CN104817307A - Tunnel central ditch, single body thereof and method for manufacturing single body - Google Patents
Tunnel central ditch, single body thereof and method for manufacturing single body Download PDFInfo
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- CN104817307A CN104817307A CN201510208315.XA CN201510208315A CN104817307A CN 104817307 A CN104817307 A CN 104817307A CN 201510208315 A CN201510208315 A CN 201510208315A CN 104817307 A CN104817307 A CN 104817307A
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Abstract
The invention relates to the technical field of underground engineering, in particular to a tunnel central ditch, a single body thereof and a method for manufacturing the single body. Connecting ends are respectively arranged at two ends of the single body of the tunnel central ditch, openings are formed in the connecting ends, the single body of the tunnel central ditch is of a groove structure, and a concrete cover plate covers an upper opening of the groove structure; mixture of quartz sand, steel fibers, 425R ordinary silicate cement, micro-silicon powder, mineral waste material powder, water reducing agents and water are poured on the side walls and the bottom of the single body of the tunnel central ditch. A plurality of single bodies of the tunnel central ditch are serially connected with one another to form the tunnel central ditch, the distance between each two single bodies is shorter than 8 millimeters, and altitude difference is smaller than 5 millimeters. The method includes portioning materials; mixing the materials to obtain the mixtures; feeding the mixtures into molds and molding the mixtures in a vibration manner; carrying out primary curing on the mixtures; carrying out final curing on the mixtures to obtain the single body of the tunnel central ditch. The tunnel central ditch, the single body and the method have the advantages that the structure of the single body of the tunnel central ditch is preliminarily manufactured outside a hole and then is mounted in a tunnel, accordingly, the construction speed can be increased, and the construction quality can be improved.
Description
Technical field
The present invention relates to underground works technical field, be specifically related to tunnel Central drain monomer and preparation method and tunnel Central drain.
Background technology
At present, high-speed railway double track tunnel Central drain generally adopts C30 onsite concrete, and speed of application is slow, and construct in the tunnel in and curing condition poor, making construction quality be difficult to be protected, easily there is breakage in edge, ditch.
Summary of the invention
Embodiments of the invention provide a kind of tunnel Central drain monomer and preparation method and tunnel Central drain, can solve cast in situs and impel speed of application slow, the problem of construction quality difference.
There is provided a kind of tunnel Central drain monomer according to an aspect of the present invention, its two ends are respectively coupling end, are groove structure, the cover plate of the upper shed oversite concrete of described groove structure; Sidewall and the bottom of described tunnel Central drain monomer are built by the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water, blending ratio is: in mass, ordinary Portland cement: quartz sand: SILICA FUME: slag powders: steel fiber: water reducer, water are 1:1.1 ~ 1.5:0.1 ~ 0.5:0.2 ~ 0.5:1.0 ~ 3.0:0.01 ~ 0.03:0.1 ~ 0.4.
In certain embodiments, be preferably, described concrete cover is provided with hollow out.
In certain embodiments, be preferably, described hollow out is multiple rectangular through-hole, and all rectangular through-hole are arranged in parallel.
In certain embodiments, be preferably, described cover plate is built by the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water.
The present invention additionally provides a kind of tunnel Central drain on the other hand, form by multiple above-mentioned tunnels Central drain is monomer series-connected, the coupling end contact of adjacent two described tunnel Central drain monomers, the spacing connected between adjacent two described tunnel Central drain monomers is less than 8 millimeters, and faulting of slab ends is less than 5 millimeters.
The present invention additionally provides the preparation method of a kind of described tunnel Central drain monomer on the other hand, comprising:
Step 1, prepare raw material, described raw material comprises: quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water; The adding proportion of described raw material is: calculate by quality ratio, 425R ordinary Portland cement: quartz sand: SILICA FUME: slag powders: steel fiber: water reducer, water are 1:1.1 ~ 1.5:0.1 ~ 0.5:0.2 ~ 0.5:1.0 ~ 3.0:0.01 ~ 0.03:0.1 ~ 0.4;
Step 2, is undertaken mixing and stirring by described raw material and obtains mixing and stirring material;
Step 3, the described material that mixes and stirs is sent into mould, and vibrate shaping early-products;
Step 4, is undertaken described early-products heating up, constant temperature, cooling is triphasic just supports;
Step 5, to the early-products form removal process after just supporting, and send into that final support room carries out heating up, constant temperature, cooling support triphasic end, obtains tunnel Central drain monomer.
In certain embodiments, be preferably, described step 2 comprises:
Quartz sand, steel fiber are carried out mix and obtain the first mixture, and duration of mixing is no less than 4 minutes;
425R ordinary Portland cement, slag powders, SILICA FUME are added to mix in described first mixture and obtained the second mixture, and duration of mixing is 1.5-3 minute;
Water, water reducer are added to the second mixture mix and obtain mixing and stirring material, duration of mixing 3.5-5 minute.
In certain embodiments, be preferably, in described step 3,
Describedly to vibrate shaping comprising: carry out continous way vibration in the mode that the described vibration acceleration mixing and stirring material is identical with vibrating bed, and Troweling press finishing mould upper limb mix and stir material;
The used time of mixing and stirring material feeding mould described in all is less than 30 minutes; During continous pouring, the interval of adjacent two die perfusions is less than 6 minutes.
In certain embodiments, be preferably, after affiliated step 3, before described step 4, described preparation method also comprises: covered with plastic film above early-products, then quietly stops, and is 3-7 hour between the quiet stopping time.
In certain embodiments, preferably, the temperature of just supporting in step 4 is between 40 ± 5 DEG C, relative humidity >=70%, and heat-up rate is less than 12 DEG C/h, and cooling rate is less than 15 DEG C/h, just supports with the described quiet total time stopped in 24 hours.
In certain embodiments, be preferably, the temperature of supporting eventually in step 5 is between 80 ± 5 DEG C, and supporting the time is eventually 45-50 hour, and heat-up rate is less than 12 DEG C/h, and cooling rate is less than 15 DEG C/h.
The tunnel Central drain monomer provided by embodiments of the invention, and preparation method thereof with tunnel Central drain, compared with prior art, by getting the raw materials ready, mix, enter mould, vibrate shaping, just support, support eventually and prefabricatedly obtain tunnel Central drain monomer, be stitched together monomer series-connected for multiple tunnel Central drains, adjacent two distances are within 8 millimeters, faulting of slab ends is within 5 millimeters, and tunnel construction site is spliced into tunnel Central drain.Because tunnel Central drain monomer is built prefabricated by the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water in advance, material is light, easy operation, the surface of tunnel Central drain monomer keeps clean, in-site installation is convenient, improve operating efficiency, and there will not be the situation of the too much foreign material of remained on surface, improve curing condition.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, discuss to the accompanying drawing used required in embodiment or description of the prior art below, obviously, only some embodiments of the present invention in the technical scheme be described by reference to the accompanying drawings, for those of ordinary skills, under the prerequisite not paying creative work, other embodiment and accompanying drawing thereof can also be obtained according to these accompanying drawing illustrated embodiments.
Fig. 1 is the cross sectional representation of Central drain monomer in tunnel in one embodiment of the invention;
Fig. 2 is the schematic perspective view of tunnel Central drain in one embodiment of the invention.
Embodiment
Carry out clear complete description below with reference to accompanying drawing to the technical scheme of various embodiments of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not needing creative work, all in the scope that the present invention protects.
Consider that the Central drain of current tunnel two-wire is cast in situs, speed of application is slow, and easily there is breakage in the edge of building rear center ditch, the problem of curing condition difference, present embodiments provide a kind of tunnel Central drain monomer, and preparation method thereof with tunnel Central drain.
A kind of tunnel Central drain monomer, its two ends are respectively coupling end, are groove structure, the cover plate of the upper shed oversite concrete of described groove structure; Cover plate arranges hollow out; Sidewall and the bottom of described tunnel Central drain monomer are built by the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water.
A kind of tunnel Central drain, form by multiple above-mentioned tunnels Central drain is monomer series-connected, the coupling end contact of adjacent two described tunnel Central drain monomers, the spacing connected between adjacent two described tunnel Central drain monomers is less than 8 millimeters, and faulting of slab ends is less than 5 millimeters.
A preparation method for above-mentioned tunnel Central drain monomer, comprising:
Step 1, prepare raw material, described raw material comprises: quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water; The adding proportion of described raw material is: calculate by quality ratio, 425R ordinary Portland cement: quartz sand: SILICA FUME: slag powders: steel fiber: water reducer, water are 1:1.1 ~ 1.5:0.1 ~ 0.5:0.2 ~ 0.5:1.0 ~ 3.0:0.01 ~ 0.03:0.1 ~ 0.4;
Step 2, is undertaken mixing and stirring by described raw material and obtains mixing and stirring material;
Step 3, the described material that mixes and stirs is sent into mould, and vibrate shaping early-products;
Step 4, is undertaken described early-products heating up, constant temperature, cooling is triphasic just supports;
Step 5, to the early-products form removal process after just supporting, and send into that final support room carries out heating up, constant temperature, cooling support triphasic end, obtains tunnel Central drain monomer.
By getting the raw materials ready, mix, enter mould, vibrate shaping, just support, support eventually and prefabricatedly obtain tunnel Central drain monomer, be stitched together monomer series-connected for multiple tunnel Central drains, adjacent two distances are within 8 millimeters, and faulting of slab ends is within 5 millimeters, and tunnel construction site is spliced into tunnel Central drain.Because tunnel Central drain monomer is built prefabricated by the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water in advance, material is light, easy operation, the surface of tunnel Central drain monomer keeps clean, in-site installation is convenient, improve operating efficiency, and there will not be the situation of the too much foreign material of remained on surface, improve curing condition.
The multiple embodiment of following utilization is described in detail:
The tunnel Central drain that this technology relates to forms by tunnel Central drain is monomer series-connected, and tunnel Central drain monomer prefabricatedly to form in advance non-at-scene.
Tunnel Central drain monomer in this example, as shown in Figure 1, its two ends are respectively coupling end, and coupling end opening, because multiple tunnels Central drain is together monomer series-connected, the end face of coupling end is not closed, to form unobstructed pipeline.These tunnel Central drains are grouped together prefabricated in advance, directly install in tunnel, can save a large amount of time, and, prefabricatedly can improve the quality of monomer and overall standard, and then improve curing condition.Tunnel Central drain monomer 1 is groove structure, the cover plate of the upper shed oversite concrete of groove structure.
The present invention not only have employed mode prefabricated in advance, also large based on the monomer weight that original employing existing concrete is prefabricated, is difficult to mobile operation, therefore, inventors performed new improvement, form new progressive technical scheme.The sidewall of tunnel Central drain monomer and the dividing plate separating each district are the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water.Its Raw adding proportion is calculate by quality ratio, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water; The adding proportion of raw material is: calculate by quality ratio, 425R ordinary Portland cement: quartz sand: SILICA FUME: slag powders: steel fiber: water reducer, water are 1:1.1 ~ 1.5:0.1 ~ 0.5:0.2 ~ 0.5:1.0 ~ 3.0:0.01 ~ 0.03:0.1 ~ 0.4.Water reducer is methylene radical dimethyl sodium dinaphthalenesulfonate polymkeric substance.That is, tunnel Central drain monomer 1 is RPC RPC material, this material possesses the type material of superstrength, high tenacity, high-durability, good volume stability, the New Building Materials that a kind of mechanical property, weather resistance are all very superior, prefabricated outside tunnel, improve curing condition, improve construction quality.
Draining based on Central drain needs, and various shape can be made in the vertical section of Central drain, and the convenient processing of rectangle, water capacity is medium, and inverted trapezoidal can increase water capacity, and U-shaped can improve drainage effect, prevents angle ponding.
Because Central drain upper shed covers cover plate 2, cover plate 2 can prevent exterior object from entering Central drain, blocking Central drain.On the other hand, cover plate 2 is provided with multiple hollow out 3, the material usage that cover plate is built in advance can be reduced, the steam inside and outside ditch, air pressure can be impelled again to keep balance.
Based on the design of above-mentioned hollow out, the shape of hollow out 3 can have multiple choices, such as: multiple rectangle be parallel to each other, or the positive dirction be evenly distributed; Or the trilateral be evenly distributed; Or other shape.
It should be noted that, above-mentioned layout can be changed under other conditions, and those skilled in the art can adjust according to actual needs.
Below, the preparation method of above-mentioned tunnel Central drain monomer is described:
Step 101, prepares raw material;
Raw material comprises: quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water; The adding proportion of described raw material is: calculate by quality ratio, 425R blending ratio is: in mass, ordinary Portland cement: quartz sand: SILICA FUME: slag powders: steel fiber: water reducer, water are 1:1.1 ~ 1.5:0.1 ~ 0.5:0.2 ~ 0.5:1.0 ~ 3.0:0.01 ~ 0.03:0.1 ~ 0.4.Water reducer is methylene radical dimethyl sodium dinaphthalenesulfonate polymkeric substance.The material that these raw materials are formed can be called RPC (RPC).
Step 102, carries out mix by raw material and obtains mixing and stirring material;
The process of mix can promote the interaction force between raw material, and finally mixes and stirs the state of material, and therefore, contriver has carried out careful research to mix process:
First quartz sand, steel fiber is added, dry mixing (mixing and stirring when namely not adding water) is no less than 4 minutes, then cement, slag powders, SILICA FUME is added, dry mixing 2 minutes (being all fine in the scope of 1.5-3 minute, 2 minutes is the better time); Finally add water, water reducer, stir 4 minutes (3.5-5 minute), obtain mixing and stirring material.
It should be noted that, accurately control water consumption, add water after not allowing RPC mix to go out stirrer; The churning time that head mixes 4 minutes can not be very few, otherwise steel fiber just can not be uniformly dispersed completely, and after adding the powders such as cement, steel fiber can be united; RPC mixes and stirs and expects that solidification rate quickly at normal temperatures, and viscosity is very large, easily sticky wall, and the RPC stirred mixes and stirs material, and preferably in 30 seconds, discharging is complete.
Step 103, will mix and stir material and send into mould, and vibrate shaping early-products;
Transport the template and the travelling belt that mix and stir material, should not absorb water, not spillage, and ensure discharging and carry unobstructed.
Early-products adopts the moulding process that vibrates, and obtain good jolt ramming effect, makes to mix and stir material and has higher intensity and degree of compactness, must choose reasonable Vibration Technology.It is consistent with vibrating bed that RPC mixes and stirs the vibration acceleration of material after entering mould, avoids great-jump-forward to vibrate as far as possible, reduces power loss, and reduce noise, time of vibration controls at 2 ~ 4min.
Enter the mix after mould at vibration limit, vibrating bed top trowel Troweling press finishing, reach the planeness of standard-required, do not expose steel fiber, do not leak outside around template and mix and stir material, there are burr around tunnel Central drain after will avoiding form removal like this, affect overall appearance, also can save and a large amount of manually go to polish it.
The solidification rate of RPC (RPC) material is very fast, when mixing and stirring material perfusion, pours into complete in best 30 minutes.Many owing to mixing and stirring material, should adopt continous pouring, the largest interval time of pouring into adjacent two is no more than 6 minutes.
Step 104, is undertaken early-products heating up, constant temperature, cooling is triphasic just supports;
Early-products after initial set goes to immediately just supports room, just supports chambers temp and controls between 40 ± 5 DEG C, relative humidity >=70%.Just support by intensification, constant temperature, the maintenance of cooling three phases, heat-up rate control 12 DEG C/within, cooling rate controls within 15 DEG C/h, and thermostat temperature should control at 40 ± 5 DEG C.
Step 105, to the early-products form removal process after just supporting, and send into that final support room carries out heating up, constant temperature, cooling support triphasic end, obtains tunnel Central drain monomer.
Just support form removal after terminating, during form removal, the difference of component surface temperature and envrionment temperature should not more than 15 DEG C.
First plastics film is removed during form removal, from shaper, pour out RPC tunnel Central drain goods.Must not overexert during form removal and damage the outward appearance of tunnel Central drain, reduce the infringement to template, will put down gently when tunnel Central drain is put, early strength is inadequate, prevents fracture, forbids to beat, tunnel Central drain and template to be piled up neatly respectively during form removal, be convenient to transport.
RPC tunnel Central drain after just supporting form removal will move to final support room and carry out steam curing, the temperature of final support room controls at 80 ± 5 DEG C, maintenance 48h, and process of supporting eventually is divided into intensification, constant temperature, cooling three phases, heat-up rate controls at 12 DEG C/h, and cooling rate controls at 15 DEG C/h.When shifting out final support room after supporting end eventually, the difference of component surface temperature and envrionment temperature should more than 15 DEG C.
During RPC tunnel Central drain goods form removal piling, the gap of 30 ~ 50mm should be stayed between goods, be beneficial to the flowing of steam, the article outer surface contacted with steam should be made to amass maximum as far as possible, be beneficial to the transmission of heat.For colliding with and steam flow when avoiding starting shipment, between RPC goods piling and the gap of 200mm should be stayed between piling and maintenance locular wall.Above each RPC goods piling, want covered with plastic film, prevent the water of condensation on chamber cap from directly dripping in product surface, steam can not be sprayed directly on on RPC goods, and steam should be made downwards to spray.
Avoid in final support room using iron component as far as possible, as unavoidably, apply plastics film and wrapped up, or take other measures to cover iron component surface, with anti-pollution RPC product surface, outside the flitch of piling, should plastics film be wrapped up.Periodic cleaning curing room, clean in holding chamber, in case RPC goods are contaminated.Curing room should be able to control room temp exactly, can control intensification cooling rate exactly.
Above step forms the preparation method of complete set, and based on this preparation method, contriver also add step 106 between step 103 and step 104, quietly stops.
Step 106, covered with plastic film above early-products, then quietly stops;
Quietly stopping, is also a composition step of maintenance strictly speaking, forms the quiet maintenance flow process of stopping, just supporting, supporting eventually complete set.
By the RPC goods band template translation after casting on bracket, covered with plastic film above template, scatter and disappear with the moisture evaporation reducing RPC goods, with fork truck, bracket is positioned over smooth Jing Ting district to rest, and check the surface finish of product, treat mix surface initial set, the quiet time controling that stops is in 6 hours (3-7 hour).
Based on this step, quiet stop and just support can control in 24 hours total time.
After adding step 106, form more complete preparation method further again.Based on outside above-mentioned preparation method, before being spliced into tunnel Central drain to tunnel Central drain monomer, need to deposit tunnel Central drain, i.e. step 107:
Step 107, depositing of tunnel Central drain monomer.
Tunnel Central drain monomer shifts out final support room after supporting eventually, edge-on layered stacked, every interlayer chock bar or flexible pipe, pile up and be highly no more than four layers, the RPC tunnel Central drain tarpaulin of piling covers, and will handle with care when depositing tunnel Central drain, and piling up of product will be convenient to product export entrucking.
Define again from being prepared into a set of more complete method deposited based on step 101-107.
Next, the tunnel Central drain of installation method and series connection that tunnel Central drain monomer is spliced into tunnel Central drain is described:
Tunnel Central drain, as shown in Figure 2: be in series by multiple above-mentioned tunnel Central drain monomer 1, the coupling end contact of adjacent two described tunnel Central drain monomers, the spacing connected between adjacent two described tunnel Central drain monomers is less than 8 millimeters, and faulting of slab ends is less than 5 millimeters.。
Concrete installation method: tunnel Central drain prefabricated section is installed and utilized loop wheel machine to lift by crane, and laser is located.The void of tunnel bottom quarrel should first clean up before installing by tunnel Central drain block, gets out level bar, is carved with the target of crosshair, iron hammer, concrete wedge etc.Must first with spade cleaning during clear quarrel, then use high pressure water flushing wash clean, void on the scar of Central drain block both sides, tunnel quarrel should clean up, and bottom the tunnel Central drain block avoiding dedusting fan recirculated water rock quarrel to be flushed to cleaning up, affects grouting quality.
Tunnel Central drain block is transported to device place, predetermined installation site is transported to loop wheel machine, target is put into Central drain front end, Central drain block tunnel, tunnel, handling loop wheel machine makes tunnel Central drain block drop to laser beam irradiation on the horizontal hair of crosshair, then handle loop wheel machine to move left and right, make laser beam be in the center of crosshair, represent that tunnel Central drain block is in design attitude.Level bar is placed on the tunnel Central drain block end face direction vertical with tunnel axis, slowly regulates tunnel Central drain loop wheel machine chain lifting, until level bar bubble is placed in the middle, represent Central drain block top, tunnel level.
Note following standard in an installation:
Central drain block installation tolerance deviation in tunnel is as follows:
Deviation≤the 30mm of elevation, center line and design attitude;
Faulting of slab ends≤5mm between two pieces of tunnel Central drain blocks;
Maximum clearance≤the 8mm of two pieces of tunnel Central drain block seam crossings.
In general:
1. tunnel Central drain adopts outside hole prefabricated, and installation in hole, has increased substantially the speed of application of tunnel Central drain.Improve that tunnel is prefabricated, factorial construction level.
2. compared with cast-in-place with in hole, outside hole, prefabricated tunnel Central drain has good construction environment and curing condition, therefore can increase substantially the construction quality of tunnel Central drain, prevents slot wedge damaged.
3. by adopting the RPC (RPC) of high strength, under the prerequisite not affecting tunnel Central drain resistance to compression, folding strength, significantly can reduce tunnel Central drain thickness, saving concrete and amount of reinforcement.
Various embodiment provided by the invention can combine as required in any way mutually, the technical scheme obtained by this combination, also within the scope of the invention.
Obviously, without departing from the spirit and scope of the present invention, those skilled in the art can carry out various change and modification to the present invention.If to change of the present invention these and modification is within the scope of claim of the present invention and equivalent thereof, then the present invention also will comprise these and change and modification.
Claims (10)
1. a tunnel Central drain monomer, is characterized in that, its two ends are respectively coupling end, and coupling end opening, be groove structure, the cover plate of the upper shed oversite concrete of described groove structure; Described concrete cover is provided with hollow out.
2. tunnel as claimed in claim 1 Central drain monomer, it is characterized in that, sidewall and the bottom of described tunnel Central drain monomer are built by the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water.
3. tunnel as claimed in claim 2 Central drain monomer, it is characterized in that, described hollow out is multiple rectangular through-hole, and all rectangular through-hole are arranged in parallel.
4. the tunnel Central drain monomer as described in any one of claim 1-3, is characterized in that,
Described cover plate is built by the mixture of quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water; And/or
The vertical section of described tunnel Central drain monomer is any one in rectangle, U-shaped, inverted trapezoidal.
5. a tunnel Central drain, it is characterized in that, form by multiple tunnels Central drain is monomer series-connected, the coupling end contact of adjacent two described tunnel Central drain monomers, the spacing connected between adjacent two described tunnel Central drain monomers is less than 8 millimeters, and faulting of slab ends is less than 5 millimeters;
Described tunnel Central drain monomer, its two ends are respectively coupling end, are groove structure, the cover plate of the upper shed oversite concrete of described groove structure, and the vertical section of described tunnel Central drain monomer is any one in rectangle, U-shaped, inverted trapezoidal.
6. a preparation method for Central drain monomer in tunnel described in any one of claim 1-4, is characterized in that, comprising:
Step 1, prepare raw material, described raw material comprises: quartz sand, steel fiber, 425R ordinary Portland cement, SILICA FUME, slag powders and water reducer, water; The adding proportion of described raw material is: calculate by quality ratio, 425R ordinary Portland cement: quartz sand: SILICA FUME: slag powders: steel fiber: water reducer, water are 1:1.1 ~ 1.5:0.1 ~ 0.5:0.2 ~ 0.5:1.0 ~ 3.0:0.01 ~ 0.03:0.1 ~ 0.4;
Step 2, is undertaken mixing and stirring by described raw material and obtains mixing and stirring material;
Step 3, the described material that mixes and stirs is sent into mould, and vibrate shaping early-products;
Step 4, is undertaken described early-products heating up, constant temperature, cooling is triphasic just supports;
Step 5, to the early-products form removal process after just supporting, and send into that final support room carries out heating up, constant temperature, cooling support triphasic end, obtains tunnel Central drain monomer.
7. the preparation method of tunnel as claimed in claim 6 Central drain monomer, it is characterized in that, described step 2 comprises:
Quartz sand, steel fiber are carried out mix and obtain the first mixture, and duration of mixing is no less than 4 minutes;
425R ordinary Portland cement, slag powders, SILICA FUME are added to mix in described first mixture and obtained the second mixture, and duration of mixing is 1.5-3 minute;
Water, water reducer are added to the second mixture mix and obtain mixing and stirring material, duration of mixing 3.5-5 minute.
8. the preparation method of tunnel as claimed in claim 6 Central drain monomer, is characterized in that, in described step 3,
Describedly to vibrate shaping comprising: carry out continous way vibration in the mode that the described vibration acceleration mixing and stirring material is identical with vibrating bed, and Troweling press finishing mould upper limb mix and stir material;
The used time of mixing and stirring material feeding mould described in all is less than 30 minutes; During continous pouring, the interval of adjacent two die perfusions is less than 6 minutes.
9. the preparation method of the tunnel Central drain monomer as described in any one of claim 6-8, is characterized in that, after affiliated step 3, before described step 4, described preparation method also comprises: covered with plastic film above early-products, then quietly stops, and is 3-7 hour between the quiet stopping time.
10. the preparation method of tunnel as claimed in claim 9 Central drain monomer, is characterized in that,
The temperature of just supporting in step 4 is between 40 ± 5 DEG C, relative humidity >=70%, and heat-up rate is less than 12 DEG C/h, and cooling rate is less than 15 DEG C/h, just supports with the described quiet total time stopped in 24 hours; And/or
The temperature of supporting eventually in step 5 is between 80 ± 5 DEG C, and supporting the time is eventually 45-50 hour, and heat-up rate is less than 12 DEG C/h, and cooling rate is less than 15 DEG C/h.
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| CN105863665A (en) * | 2016-04-07 | 2016-08-17 | 石河子大学 | Disposing method for dross of stone tunnel invert |
| CN109591152A (en) * | 2018-11-13 | 2019-04-09 | 青岛赛美畜牧工程有限公司 | A kind of cement excrement dropping-board manufacturing method and manufacturing device |
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| CN109591152A (en) * | 2018-11-13 | 2019-04-09 | 青岛赛美畜牧工程有限公司 | A kind of cement excrement dropping-board manufacturing method and manufacturing device |
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Application publication date: 20150805 |