CN101067302A - Steelwire net reinforced cement manhole cover and water grid cover and producing method thereof - Google Patents
Steelwire net reinforced cement manhole cover and water grid cover and producing method thereof Download PDFInfo
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- CN101067302A CN101067302A CN 200710123467 CN200710123467A CN101067302A CN 101067302 A CN101067302 A CN 101067302A CN 200710123467 CN200710123467 CN 200710123467 CN 200710123467 A CN200710123467 A CN 200710123467A CN 101067302 A CN101067302 A CN 101067302A
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- wire cloth
- gauze wire
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- well lid
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Abstract
The present invention is wire net reinforced concrete manhole cover and sewer cover and their making process. Each of the wire net reinforced concrete manhole cover and sewer cover includes one cover plate and one frame, and features that the cover plate is made of concrete with embedded wire net of 0.2-5.0 mm diameter and 5x5 cm density and the wire net has bent edge to form annular reinforcing body. The making process of the cover has the formed wire net poured inside concrete. The cover with high density wire net of small wires has raised bearing capacity, high crack resistance, high impact resistance and long service life.
Description
Technical field
The invention belongs to the design and fabrication technology field of water drain grid cover and manhole cover, be specifically related to a kind of gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover of building the gauze wire cloth that finer wire forms that bury, with and preparation method thereof.
Background technology
The steel fibrous concrete manhole cover is as the protector of manhole, not only be applied to green belt and sidewalk etc. in China, also be widely used in arterial street, motor-driven vehicle going, park the place, even the extraordinary road and the places such as speedway of airport or the landing of confession helicopter.Supporting capacity to the steel fibrous concrete well lid of different brackets requires each variant, and the cracking load of well lid requires from 10kN to 180kN, and failure load requires not wait from 20kN to 360kN.Whatever rank of other well lid, manufacturer is for over burdening situation that prevents to occur and the steel fibrous concrete manhole cover JC 889-2001 standard that meets national regulation, the HRB335 hot rolled ribbed steel bar of appointment in all employing standards, the diameter of reinforcing bar is all greater than 5mm, even reaches 16-20mm.In order to save cost, reinforcing bar generally adopts lengths of rebar to add in the concrete in a jumble or intersect to place and builds in concrete, perhaps forms greater than netted the burying of 10cm * 10cm and builds in concrete simultaneously.And, higher standard has been proposed also the performance as the steel fibrous concrete water drain grid cover of city municipal engineering drainage vitals along with the continuous development of urban construction, require its supporting capacity and intensity to adapt to the needs of heavy day by day urban traffic.
All steel fibrous concrete producers and these those skilled in the art all think at present, for strengthening the supporting capacity and the intensity of steel fibrous concrete water drain grid cover and well lid, have only by the consumption, the diameter of reinforcing bar and the thickness of cover plate that increase steel fibre and realize, this is to be cost with the manufacturing cost that increases product and weight.The weight of corresponding high-grade steel fibrous concrete well lid increases, cost increases substantially, and this has also limited the large-scale promotion of A, B grade steel fibrous concrete well lid.The manufacturer that has also effectively reduces cost and weight for the quality that improves steel fibrous concrete water drain grid cover and well lid, having adopted the 16mm Ribbed Bar to knot builds, adopt the above high performance concrete of C50, C60 then, but owing to adopted than mixing a large amount of additives in the reinforcing bar of major diameter specification and the concrete, its cost reduces very little, though the intensity of cover plate increases substantially, toughness reduces accordingly.
The inventor finds through big quantity research and experiment why water drain grid cover and well lid break easily, is not because the concrete cover bulk strength is not enough, and reduces just because of cover plate toughness that it is inhomogeneous that stress disperses, and causes the cover plate shock resistance to reduce.Simultaneously because the lid surface layer only is the sandstone cement structures, when in use being subjected to the rolling fast of big load machine motor vehicle, the surface damaged pit occurs because of the bump of strong impact force easily, can't in time disperse stressed when causing this place stressed once more, cause the crack of running through whole, the application life of well lid and water drain grid cover and security performance are reduced greatly.
In addition, though edge sealing is wrapped up with stirrup or iron hoop in the limit of existing steel fibrous concrete manhole cover and angle, be on the one hand because the easiest external impact force that is subjected in corner, on the other hand, its limit and angular position only are cement sandstone and in disorder steel fibre mixture, there is not the enhancing of gauze wire cloth and to stressed dispersion, it also is the position of easy breakage, but since stirrup and iron hoop can not with the good combination of concrete, the expansion coefficient difference of the two is bigger, in addition stirrup and iron hoop can not opposite side and the stress that is subjected to of angular position effectively protect, in actual use, the limit and the angle of manhole cover are still the weakest position, damage easily, stirrup or iron hoop are fair often, and its inner edge, the concrete at angle is cracked or come off.
Summary of the invention
The object of the present invention is to provide to have and improve than high bearing capacity, toughness height, surperficial impact strength, thus the gauze wire cloth enhancement mode concrete inspection well that has prolonged application life lid and water drain grid cover, and effectively reduce production costs.
Another object of the present invention is to provide the preparation method of a kind of gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover, it not only can effectively improve the surperficial anti-clashing and breaking ability of cover plate, also is convenient to large-scale industrialization production.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover, comprise cover plate and seat frame, it is characterized in that described cover plate is buried to build in concrete by gauze wire cloth constitutes, and described gauze wire cloth is knotted by the finer wire of diameter 0.2～5.0mm and formed, and the density of knotting of gauze wire cloth is less than 5cm * 5cm.
Described gauze wire cloth is to be parallel to 1～2 layer that the cover plate upper surface is provided with, and buries in the described seat frame and builds the gauze wire cloth that described finer wire is knotted and formed.
Described gauze wire cloth is the one deck that is parallel to cover plate upper surface or lower surface setting, and gauze wire cloth is positioned at apart from the position of cover plate end face 5～15mm.
Be provided with in the concrete of described cover plate the annular reinforcement fin of projection vertically downward is set on reinforcing steel bar skeleton or the cover plate bottom surface.
The area of described gauze wire cloth is equal to or greater than the cover plate face area, and the edge of gauze wire cloth is crooked up or down, forms annular and strengthen body in the lateral edges of cover plate.
The mode of knotting of described gauze wire cloth is that strap-on structure is twined in finer wire interlacing, finer wire welding or finer wire crosspoint, and described gauze wire cloth also can be formed by the steel plate cold stretch.
Described finer wire is common finer wire or cold stretch finer wire, and described gauze wire cloth is formed by steel plate punching press after-drawing.
The preparation method of described gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover comprises and is prepared as follows step: with diameter is that the finer wire of 0.2～5.0mm is formed the gauze wire cloth of density less than 5cm * 5cm, and gauze wire cloth and concrete casting build up cover plate.
It is characterized in that described gauze wire cloth is 1 layer, gauze wire cloth is cast in apart from the cover plate upper surface or the position of lower surface 5～15mm, the edge of gauze wire cloth downwards or be bent downwardly, its sweep is positioned at cover plate inside wall position.
Gauze wire cloth among the preparation method of described gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover is upper and lower two-layer, the edge of upper strata gauze wire cloth is bent downwardly, the edge of lower floor's gauze wire cloth is bent upwards, and sweep is positioned at cover plate inside wall position, forms along the cage shape on cover plate top layer to arrange.
Experiment and test shows that this case inventor process is a large amount of: the employing diameter is that the finer wire of 0.2～5.0mm is formed the gauze wire cloth of density less than 5cm * 5cm of knotting, water then and build up concrete cover, its supporting capacity can satisfy the corresponding standard requirement fully, and its anti-high-strength impact ability obviously is better than the steel fibrous concrete water drain grid cover and the well lid of existing major diameter reinforcing bar preparation simultaneously.Though the tensile strength of single finer wire and rupture strength are significantly less than the major diameter reinforcing bar, but it is when receiving less bending distortion, can carry out stress effectively disperses, and can not produce concentrated stress at bending part as the major diameter reinforcing bar, when finer wire is formed gauze wire cloth, and be cast in when making the steel-wire-net reinforced concrete cover plate in the concrete, the bearing pressure of concrete water drain grid cover and well lid and high-strength impact power are netted by many finer wires and are distributed to rapidly in the whole cover plate, significantly improve its supporting capacity and anti-high-strength impact ability.The inventor finds that also it is because the surface of cover plate because of high-strength impact and collision, occurs after the inhomogeneous small size breakage that causes of stress dispersion, and is not because quiet bearing strength causes inadequately that crackle in use appears in existing water drain grid cover and well lid easily.Because steel fibre is embedding darker, cover plate upper surface concrete is subjected to sticker or impact forces easily and less pit or section occur, when being subjected to greater impact once more, because this locates the discontinuous cover plate that causes of stressed dispersion because of the crack occurring above cracking load.The present invention in time rationally disperses the various stressed of its upper surface by gauze wire cloth being cast in the concrete of cover plate upper surface 5～15mm, has avoided stress to concentrate the damage that a certain position of cover plate is caused.Simultaneously, owing to the limit of manhole cover, the enhancing that gauze wire cloth is located to have in the interior concrete in the angle, the impact strength at its limit, angle improves greatly, can save the stirrup or the iron hoop that are provided with outside existing manhole cover limit, the angle.
Show through experiment, the gauze wire cloth that adopts one deck finer wire to be made into, just can make this gauze wire cloth enhancement mode concrete inspection well lid reach the supporting capacity requirement of B level steel fibrous concrete manhole cover, promptly can be used for motor-driven vehicle going, the urban road of parking, highway and parking lot.Adopt the concrete manhole cover of two-layer gauze wire cloth can meet the supporting capacity requirement of A grade reinforcing steel concrete manhole cover, promptly can be used for the airport maybe can be for the extraordinary road and the place such as speedway of helicopter landing.Its anti-high-strength impact ability then significantly is better than building the well lid of major diameter Ribbed Bar.Even the high density finer wire net that adopts fineness only to have the finer wire of 0.2mm to form strengthens well lid and water drain grid cover, also be far longer than existing steel fibre enhancement mode concrete inspection well lid and water drain grid cover its application life as D level manhole cover.The density of knotting of gauze wire cloth can be adjusted accordingly according to the specification intensity and the application places of used finer wire, with the consumption of reduction finer wire, thereby reduces cost of material.If the edge of gauze wire cloth is completed into cage shape gauze wire cloth up or down, and will go up the sidewall inner edge that curved or downward bent part branch is cast in well lid, can significantly strengthen the impact resistance of well lid corner angle, thereby guaranteeing to improve supporting capacity and impact strength under the whole intact prerequisite of well lid, and can remove the sidewall protection iron hoop that is adopted in the existing well lid, reduce cost of material.The well lid that applied environment is more abominable or when relatively harsher, can build the Ribbed Bar bar that be arranged in parallel with gauze wire cloth in well lid to the requirement condition of well lid further strengthens quiet supporting capacity, increases the service life.
The supporting base of well lid and water drain grid cover also is to have the bearing mechanism identical with well lid and water drain grid cover simultaneously, by building the gauze wire cloth that finer wire is formed on its surface or/and bury inside, can equally with cover plate strengthen its impact strength and application life.
This gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover adopt prefabricated gauze wire cloth in the preparation; can shorten the production process of water drain grid cover and well lid greatly; saved simultaneously and added the operation of protecting iron hoop and the welding sequence of reinforcing bar and iron hoop; be fit to large-scale production; for cooperating the not lid and the seat frame of shape of the same race; can adopt the mode of punching press that gauze wire cloth is struck out the shape that cooperates with lid or seat frame, integral body is put into mould and is carried out concreting, improves operating efficiency.
Beneficial effect of the present invention is, this gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover have been broken through the traditional understanding of the industry for steel fibrous concrete manhole cover and water drain grid cover, by adopting minor diameter, highdensity gauze wire cloth when satisfying the supporting capacity of concrete cover, make the cracking resistance and the shock resistance of cover plate obtain bigger raising, thereby improve the durability of water drain grid cover and well lid, prolong its application life, and saved the consumption of steel, have good technical economic benefit.
Description of drawings
The invention will be further elaborated below in conjunction with drawings and Examples.
Fig. 1 is the cross-sectional view of the embodiment of the invention 1;
Fig. 2 is the cross-sectional view of the embodiment of the invention 2;
Fig. 3 is the cross-sectional view of the embodiment of the invention 3;
Fig. 4 is the part section structural representation of the embodiment of the invention 4;
Fig. 5 is the cross-sectional view of the embodiment of the invention;
Fig. 6 is the cross-sectional view of another specific embodiment of the present invention;
Fig. 7 is the cross-sectional view of seat frame of the present invention;
Fig. 8 is another cross-sectional view of seat frame of the present invention.
The specific embodiment
The edge of gauze wire cloth 2 is bent downwardly about 5cm, and its flexure plane is positioned at the cover sidewall position, forms an annular and strengthen body in the lateral edges of cover plate, has strengthened the impact resistance of side edge thereof corner angle.
The preparation of this gauze wire cloth enhancement mode concrete inspection well lid comprises preparation cover plate and seat frame.Preparation cover plate concrete grammar is as follows: preparation gauze wire cloth 2, adopting the finer wire interlacing mode of knotting is that the common finer wire of 3.0mm is formed the gauze wire cloth 2 that density is 4cm * 4cm with diameter, the area of gauze wire cloth 2 is equal to or greater than the well lid face area, and the edge of gauze wire cloth 2 is bent downwardly about 5cm.It is die needed to prepare the preparation concrete cover, is being positioned at the position of locating to mark laying gauze wire cloth 2 below the cover plate upper surface about 5mm, and this is the optimum position that gauze wire cloth 2 is set.At first, stop feeding, lay gauze wire cloth 2, continue feeding then, fill the after vibration moulding in the position that arrives predetermined laying gauze wire cloth 2 with concrete 1 feeding steel coaming plate.The preparation method of seat frame similarly repeats no more.
Test shows that embodiment 1 described gauze wire cloth enhancement mode concrete inspection well lid is than not adopting the impact resistance of the concrete manhole cover of gauze wire cloth to improve more than 50% in the prior art.Well lid crack load is greater than 150KN, and rupture load is greater than 250KN, and 30 tons of automobiles come and go 50 times and do not damage.
The preparation of this gauze wire cloth enhancement mode concrete inspection well lid comprises preparation cover plate and seat frame.Preparation cover plate concrete grammar is as follows: prepare gauze wire cloth 2 earlier, with diameter is that the cold stretch finer wire of 2.0mm is woven into the gauze wire cloth 2 that density is 2cm * 2cm, the area of gauze wire cloth 2 is equal to or greater than the well lid face area, the edge of first floor gauze wire cloth 2 is bent downwardly about 4cm, and the edge of second layer gauze wire cloth 2 is bent upwards 5cm.It is die needed to prepare the preparation concrete cover, makes a mark in advance in the position of laying two-layer gauze wire cloth 2 respectively.With concrete 1 feeding steel coaming plate, lay gauze wire cloth 2 then at the specified altitude position, continue feeding, when arriving another predetermined paving location, lay another layer gauze wire cloth 2, continue feeding until filling the after vibration moulding.The seat frame adopts the conventional method preparation, repeats no more.
Test shows that embodiment 2 described gauze wire cloth enhancement mode concrete inspection well lids are than not adopting the impact resistance of the concrete manhole cover of gauze wire cloth to improve more than 70% in the prior art.Well lid crack load reaches 200KN, and rupture load can reach the supporting capacity of A level concrete manhole cover greater than 360KN.
Among the above embodiment, the finer wire that gauze wire cloth 2 uses can be common finer wire or cold stretch finer wire, or the finer wire that is formed by steel plate punching press after-drawing.The diameter of finer wire can be 0.2～5.0mm, and the density of knotting of gauze wire cloth 2 is less than 5cm * 5cm.When using diameter, preferably select highdensity gauze wire cloth for use or add reinforcing bar to strengthen, to guarantee the higher intensity of concrete manhole cover less than the finer wire of 3mm.
As Fig. 5,6,7 and shown in Figure 8, this gauze wire cloth also can be arranged in manhole cover near 5～15mm place, lower surface, gauze wire cloth can the plane form be distributed in the lower surface of cover plate, perhaps identical with the following fin reinforcing rib surface profile of manhole cover form is distributed in its whole lower surface.The distribution form of gauze wire cloth in manhole cover is equally applicable to water drain grid cover and seat frame.Gauze wire cloth in the seat frame can be provided with along the edge coated of seat frame radial section, and its coating face can be three or whole four sides.Strengthen the impact resistance and the intensity of whole seat frame end face.Stamping forming mode after this gauze wire cloth can adopt the suction steel wire to knot is made a shape that cooperates with above-mentioned cover plate and seat frame end face, helps the industrialization of manhole cover and water drain grid cover preparation, raising manufacturing efficient.
Claims (10)
1. a gauze wire cloth enhancement mode concrete inspection well covers and water drain grid cover, comprise cover plate and seat frame, it is characterized in that described cover plate is buried to build in concrete by gauze wire cloth constitutes, and described gauze wire cloth is knotted by the finer wire of diameter 0.2～5.0mm and formed, and the density of knotting of gauze wire cloth is less than 5cm * 5cm.
2. gauze wire cloth enhancement mode concrete inspection well lid according to claim 1 and water drain grid cover is characterized in that described gauze wire cloth is to be parallel to 1～2 layer that the cover plate upper surface is provided with, and bury in the described seat frame and build the gauze wire cloth that described finer wire is knotted and formed.
3. gauze wire cloth enhancement mode concrete inspection well lid according to claim 2 and water drain grid cover is characterized in that described gauze wire cloth is the one deck that is parallel to cover plate upper surface or lower surface setting, and gauze wire cloth is positioned at apart from the position of cover plate end face 5～15mm.
4. gauze wire cloth enhancement mode concrete inspection well according to claim 1 lid and water drain grid cover is characterized in that being provided with in the concrete of described cover plate and the annular of projection is set on reinforcing steel bar skeleton or the cover plate bottom surface vertically downward strengthens fin.
5. gauze wire cloth enhancement mode concrete inspection well lid according to claim 1 and water drain grid cover, the area that it is characterized in that described gauze wire cloth is equal to or greater than the cover plate face area, the edge of gauze wire cloth is crooked up or down, forms annular and strengthen body in the lateral edges of cover plate.
6. gauze wire cloth enhancement mode concrete inspection well lid according to claim 1 and water drain grid cover, the mode of knotting that it is characterized in that described gauze wire cloth is that strap-on structure is twined in finer wire interlacing, finer wire welding or finer wire crosspoint, and described gauze wire cloth also can be formed by the steel plate cold stretch.
7. gauze wire cloth enhancement mode concrete inspection well lid according to claim 1 and water drain grid cover is characterized in that described finer wire is common finer wire or cold stretch finer wire, and described gauze wire cloth can be formed by steel plate punching press after-drawing.
8. the preparation method of the described gauze wire cloth enhancement mode of claim 1 concrete inspection well lid and water drain grid cover, it is characterized in that comprising and be prepared as follows step: with diameter is that the finer wire of 0.2～5.0mm is formed the gauze wire cloth of density less than 5cm * 5cm, and gauze wire cloth and concrete casting build up cover plate.
9. the preparation method of described according to Claim 8 gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover, it is characterized in that described gauze wire cloth is 1 layer, gauze wire cloth is cast in apart from the cover plate upper surface or the position of lower surface 5～15mm, the edge of gauze wire cloth downwards or be bent downwardly, its sweep is positioned at cover plate inside wall position.
10. the preparation method of described according to Claim 8 gauze wire cloth enhancement mode concrete inspection well lid and water drain grid cover, it is characterized in that described gauze wire cloth is upper and lower two-layer, the edge of upper strata gauze wire cloth is bent downwardly, the edge of lower floor's gauze wire cloth is bent upwards, sweep is positioned at cover plate inside wall position, forms along the cage shape on cover plate top layer to arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710123467 CN101067302A (en) | 2007-06-26 | 2007-06-26 | Steelwire net reinforced cement manhole cover and water grid cover and producing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710123467 CN101067302A (en) | 2007-06-26 | 2007-06-26 | Steelwire net reinforced cement manhole cover and water grid cover and producing method thereof |
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| Publication Number | Publication Date |
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| CN101067302A true CN101067302A (en) | 2007-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710123467 Pending CN101067302A (en) | 2007-06-26 | 2007-06-26 | Steelwire net reinforced cement manhole cover and water grid cover and producing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343177A (en) * | 2013-07-26 | 2015-02-11 | 德翰智慧科技有限公司 | Subsurface drainage channel |
| CN106003417A (en) * | 2016-07-08 | 2016-10-12 | 国网福建省电力有限公司 | Preparation method for well lid of inspection well for power cable engineering |
| CN110205893A (en) * | 2019-05-10 | 2019-09-06 | 河海大学 | The anti-folding precast concrete pavement structure of upper and lower level laying steel fibre |
-
2007
- 2007-06-26 CN CN 200710123467 patent/CN101067302A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343177A (en) * | 2013-07-26 | 2015-02-11 | 德翰智慧科技有限公司 | Subsurface drainage channel |
| CN104343177B (en) * | 2013-07-26 | 2016-08-31 | 德翰智慧科技有限公司 | Subdrainage passage |
| CN106003417A (en) * | 2016-07-08 | 2016-10-12 | 国网福建省电力有限公司 | Preparation method for well lid of inspection well for power cable engineering |
| CN110205893A (en) * | 2019-05-10 | 2019-09-06 | 河海大学 | The anti-folding precast concrete pavement structure of upper and lower level laying steel fibre |
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