CN219953345U - Large-section shield tunnel starting system - Google Patents
Large-section shield tunnel starting system Download PDFInfo
- Publication number
- CN219953345U CN219953345U CN202321051023.6U CN202321051023U CN219953345U CN 219953345 U CN219953345 U CN 219953345U CN 202321051023 U CN202321051023 U CN 202321051023U CN 219953345 U CN219953345 U CN 219953345U
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- steel ring
- curtain cloth
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- base
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 97
- 239000010959 steel Substances 0.000 claims abstract description 97
- 238000007493 shaping process Methods 0.000 claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 239000004744 fabric Substances 0.000 claims description 61
- 238000003466 welding Methods 0.000 claims description 13
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 5
- 230000005641 tunneling Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010063659 Aversion Diseases 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The utility model relates to a large-section shield tunnel originating system, which comprises: the device comprises an originating base, guide steel rails, a shaping supporting rib, a shaping reaction frame, a concrete portal, a portal sealing steel ring, an inner leaf spring, a rubber curtain and an outer pressing plate. The beneficial effects of the utility model are as follows: the shaping supporting ribs are poured on the starting base, so that stable and reliable support is provided for the guide rail, and meanwhile, the shaping supporting ribs are used as a supporting structure of a top template of the starting base, so that the shaping precision of the starting base is ensured; the horizontal reaction frame of the shield machine adopts a shaping structure, and after the shaping reaction frame is assembled into a plurality of independent units on the ground, the independent units form a whole in a working well through a sleeve and a bolt, and the horizontal reaction frame has the advantages of simple and reliable structure and strong bearing capacity; the sealing steel ring of the tunnel portal is supported on the positioning steel ring, and the positioning steel ring is further provided with a locking bolt, so that the position of the sealing steel ring of the tunnel portal can be rapidly adjusted and temporarily fixed, and the installation difficulty of the sealing steel ring of the tunnel portal is reduced.
Description
Technical Field
The utility model relates to the field of tunnel construction, in particular to a large-section shield tunnel starting system.
Background
When a large-section shield tunnel is constructed, an auxiliary facility of the shield machine needs to be established in an originating working well so as to ensure that the shield machine can smoothly excavate a tunnel. When the shield tunneling machine digs a hole, the shield tunneling machine is mainly supported on the concrete base, and then the horizontal counter force is provided for tunneling forwards by the counter force frame, so that the construction quality of the concrete base and the stability of the counter force frame are directly related to the construction quality of a tunnel. The concrete base is usually arc-shaped structure, upper berth rail, because the borehole operation space is limited, and cast-in-place concrete arc curved surface shaping is difficult, is difficult to guarantee the construction precision of curved surface in the work progress generally, and shield constructs the machine dead weight great, and the jacking in-process is easy to crush the rail and is led to its emergence aversion. The reaction frame is usually processed in a field welding mode, and then the bottom is poured in the concrete base, however, because the field operation space is limited, the welding precision and the field installation precision of the reaction frame have larger deviation, and the pushing precision of the shield machine is easily influenced.
In addition, when the shield machine enters a tunnel, a gap between the tunnel portal and the shield machine needs to be sealed, and a circle of rubber curtain cloth is arranged on the outer side of the tunnel portal by conventional sealing measures, but the rubber curtain cloth is easy to bend due to the large size, so that the situations of poor sealing, slurry leakage and the like are caused.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a large-section shield tunnel starting system.
The large-section shield tunnel starting system comprises a starting base, a guide rail, a shaping supporting rib, a shaping reaction frame, a concrete portal, a portal sealing steel ring, an inner leaf spring, a rubber curtain and an outer pressing plate;
the surface radian of the shaping supporting rib is consistent with that of the starting base, the shaping supporting rib is poured into the starting base, and the guide rail is supported on the shaping supporting rib;
the finalized reaction frame comprises a base, a vertical support, an upper cross beam, a lower cross beam and an inclined support, wherein the base is arranged in the starting base;
the concrete portal is poured with a portal steel ring, a positioning steel ring is arranged on the portal steel ring, and a portal sealing steel ring is sleeved on the positioning steel ring and is welded and fixed with the portal steel ring in full;
the tunnel portal sealing steel ring is provided with a curtain cloth mounting ring, an inner plate spring, a rubber curtain cloth and an outer pressing plate are fixed on the curtain cloth mounting ring, the inner plate spring is fixed on the inner side of the curtain cloth mounting ring and props against the rubber curtain cloth, the rubber curtain cloth and the outer pressing plate are fixed on the outer side of the curtain cloth mounting ring, and the outer pressing plate is attached to the outer side of the rubber curtain cloth;
the sealing steel ring of the tunnel portal is provided with a secondary grouting pipe.
As preferable: the bottom of the shaping supporting rib is provided with a positioning groove which is clamped on the base steel bar and fixed by spot welding; the side of the starting base is provided with a rigid side die, the top of the starting base is provided with a flexible top die, the flexible top die is fixed on a shaping supporting rib by using a fixing bolt, the shaping supporting rib supports the flexible top die, and the flexible top die is provided with a pouring hole for pouring the starting base from top to bottom.
As preferable: the bases of the shaping reaction frames are fixed through connecting reinforcing steel bars to form a whole, and all parts of the shaping reaction frames are connected through welding or fastening bolts; the upper ends and the lower ends of the two vertical supports are respectively connected and fixed through an upper cross beam and a lower cross beam, a butt joint sleeve is arranged at the bottom of the vertical supports and is inserted on the base, the upper ends of the diagonal supports are supported on the vertical supports, and the butt joint sleeves are arranged at the lower ends of the vertical supports and the diagonal supports and are inserted on the base; the connection part of the vertical support and the upper and lower beams is provided with an arc stiffening block, and a stiffening rod is arranged between the inclined supports.
As preferable: and stiffening angle steel is respectively arranged at two sides of the guide steel rail and is respectively welded with the finalized supporting rib and the stiffening angle steel.
As preferable: the diameter of the positioning steel ring is smaller than that of the sealing steel ring of the tunnel portal; the positioning steel ring is provided with a locking bolt and is fixedly connected with the sealing steel ring of the tunnel portal through the locking bolt.
As preferable: and a grouting pipe for injecting cement slurry to the space between the lining and the tunnel portal is further arranged on the tunnel portal steel ring.
As preferable: the outer side of the sealing steel ring of the tunnel portal is provided with a triangular stiffening plate, and the triangular stiffening plate is fixed with the steel ring of the tunnel portal through spot welding; the tunnel portal sealing steel ring is provided with two curtain cloth mounting rings, and the secondary grouting pipe is arranged between the two curtain cloth mounting rings.
As preferable: the upper end of the inner leaf spring is fixed on the curtain cloth mounting ring, the lower end of the inner leaf spring props against the rubber curtain cloth, and the contact part of the lower end of the inner leaf spring and the rubber curtain cloth is a smooth surface;
the outer side pressing plate is divided into a fixed section and a movable section, the fixed section is fixed on the curtain cloth mounting ring, the movable section is attached to the rubber curtain cloth, the fixed section is hinged with the movable section through a pin shaft, a torsional spring clamping groove is formed in the hinged position of the fixed section and the movable section, a torsional spring is arranged in the torsional spring clamping groove, and the rubber curtain cloth is vertically clamped between the inner side plate spring and the outer side pressing plate.
The beneficial effects of the utility model are as follows:
1) The shaping support rib is poured on the starting base, so that stable and reliable support is provided for the guide rail, and meanwhile, the shaping precision of the starting base is ensured as a support structure of a top template of the starting base.
2) The horizontal reaction frame of the shield machine adopts a shaping structure, and after the shaping reaction frame is assembled into a plurality of independent units on the ground, the whole is formed in the working well through the sleeve and the bolt, and the structure is simple and reliable and has strong bearing capacity.
3) The sealing steel ring of the tunnel portal is supported on the positioning steel ring, and the positioning steel ring is further provided with a locking bolt, so that the position of the sealing steel ring of the tunnel portal can be rapidly adjusted and temporarily fixed, and the installation difficulty of the sealing steel ring of the tunnel portal is reduced.
4) The rubber curtain cloth is arranged on the sealing steel ring of the tunnel portal in a tiling mode, so that the conditions of pulling, elliptic variation, breakage and the like of the rubber curtain cloth during vertical placement can be avoided, and the installation difficulty is reduced.
5) The two sides of the rubber curtain cloth are respectively provided with the inner plate spring and the outer pressing plate, so that the situation that the rubber curtain cloth is inclined is avoided, and meanwhile, the shield tunneling machine is not influenced to pass through the rubber curtain cloth to enter the tunnel.
Drawings
FIG. 1 is a side view of a large section shield tunnel initiation system;
FIG. 2 is a top view of a large section shield tunnel initiation system;
FIG. 3 is a schematic diagram of a tunnel initiation portal structure;
FIG. 4 is a schematic view of the structure of the tunnel portal steel ring;
FIG. 5 is a schematic view of a portal sealing structure;
FIG. 6 is a half cross-sectional view of the three-dimensional structure of the tunnel portal steel ring;
FIG. 7 is a half cross-sectional view of a three-dimensional structure of a seal steel ring;
FIG. 8 is a side view of an outboard platen;
FIG. 9 is a schematic view of the three-dimensional structure of the outer platen;
FIG. 10 is a schematic view of the outboard platen structure disassembled;
FIG. 11 is a view of the torsion spring installation (node A in FIG. 10);
FIG. 12 is a schematic view of the three-dimensional structure of the starting base and reaction frame;
FIG. 13 is a schematic view of a three-dimensional structure of a patterned support rib;
FIG. 14 is a schematic view of a modular support rib placement;
FIG. 15 is a schematic diagram of an originating base form;
FIG. 16 is a schematic view of the demolding of the originating base and the placement of the patterned support ribs in place;
FIG. 17 is a schematic view of a three-dimensional structure of a patterned reaction frame;
FIG. 18 is a schematic view of a vertical support and upper and lower cross beam splice;
FIG. 19 is a schematic view of a base structure;
FIG. 20 is a schematic view of a three-dimensional structure of a diagonal support;
FIG. 21 is a schematic view of a pre-buried seating structure of a base;
fig. 22 is a schematic view of a modular reaction frame assembly in place.
The marks in the figure: the steel structure comprises the following components of an initial base, a 12-guiding steel rail, a 13-stiffening angle iron, a 21-shaping supporting rib, a 22-positioning groove, a 23-base steel bar, a 24-flexible top mold, a 25-rigid side mold, a 26-fixing bolt, a 27-pouring hole, a 3-shaping reaction frame, a 31-base, a 32-connecting steel bar, a 33-vertical support, a 34-upper beam, a 35-lower beam, a 36-arc-shaped stiffening block, a 37-inclined support, a 38-stiffening rod, a 39-butt sleeve, a 310-fastening bolt, a 41-concrete portal, a 42-portal steel ring, a 43-grouting pipe, a 44-positioning steel ring, a 45-locking bolt, a 51-portal sealing steel ring, a 52-triangular stiffening plate, a 53-secondary grouting pipe, a 54-cord fabric mounting ring, a 55-inner plate spring, a 56-rubber cord fabric, a 57-outer pressing plate, a 58-fixing section, a 59-movable section, a 510-pin roll, a 511-torsion spring and a 512-torsion spring clamping groove.
Detailed Description
The utility model is further described below with reference to examples. The following examples are presented only to aid in the understanding of the utility model. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present utility model without departing from the principles of the utility model, and such modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
As an example, as shown in fig. 1 to 22, the large-section shield tunnel initiation system includes an initiation base 11, guide rails 12, a shaping support rib 21, a shaping reaction frame 3, a concrete tunnel 41, a tunnel sealing steel ring 51, an inner leaf spring 55, a rubber curtain cloth 56, an outer pressure plate 57, and the like.
The radian of the shaping supporting rib 21 is consistent with that of the surface of the starting base 11, the shaping supporting rib 21 is poured into the starting base 11, and the guide rail support 12 is welded and fixed on the shaping supporting rib 21; the bottom of the shaping supporting rib 21 is provided with a positioning groove 22, and the positioning groove 22 is clamped on a base steel bar 23 and fixed by spot welding during installation; the side sets up rigidity side form 25 when originating base 11 pours, and the top sets up flexible top form 24, and flexible top form 24 uses fixing bolt 26 to fix on the shaping support rib 21, and shaping support rib 21 is as the support of flexible top form 24, has guaranteed the shaping precision of originating base 11 arc surface effectively, is equipped with pouring hole 27 on the flexible top form 24, conveniently carries out from the top down and pours the concrete of originating base 11.
The finalized reaction frame 3 comprises a base 31, a vertical support 33, an upper beam 34, a lower beam 35, an inclined support 37 and the like, all the components are connected through welding or fastening bolts 310, and the base 31 is integrally poured in the starting base 11; the bases 31 of the finalized reaction frames 3 are fixed together through connecting steel bars 32, so that the displacement of the bases 31 during pouring of the initial base 11 is avoided; the upper and lower ends of the two vertical supports 33 are respectively connected and fixed through an upper cross beam 34 and a lower cross beam 35, a butt joint sleeve 39 is arranged at the bottom of the vertical supports 33 and is inserted on the base 31, the upper ends of the inclined supports 37 are supported on the vertical supports 33, and the butt joint sleeves 39 are arranged at the lower ends of the vertical supports 33 and the inclined supports 37 and are inserted on the base 31; the connection part of the vertical support 33, the upper cross beam 34 and the lower cross beam 35 is provided with an arc stiffening block 36, and a crossed stiffening rod 38 is arranged between the inclined supports 37, so that the stability of the whole finalized reaction frame 3 is improved.
The both sides of direction rail 12 are equipped with the angle steel 13 of putting more energy into respectively, and the angle steel 13 of putting more energy into respectively with the welding of shaping support rib 21 and angle steel 13 of putting more energy into, promote the bearing capacity and the stability of direction rail 12 through setting up angle steel 13 of putting energy into, avoid breaking away from on the shaping support rib 21.
The concrete portal 41 is poured with a portal steel ring 42, the portal steel ring 42 is provided with a positioning steel ring 44, and a portal sealing steel ring 51 is sleeved on the positioning steel ring 44 and is welded with the portal steel ring 42 in full; the diameter of the positioning steel ring 44 is smaller than that of the portal sealing steel ring 51, so that the sleeving difficulty of the portal sealing steel ring 51 is reduced; the positioning steel ring 44 is provided with a locking bolt 45, and the position of the sealing steel ring 51 of the tunnel portal is adjusted and the sealing steel ring 51 of the tunnel portal is quickly fixed by screwing the locking bolt 45. The tunnel portal steel ring 42 is also provided with a grouting pipe 43 for injecting cement slurry for blocking between the lining and the tunnel portal, and the cement slurry for blocking is injected between the lining and the tunnel portal through the grouting pipe 43 after the shield tunneling machine enters the tunnel.
The outside of the tunnel portal sealing steel ring 51 is provided with a plurality of triangular stiffening plates 52, and the triangular stiffening plates 52 are fixed with the tunnel portal steel ring 42 by spot welding, so that the connection strength of the tunnel portal sealing steel ring 51 and the tunnel portal steel ring 42 can be improved, the tunnel portal sealing steel ring 51 can be temporarily fixed, and then the full welding operation of the tunnel portal sealing steel ring 51 and the tunnel portal steel ring 42 is carried out; the secondary grouting pipe 53 is arranged between the two curtain cloth mounting rings 54, so that cement slurry can be conveniently injected between the rubber curtain cloth 56 in the later period for sealing operation, and the sealing effect of the tunnel portal is improved.
The inner plate spring 55, the rubber curtain cloth 56 and the outer pressing plate 57 are fixed on the curtain cloth mounting ring 54 of the tunnel portal sealing steel ring 51, the inner plate spring 55 is fixed on the inner side of the curtain cloth mounting ring 54 and props against the rubber curtain cloth 56, the rubber curtain cloth 56 and the outer pressing plate 57 are fixed on the outer side of the curtain cloth mounting ring 54, and the outer pressing plate 57 is clung to the outer side of the rubber curtain cloth 56; the inner plate spring 55 is of a flexible strip-shaped structure, the upper end of the inner plate spring is fixed on the curtain cloth mounting ring 54, the lower end of the inner plate spring props against the rubber curtain cloth 56, the curtain cloth is prevented from tilting inwards, and the contact part of the lower end and the rubber curtain cloth 56 is a smooth surface, so that the rubber curtain cloth 56 is prevented from being scratched; the outside clamp plate 57 is divided into a fixed section 58 and a movable section 59, the fixed section 58 is fixed on the curtain cloth mounting ring 54, the movable section 59 is clung to the rubber curtain cloth 56, the fixed section 58 is hinged with the movable section 59 through a pin shaft 510, a torsion spring clamping groove 512 is arranged at the hinged position of the two sections, a torsion spring 511 is arranged in the torsion spring clamping groove, the movable section 59 is kept in a vertical state by arranging the torsion spring 511, and therefore the rubber curtain cloth 56 is clamped between the inside plate spring 55 and the outside clamp plate 57 to keep in a vertical state, and the rubber curtain cloth 56 is prevented from toppling over.
The tunnel portal sealing steel ring 51 is provided with a secondary grouting pipe 53.
Claims (8)
1. A large-section shield tunnel starting system comprises a starting base (11), guide rails (12), shaping supporting ribs (21), shaping reaction frames (3), a concrete tunnel portal (41), a tunnel portal sealing steel ring (51), an inner plate spring (55), rubber curtain cloth (56) and an outer pressing plate (57); the method is characterized in that:
the surface radian of the shaping supporting rib (21) is consistent with that of the starting base (11), the shaping supporting rib (21) is poured into the starting base (11), and the guide rail (12) is supported on the shaping supporting rib (21);
the finalized reaction frame (3) comprises a base (31), a vertical support (33), an upper cross beam (34), a lower cross beam (35) and an inclined support (37), wherein the base (31) is arranged in the starting base (11);
a cavity steel ring (42) is poured on the concrete cavity (41), a positioning steel ring (44) is arranged on the cavity steel ring (42), and a cavity sealing steel ring (51) is sleeved on the positioning steel ring (44) and is welded and fixed with the cavity steel ring (42) in a full mode;
the tunnel portal sealing steel ring (51) is provided with a curtain cloth mounting ring (54), an inner plate spring (55), a rubber curtain cloth (56) and an outer pressing plate (57) are fixed on the curtain cloth mounting ring (54), the inner plate spring (55) is fixed on the inner side of the curtain cloth mounting ring (54) and props against the rubber curtain cloth (56), the rubber curtain cloth (56) and the outer pressing plate (57) are fixed on the outer side of the curtain cloth mounting ring (54), and the outer pressing plate (57) is attached to the outer side of the rubber curtain cloth (56);
the tunnel portal sealing steel ring (51) is provided with a secondary grouting pipe (53).
2. The large-section shield tunnel starting system according to claim 1, wherein positioning grooves (22) are formed in the bottoms of the shaping supporting ribs (21), and the positioning grooves (22) are clamped on base steel bars (23) and fixed by spot welding; the side of the starting base (11) is provided with a rigid side die (25), the top of the starting base is provided with a flexible top die (24), the flexible top die (24) is fixed on the shaping supporting rib (21) by using a fixing bolt (26), the shaping supporting rib (21) supports the flexible top die (24), and the flexible top die (24) is provided with a pouring hole (27) for pouring the starting base (11) from top to bottom.
3. The large-section shield tunnel starting system according to claim 1, wherein the bases (31) of the shaping reaction frames (3) are fixed together through connecting steel bars (32), and all parts of the shaping reaction frames (3) are connected through welding or fastening bolts (310); the upper ends and the lower ends of the two vertical supports (33) are respectively connected and fixed through an upper cross beam (34) and a lower cross beam (35), a butt joint sleeve (39) is arranged at the bottom of the vertical supports (33) and is inserted on the base (31), the upper ends of the inclined supports (37) are supported on the vertical supports (33), and the butt joint sleeve (39) is arranged at the lower ends of the vertical supports (33) and the inclined supports (37) and is inserted on the base (31); an arc stiffening block (36) is arranged at the joint of the vertical support (33) and the upper beam (34) and the lower beam (35), and a stiffening rod (38) is arranged between the inclined supports (37).
4. The large-section shield tunnel starting system according to claim 1, wherein stiffening angle steels (13) are respectively arranged on two sides of the guide steel rail (12), and the stiffening angle steels (13) are respectively welded with the shaping supporting ribs (21) and the stiffening angle steels (13).
5. The large-section shield tunnel initiation system according to claim 1, characterized in that the diameter of the positioning steel ring (44) is smaller than the diameter of the portal sealing steel ring (51); the positioning steel ring (44) is provided with a locking bolt (45), and the positioning steel ring (44) is fixedly connected with the sealing steel ring (51) of the tunnel portal through the locking bolt (45).
6. The large-section shield tunnel starting system according to claim 1, wherein a grouting pipe (43) for grouting cement blocking between the lining and the tunnel portal is further arranged on the tunnel portal steel ring (42).
7. The large-section shield tunnel starting system according to claim 1, wherein a triangular stiffening plate (52) is arranged on the outer side of the tunnel portal sealing steel ring (51), and the triangular stiffening plate (52) is fixed with the tunnel portal steel ring (42) through spot welding; the tunnel portal sealing steel ring (51) is provided with two curtain cloth mounting rings (54), and the secondary grouting pipe (53) is arranged between the two curtain cloth mounting rings (54).
8. The large-section shield tunnel starting system according to claim 1, wherein the inner plate spring (55) is of a flexible strip structure, the upper end of the inner plate spring (55) is fixed on the curtain cloth mounting ring (54), the lower end of the inner plate spring is propped against the rubber curtain cloth (56), and the contact part of the lower end of the inner plate spring (55) and the rubber curtain cloth (56) is a smooth surface;
the outside clamp plate (57) divide into fixed section (58) and movable section (59), fixed section (58) are fixed on curtain cloth collar (54), movable section (59) laminating rubber curtain cloth (56), fixed section (58) are articulated through round pin axle (510) with movable section (59), the articulated department of fixed section (58) and movable section (59) is equipped with torsional spring draw-in groove (512), be equipped with torsional spring (511) in torsional spring draw-in groove (512), rubber curtain cloth (56) vertical clamp inboard leaf spring (55) and outside clamp plate (57).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321051023.6U CN219953345U (en) | 2023-04-27 | 2023-04-27 | Large-section shield tunnel starting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321051023.6U CN219953345U (en) | 2023-04-27 | 2023-04-27 | Large-section shield tunnel starting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219953345U true CN219953345U (en) | 2023-11-03 |
Family
ID=88543650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321051023.6U Active CN219953345U (en) | 2023-04-27 | 2023-04-27 | Large-section shield tunnel starting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219953345U (en) |
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2023
- 2023-04-27 CN CN202321051023.6U patent/CN219953345U/en active Active
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