CN216381407U - Tunnel reinforcing structure of composite material pultrusion section bar thin plate - Google Patents
Tunnel reinforcing structure of composite material pultrusion section bar thin plate Download PDFInfo
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- CN216381407U CN216381407U CN202120763364.0U CN202120763364U CN216381407U CN 216381407 U CN216381407 U CN 216381407U CN 202120763364 U CN202120763364 U CN 202120763364U CN 216381407 U CN216381407 U CN 216381407U
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Abstract
The utility model discloses a tunnel reinforcing structure of a composite material pultruded section thin plate, which comprises a thin plate, an end anchor rod and a circumferential anchor rod; the thin plate is a fiber reinforced composite material pultruded section thin plate, and is paved, adhered and fixed on the surface of the tunnel lining in the circumferential direction of the tunnel lining through an adhesive layer; the sheet is anchored on the surface of the tunnel lining by end anchors distributed at both ends of the sheet in the circumferential direction of the tunnel lining and by circumferential anchors distributed between the end anchors at both ends of the sheet in the circumferential direction of the tunnel lining. The utility model can greatly improve the safety, durability and bearing capacity of the tunnel structure, and has low cost and high construction speed.
Description
Technical Field
The utility model relates to the technical field of civil engineering tunnel reinforcement, in particular to a tunnel reinforcing structure of a composite material pultruded section thin plate.
Background
The geological structure of the tunnel penetrating the stratum is usually complex, and the stability difference is large. The tunnel that live time is longer can produce lining cutting degradation and fracture scheduling problem, and then produces secondary problem such as infiltration, causes the potential safety hazard to tunnel operation safety, consequently, tunnel of certain service life most need maintain the reinforcement to resume tunnel structure security, durability and service function, satisfy normal operation requirement, ensure simultaneously that the tunnel is decorated beautifully.
The existing reinforcement process comprises surface crack treatment and lining structure reinforcement, wherein the surface crack treatment generally adopts high-strength sealing mortar or epoxy resin and other coatings, and the lining structure reinforcement steel plate reinforcement, carbon fiber cloth bonding reinforcement, fiber concrete spraying and other processes. The process is complex in construction process, and the reinforcing durability of the steel plate cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a tunnel reinforcing structure and construction method of a composite material pultruded section thin plate, which has low cost and high construction efficiency, and can greatly improve the safety, durability and bearing capacity of the tunnel structure.
A tunnel reinforcing structure of a composite pultruded profile sheet according to an embodiment of the first aspect of the present invention comprises:
the thin plate is a fiber reinforced composite material pultruded section thin plate, and is fixedly paved on the surface of the tunnel lining in the circumferential direction of the tunnel lining through an adhesive layer;
tip stock and circumference stock, the tip stock with the circumference stock will the sheet metal anchor is in tunnel liner is on the surface, wherein, the tip stock is in tunnel liner distributes in the circumference sheet metal both ends department, the circumference stock is in tunnel liner distributes in the circumference sheet metal both ends department between the tip stock.
According to the tunnel reinforcing structure of the composite material pultruded profile thin plate, the advantages of light weight, high strength and good durability of the composite material pultruded profile thin plate are fully utilized, the safety, the durability and the bearing capacity of a tunnel structure can be greatly improved, the cost is low, and the construction speed is high.
According to an embodiment of the first aspect of the present invention, the thin plate further comprises an end cable, and both ends of the end cable are respectively fixed on both ends of the thin plate.
According to a further embodiment of the first aspect of the present invention, the end portion cable has two ends spaced below the respective end portion anchor rods.
According to yet a further embodiment of the first aspect of the present invention, the spacing is not less than 200 mm.
According to one embodiment of the first aspect of the utility model, the tunnel liner is pre-drilled with anchor rod holes.
According to an embodiment of the first aspect of the present invention, the sheet is a resin sheet, and the material of the adhesive layer is the same kind of resin material as that of the constituent material of the sheet.
According to an embodiment of the first aspect of the present invention, the sheet is a glass fiber resin sheet, a carbon fiber resin sheet, a basalt fiber resin sheet, or an aramid fiber resin sheet.
According to one embodiment of the first aspect of the utility model, the sheet is a rectangular sheet having a thickness of 4-6mm and a width of 0.5-1.5mm, the length of the sheet being determined in accordance with the tunnel reinforcement length.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention 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 representation of a tunnel reinforcing structure of a composite pultruded profile sheet according to an embodiment of the first aspect of the present invention.
Reference numerals:
Tunnel lining 1 sheet 2 end anchor rod 3 circumferential anchor rod 4 adhesive layer 5 end dragline 6
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The utility model provides a tunnel reinforcing structure of a composite material pultruded section thin plate in a first aspect.
A tunnel reinforcing structure 1000 of composite pultruded profile sheets according to an embodiment of the first aspect of an embodiment of the present invention is described below with reference to fig. 1.
As shown in fig. 1, a tunnel reinforcing structure 1000 of a composite pultruded profile sheet according to an embodiment of the first aspect of the present invention comprises a sheet 2, end anchors 3 and circumferential anchors 4. The thin plate 2 is a fiber reinforced composite material pultruded section thin plate, and the thin plate 2 is fixedly paved on the surface of the tunnel lining 1 in the circumferential direction of the tunnel lining 1 through an adhesive layer 5; the sheet metal 2 is anchored on the surface of the tunnel lining 1 by end anchor rods 3 and circumferential anchor rods 4, wherein the end anchor rods 3 are distributed at both ends of the sheet metal 2 in the circumferential direction of the tunnel lining 1, and the circumferential anchor rods 4 are distributed between the end anchor rods 3 at both ends of the sheet metal 2 in the circumferential direction of the tunnel lining 1.
Specifically, the thin plate 2 is a fiber reinforced composite material pultrusion profile thin plate (composite material pultrusion profile thin plate for short), the composite material pultrusion profile thin plate 2 is a composite material profile product produced by a pultrusion process, and has the advantages of light weight, high strength, corrosion resistance and the like, the pultrusion process can realize continuous forming, is easy to automate, is suitable for large-batch and continuous production, and has high production efficiency, little influence of operation technology and environment on the product quality, high yield and stable product quality; high fiber content, good stress performance and full play of fiber strength. The composite material pultruded section thin plate 2 manufactured by adopting the pultrusion process has high fiber content, stable quality, good unidirectional stress performance, accurate size and lower comprehensive cost, and can be transported in coils, thereby greatly reducing the transportation difficulty.
The thin plate 2 is paved, adhered and fixed on the surface of the tunnel lining 1 in the circumferential direction of the tunnel lining 1 through an adhesive layer 5; that is, the sheet 2 may be adhered to the surface of the tunnel lining 1 by applying an adhesive to the surface of the tunnel lining 1, and before applying the adhesive, the surface of the tunnel lining 1 is required to be clean and free from mud, which is beneficial to firm adhesion.
The thin plate 2 is anchored on the surface of the tunnel lining 1 by the end anchor rods 3 and the circumferential anchor rods 4, wherein the end anchor rods 3 are distributed at two ends of the thin plate 2 in the circumferential direction of the tunnel lining 1, and the circumferential anchor rods 4 are distributed between the end anchor rods 3 at two ends of the thin plate 2 in the circumferential direction of the tunnel lining 1; that is, the thin plate 2 is anchored on the surface of the tunnel lining 1 by the end anchor rods 3 and the circumferential anchor rods 4, so that the thin plate 2 can be more firmly attached to the tunnel lining 1; the end anchors 3 are distributed at both ends (left and right ends as shown in fig. 1) of the sheet 2, and can firmly fix both ends of the sheet 2 at both left and right ends of the tunnel liner 1, and simultaneously, the sheet 2 is bent to be close to the cross-sectional shape of the tunnel liner during construction, so that construction assembly is facilitated; the circumferential anchor rods 4 are spaced apart in the circumferential direction of the tunnel lining 1, for example, are symmetrically distributed between the anchor rods 3 at the left end and the right end at equal intervals, so that the parts between the left end and the right end of the thin plate 2 can be firmly anchored on the surface of the tunnel lining 1, and the thin plate can be completely attached to the surface of the tunnel lining 1.
Generally, the sheet 2 is mainly fixed on the surface of the tunnel lining 1 through the adhesive layer 5, the end anchor rods 3 and the circumferential anchor rods 4, the construction speed is high, the quality is high, and the safety, the durability and the use function of the tunnel structure can be greatly improved.
According to the tunnel reinforcing structure 1000 of the composite material pultruded profile thin plate, the advantages of light weight, high strength and good durability of the composite material pultruded profile thin plate 2 are fully utilized, the safety, the durability and the bearing capacity of the tunnel structure can be greatly improved, the cost is low, and the construction speed is high.
According to an embodiment of the first aspect of the present invention, the thin plate 2 further comprises an end cable 6, and both ends of the end cable 6 are fixed to both ends of the thin plate 2. That is, during construction, the sheet 2 is tensioned by temporarily using the end portion tension cable 6, and a certain moment is applied to both left and right ends of the sheet 2 so that the sheet 2 is previously bent to approximate the sectional shape of the tunnel liner 1, so that the sheet 2 is fitted over the surface of the tunnel liner 1. The end stay 6 is detached after the end anchor 3 and the circumferential anchor 4 are applied.
Preferably, the end stay 6 is fixed to both end portions of the sheet 2.
The end stay cable 6 can be one of a traditional steel cable or a rib material, a carbon fiber cable or a rib material, a glass fiber cable or a rib material, a basalt fiber cable or a rib material, an aramid fiber cable or a rib material and the like, and can be selected according to actual requirements.
According to a further embodiment of the first aspect of the utility model, the end cables 6 are located at both ends, respectively, spaced below the respective end anchor 3. That is, as shown in fig. 1, the end anchor 3 at the left end may be spaced above the left end of the end cable 6, and the end anchor 3 at the right end may be spaced above the right end of the end cable 6, so that, during construction, a certain moment is applied to both ends of the sheet 2 by the end anchor 3, so that both ends of the sheet 2 are firmly anchored on the surface of the tunnel liner 1, and simultaneously, the sheet 2 is bent to be close to the sectional shape of the tunnel liner 1, so that the sheet 2 is laid on the surface of the tunnel liner 1.
According to a further embodiment of the first aspect of the present invention, the pitch is not less than 200 mm. That is, as shown in fig. 1, the distance between the end anchor 3 at the left end and the left end of the end cable 6 is not less than 200mm, and the distance between the end anchor 3 at the right end and the right end of the end cable 6 is not less than 200 mm. Since there is stress concentration at the force receiving position of the end anchor 3 and the force receiving position of the end cable 6 and there is a weakening influence on the tunnel reinforcement structure 1000, it is necessary to set the interval not less than 200 mm.
According to one embodiment of the first aspect of the utility model, the tunnel lining 1 is pre-drilled with anchor holes, which facilitates the installation of the end anchors 3 and the circumferential anchors 4.
According to one embodiment of the first aspect of the utility model, the material of the adhesive layer 5 is of the same kind as the resin material in the sheet 2 to ensure good adhesion at the interface.
According to one embodiment of the first aspect of the present invention, the sheet 2 is a glass fiber resin sheet, a carbon fiber resin sheet, a basalt fiber resin sheet, or an aramid fiber resin sheet. Specifically, the fibers in the sheet 2 may be glass fibers, carbon fibers, basalt fibers, and aramid fibers, and the resin may be epoxy resin, vinyl resin, polyester resin, unsaturated resin, or the like.
According to an embodiment of the first aspect of the present invention, the thin plate 2 is a rectangular plate, the thickness of the thin plate 2 is 4-6mm, the width of the thin plate 2 is 0.5-1.5mm, and the length of the thin plate 2 is determined according to the tunnel reinforcing length, which can meet the requirements of the tunnel reinforcing structure 1000.
According to one embodiment of the first aspect of the utility model, the width and length of the sheet 2 are determined in accordance with the geometry and length of the cross-section of the tunnel lining 1;
the thickness of the sheet 2 is obtained as follows:
the maximum edge strain epsilon generated by the pre-bending of the thin plate 2 when the design thickness of the thin plate 2 is d is calculated by formula (1), wherein the formula (1) is:
ρ in the formula (1) is the minimum radius of curvature of the cross section of the tunnel lining 1;
the design thickness d is adjusted so that the maximum edge strain epsilon is less than 1/5 of the ultimate tensile strain, thereby determining the thickness of the sheet 2.
Thereby, a suitably sized sheet 2 can be selected, which is advantageous in securing the strength of the tunnel reinforcement structure 1000.
According to a further embodiment of the first aspect of the utility model, the number of circumferential bolts 4 is determined as follows: the end moment to be applied by the sheet 2 is calculated from the geometry of the cross section of the tunnel lining 1, and then the number of circumferential anchor rods 4 is determined.
The tunnel lining 1 takes a circular cross section as an example, the curvature radius of the tunnel lining is rho, the thin plate 2 can be changed into an arc shape only by applying torque to two ends of the thin plate 2, the required applied torque is calculated according to the formula (2), and the formula (2) is as follows:
in equation (2), EI is the cross-sectional bending stiffness of the sheet 2, where E is the elastic modulus of the pultruded sheet 2 and I is the cross-sectional moment of inertia of the pultruded ribbon.
Other cross section shapes such as a parabola and a high-order polynomial curve can be calculated according to a material mechanics method, the end stay cable 6, the end anchor rod 3 and the circumferential anchor rod 4 are used as concentrated loads in the calculation, the thin plate 2 is approximately and completely attached to the tunnel lining 1 by increasing the number of the concentrated loads, and therefore the number of the circumferential anchor rods 4 is determined.
From this, can guarantee that sheet metal 2 and tunnel lining 1 are close complete laminating, and can guarantee the intensity of tunnel reinforced structure 1000.
The second aspect of the present invention provides a method for constructing a tunnel reinforcing structure 1000 of a composite material pultruded section thin plate.
According to the construction method of the tunnel reinforcing structure 1000 of the composite material pultruded profile thin plate according to the embodiment of the second aspect of the present invention, the tunnel reinforcing structure 1000 is the tunnel reinforcing structure 1000 of the composite material pultruded profile thin plate according to any one of the embodiments of the first aspect of the present invention, the construction method comprises the following steps:
cutting a thin plate 2 with a designed length, and applying a moment to the thin plate 2 to pre-bend the thin plate 2;
tensioning the end stay 6 to temporarily fix two ends of the end stay 6 at two ends of the thin plate 2;
and (3) smearing the adhesive on the surface of the tunnel lining 1 to ensure that the thin plate 2 is attached to the tunnel lining 1, then fixing the end anchor rods 3 at two ends, then fixing the circumferential anchor rods 4 at the top, and sequentially and symmetrically fixing the rest circumferential anchor rods 4.
According to the construction method of the tunnel reinforcing structure of the composite material pultruded profile thin plate, disclosed by the embodiment of the second aspect of the utility model, the advantages of light weight, high strength and good durability of the composite material pultruded profile thin plate are fully utilized, the safety, the durability and the bearing capacity of the tunnel structure can be greatly improved, the cost is low, and the construction speed is high.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 utility model. 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 utility model 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 utility model, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A tunnel reinforcement structure of a composite material pultruded profile sheet, comprising:
the thin plate is a fiber reinforced composite material pultruded section thin plate, and is fixedly paved on the surface of the tunnel lining in the circumferential direction of the tunnel lining through an adhesive layer;
tip stock and circumference stock, the tip stock with the circumference stock will the sheet metal anchor is in tunnel liner is on the surface, wherein, the tip stock is in tunnel liner distributes in the circumference sheet metal both ends department, the circumference stock is in tunnel liner distributes in the circumference sheet metal both ends department between the tip stock.
2. The composite pultruded profile sheet tunnel reinforcement structure according to claim 1, further comprising end guy wires, both ends of which are respectively fixed to both ends of said sheet.
3. The composite pultruded profile sheet tunnel reinforcement structure according to claim 2, wherein said end guy wires are positioned at a distance from each other below the corresponding end anchor rods.
4. The composite pultruded profile sheet tunnel reinforcement structure according to claim 3, wherein said pitch is not less than 200 mm.
5. The composite pultruded profile sheet tunnel reinforcement structure according to claim 1, wherein said tunnel liner is pre-drilled with anchor rod holes.
6. The composite pultruded profile sheet tunnel reinforcement structure according to claim 1, wherein said sheet is a resin sheet, and the material of said adhesive layer is the same type of resin material as the resin material of the constituent material of said sheet.
7. The composite pultruded profile sheet tunnel reinforcement structure according to claim 1, wherein said sheet is a glass fiber resin sheet, a carbon fiber resin sheet, a basalt fiber resin sheet, or an aramid fiber resin sheet.
8. The composite pultruded profile sheet tunnel reinforcement structure according to claim 1, wherein said sheet is a rectangular sheet having a thickness of 4-6mm and a width of 0.5-1.5mm, and the length of said sheet is determined according to the tunnel reinforcement length.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120763364.0U CN216381407U (en) | 2021-04-14 | 2021-04-14 | Tunnel reinforcing structure of composite material pultrusion section bar thin plate |
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| CN202120763364.0U CN216381407U (en) | 2021-04-14 | 2021-04-14 | Tunnel reinforcing structure of composite material pultrusion section bar thin plate |
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| CN216381407U true CN216381407U (en) | 2022-04-26 |
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