CN108546847A - A kind of superhigh intensity major diameter steel wire main cable strand anchoring material and fill anchor method - Google Patents
A kind of superhigh intensity major diameter steel wire main cable strand anchoring material and fill anchor method Download PDFInfo
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- CN108546847A CN108546847A CN201810438786.3A CN201810438786A CN108546847A CN 108546847 A CN108546847 A CN 108546847A CN 201810438786 A CN201810438786 A CN 201810438786A CN 108546847 A CN108546847 A CN 108546847A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/04—Alloys based on zinc with aluminium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
- C22C18/02—Alloys based on zinc with copper as the next major constituent
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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Abstract
The present invention relates to a kind of superhigh intensity major diameter steel wire main cable strand anchoring material and anchor method is filled, anchor compactness is filled and is not up to 95% or more, 3% is improved than traditional hot casting anchor anchorage compactness；Alloy body of casting retraction value is not more than 5mm after anchorage top pressure, and alloy pours into the depth of steel tendon and can reach the 3/4 of anchorage cone segments after body of casting dissection, without shrinkage cavity on the body of casting.Its chemical composition is using zinc-aluminium copper as alloy basis, further add Mg and rare earth element, the anchoring material has good mobility, it fills anchor efficiency and reaches 100%, the bond length for improving steel wire provides advantage to reduce high intensity major diameter steel wire strand anchorage length, reducing anchorage size.
Description
Technical field
The present invention relates to anchor tank material and anchor tank sides that steel wire main cable strand fills anchor more particularly to extra-high strength wire strand
Method.
Background technology
Main cable strand is the main force structure of suspension bridge, and steel wire is the basic force-summing element of main cable strand.If suspension bridge
It is had the advantage that using the major diameter high tensile steel wire main cable strand of 127- ￠ 6mm-2060MPa：1) quantity for reducing strand, subtracts
The space used is anchored less, reduces the scale of anchorage；2) the meter contact area for reducing steel wire and air, improves main push-towing rope itself
Corrosion resistance；3) overall volume of zinc aluminum alloy coating in main push-towing rope or zinc coating and bright steel wire ratio is reduced about
60%, influence of the factors such as allumen and pure zinc creep to main push-towing rope cord clip is reduced, the resistant slide ability of cord clip is improved.But
Major diameter steel wire is since the contact area of strength enhancing and steel wire and cast material is reduced, previous steel tendon bond length (experience
Value) it cannot meet requirements above, so needing the bond length for improving major diameter steel wire and cast material to ensure strand
Anchoring reliability.
Under conditions of main cable strand cable body and anchorage component qualification, the anchoring material and casting process of hot casting anchor determine
The anchorage reliability of hot-cast anchor cable.
(1) hot casting anchor is cast in using hot melt alloy, it is desirable that it is cast in that alloy mechanical performance is good, and casting character is good, it is compacted
Become smaller, strong to the adhesion or adhesive strength of steel wire, fusing point is relatively low.
(2) for the big specification strands of ￠ 6mm-2060MPa, since its anchorage is longer than the anchorage of traditional strand, also need
It wants cast alloys that there is good mobility, to ensure to fill up cast material as far as possible between the steel wire in anchorage, and realizes it
Anchorage reliability.
(3) for superhigh intensity major diameter steel wire strand, since strand intensity increases, corresponding anchorage length also has
Improved, in the case, traditional cast material be pltine (Ingredient is zinc 98%, copper 2%, cast temperature：460 degree To 480 degree.), those are tiny between when being cast in, alloy molten solution does not flow to the lower half portion of steel wire also and penetrates into steel wire
In gap, liquid alloy is just soon frozen into solid, leads to the reduction of effective bond length of steel tendon and alloy, compactness
It does not reach requirement.If the method for being cast in the method increase melt mobility of temperature using alloy molten solution is improved, temperature raising have
It limits and will produce the larger shrinkage hole that is cast in since temperature improves, and excessively high temperature will influence the correlation of high-tensile steel wires
Can, enforcement difficulty is big.
Based on the above present situation, the exploitation for superhigh intensity, major diameter steel wire main cable strand anchoring material is this field
Technical staff's problem to be solved.
Invention content
The object of the present invention is to provide a kind of novel Zinc-based multi-element alloy anchoring hot-cast anchor materials, ensure the strong of cast material
Degree and mobility, make pouring material quickly trickle within the limited time, sufficiently flow into the steel tendon in high intensity strand anchorage
Gap, fully merged with steel tendon, realize superhigh intensity, major diameter steel wire main cable strand reliable anchoring.
Technical solution is used by the present invention solves the above problems：A kind of superhigh intensity major diameter steel wire main cable strand anchor
Gu material fills anchor compactness and is not up to 95% or more, 3% is improved than traditional hot casting anchor anchorage compactness；Anchorage top pressure
Alloy body of casting retraction value is not more than 5mm afterwards, and alloy pours into the depth of steel tendon and can reach the 3/ of anchorage cone segments after body of casting dissection
4, without shrinkage cavity on the body of casting.
Its chemical composition by mass percentage include as following formula in one kind：
One of formula：Al 5.0%~6.0%, Cu 1.2%~1.6%, Mg 0~0.005%, remaining is zinc, is poured
Cast temperature：430 DEG C to 450 DEG C；
The two of formula：Al 2.0%~5.0% (does not include 5.0%), and Cu 1.6%~2.0% (does not include 1.6%),
Mg0.001~0.005%, rare earth element 0.001~0.2%, remaining is zinc, and magnesium elements and rare earth element can be in the above formula
It adds, can also selectively add, cast temperature simultaneously：440 DEG C to 460 DEG C；
The three of formula：Al 0.1~0.5%, Cu 1.8%~2.2%, rare earth element 0.001~0.10%, remaining is
Zinc, cast temperature：445 DEG C to 465 DEG C.
Preferably, in the two of formula, rare earth element and Mg can be added simultaneously, and also selecting property is added.
Preferably, according to anchorage size, in chemical composition can addition element Bi to improve alloy flowability, the addition of Bi
Amount is 0~0.1%, and Bi elements are added in zinc liquid can significantly reduce the surface tension of zinc bath, and the mobility that zinc is bathed is made to obtain
It further increases, but the additive amount of Bi is unsuitable excessively high, it is excessively high other than increasing cost, swelling influence is had in solidification
Compactness, and easily cause the microscopic void of anchoring material, therefore its content is no more than 0.1%, in the mobility of satisfaction
Under the premise of minimize additive amount.
Preferably, the rare earth element is La and Ce, and performance is stablized, and has good compatibility with zinc-base.
Further, the application element is not independent addition, is added with the shape of alloy, raw material be selected from Zn-Cu alloys,
Zn-Al alloy, Mg and rare earth element are according to the flowing implementations of alloy in actual production with Zn-Al10%-Mg- rare earths, Zn-
The formal character addition of Al15%-Mg- rare earths, Zn-Al30%-Mg- rare earth alloy ingots.
Further, above-mentioned Zn-Al alloy can be selected from Zn-Al10%, Zn-Al15%, Zn- according to Al content difference
It is one or more in Al30%.
Further principle explanation is made to the chemical composition of the application below：
Hot casting anchor generally uses zinc-containing alloy.For zinc in non-alloying, it is a kind of softer metal, intensity and hardness
Value is bigger than tin and lead but smaller than aluminium and copper.It needs to add some other alloying elements in zinc to improve its comprehensive performance, such as
The allumen for increasing aluminium element has the features such as fusing point is low, melting energy consumption is few, good fluidity, is very suitable for using modern pressure
Casting technology carries out processing and forming.And rare earth element can significantly refine dendrite, improve the tensile strength and hardness of alloy.It is suitable dilute
Earth elements have the function of fine grain, removal of impurities, can be effectively improved the comprehensive mechanical property of alloy.It is the work of each alloying element below
With.
1) effect of aluminium
Al is the main alloy element of allumen, microstructure, mobility, mechanical property and corrosion resistance with alloy
It is closely related, first, the mobility of alloy can be significantly improved, improve the casting character of alloy, improves the casting filling energy of alloy
Power, second is that can effective crystal grain thinning, generate solution strengthening, the comprehensive mechanical property of alloy is improved, third, alloy can be improved
Tissue, improves the intensity and mechanical property of alloy pig.The mobility of allumen is better, and the shrinkage cavity generated in process of setting is more
It is easy to get to feeding, the probability of the fire check of generation can also reduce, and the tendentiousness that cast(ing) surface forms cold shut reduces, for being caused
Close good casting is most important.Therefore, aluminium element is added in filling anchor cast material, body of casting crystal grain can be refined, improve casting
Body intensity, while the addition of aluminium element increases the mobility of cast alloys, convenient for cast material when being cast in alloy molten solution energy
It flows to the lower half portion of steel wire and is fully infiltrated between steel wire in those tiny gaps, improve anchorage reliability.
2) effect of copper
In zinc-containing alloy, copper is one of the main intensified element in alloy, and effect is mainly manifested in following side
Face：First, solution strengthening；Second is that forming intermetallic compound (CuZn4)：Third, slowing down eutectoid reaction speed.Copper dissolves in rich aluminium
Mutually and in zinc-rich phase, so that alloy is generated solution strengthening, improve the tensile strength and hardness of alloy, the anti-intergranular of alloy also can be improved
Corrosive power and high temperature creep property.But since copper can hinder the eutectoid reaction of allumen, make eutectoid in casting cooling procedure
Transformation is difficult to fully carry out, to which excessive copper can cause the unstable of alloy body of casting size.
3) effect of magnesium
Solubility very little of the magnesium in pure zinc, even if micro magnesium can also play solution strengthening, improve intensity and hardness
Effect.The eutectoid reaction that magnesium can also prevent intercrystalline corrosion, delay allumen simultaneously.The magnesium amount of allumen is very low, excessively high
Magnesium amount low-alloyed plasticity and creep strength can drop instead.For superhigh intensity, major diameter steel wire main cable strand hot-cast
Anchor fills anchor cast material, and the content of magnesium should control below 0.005%.
4) effect of rare earth element
Rare earth element has extremely strong absorption and binding ability at a higher temperature, with hydrogen, nitrogen, and institute is for use as steel and has
The additive of non-ferrous metal alloy can remove the impurity such as hydrogen, helium, purify metal bath, improve the mobile performance of metal melting state；
On the other hand, rare earth is easy to react to form stable oxide and sulfide with O and S, these particles can be used as heterogeneous forming core
Substrate, and the grain growth in process of setting can be inhibited, to play the role of refining alloy tissue.In suspension bridge master
During cable stock main push-towing rope fills anchor, scoops packet etc. and constantly passed in and out in galvanizing zinc, part zinc is inevitably made to be oxidized to oxygen
Change zinc, also inevitably brings impurity into.After rare earth element is added in zinc bath, part rare earth is replaced with zinc oxide quickly
Reaction forms rare earth oxide, is suspended in the surface of zinc liquid, is aoxidized to block the zinc ingress of air on zinc liquid surface, this
Sample just reduces the oxidational losses of zinc, about reduces by 1/4 or so (effect is especially the most prominent with the effect of La and Ce).
Most of all, purified zinc bath viscosity becomes smaller so that go out the zinc liquid flowing velocity between steel tendon after zinc liquid
It becomes faster, zinc liquid quickly trickles in irrigation process, can fill up the steel tendon gap in anchorage as far as possible in finite time, increases
Effective bond lengths of high-tensile steel wires strands reduces and fills anchor porosity, improves anchorage reliability.Based on the above original
A small amount of rare earth is added in the cast alloys of hot casting anchor by cause, can improve the anchorage reliability of strand, and makes cast alloys
Loss amount greatly reduces, and reduces the cost of anchorage cast alloys.However, being obtained since rare earth atom radius ratio zinc atom radius is big
It is more, and its same solubility very little in the plating solution, it is easy aggregation, floats on alloy molten solution surface.For superhigh intensity, major diameter steel wire
Main cable strand fills anchor cast material with hot casting anchor, and content of rare earth should be controlled 0.1% hereinafter, especially controlling below 0.1%.
It is a further object of the present invention to provide the filling anchor methods of superhigh intensity major diameter steel wire main cable strand, including walk as follows
Suddenly (1) will be put into heating furnace according to the alloy pig of formula melting and melt, and form alloy molten solution：According to theoretical calculation by Zn-
Cu2% and Zn-Al10%, Zn-Al15%, Zn-Al30% alloy pig are arranged in pairs or groups according to a certain percentage, are put into heating furnace, heating
Melt and is sufficiently stirred；Mg and rare earth element according to the flowing implementations of alloy in actual production with Zn-Al10%-Mg- rare earths,
The formal character addition of Zn-Al15%-Mg- rare earths, Zn-Al30%-Mg- rare earth alloy ingots；It is measured in melt after stirring
Whether each element meets design requirement, is such as unsatisfactory for, and the fine tuning of alloying component can be carried out by adding relevant alloy pig, directly
Reach related request to melt ingredient；
(2) by anchorage installation to strand, the steel wire in anchorage is formed separately " broom " shape (divergent shape of taper), it can
Part steel wire is carried out heading by selection, and heading diameter is not less than 1.4 times of steel wire diameter, and heading height is not less than steel wire diameter,
It may be selected, using the wire sub-panel that thickness is 1.5mm~3mm, to ensure that strand sub-wire is uniform, exhaust passage is arranged on wire sub-panel, it is ensured that
Gas discharge in casting process, avoids the formation of shrinkage cavity；
(3) it uses heat-resisting material to carry out the leak stopping sealing of anchorage bottom, and preheats and scoop packet, its temperature is made to be not less than alloy
The half of melt temperature；
(4) it is cast in, percussion is carried out to anchorage in being cast in, the gas in alloy molten solution is discharged, is prevented during filling anchor
Gas is introduced, the compactness of alloy is improved；
(5) shrinkage hole will be formed after alloy is cast in, and not only influence intensity but also influenced beautiful, it is therefore necessary to supplementary irrigation is carried out,
Supplementary irrigation opportunity is selected in the state that the alloy in shrinkage hole reaches initial set；
(6) anchorage after being cooled to 80 DEG C or less, is removed carry out top pressure by cooling cast alloys from filling anchor rack.
Compared with the prior art, the advantages of the present invention are as follows：
1) the filling anchor compactness of the anchorage of the superhigh intensity major diameter steel wire strand of 127-6mm-2060MPa or more is reached
To 95% or more, 3% is improved than traditional hot casting anchor anchorage compactness.
2) alloy body of casting retraction value is not more than 5mm after top pressure, and alloy, which pours into the depth of steel tendon, after body of casting dissection to reach
To the 3/4 of anchorage cone segments, without shrinkage cavity on the body of casting.
3) it is 10 to 20 DEG C lower than traditional hot casting anchor to be cast in temperature, has saved the energy, and avoids and excessively high is cast in temperature
Influence to high-tensile steel wires performance.
4) for the superhigh intensity major diameter steel wire strand of 127-6mm-2060MPa or more, anchoring efficiency reaches 100%
More than, i.e., it is broken under load in strand nominal, the alloy body of casting does not crack, and is not crushed, and steel wire is not extracted.
5) on the basis of the bond length effective with high-tensile steel wires of raising alloy above, to reduce high intensity Large-diameter Steel
Silk strand anchorage length, diminution anchorage size provide advantage, i.e., under the premise of reaching identical bond length, the application
Reserved anchorage length, which is compared, uses anchorage length reserved needed for other anchoring materials shorter, and then can reduce the ruler of anchorage
It is very little.
Description of the drawings
Fig. 1 is the preparation schematic diagram that main cable strand fills before anchor in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of heading steel wire in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of sub-wire plate end face in the embodiment of the present invention；
Fig. 4 is the schematic diagram that main cable strand fills after anchor in the embodiment of the present invention.
1 heading steel wire, 2 wire sub-panels, 3 main push-towing rope steel wires, 4 main cable strands.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
Embodiment 1
The present embodiment is related to a kind of anchoring material, is used for the superhigh intensity major diameter steel wire main cable of 6mm-2060MPa or more
The end anchorage of strand, chemical composition are Al 3.5%, Cu 1.8%, Mg 0.002%, rare earth member by mass percentage
Element 0.005%, cast temperature control within the scope of 440 DEG C to 460 DEG C.Rare earth element is selected from La and Ce.
Superhigh intensity major diameter steel wire main cable strand fills anchor method, includes the following steps
(1) it will be put into heating furnace and melt according to the alloy pig of formula melting, form alloy molten solution：It will according to theoretical calculation
Zn-Cu2% and Zn-Al10%, Zn-Al15%, Zn-Al30% alloy pig are arranged in pairs or groups according to a certain percentage, are put into heating furnace, are added
Heat is melted and is sufficiently stirred；Mg and rare earth element are dilute with Zn-Al10%-Mg- according to the flowing implementations of alloy in actual production
The formal character addition of soil, Zn-Al15%-Mg- rare earths, Zn-Al30%-Mg- rare earth alloy ingots；It is measured in melt after stirring
Each element whether meet design requirement, be such as unsatisfactory for, the fine tuning of alloying component can be carried out by adding relevant alloy pig,
Until melt ingredient reaches related request；
(2) by anchorage installation to strand, the steel wire in anchorage is formed separately " broom " shape, allows strand steel wire in dispersion
Shape may be selected part steel wire carrying out heading, and heading diameter is not less than 1.4 times of steel wire diameter, and heading height is not less than steel wire
Diameter is ensured that strand sub-wire is uniform, exhaust passage is arranged on wire sub-panel, it is ensured that cast using the wire sub-panel that thickness is 1.5mm
Gas discharge in journey, avoids gas from entering and forms shrinkage cavity in anchoring material；
(3) it uses heat-resisting material to carry out the leak stopping sealing of anchorage bottom, and preheats and scoop packet, its temperature is made to be not less than alloy
The cast temperature of the half of melt temperature, alloy solution is 440 DEG C to 460 DEG C；
(4) be cast in, be cast in it is middle percussion is carried out to anchorage with wooden mallet, by alloy molten solution gas be discharged, prevent fill anchor
Gas is introduced in the process, improves the compactness of alloy；
(5) shrinkage hole will be formed after alloy is cast in, therefore carries out supplementary irrigation, and the opportunity of supplementary irrigation is selected in the alloy in shrinkage hole and reaches
To the state of initial set；
(6) anchorage after being cooled to 80 DEG C or less, is removed carry out top pressure by cooling cast alloys from filling anchor rack.
Implementation result：Aforesaid operations 10 times or more are repeated, anchoring efficiency reaches 100%, fills anchor compactness and reaches 95%
More than, alloy body of casting retraction value is below 5mm after top pressure, the body of casting dissection after alloy pour into steel tendon depth reach anchorage cone
The 3/4 of body section, on the body of casting without shrinkage cavity (for traditional anchoring material, poor fluidity, in order to which reach design requirement bonds length
Degree, need longer reserved filling anchor length could realize the depth of i.e. body of casting injection anchorage account for the ratio of anchorage cone segment length compared with
Small, even if can be than more loose if realizing the body of casting reluctantly, compactness be inadequate).
Embodiment 2
The present embodiment is related to a kind of anchoring material, is used for the superhigh intensity major diameter steel wire main cable of 60mm-2060MPa or more
The end anchorage of strand, chemical composition are by mass percentage Al 0.4%, Cu 2.0%, rare earth element 0.08%,
Remaining is zinc, cast temperature：445 DEG C to 465 DEG C, rare earth element is selected from La and Ce.
Superhigh intensity major diameter steel wire main cable strand fills anchor method, includes the following steps
(1) it will be put into heating furnace and melt according to the alloy pig of formula melting, form alloy molten solution：It will according to theoretical calculation
Zn-Cu2% and Zn-Al10%, Zn-Al15%, Zn-Al30% alloy pig are arranged in pairs or groups according to a certain percentage, are put into heating furnace, are added
Heat is melted and is sufficiently stirred；Rare earth element is according to the flowing implementations of alloy in actual production with Zn-Al10%- rare earths, Zn-
The formal character addition of Al15%- rare earths, Zn-Al30%- rare earth alloy ingots；After stirring measure melt in each element be
It is no to meet design requirement, it is such as unsatisfactory for, the fine tuning of alloying component can be carried out by adding relevant alloy pig, until melt ingredient
Reach related request.
(2) by anchorage installation to strand, the steel wire in anchorage is formed separately " broom " shape, allows strand steel wire in dispersion
Shape may be selected part steel wire carrying out heading, and heading diameter is not less than 1.4 times of steel wire diameter, and heading height is not less than steel wire
Diameter is ensured that strand sub-wire is uniform, exhaust passage is arranged on wire sub-panel, it is ensured that cast using the wire sub-panel that thickness is 3.2mm
Gas discharge in journey, avoids gas from entering and forms shrinkage cavity in anchoring material.
(3) it uses heat-resisting material to carry out the leak stopping sealing of anchorage bottom, and preheats and scoop packet, its temperature is made to be not less than alloy
The cast temperature of the half of melt temperature, alloy solution is 445 DEG C to 465 DEG C.
(4) it is cast in, is cast in middle hammered into shape with glue and percussion is carried out to anchorage, the gas in alloy molten solution is discharged, prevent from filling anchor
Gas is introduced in the process, improves the compactness of alloy.
(5) shrinkage hole will be formed after alloy is cast in, the alloy in shrinkage hole carries out supplementary irrigation in the state of reaching initial set, mend
The operation of filling and step 4 are identical.
(6) anchorage after being cooled to 80 DEG C or less, is removed carry out top pressure by cooling cast alloys from filling anchor rack.
Implementation result：Aforesaid operations 10 times or more are repeated, anchoring efficiency reaches 100%, fills anchor compactness and reaches 95%
More than, alloy body of casting retraction value is within the scope of 3~5mm after top pressure, and alloy pours into the depth of steel tendon and reaches after body of casting dissection
The 3/4 of anchorage cone segments meets design requirement without shrinkage cavity on the body of casting.
Embodiment 3
The present embodiment is related to a kind of anchoring material, is used for the superhigh intensity major diameter steel wire master of 100mm-2060MPa or more
The end anchorage of cable stock, chemical composition are by mass percentage Al 5.5%, Cu 1.4%, Mg 0.005%,
Bi0.001%, remaining is zinc, cast temperature：430 DEG C to 450 DEG C.
Superhigh intensity major diameter steel wire main cable strand fills anchor method, includes the following steps
(1) it will be put into heating furnace and melt according to the alloy pig of formula melting, form alloy molten solution：It will according to theoretical calculation
Zn-Cu2% and Zn-Al10%, Zn-Al15%, Zn-Al30% alloy pig are arranged in pairs or groups according to a certain percentage, are put into heating furnace, are added
Heat is melted and is sufficiently stirred；Mg is with the formal character of Zn-Al10%-Mg, Zn-Al15%-Mg, Zn-Al30%-Mg alloy pig
It is added；Bi is added with the formal character of Zn-Al10%-Bi, Zn-Al15%-Bi, Zn-Al30%-Bi alloy pig；After stirring
Whether each element measured in melt meets design requirement, is such as unsatisfactory for, and can carry out alloy by adding relevant alloy pig
The fine tuning of ingredient, until melt ingredient reaches related request.
(2) by anchorage installation to strand, the steel wire in anchorage is formed separately " broom " shape, allows strand steel wire in dispersion
Shape may be selected part steel wire carrying out heading, and heading diameter is not less than 1.4 times of steel wire diameter, and heading height is not less than steel wire
Diameter is ensured that strand sub-wire is uniform, exhaust passage is arranged on wire sub-panel, it is ensured that cast using the wire sub-panel that thickness is 3.2mm
Gas discharge in journey, avoids gas from entering and forms shrinkage cavity in anchoring material.
(3) it uses heat-resisting material to carry out the leak stopping sealing of anchorage bottom, and preheats and scoop packet, its temperature is made to be not less than alloy
The cast temperature of the half of melt temperature, alloy solution is 445 DEG C to 465 DEG C.
(4) it is cast in, is cast in middle hammered into shape with glue and percussion is carried out to anchorage, the gas in alloy molten solution is discharged, prevent from filling anchor
Gas is introduced in the process, improves the compactness of alloy.
(5) shrinkage hole will be formed after alloy is cast in, the alloy in shrinkage hole carries out supplementary irrigation in the state of reaching initial set, mend
The operation of filling and step 4 are identical.
(6) anchorage after being cooled to 80 DEG C or less, is removed carry out top pressure by cooling cast alloys from filling anchor rack.
Implementation result：Repeat aforesaid operations 10 times or more, anchoring efficiency reaches 100%, fill anchor compactness reach 95% with
On, alloy body of casting retraction value is within 5mm after top pressure, and alloy pours into the depth of steel tendon and reaches anchorage cone after body of casting dissection
The 3/4 of section meets design requirement without shrinkage cavity on the body of casting.
Comparative example 1
This comparative example designs a kind of anchoring material, is used for the superhigh intensity major diameter steel wire main cable of 60mm-2060MPa or more
The end anchorage of strand, chemical composition are Al 0.3%, Cu 1.8%, rare earth element by mass percentage0.2~ 0.25%, remaining is zinc, cast temperature：445 DEG C to 465 DEG C, rare earth element is selected from La and Ce.
The operating procedure for filling anchor method is identical with embodiment 2.
Implementation result：Aforesaid operations 5 times or more are repeated, each rare earth element fluctuates in range, and anchoring efficiency reaches
100%, it fills anchor compactness and only has four times to reach 95%, alloy body of casting retraction value is closed within 5mm after body of casting dissection after top pressure
Gold pour into steel tendon depth account for anchorage cone segments total length ratio be 0.6-0.7, the accidental shrinkage hole of the body of casting.
That is, when rare earth element adds too high levels, mobility is deteriorated instead, this is because rare earth element is in the base the same as molten
Spend it is small, once too high levels will appear rare earth aggregation and float on alloy solution surface, reduce its reactivity, Wu Faji instead
When reduction-oxidation zinc, clean-up effect is deteriorated, and zinc bath viscosity is got higher so that goes out the dynamic speed of zinc liquid stream between the steel tendon after zinc liquid
It spends slack-off.
Comparative example 2
This comparative example designs a kind of anchoring material, is used for the superhigh intensity major diameter steel wire main cable of 6mm-2060MPa or more
The end anchorage of strand, chemical composition are Al 3.0%, Cu 2.0%, Mg 0.007%, rare earth member by mass percentage
Element 0.005%, cast temperature control within the scope of 440 DEG C to 460 DEG C.Rare earth element is selected from La and Ce.
The operating procedure for filling anchor method is identical with embodiment 1.
Implementation result：It fills anchor compactness and reaches 95%, alloy body of casting retraction value is within 5mm after top pressure, body of casting solution
It cuts open rear alloy and pours into the depth of steel tendon and reach the 3/4 of anchorage cone segments, without shrinkage cavity on the body of casting, be broken load in strand nominal
Under, alloy body of casting cracking, partial crushing.
When Mg adds too high levels, excessively high magnesium can drop low-alloyed plasticity, be easily broken cracking, can not fit instead instead
Answer high intensity, superhigh intensity main cable strand filling anchor.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiment
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (10)
1. a kind of superhigh intensity major diameter steel wire main cable strand anchoring material, it is characterised in that：It fills anchor compactness and is not up to
95% or more, improve 3% than traditional hot casting anchor anchorage compactness；Alloy body of casting retraction value is not more than 5mm after anchorage top pressure,
Alloy pours into the depth of steel tendon and can reach the 3/4 of anchorage cone segments after body of casting dissection, without shrinkage cavity on the body of casting；
Its chemical composition by mass percentage include as following formula in one kind：
One of formula：Al 5.0%~6.0%, Cu 1.2%~1.6%, Mg 0~0.005%, remaining is zinc, casting temperature
Degree：430 DEG C to 450 DEG C；
The two of formula：Al 2.0%~5.0% (does not include 5.0%), and Cu 1.6%~2.0% (does not include 1.6%), Mg
0.001~0.005%, rare earth element 0.001~0.2%, remaining is zinc, and magnesium elements and rare earth element can be same in the above formula
Shi Tianjia can also be added selectively, cast temperature：440 DEG C to 460 DEG C；
The three of formula：Al 0.1~0.5%, Cu 1.8%~2.2%, rare earth element 0.001~0.10%, remaining is zinc,
Cast temperature：445 DEG C to 465 DEG C.
2. superhigh intensity major diameter steel wire main cable strand anchoring material according to claim 1, it is characterised in that：It is formulated it
In two, rare earth element and Mg can be added simultaneously, can also select an addition.
3. superhigh intensity major diameter steel wire main cable strand anchoring material according to claim 1, it is characterised in that：According to anchor
Have size, in chemical composition can addition element Bi to improve alloy flowability.
4. superhigh intensity major diameter steel wire main cable strand anchoring material according to claim 3, it is characterised in that：The Bi
Additive amount be 0~0.1%.
5. superhigh intensity major diameter steel wire main cable strand anchoring material according to claim 1, it is characterised in that：It is described dilute
Earth elements are La and Ce.
6. superhigh intensity major diameter steel wire main cable strand anchoring material according to claim 1, it is characterised in that：Its raw material
Selected from Zn-Cu alloys, Zn-Al alloy, Mg and rare earth element according to the flowing implementations of alloy in actual production with Zn-
The formal character addition of Al10%-Mg- rare earths, Zn-Al15%-Mg- rare earths, Zn-Al30%-Mg- rare earth alloy ingots.
7. superhigh intensity major diameter steel wire main cable strand anchoring material according to claim 6, it is characterised in that：It is described
Zn-Al alloy can be selected from one or more in Zn-Al10%, Zn-Al15%, Zn-Al30% according to Al content difference.
8. a kind of superhigh intensity major diameter steel wire main cable strand fills anchor method, it is characterised in that：Include the following steps
(1) it will be put into heating furnace and melt according to the alloy pig of formula melting, form alloy molten solution：According to theoretical calculation by Zn-
Cu2% and Zn-Al10%, Zn-Al15%, Zn-Al30% alloy pig are arranged in pairs or groups according to a certain percentage, are put into heating furnace, heating
Melt and is sufficiently stirred；Mg and rare earth element according to the flowing implementations of alloy in actual production with Zn-Al10%-Mg- rare earths,
The formal character addition of Zn-Al15%-Mg- rare earths, Zn-Al30%-Mg- rare earth alloy ingots；It is measured in melt after stirring
Whether each element meets design requirement, is such as unsatisfactory for, and the fine tuning of alloying component can be carried out by adding relevant alloy pig, directly
Reach related request to melt ingredient；
(2) by anchorage installation to strand, the steel wire in anchorage is formed separately " broom " shape (divergent shape of taper), may be selected
Part steel wire is subjected to heading, heading diameter is not less than 1.4 times of steel wire diameter, and heading height is not less than steel wire diameter, optional
It selects using the wire sub-panel that thickness is 1.5mm~3mm, ensures that strand sub-wire is uniform, exhaust passage is set on wire sub-panel, it is ensured that casting
Gas discharge in the process, avoids the formation of shrinkage cavity；
(3) it uses heat-resisting material to carry out the leak stopping sealing of anchorage bottom, and preheats and scoop packet, its temperature is made to be not less than alloy molten solution
The half of temperature；
(4) it is cast in, percussion is carried out to anchorage in being cast in, the gas in alloy molten solution is discharged, prevents from introducing during filling anchor
Gas improves the compactness of alloy；
(5) shrinkage hole will be formed after alloy is cast in, not only influence intensity but also will be influenced beautiful, it is therefore necessary to carry out supplementary irrigation, supplementary irrigation
Opportunity is selected in the state that the alloy in shrinkage hole reaches initial set；
(6) anchorage after being cooled to 80 DEG C or less, is removed carry out top pressure by cooling cast alloys from filling anchor rack.
9. superhigh intensity major diameter steel wire main cable strand according to claim 8 fills anchor method, it is characterised in that：Step 1
One of formula of alloy molten solution：Al 5.0%~6.0%, Cu 1.2%~1.6%, Mg 0~0.005%, remaining is zinc,
Cast temperature：430 DEG C to 450 DEG C；
The two of formula：Al 2.0%~5.0% (does not include 5.0%), and Cu 1.6%~2.0% (does not include 1.6%), Mg
0.001~0.005%, rare earth element 0.001~0.2%, remaining is zinc, and magnesium elements and rare earth element can be same in the above formula
Shi Tianjia can also be added selectively, cast temperature：440 DEG C to 460 DEG C；
The three of formula：Al 0.1~0.5%, Cu 1.8%~2.2%, rare earth element 0.001~0.10%, remaining is zinc,
Cast temperature：445 DEG C to 465 DEG C.
10. superhigh intensity major diameter steel wire main cable strand according to claim 8 fills anchor method, it is characterised in that：Fill anchor
Compactness has reached 95% or more, and 3% is improved than traditional hot casting anchor anchorage compactness；The alloy body of casting bounces back after anchorage top pressure
Value is not more than 5mm, and alloy pours into the depth of steel tendon and can reach the 3/4 of anchorage cone segments after body of casting dissection, without shrinkage cavity on the body of casting.
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Cited By (1)
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| CN114192745A (en) * | 2021-11-05 | 2022-03-18 | 江苏法尔胜缆索有限公司 | Novel main cable strand anchor grouting method for suspension bridge |
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