CN1401466A - Method for making wire net reinforced concrete manhole cover - Google Patents
Method for making wire net reinforced concrete manhole cover Download PDFInfo
- Publication number
- CN1401466A CN1401466A CN 02138259 CN02138259A CN1401466A CN 1401466 A CN1401466 A CN 1401466A CN 02138259 CN02138259 CN 02138259 CN 02138259 A CN02138259 A CN 02138259A CN 1401466 A CN1401466 A CN 1401466A
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- China
- Prior art keywords
- steel
- concrete
- fiber
- feeding
- wire net
- 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.)
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Classifications
-
- 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
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
A steel wire screen reinforced concrete cover for manhole is made through mixing cement, sand, broken stone, water and additive together, pouring in a steel enclosure, spreading a steel wire screen, continuously pouring, vibration, ageing for 12-72 hr, demoulding, and natural curing for 7-28 days. Its advantages are high crack and impact strength, and long service life.
Description
Technical field
The present invention relates to a kind of preparation method of concrete manhole cover.
Background technology
In the prior art, topmost product is the steel fiber reinforced concrete well lid in the concrete manhole cover, the preparation method of steel fiber reinforced concrete well lid is in the steel fiber reinforced concrete feeding steel coaming plate that will prepare and through vibration moulding, park the demoulding after 12 hours to 72 hours, carried out natural curing again 7 to 28 days, the inboard of described steel coaming plate is welded with netted stiffener; Because the rupture strength elastic modelling quantity and the concrete elastic modelling quantity lower, steel fibre of concrete self are bigger, cause the cracking resistance of well lid and shock resistance, fatigue performance relatively poor, after easily causing well lid to lay, under the repeat function of the carload of big frequency, structure produces cracking, thereby reduced its structure bearing capacity, shortened the service life of well lid.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of wire net reinforced concrete manhole cover, the concrete manhole cover of producing with this method has better cracking resistance energy and shock resistance.
Technical scheme of the present invention is: a kind of preparation method of wire net reinforced concrete manhole cover, the common back of stirring such as a kind of fiber or multiple fiber and cement, sand, stone, water, additive is divided in secondary or three the feeding steel coaming plates.Steel wire must be laid on above the fiber concrete after the feeding for the first time, proceed feeding then, fill the after vibration moulding; Also can divide the secondary feeding again, promptly re-lay the layer of steel wire net after the feeding, proceed feeding again, fill the after vibration moulding in the second time.After the mechanical oscillation moulding, need park the demoulding in 12 hours to 72 hours, carry out natural curing again 7 to 28 days.Described inboard at steel coaming plate is welded with the stiffener of constant spacing, and the primary feeding capacity of fiber concrete need guarantee that concrete is higher than the stiffener of setting after vibration; It is characterized in that: described layer of steel wire net or the composite steel silk screen of in the xoncrete structure of well lid, having increased.
The present invention compared with prior art has following advantage:
Wire net reinforced concrete manhole cover not only can improve the cracking resistance of well lid, also can improve the shock resistance of well lid greatly, thereby improves the durability of well lid, increases the service life, and has good technical economic benefit.
The specific embodiment
A kind of preparation method of wire net reinforced concrete manhole cover is divided the common back of stirring such as a kind of fiber or multiple fiber and cement, sand, stone, water, additive in secondary or three the feeding steel coaming plates.After the feeding, steel wire must be laid on above the fiber concrete for the first time, proceed feeding then, fill the after vibration moulding; Also can divide the secondary feeding, promptly re-lay the layer of steel wire net after the feeding, proceed feeding then, fill the after vibration moulding in the second time.After the mechanical oscillation moulding, need park the demoulding in 12 hours to 72 hours, carry out natural curing again 7 to 28 days.Described inboard at steel coaming plate is welded with the stiffener of constant spacing, and the primary feeding capacity of fiber concrete need guarantee that concrete is higher than the stiffener that is arranged in the steel coaming plate after vibration; It is characterized in that: described layer of steel wire net or the composite steel silk screen of in the xoncrete structure of well lid, having increased.
The addition content of described fiber in concrete is:
(1) polypropylene fibre, modified polypropylene fiber, modification abnormity polypropylene fibre etc. are at concrete volume fraction:
0.2‰～5‰；
(2) volume fraction of steel fibre in concrete: 0.5%～5%.
Described fiber is one or more in the following fiber:
(1) steel fibre;
(2) polypropylene fibre;
(3) modified polypropylene fiber;
(4) modification abnormity polypropylene fibre.
Embodiment one: the volume fraction of every cubic meter of concrete modified polypropylene fiber is 0.7 ‰, presses following match ratio (kilogram/cubic meter concrete):
Modified polypropylene fiber: cement: sand: stone: water: MD type high efficiency water reducing agent
1.5: 490: 560: 1200: stirring in 168: 6.5 was mixed with fiber concrete, in about 1/2 modified polypropylene fibre concrete feeding steel coaming plate that will prepare earlier, carry out mechanical oscillation (the concrete amount in vibration back must cover stiffener) simultaneously, again the layer of steel wire net is laid on above the concrete after vibration, and then all feed remaining modified polypropylene fibre concrete in the steel coaming plate, through vibration moulding, natural curing demoulding after a day, be positioned over the finished product stockyard, water every day 1 time, maintenance was dispatched from the factory in 28 days.Test shows that the shock resistance of the well lid of laying steel wire is compared with the shock resistance of not laying the steel-wire-net reinforced concrete well lid and has improved more than 50%.
Embodiment two: the volume fraction of every cubic meter of concrete steel fibre is 1.5%, presses following match ratio (kilogram/cubic meter concrete):
Modified polypropylene fiber: cement: sand: stone: water: MD type high efficiency water reducing agent
118: 490: 560: stirring in 1200: 168: 6.5 was mixed with fiber concrete, in about 1/2 steel fiber reinforced concrete feeding steel coaming plate that will prepare earlier, carry out mechanical oscillation (the concrete amount in vibration back must cover stiffener) simultaneously, again the layer of steel wire net is laid on above the concrete after vibration, and then all feed remaining steel fiber reinforced concrete in the steel coaming plate, through vibration moulding, natural curing demoulding after a day, be positioned over the finished product stockyard, water every day 1 time, maintenance was dispatched from the factory in 28 days.Test shows that the shock resistance of the concrete manhole cover of laying steel wire is compared with the shock resistance of not laying the steel-wire-net reinforced concrete well lid and has improved more than 60%.
Embodiment three: the volume fraction of every cubic meter of concrete modified polypropylene fiber is 0.7 ‰, presses following match ratio (kilogram/cubic meter concrete):
Modified polypropylene fiber: cement: sand: stone: water: MD type high efficiency water reducing agent
1.5: 490: 560: 1200: stirring in 168: 6.5 was mixed with fiber concrete, in about 1/2 modified polypropylene fibre concrete feeding steel coaming plate that will prepare earlier, carry out mechanical oscillation (the concrete amount in vibration back must cover stiffener) simultaneously; Again a room steel wire is laid on above the concrete after vibrating, and then, carries out mechanical oscillation simultaneously in remaining about 1/4 modified polypropylene fibre concrete feeding steel coaming plate; Again a room steel wire is laid on and vibrates above the good concrete, and then,, be positioned over the finished product stockyard simultaneously through vibration moulding, natural curing demoulding after a day with in the remaining modified polypropylene fibre concrete feeding steel coaming plate, water every day 1 time, maintenance was dispatched from the factory in 28 days.Test shows that the shock resistance of the concrete manhole cover of laying steel wire is compared with the shock resistance of not laying the steel-wire-net reinforced concrete well lid and has improved more than 100%.
Embodiment four: the volume fraction of every cubic meter of concrete modified polypropylene fiber is 0.4 ‰, the volume fraction 0.4 ‰ of every cubic meter of concrete nylon fiber and every cubic meter of concrete steel fiber volume ratio are three kinds of fiber composite of 1.0%, press following match ratio (kilogram/cubic meter concrete):
Modification abnormity polypropylene fibre: nylon fiber: steel fibre: cement: sand: stone: water: MD type high efficiency water reducing agent
0.8: 0.8: 78: 500: 580: 1180: 165: 6 stirrings were mixed with fiber concrete, in about 1/2 steel fiber reinforced concrete feeding steel coaming plate that will prepare earlier (concrete amount must cover stiffener), carry out mechanical oscillation simultaneously; Again the layer of steel wire net is laid on and vibrates above the good concrete, and then, carry out mechanical oscillation simultaneously in the remaining 1/4 steel fiber reinforced concrete feeding steel coaming plate; The layer of steel wire net is laid on again and vibrates above the good concrete, and then with in the remaining steel fiber reinforced concrete feeding steel coaming plate, simultaneously through vibration moulding, natural curing demoulding after a day, be positioned over the finished product stockyard, water every day 1 time, maintenance was dispatched from the factory after 28 days.Test shows that the shock resistance of the concrete manhole cover of laying steel wire is compared with the shock resistance of not laying the steel-wire-net reinforced concrete well lid and has improved more than 160%.
Claims (3)
1. the preparation method of a wire net reinforced concrete manhole cover, the common back of stirring such as fiber and cement, sand, stone, water, additive is divided in secondary or three the feeding steel coaming plates, steel wire must be laid on above the fiber concrete after the feeding for the first time, proceed feeding then, fill the after vibration moulding; Also can divide the secondary feeding, promptly re-lay the layer of steel wire net after the feeding, proceed feeding then, need vibration moulding, maintenance after filling in the second time.Described inboard at steel coaming plate is welded with the stiffener of constant spacing; It is characterized in that: described layer of steel wire net or the composite steel silk screen of in the xoncrete structure of well lid, having increased.
2. the preparation method of wire net reinforced concrete manhole cover according to claim 1, it is characterized in that: described steel fibre or the low elastic modulus fiber addition content in concrete is:
The volume fraction of steel fibre in concrete: 0.5%～5%
Low elastic modulus fiber is at the volume of every cubic meter of concrete: 0.5 kilogram～10 kilograms
3. the preparation method of fibre reinforced concrete manhole cover according to claim 1, it is characterized in that: described low elastic modulus fiber is one or more in the following low elastic modulus fiber:
(1) polypropylene fibre;
(2) nylon fiber;
(3) modified polypropylene fiber;
(4) modification abnormity polypropylene fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138259 CN1401466A (en) | 2002-09-09 | 2002-09-09 | Method for making wire net reinforced concrete manhole cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138259 CN1401466A (en) | 2002-09-09 | 2002-09-09 | Method for making wire net reinforced concrete manhole cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1401466A true CN1401466A (en) | 2003-03-12 |
Family
ID=4749373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02138259 Pending CN1401466A (en) | 2002-09-09 | 2002-09-09 | Method for making wire net reinforced concrete manhole cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1401466A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105801034A (en) * | 2016-06-02 | 2016-07-27 | 南京工程学院 | Steel-fiber light-emitting-concrete maintenance well lid and production method thereof |
-
2002
- 2002-09-09 CN CN 02138259 patent/CN1401466A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105801034A (en) * | 2016-06-02 | 2016-07-27 | 南京工程学院 | Steel-fiber light-emitting-concrete maintenance well lid and production method thereof |
| CN105801034B (en) * | 2016-06-02 | 2018-02-23 | 南京工程学院 | A kind of preparation method of the luminous concrete maintenance well lid of steel fibre |
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