the assembling position of an A2 duct piece 42 is measured and positioned, an A2 duct piece 41 is placed on a shield tail welding channel steel according to the measuring position, an A1 duct piece 40 and an A3 duct piece 44 are assembled in sequence, duct piece connecting bolts are fastened in time when the duct pieces are assembled, a B1 duct piece 42 and a B2 duct piece 43 are assembled, a B1 duct piece 42 and a B2 duct piece 43 are welded and fixed on a shield tail by L steel plates at positions close to a shield tail brush, the duct piece connecting bolts are fastened in time, when a K duct piece 45 is assembled, the thrust of an assembling machine oil cylinder is not too large, the B1 duct piece 42 and the B2 duct piece 43 are prevented from being fixed and then detached by L steel plates, after the assembling of the duct pieces is completed, the duct piece bolts are fastened in time, and the L steel plates are cut.
The utility model discloses a carry out reasonable spatial layout to the starting station structure well, take the interim reverse undercut pilot tunnel of construction to initiate with supplementary components of a whole that can function independently, install the shield in proper order and initiate the frame, the reaction frame, the burden ring section of jurisdiction, the realization leads to whole components of a whole that can function independently of starting the tunnel shield under the difficult condition of whole initiation to initiate the construction, through engineering practice verification, this components of a whole that can function independently originating method, it is little to have construction cross influence, little to all ring edge borders influence, slow down time limit for a project pressure, advantages such as safe and reliable, it is applicable in the not enough engineering of subway shield starting station end well length.
Claims (10)
1. The utility model provides a two components of a whole that can function independently station structure that little clear distance double line tunnel shield constructs, is including being located the station major structure in underground, its characterized in that: station major structure is last to be provided with hoist and mount mouth (18) that hoist equipment used and unearthed mouthful (16) of usefulness, entrance to a cave (15) department of station major structure one side is provided with shield structure pre-buried steel ring (3), and entrance to a cave (15) length direction is assembled shield structure host computer (8), equipment bridge (9), 1# trailer (10) in proper order, entrance to a cave (15) axis outside is provided with accessible extension pipeline (39) and inserts the middle part trailer at 1# trailer (10) rear, is provided with subaerial accessible hoist and mount mouth (18) and hangs the afterbody trailer behind the lower income middle part trailer.
2. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 1, wherein: the station main structure comprises two holes (15), and temporary reverse guide holes (21) are formed at the side walls of the opposite sides of the station main structure.
3. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 1, wherein: the hoisting opening (18) is located above one side of the opening (15), and the transverse distance between the soil outlet (16) and the opening (15) meets the requirements of placing a host machine (8) of the shield machine, an equipment bridge (9) and a No. 1 trailer (10).
4. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 1, wherein: the device is characterized in that a hoisting port gantry crane (19) for vertically transporting the duct piece and the grease is arranged on the hoisting port (18), and a unearthing port gantry crane (20) for transporting the dregs is arranged on the unearthing port (16).
5. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 1, wherein: c15 plain concrete (2) for ensuring the stability of the stratum of the starting end of the shield is backfilled at the front fertilizer groove (1) of the tunnel portal on the side wall of the main structure of the station.
6. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 1, wherein: the shield constructs pre-buried steel ring (3) and is in the same place with station major structure's steel bar connection, the shield constructs pre-buried steel ring (3) outside and is provided with and carries out sealed structure sealed to entrance to a cave (15), shield structure host computer (8) clearance.
7. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 6, wherein: the sealing structure comprises a rubber curtain (30) and a circular baffle plate (46), wherein the rubber curtain (30) is sequentially arranged on the outer side of a shield embedded steel ring (3), one end of a stud bolt (33) penetrates through the baffle plate (46), the rubber curtain (30) and the shield embedded steel ring (3) to be screwed into an embedded nut (34), a nut (32) is screwed at the other end of the stud bolt (33), the baffle plate (46) is hinged to a plurality of sealing folding pressing plates (29) through a pin bush (35) and a pin shaft (36), and a gasket (31) is arranged between the baffle plate (46) and the nut (32).
8. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 1, wherein: the station main body structure is provided with an originating frame (38), and originating frame reinforcing section steel (37) for reinforcing along the length direction is arranged on the originating frame (38).
9. The double-molecular starting station structure of the small-clearance double-line tunnel shield according to claim 1, wherein: be provided with shield tail supporting component among the station major structure, shield tail supporting component includes reaction frame and burden ring section of jurisdiction, two horizontal reaction frame crossbeams (25) between reaction frame stand (24) and reaction frame stand (24) that the reaction frame includes two vertical reaction frame stands (24), are provided with reaction frame bracing (26) between adjacent reaction frame stand (24), reaction frame crossbeam (25), and reaction frame crossbeam (25) back at two reaction frame stands (24) and top is provided with reaction frame back support (27), reaction frame back support (27) link to each other with pre-buried steel sheet (28).
10. The double-split originating station structure of the small-clearance double-line tunnel shield according to claim 9, wherein: the negative ring pipe piece comprises an A2 pipe piece (41) at the bottom, wherein an A1 pipe piece (40) and an A3 pipe piece (44) are respectively arranged on two sides of the A2 pipe piece (41), a B2 pipe piece (43) is arranged on the A1 pipe piece (40), a B1 pipe piece (42) is arranged on the A3 pipe piece (44), and a K pipe piece (45) is arranged between the B2 pipe piece (43) and the B1 pipe piece (42).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921743820.4U CN210977480U (en) | 2019-10-17 | 2019-10-17 | Double-split originating station structure of small-clear-distance double-line tunnel shield |
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| CN201921743820.4U CN210977480U (en) | 2019-10-17 | 2019-10-17 | Double-split originating station structure of small-clear-distance double-line tunnel shield |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748349A (en) * | 2019-10-17 | 2020-02-04 | 中铁隧道集团一处有限公司 | Double-molecular originating method for small-clear-distance double-line tunnel shield |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748349A (en) * | 2019-10-17 | 2020-02-04 | 中铁隧道集团一处有限公司 | Double-molecular originating method for small-clear-distance double-line tunnel shield |
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