CN114474780B - Sandwich plate type shield tunnel segment anti-collision energy absorbing device and preparation method thereof - Google Patents
Sandwich plate type shield tunnel segment anti-collision energy absorbing device and preparation method thereof Download PDFInfo
- Publication number
- CN114474780B CN114474780B CN202011154962.4A CN202011154962A CN114474780B CN 114474780 B CN114474780 B CN 114474780B CN 202011154962 A CN202011154962 A CN 202011154962A CN 114474780 B CN114474780 B CN 114474780B
- Authority
- CN
- China
- Prior art keywords
- skin
- core layer
- foam core
- reinforcing rib
- reinforcing ribs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 91
- 239000012792 core layer Substances 0.000 claims abstract description 47
- 239000006260 foam Substances 0.000 claims abstract description 46
- 239000004744 fabric Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 4
- 239000011496 polyurethane foam Substances 0.000 claims description 4
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 claims description 3
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 claims description 3
- 229920000271 Kevlar® Polymers 0.000 claims description 3
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000004761 kevlar Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012945 sealing adhesive Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 239000003292 glue Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 7
- 230000006872 improvement Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
- E21D11/003—Linings or provisions thereon, specially adapted for traffic tunnels, e.g. with built-in cleaning devices
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a sandwich plate type shield tunnel segment anti-collision energy absorbing device which comprises a foam core layer, an upper skin and a lower skin, wherein the upper skin and the lower skin are arranged on the upper surface and the lower surface of the foam core layer; the contact surface of the upper skin and the foam core layer is provided with a first reinforcing rib, and the contact surface of the lower skin and the foam core layer is provided with a second reinforcing rib; the upper surface of the foam core layer is provided with a first groove matched with the first reinforcing rib in shape, and the lower surface of the foam core layer is provided with a second groove 5 matched with the second reinforcing rib in shape; the first reinforcing rib is embedded in the first groove, and the second reinforcing rib is embedded in the second groove 5. The invention also provides a preparation method of the sandwich plate type shield tunnel segment anti-collision energy absorbing device. The sandwich plate type shield tunnel segment anti-collision energy absorbing device provided by the invention can replace a steel plate and a damper, and is directly fixed on the inner wall of a segment by bolts or glue to be used as the anti-collision energy absorbing device.
Description
Technical Field
The invention provides a sandwich plate type shield tunnel segment anti-collision energy absorbing device, and also provides a preparation method of the device, belonging to the field of tunnel structures.
Background
Along with the continuous improvement of the mechanization degree and the manufacturing industry level in China, the shield construction technology has the advantages of small disturbance to stratum, small environmental influence, high construction speed and the like, and is increasingly applied to the construction of underground engineering facilities such as urban underground railways, high-speed railway tunnels and the like. Because the shield tunnel is a tunnel structure formed by splicing prefabricated lining segments through the joint fixing bolts, compared with a composite lining structure built by a mining method, the shield tunnel has relatively small overall rigidity, relatively poor structural stability and relatively weak anti-collision capability.
Railway and highway tunnels at home and abroad are mostly provided with non-tunnel body structures such as anti-collision walls, anti-collision piers and the like to solve the problem of collision of trains or automobiles. For train marshalling with large overall mass and high running speed, a secondary lining mode of molding inside a segment lining is generally adopted for coping, but the double-layer lining structure of the shield tunnel has higher manufacturing cost, longer construction period and poorer economy, so that the double-layer lining structure of the shield tunnel is difficult to ensure large-scale application in the shield tunnel.
Patent 201810012124X discloses an anti-collision energy-absorbing segment device for a shield tunnel, which is characterized in that a spring damper is arranged in a segment, and then an arc-shaped steel plate is fixed on the spring damper to play a role in collision prevention like a shield. The pipe piece has the defects that the structure is complex, the pipe piece is hollow, and the structural mechanical property of the pipe piece is weakened; and if the impact force is not strictly perpendicular to the arc-shaped steel plate, the damper may be bent and not have a buffering effect, so that the damper is rapidly damaged.
Disclosure of Invention
Technical problems: in order to overcome the defects in the prior art, the invention provides a sandwich plate type shield tunnel segment anti-collision energy absorbing device.
The technical scheme is as follows: the invention provides a sandwich plate type shield tunnel segment anti-collision energy absorbing device which comprises a foam core layer, an upper skin and a lower skin, wherein the upper skin and the lower skin are arranged on the upper surface and the lower surface of the foam core layer; the contact surface of the upper skin and the foam core layer is provided with a first reinforcing rib, and the contact surface of the lower skin and the foam core layer is provided with a second reinforcing rib; the upper surface of the foam core layer is provided with a first groove matched with the first reinforcing rib in shape, and the lower surface of the foam core layer is provided with a second groove 5 matched with the second reinforcing rib in shape; the first reinforcing rib is embedded in the first groove, and the second reinforcing rib is embedded in the second groove 5.
As an improvement, the upper skin and the first reinforcing ribs are integrally formed; the lower skin and the second reinforcing ribs are integrally formed.
As another improvement, the section of the first reinforcing rib is in an inverted trapezoid shape, the long side of the first reinforcing rib is embedded in the first groove, and the short side of the first reinforcing rib is connected with the upper skin; the section of the second reinforcing rib is in an inverted trapezoid shape, the long side of the second reinforcing rib is embedded in the second groove 5, and the short side of the second reinforcing rib is connected with the lower skin; the cross-sectional dimension of the first reinforcing rib is larger than that of the second reinforcing rib. The ribs of the upper skin have a larger cross-sectional dimension and smaller spacing than the ribs of the lower skin because the upper skin is directly subjected to the impact and therefore stronger to facilitate dispersion of the impact forces into the foam core. The cross section of the reinforcing rib is in an inverted trapezoid shape, so that the interface strength of the skin and the core layer is enhanced, the cross section size of the reinforcing rib of the upper skin is larger than that of the reinforcing rib of the lower skin, and the distance is smaller, because the upper skin directly bears the impact effect, the upper skin is stronger, and the impact force is dispersed into the foam core layer.
As another improvement, the thickness of the upper skin is greater than the thickness of the lower skin.
As another improvement, the core layer is a polyurethane foam core layer; the upper skin and the lower skin are respectively and independently GFRP skin, ultra high molecular weight polyethylene skin or Kevlar skin. Materials used for the core layer include, but are not limited to, flexible polyurethane foam, which has good elasticity. When the impact force is smaller, the deformation is smaller, and the device can be quickly recovered without damage or replacement.
As another improvement, the first reinforcing ribs and the second reinforcing ribs are criss-cross reinforcing ribs; the first reinforcing ribs and the second reinforcing ribs are FRP reinforcing ribs.
The invention also provides a preparation method of the sandwich plate type shield tunnel segment anti-collision energy absorbing device, which comprises the following steps:
(1) Criss-cross shallow grooves are engraved on the upper surface and the lower surface of the foam core layer, the distance between the shallow grooves is 20mm, the width is 2mm, and the depth is 2mm; a plurality of through holes are punched along the thickness direction of the foam core layer, the interval of the through holes is 20mm, and the diameter is 3mm;
(2) Widening grooves on the surface of the foam core layer according to the size of the reinforcing ribs, and arranging strip-shaped fiber fabrics in the grooves to serve as reinforcing phases of the reinforcing ribs;
(3) Coating a release agent on a glass flat plate mould, sequentially laying a lower panel fiber cloth, a foam core layer, an upper panel fiber cloth, a release cloth, a separation film and a flow guide net on the glass flat plate after the release agent is dried to form a film, and then arranging a rubber injection pipe and an exhaust pipe to form a preforming system;
(4) Packaging the preformed system by adopting a vacuum bag film, and bonding the vacuum bag film and a glass mold into a sealing system by using a sealing adhesive tape; connecting the exhaust pipe with a vacuum pump, pumping air in the closed system to vacuum, injecting resin into the closed system through a tee joint of the injection pipe, sucking the resin into a preforming system under the action of negative pressure, infiltrating fiber cloth and filling all gaps;
(5) And (5) after the resin is solidified, cutting to obtain a finished product.
The beneficial effects are that: the sandwich plate type shield tunnel segment anti-collision energy absorbing device provided by the invention can replace a steel plate and a damper, and is directly fixed on the inner wall of a segment by bolts or glue to be used as the anti-collision energy absorbing device.
The device has the advantages compared with the prior art that:
(1) The anti-collision plate is simple in structure and easy to replace, and after being crashed, the anti-collision plate is only required to be taken down originally and a new anti-collision plate is installed again by bolts or glue.
(2) The protection effect is good, and the sandwich board can bear the impact effect perpendicular to the board surface or not strictly perpendicular to the board surface because the sandwich layer can resist compression and shearing. The sandwich plate is only arranged on the outer surface of the duct piece, and the original structure of the duct piece is not affected basically.
(3) The designability is strong, and the thickness dimension and the reinforcing rib distribution of the sandwich panel are designed according to the requirement of the anti-collision performance.
The preparation method of the device adopts a VARI technology, the laid fiber reinforced material preformed body is sealed in a vacuum mold cavity, low-viscosity resin is injected into the mold cavity under the action of vacuum negative pressure, the resin is soaked in the reinforced material preformed body in the flowing process, all gaps in the mold cavity are filled, and the FRP component can be obtained after the resin is solidified. The VARI process has simple preparation process and low cost. In the VARI process, the adhesive layer between the panel and the face core is cured together, so that the face core bonding performance of the foam sandwich structure prepared by the VARI process is better. In addition, the process can ensure that the resin uniformly permeates the fiber fabric and no dry point is ensured, and is particularly suitable for preparing large-size sandwich components. Based on the above advantages, conventional sandwich panels and reinforced sandwich panels are prepared herein using a VARI process.
Drawings
Fig. 1 is a schematic structural view of a sandwich plate type shield tunnel segment anti-collision energy absorbing device.
Fig. 2 is a schematic structural view of a foam core.
Fig. 3 is a top (bottom) view of the foam core.
Fig. 4 is a schematic structural view of the upper skin.
FIG. 5 is a schematic view of the structure of the lower skin.
Fig. 6 is a graph of acceleration change when a drop hammer strikes the sandwich panel.
Fig. 7 is a graph of acceleration change when a drop hammer strikes a solid structure of concrete.
Detailed Description
The present invention will be further described below.
Example 1
The sandwich plate type shield tunnel segment anti-collision energy absorbing device comprises a foam core layer 1, an upper skin 2 and a lower skin 3 which are arranged on the upper surface and the lower surface of the foam core layer 1, wherein the upper skin and the lower skin are respectively arranged on the upper surface and the lower surface of the foam core layer 1;
the contact surface of the upper skin 2 and the foam core layer 1 is provided with first reinforcing ribs 6, and the upper skin 2 and the first reinforcing ribs 6 are integrally formed; the contact surface of the lower skin 3 and the foam core layer 1 is provided with second reinforcing ribs 7, and the lower skin 3 and the second reinforcing ribs 7 are integrally formed; the upper surface of the foam core layer 1 is provided with a first groove 4 matched with a first reinforcing rib 6 in shape, and the lower surface of the foam core layer 1 is provided with a second groove 5 matched with a second reinforcing rib 7 in shape; the first reinforcing ribs 6 are embedded in the first grooves 4, and the second reinforcing ribs 7 are embedded in the second grooves 5. The section of the first reinforcing rib 6 is in an inverted trapezoid shape, the long side of the first reinforcing rib is embedded in the first groove 4, and the short side of the first reinforcing rib is connected with the upper skin 2; the section of the second reinforcing rib 7 is in an inverted trapezoid shape, the long side of the second reinforcing rib is embedded in the second groove 5, and the short side of the second reinforcing rib is connected with the lower skin 3; the first reinforcing ribs 6 have a larger cross-sectional dimension than the second reinforcing ribs 7. The thickness of the upper skin 2 is greater than the thickness of the lower skin 3. The first reinforcing ribs 6 and the second reinforcing ribs 7 are criss-cross reinforcing ribs; the first reinforcing ribs 6 and the second reinforcing ribs 7 are FRP reinforcing ribs.
The core layer is a polyurethane foam core layer 1; the upper skin 2 and the lower skin 3 are GFRP skin, ultra-high molecular weight polyethylene skin or kevlar skin, respectively and independently.
The preparation method of the sandwich plate type shield tunnel segment anti-collision energy absorbing device comprises the following steps:
(1) Criss-cross shallow grooves are engraved on the upper surface and the lower surface of the foam core layer, the distance between the shallow grooves is 20mm, the width is 2mm, and the depth is 2mm; a plurality of through holes are punched along the thickness direction of the foam core layer, the interval of the through holes is 20mm, and the diameter is 3mm; when the foam sandwich board is prepared by adopting a vacuum auxiliary resin introduction (Vacuum Assisted Resin Infusion, VARI for short) process, on one hand, the shallow grooves and the through holes can ensure that liquid resin flows uniformly and rapidly, so that the resin completely infiltrates the fiber cloth, and the aim of ensuring the quality of a finished product is fulfilled. On the other hand, the grooves increase the bonding area of the upper skin, the lower skin and the core layer, and the resin in the grooves can be used as a mechanical engagement key for surface-core combination after being solidified, so that the purpose of improving the surface-core combination strength is achieved.
(2) Widening grooves on the surface of the foam core layer according to the size of the reinforcing ribs, and arranging strip-shaped fiber fabrics in the grooves to serve as reinforcing phases of the reinforcing ribs;
(3) Coating a release agent on a glass flat plate mould, sequentially laying a lower panel fiber cloth, a foam core layer, an upper panel fiber cloth, a release cloth, a separation film and a flow guide net on the glass flat plate after the release agent is dried to form a film, and then arranging a rubber injection pipe and an exhaust pipe to form a preforming system;
(4) Packaging the preformed system by adopting a vacuum bag film, and bonding the vacuum bag film and a glass mold into a sealing system by using a sealing adhesive tape; connecting the exhaust pipe with a vacuum pump, pumping air in the closed system to vacuum, injecting resin into the closed system through a tee joint of the injection pipe, sucking the resin into a preforming system under the action of negative pressure, infiltrating fiber cloth and filling all gaps;
(5) And (5) after the resin is solidified, cutting to obtain a finished product.
In this example, unidirectional glass fiber cloth produced by Changzhou Kele composite material Co., ltd was used as the reinforcing phase of the upper skin, lower skin and reinforcing rib, the single layer thickness was 0.2mm, and the layering mode of the panel was [90 °/0 ]] n The layering direction of the reinforcing ribs is 0 degrees. The resin materials of the upper and lower skins were prepared from 770V vinyl epoxy resin produced by the company Huachang polymer, university of Huadong, and were formulated with corresponding curing agents and accelerators. The material parameters of the foam, panel and stiffener are shown in table 1.
Table 1 material parameters of the face plate, the reinforcing bars and the foam core
Testing the performance of the sandwich plate type shield tunnel segment anti-collision energy absorbing device: the drop weight tester is adopted for testing, the drop weight diameter is 20mm, the overall mass of the drop weight is 2.5kg, the drop weight height is 0.6m, and the acceleration-time curves of the drop weight when the obtained sandwich panel and the concrete solid structure are impacted are respectively shown in fig. 6 and 7.
As can be seen from the figure, the sandwich-type energy absorbing device has an obvious buffering effect on drop hammer impact. After impact, the appearance of the sandwich panel is not destroyed, and the sandwich panel has better impact resistance. Therefore, the structure has better anti-collision energy-absorbing protection effect.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (2)
1. The utility model provides a sandwich board formula shield tunnel section of jurisdiction anticollision energy-absorbing device which characterized in that: the foam comprises a foam core layer, an upper skin and a lower skin which are arranged on the upper surface and the lower surface of the foam core layer; the contact surface of the upper skin and the foam core layer is provided with a first reinforcing rib, and the contact surface of the lower skin and the foam core layer is provided with a second reinforcing rib; the upper surface of the foam core layer is provided with a first groove matched with the first reinforcing rib in shape, and the lower surface of the foam core layer is provided with a second groove matched with the second reinforcing rib in shape; the first reinforcing ribs are embedded in the first grooves, and the second reinforcing ribs are embedded in the second grooves; the section of the first reinforcing rib is in an inverted trapezoid shape, the long side of the first reinforcing rib is embedded in the first groove, and the short side of the first reinforcing rib is connected with the upper skin; the thickness of the upper skin is larger than that of the lower skin; the section of the second reinforcing rib is in an inverted trapezoid shape, the long side of the second reinforcing rib is embedded in the second groove, and the short side of the second reinforcing rib is connected with the lower skin; the cross section size of the first reinforcing rib is larger than that of the second reinforcing rib; the core layer is a polyurethane foam core layer; the upper skin and the lower skin are respectively and independently GFRP skin, ultra-high molecular weight polyethylene skin or Kevlar skin; the first reinforcing ribs and the second reinforcing ribs are FRP reinforcing ribs;
the upper skin and the first reinforcing ribs are integrally formed; the lower skin and the second reinforcing ribs are integrally formed;
the first reinforcing ribs and the second reinforcing ribs are criss-cross reinforcing ribs;
the unidirectional glass fiber cloth is adopted as the reinforcing phase of the upper skin, the lower skin and the reinforcing ribs, and the single-layer thickness is 0.2mm.
2. The method for preparing the sandwich panel type shield tunnel segment anti-collision energy absorbing device is characterized by comprising the following steps: the method comprises the following steps:
(1) Criss-cross shallow grooves are engraved on the upper surface and the lower surface of the foam core layer, the distance between the shallow grooves is 20mm, the width is 2mm, and the depth is 2mm; a plurality of through holes are punched along the thickness direction of the foam core layer, the interval of the through holes is 20mm, and the diameter is 3mm;
(2) Widening grooves on the surface of the foam core layer according to the size of the reinforcing ribs, and arranging strip-shaped fiber fabrics in the grooves to serve as reinforcing phases of the reinforcing ribs;
(3) Coating a release agent on a glass flat plate mould, sequentially laying a lower panel fiber cloth, a foam core layer, an upper panel fiber cloth, a release cloth, a separation film and a flow guide net on the glass flat plate after the release agent is dried to form a film, and then arranging a rubber injection pipe and an exhaust pipe to form a preforming system;
(4) Packaging the preformed system by adopting a vacuum bag film, and bonding the vacuum bag film and a glass mold into a sealing system by using a sealing adhesive tape; connecting the exhaust pipe with a vacuum pump, pumping air in the closed system to vacuum, injecting resin into the closed system through a tee joint of the injection pipe, sucking the resin into a preforming system under the action of negative pressure, infiltrating fiber cloth and filling all gaps;
(5) And (5) after the resin is solidified, cutting to obtain a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011154962.4A CN114474780B (en) | 2020-10-26 | 2020-10-26 | Sandwich plate type shield tunnel segment anti-collision energy absorbing device and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011154962.4A CN114474780B (en) | 2020-10-26 | 2020-10-26 | Sandwich plate type shield tunnel segment anti-collision energy absorbing device and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114474780A CN114474780A (en) | 2022-05-13 |
| CN114474780B true CN114474780B (en) | 2023-12-12 |
Family
ID=81470721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011154962.4A Active CN114474780B (en) | 2020-10-26 | 2020-10-26 | Sandwich plate type shield tunnel segment anti-collision energy absorbing device and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114474780B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116001321A (en) * | 2022-12-09 | 2023-04-25 | 中电科芜湖钻石飞机制造有限公司 | Composite material foam sandwich element and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916365A (en) * | 2006-09-08 | 2007-02-21 | 武汉理工大学 | Technique for strengthening boundary face of functional gradient material of shield duct piece by using FRP rib |
| CN106626536A (en) * | 2017-01-24 | 2017-05-10 | 中国人民解放军理工大学 | Reinforced composite material foam sandwich cylinder and preparation method thereof |
| CN108054508A (en) * | 2017-11-29 | 2018-05-18 | 中国航空工业集团公司济南特种结构研究所 | A kind of reinforced PMI foam layers radome |
| CN108194098A (en) * | 2018-01-05 | 2018-06-22 | 中铁第四勘察设计院集团有限公司 | A kind of shield tunnel anti-collision energy absorption section of jurisdiction device |
| CN110468788A (en) * | 2019-07-22 | 2019-11-19 | 江苏博泓新材料科技有限公司 | A kind of high strength anti-collision block and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8128775B2 (en) * | 2008-12-30 | 2012-03-06 | Mra Systems, Inc. | Process and apparatus for producing composite structures |
-
2020
- 2020-10-26 CN CN202011154962.4A patent/CN114474780B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916365A (en) * | 2006-09-08 | 2007-02-21 | 武汉理工大学 | Technique for strengthening boundary face of functional gradient material of shield duct piece by using FRP rib |
| CN106626536A (en) * | 2017-01-24 | 2017-05-10 | 中国人民解放军理工大学 | Reinforced composite material foam sandwich cylinder and preparation method thereof |
| CN108054508A (en) * | 2017-11-29 | 2018-05-18 | 中国航空工业集团公司济南特种结构研究所 | A kind of reinforced PMI foam layers radome |
| CN108194098A (en) * | 2018-01-05 | 2018-06-22 | 中铁第四勘察设计院集团有限公司 | A kind of shield tunnel anti-collision energy absorption section of jurisdiction device |
| CN110468788A (en) * | 2019-07-22 | 2019-11-19 | 江苏博泓新材料科技有限公司 | A kind of high strength anti-collision block and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| FC坎贝尔.先进复合材料的制造工艺.上海交通大学出版社,2016,第244页. * |
| 赵中南.钢结构设计标准.机械工业出版社,2020,193. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114474780A (en) | 2022-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101352926B (en) | Vacuum auxiliary molding technique produced by large-sized sandwich composite material | |
| CN103042700B (en) | Integrated forming method and device for segmented blade | |
| CN103072284B (en) | A kind of sandwich structure composite material and manufacture method thereof containing strengthening muscle | |
| CN102767471B (en) | Vertical axis wind power generator blade and manufacturing method thereof | |
| CN114474780B (en) | Sandwich plate type shield tunnel segment anti-collision energy absorbing device and preparation method thereof | |
| CN102930862B (en) | Z-direction enhanced underwater sound absorption sandwich composite material and preparation method for same | |
| CN207647684U (en) | Wind generator set blade building block, blade and wind power generating set | |
| CN110744873A (en) | 3D printing structure composite material sandwich board with negative Poisson ratio effect and processing method | |
| CN102296494A (en) | Reinforced composite material sleeper for track transportation and production process thereof | |
| CN104742382A (en) | Pressure-assisted VARI (vacuum assisted resin infusion) forming device and method | |
| CN111470068A (en) | Grille cover body structure for aircraft and manufacturing method thereof | |
| CN111893812A (en) | Multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder and preparation method thereof | |
| CN104179200B (en) | A kind of underground structure shock absorption system and construction method thereof | |
| CN111560888A (en) | Flexible anti-collision structure of toll station safety island based on honeycomb composite material | |
| CN104647776A (en) | Z-pin reinforced composite material stiffened wall plate structure and forming method thereof | |
| CN114683579A (en) | Carbon fiber product embedded pipe body forming structure and forming method | |
| CN211251558U (en) | 3D printing structure composite material sandwich board with negative Poisson ratio effect | |
| CN105690799A (en) | Preparation method of railway vehicle cowl prepared from carbon fiber reinforced resin matrix composite material | |
| CN203487489U (en) | Energy dissipating structure used for crash-proof guiderail | |
| CN103669204A (en) | Macromolecular elastomer expansion joint | |
| WO2009149608A1 (en) | A high density polyethylene railway sleeper | |
| CN101649589A (en) | Polymer modified new-material railway track sleeper | |
| CN202954305U (en) | Buffering energy-absorbing type anti-collision island head of safety island | |
| CN102604329B (en) | Railcar-use enhanced composite material skirt-board | |
| CN202389390U (en) | Glass fiber reinforced plastic sandwich outer cover at front end of railway vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |