CN114872184A - Method for manufacturing shield segment and method for manufacturing shield pipeline - Google Patents
Method for manufacturing shield segment and method for manufacturing shield pipeline Download PDFInfo
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- CN114872184A CN114872184A CN202210488289.0A CN202210488289A CN114872184A CN 114872184 A CN114872184 A CN 114872184A CN 202210488289 A CN202210488289 A CN 202210488289A CN 114872184 A CN114872184 A CN 114872184A
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- 239000011229 interlayer Substances 0.000 claims description 12
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- 238000009417 prefabrication Methods 0.000 claims description 5
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0023—Lining the inner wall of hollow objects, e.g. pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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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Abstract
The application discloses a method for manufacturing a shield segment and a method for manufacturing a shield pipeline, wherein the method for manufacturing the shield segment at least comprises the following steps: prefabricating an arc-shaped duct piece outer shell; placing spiral ribs inside the segment shell, the spiral ribs extending in a circumferential direction of the segment shell; pouring concrete into the segment outer shell to at least partially coat the spiral ribs. The manufacturing method of the shield pipeline comprises the following steps: the segment prefabricating assembly is transported to a construction site, and assembled by a shield machine, and the segment prefabricating assembly is a shield segment manufactured by the shield segment manufacturing method provided by the application. By adopting the manufacturing method of the shield segment, the bearing capacity of the shield segment is improved, and meanwhile, the thickness of the shield segment is reduced, so that the material utilization rate is improved, the production cost is reduced, and the tunnel excavation amount in the construction process is reduced.
Description
Technical Field
The application relates to the field of tunnel engineering, in particular to a method for manufacturing a shield segment and a method for manufacturing a shield pipeline.
Background
The shield segment is a main assembly component for shield construction, is the innermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. The shield segment is a permanent lining structure of a shield tunnel, and the quality of the shield segment is directly related to the overall quality and safety of the tunnel, so that the waterproof performance and the durability of the tunnel are influenced.
With the large-scale application of the shield method, the shield tunnel is developed from a shallow-buried working condition to a deep-buried working condition, the traditional shield segment has large volume, low bearing capacity and high material consumption, is easy to damage in the installation and transportation process, cannot well adapt to the trend of rapid tunnel growth and buried depth increase, and is not in accordance with the currently implemented green construction concept. A new duct piece structure with high material utilization rate and good bearing capacity performance is needed to replace the traditional duct piece structure.
Content of application
The present application is directed to solving at least one of the problems in the prior art. Therefore, an object of the application is to provide a method for manufacturing a shield segment, by adopting the method for manufacturing the shield segment, the bearing capacity of the shield segment is improved, and meanwhile, the thickness of the shield segment is reduced, so that the material utilization rate is improved, the production cost is reduced, and the excavation amount of a tunnel in the construction process is reduced.
Another object of the present application is to provide a method of manufacturing a shield tunnel.
The method for manufacturing the shield segment according to the embodiment of the application at least comprises the following steps:
s1: prefabricating an arc-shaped duct piece outer shell, spiral ribs and annular ribs;
s2: placing spiral ribs and annular ribs inside the segment outer shell, wherein the spiral ribs and the annular ribs extend along the circumferential direction of the segment outer shell;
s3: pouring concrete into the segment outer shell to coat at least portions of the spiral ribs and the annular ribs.
According to the manufacturing method of the shield segment, the spiral ribs are buried in the concrete in the segment outer shell, and the spiral ribs restrain the concrete in the segment outer shell, so that the internal strength of the shield segment is improved in multiple directions, and the bearing capacity of the shield segment is improved; in addition, the thickness of the shield segment is reduced, the excavation amount of the tunnel in the construction process can be reduced, and the construction efficiency is improved.
According to the shield segment manufacturing method, the segment outer shell comprises the following steps: the outer shell body and the baffle that sets up this internal of outer shell body, the baffle is suitable for with this internal space separation of outer shell body is a plurality of subchambers.
Set up the baffle in the section of jurisdiction shell body, the baffle plays the supporting role to whole section of jurisdiction shell body, strengthens the rigidity of section of jurisdiction shell body, reduces the section of jurisdiction shell body and takes place the possibility of bucking before the concrete is smashed.
Further, according to a further example of the present application, the step S2 includes: placing the helical ribs within at least a portion of the plurality of sub-chambers.
Through above-mentioned technical scheme, section of jurisdiction shell body and spiral rib provide compound restraint for core concrete, improve the bearing capacity of shield structure section of jurisdiction, according to the demand of design bearing capacity when designing the shield structure section of jurisdiction, there is the spiral rib inside at least partial sub-cavity, have reduced the manufacturing cost of shield structure section of jurisdiction.
Further, according to a further example of the present application, the cross-section of the sub-chamber is configured as a rectangle.
Through above-mentioned technical scheme, the restraint effect of section of jurisdiction shell body to intermediate layer concrete has further been improved.
Further, according to a further example of the present application, the concrete flowing into the inside of the spiral rib is configured as core concrete, and the concrete flowing between the spiral rib and the segment shell is configured as sandwich concrete.
The spiral ribs provide a stronger constraint effect for the core concrete; the segment shell body and the spiral ribs provide composite restraint for the inner core concrete, and meanwhile, the segment shell body also provides restraint for the interlayer concrete, so that the bearing capacity of the shield segment is improved.
Further, according to a further example of the present application, a method for manufacturing a shield segment, further includes: step S4: and maintaining the core concrete and the interlayer concrete, and after the core concrete and the interlayer concrete reach the required strength, prefabricating the assembly for the duct piece.
Further, according to a further example of the present application, both ends of the core concrete and the interlayer concrete in the circumferential direction of the segment shell are gouged.
The two ends of the core concrete and the interlayer concrete in the circumferential direction of the segment shell are chiseled, so that when the segment is assembled subsequently, the concrete of the adjacent shield segments in the circumferential direction is connected through a concrete post-pouring zone.
The shield segment manufacturing method according to one embodiment of the present application is characterized in that annular ribs are placed inside the segment outer shell, the annular ribs extending in the circumferential direction of the segment outer shell and being adjacent to the spiral ribs.
Through above-mentioned technical scheme, the annular rib buries underground in the concrete and provides the hoop bearing capacity for the shield structure section of jurisdiction, has improved the bearing capacity of shield structure section of jurisdiction.
Further, the annular rib is a plurality of and a plurality of the annular rib sets up at the inboard or the outside of spiral rib.
Further, the spiral rib includes: a plurality of sequentially adjacent helical portions; before the spiral ribs are placed inside the segment outer shell, annular ribs are fixedly connected with the spiral ribs to adjust the lengths of the spiral parts in the extending direction of the spiral ribs.
Through above-mentioned technical scheme, can control the extension length of each helical portion on the one hand with annular rib and spiral rib fixed connection, on the other hand be convenient for the staff through annular rib before concreting location spiral rib.
Further, the lengths of the plurality of spiral portions in the extending direction of the spiral rib are the same.
Through the technical scheme, the spiral parts are the same in length in the extending direction of the spiral ribs, so that the spiral ribs can uniformly restrain core concrete, and the bearing capacity of the shield segment is improved.
The embodiment of the application also provides a manufacturing method of the shield pipeline, which comprises the following steps: the segment prefabricating assembly is transported to a construction site, and assembled by a shield machine, and the segment prefabricating assembly is a shield segment manufactured by the shield segment manufacturing method provided by the application.
According to the manufacturing method of the shield pipeline of an embodiment of the application, the segment shell body comprises: the device comprises an outer shell body and partition plates arranged in the outer shell body, wherein the partition plates are suitable for dividing the space in the outer shell body into a plurality of sub-chambers;
will the sub-chamber is in the vacancy portion of not pouring the concrete is reserved to the ascending both ends in circumference of section of jurisdiction shell body, with circumferentially adjacent two the section of jurisdiction shell body passes through the fastener fixed to adjacent two pour the concrete once more in the vacancy portion.
Through the technical scheme, the concrete of the shield segments adjacent to each other in the circumferential direction is connected through the concrete poured after the concrete is poured, so that the connection strength of the shield segments adjacent to each other in the circumferential direction is improved, and the bearing capacity of the shield pipeline is improved.
Further, two axially adjacent segment outer shells are fixed by fasteners.
Additional aspects and advantages of the present application 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 present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a shield segment provided in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a tube sheet outer shell provided in an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a spiral rib and a circular rib provided in an embodiment of the present application.
Fig. 4 is a cross-sectional view of a shield segment according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a shield tunnel according to an embodiment of the present application.
Fig. 6 is a schematic flow chart of a shield segment manufacturing method according to an embodiment of the present application.
Fig. 7 is a schematic flow chart of a shield pipe manufacturing method according to an embodiment of the present application.
Description of reference numerals: 1. a segment shell; 11. a housing body; 111. an empty part; 12. a partition plate; 13. a first end piece; 131. a first through hole; 14. a second end piece; 141. a second through hole; 2. a spiral rib; 21. a spiral portion; 3. concrete; 31. core concrete; 32. interlayer concrete; 4. annular ribs.
Detailed Description
Reference will now be made in detail to embodiments of the present application, 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 drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The embodiment of the application provides a shield segment, and the shield segment is used for assembling a shield pipeline in a tunnel to form the innermost barrier of the tunnel, and plays a role in resisting soil layer pressure, underground water pressure and some special loads.
Referring to fig. 1, 2 and 3, the shield segment of the present application comprises a segment shell 1, spiral ribs 2 and concrete 3. The segment outer shell 1 is used as a protective layer on the outermost side of the shield segment and also used as a container for accommodating the spiral ribs 2 and the concrete 3; concrete 3 is poured inside the segment shell body 1 to serve as a main body structure of the shield segment, and the concrete 3 is poured after the spiral ribs 2 are arranged inside the segment shell body 1, so that the concrete 3 and the spiral ribs 2 are fixedly connected together after pouring is finished; the segment shell body 1 is constructed into an arc shape, and the spiral ribs 2 are spiral structures which are arranged in the segment shell body 1 and extend along the circumferential direction of the segment shell body 1.
The spiral ribs 2 are at least partially embedded in the concrete 3, and for example, both ends of the spiral ribs 2 in the circumferential direction of the segment outer shell 1 may protrude out of the concrete 3. Spiral rib 2 provides the restraint for concrete 3 as the strengthening rib of shield structure section of jurisdiction for the inside strength of shield structure section of jurisdiction has all obtained the promotion on a plurality of directions, and then has improved the bearing capacity of shield structure section of jurisdiction.
According to the shield segment of the embodiment of the application, the spiral ribs 2 are arranged in the segment outer shell 1, so that the reinforcing ribs in the segment outer shell 1 are different from the existing reinforcing ribs (such as linear type or transverse and longitudinal staggered type), and the bearing capacity is higher, therefore, the equivalent bearing capacity can be achieved by using fewer spiral ribs 2, the material utilization rate is improved, and the use cost of the reinforcing ribs is greatly reduced; in addition, as the spiral ribs 2 are adopted, the bearing performance of the shield segment is better, the thickness of the shield segment is reduced, the tunnel excavation amount is reduced, and the production cost is reduced.
It should be noted that the circumferential direction and the axial direction of the segment shell body 1 in the embodiment of the present application are referred to as "the circumferential direction and the axial direction of the cylindrical shape in which the segment shell body 1 is curved".
Referring to fig. 2, according to section of jurisdiction shell body 1 of this application embodiment, including shell body 11, shell body 11 can be constructed as steelwork, and shell body 11 is the arc plate structure that the mouth of pipe is the rectangle, the shaft of pipe is circular-arc, has certain thickness. The plurality of outer shell bodies 11 can be spliced end to end in the circumferential direction of the segment outer shell 1 to form a circular ring, and it should be noted that the number of the plurality of outer shell bodies can be five, six, seven and the like, and the design is performed according to actual working conditions.
That is to say, outer casing body 11 is the outer profile spare of section of jurisdiction shell body 1, and the circumference of outer casing body 11 is the same with the circumference of section of jurisdiction shell body 1, and the axial of outer casing body 11 is the same with the axial of section of jurisdiction shell body 1.
A plurality of partition plates 12 can be arranged in the outer shell body 11, and the number of the partition plates 12 can be set as required, such as three, four, five and the like. The face of every baffle 12 all can be perpendicular to the axis direction of outer casing body 11, and a plurality of baffle 12 is spaced apart along the axial of outer casing body 11 to separate into a plurality of subchambers with the inner space of section of jurisdiction outer casing 1, and every subchamber all extends along the circumference of outer casing body 11. By arranging the partition plate 12 in the outer shell body 11, on one hand, the outer shell body 11 is supported by the partition plate 12, so that the rigidity of the duct piece outer shell 1 is enhanced, and the possibility of buckling of the outer shell body 11 before the concrete 3 is crushed is reduced; on the other hand, the partition plates 12 divide the inner space of the segment shell body 1 into a plurality of sub-chambers, so that the spiral ribs 2 can be placed conveniently.
It is understood that the partition plate 12 in the present application may also be constructed as a steel member, and the plurality of partition plates 12 may be integrally formed with the outer shell body 11, but of course, the plurality of partition plates 12 may also be installed in the outer shell body 11 by welding.
Specifically, the spiral ribs 2 are arranged in at least part of the plurality of sub-chambers. In this embodiment, all be provided with a spiral rib 2 in every subchamber, can be that a subchamber at every interval sets up a spiral rib 2 in other embodiments, when specifically setting up 2 numbers of spiral rib, can shield the bearing capacity of section of jurisdiction according to required design and design, the shield of required design constructs the section of jurisdiction bearing capacity and requires more, and the number of spiral rib 2 can be more.
The concrete 3 includes: core concrete 31 flowing into the space defined by the spiral beads 2 and sandwich concrete 32 flowing between the spiral beads 2 and the segment shell body 1. The spiral ribs 2 provide a restraint function for the core concrete 31; segment shell body 1 and spiral rib 2 provide compound restraint for core concrete 31, and segment shell body 1 also provides the restraint for intermediate layer concrete 32 simultaneously, has improved concrete 3's intensity to the bearing capacity of shield structure section of jurisdiction has been improved.
As an alternative, in order to improve the constraint effect of the spiral ribs 2 and the segment outer shell 1 on the concrete 3, the cross-sectional configuration of the sub-chamber is preferably designed to be rectangular, and further can be designed to be square. Through the design of square, bury spiral rib 2 underground in the positive middle part position of subchamber, make spiral rib 2 and the intermediate layer concrete 32 thickness between the section of jurisdiction shell body 1 more even relatively to the restraint effect of section of jurisdiction shell body 1 to intermediate layer concrete 32 has been improved.
Further, in an alternative embodiment of the present invention, the shield segment further comprises: annular rib 4, annular rib 4 sets up in the inner space of section of jurisdiction shell body 1, and annular rib 4 extends and is close to spiral rib 2 along the circumference of section of jurisdiction shell body 1. The annular ribs 4 are buried in the concrete 3 to provide annular bearing capacity for the shield segment, and the bearing capacity of the shield segment is further improved.
In particular, the annular bead 4 is arranged inside the space defined by the spiral bead 2 or outside the space defined by the spiral bead 2, in this embodiment the annular bead 4 is arranged inside the space defined by the spiral bead 2. And the annular ribs 4 are fixedly connected with the spiral ribs 2.
Through fixing spiral rib 2 on annular rib 4 for spiral rib 2 and annular rib 4 form a additional strengthening assembly, thereby can further improve the bearing capacity of shield structure section of jurisdiction. In addition, the annular ribs 4 can also serve for positioning the spiral ribs 2.
The spiral rib 2 comprises a plurality of spiral parts 21, each spiral part 21 is fixedly connected with the annular rib 4, the fixedly connected mode can be in binding connection or welding connection, and the binding connection is realized in the embodiment. The extension length of each spiral portion 21 is controlled by connecting each spiral portion 21 to the annular bead 4. Preferably, the extension length of each spiral part 21 is equal, so that the spiral rib 2 can uniformly restrain the core concrete 31, and the restraint effect of the spiral rib 2 on the core concrete 31 is improved.
Preferably, the annular bead 4 is designed in a plurality and a plurality of said annular beads 4 are spaced apart in the circumferential direction of the spiral bead 2. The number of the annular ribs 4 in the embodiment is four, and the number of the annular ribs 4 in other embodiments can be other numbers. A plurality of annular ribs 4 further provide the hoop bearing capacity for the shield constructs the section of jurisdiction, and is a plurality of annular ribs 4 are spaced apart along spiral rib 2's circumference, and every spiral portion 21 all with a plurality of annular ribs 4 rigid couplings, further improve the homogeneity of spiral portion 21, improve spiral rib 2 to core concrete 31's restraint effect. Preferably, the number of the annular ribs 4 is even (for example, two or six), and the even annular ribs 4 are symmetrically arranged in the axial direction and the radial direction of the shield segment, so that the annular ribs 4 are stressed uniformly.
In order to facilitate assembling of shield segments, in the embodiment of the present application, the outer shell body 11 includes: two first end pieces 13 that are located the ascending both ends of circumference of shell body 11 are provided with a plurality of first through-holes 131 that supply the bolt to wear to establish that evenly arrange in the axial of shell body 11 on every first end piece 13, and when the mouth of pipe of a shell body 11 corresponds the concatenation with the mouth of pipe of another shell body 11, the first end piece 13 of two shell body 11 mouths of pipe also corresponds the laminating, and the first through-hole 131 on the first end piece 13 of laminating each other also one-to-one. When two adjacent shield segments in the circumferential direction are connected with each other, bolts are firstly used to penetrate through the two first end segments 13 attached to each other through the first through holes 131 and are fastened through nuts.
Two ends of the axial direction of the outer shell body 11 are respectively provided with two second end pieces 14, and the planes of the second end pieces 14 are perpendicular to the axial direction of the outer shell body 11. A plurality of spaced second through holes 141 for bolts to pass through are uniformly arranged on each second end piece 14 in the circumferential direction of the outer housing body 11. When two axially adjacent segment shell bodies 1 are spliced, the second end pieces 14 on the two segment shell bodies 1 are attached to each other, and the second through holes 141 on the two segment shell bodies 1 correspond to each other. When two shield segments adjacent to each other in the axial direction are connected to each other, a bolt is used to pass through the two second end segments 14 attached to each other through the second through hole 141 and is fastened by a nut.
Referring to fig. 1 and 4, in order to improve the connection strength between two circumferentially adjacent shield segments, preferably, the sub-chambers are provided with hollow portions 111 at two circumferential ends of the segment outer shell 1, where concrete 3 is not poured, and the spiral ribs 2 extend into the corresponding hollow portions 111 at two circumferential ends of the segment outer shell 1. When two shield segments adjacent in the circumferential direction are connected through the bolts, the concrete 3 can be poured into the vacant parts 111 in the two shield segments again through on-site punching or reserved holes, and the concrete 3 poured later connects the originally poured concrete 3 in the two shield segments, so that the connection strength of the two shield segments adjacent in the circumferential direction is improved.
Further, as an optional scheme, the anti-corrosion coating is coated on at least one side surface of the segment outer shell 1 far away from the axis of the segment outer shell, so that the possibility that the segment structure is corroded by underground water, harmful liquid and gas is reduced.
A method for manufacturing a shield segment according to an embodiment of the present application is described below with reference to fig. 6.
The shield segment manufacturing method comprises at least the following steps:
s1: prefabricating an arc-shaped duct piece outer shell 1, spiral ribs 2 and annular ribs 4;
s2: placing spiral ribs 2 and annular ribs 4 inside the segment outer shell 1, wherein the spiral ribs 2 and the annular ribs 4 extend along the circumferential direction of the segment outer shell 1;
s3: concrete 3 is poured into the segment shell 1 to at least partially cover the spiral ribs 2 and the annular ribs 4.
According to the shield segment manufactured by the manufacturing method provided by the embodiment of the invention, the spiral ribs 2 are embedded in the concrete 3 of the segment, the core concrete 31 in the segment shell 1 is restrained by the spiral ribs 2, and the bearing capacity of the shield segment is further improved, so that when the shield segment is designed, the thickness of the segment can be correspondingly reduced on the premise of meeting the requirement of the bearing capacity, the effects of reducing the material consumption, improving the material utilization rate and reducing the production cost are achieved, in addition, the excavation amount of a tunnel in the construction process can be reduced by reducing the thickness of the shield segment, and the construction efficiency is improved.
Further, the segment outer shell 1 further comprises an outer shell body 11 and a partition plate 12 arranged in the outer shell body 11, wherein the partition plate 12 is suitable for dividing the space in the outer shell body 11 into a plurality of sub-chambers. The plate surface of the partition plate 12 is perpendicular to the axial direction of the outer case body 11. The partition plate 12 is used for supporting the whole segment shell body 1, the rigidity of the segment shell body 1 is enhanced, and the possibility of buckling of the segment shell body 1 in advance is reduced.
Further, in an optional embodiment of the present invention, step S2 further includes: placing said helical ribs 2 at least partially within said plurality of sub-chambers. The composite restraint is provided for the core concrete 31 through the segment shell 1 and the spiral ribs 2, so that the bearing capacity of the shield segment is improved; when the shield segment is designed, according to the design of the bearing capacity, the spiral ribs 2 are arranged in at least part of the sub-chambers, so that the production cost of the shield segment is reduced.
The concrete 3 flowing into the spiral beads 2 is configured as core concrete 31, and the concrete 3 flowing between the spiral beads 2 and the segment shell 1 is configured as sandwich concrete 32. The spiral ribs 2 provide a strong constraint effect for the core concrete 31; segment shell body 1 and spiral rib 2 provide compound restraint for inside core concrete 3, and segment shell body 1 also provides the restraint for intermediate layer concrete 32 simultaneously to the bearing capacity of shield structure section of jurisdiction has been improved.
Further, in another alternative embodiment of the invention, the cross-section of the sub-chamber is configured as a square. Through placing spiral rib 2 in the positive middle position of subchamber, make the intermediate layer concrete 32 thickness between spiral rib 2 and the section of jurisdiction shell body 1 more even relatively to the restraint effect of section of jurisdiction shell body 1 to intermediate layer concrete 32 has been improved.
The manufacturing method of the shield segment further comprises the following steps: step S4: and (3) maintaining the core concrete 31 and the interlayer concrete 32, and chiseling the concrete 3 at the two ends of the shield segment after the core concrete 31 and the interlayer concrete 32 reach the required strength to obtain the segment prefabricated component.
Further, both ends of the core concrete 31 and the interlayer concrete 32 in the circumferential direction of the segment shell 1 are subjected to a roughening treatment. Through carrying out chisel hair processing to core concrete 31 and intermediate layer concrete 32 at section of jurisdiction shell body 1 ascending both ends of circumference, when being convenient for follow-up when assembling the shield segment, the concrete 3 of the adjacent shield segment in circumference is connected through the concrete 3 of back pouring.
Further, in another alternative embodiment of the present invention, in step S2, an annular rib 4 is also placed inside the segment outer shell 1, the annular rib 4 extending in the circumferential direction of the segment outer shell 1 and being adjacent to the spiral rib 2. The annular ribs 4 are buried in the concrete 3 to provide annular bearing capacity for the shield segment, and the bearing capacity of the shield segment is improved.
In this embodiment, the annular ribs 4 are formed by bending reinforcing steel bars, and in other embodiments, the annular ribs 4 may also be arc-shaped steel pipes. Therefore, the weight of the shield segment can be further reduced, and the overall cost of the shield segment is reduced.
Further, the annular bead 4 is plural and plural annular beads 4 are provided inside or outside the spiral bead 2. In the present embodiment a plurality of annular ribs 4 are provided inside the spiral rib 2. A plurality of annular ribs 4 can with spiral rib 2 fixed connection, not only can form an integral reinforcement structure from this, a plurality of annular ribs 4 can also fix a position spiral rib 2 simultaneously, can adjust the size in clearance on the spiral rib 2 simultaneously.
Further, the spiral rib 2 comprises: a plurality of sequentially adjacent spiral portions 21; before the spiral ribs 2 are placed inside the segment shell body 1, annular ribs 4 are fixedly connected with the spiral ribs 2 to adjust the lengths of the plurality of spiral parts 21 in the extending direction of the spiral ribs 2.
Specifically, each spiral portion 21 is fixedly connected with the annular rib 4, and the spiral portion 21 and the annular rib 4 are connected by binding in the embodiment, and may also be welded in other embodiments.
Through above-mentioned technical scheme, can control the extension length of each spiral portion 21 on the one hand with annular rib 4 and spiral rib 2 fixed connection, on the other hand be convenient for the staff through annular rib 4 before pouring concrete 3 location spiral rib 2. Before concreting 3, the staff fixes the two ends of the annular rib 4 through the positioning piece, thereby fixing the spiral rib 2 fixedly connected with the annular rib 4, suspending the spiral rib 2 in the segment shell body 1, and constraining the core concrete 31 by the spiral rib 2.
Further, the lengths of the plurality of spiral portions 21 in the extending direction of the spiral beads 2 are the same. Therefore, the spiral ribs 2 can uniformly restrain the core concrete 31, and the bearing capacity of the shield segment is improved.
Referring to fig. 5 and 7, an embodiment of the present application further provides a method for manufacturing a shield pipeline, in which a segment prefabrication assembly is transported to a construction site, and the segment prefabrication assembly is assembled by a shield machine, where the segment prefabrication assembly is a shield segment manufactured by the shield segment manufacturing method provided by the present application.
According to the method for manufacturing the shield pipeline, the segment outer shell 1 comprises the following steps: the outer shell comprises an outer shell body 11 and a partition plate 12 arranged in the outer shell body 11, wherein the partition plate 12 is suitable for dividing the space in the outer shell body 11 into a plurality of sub-chambers;
will the sub-chamber is in the ascending both ends of circumference of section of jurisdiction shell body 1 reserve out the vacancy portion 111 of not pouring concrete 3, will be adjacent two in circumference section of jurisdiction shell body 1 passes through the fastener fixed to at adjacent two concrete 3 is poured once more in vacancy portion 111.
Further, two axially adjacent segment outer shells 1 are fixed by fasteners.
Specifically, the outer case body 11 includes: two first end pieces 13 that are located the ascending both ends of circumference of shell body 11 are provided with a plurality of first through-holes 131 that supply the bolt to wear to establish that evenly arrange in the axial of shell body 11 on every first end piece 13, and when the mouth of pipe of a shell body 11 corresponds the concatenation with the mouth of pipe of another shell body 11, the first end piece 13 of two shell body 11 mouths of pipe also corresponds the laminating, and the first through-hole 131 on the first end piece 13 of laminating each other also one-to-one. When two adjacent shield segments in the circumferential direction are connected with each other, bolts are firstly used to penetrate through the two first end segments 13 attached to each other through the first through holes 131 and are fastened through nuts.
Two ends of the axial direction of the outer shell body 11 are respectively provided with two second end pieces 14, and the planes of the second end pieces 14 are perpendicular to the axial direction of the outer shell body 11. A plurality of spaced second through holes 141 for bolts to pass through are uniformly arranged on each second end piece 14 in the circumferential direction of the outer housing body 11. When two axially adjacent segment shell bodies 1 are spliced, the second end pieces 14 on the two segment shell bodies 1 are attached to each other, and the second through holes 141 on the two segment shell bodies 1 correspond to each other. When two shield segments adjacent to each other in the axial direction are connected to each other, a bolt is used to pass through the two second end segments 14 attached to each other through the second through hole 141 and is fastened by a nut.
Further, as an optional scheme, before two adjacent first end pieces 13 on two circumferentially adjacent outer shell bodies 11 are attached to each other, a circle of sealant is applied to the side faces of the two adjacent first end pieces 13, which face each other, and then two shield segments are circumferentially spliced by using bolts; before two adjacent second end pieces 14 on two axially adjacent outer shell bodies 11 are mutually attached, coating sealant on the side surfaces of the two second end pieces 14, which are opposite to each other, and then axially splicing the two shield segments by using bolts; and the possibility of penetration of the shield pipeline is reduced by smearing the sealant at the joint of the shield segment.
It should be noted that in the present embodiment, the shield pipeline is formed by assembling shield segments through joints, and in other embodiments, the shield pipeline may also be formed by assembling shield segments through joints.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
In the description of the present application, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present application, "a plurality" means two or more.
In the description of the present application, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact not directly but via another feature therebetween.
In the description of the present application, the first feature being "on," "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (14)
1. The shield segment manufacturing method is characterized by at least comprising the following steps:
s1: prefabricating an arc-shaped duct piece outer shell (1), spiral ribs (2) and annular ribs (4);
s2: placing spiral ribs (2) inside the segment outer shell (1), wherein the spiral ribs (2) extend along the circumferential direction of the segment outer shell (1);
s3: pouring concrete (3) into the segment shell (1) to encapsulate at least part of the spiral tendons (2).
2. The shield segment manufacturing method according to claim 1, wherein the segment outer shell (1) comprises: the outer shell body (11) and set up baffle (12) in outer shell body (11), baffle (12) are suitable for with space partition in outer shell body (11) is a plurality of subchambers.
3. The shield segment manufacturing method according to claim 2, wherein the step S2 includes: placing the helical ribs (2) at least partially within the plurality of sub-chambers.
4. The shield segment manufacturing method of claim 2, wherein the sub-chamber is configured to be rectangular in cross-section.
5. The shield segment manufacturing method according to any one of claims 2-4, wherein the concrete flowing into the interior of the spiral rib (2) is configured as core concrete (31), and the concrete flowing between the spiral rib (2) and the segment outer shell (1) is configured as sandwich concrete (32).
6. The shield segment manufacturing method according to claim 5, further comprising: step S4: and curing the core concrete (31) and the interlayer concrete (32), and obtaining the segment precast assembly after the core concrete (31) and the interlayer concrete (32) reach the required strength.
7. The shield segment manufacturing method according to claim 6, wherein both ends of the core concrete (31) and the interlayer concrete (32) in the circumferential direction of the segment outer shell (1) are gouged.
8. The shield segment manufacturing method according to claim 1, characterized in that an annular rib (4) is placed inside the segment outer shell (1), the annular rib (4) extending in the circumferential direction of the segment outer shell (1) and being adjacent to the spiral rib (2).
9. The shield segment manufacturing method according to claim 8, wherein the annular bead (4) is plural and the plural annular beads (4) are provided inside or outside the spiral bead (2).
10. The shield segment manufacturing method according to claim 8 or 9, characterized in that the spiral ribs (2) comprise: a plurality of sequentially adjacent spiral parts (21); before the spiral ribs (2) are placed inside the segment shell body (1), annular ribs (4) are fixedly connected with the spiral ribs (2) so as to adjust the lengths of the spiral parts (21) in the extending direction of the spiral ribs (2).
11. The shield segment manufacturing method according to claim 10, wherein the lengths of the plurality of spiral portions (21) in the extending direction of the spiral ribs (2) are the same.
12. A shield tunnel manufacturing method, characterized in that segment prefabrication components are transported to a construction site and assembled by a shield machine, wherein the segment prefabrication components are shield segments manufactured by the shield segment manufacturing method according to any one of claims 1 to 10.
13. The shield tunnel manufacturing method according to claim 12, characterized in that the segment outer shell (1) comprises: the device comprises an outer shell body (11) and a partition plate (12) arranged in the outer shell body (11), wherein the partition plate (12) is suitable for dividing the space in the outer shell body (11) into a plurality of sub-chambers;
will the subchamber is in vacancy portion (111) of not pouring concrete (3) are reserved to the ascending both ends in circumference of section of jurisdiction shell body (1), will circumferentially adjacent two section of jurisdiction shell body (1) is fixed through the fastener to adjacent two concrete (3) are poured once more in vacancy portion (111).
14. The shield tunnel manufacturing method according to claim 13, wherein two axially adjacent segment outer casings (1) are fixed by a fastener.
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| CN202210488289.0A CN114872184B (en) | 2022-05-06 | 2022-05-06 | Method for manufacturing shield segment and method for manufacturing shield pipeline |
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| CN202210488289.0A CN114872184B (en) | 2022-05-06 | 2022-05-06 | Method for manufacturing shield segment and method for manufacturing shield pipeline |
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| CN114872184B (en) | 2023-12-22 |
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