CN112454608A - Shallow-earthing large-diameter shield negative ring pipe piece structure and manufacturing method thereof - Google Patents
Shallow-earthing large-diameter shield negative ring pipe piece structure and manufacturing method thereof Download PDFInfo
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- CN112454608A CN112454608A CN202011261520.XA CN202011261520A CN112454608A CN 112454608 A CN112454608 A CN 112454608A CN 202011261520 A CN202011261520 A CN 202011261520A CN 112454608 A CN112454608 A CN 112454608A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 108
- 239000010959 steel Substances 0.000 claims abstract description 108
- 210000001503 joint Anatomy 0.000 claims abstract description 26
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 11
- 238000004873 anchoring Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 11
- 239000002689 soil Substances 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 7
- 238000005452 bending Methods 0.000 abstract description 9
- 230000003014 reinforcing effect Effects 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- 238000009415 formwork Methods 0.000 description 5
- 239000003351 stiffener Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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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
-
- 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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- 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
- E21D11/086—Methods of making concrete lining segments
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- Mining & Mineral Resources (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a negative ring canal sheet structure of a shallow earth covering large-diameter shield and a manufacturing method thereof, wherein the negative ring canal sheet structure comprises a plurality of pipe sheet blocks which are spliced into a ring shape; the pipe piece blocks are of a reinforced concrete structure, and steel box bodies are buried at the butt joint end parts of the pipe piece blocks; when two adjacent pipe piece pieces are spliced and connected, the steel box bodies at the butt joint end parts of the pipe piece pieces are in butt joint connection. According to the negative ring duct piece structure, the steel box body is embedded at the butt joint end part of the duct piece block, so that the bending resistance bearing capacity at the joint position of the duct piece block is improved, the whole ring deformation resistance of the negative ring duct piece structure is further improved, deformation is not easy to occur under the reverse acting force of a shield machine, and the whole roundness is good. When the segment blocks are spliced and connected, the corresponding steel box bodies are in butt joint connection, so that the negative ring tube segment structure is simple, convenient and quick to mount and dismount. In addition, compared with an all-steel pipe piece structure, the negative ring pipe piece structure is low in cost and good in practicability and economical efficiency.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a shallow-earthing large-diameter shield negative ring pipe sheet structure and a manufacturing method thereof.
Background
With the rapid development of urban construction, urban underground spaces are widely developed and applied, and meanwhile, as early extensive ground planning construction causes the urban underground spaces, particularly the underground spaces in urban core areas, to be tense day by day, shield tunnel construction develops towards the direction of large-diameter shallow earth covering starting and receiving. In the traditional shield method construction process, a negative ring segment needs to be added in a tunnel excavated by the shield machine in the starting stage and serves as a support structure for providing counter force by pushing a machine body, and the requirement on structural strength can be met.
And current section of jurisdiction burden ring generally adopts reinforced concrete structure or all steel construction, and reinforced concrete section of jurisdiction's structural configuration is comparatively complicated, and under no hoop pressure effect condition, whole ring resistance to deformation ability is more weak, and easy deformation leads to the whole circularity of burden ring section of jurisdiction poor when receiving the reverse effort of shield structure machine, and the installation is dismantled complicacy. The whole ring of all-steel section of jurisdiction resistance to deformation can be strong, but the expense is higher, can not compromise the problem of practicality and economic nature simultaneously, has reduced the practicality of all-steel structure as the burden ring section of jurisdiction.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a shallow-soil-covering large-diameter shield negative ring pipe piece structure and a manufacturing method thereof, and solves the problems that the existing reinforced concrete negative ring pipe piece is weak in deformation resistance, poor in whole roundness and high in structural cost of an all-steel negative ring pipe piece.
The technical scheme for realizing the purpose is as follows:
the invention provides a shallow-earthing large-diameter shield negative ring pipe sheet structure which comprises a plurality of pipe sheet blocks which are spliced into a ring shape;
the pipe piece blocks are of a reinforced concrete structure, and steel box bodies are buried at the butt joint end parts of the pipe piece blocks;
when two adjacent pipe piece pieces are spliced and connected, the steel box bodies at the butt joint end parts of the pipe piece pieces are in butt joint connection.
According to the negative ring duct piece structure, the steel box body is embedded at the butt joint end part of the duct piece block, so that the bending resistance bearing capacity at the joint position of the duct piece block is improved, the whole ring deformation resistance of the negative ring duct piece structure is further improved, deformation is not easy to occur under the reverse acting force of a shield machine, and the whole roundness is good. When the segment blocks are spliced and connected, the corresponding steel box bodies are in butt joint connection, so that the negative ring tube segment structure is simple, convenient and quick to mount and dismount. In addition, compared with an all-steel pipe piece structure, the negative ring pipe piece structure is low in cost and good in practicability and economical efficiency.
The shallow-earthing large-diameter shield negative ring pipe piece structure is further improved in that the corresponding side face of the steel box body is flush with the corresponding end face of the pipe piece block, and when two adjacent pipe piece blocks are spliced and connected, the corresponding side faces of the steel box body on the two pipe piece blocks are oppositely attached and are fixedly connected through a connecting piece.
The shallow-soil-covering large-diameter shield negative ring pipe piece structure is further improved in that the pipe piece blocks are provided with an inner arc surface and an outer arc surface which are arranged oppositely;
the bottom surface of the steel box body is flush with the inner cambered surface;
and a space is reserved between the top surface of the steel box body and the outer arc surface.
The shallow soil covering large-diameter shield negative ring pipe piece structure is further improved in that the steel box body comprises a bottom plate, a side plate vertically connected to one side of the bottom plate, a plurality of rib plates vertically connected to the side plate and the bottom plate, a top end plate connected to the end parts of the two rib plates and connected with the side plate, and a side end plate connected to the end parts of the two rib plates and connected with the bottom plate;
the side end plates, the top end plate, the two rib plates, the bottom plate and the side plates are enclosed to form a box-shaped structure with a hollow interior, and a gap is reserved between the two box-shaped structures.
The shallow-soil-covering large-diameter shield negative ring pipe piece structure is further improved in that a threaded connecting sleeve is embedded in a gap between the pipe piece blocks and the box-type structure, and when two adjacent pipe piece blocks are connected in a splicing mode, a threaded fastener is screwed in the corresponding threaded connecting sleeve to achieve fastening connection of the two pipe piece blocks.
The invention also provides a manufacturing method of the shallow-soil-covered large-diameter shield negative ring pipe sheet structure, which comprises the following steps:
dividing the negative ring pipe piece structure into a plurality of negative ring pipe segments according to the shape of the negative ring pipe piece structure, and manufacturing a pipe piece template matched with the shape of the negative ring pipe segments;
segment steel bars are bound in the segment template;
providing a steel box body, arranging the steel box body in the segment template, and attaching the steel box body to the segment template positioned at the end part; and
and pouring concrete into the duct piece template to prepare duct piece blocks, splicing the duct piece blocks into a ring to obtain a negative ring duct piece structure, and butting and connecting steel boxes at the end parts of the duct piece blocks when splicing two adjacent duct piece blocks.
The manufacturing method of the shallow-soil-covering large-diameter shield negative ring pipe sheet structure is further improved in that when the steel box bodies at the end parts of the pipe sheet blocks are in butt joint connection, the side surfaces of the two steel box bodies are attached to each other, and then the two steel box bodies are connected through the connecting piece in a fastening mode.
The manufacturing method of the shallow soil covering large-diameter shield negative ring pipe piece structure is further improved in that the pipe piece template comprises an inner side template for forming an inner arc surface of the pipe piece block and an outer side template for forming an outer arc surface of the pipe piece block;
when the steel box body is arranged in the segment template, the steel box body is arranged on the inner side template, and a space is reserved between the steel box body and the outer side template.
The manufacturing method of the shallow-soil-covering large-diameter shield negative ring pipe sheet structure is further improved in that the provided steel box body comprises a side plate and a plurality of box-type structures formed on one side surface of the side plate, and a gap is reserved between every two adjacent box-type structures; the manufacturing method further comprises the following steps:
and providing a threaded connection sleeve, arranging the threaded connection sleeve in the gap and connecting the threaded connection sleeve with the side plate, and embedding the threaded connection sleeve in the segment block after the segment block is manufactured.
The further improvement of the manufacturing method of the shallow soil covering large-diameter shield negative ring pipe sheet structure is that the method further comprises the following steps:
providing anchoring ribs and anchoring plates, and fixedly connecting the anchoring ribs and the anchoring plates to the side faces, close to the inner sides of the segment templates, of the steel box body.
Drawings
FIG. 1 is a transverse sectional view of the structure of the shallow earthing large-diameter negative circular tube sheet of the invention.
Figure 2 is a front view of the butt end of the shallow casing large diameter negative collar plate structure of the present invention.
Fig. 3 is a longitudinal sectional view of the structure of the shallow casing large-diameter negative ring canal piece of the invention.
Fig. 4 is a transverse sectional view showing the segment reinforcing steel bars of the shallow casing soil large-diameter negative ring tube segment structure of the invention.
Fig. 5 is a longitudinal sectional view at the steel case of fig. 4.
Fig. 6 is a longitudinal sectional view at the joint of fig. 4.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the invention provides a shallow-earthing large-diameter negative annular pipe piece structure and a manufacturing method thereof, and aims to solve the problems that the conventional reinforced concrete negative annular pipe piece has low structural strength safety, weak deformation resistance, poor roundness and time-consuming and labor-consuming installation and disassembly processes for large-diameter shield construction initiated by shallow earthing. According to the negative ring pipe piece structure, the steel box bodies are embedded at the butt joint end parts of the pipe piece blocks, the steel box bodies are attached and correspondingly connected when the pipe piece blocks are in butt joint, and the bending resistance bearing capacity of the butt joint of the pipe piece blocks is increased through the arranged steel box bodies, so that the whole ring deformation resistance of the negative ring pipe piece structure is remarkably improved, the whole circle degree is good, the structural strength for providing a propelling counter force for a starting stage of a shallow-soil-covering large-diameter shield meets the requirement, and the installation and disassembly processes of the negative ring pipe piece structure are safe and rapid. The structure of the shallow soil covering large-diameter negative circular tube sheet and the manufacturing method thereof are explained below with reference to the accompanying drawings.
Referring to fig. 1, a transverse cross-sectional view of the shallow casing large diameter negative loop pipe sheet structure of the present invention is shown. The structure of the shallow earth covering large-diameter shield negative ring pipe sheet of the invention is explained with reference to fig. 1.
As shown in fig. 1, the shallow soil covering large-diameter shield negative circular tube sheet structure of the present invention includes a plurality of circular tube sheet blocks 21, each tube sheet block 21 is a reinforced concrete structure, and as shown in fig. 3, a steel box 22 is embedded at the butt joint end 211 of the tube sheet block 21, and when two adjacent tube sheet blocks 21 are connected, the steel box 22 at the butt joint end 211 of the tube sheet block 21 is connected in a butt joint manner.
Preferably, the shape of the negative ring pipe piece structure is consistent with the shape of the pipe piece in shield construction, if the negative ring pipe piece structure is a circular shield, the shape of the negative ring pipe piece structure is a circular, if the negative ring pipe piece structure is a rectangular shield, the shape of the negative ring pipe piece structure is a rectangular. As shown in fig. 1, the two ends of the pipe piece 21 in the circumferential direction X are butt joint ends 211, the butt joint ends 211 are used for butt joint with other pipe pieces 21, the plurality of pipe pieces 21 are connected in a splicing manner along the circumferential direction to form an annular integral structure, so that a negative ring pipe piece structure is formed, the two ends of the pipe piece 21 in the longitudinal direction Y are joint ends, and the joint ends are used for butt joint with another negative ring pipe piece structure or a pipe piece of shield construction. The number and the shape of the pipe pieces 21 are designed according to the shape of the structure of the negative ring pipe piece, and the pipe pieces 21 are sequentially connected in a butt joint mode to form the negative ring pipe piece structure.
According to the negative ring pipe piece structure, the steel box body 22 is embedded in the butt joint end part 211 of the pipe piece block 21, and the bending resistance bearing capacity of the joint position (namely the joint position) of the pipe piece block 21 in the negative ring pipe piece structure is improved by utilizing the steel box body 22. The joint of the existing reinforced concrete segment structure is weak in connection, the anti-deformation capacity of the joint is smaller than that of the segment structure, and under the oppression of the shield reverse acting force, the existing reinforced concrete segment structure is easy to deform, so that the whole roundness of the reinforced concrete segment structure is poor. The invention improves the bending resistance bearing capacity of the joint of the segment block, can reduce the deformation under the reverse acting force of the shield, improves the deformation resistance of the whole ring of the negative ring pipe segment structure, and ensures the roundness of the negative ring pipe segment structure.
In one embodiment of the present invention, as shown in fig. 2 and 3, when the side face 2211 corresponding to the steel box 22 is flush with the end face corresponding to the segment block 21, that is, when the steel box 22 is buried in the segment block 21, the side face 2211 of the steel box 22 is exposed on the end face of the butt end 211 of the segment block 21, and the outer surface of the side face 2211 is flush with the end face of the butt end 211. As shown in fig. 1, when two adjacent pipe piece blocks 21 are connected, the side surfaces 2211 of the corresponding steel box 22 on the two pipe piece blocks 21 are attached to each other and fastened by a connector.
Preferably, the connecting member is a connecting bolt, the side 2211 of the steel box 22 is provided with a connecting hole 2222, after the side 2211 of the steel box 22 of the two pipe piece blocks 21 are attached to each other, the connecting bolt is inserted into the aligned connecting hole 2222, the two steel box 22 are connected and fixed through the connecting bolt, and then the two pipe piece blocks 21 are connected together. As shown in fig. 3, in order to facilitate the installation and detachment of the connection bolt, a hand hole is formed in the bottom plate 221 of the steel box 22 at the intrados 212 of the pipe piece 21 corresponding to the position of the connection bolt, and the hand hole is used to facilitate the insertion of the hand of the constructor into the box structure of the steel box 22 for the fastening and detachment operation of the connection bolt.
In one embodiment of the present invention, as shown in fig. 2, the length of the side 2211 of the steel box 22 is matched to the length of the butt end 211 of the segment block 21, and the width of the side 2211 is smaller than the width of the butt end 211.
Further, as shown in fig. 2 and 3, the steel box body 22 includes a bottom plate 221, side plates 222, a plurality of ribs 223, a top end plate 224 and side end plates 225, wherein the side plate 222 is vertically connected to one side of the bottom plate 221, the bottom plate 221 and the side plate 222 are connected to each other and are L-shaped when viewed from the side, the plurality of ribs 223 are arranged at intervals, the ribs 223 are vertically connected to the side plates 222 and the bottom plate 221, the top end plate 224 is connected to the top ends of the two ribs 223 and is connected to the side plate 222, and the side end plates 225 are connected to the side ends of the two ribs 223 and is connected to the bottom plate 221, as shown in fig. 1, so that the side end plates 225 and the top end plate 224, the two ribs 223, the bottom plate 221 and the side plate 222 enclose a box-shaped structure with a hollow. After the steel box 22 is placed in the segment formwork and concrete is poured, the poured concrete fills the gap 226, so that the steel box 22 can be well buried.
In order to improve the connection strength between the pipe piece blocks 21, as shown in fig. 4 and 6, a threaded connection sleeve 23 is arranged at a gap between box-type structures, the threaded connection sleeve 23 is connected with a side plate 222 of the steel box 22, as shown in fig. 2, a threaded hole 2223 is formed in the side plate 222 corresponding to the threaded connection sleeve 23, after the pipe piece blocks 21 are formed, the threaded connection sleeve 23 is embedded in the pipe piece block 21, and when two adjacent pipe piece blocks 21 are spliced, the two adjacent pipe piece blocks 21 are screwed in the corresponding threaded connection sleeve 23 through a threaded fastener 24 so as to realize the fastening connection of the two pipe piece blocks 21.
Further, the threaded connecting sleeve 23 is embedded in the pipe piece 21 in an inclined manner, after the abutting end portions 211 of the two pipe pieces 21 are attached to each other, the threaded connecting sleeves 23 at the abutting end portions 211 are abutted to each other, the end portion of the threaded connecting sleeve 23 at one abutting end portion 211 is communicated with an operation hole 215 arranged at the inner arc surface 212 of the pipe piece 21, the threaded fastener 24 can be penetrated through the operation hole 215, the threaded fastener 24 is screwed with the threaded connecting sleeves 23 at the abutting end portions, and the two pipe pieces 21 are fastened and connected.
In one embodiment of the present invention, as shown in fig. 3, the pipe piece 21 has an inner arc surface 212 and an outer arc surface 213 that are opposite to each other, the bottom surface of the steel box 22 is flush with the inner arc surface 212, and a space is left between the top surface of the steel box 22 and the outer arc surface 213. When the steel case 22 is embedded in the segment block 21, the bottom plate 221 of the steel case 22 is placed on the segment form, so that the bottom surface of the bottom plate 221 is exposed to the intrados 212 of the segment block 21 and is flush with the intrados 212 after the concrete is poured.
Further, a reinforcing rib 251 is fixedly connected to a side surface of the steel case 22 corresponding to the outer arc surface 213 of the tube piece 21, the reinforcing rib 251 is perpendicularly connected to the side surface of the steel case 22 and extends toward the outer arc surface 213 of the tube piece 21, and bends toward the inside of the tube piece 21 when approaching the outer arc surface 213 of the tube piece 21 and extends, so as to form a bending section 2511. The arranged reinforcing ribs 251 are used for increasing the anchoring strength of the steel box body 22 embedded and fixed in the pipe piece block 21.
Preferably, the stiffener 251 is vertically connected to the top end plate 224, and the bending section 2511 of the stiffener 251 is disposed near the outer arc surface 213 of the tube sheet 21, and the direction of the bending section 2511 is consistent with the direction of the outer arc surface 213. The top end plate 224 is provided with a plurality of reinforcing ribs 251, the reinforcing ribs 251 in the same row are fixedly connected, and the end part of the bending section 2511 of the former reinforcing rib is fixedly connected with the latter reinforcing rib.
Still further, as shown in fig. 3, the anchoring ribs 252 and the anchoring plate 26 are fixedly connected to the side surface of the steel box 22 near the inside of the tube sheet block 21. The anchoring strength of the steel box 22 is increased by the anchoring ribs 252 and the anchoring plate 26. Preferably, the anchoring ribs 252 and the anchoring plates 26 are fixedly connected to the side end plates 225 of the steel box body 22, and a plurality of anchoring ribs 252 and anchoring plates 26 are provided, and the anchoring ribs 252 and the anchoring plates 26 are extended toward the inside of the tube piece 21.
As shown in fig. 4 to 6, the segment steel bars 214 are disposed in the segment block 21, the segment steel bars 214 include transverse bars, longitudinal bars and stirrups, the transverse bars and the longitudinal bars are connected in a staggered manner to form reinforcing meshes, the reinforcing meshes are disposed on the upper side and the lower side of the segment block 21, i.e., on the side close to the outer arc surface 213 and on the side close to the inner arc surface 212, and a plurality of stirrups are hooped between the two reinforcing meshes. The segment steel bars 214 are placed in the segment formwork, the steel box body 22 is placed in the segment formwork, the steel box body 22 and the segment steel bars 214 are fixedly connected, reinforcing ribs 251, anchoring pieces 252 and anchoring plates 26 arranged on the steel box body 22 are fixedly connected with the segment steel bars 214 uniformly, and concrete is poured into the segment formwork to form the segment blocks 21.
As shown in fig. 2, a positioning hole 2224 is further formed in the side plate 222 of the steel box 22, and a positioning sleeve is connected to the positioning hole 2224 and disposed in the gap 226 of the steel box 22, so that the positioning sleeve is embedded in the tube sheet block 21. The positioning hole 2224 and the positioning sleeve are matched with the positioning hole and the positioning pin on the other segment block, so that the positioning function is realized, and the two segment blocks can be quickly aligned.
Two connecting holes 2222 are formed in the side plate 222 corresponding to one box-shaped structure and used for penetrating connecting threads to achieve connection between the two pipe piece blocks 21, and the two connecting holes 2222 are arranged at intervals up and down to improve connection strength.
As shown in fig. 1 and 2, the box-shaped structure size of the two ends of the steel box 22 close to the longitudinal direction Y is larger than that of other box-shaped structures, and the box-shaped structures close to the two ends of the longitudinal direction Y are provided with the rib plates 223, so that the structural strength of the end sides of the pipe piece blocks 21 close to the longitudinal direction Y can be enhanced by the additionally arranged rib plates 223.
The invention also provides a manufacturing method of the shallow-soil-covering large-diameter shield negative ring pipe sheet structure, which is explained below.
The invention relates to a manufacturing method of a shallow-earthing large-diameter shield negative ring pipe sheet structure, which comprises the following steps of:
dividing the negative ring pipe piece structure into a plurality of negative ring pipe segments according to the shape of the negative ring pipe piece structure, and manufacturing a pipe piece template matched with the shape of the negative ring pipe segments;
as shown in fig. 4-6, segment reinforcements 214 are bound in the segment template;
referring to fig. 1 to 3, a steel box body 22 is provided, the steel box body 22 is arranged in the segment template, and the steel box body 22 is attached to the segment template at the end; and
pouring concrete into the segment template to prepare the segment blocks 21, splicing the plurality of segment blocks 21 into a ring to obtain a negative ring segment structure, and butting and connecting the steel boxes 22 at the end parts of the segment blocks 21 when splicing two adjacent segment blocks.
In one embodiment of the present invention, as shown in fig. 3, when the steel cases 22 at the ends of the pipe piece block 21 are butted, the sides of the two steel cases 22 are butted, and then the two steel cases 22 are fastened and connected by the connecting member.
In one embodiment of the invention, the segment template comprises an inner side template for forming an inner arc surface of the segment and an outer side template for forming an outer arc surface of the segment;
as shown in fig. 4 and 5, when the steel box 22 is placed in the segment mold, the steel box 22 is placed on the inner mold with a space between the steel box 22 and the outer mold.
In a specific embodiment of the present invention, the method further includes:
as shown in fig. 3, the stiffeners 251 are provided, the stiffeners 251 are vertically attached to the sides of the steel casing 22 adjacent to the outside forms, and the stiffeners 251 are partially bent to form bent sections 2511 adjacent to the outside forms and extending toward the inside of the segment forms.
In a specific embodiment of the present invention, the method further includes:
as shown in fig. 3, anchoring ribs 252 and anchoring plates 26 are provided, and the anchoring ribs 252 and anchoring plates 26 are fixedly attached to the sides of the steel box adjacent the inside of the segment formwork.
In an embodiment of the present invention, the steel box 22 includes a bottom plate 221, side plates 222, ribs 223, a top end plate 224, and side end plates 225, wherein the side plates 222 are vertically connected to one side of the bottom plate 221, the bottom plate 221 and the side plates 222 are connected to each other and are L-shaped when viewed from the side, the ribs 223 are arranged in a plurality of intervals, the ribs 223 are vertically connected to the side plates 222 and the bottom plate 221, the top end plate 224 is connected to the top ends of the two ribs 223 and is connected to the side plates 222, the side end plates 225 are connected to the side ends of the two ribs 223 and is connected to the bottom plate 221, as shown in fig. 1, so that the side end plates 225 and the top end plate 224, the two ribs 223, the bottom plate 221, and the side plates 222 enclose a box-shaped structure with a hollow interior, and a gap 226 is. The side plate 222 is provided with a connecting hole 2222, a threaded hole 2223 and a positioning hole 2224, the connecting hole 2222 corresponds to a box-type structure, the threaded hole 2223 and the positioning hole 2224 correspond to a gap 226 between the box-type structures, the threaded connecting sleeve 23 is connected to the threaded hole 2223, and the positioning sleeve is connected to the positioning hole 2224. when the steel box 22 is embedded in the tube sheet block 21, the threaded connecting sleeve 23 and the positioning sleeve are both embedded in the tube sheet block 21, so that when two adjacent tube sheet blocks 21 are spliced, quick alignment can be realized through the positioning sleeve and the positioning pin, fixed connection is realized through the threaded connecting sleeve 23 and the threaded fastener 24, and further reinforced connection is realized through the connecting bolt and the connecting hole 2223.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A shallow-earthing large-diameter shield negative ring pipe sheet structure is characterized by comprising a plurality of pipe sheet blocks which are spliced into a ring shape;
the pipe piece blocks are of a reinforced concrete structure, and steel box bodies are buried at the butt joint end parts of the pipe piece blocks;
when two adjacent pipe piece pieces are spliced and connected, the steel box bodies at the butt joint end parts of the pipe piece pieces are in butt joint connection.
2. The shallow soil covering large-diameter shield negative ring pipe piece structure of claim 1, wherein the corresponding side surface of the steel box body is flush with the corresponding end surface of the pipe piece block, and when two adjacent pipe piece blocks are spliced, the corresponding side surfaces of the steel box body on the two pipe piece blocks are attached to each other and are tightly connected through a connecting piece.
3. The shallow casing large diameter shield negative ring pipe sheet structure of claim 1, wherein the pipe sheet block has an intrados surface and an extrados surface which are oppositely arranged;
the bottom surface of the steel box body is flush with the inner cambered surface;
and a space is reserved between the top surface of the steel box body and the outer arc surface.
4. The shallow earth covering large-diameter shield negative ring pipe sheet structure of claim 1, wherein the steel box body comprises a bottom plate, a side plate vertically connected to one side of the bottom plate, a plurality of ribs vertically connected to the side plate and the bottom plate, a top end plate connected to ends of the two ribs and connected to the side plate, and side end plates connected to ends of the two ribs and connected to the bottom plate;
the side end plates, the top end plate, the two rib plates, the bottom plate and the side plates are enclosed to form a box-shaped structure with a hollow interior, and a gap is reserved between the two box-shaped structures.
5. The shallow soil covering large-diameter shield negative ring pipe piece structure of claim 4, wherein a threaded connecting sleeve is embedded in a gap between the box-type structures of the pipe piece blocks, and when two adjacent pipe piece blocks are spliced and connected, a threaded fastener is screwed in the corresponding threaded connecting sleeve to realize the fastening and connection of the two pipe piece blocks.
6. A manufacturing method of a shallow-soil-covered large-diameter shield negative ring pipe sheet structure is characterized by comprising the following steps:
dividing the negative ring pipe piece structure into a plurality of negative ring pipe segments according to the shape of the negative ring pipe piece structure, and manufacturing a pipe piece template matched with the shape of the negative ring pipe segments;
segment steel bars are bound in the segment template;
providing a steel box body, arranging the steel box body in the segment template, and attaching the steel box body to the segment template positioned at the end part; and
and pouring concrete into the duct piece template to prepare duct piece blocks, splicing the duct piece blocks into a ring to obtain a negative ring duct piece structure, and butting and connecting steel boxes at the end parts of the duct piece blocks when splicing two adjacent duct piece blocks.
7. The method for manufacturing a shallow soil covering large-diameter shield negative ring pipe sheet structure as claimed in claim 6, wherein when the steel boxes at the end parts of the pipe sheet blocks are butted and connected, the side surfaces of the two steel boxes are butted and then are fastened and connected through the connecting piece.
8. The method for manufacturing a shallow soil covering large-diameter shield negative ring pipe piece structure as claimed in claim 6, wherein the pipe piece template comprises an inner template for forming an inner arc surface of the pipe piece block and an outer template for forming an outer arc surface of the pipe piece block;
when the steel box body is arranged in the segment template, the steel box body is arranged on the inner side template, and a space is reserved between the steel box body and the outer side template.
9. The method for manufacturing the shallow soil covering large-diameter shield negative ring pipe sheet structure as claimed in claim 6, wherein the provided steel box body comprises a side plate and a plurality of box-type structures formed on one side surface of the side plate, and a gap is reserved between every two adjacent box-type structures; the manufacturing method further comprises the following steps:
and providing a threaded connection sleeve, arranging the threaded connection sleeve in the gap and connecting the threaded connection sleeve with the side plate, and embedding the threaded connection sleeve in the segment block after the segment block is manufactured.
10. The method for manufacturing a shallow earth covering large-diameter shield negative ring pipe sheet structure of claim 6, further comprising:
providing anchoring ribs and anchoring plates, and fixedly connecting the anchoring ribs and the anchoring plates to the side faces, close to the inner sides of the segment templates, of the steel box body.
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