CN104790976A - Composite column core structure for tunnel lining and manufacturing method of composite column core structure - Google Patents
Composite column core structure for tunnel lining and manufacturing method of composite column core structure Download PDFInfo
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- CN104790976A CN104790976A CN201510206277.4A CN201510206277A CN104790976A CN 104790976 A CN104790976 A CN 104790976A CN 201510206277 A CN201510206277 A CN 201510206277A CN 104790976 A CN104790976 A CN 104790976A
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- 239000002131 composite material Substances 0.000 title abstract description 15
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 239000004567 concrete Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 239000000203 mixture Substances 0.000 claims description 36
- 238000002156 mixing Methods 0.000 claims description 24
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 239000003638 chemical reducing agent Substances 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 20
- 229910021487 silica fume Inorganic materials 0.000 claims description 20
- 239000002893 slag Substances 0.000 claims description 20
- 238000002360 preparation method Methods 0.000 claims description 19
- 239000011398 Portland cement Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 8
- 235000007164 Oryza sativa Nutrition 0.000 claims description 5
- 239000002985 plastic film Substances 0.000 claims description 5
- 229920006255 plastic film Polymers 0.000 claims description 5
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- 230000001133 acceleration Effects 0.000 claims description 3
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- 239000011435 rock Substances 0.000 abstract description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 241000209094 Oryza Species 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000007580 dry-mixing Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of underground engineering, in particular to a composite column core structure for a tunnel lining and a manufacturing method of the composite column core structure. The composite column core structure is columnar, the two ends of the composite column core structure are connecting ends respectively, the length ranges from 2 m to 5 m, and the column diameter ranges from 10 mm to 80 mm. The connecting ends of the composite column core structure are provided with inwards-contracting steps to be sleeved with steel pipe sleeves. The composite column core structures are connected in series to form inner columns, the inner columns are arrayed in a matrix mode to form an inner column structure, concrete is poured around the inner columns of the inner column structure, and the tunnel lining is formed through the whole. The composite column core structure is obtained through material preparing, stirring, mold entering and vibration forming, primary curing and final curing. By means of the method, the composite column core structure is manufactured in advance outside a tunnel. The composite column core structure is of an activated powder concrete structure and is light in weight, high in strength and easy to install, the composite structure is formed by the activated powder concrete and cast-in-place concrete, and loads on surrounding rock and loads on the structure itself can be borne.
Description
Technical field
The present invention relates to underground construction technical field, relate to tunnel lining combined column cored structure and preparation method thereof, more specifically relate to the preparation method of tunnel lining and interior rod structure, combined column cored structure and combined column cored structure.
Background technology
Along with the exploitation of China's underground space, the underground construction of large span gets more and more, in the underground construction of these large spans, China mainly adopts increase lining thickness to bear country rock load and structure self load at present, and lining cutting is thicker, structure self load is larger, cause lining cutting layer thickness to increase further, in underground construction arch liner structure, liner structure is mainly based on compressive stress, stressed unreasonable, cause lot of materials to waste.
Summary of the invention
Embodiments of the invention provide the preparation method of a kind of tunnel lining and interior rod structure, combined column cored structure and combined column cored structure, can solve the thickening of Large Span Underground engineering lining cutting layer and cause steel concrete consumption large, and stressed irrational problem.
There is provided a kind of tunnel lining combined column cored structure according to an aspect of the present invention, be column structure, two ends are respectively link, length is 2-5 rice, post footpath is 10-80 millimeter, and the link of described combined column cored structure arranges the step inwardly inside contracted, and connects for steel pipe socket jacket casing.
In certain embodiments, be preferably, the sidewall of described step has the first screwed hole, and the sidewall of described steel pipe sleeve is having the second screwed hole with the described first superimposed position of screwed hole.
In certain embodiments, be preferably, the sidewall of described step has the first anchor hole, and the sidewall of described steel pipe sleeve is having the second anchor hole with the first superimposed position of anchor hole.
In certain embodiments, be preferably, described combined column cored structure is built by the mixture of quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water; Mixed proportion is: in mass, 425R Portland cement: quartz sand: SILICA FUME: slag powders: steel fibre: water reducing agent, 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.
Another aspect of the present invention additionally provides a kind of interior rod structure of tunnel lining, and it comprises the inner prop of many matrix arrangements, and inner prop described in every root is connected in series by many above-mentioned combined column cored structures and forms, and adjacent two described combined column cored structures are connect by steel pipe socket jacket casing; Steel pipe socket jacket casing in described combined column cored structure link and be fixedly connected with link by fixture.
Another aspect of the present invention additionally provides a kind of tunnel lining, comprises interior rod structure and the concrete structure of above-mentioned tunnel lining, every root inner prop of the described interior rod structure of described concrete structure parcel.
Another aspect of the present invention additionally provides a kind of preparation method of combined column cored structure described above, comprising:
Step 1, prepare raw material, described raw material comprises: quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water; The adding proportion of described raw material is: calculate by quality ratio, 425R Portland cement: quartz sand: SILICA FUME: slag powders: steel fibre: water reducing agent, 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 combined column cored structure.
In certain embodiments, be preferably, described step 2 comprises:
Quartz sand, steel fibre are carried out mix and obtain the first mixture, and duration of mixing is no less than 4 minutes;
425R 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 reducing agent 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 vibrated bed, and Troweling press finishing mould top edge 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 40 ± 5 DEG C, relative humidity >=70%, and programming 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 80 ± 5 DEG C, and supporting the time is eventually 45-50 hour, and programming rate is less than 12 DEG C/h, and cooling rate is less than 15 DEG C/h.
The preparation method of the tunnel lining provided by embodiments of the invention and interior rod structure, combined column cored structure and combined column cored structure, compared with prior art, by getting the raw materials ready, mix, enter mould, vibrate shaping, just support, support eventually and prefabricatedly obtain combined column cored structure, multiple combined column cored structure series connection is stitched together, by steel pipe sleeve (can preferably steel cylinder) connection in the middle of adjacent two combined column cored structures, be spliced into the interior rod structure of tunnel lining.Every root inner prop periphery of interior rod structure all wraps up concrete, the structure composition tunnel lining structure that interior rod structure and concrete are formed.Wherein combined column cored structure is built prefabricated by the mixture of quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water in advance, and this mixture can be described as RPC.RPC (RPC) possesses the characteristic of high strength, high tenacity, high-durability, the inner prop outer wrapping ordinary concrete of combined column cored structure serial connection, overall formation two class concrete composite construction, shared country rock and dead load load.Significantly reduce traditional lining thickness and structure self load, reach the object of energy-saving building material.And the compressive strength of RPC (RPC) can reach more than 160MPa, and its density is only 2400 ~ 2500kg/m
3, and the compressive strength 300MPa of steel, but density is 7850kg/m
3.Compare, the intensity of steel is 2 times of RPC, but its density is 3 times of RPC, and under equality strength condition, RPC concrete is more lightweight than reinforcing bar, transport, install all very convenient, efficiency of construction is high.
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 structural representation of inner prop in one embodiment of the invention;
Fig. 2 is tunnel lining sectional schematic diagram in one embodiment of the invention.
Detailed description of the invention
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.
Considering that current tunnel Large Span Underground engineering lining cutting layer thickeies causes steel concrete consumption large, and stressed irrational problem, present embodiments provide the preparation method of a kind of tunnel lining and interior rod structure, combined column cored structure and combined column cored structure.
Tunnel lining combined column cored structure, be column structure, two ends are respectively link, and length is 2-5 rice, and post footpath is 10-80 millimeter, and the link of described combined column cored structure arranges the step inwardly inside contracted, and connects for steel pipe socket jacket casing.
An interior rod structure for tunnel lining, it comprises the inner prop of many matrix arrangements, and inner prop described in every root is connected in series by many above-mentioned combined column cored structures and forms, and adjacent two described combined column cored structures are connect by steel pipe socket jacket casing; Steel pipe socket jacket casing in described combined column cored structure link and be fixedly connected with link by fixture.
A kind of tunnel lining, it comprises interior rod structure and the concrete structure of above-mentioned tunnel lining, every root inner prop of the described interior rod structure of described concrete structure parcel.
A preparation method for above-mentioned combined column cored structure, comprising:
Step 1, prepare raw material, raw material comprises: quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water; The adding proportion of raw material is: calculate by quality ratio, 425R Portland cement: quartz sand: SILICA FUME: slag powders: steel fibre: water reducing agent, 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 raw material and obtains mixing and stirring material;
Step 3, will mix and stir material and send into mould, and vibrate shaping early-products;
Step 4, is undertaken 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 combined column cored structure.
By getting the raw materials ready, mix, enter mould, vibrate shaping, just support, support eventually and prefabricatedly obtain combined column cored structure, multiple combined column cored structure series connection are stitched together, by steel pipe sleeve (can preferably steel cylinder) connection in the middle of adjacent two combined column cored structures, be spliced into the interior rod structure of tunnel lining.Every root inner prop periphery of interior rod structure all wraps up concrete, the structure composition tunnel lining structure that interior rod structure and concrete are formed.Wherein combined column cored structure is built prefabricated by the mixture of quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water in advance, and this mixture can be described as RPC.RPC (RPC) possesses the characteristic of high strength, high tenacity, high-durability, the inner prop outer wrapping ordinary concrete of combined column cored structure serial connection, overall formation two class concrete composite construction, shared country rock and dead load load.Significantly reduce traditional lining thickness and structure self load, reach the object of energy-saving building material.And the compressive strength of RPC (RPC) can reach more than 160MPa, and its density is only 2400 ~ 2500kg/m
3, and the compressive strength 300MPa of steel, but density is 7850kg/m
3.Compare, the intensity of steel is 2 times of RPC, but its density is 3 times of RPC, and under equality strength condition, RPC concrete is more lightweight than reinforcing bar, transport, install all very convenient, efficiency of construction is high.
The multiple embodiment of following utilization is described in detail:
The inner prop that this technology relates to is in series by combined column cored structure, and combined column cored structure prefabricatedly to form in advance non-at-scene.
Combined column cored structure 1 in this example, be column structure, two ends are respectively link, and length is 2-5 rice, and post footpath is 10-80 millimeter, and concrete post footpath is determined according to wall rock condition, based on the shape in tunnel, substantially determine that the length of combined column cored structure is 2-5 rice.Adopt steel pipe sleeve connection between adjacent two sections of combined column cored structures, conveniently steel pipe entangles combined column cored structure, and the link of the link combined column cored structure of combined column cored structure arranges the step inwardly inside contracted, and connects for steel pipe socket jacket casing.
Based on the series connection of above-mentioned combined column cored structure, adopt the technical scheme that steel pipe socket jacket casing connects, in order to improve the stability of connection, inventor develops again new technical scheme, upper have on the basis of scheme strengthen connection.Be specially, the sidewall of step has the first screwed hole, and the sidewall of steel pipe sleeve, having the second screwed hole with the first superimposed position of screwed hole, is bolted to connection between combined column cored structure and steel pipe sleeve.
Inventor also developed the bolted mode of a kind of replacement, i.e. anchoring link, be specially, the sidewall of step has the first anchor hole, the sidewall of steel pipe sleeve, having the second anchor hole with the first superimposed position of anchor hole, is fixedly connected with by crab-bolt between combined column cored structure and steel pipe sleeve.
The present invention not only have employed mode prefabricated in advance, and also large based on original reinforcing bar weight, steel using amount is large, therefore, inventors performed new improvement, forms new progressive technical scheme.Replace original reinforcing bar by combined column cored structure, combined column cored structure is built by the mixture of quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water.Its Raw adding proportion is, calculate by quality ratio, 425R Portland cement: quartz sand: SILICA FUME: slag powders: steel fibre: water reducing agent, 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.That is, combined column cored structure 1 is RPC RPC material, this material possesses the new material of superhigh intensity, high tenacity, high-durability, good volume stability, the New Building Materials that a kind of mechanical property, durability are all very superior, prefabricated outside tunnel, improve curing condition, improve construction quality.The compressive strength of RPC (RPC) can reach more than 160MPa, and its density is only 2400 ~ 2500kg/m
3, and the compressive strength 300MPa of HPB300 steel, but density is 7850kg/m
3.The intensity of steel is 2 times of RPC, but its density is 3 times of RPC, visible, and under equality strength condition, the inner prop of RPC combined column cored structure series connection is lighter than reinforcing bar.
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 combined column cored structure is described:
Step 101, prepares raw material;
Raw material comprises: quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and RPC special additive, water; The adding proportion of raw material is: calculate by quality ratio, 425R ordinary concrete: quartz sand: SILICA FUME: slag powders: steel fibre: water reducing agent, 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 reducing agent is methylene dimethyl sodium dinaphthalenesulfonate polymer.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, inventor has carried out careful research to mix process:
First quartz sand, steel fibre 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 reducing agent, stir 4 minutes (3.5-5 minute), obtain mixing and stirring material.
It should be noted that, accurately control water supply volume, add water after not allowing RPC mix to go out mixer; The mixing time that head mixes 4 minutes can not be very few, otherwise steel fibre just can not be uniformly dispersed completely, and after adding the powders such as cement, steel fibre can be united; RPC mixes and stirs and expects that freezing 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 conveyer 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 compactness, must choose reasonable Vibration Technology.It is consistent with vibrated 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 energy loss, and reduce noise, time of vibration controls at 2 ~ 4min.
Enter the mix after mould at vibration limit, vibrated bed top trowel Troweling press finishing, reach the planeness of standard-required, do not expose steel fibre, do not leak outside around template and mix and stir material, there are burr around combined column cored structure after will avoiding form removal like this, affect overall appearance, also can save and a large amount of manually go to polish it.
The freezing 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 room temperature and controls at 40 ± 5 DEG C, relative humidity >=70%.Just support by intensification, constant temperature, the maintenance of cooling three phases, programming 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 combined column cored structure.
Just support form removal after terminating, during form removal, the difference of component surface temperature and environment temperature should not more than 15 DEG C.
First plastic sheeting is removed during form removal, from shaper, pour out RPC combined column cored structure goods.Must not overexert during form removal and damage the outward appearance of combined column cored structure, reduce the infringement to template, will put down gently when combined column cored structure is put, early strength is inadequate, prevents fracture, forbids to beat, combined column cored structure and template to be piled up neatly respectively during form removal, be convenient to transport.
RPC combined column cored structure 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, programming 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 environment temperature should more than 15 DEG C.
During RPC combined column cored structure 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 vapor 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 condensed water 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 plastic sheeting and wrapped up, or take other measures to cover iron component surface, with anti-pollution RPC product surface, outside the flitch of piling, should plastic sheeting be wrapped up.Periodic cleaning fog room, clean in holding chamber, in case RPC goods are contaminated.Fog room should be able to control interior temperature exactly, can control intensification cooling rate exactly.
Above step forms the preparation method of complete set, and based on this preparation method, inventor 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 moulding by 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.
Based on above-mentioned prefabricated combined column cored structure, form the interior rod structure of new tunnel lining, comprise many inner props with matrix arrangement, every root inner prop, as shown in Figure 1, comprise multiple combined column cored structure 3 and multiple sleeve 5, be in series by multiple combined column cored structure 3, two links of combined column cored structure 3 arrange the step 4 inwardly inside contracted, and connect for steel pipe socket jacket casing.Adjacent two combined column cored structures 3 are socketed by steel pipe sleeve 5; Steel pipe socket jacket casing in combined column cored structure link and be fixedly connected with link by fixture.
Further limit above-mentioned interior rod structure, the wall thickness of steel pipe sleeve is 5-50 millimeter, and length is 100-300 millimeter.
Further limit above-mentioned interior rod structure, combined column cored structure is built by the mixture of quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water.
Utilize above-mentioned interior rod structure, preparation tunnel lining, as shown in Figure 2, it comprises interior rod structure and the concrete structure 2 of tunnel lining, wherein concrete structure 2 is ordinary concrete (such as R425 concrete) structure, concrete structure 2 wraps up every root inner prop 1 of interior rod structure, and every root inner prop is connected by multiple combined column cored structure, by steel pipe sleeve connection between adjacent combined column cored structure.
That is, specific operation process is, multiple inner prop of being connected out by combined column cored structure, and erect in tunnel, according to matrix distribution, the distance controlling in adjacent two post footpaths is between 40-60 millimeter, specifically can the size in reference column footpath determine, object reaches stronger inner support power.Then installation form, template frame, around inner prop, builds ordinary concrete in template, forms concrete structure, and then forms tunnel lining.
In general:
Compared with common reinforced concrete structure, under equality strength requires, high performance concrete (and RPC) is lightweight with ordinary concrete composite construction, dead load load can be effectively reduced, thus reduce Large Span Underground engineering lining cutting layer thickness, save reinforcing bar and concrete material, reduce construction costs.And convenient transportation, easy for installation.
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 lining combined column cored structure, is characterized in that, be column structure, two ends are respectively link, and length is 2-5 rice, and post footpath is 10-80 millimeter, and the link of described combined column cored structure arranges the step inwardly inside contracted, and connects for steel pipe socket jacket casing.
2. tunnel lining combined column cored structure as claimed in claim 1, is characterized in that,
The sidewall of described step has the first screwed hole, and the sidewall of described steel pipe sleeve is having the second screwed hole with the described first superimposed position of screwed hole; Or
The sidewall of described step has the first anchor hole, and the sidewall of described steel pipe sleeve is having the second anchor hole with the first superimposed position of anchor hole.
3. tunnel lining combined column cored structure as claimed in claim 1 or 2, is characterized in that,
Described combined column cored structure is built by the mixture of quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water; Mixed proportion is: in mass, 425R Portland cement: quartz sand: SILICA FUME: slag powders: steel fibre: water reducing agent, 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.
4. the interior rod structure of a tunnel lining, it is characterized in that, comprise the inner prop of many matrix arrangements, inner prop described in every root is connected in series by the combined column cored structure described in many any one of claim 1-3 and forms, and adjacent two described combined column cored structures are connect by steel pipe socket jacket casing; Steel pipe socket jacket casing in described combined column cored structure link and be fixedly connected with link by fixture.
5. a tunnel lining, is characterized in that, comprises interior rod structure and the concrete structure of tunnel lining according to claim 4, every root inner prop of the described interior rod structure of described concrete structure parcel.
6. a tunnel lining preparation method for combined column cored structure described in any one of claim 1-3, is characterized in that, comprising:
Step 1, prepare raw material, described raw material comprises: quartz sand, steel fibre, 425R Portland cement, SILICA FUME, slag powders and water reducing agent, water; The adding proportion of described raw material is: calculate by quality ratio, 425R Portland cement: quartz sand: SILICA FUME: slag powders: steel fibre: water reducing agent, 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 combined column cored structure.
7. the preparation method of combined column cored structure as claimed in claim 6, it is characterized in that, described step 2 comprises:
Quartz sand, steel fibre are carried out mix and obtain the first mixture, and duration of mixing is no less than 4 minutes;
425R 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 reducing agent 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 combined column cored structure as claimed in claim 6, 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 vibrated bed, and Troweling press finishing mould top edge 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 combined column cored structure 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 combined column cored structure as claimed in claim 9, is characterized in that,
The temperature of just supporting in step 4 is 40 ± 5 DEG C, relative humidity >=70%, and programming 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 80 ± 5 DEG C, and supporting the time is eventually 45-50 hour, and programming rate is less than 12 DEG C/h, and cooling rate is less than 15 DEG C/h.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106236A (en) * | 1985-09-02 | 1987-08-05 | 清水建设株式会社 | The steel pipe column of band inserts |
| CN201649346U (en) * | 2010-04-21 | 2010-11-24 | 丰润建筑安装股份有限公司 | Quakeproof concrete filling pipe |
| JP2011038313A (en) * | 2009-08-11 | 2011-02-24 | Chugoku Electric Power Co Inc:The | Composite column |
| CN102051964A (en) * | 2010-10-27 | 2011-05-11 | 管乃彦 | Composite sleeve type steel bar connecting device |
| CN202300435U (en) * | 2011-11-07 | 2012-07-04 | 江苏建筑职业技术学院 | Telescopic joint of steel pipe concrete support |
| CN103381621A (en) * | 2012-05-04 | 2013-11-06 | 中铁九局集团有限公司桥梁分公司 | Production process for active powder concrete product |
| CN104074533A (en) * | 2013-03-31 | 2014-10-01 | 付志亮 | Steel tube concrete support connecting structure and connecting construction method thereof |
| CN204532369U (en) * | 2015-04-28 | 2015-08-05 | 中铁工程设计咨询集团有限公司 | Tunnel lining combined column cored structure |
-
2015
- 2015-04-28 CN CN201510206277.4A patent/CN104790976B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106236A (en) * | 1985-09-02 | 1987-08-05 | 清水建设株式会社 | The steel pipe column of band inserts |
| JP2011038313A (en) * | 2009-08-11 | 2011-02-24 | Chugoku Electric Power Co Inc:The | Composite column |
| CN201649346U (en) * | 2010-04-21 | 2010-11-24 | 丰润建筑安装股份有限公司 | Quakeproof concrete filling pipe |
| CN102051964A (en) * | 2010-10-27 | 2011-05-11 | 管乃彦 | Composite sleeve type steel bar connecting device |
| CN202300435U (en) * | 2011-11-07 | 2012-07-04 | 江苏建筑职业技术学院 | Telescopic joint of steel pipe concrete support |
| CN103381621A (en) * | 2012-05-04 | 2013-11-06 | 中铁九局集团有限公司桥梁分公司 | Production process for active powder concrete product |
| CN104074533A (en) * | 2013-03-31 | 2014-10-01 | 付志亮 | Steel tube concrete support connecting structure and connecting construction method thereof |
| CN204532369U (en) * | 2015-04-28 | 2015-08-05 | 中铁工程设计咨询集团有限公司 | Tunnel lining combined column cored structure |
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| CN104790976B (en) | 2017-03-01 |
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