CN204532369U - Tunnel lining combined column cored structure - Google Patents
Tunnel lining combined column cored structure Download PDFInfo
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- CN204532369U CN204532369U CN201520263078.2U CN201520263078U CN204532369U CN 204532369 U CN204532369 U CN 204532369U CN 201520263078 U CN201520263078 U CN 201520263078U CN 204532369 U CN204532369 U CN 204532369U
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- combined column
- cored structure
- column cored
- tunnel lining
- steel pipe
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Abstract
The utility model relates to underground construction technical field, is specifically related to tunnel lining combined column cored structure.This combined column cored structure is column structure, and 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.Combined column cored structure serial connection forms inner prop.Rod structure in multiple inner prop matrix arrangement is formed.Concreting around the inner prop of interior rod structure, overall formation tunnel lining.Shaping by mode oscillation of preparing burden, mix and stir, enter, first foster, whole supporting obtains combined column cored structure.Previously prepared combined column cored structure outside hole, combined column cored structure adopts RPC structure, light weight, intensity is large, and good installation, the concrete of RPC and cast in situs forms composite construction, can bear the load of country rock load and structure self.
Description
Technical field
The utility model relates to underground construction technical field, relates to tunnel lining combined column cored structure, is specifically related to tunnel lining and interior rod structure, 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.
Utility model content
Embodiment of the present utility model provides a kind of tunnel lining and interior rod structure, 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 utility model, 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 utility model additionally provides a kind of interior rod structure of tunnel lining, it comprises the inner prop of many matrix arrangements, 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 utility model 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.
The preparation method of the tunnel lining provided by embodiment of the present utility model 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 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.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment 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 embodiments more of the present utility model 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 the utility model embodiment;
Fig. 2 is tunnel lining sectional schematic diagram in the utility model embodiment.
Detailed description of the invention
Carry out clear complete description below with reference to the technical scheme of accompanying drawing to each embodiment of the utility model, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiment.Based on the embodiment in the utility model, 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 utility model is protected.
Considering that current tunnel Large Span Underground engineering lining cutting layer thickeies causes steel concrete consumption large, and stressed irrational problem, present embodiments provide a kind of tunnel lining and interior rod structure, combined column cored structure.
A kind of tunnel lining combined column cored structure, it is column structure, and two ends are respectively link, and length is 2-5 rice, and post footpath is 10-80 millimeter, and the link of 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 every root inner prop is connected in series by many above-mentioned combined column cored structures and forms, and adjacent two combined column cored structures are connect by steel pipe socket jacket casing; Steel pipe socket jacket casing in 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 rod structure in 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 utility model 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.
The various embodiments that the utility model provides can combine as required in any way mutually, the technical scheme obtained by this combination, also in scope of the present utility model.
Obviously, when not departing from spirit and scope of the present utility model, those skilled in the art can carry out various change and modification to the utility model.If to change of the present utility model these and modification is within the scope of claim of the present utility model and equivalent thereof, then the utility model also will comprise these and change and modification.
Claims (6)
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, it 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.
3. tunnel lining combined column cored structure as claimed in claim 1, it is characterized in that, 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.
4. the combined column cored structure of the tunnel lining as described in any one of claim 1-3, 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.
5. 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 1-4 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.
6. a tunnel lining, is characterized in that, comprises interior rod structure and the concrete structure of tunnel lining according to claim 5, every root inner prop of the described interior rod structure of described concrete structure parcel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520263078.2U CN204532369U (en) | 2015-04-28 | 2015-04-28 | Tunnel lining combined column cored structure |
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| CN201520263078.2U CN204532369U (en) | 2015-04-28 | 2015-04-28 | Tunnel lining combined column cored structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790976A (en) * | 2015-04-28 | 2015-07-22 | 中铁工程设计咨询集团有限公司 | Composite column core structure for tunnel lining and manufacturing method of composite column core structure |
| CN105114105A (en) * | 2015-09-18 | 2015-12-02 | 南京联众建设工程技术有限公司 | Steel-concrete composite tunnel lining supporting structure and manufacturing and construction method thereof |
-
2015
- 2015-04-28 CN CN201520263078.2U patent/CN204532369U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790976A (en) * | 2015-04-28 | 2015-07-22 | 中铁工程设计咨询集团有限公司 | Composite column core structure for tunnel lining and manufacturing method of composite column core structure |
| CN105114105A (en) * | 2015-09-18 | 2015-12-02 | 南京联众建设工程技术有限公司 | Steel-concrete composite tunnel lining supporting structure and manufacturing and construction method thereof |
| CN105114105B (en) * | 2015-09-18 | 2016-06-29 | 南京联众建设工程技术有限公司 | Steel-concrete combined type tunnel-liner support structure and making thereof and construction method |
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Granted publication date: 20150805 Effective date of abandoning: 20171114 |
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