CN221096554U - Novel prefabricated tunnel inverted arch and lining embedded bar connecting joint - Google Patents
Novel prefabricated tunnel inverted arch and lining embedded bar connecting joint Download PDFInfo
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- CN221096554U CN221096554U CN202323315592.XU CN202323315592U CN221096554U CN 221096554 U CN221096554 U CN 221096554U CN 202323315592 U CN202323315592 U CN 202323315592U CN 221096554 U CN221096554 U CN 221096554U
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- inverted arch
- lining
- steel bar
- prefabricated
- rib
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- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims abstract description 30
- 238000011065 in-situ storage Methods 0.000 claims abstract description 23
- 239000004744 fabric Substances 0.000 claims abstract description 22
- 239000012790 adhesive layer Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 239000003292 glue Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract description 15
- 238000010276 construction Methods 0.000 abstract description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 1
- 101150097977 arch-1 gene Proteins 0.000 description 11
- 239000004567 concrete Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Abstract
The utility model discloses a novel prefabricated tunnel inverted arch and lining embedded rib connecting joint in the field of tunnel construction, which comprises a prefabricated inverted arch and a cast-in-situ lining, wherein two sides of the prefabricated inverted arch are respectively provided with a plurality of connecting ribs, one section of each connecting rib is embedded into the prefabricated inverted arch, and the other section is arranged in the cast-in-situ lining; the connecting rib comprises an internal reinforcing steel bar body, an adhesive layer coated on the periphery of the reinforcing steel bar body and CFRP cloth coated on the adhesive layer; the beneficial effects of the utility model are as follows: the prefabricated inverted arch and the lining are connected in a reinforcement planting mode, a layer of CFRP cloth is coated outside the connecting reinforcement, the connecting reinforcement can be protected, the bending resistance of the connecting reinforcement can be improved, and the safety is higher.
Description
Technical Field
The utility model relates to the technical field of tunnel construction, in particular to a novel prefabricated tunnel inverted arch and lining bar planting connection joint.
Background
The inverted arch is a reverse arch structure arranged at the bottom of a tunnel for improving the stress condition of an upper supporting structure, is one of main components of the tunnel structure, and is used for effectively transmitting the stratum pressure at the upper part of the tunnel to the underground through a tunnel side wall structure or effectively resisting the counter force transmitted by the stratum at the lower part of the tunnel. It can be seen that the inverted arch plays a vital role in the stress system of the tunnel. At present, cast-in-situ reinforced concrete is generally adopted as an inverted arch in a tunnel, so that the thickness is large, the construction quality is difficult to guarantee, and the construction period is long. In actual construction, the working face is difficult to clean and dry, more sundries remain, and the construction and maintenance conditions in the tunnel are poor, so that tunnel bottom diseases, such as tunnel bottom slurry and mud, arch rising and the like, often occur in the operation process of the tunnel after the tunnel is built, and the operation safety of the tunnel is seriously affected.
Most of the prior prefabricated inverted arches and tunnel linings are joggled, lining and inverted arches are joggled, are in a full-assembled structure form, and have the following limiting conditions: the joggle joint has poor integrity and high seam waterproof difficulty.
The mode of planting the muscle is usually used for connecting new and old concrete, and current joint reinforcing bar does not establish protective structure, and new and old concrete planting muscle joint interface department is weak easily ftracture, and this just leads to inside joint reinforcing bar to receive environmental corrosion easily, and the durability is variation.
In summary, the applicant proposes a novel prefabricated tunnel inverted arch and lining bar planting connection joint.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a novel prefabricated tunnel inverted arch and lining bar planting connecting joint.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:
A novel prefabricated tunnel inverted arch and lining embedded rib connecting joint comprises a prefabricated inverted arch and a cast-in-situ lining, wherein two sides of the prefabricated inverted arch are respectively provided with a plurality of connecting ribs, one section of each connecting rib is embedded into the prefabricated inverted arch, and the other section of each connecting rib is arranged in the cast-in-situ lining; the connecting rib comprises an internal reinforcing steel bar body, an adhesive layer coated on the periphery of the reinforcing steel bar body and CFRP cloth coated on the adhesive layer.
The prefabricated inverted arch and the cast-in-situ lining are connected in a reinforcement planting mode, compared with the joggle joint, the integrity of the joint is better, the waterproof performance of the joint is better, the CFRP cloth coated on the reinforcement body is protected outside the reinforcement body through the adhesive layer, the CFRP cloth can prevent the reinforcement body from being corroded by the external environment, the bending resistance of the reinforcement body is enhanced, and the safety and the durability of the connecting joint are improved.
Further defined, CFRP filaments are spirally wound outside the CFRP cloth; the CFRP wires are spirally wound outside the CFRP cloth, so that the adhesion between the CFRP cloth and the steel bar body can be further improved, the CFRP wires are wound on the periphery of the connecting ribs to form ribs, the bonding area is increased, and the bonding performance between the connecting ribs and the concrete is improved.
Further limited, the two sides of the prefabricated inverted arch are respectively provided with a plurality of bar planting holes which are matched with the connecting bars in number, bar planting glue is filled in the bar planting holes, and the bar planting holes and the connecting bars are in clearance fit.
Further limiting, each side of the prefabricated inverted arch is provided with eight connecting ribs, the eight connecting ribs are equally divided into two groups of rib groups, the two groups of rib groups are vertically distributed, and the connecting ribs in each group of rib groups are horizontally distributed at equal intervals; eight connecting ribs are arranged in the way, the connecting ribs are divided into two groups of rib groups, the two groups of rib groups are arranged up and down, four connecting ribs of each group of rib groups are horizontally arranged, so that the connecting points are more, the connecting point stress is more uniform, and the safety is higher.
Further limiting, wherein two sides of the prefabricated inverted arch are respectively provided with a bar planting surface, the inclination angle of the bar planting surface is matched with the inclination angle of the bottom end surface of the cast-in-situ lining, and the connecting bars and the bar planting surfaces are vertically implanted into the prefabricated inverted arch; the connecting bar is arranged on the connecting bar mounting surface, the connecting bar is vertically arranged on the connecting bar mounting surface, and the connecting bar mounting surface is implanted into the prefabricated inverted arch structure more reasonably and stably, and is convenient to install.
Further limiting, and carrying out rough treatment on the bar planting surface; the rough treatment of the reinforced surface can improve the bonding performance between the prefabricated inverted arch and the cast-in-situ lining.
The beneficial effects of the utility model are as follows: the prefabricated inverted arch and the cast-in-situ lining are connected in a reinforcement planting mode, and the CFRP cloth is coated outside the connecting reinforcement to protect the connecting reinforcement, so that the bending resistance of the connecting reinforcement can be improved, and the safety is higher and the durability is better.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a perspective view of a prefabricated inverted arch and lining attachment portion;
Fig. 3 is a schematic structural view of the connecting rib.
Wherein the symbols of the components are as follows:
The prefabricated inverted arch 1, the steel bar planting surface 11, the cast-in-situ lining 2, the connecting bars 3, the steel bar body 31, the CFRP cloth 32 and the CFRP wires 33.
Detailed Description
The following description of the embodiments of the present utility model is provided to facilitate understanding of the present utility model by those skilled in the art, but it should be understood that the present utility model is not limited to the scope of the embodiments, and all the utility models which make use of the inventive concept are protected by the spirit and scope of the present utility model as defined and defined in the appended claims to those skilled in the art.
Examples:
As shown in fig. 1-3, a novel prefabricated tunnel inverted arch and lining bar planting connecting joint comprises a prefabricated inverted arch 1 and a cast-in-situ lining 2, wherein eight dry connecting bars 3 are respectively arranged on two sides of the prefabricated inverted arch 1, the eight connecting bars 3 are equally divided into two groups of bar groups, the two groups of bar groups are vertically arranged CFRP cloth 32, and the connecting bars 3 in each group of bar groups are horizontally uniformly arranged CFRP cloth 32 at intervals; one section of each connecting rib 3 is implanted into the prefabricated inverted arch 1, and the other section is anchored in the cast-in-situ lining 2; the connecting rib 3 comprises an inner reinforcing steel bar body 31, an adhesive layer coated on the periphery of the reinforcing steel bar body 31, CFRP cloth 32 coated on the adhesive layer and CFRP wires 33 spirally wound outside the CFRP cloth 32; eight bar planting holes are respectively formed in two sides of the prefabricated inverted arch 1, bar planting glue is filled in the bar planting holes, and the bar planting holes are in clearance fit with the connecting bars 3; the cast-in-situ lining 2 is fixedly connected with the connecting ribs 3 in a cast-in-situ manner; the two sides of the prefabricated inverted arch 1 are respectively provided with a bar planting surface 11, the inclination angle of the bar planting surface 11 is matched with the inclination angle of the end surface of the bottom of the cast-in-situ lining 2, the connecting bars 3 and the bar planting surface 11 are vertically planted in the prefabricated inverted arch 1, and the bar planting surface 11 is subjected to rough treatment.
Compared with joggle joint, the prefabricated inverted arch 1 and the cast-in-situ lining 2 are better in integrity, the joint is better in waterproofness, the CFRP cloth 32 coated on the steel bar body 31 is protected outside the steel bar body 31 through the adhesive layer, the CFRP cloth 32 can prevent the steel bar body 31 from being corroded by the external environment, the bending resistance of the steel bar body 31 is enhanced, and the safety of a connecting joint is improved; the CFRP wires 33 are spirally wound outside the CFRP cloth 32, so that the adhesion between the CFRP cloth 32 and the steel bar body 31 can be further improved, the CFRP wires 33 are wound so that the outer peripheral surface of the connecting rib 3 is ribbed, the bonding area is increased, and the bonding performance between the connecting rib 3 and concrete is improved; eight connecting ribs 3 are arranged in the way, the connecting ribs are divided into two groups of rib groups, the two groups of rib groups are arranged on the CFRP cloth 32 from top to bottom, and four connecting ribs 3 of each group of rib groups are arranged on the CFRP cloth 32 horizontally, so that the connecting points are more, the stress of the connecting points is more uniform, and the safety is higher; the cast-in-situ mode can cope with tunnel construction of various specifications and sizes; the rib planting surface 11 is arranged, and the structure of the connecting rib 3, in which the vertical rib planting surface 11 is planted in the prefabricated inverted arch 1, is more reasonable and stable, and is convenient to install; the rough treatment of the reinforced surface 11 can improve the bonding performance between the prefabricated inverted arch 1 and the cast-in-situ lining 2.
The construction process comprises the following steps:
01. producing a prefabricated inverted arch 1 and presetting a bar planting hole;
02. Pouring the bar planting glue;
03. Putting the connecting ribs 3 into the cast-in-situ lining 2, and presetting the lap joint length of the connecting ribs 3 close to the end of the cast-in-situ lining 2;
04. and binding the lining reinforcement cage, well lapping with the embedded reinforcement, and finally pouring concrete.
Claims (6)
1. The novel prefabricated tunnel inverted arch and lining embedded rib connecting joint is characterized by comprising a prefabricated inverted arch (1) and a cast-in-situ lining (2), wherein a plurality of connecting ribs (3) are respectively arranged on two sides of the prefabricated inverted arch (1), one section of each connecting rib (3) is implanted into the prefabricated inverted arch (1), and the other section of each connecting rib is arranged in the cast-in-situ lining (2);
The connecting rib (3) comprises an inner steel bar body (31), an adhesive layer coated on the periphery of the steel bar body (31) and CFRP cloth (32) coated on the adhesive layer.
2. The novel prefabricated tunnel inverted arch and lining reinforcing bar connecting joint according to claim 1, wherein the CFRP cloth (32) is externally spirally wound with CFRP wires (33).
3. The novel prefabricated tunnel inverted arch and lining steel bar planting connection joint according to claim 2, wherein steel bar planting holes with the number matched with that of the connecting bars (3) are respectively preset on two sides of the prefabricated inverted arch (1), steel bar planting glue is filled in the steel bar planting holes, and the steel bar planting holes are in clearance fit with the connecting bars (3).
4. The novel prefabricated tunnel inverted arch and lining-planting rib connecting joint according to claim 3, wherein eight connecting ribs (3) are arranged on each side of the prefabricated inverted arch (1), the eight connecting ribs (3) are equally divided into two groups of rib groups, the two groups of rib groups are vertically distributed, and the connecting ribs (3) in each rib group are horizontally distributed at uniform intervals.
5. The novel prefabricated tunnel inverted arch and lining steel bar planting connection joint according to claim 1, wherein two sides of the prefabricated inverted arch (1) are respectively provided with a steel bar planting surface (11), the inclination angle of the steel bar planting surface (11) is matched with the inclination angle of the bottom end face of the cast-in-situ lining (2), and the connecting steel bars (3) are vertically planted in the prefabricated inverted arch (1) together with the steel bar planting surfaces (11).
6. The novel prefabricated tunnel inverted arch and lining steel bar planting connection joint according to claim 5, wherein the steel bar planting surface (11) is subjected to rough treatment.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221096554U true CN221096554U (en) | 2024-06-07 |
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