CN110685344A - Prefabricated hollow concrete pipe ring and prefabricating method - Google Patents
Prefabricated hollow concrete pipe ring and prefabricating method Download PDFInfo
- Publication number
- CN110685344A CN110685344A CN201910917357.9A CN201910917357A CN110685344A CN 110685344 A CN110685344 A CN 110685344A CN 201910917357 A CN201910917357 A CN 201910917357A CN 110685344 A CN110685344 A CN 110685344A
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- China
- Prior art keywords
- pipe ring
- fiber
- concrete pipe
- air bag
- steel
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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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
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
- B28B21/60—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
Abstract
The invention relates to a prefabricated hollow concrete pipe ring and a prefabricating method, which are applied to underground engineering constructed by adopting a prefabricated assembly method and comprise a pipe ring framework, an air bag arranged in the pipe ring framework and used for forming a hollow structure and a pipe ring body cast and formed in a layered mode, wherein the pipe ring framework comprises a framework main body consisting of a plurality of annular main ribs and a plurality of stirrups used for binding the framework main body, the air bag is arranged in an annular cavity formed by the framework main body and the stirrups and is fixed on the main ribs through hooks.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a prefabricated hollow concrete pipe ring and a prefabricating method.
Background
Based on the characteristics of good mechanical property and economy of reinforced (fiber) concrete materials, the underground engineering taking the prefabricated assembled pipe ring as a bearing structure is mainly applied to municipal pipelines, underground passages, underground pipe galleries and the like, and the most common pipe ring is the reinforced (fiber) concrete pipe ring. Reinforced concrete pipe ring of steel (fibre) generally is that the entity is whole to water to cause the pipe ring dead weight great, assemble and receive great restriction with pipe ring size, and then cause unit length tunnel pipe ring joint more, not only influence the structure atress, moreover because the seam is numerous, increased the risk of tunnel percolating water among the operation process, consequently the tunnel is assembled and is needed optimization and improvement with reinforced concrete pipe ring of steel (fibre) urgent need. Meanwhile, concrete cracks generated in the pipe ring construction and operation process can reduce the bearing capacity of the pipe ring structure and influence the durability of the pipe ring structure, and the fiber is doped into the concrete structure, so that the crack resistance of the concrete structure can be better improved, and the risk of the generation of the pipe ring structure cracks is reduced. However, the reinforcing steel bar of the tunnel pipe ring structure is large, and the pipe ring is difficult to pour.
Disclosure of Invention
The present invention aims at providing a prefabricated hollow concrete pipe ring and a prefabricating method thereof, which overcome the defects of the prior art.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a prefabricated empty stomach concrete pipe ring, is applied to the underground works who adopts the construction of prefabricated concatenation method, includes pipe ring skeleton, sets up the gasbag and the layering of being used for forming empty stomach structure in the pipe ring skeleton and pour fashioned pipe ring body, pipe ring skeleton include the skeleton main part of constituteing by many annular main muscle and many the stirrup that are used for ligature skeleton main part constitute, the gasbag set up in the annular cavity that skeleton main part and stirrup enclose to fix on main muscle through the couple.
The prefabricated hollow concrete pipe ring is a steel/fiber reinforced concrete pipe ring, a fiber reinforced/fiber reinforced concrete pipe ring or a fiber concrete pipe ring, wherein steel/fiber bars in the steel/fiber reinforced concrete pipe ring and the fiber reinforced/fiber reinforced concrete pipe ring are pipe piece stress steel/fiber bars, and steel/fiber bars in the fiber concrete pipe ring are construction steel/fiber bars for fixing the air bag through a hook.
The air bag accounts for more than 20% of the volume of the pipe ring, and the distance from the outer surface of the air bag to the outer boundary of the pipe ring meets the requirements of pipe piece stress and the thickness of a reinforcing steel bar protection layer.
The outer surface of the air bag is streamline, and the material of the air bag is rubber, PVC composite material, waterproof fabric or metal.
When the air bag does not need to avoid the embedded parts corresponding to the pipe rings, the air bag is of an annular structure, and when the air bag needs to avoid the embedded parts corresponding to the pipe rings, the air bag is of a segmented structure on the same ring.
The cross section of the prefabricated hollow concrete pipe ring is in a circular form, a round corner rectangular form and a rectangular form.
The doped fiber in the concrete formed by pouring the pipe ring body adopts steel fiber and synthetic fiber, the steel fiber is carbon steel fiber, low alloy steel fiber or stainless steel fiber, the synthetic fiber is polyacrylonitrile fiber, polypropylene fiber, polyamide fiber or polyvinyl alcohol fiber, and the pipe piece framework material is reinforcing steel bar or fiber rib.
The pipe ring framework adopts steel bars or fiber bars.
A prefabricating method for prefabricating a hollow concrete pipe ring comprises the following steps:
1) binding a pipe ring framework;
2) placing an uninflated air bag in the process of binding the pipe ring framework;
3) after the air bag is fixed by the accurate positioning hook, the air bag is inflated, so that the bearing capacity and the durability of the pipe ring cannot be influenced by the implantation of the air bag;
4) adopting commercial concrete to perform hollow concrete pipe ring pouring prefabrication;
5) and (5) demolding, curing and prefabricating the hollow concrete pipe ring.
Compared with the prior art, the invention has the following advantages:
the method can reduce the self weight of the pipe ring, increase the size of the prefabricated pipe ring, improve the convenience of pipe ring construction, effectively improve the construction efficiency, save raw materials, save the construction cost, reduce the resource loss, realize green construction and reduce the environmental influence; along with the increase of the load caused by the increase of the excavation section of the underground engineering, the thickness of the pipe ring is continuously increased, so that the research and development of the hollow concrete pipe ring have important theoretical significance and practical value.
Drawings
Fig. 1 is a cross-sectional structural view of a prefabricated open-web concrete pipe ring.
Fig. 2 is a structural view of a reinforced concrete pipe ring of steel (fiber) at a section 1-1 in fig. 1.
Fig. 3 is a structural view of a fiber reinforced (fiber) reinforced concrete pipe ring of the section 1-1 in fig. 1.
Fig. 4 is a structural view of a fiber concrete pipe ring of the section 1-1 in fig. 1.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
The invention provides a prefabricated hollow concrete segment and a prefabricating method, wherein the prefabricated hollow concrete segment can be applied to underground projects constructed by adopting a prefabricating and assembling method, including but not limited to pipe-jacking tunnels, underground pipe galleries and the like.
The structure of the prefabricated hollow concrete pipe ring is shown in figures 1-4 and comprises a pipe ring framework, an air bag arranged in the pipe ring framework and used for forming a hollow structure and a pipe ring body formed by layered pouring, wherein the pipe ring framework comprises a framework main body consisting of a plurality of annular main reinforcements and a plurality of stirrups used for binding the framework main body, and the air bag is arranged in a cavity formed by the framework main body and the stirrups and fixed on the main reinforcements through hooks.
The material of the prefabricated hollow concrete pipe ring can be steel (fiber) reinforced concrete, fiber steel (fiber) reinforced concrete or fiber concrete; the reinforced concrete pipe ring adopts a classic steel (fiber) bar and concrete mechanics calculation mode; the fiber reinforced concrete pipe ring considers that the fiber and the steel (fiber) bar are stressed together, the amount of the steel (fiber) bar configured on the pipe ring can be effectively reduced, and the fiber reinforced concrete pipe ring completely adopts the fiber to replace the steel (fiber) bar.
The distance from the outer surface of the air bag to the outer boundary of the corresponding pipe ring meets the requirements of pipe ring stress and the thickness of a steel bar protection layer, the thickness of the protection layer of the pipe ring steel bar is ensured by positioning the air bag, the durability of the pipe ring structure is not influenced, the volume of the air bag accounts for more than 20% of the volume of the pipe ring, the consumption of concrete is effectively reduced, and the quality is reduced.
The shape of the air bag needs to consider the internal structure characteristics of the pipe ring, embedded parts corresponding to the pipe ring need to be avoided, and the complete air bag ring or the air bag with the same ring can be placed in a segmented mode according to needs.
In addition, the appearance and the positioning of the air bag are required to ensure that the bearing capacity of the pipe ring is not obviously influenced, the streamline form which is convenient for concrete pouring is adopted, and the built-in air bag increases the heat dissipation area of the concrete and reduces the volume of the concrete, so that the pipe ring cracks possibly caused by the hydration heat of the large-volume concrete are reduced.
The hook for positioning the air bag has enough strength and toughness, so that the air bag cannot deviate in the concrete pouring process.
The air bag material can be rubber, PVC composite material, waterproof fabric, metal or other high polymer materials and the like, has pressure resistance and puncture resistance, avoids rupture and failure in the installation, positioning and concrete pouring processes of the air bag, and has no adverse effect on the environment in the tunnel operation process.
Because the gasbag can show and alleviate the average density of pipe ring, the pipe ring size can combine the construction ability of present tunnel construction machinery equipment to increase, reduces unit length pipe ring quantity, reduces unit length tunnel pipe ring seam number, reduces tunnel seam water leakage risk.
In this example, the cross-sectional shape of the prefabricated hollow concrete segment can be in the form of a circle, a rounded rectangle, a quasi-rectangle and the like according to the stress characteristics and the space utilization condition.
The fiber is doped into the concrete poured by the prefabricated hollow concrete segment, the fiber can adopt common non-toxic fiber in fiber concrete such as steel fiber (including carbon steel fiber, low alloy steel fiber, stainless steel fiber and the like) and synthetic fiber (including polyacrylonitrile fiber, polypropylene fiber, polyamide fiber, polyvinyl alcohol fiber and the like), the fiber doping amount in the concrete needs to consider the stress requirement besides the control requirement of pipe ring concrete crack, the reinforcement amount of a steel (fiber) rib framework is correspondingly reduced, and the steel (fiber) rib binding is convenient.
The pipe ring framework can be made of materials meeting the stress requirements, such as reinforcing steel bars, fiber ribs and the like.
The design method of the prefabricated hollow concrete pipe ring can be realized by the following steps:
(1) binding a pipe ring steel (fiber) rib framework;
(2) the air bag is arranged in the process of binding the pipe ring steel (fiber) rib framework;
(3) the air bag hook is accurately positioned, so that the bearing capacity and the durability of the pipe ring cannot be influenced by the implantation of the air bag;
(4) adopting commercial concrete to perform hollow steel (fiber) reinforced concrete pipe ring prefabrication;
(5) and demolding and curing the prefabricated hollow reinforced steel (fiber) concrete pipe ring.
Claims (9)
1. The utility model provides a prefabricated hollow concrete pipe ring, is applied to the underground works who adopts the construction of prefabricated concatenation method, a serial communication port, including pipe ring skeleton, setting in the pipe ring skeleton be used for forming the gasbag of empty stomach structure and the fashioned pipe ring body is pour in layering, the pipe ring skeleton include the skeleton main part of constituteing by many annular main muscle and many the stirrup that are used for ligature skeleton main part constitute, the gasbag setting in the annular cavity that skeleton main part and stirrup enclose to fix on main muscle through the couple.
2. The prefabricated open-web concrete pipe ring as claimed in claim 1, wherein the prefabricated open-web concrete pipe ring is a reinforced/fiber reinforced concrete pipe ring, a fiber reinforced/fiber reinforced concrete pipe ring or a fiber concrete pipe ring, wherein the steel/fiber bars in the reinforced/fiber reinforced concrete pipe ring and the fiber reinforced/fiber reinforced concrete pipe ring are segment stress steel/fiber bars, and the steel/fiber bars in the fiber reinforced concrete pipe ring are construction steel/fiber bars for fixing the air bags by the hooks.
3. The prefabricated open-web concrete pipe ring according to claim 1, wherein the air bag occupies more than 20% of the volume of the pipe ring, and the distance from the outer surface of the air bag to the outer boundary of the pipe ring meets the requirements of pipe piece stress and the thickness of a steel bar protection layer.
4. The prefabricated open-web concrete pipe ring according to claim 1, wherein the outer surface of the air bag is streamlined and made of rubber, PVC composite, water-impermeable fabric or metal.
5. The prefabricated open-web concrete pipe ring as claimed in claim 1, wherein the air bag is of an annular structure when the air bag does not need to avoid the embedded part corresponding to the pipe ring, and is of a segmented structure on the same ring when the air bag needs to avoid the embedded part corresponding to the pipe ring.
6. The prefabricated open web concrete pipe ring according to claim 1, wherein the cross-sectional shape of the prefabricated open web concrete pipe ring is in the form of a circle, a rounded rectangle or a rectangle.
7. The prefabricated open-web concrete pipe ring according to claim 1, wherein the doped fiber in the concrete formed by pouring the pipe ring body is steel fiber and synthetic fiber, the steel fiber is carbon steel fiber, low alloy steel fiber or stainless steel fiber, the synthetic fiber is polyacrylonitrile fiber, polypropylene fiber, polyamide fiber or polyvinyl alcohol fiber, and the pipe piece framework material is steel bar or fiber rib.
8. The prefabricated open-web concrete pipe ring as claimed in claim 1, wherein the pipe ring frame is made of steel bars or fiber bars.
9. A prefabrication method for prefabricating a hollow concrete pipe ring is characterized by comprising the following steps:
1) binding a pipe ring framework;
2) placing an uninflated air bag in the process of binding the pipe ring framework;
3) after the air bag is fixed by the accurate positioning hook, the air bag is inflated, so that the bearing capacity and the durability of the pipe ring cannot be influenced by the implantation of the air bag;
4) adopting commercial concrete to perform hollow concrete pipe ring pouring prefabrication;
5) and (5) demolding, curing and prefabricating the hollow concrete pipe ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910917357.9A CN110685344A (en) | 2019-09-26 | 2019-09-26 | Prefabricated hollow concrete pipe ring and prefabricating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910917357.9A CN110685344A (en) | 2019-09-26 | 2019-09-26 | Prefabricated hollow concrete pipe ring and prefabricating method |
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| CN110685344A true CN110685344A (en) | 2020-01-14 |
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| CN201910917357.9A Pending CN110685344A (en) | 2019-09-26 | 2019-09-26 | Prefabricated hollow concrete pipe ring and prefabricating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309243A (en) * | 2021-07-12 | 2021-08-27 | 中煤第三建设（集团）有限责任公司 | Mounting method and mounting structure for external wall of prefabricated building |
Citations (5)
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|---|---|---|---|---|
| CN102561682A (en) * | 2012-02-16 | 2012-07-11 | 华南理工大学 | High-strength inflatable air sac for cast-in-place concrete hollow floor and production method for high-strength inflatable air sac |
| CN202689327U (en) * | 2012-07-26 | 2013-01-23 | 黑龙江宇辉新型建筑材料有限公司 | Partition board with built-in light filler or built-in empty holes |
| CN203891312U (en) * | 2014-04-04 | 2014-10-22 | 北京城建设计发展集团股份有限公司 | Prefabricated closed-cavity hollow component of underground structure |
| WO2017081990A1 (en) * | 2015-11-11 | 2017-05-18 | 鹿島建設株式会社 | Precast structure, and construction method for underground structures |
| CN108119166A (en) * | 2017-12-15 | 2018-06-05 | 西南交通大学 | Across the large-scale activity fracture belt tunnel prefbricated tunnel lining structure in meizoseismal area and tunnel |
-
2019
- 2019-09-26 CN CN201910917357.9A patent/CN110685344A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561682A (en) * | 2012-02-16 | 2012-07-11 | 华南理工大学 | High-strength inflatable air sac for cast-in-place concrete hollow floor and production method for high-strength inflatable air sac |
| CN202689327U (en) * | 2012-07-26 | 2013-01-23 | 黑龙江宇辉新型建筑材料有限公司 | Partition board with built-in light filler or built-in empty holes |
| CN203891312U (en) * | 2014-04-04 | 2014-10-22 | 北京城建设计发展集团股份有限公司 | Prefabricated closed-cavity hollow component of underground structure |
| WO2017081990A1 (en) * | 2015-11-11 | 2017-05-18 | 鹿島建設株式会社 | Precast structure, and construction method for underground structures |
| CN108119166A (en) * | 2017-12-15 | 2018-06-05 | 西南交通大学 | Across the large-scale activity fracture belt tunnel prefbricated tunnel lining structure in meizoseismal area and tunnel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309243A (en) * | 2021-07-12 | 2021-08-27 | 中煤第三建设（集团）有限责任公司 | Mounting method and mounting structure for external wall of prefabricated building |
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Application publication date: 20200114 |
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