CN113775356A - Shield constructs underground butt joint section secondary lining structure - Google Patents
Shield constructs underground butt joint section secondary lining structure Download PDFInfo
- Publication number
- CN113775356A CN113775356A CN202111021952.8A CN202111021952A CN113775356A CN 113775356 A CN113775356 A CN 113775356A CN 202111021952 A CN202111021952 A CN 202111021952A CN 113775356 A CN113775356 A CN 113775356A
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- shield
- reinforced concrete
- butt joint
- joint section
- steel
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- 210000001503 joint Anatomy 0.000 title claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 111
- 239000010959 steel Substances 0.000 claims abstract description 111
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 56
- 238000005260 corrosion Methods 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 14
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004567 concrete Substances 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 10
- 238000003032 molecular docking Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000005641 tunneling Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
Abstract
The invention provides a secondary lining structure of a shield underground butt joint section, which comprises an annular special reinforced concrete segment, wherein a plurality of embedded steel plates and embedded bolts are uniformly arranged on the end surface of the special reinforced concrete segment along the circumferential direction; a shield shell is arranged outside the special reinforced concrete segment; the shield shell and the special reinforced concrete segment are coaxially arranged; the steel plate is a triangular steel plate; the first right-angle surface of the triangular steel plate is welded with the embedded steel plate, and the second right-angle surface of the triangular steel plate is welded with the inner wall of the shield shell; the steel groove reinforcing piece is also included; the steel groove reinforcing member is anchored on the inner wall of the reinforced concrete segment through the assembling head; the special reinforced concrete segments are connected with each other pairwise through steel pipe segments. By applying the technical scheme, the problems of loose duct pieces, tunnel water leakage, corrosion of the shell of the shield machine and the like after the jack at the butt joint section is unloaded can be solved.
Description
Technical Field
The invention relates to the field of shield construction, in particular to a secondary lining structure of a shield underground butt joint section.
Background
With the vigorous development of rail transit engineering in China, the shield construction is more and more perfect, and the frequency of tunnels crossing rivers and lakes is increasing day by day. The shield method is a fully mechanical construction method in the construction of the underground excavation method. The shield machine is propelled in the ground, and the surrounding rocks around the shield machine are supported by the shield shell and the duct pieces to prevent collapse into the tunnel. And simultaneously, excavating the soil body in front of the excavation surface by using a cutting device, conveying the soil out of the hole by using an excavating machine, jacking the soil body by pressing at the rear part by using a jack, and assembling precast concrete segments to form the mechanical construction method of the tunnel structure. The shield machine is a construction machine and is also a powerful temporary supporting structure. The shield machine looks like a large steel pipe machine, slightly larger than the tunnel part, and is designed to withstand outward water pressure and formation pressure. It comprises three parts: a front incision ring, a middle support ring and a rear shield tail. Under the conditions of large span, short working period and complex geological conditions, the shield ground-to-ground docking technology of 'opposite propulsion, underground docking and shell abandonment and disintegration' becomes a new development trend. The shield butt joint technology has extremely high requirements on the aspects of butt joint precision, tunnel water leakage, structural safety and the like, and the problems of instability of a tunnel face, relaxation of lining stress and the like are easily caused due to unloading of thrust in the disassembly process, so that major accidents can be caused by carelessness. Therefore, before the secondary lining is applied to the butt joint section, the shield tail pipe piece needs to be reinforced. In addition, engineering practices show that the existing shield pair stage secondary lining structure adopting cast-in-place concrete has certain defects in the design or construction process, and the problem of water leakage occurs after the tunnel is finished. Therefore, a new shield butt joint section secondary lining structure needs to be researched. Meanwhile, the shield shell is kept in the tunnel as a permanent structure, underground water has strong corrosivity to the shield shell, and waterproof measures of the upstream surface and the downstream surface of the shield shell need to be researched so as to ensure the durability of the shield shell.
Chinese patent with application number CN201210198886.6 discloses a lining structure of a butt-joint section in a shield tunnel, which realizes the connection between a cast-in-place secondary lining and a prefabricated segment by means of pre-buried steel plates and embedded bars, but cast-in-place reinforced concrete lining in a butt-joint tunnel, the top of the cast-in-place lining is easy to cause that concrete cannot be effectively tamped due to gravity effect, and the waterproof performance of the cast-in-place lining cannot be effectively guaranteed.
Disclosure of Invention
The invention aims to provide a secondary lining structure of a shield underground butt joint section, which solves the problems of segment looseness, tunnel water leakage, shield shell corrosion and the like after a jack of the butt joint section is unloaded.
In order to solve the technical problem, the invention provides a secondary lining structure of a shield underground butt joint section, which comprises an annular special reinforced concrete segment, wherein a plurality of embedded steel plates and embedded bolts are uniformly arranged on the end surface of the special reinforced concrete segment along the circumferential direction; a shield shell is arranged outside the special reinforced concrete segment; the shield shell and the special reinforced concrete segment are coaxially arranged; the steel plate is a triangular steel plate; the first right-angle surface of the triangular steel plate is welded with the embedded steel plate, and the second right-angle surface of the triangular steel plate is welded with the inner wall of the shield shell; the steel groove reinforcing piece is also included; the steel groove reinforcing member is anchored on the inner wall of the reinforced concrete segment through the assembling head; the special reinforced concrete segments are connected with each other pairwise through steel pipe segments.
In a preferred embodiment, a first gasket is further arranged between the splicing head and the steel groove reinforcing member.
In a preferred embodiment, the special reinforced concrete pipe piece is connected with the steel pipe piece through a triangular steel plate; a second gasket is arranged on one side of the steel pipe sheet; and the studs sequentially penetrate through the embedded steel plates and the second gaskets to realize the connection of the special reinforced concrete pipe piece and the steel pipe piece.
In a preferred embodiment, the shield comprises a first shield and a second shield; and a butt joint steel plate is connected between the first shield shell and the second shield shell.
In a preferred embodiment, the steel pipe sheet comprises an inner layer structure and an outer layer structure; the inner layer structure comprises a first end bearing plate, a first arc-shaped side plate, a first rib plate and a first bolt connecting hole; the outer layer structure comprises a second end bearing plate, a second arc-shaped side plate, a second rib plate and a second bolt connecting hole.
In a preferred embodiment, the first arc-shaped side plate and the first rib plate are respectively tightly attached to the second arc-shaped side plate and the second rib plate; the outer layer structure and the inner layer structure are coaxially arranged.
In a preferred embodiment, the first rib plate and the second rib plate are provided with bolt connecting holes, and the first rib plate and the second rib plate are connected through bolt connecting holes.
In a preferred embodiment, the inner wall and the outer shell of the shield are coated with a waterproof coating with a certain thickness to enhance the corrosion resistance of the shield and reduce the corrosive attack of groundwater on the shield.
In a preferred embodiment, the cavity at the position of the triangular steel plate block is subjected to cast-in-place concrete sealing treatment.
The invention also provides a construction method of the secondary lining structure of the shield underground butt joint section, which adopts the secondary lining structure of the shield underground butt joint section and comprises the following steps:
step one, the formed tunnel stabilizing treatment comprises the following steps:
before the jack of the shield tunneling machine is unloaded, one side surface of a steel plate anti-loosening piece is welded with a pre-embedded steel plate in a special reinforced concrete segment, and the other side surface of the steel plate anti-loosening piece is welded with a shield shell to prevent the stress of the segment from being relaxed; connecting 4 rings of specially-made reinforced concrete segments at the tail part of the shield tunneling machine into a whole through a steel groove reinforcing part; finally, a steel plate is welded between the first shield machine shell and the second shield machine shell so as to improve the overall rigidity and stability of the butt joint structure;
step two, corrosion resistance treatment comprises the following steps:
spraying modified epoxy anticorrosive waterproof paint on the inner wall and the outer shell of the shield shell to enhance the durability of the shield shell, and laying a polyethylene plate as a buffer layer on the outer side of the prefabricated pipe piece;
step three, splicing the prefabricated duct pieces, comprising:
the secondary lining structure of the shield underground butt joint section is assembled by prefabricated pipe pieces; the assembling sequence of the pipe pieces in the butt joint section is that a steel pipe piece, a special reinforced concrete pipe piece, a common reinforced concrete pipe piece, a special reinforced concrete pipe piece and a steel pipe piece are sequentially assembled from left to right; the steel pipe piece and the special reinforced concrete pipe piece are connected with a nut applied subsequently mainly through an embedded bolt; meanwhile, the cavity at the position of the triangular steel plate block is subjected to cast-in-place concrete sealing treatment.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. according to the secondary lining structure of the shield underground butt joint section, one side surface of the triangular steel plate block is welded with the embedded steel plate in the special concrete segment, and the other side surface of the triangular steel plate block is welded with the shield shell, so that the stress relaxation of the segment can be prevented.
2. The secondary lining structure of the shield underground butt joint section of the invention integrates the rear 4 ring canal pieces of the shield tail into a whole through channel steel, can effectively ensure the stress stability of the formed tunnel canal pieces, and further reduces the axial deformation of the canal pieces and the opening amount of the ring seams among the canal pieces after the jack of the shield machine is unloaded.
3. According to the secondary lining structure of the shield underground butt joint section, the prefabricated pipe pieces are assembled, so that the phenomenon that the quality of the secondary lining structure of the shield underground butt joint section is influenced by the quality of cast-in-place concrete can be effectively reduced, and water leakage of the tunnel butt joint section is avoided.
4. The secondary lining structure of the shield underground butt joint section can meet the splicing requirement of the lengths of the pipe pieces which are not enough for the conventional size under the condition of different butt joint middle distances through the steel pipe pieces which are arranged at the two ends of the butt joint section and can extend along the axis direction of the tunnel.
5. According to the secondary lining structure of the shield underground butt joint section, the waterproof coating with a certain thickness is sprayed on the inner wall and the outer shell of the shield shell to enhance the corrosion resistance of the shield shell and reduce the corrosion and erosion effects of underground water on the shield shell.
Drawings
FIG. 1 is a schematic view illustrating a stabilization process of a formed tunnel of a secondary lining structure of a shield underground docking section according to a preferred embodiment of the present invention;
FIG. 2 is a prefabricated segment assembly drawing of a secondary lining structure of a shield underground butt joint section in the preferred embodiment of the invention;
FIG. 3 is a detailed structural diagram of the connection between a special reinforced concrete segment and a steel pipe segment of the secondary lining structure of the shield underground docking section in the preferred embodiment of the invention;
FIG. 4 is a schematic diagram of a steel pipe sheet of a secondary lining structure of a shield underground butt joint section in the preferred embodiment of the invention;
FIG. 5 is a schematic view showing the connection between a steel pipe segment of a secondary lining structure of a shield underground docking section and a specially-made reinforced concrete pipe segment in the preferred embodiment of the present invention;
FIG. 6 is a schematic diagram of the inner layer structure of the secondary lining structure of the shield underground butt joint section in the preferred embodiment of the invention;
FIG. 7 is a schematic diagram of the outer layer structure of the secondary lining structure of the shield underground butt joint section in the preferred embodiment of the invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
A secondary lining structure of a shield underground butt joint section refers to figures 1 to 5, and comprises an annular special reinforced concrete segment 1, wherein a plurality of Q235 embedded steel plates 9 and embedded bolts 13 are uniformly arranged on the end face of the special reinforced concrete segment 1 along the circumferential direction; a shield shell is arranged outside the special reinforced concrete segment 1; the shield shell and the special reinforced concrete segment 1 are coaxially arranged; the steel plate is characterized by also comprising a triangular steel plate 2; welding a first right-angle surface of the triangular steel plate 2 with the embedded steel plate 9 before the jack is unloaded, and welding a second right-angle surface of the triangular steel plate 2 with the inner wall of the shield shell to prevent the stress relaxation of the special reinforced concrete segment 1; also comprises a steel groove reinforcing member 6; the steel groove reinforcing part 6 is anchored on the inner wall of the reinforced concrete segment through the splicing head 11, and the 4 rings of reinforced concrete segments behind the shield tail are connected with each other to prevent the axial deformation of the segments and the expansion of the annular gap among the segments; the special reinforced concrete segments 1 are connected with each other pairwise through the steel tube segments 7. In order to reduce the phenomenon that the quality of a secondary lining structure of a shield butt joint section is influenced by the quality of cast-in-place concrete, the secondary lining structure of the shield butt joint section is assembled by prefabricated pipe pieces. The inner wall and the shell of the shield shell are both sprayed with waterproof coating layers with certain thicknesses so as to enhance the corrosion resistance of the shield shell. And a first gasket 12 with the thickness of 3cm is arranged between the assembling head 11 and the steel groove reinforcing member 6. So as to increase the fastening performance of the channel steel and the assembling head 11. In this embodiment, the channel reinforcement is 20 gauge.
The special reinforced concrete segment 1 is connected with the steel pipe piece 7 through the triangular steel plate 2; a second gasket 15 is arranged on one side of the steel pipe sheet 7; and the studs sequentially penetrate through the embedded steel plates 9 and the second gaskets 15 to realize the connection of the special reinforced concrete segment 1 and the steel pipe piece 7.
The shield shell comprises a first shield shell 3 and a second shield shell 5; and a butt joint steel plate 4 is connected between the first shield shell 3 and the second shield shell 5. So as to improve the integral rigidity and stability of the butt joint structure.
The steel pipe sheet 7 comprises an inner layer structure 18 and an outer layer structure 16; the inner layer structure 18 comprises a first end bearing plate 20, a first arc-shaped side plate 17, a first rib plate 21 and a first bolt connecting hole 22; the outer skin structure 16 includes a second end carrier plate 24, a second arcuate side plate 23, a second rib plate 25, and a second bolt attachment hole 26. Under the condition of different butt joint middle separation distances, the steel pipe piece inner layer structure 18 can extend along the axial direction of the tunnel so as to meet the assembling requirement of the length of the pipe piece with the length less than the conventional size. The first arc-shaped side plate 17 and the first rib plate 21 are respectively tightly attached to the second arc-shaped side plate 23 and the second rib plate 25; the outer structure 16 is disposed coaxially with the inner structure 18. After the steel pipe piece 7 is positioned, the inner-layer structure 16 and the outer-layer structure 16 arc-shaped side plates are subjected to welding and plugging treatment, bolt connecting holes are formed in the first rib plates 21 and the second rib plates, and the first rib plates 21 and the second rib plates 25 are connected through the bolt connecting holes 19. Meanwhile, the cavity at the position of the triangular steel plate block is subjected to cast-in-place concrete sealing treatment. The steel pipe piece 7 and the special reinforced concrete pipe piece 1 are connected with a nut applied subsequently mainly through the embedded bolt 13. The assembling sequence of the prefabricated pipe pieces is as follows from left to right in sequence: the shield comprises a first shield shell 3, a steel pipe sheet 7 on the left side, a special reinforced concrete pipe sheet 1, a common reinforced concrete pipe sheet 8, a special reinforced concrete pipe sheet 1 and a second shield shell 5, and the steel pipe sheet 7 on the right side.
Now, the construction form of the secondary lining structure of the shield underground butt joint section is described in detail:
1. shaped tunnel stabilization comprising:
before the jack of the shield tunneling machine is unloaded, one side surface of the triangular steel plate anti-loosening piece is welded with the embedded steel plate 9 in the special reinforced concrete segment 1, and the other side surface of the triangular steel plate anti-loosening piece is welded with the shield shell to prevent the stress of the segment from being relaxed. In order to further reduce the axial deformation of the segments and the opening amount of the circumferential seams among the segments after the shield machine jack is unloaded, 4 circumferential pipe segments behind the shield tail are connected into a whole through a channel steel reinforcing piece. And finally, welding a butt joint steel plate 4 between the first shield shell 3 of the shield machine and the second shield shell 5 of the shield machine so as to improve the overall rigidity and stability of the butt joint structure.
2. An anti-corrosion treatment comprising:
the shield shell is kept in the tunnel as a permanent structure, and underground water has strong corrosion to the shield shell, so that the inner wall and the outer shell of the shield shell are both sprayed with waterproof paint with certain thickness to enhance the corrosion resistance of the shield shell.
3. Prefabricated section of jurisdiction of concatenation includes:
in order to reduce the phenomenon that the quality of a secondary lining structure of a shield butt joint section is influenced by the quality of cast-in-place concrete, the secondary lining structure of the shield butt joint section is assembled by prefabricated pipe pieces. The assembling sequence of the inner pipe pieces of the butt joint section is that a steel pipe piece 7, a special reinforced concrete pipe piece 1, a common reinforced concrete pipe piece 8, the special reinforced concrete pipe piece 1 and the steel pipe piece 7 are sequentially assembled from left to right. The steel pipe piece 7 and the special reinforced concrete pipe piece 1 are connected with a nut applied subsequently mainly through the embedded bolt 13. Meanwhile, the cavity at the position of the triangular steel plate block is subjected to cast-in-place concrete sealing treatment.
According to the secondary lining structure of the shield underground butt joint section, one side surface of 2 triangular steel plates is welded with the Q235 embedded steel plate 9 in the special concrete segment, and the other side surface of the triangular steel plate is welded with the shield shell, so that the stress relaxation of the segment can be prevented. The secondary lining structure of the shield underground butt joint section of the invention integrates the rear 4 ring pipe pieces of the shield tail into a whole through channel steel, can effectively ensure the stress stability of the formed tunnel pipe pieces, and further reduces the axial deformation and the ring seam opening amount of the pipe pieces after the jack of the shield machine is unloaded. According to the secondary lining structure of the shield underground butt joint section, the prefabricated pipe pieces are assembled, so that the phenomenon that the quality of the secondary lining structure of the shield underground butt joint section is influenced by the quality of cast-in-place concrete can be effectively reduced, and water leakage of the tunnel butt joint section is avoided. The secondary lining structure of the shield underground butt joint section can meet the splicing requirement of the lengths of the pipe pieces which are not enough for the conventional size under the condition of different butt joint middle distances through the steel pipe pieces 7 which are arranged at the two ends of the butt joint section and can extend along the axis direction of the tunnel. According to the secondary lining structure of the shield underground butt joint section, the waterproof coating with a certain thickness is sprayed on the inner wall and the outer shell of the shield shell to enhance the corrosion resistance of the shield shell and reduce the corrosion and erosion effects of underground water on the shield shell.
The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art can make insubstantial changes in the technical scope of the present invention within the technical scope of the present invention, and the actions infringe the protection scope of the present invention are included in the present invention.
Claims (10)
1. A secondary lining structure of a shield underground butt joint section is characterized by comprising an annular special reinforced concrete segment, wherein the end surface of the special reinforced concrete segment is uniformly provided with a plurality of embedded steel plates and embedded bolts along the circumferential direction; a shield shell is arranged outside the special reinforced concrete segment; the shield shell and the special reinforced concrete segment are coaxially arranged; the steel plate is a triangular steel plate; the first right-angle surface of the triangular steel plate is welded with the embedded steel plate, and the second right-angle surface of the triangular steel plate is welded with the inner wall of the shield shell; the steel groove reinforcing piece is also included; the steel groove reinforcing member is anchored on the inner wall of the reinforced concrete segment through the assembling head; the special reinforced concrete segments are connected with each other pairwise through steel pipe segments.
2. The secondary lining structure of the shield underground butt joint section according to claim 1, wherein a first gasket is further arranged between the assembling head and the steel groove reinforcing member.
3. The secondary lining structure of the shield underground butt joint section according to claim 2, wherein the specially-made reinforced concrete segment is connected with the steel pipe segment through a triangular steel plate; a second gasket is arranged on one side of the steel pipe sheet; and the studs sequentially penetrate through the embedded steel plates and the second gaskets to realize the connection of the special reinforced concrete pipe piece and the steel pipe piece.
4. The secondary lining structure of the shield underground docking section according to claim 3, wherein the shield shell comprises a first shield shell and a second shield shell; and a butt joint steel plate is connected between the first shield shell and the second shield shell.
5. The secondary lining structure of the shield underground butt joint section according to any one of claims 1 to 4, wherein the steel pipe sheet comprises an inner layer structure and an outer layer structure; the inner layer structure comprises a first end bearing plate, a first arc-shaped side plate, a first rib plate and a first bolt connecting hole; the outer layer structure comprises a second end bearing plate, a second arc-shaped side plate, a second rib plate and a second bolt connecting hole.
6. The secondary lining structure of the shield underground butt joint section according to claim 5, wherein the first arc-shaped side plate and the first rib plate are respectively tightly attached to the second arc-shaped side plate and the second rib plate; the outer layer structure and the inner layer structure are coaxially arranged.
7. The secondary lining structure of the shield underground butt joint section according to claim 6, wherein bolt connection holes are formed in the first rib plate and the second rib plate, and the first rib plate and the second rib plate are connected through bolts through the bolt connection holes.
8. The secondary lining structure of the shield underground butt joint section according to claim 5, wherein the inner wall and the outer shell of the shield are coated with a waterproof coating with a certain thickness to enhance the corrosion resistance of the shield and reduce the corrosive attack of underground water on the shield.
9. The secondary lining structure of the shield underground butt joint section according to claim 7, wherein the cavity at the position of the triangular steel plate block is subjected to cast-in-place concrete sealing treatment.
10. A construction method of a secondary lining structure of a shield underground butt joint section, which is characterized by adopting the secondary lining structure of the shield underground butt joint section of any one of claims 1 to 9, and comprises the following steps:
step one, the formed tunnel stabilizing treatment comprises the following steps:
before the jack of the shield tunneling machine is unloaded, one side surface of a steel plate anti-loosening piece is welded with a pre-embedded steel plate in a special reinforced concrete segment, and the other side surface of the steel plate anti-loosening piece is welded with a shield shell to prevent the stress of the segment from being relaxed; connecting 4 rings of specially-made reinforced concrete segments at the tail part of the shield tunneling machine into a whole through a steel groove reinforcing part; finally, a steel plate is welded between the first shield machine shell and the second shield machine shell so as to improve the overall rigidity and stability of the butt joint structure;
step two, corrosion resistance treatment comprises the following steps:
spraying modified epoxy anticorrosive waterproof paint on the inner wall and the outer shell of the shield shell to enhance the durability of the shield shell, and laying a polyethylene plate as a buffer layer on the outer side of the prefabricated pipe piece;
step three, splicing the prefabricated duct pieces, comprising:
the secondary lining structure of the shield underground butt joint section is assembled by prefabricated pipe pieces; the assembling sequence of the pipe pieces in the butt joint section is that a steel pipe piece, a special reinforced concrete pipe piece, a common reinforced concrete pipe piece, a special reinforced concrete pipe piece and a steel pipe piece are sequentially assembled from left to right; the steel pipe piece and the special reinforced concrete pipe piece are connected with a nut applied subsequently mainly through an embedded bolt; meanwhile, the cavity at the position of the triangular steel plate block is subjected to cast-in-place concrete sealing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111021952.8A CN113775356A (en) | 2021-09-01 | 2021-09-01 | Shield constructs underground butt joint section secondary lining structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111021952.8A CN113775356A (en) | 2021-09-01 | 2021-09-01 | Shield constructs underground butt joint section secondary lining structure |
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| CN113775356A true CN113775356A (en) | 2021-12-10 |
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| CN202111021952.8A Pending CN113775356A (en) | 2021-09-01 | 2021-09-01 | Shield constructs underground butt joint section secondary lining structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114737993A (en) * | 2022-04-21 | 2022-07-12 | 南宁中铁广发轨道装备有限公司 | Recyclable steel concrete combined duct piece for quickly drilling connection channel and assembling method |
| CN114872184A (en) * | 2022-05-06 | 2022-08-09 | 中煤科工集团北京华宇工程有限公司 | Method for manufacturing shield segment and method for manufacturing shield pipeline |
| CN115822661A (en) * | 2023-02-13 | 2023-03-21 | 中铁五局集团电务工程有限责任公司 | Construction equipment for joint part of subway shield tunnel section and mine tunnel section and construction method thereof |
| CN115929354A (en) * | 2023-03-09 | 2023-04-07 | 中交隧道工程局有限公司 | Lining structure connection form for shield underground butt joint and construction method |
| CN116044442A (en) * | 2023-03-31 | 2023-05-02 | 中建交通建设集团有限公司 | Butt joint section structure in shield ground and construction method thereof |
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| CN108119163A (en) * | 2018-01-31 | 2018-06-05 | 中交公路长大桥建设国家工程研究中心有限公司 | For the assembled secondary liner structure of drill+blast tunnel and composite lining structure |
| CN208594939U (en) * | 2018-07-06 | 2019-03-12 | 大连乾亿重工有限公司 | A kind of high intensity shield drive end unit balance mechanism |
| CN208594940U (en) * | 2018-07-06 | 2019-03-12 | 大连乾亿重工有限公司 | A kind of high intensity shield machine main body |
| CN110359934A (en) * | 2019-08-21 | 2019-10-22 | 中国铁建重工集团股份有限公司 | Hexagon section of jurisdiction, supporting construction and method for tunnel construction |
| KR20190139507A (en) * | 2018-06-08 | 2019-12-18 | 주식회사 하이제트이엔지 | Semi-Shield method propulsion pipe and its watertight structure |
| CN112523777A (en) * | 2020-11-19 | 2021-03-19 | 中国电建集团华东勘测设计研究院有限公司 | Shield tunnel reinforcing structure and construction method |
| CN212803267U (en) * | 2020-09-02 | 2021-03-26 | 中建交通建设集团有限公司 | Steel negative ring pipe structure for shield construction |
| CN213450412U (en) * | 2020-10-23 | 2021-06-15 | 中铁十四局集团有限公司 | Shield/TBM tunnel supporting structure with limiting device telescopic steel pipe sheet |
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| CN114737993A (en) * | 2022-04-21 | 2022-07-12 | 南宁中铁广发轨道装备有限公司 | Recyclable steel concrete combined duct piece for quickly drilling connection channel and assembling method |
| CN114872184A (en) * | 2022-05-06 | 2022-08-09 | 中煤科工集团北京华宇工程有限公司 | Method for manufacturing shield segment and method for manufacturing shield pipeline |
| CN114872184B (en) * | 2022-05-06 | 2023-12-22 | 中煤科工集团北京华宇工程有限公司 | Method for manufacturing shield segment and method for manufacturing shield pipeline |
| CN115822661A (en) * | 2023-02-13 | 2023-03-21 | 中铁五局集团电务工程有限责任公司 | Construction equipment for joint part of subway shield tunnel section and mine tunnel section and construction method thereof |
| CN115822661B (en) * | 2023-02-13 | 2023-06-02 | 中铁五局集团电务工程有限责任公司 | Construction equipment and construction method for joint part of subway shield tunnel section and mine tunnel section |
| CN115929354A (en) * | 2023-03-09 | 2023-04-07 | 中交隧道工程局有限公司 | Lining structure connection form for shield underground butt joint and construction method |
| CN115929354B (en) * | 2023-03-09 | 2023-06-06 | 中交隧道工程局有限公司 | Lining structure connection form for shield in-ground butt joint and construction method |
| CN116044442A (en) * | 2023-03-31 | 2023-05-02 | 中建交通建设集团有限公司 | Butt joint section structure in shield ground and construction method thereof |
| CN116044442B (en) * | 2023-03-31 | 2023-06-02 | 中建交通建设集团有限公司 | Butt joint section structure in shield ground and construction method thereof |
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