CN216691084U - Steel sleeve for shield tunneling machine - Google Patents
Steel sleeve for shield tunneling machine Download PDFInfo
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- CN216691084U CN216691084U CN202122983665.7U CN202122983665U CN216691084U CN 216691084 U CN216691084 U CN 216691084U CN 202122983665 U CN202122983665 U CN 202122983665U CN 216691084 U CN216691084 U CN 216691084U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model provides a steel sleeve for a shield tunneling machine, and relates to the technical field of tunnel engineering. The steel sleeve includes: the cylinder is provided with a plurality of first arc-shaped plates and a plurality of second arc-shaped plates; the steel sleeve comprises a plurality of bases, a first arc-shaped plate and a second arc-shaped plate, wherein the bases are arranged along the axis direction of the steel sleeve; the transition ring is fixedly connected to one end of the cylinder body. The cylinder body comprises a plurality of first arc-shaped plates and a plurality of second arc-shaped plates, so that the cylinder body can be conveniently transported, disassembled and assembled; the number of the bases is multiple, so that the supporting pressure on the cylinder can be effectively shared; the base comprises a plurality of substrates, so that the weight of the base can be reduced, but the bearing capacity of the base is not greatly influenced; the multiple bases are connected through the fixing pipes, so that the stress of the bases is more stable, and the deformation of the bases is reduced; the transition ring can stably connect the cylinder body to the tunnel portal, and safety guarantee is provided for launching or receiving of the shield tunneling machine.
Description
Technical Field
The utility model relates to the technical field of tunnel engineering, in particular to a steel sleeve for a shield tunneling machine.
Background
A shield machine is a tunnel boring machine using a shield method. The shield method is a mechanical construction method for preventing tunnel collapse by propelling a shield machine in the ground and supporting surrounding rocks around through a shield shell and duct pieces.
In the construction of the shield interval tunnel, shield starting and receiving are key processes in the whole project, and a steel sleeve method can be adopted in order to balance the earth pressure and the water pressure of the shield machine entering or reaching the excavation surface of the receiving tunnel opening. However, there are not many cases for the steel sleeve for launching or receiving the large shield machine, and if the existing steel sleeve is simply enlarged and used on the large shield machine, the strength of the steel sleeve is insufficient, and the pedestal is easy to deform.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a steel sleeve for a shield machine, which can be used for a large shield machine and can reduce the deformation of a base of the steel sleeve.
According to an embodiment of the utility model, the steel sleeve for the shield tunneling machine comprises:
the shield machine comprises a cylinder body and a shield machine body, wherein the cylinder body comprises a plurality of first arc-shaped plates extending along the circumferential direction of the cylinder body and a plurality of second arc-shaped plates extending along the axial direction of the cylinder body, the plurality of first arc-shaped plates are sequentially connected along the axial direction of the cylinder body, and the plurality of second arc-shaped plates are sequentially connected along the circumferential direction of the cylinder body and are respectively connected to two ends of the plurality of first arc-shaped plates along the circumferential direction of the cylinder body so as to form a containing cavity for containing the shield machine;
the bases are arranged in one-to-one correspondence with the first arc-shaped plates and connected to the lower ends of the first arc-shaped plates, each base comprises a fixed pipe and a plurality of base plates, the base plates are arranged at intervals along the axis direction of the barrel body, the fixed pipes penetrate through the base plates, an operation channel is formed inside each fixed pipe, and the fixed pipes are communicated;
and the transition ring is fixedly connected to one end of the cylinder body.
The steel sleeve for the shield tunneling machine according to the embodiment of the utility model at least has the following beneficial effects:
the cylinder body comprises a plurality of first arc-shaped plates and a plurality of second arc-shaped plates, so that the cylinder body can be conveniently transported, disassembled and assembled; the number of the bases is multiple, so that the supporting pressure on the cylinder can be effectively shared; the base comprises a plurality of substrates, so that the weight of the base can be reduced, but the bearing capacity of the base is not greatly influenced; the multiple bases are connected through the fixing pipes, so that the stress of the bases is more stable, and the deformation of the bases is reduced; the transition ring can stably connect the cylinder body to the tunnel portal, and safety guarantee is provided for launching or receiving of the shield tunneling machine.
According to some embodiments of the present invention, the first arc-shaped plate is provided with a plurality of mounting grooves arranged along a circumferential direction of the cylinder, the mounting grooves for facilitating connection of adjacent first arc-shaped plates.
According to some embodiments of the utility model, the base comprises a connecting assembly, the connecting assembly comprises a first flange and a connecting pipe, the first flange is arranged at each of two ends of the connecting pipe, reinforcing ribs are arranged on the connecting pipe and the first flange, the base is provided with a second flange, the first flange is connected with the second flange, and adjacent bases are connected through the connecting assembly.
According to some embodiments of the present invention, a first connecting plate is fixedly connected to edges of the first arc-shaped plate and the second arc-shaped plate, the first connecting plate is provided with a plurality of through holes at intervals, and the first arc-shaped plate and the second arc-shaped plate are connected through the through holes.
According to some embodiments of the utility model, the first connecting plate is provided with a plurality of second connecting plates at intervals along the axial direction of the cylinder, and the adjacent first arc-shaped plates and the second arc-shaped plates are connected through the second connecting plates.
According to some embodiments of the utility model, each of the plurality of substrates is provided with a positioning step, and the positioning steps are matched with the first connecting plate for positioning.
According to some embodiments of the utility model, an end face of one end of the transition ring, which is far away from the cylinder, is obliquely arranged from top to bottom, and the width of the transition ring along the axial direction is gradually increased from top to bottom.
According to some embodiments of the utility model, the transition ring comprises a plurality of ring pieces and a plurality of rib plates, the plurality of rib plates are arranged at intervals along the circumferential direction of the ring pieces, the rib plates at two ends of the ring pieces are both provided with connecting holes, and adjacent ring pieces are connected through the connecting holes.
According to some embodiments of the utility model, a rear end cover is arranged at one end of the cylinder body far away from the transition ring, and the rear end cover comprises a plurality of end cover plates which are connected with the cylinder body.
According to some embodiments of the utility model, the rear end cap is provided with a grout tube.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the example serve to explain the principles of the utility model and not to limit the utility model. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a steel sleeve provided by an embodiment of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is another schematic view of a steel sleeve provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of a base provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a second curved plate structure according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a substrate structure according to an embodiment of the present invention;
FIG. 7 is another schematic view of a steel sleeve provided in accordance with an embodiment of the present invention;
FIG. 8 is a schematic view of the orientation of a rear end cap provided by an embodiment of the present invention;
FIG. 9 is an enlarged view of the structure at B in FIG. 8;
fig. 10 is a schematic view of the inner direction of the cylinder according to the embodiment of the present invention.
Reference numerals:
a steel sleeve 1000;
the device comprises a cylinder body 100, a first arc-shaped plate 110, a mounting groove 111, a second arc-shaped plate 120, a first connecting plate 121, a second connecting plate 122 and a filling opening 130;
the transition ring 200, the ring piece 210, the rib plate 220, the connecting hole 221, the manhole cover plate 230 and the first manhole 240;
the structure comprises a base 300, a base plate 310, a mounting hole 311, a positioning step 312, a connecting assembly 320, a connecting pipe 321, a first flange 322, a second flange 330, a supporting plate 340 and a fixing pipe 350;
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
A shield machine is a tunnel boring machine using a shield method. The shield method is a mechanical construction method for preventing tunnel collapse by propelling a shield machine in the ground and supporting surrounding rocks around through a shield shell and duct pieces. The shield launching and arrival are generally operated in a vertical shaft, are key procedures in the whole project and are the links with the greatest difficulty and the highest risk. As the shield machine is difficult to build soil pressure before entering or reaching the receiving tunnel door so as to balance the soil pressure and the water pressure of the excavation face, particularly the soil with poor stability. If the construction is reinforced by the mixing pile and the jet grouting pile from the ground, the construction quality is difficult to ensure, and the risk of water leakage and sand gushing is also caused. Therefore, in order to ensure construction quality, a steel sleeve 1000 construction method may be adopted for originating or receiving the shield machine.
Referring to fig. 1, 3 and 4, a steel sleeve 1000 according to an embodiment of the present invention can be used for originating or receiving a shield machine, particularly a large shield machine. Steel sleeve 1000 includes barrel 100, transition ring 200, packing ports 130, and base 300.
The cylinder 100 comprises a plurality of first arc-shaped plates 110 extending along the circumferential direction of the cylinder 100 and a plurality of second arc-shaped plates 120 extending along the axial direction of the cylinder 100, and the cylinder 100 can be conveniently transported, disassembled and assembled by adopting the plurality of plates; the first arc-shaped plates 110 are sequentially connected along the axial direction of the cylinder 100, the second arc-shaped plates 120 are sequentially connected along the circumferential direction of the cylinder 100, and are respectively connected to the two circumferential ends of the first arc-shaped plates 110 along the cylinder 100, so that a cavity is formed, and the shield tunneling machine can be accommodated.
The plurality of bases 300 are disposed corresponding to the first arc-shaped plates 110, and the bases 300 are connected to the lower ends of the first arc-shaped plates 110 to support the drum 100 and fix the drum 100. The base 300 includes a fixing tube 350 and a plurality of substrates 310, the substrates 310 are spaced along the axial direction of the cylinder 100, the fixing tube 350 is inserted into the mounting hole 311 of the substrates 310, and the fixing tubes 350 are communicated with the inside to form an operation channel. The plurality of bases 300 can effectively share the pressure of the cylinder 100, so that the overall stress of the bases 300 is more stable, and the deformation of the bases 300 is reduced; the worker fixedly connects or disconnects the adjacent fixed pipes 350 through the working passage, which also facilitates the passage of the worker in a narrow shaft.
The transition ring 200 is fixedly connected to one end of the barrel 100, the axis of the transition ring 200 coincides with the axis of the barrel 100, and one end of the transition ring 200, which is far away from the barrel 100, can stably connect the barrel 100 to a tunnel door on the side wall of a vertical shaft, so that safety guarantee is provided for launching or receiving of the shield tunneling machine. A filler opening 130 is provided above the cartridge body 100 for filling the inside of the cartridge body 100 with a filler such as silt, slurry or water.
Referring to fig. 3 and 4, it can be appreciated that since the first arc plates 110 are disposed above the base 300, the adjacent first arc plates 110 are not conveniently connected outside the drum 100. Therefore, a plurality of mounting grooves 111 are formed on the first arc plate 110, the plurality of mounting grooves 111 are arranged along the circumference of the cylinder 100, and the mounting grooves 111 are used for conveniently connecting the adjacent first arc plates 110 and also used for connecting the transition ring 200 and the rear cover 400.
Referring to fig. 2 and 4, the base 300 is further coupled by a coupling assembly 320, the coupling assembly 320 including a coupling pipe 321 and a first flange 322. Both ends of the connecting pipe 321 are provided with first flanges 322, and a reinforcing rib is further arranged between the connecting pipe 321 and the first flanges 322 to improve the strength of the connecting component 320. The base 300 is provided with a second flange 330, the first flange 322 at one end of the connecting pipe 321 is connected with the second flange 330 of the base 300, and the first flange 322 at the other end of the connecting pipe 321 is connected with the second flanges 330 of other adjacent bases 300.
Referring to fig. 4, the susceptor 300 is provided at a lower end thereof with a support plate 340, and the support plate 340 serves to connect the plurality of substrates 310 in addition to increasing a force-receiving area of the susceptor 300.
It can be understood that the adjacent susceptors 300 are connected to each other through the fixing tube 350, the connecting member 320 and the support plate 340, so that the connection strength of the base plate 310 can be effectively improved, and the deformation of the susceptors 300 can be reduced.
Referring to fig. 5, a first connection plate 121 is fixedly connected to an edge of the second arc-shaped plate 120, and connection holes 221 are formed at intervals in the first connection plate 121. Bolts are provided through the coupling holes 221 on the first coupling plate 121 to couple the adjacent second arc-shaped plates 120. It should be noted that the first connecting plate 121 is also fixedly connected to the edge of the first arc-shaped plate 110, so that the second arc-shaped plate 120 is connected to the first arc-shaped plate 110.
The steel sleeve 1000 provided by the embodiment can be used for a large shield machine, so that the requirement on the connection strength between the components forming the steel sleeve 1000 is high. The steel sleeve 1000 is a split mounting structure, and in some embodiments, the joint positions are bolted, and when the shield tunneling machine completely enters the steel sleeve 1000, the joint positions belong to the weakest stressed parts. Therefore, referring to fig. 5, the first connecting plates 121 arranged along the axial direction of the sleeve are further provided with the second connecting plates 122 at intervals, and the adjacent first arc-shaped plates 110 or second arc-shaped plates 120 can be connected through the second connecting plates 122 in addition to the first connecting plates 121, so that the connecting strength between the first arc-shaped plates 110 and the second connecting plates 122 can be further improved.
Referring to fig. 6, a schematic structural diagram of a substrate 310 according to an embodiment of the utility model is shown. The upper left side and the upper right side of the base plate 310 are provided with positioning steps 312, and the positioning steps 312 are matched with the first connecting plate 121 of the arc-shaped plate, so that the positioning of the cylinder body 100 can be realized.
In the related art, the track of some stations is set to be a downhill when the stations leave the stations, and is set to be an uphill when the stations arrive, so that the design can save power. Thus, during the launch or arrival of the shield machine, its axis is not level with the horizontal plane. The steel sleeve 1000 requires that the axis of the steel sleeve 1000 is flush with the axis of the shield tunneling machine when the shield tunneling machine is started or received, and therefore, the technical scheme provided by the embodiment of the utility model is as follows:
referring to fig. 7, an end surface of the transition ring 200 far from one end of the barrel 100 is inclined from top to bottom, and a width of the transition ring 200 along an axial direction of the barrel 100 is gradually increased from top to bottom. Therefore, the transition ring 200 has an inclination angle with the shaft side wall, and the inclined end face of the transition ring 200 is attached to the shaft side wall by raising the rear end of the steel sleeve 1000. According to the actual tunneling condition of the shield tunneling machine, the size of the inclination angle is reasonably selected, so that the axis of the shield tunneling machine is basically flush with the axis of the barrel 100, and the condition that a cutter head of the shield tunneling machine touches the steel sleeve 1000 can be reduced.
It should be noted that, the rear end of the steel sleeve 1000 may be raised by providing a jacking mechanism and a jacking cylinder on the base 300 of the steel sleeve 1000, so that the tilt angle of the steel sleeve 1000 can be conveniently adjusted.
It should be noted that the axis of the steel sleeve 1000 is substantially flush with the axis of the shield tunneling machine, which means that the axis may be completely flush or may be not completely flush, because the shield tunneling machine cannot be kept completely smooth in operation, and there may be a case that the axis is not flush due to vibration.
Referring to fig. 1 and 2, it can be understood that the transition ring 200 is composed of a plurality of ring segments 210, and the use of a plurality of ring segments 210 can also facilitate the disassembly and assembly of the transition ring 200. Ring piece 210 fixedly connected with polylith gusset 220, polylith gusset 220 sets up along ring piece 210's circumference interval, and gusset 220 can improve transition ring 200's bulk strength, reduces the deformation. The rib plates 220 at the two ends of the ring piece 210 are provided with the connecting holes 221, and the adjacent ring pieces 210 can be connected through the connecting holes 221, so that the rib plates 220 can be reasonably utilized to connect the ring pieces 210, and the effect of increasing strength and the effect of connection can be achieved. Transition ring 200 is further connected to a first connection plate 121, and transition ring 200 is connected to barrel 100 through first connection plate 121.
Referring to fig. 1 and 2, it can be understood that a first manhole 240 is disposed below the transition ring 200, the first manhole 240 is covered with a manhole cover plate 230, and the manhole cover plate 230 is detachably coupled to the transition ring 200. The first manhole is used for personnel to access the inside of the steel casing 1000 for inspection or observation.
Referring to fig. 8 and 10, the steel sleeve 1000 further includes an arc flange 440 and a rear end cap 400, the arc flange 440 is disposed at an end far from the transition ring 200 and connected to the first connection plate 121 of the cylinder 100; the rear end cap 400 is coupled to the curved flange 440. The rear end cap 400 is used at the time of reception of the shield tunneling machine so that the steel sleeve 1000 forms a closed space after being connected with the tunnel portal. The rear cover 400 includes a plurality of end cover plates 430, for example, four end cover plates 430 are used in this embodiment, which are an upper cover plate, an upper middle cover plate, a middle lower cover plate and a lower cover plate. The use of multiple end cover plates 430 may facilitate disassembly and assembly and transportation of the rear end cap 400.
Referring to fig. 9, a grouting pipe 420 is provided in the rear end cap 400, and the cylinder 100 is reinforced by grouting through the grouting pipe 420. The grouting pipe 420 is provided with a screw thread, and a ball valve (not shown) is connected to the screw thread to make and break the grouting pipe 420.
Referring to fig. 8 and 10, a second manhole 450 is provided at the rear end cap 400, and the first manhole 240 is covered with a flange cover 410, and the flange cover 410 is detachably coupled to the rear end cap 400. In some embodiments, two second manhole 450 may be provided, each being provided to the lower cover plate. Second manhole 450 is also used for personnel to enter and exit drum 100, and also for drainage and pressure relief.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A steel sleeve for a shield tunneling machine, comprising:
the shield machine comprises a cylinder body and a shield machine body, wherein the cylinder body comprises a plurality of first arc-shaped plates extending along the circumferential direction of the cylinder body and a plurality of second arc-shaped plates extending along the axial direction of the cylinder body, the plurality of first arc-shaped plates are sequentially connected along the axial direction of the cylinder body, and the plurality of second arc-shaped plates are sequentially connected along the circumferential direction of the cylinder body and are respectively connected to two ends of the plurality of first arc-shaped plates along the circumferential direction of the cylinder body so as to form a containing cavity for containing the shield machine;
the bases are arranged in one-to-one correspondence with the first arc-shaped plates and connected to the lower ends of the first arc-shaped plates, each base comprises a fixed pipe and a plurality of base plates, the base plates are arranged at intervals along the axis direction of the barrel body, the fixed pipes penetrate through the base plates, an operation channel is formed inside each fixed pipe, and the fixed pipes are communicated;
and the transition ring is fixedly connected to one end of the cylinder body.
2. The steel sleeve for a shield tunneling machine according to claim 1, wherein the first arc-shaped plate is provided with a plurality of mounting grooves arranged along the circumference of the cylinder body, the mounting grooves being used to facilitate connection of adjacent first arc-shaped plates.
3. The steel sleeve for the shield tunneling machine according to claim 1, wherein the base comprises a connecting assembly, the connecting assembly comprises a first flange and a connecting pipe, the first flange is arranged at each of two ends of the connecting pipe, the connecting pipe and the first flange are provided with reinforcing ribs, the base is provided with a second flange, the first flange is connected with the second flange, and the adjacent bases are connected through the connecting assembly.
4. The steel sleeve for the shield tunneling machine according to claim 1, wherein a first connecting plate is fixedly connected to the edges of the first arc-shaped plate and the second arc-shaped plate, a plurality of through holes are formed in the first connecting plate at intervals, and the first arc-shaped plate and the second arc-shaped plate are connected through the through holes.
5. The steel sleeve for the shield tunneling machine according to claim 4, wherein the first connecting plate is provided with a plurality of second connecting plates at intervals along the axial direction of the cylinder, and the adjacent first arc-shaped plate and the second arc-shaped plate are connected by the second connecting plates.
6. The steel sleeve for the shield tunneling machine as claimed in claim 4, wherein a plurality of the base plates are provided with positioning steps, and the positioning steps are matched with the first connecting plate for positioning.
7. The steel sleeve for the shield tunneling machine according to claim 1, wherein an end face of the end of the transition ring away from the cylinder body is inclined from top to bottom, and the width of the transition ring in the axial direction gradually increases from top to bottom.
8. The steel sleeve for the shield tunneling machine according to claim 1, wherein the transition ring comprises a plurality of ring pieces and a plurality of rib plates, the plurality of rib plates are arranged at intervals along the circumferential direction of the ring pieces, the rib plates at two ends of the ring pieces are provided with connecting holes, and adjacent ring pieces are connected through the connecting holes.
9. The steel sleeve for the shield tunneling machine according to claim 1, wherein a rear end cover is arranged at one end of the sleeve body away from the transition ring, and the rear end cover comprises a plurality of end cover plates which are connected with the sleeve body.
10. The steel sleeve for a shield tunneling machine according to claim 9, wherein the rear end cap is provided with a grout tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122983665.7U CN216691084U (en) | 2021-11-30 | 2021-11-30 | Steel sleeve for shield tunneling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122983665.7U CN216691084U (en) | 2021-11-30 | 2021-11-30 | Steel sleeve for shield tunneling machine |
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| Publication Number | Publication Date |
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| CN216691084U true CN216691084U (en) | 2022-06-07 |
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| CN202122983665.7U Active CN216691084U (en) | 2021-11-30 | 2021-11-30 | Steel sleeve for shield tunneling machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115977693A (en) * | 2022-12-31 | 2023-04-18 | 淮安市中球盾构技术服务有限公司 | Ultra-large segmented steel sleeve and using method thereof |
-
2021
- 2021-11-30 CN CN202122983665.7U patent/CN216691084U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115977693A (en) * | 2022-12-31 | 2023-04-18 | 淮安市中球盾构技术服务有限公司 | Ultra-large segmented steel sleeve and using method thereof |
| CN115977693B (en) * | 2022-12-31 | 2024-02-06 | 淮安市中球盾构技术服务有限公司 | Ultra-large block type steel sleeve and use method thereof |
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