CN2210310Y - Self-stress cement water supply pipe with dia. great than 800 mm - Google Patents

Abstract

The utility model relates to a self-stressing cement water supplying pipe with a diameter of larger than 800 mm, which is made through a secondary material charging of the multilayer wire-mesh steel reinforcement self-stressing mortar and the self-stressing concrete. The utility model is characterized in that a steel reinforcement framework is a multilayer wire-mesh steel reinforcement framework formed by mixing the steel wire meshes with good dispersivity and the cold-drawn steel reinforcement, each steel wire mesh layer is poured through by the self-stressing mortar, and the inner wall of the utility model is made of self-stressing concrete. The utility model can be made into the self-stressing cement water supplying pipe with a diameter of larger than 800 mm, and the standard that the diameter of the self-stressing cement water supplying pipe is 100-800 mm is broken through. The utility model has the advantages that the equipment used for manufacturing water supplying pipes is simple, the quality is reliable, the manufacture cost is low, and the utility model has the practical new technology.

Description

Self-stress cement water supply pipe with dia. great than 800 mm

The utility model belongs to water supply and sewage work reinforced concrete conduit pipe manufacturing technology field.

The reinforced concrete penstock has two big classes at present, and the one, the prestressing force conduit pipe, another kind of is from the stress conduit pipe.Its bore of prestressing force conduit pipe can be done very greatly, but investment is big, apparatus expensive, and complex manufacturing technology, so cost is higher.From the stress conduit pipe, its manufacturing process, equipment is all fairly simple, and cost is also low, but its bore is only limited to 100～800mm, from the existing product-free of stress pressure conduit pipe current standard is not arranged greater than the 800mm bore yet.Its main cause is that it is still low from stress level for self-stressing cement, the prestress value that it is finally set up in tube wall can not show a candle to prestressed pipe, because low from stress level, the steel strength utilization ratio of body is only about 50%, bore increases steel consumption and increases rapidly, and cost sharply raises.From stress is a kind of chemical pre-stressed, is to rely on concrete expansion ability tension reinforcing steel bar, therefore requires the steel high degree of dispersion, comes to be complementary with the concrete of three-dimensional expansion with omnibearing constraint, to the conduit pipe greater than the 800mm bore, is difficult on the technology realize.If adopt some from the higher self-stressing cement of stress level, then technology is wayward even cause booster rate height.

The purpose of this utility model provides that a kind of manufacturing equipment is simple, technology is easy, reliable in quality, the self-stressing cement penstock greater than the 800mm bore that cost is low.

Self-stressing cement penstock greater than the 800mm bore, at first the self-stress value with body designs more than 5MPa, therefore on Framework Of Steel Reinforcement, adopt the steel wire and the reinforcing bar multistory masonry structure of good dispersion, promptly adopting diameter is that to become mesh be the steel wire of 10 * 10～10 * 20mm for the braided steel wire of 0.9～1mm, be rolled into cylindrical shape, add the hoop spiral reinforcement at the cylinder steel wire, wrapped wire stratum reticulare again outside the hoop spiral reinforcement again, arrange steel bar layer again, so form the multilayer wire mesh reinforcement spatial structure skeleton that there is crotch at two, have four layers of steel wire at least, arrange one deck longitudinal steel bar simultaneously, to improve the pipe fracture resistance, the hoop cloth muscle rate of reinforcing bar is 1.5～2.5%; The hoop spiral reinforcement is a cold-drawn bar, and its diameter is 3～4mm, and longitudinal steel bar also is a cold-drawn bar, and its diameter is 5mm, and the steel wire and the reinforcing bar of skeleton are connected and fixed by colligation, separates by reinforcing bar between steel screen layer and the layer.Adopt reliable and stable self-stressing cement,, on tube-making process, adopt to feed intake for twice as the silicate self-stressing cement etc.; Promptly earlier adding water with self-stressing cement and medium sand stirs into from the stress mortar, reinforced with centrifuge method, make from each steel screen layer of stress mortar penetration, for the second time add water and stir into self-stressing concretes with the rubble of self-stressing cement, medium sand and 5～15mm, with the reinforced filling tube wall of centrifuge method, and reach innermost layer steel wire intersection, and so both solved the penetration problem of Composite Steel silk screen, prevent that again the large-diameter pipe inwall from collapsing and cracking.Earlier through steam curing, maintenance gets final product in normal-temperature water again behind the pipe centrifugal forming.Increase again for the pipe bore; working pressure improves (surpassing 0.8MPa) again; then can be outside the tube core of above-mentioned making self-stressing cement penstock again around one deck prestress annular to spiral reinforcement; make protective layer again; become heavy caliber from stress-prestressing force composite high pressure conduit pipe; this conduit pipe outer around prestress annular to spiral reinforcement guarantee high in cracking resistance under the hydraulic pressure; the self stressed pipe core then bear high in impervious under the hydraulic pressure, thereby the impervious and cracking resistance of conduit pipe is improved synchronously.

The utility model has the advantages that conspicuous, at first according to structural design of the present utility model, can make greater than the 800mm bore from the stress pressure conduit pipe, and manufacturing equipment is simple, the uncomplicated easy production of technology, steady quality, and cost is lower.The expansion of self-stressing cement under steel wire and the good constraint of reinforcing bar at first makes inside concrete closely knit, the tension reinforcing steel bar that outwards expands then, so the body impermeability is good, corrosion resistance and good.More can be on the self stressed pipe core again around one deck prestress annular to spiral reinforcement and make protective layer, thereby increase substantially the bearing capacity of penstock.

Description of drawings, accompanying drawing 1 is the wire mesh reinforcement skeleton greater than the self-stressing cement penstock of 800mm bore, 1 is steel wire among the figure, be that braided steel wire with 0.9～1mm diameter becomes net, its mesh is 10 * 10～10 * 20mm, is rolled into cylindrical shape, and the tube of steel wire 1 is around with hoop spiral reinforcement 2, the periphery of hoop spiral reinforcement 2 is wrapped wire net 1 again, so the spacing between steel screen layer and the steel screen layer just equals the diameter of hoop spiral reinforcement 2.Wire mesh reinforcement skeleton greater than the self-stressing cement penstock of 800mm bore has four layers of steel wire at least, and other has one deck longitudinal steel bar 3, and longitudinal steel bar 3 two ends have crotch.

Accompanying drawing 2 is the tube wall partial sectional views greater than the self-stressing cement penstock of 800mm bore, 1 is steel wire among the figure, have four layers at least, the 2nd, the hoop spiral reinforcement, ring wraps in outside the cylindrical shape steel wire, colligation is fixed, the 3rd, longitudinal steel bar replaces the position of one deck hoop spiral reinforcement 2, the 4th, by self-stressing cement, medium sand, stir into from the stress mortar with water, adopt each stratum reticulare of centrifuging process penetration, for the second time by self-stressing cement, medium sand, add water with the rubble of 5～15mm and stir into self-stressing concretes 5, adopt centrifuging process filling pipe inwall equally, and reach innermost layer steel wire interface place.

Embodiment, the working pressure that designs the 1000mm bore according to technical solutions of the utility model is the self-stressing cement penstock of 0.5MPa, steel wire adopts the braided steel wire of 0.95mm diameter to become the net of 10 * 10mm, is rolled into cylinder.Extremely outer between the steel screen layer from internal layer, separated by the cold-drawn bar hoop spiral bar of φ 3, φ 4, φ 4 diameters respectively.Steel wire, totally four layers, totally three layers of hoop spiral bars, other has one deck to adopt the cold-drawn bar of φ 5 diameters is longitudinal steel bar, its hoop percentage of reinforcement is 2%.From the proportioning of stress mortar is the silicate cement of relying on oneself: medium sand: water=1:1.5:0.4, reinforced thickness are 30mm.The proportioning of self-stressing concretes is the silicate self-stressing cement: medium sand: rubble (5～15): water=1:0.8:1.2:0.35, reinforced thickness is 40mm, female end except that internal layer 40mm all the other by from the stress slurry placement, behind the centrifugal forming, carry out steam curing immediately, the demoulding then hangs in water pipe that maintenance forms in the normal-temperature water again.

Claims (4)

1, a kind of self-stressing cement penstock greater than the 800mm bore, be by the wire mesh reinforcement skeleton, from the stress mortar, self-stressing concretes is formed, it is characterized in that diameter is that to become mesh be that the steel wire (1) of 10 * 10～10 * 20mm is rolled into cylindrical shape for the braided steel wire of 0.9～1mm, add hoop spiral reinforcement (2) at cylinder steel wire (1), wrapped wire net (1) again outside hoop spiral reinforcement (2) again, the skeleton of the spatial structure that formation Composite Steel silk screen (1) and reinforcing bar binding are connected and fixed, has the four-layer network layer at least, other has one deck longitudinal steel bar (3), and the hoop cloth muscle rate of reinforcing bar is 1.5～2.5%.

2, a kind of self-stressing cement penstock according to claim 1 greater than the 800mm bore, it is characterized in that, hoop spiral reinforcement (2) is a cold-drawn bar, its diameter is 3～4mm, longitudinal steel bar (3) is a cold-drawn bar, two ends has crotch, and its diameter is 5mm, separates by reinforcing bar between steel wire (1) layer and the layer.

3, a kind of self-stressing cement penstock greater than the 800mm bore according to claim 1 is characterized in that self-stressing cement is the silicate self-stressing cement, at first stirs into from each stratum reticulare of stress mortar (4) penetration with self-stressing cement medium sand and water; For the second time stir into self-stressing concretes (5) with self-stressing cement, medium sand, 5～15mm rubble and water, the filling tube wall is to steel wire of internal layer net (1) intersection.

4, a kind of self-stressing cement penstock according to claim 1 greater than the 800mm bore, it is characterized in that, in the periphery of self-stressing cement penstock, add one deck prestress annular to spiral reinforcement, then become from stress--prestressing force composite high pressure conduit pipe.

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