CN205077522U - Compound well lid of ultra high performance concrete honeycomb - Google Patents
Compound well lid of ultra high performance concrete honeycomb Download PDFInfo
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- CN205077522U CN205077522U CN201520716063.7U CN201520716063U CN205077522U CN 205077522 U CN205077522 U CN 205077522U CN 201520716063 U CN201520716063 U CN 201520716063U CN 205077522 U CN205077522 U CN 205077522U
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Abstract
The utility model discloses a compound well lid of ultra high performance concrete honeycomb, this well lid is formed with concrete round platform complex by the ultra high performance concrete honeycomb of reinforcing bar reinforcing. Ultra high performance concrete honeycomb comprises the recessed honeycomb of marginal round platform ring sum, and ultra high performance concrete steely fibre, polymer fibre or mineral fiber increase toughly to configuration reinforcing steel bar skeleton. The utility model discloses the mechanics of make full use of ultra high performance concrete, reinforcing bar and concrete material and durability characteristic, the well lid of the design and production of learning from other's strong points to offset one's weaknesses has effectively reduced the quantity of expensive material ultra high performance concrete and reinforcing bar, and the concrete receives toughness ultra high performance concrete parcel protection, and mechanical properties can reach the level of nodular cast iron well lid, and performances such as durability, theftproof and cling compound then are superior to can obtain better society and economic benefits by cast iron class manhole cover.
Description
Technical field
The utility model relates to a kind of well lid, the well lid of especially a kind of ultra-high performance concrete and concrete compound.
Background technology
Ultra-high performance concrete (UHPC) definition and development course
Ultra-high performance concrete (Ultra-HighPerformanceConcrete, be called for short UHPC), because generally need mixing of steel fiber or high-strength polymer fiber, also very-high performance fibre reinforced concrete (Ultra-HighPerformanceFibreReinforcedConcrete is called for short UHPFRC) is referred to as.UHPC is different from traditional high-strength concrete (HSC) and steel fibrous concrete (SFRC), neither the height strengthening of traditional sense " high performance concrete (HPC) ", but the new types of Cernent based structures engineering material that performance indications are clear and definite." a kind of ultra-high performance concrete-RPC " introduction UHPC that publish an article such as Tsing-Hua University professors Qin Weizu in 1999, still more use " RPC (being called for short RPC) " title in China so far.RPC is the proprietary name of a company of France, and publicity is introduced more and is widely known by the people.This kind of new material is called UHPC by French scholar DeLarrard in 1994 etc., because UHPC or UHPFRC title does not have business color, and better can express this cement-based material or concrete superior function, progressively be widely accepted and adopted.
The characteristic that the more representational definition of UHPC or needs possess is as follows: be the cement-base composite material that a kind of grating of composition material particle reaches best; Water-cement ratio is less than 0.25, the fine short Stainless-steel fibre material containing higher proportion; Compressive strength is not less than 150MPa; There is the toughness of tension state, still keep tensile strength to be not less than 5MPa(France after cracking and require 7MPa); Inside has non-intercommunicating pore structure, has the ability that very high opposing gas, liquid immerse, and compare with high performance concrete (HPC) with conventional concrete, durability can increase substantially.
UHPC belongs to modern advanced material, innovate the composite mode of cement-based material (concrete or mortar) and fiber, steel (reinforcing bar or high strength wire), increase substantially fiber and the intensity utilization ratio of reinforcing bar in concrete, made all round properties of cement based structural meterials there occurs great-leap-forward progress.Use UHPC can build the structure of high-strength light and high tenacity, thoroughly change concrete structure " fat beams and columns " state; The durability that its structure has and working life, surmount other all structural meterialss such as steel, aluminium, plastics far away.
UHPC last century late nineteen seventies originate from Denmark, eight, the nineties compares the deep research of system in Europe, and start to apply on minor works and goods.Enter this century, all UHPC is carried out research and development as novel, following or strategic engineering material in many countries such as America and Europe, Japan and Korea S, France and Japan take the lead in having formulated design guidelines.At present, the preparation of UHPC, production, construction and prefabricating technique have been tending towards ripe, structural performance and design specifications are in development and improve process, and the application of engineering structures and goods constantly makes further progress, and regularly hold international UHPC/UHPFRC seminar and carry out academic exchange.
The preparation of UHPC and enhancing, toughness reinforcing principle
Last century, some experimental studies of early seventies confirmed, improved the compactness of cement paste, effectively can improve intensity.The DSP(DensifiedSystemwithultra-fineParticles of Denmark scholar professor H.H.Bache development) theoretical, that is: be filled in cement granules with the ultra-fine grain (silicon ash) of fully dispersion to pile up in the space of system, realize particle packing densified.By the peptizaiton of high efficiency water reducing agent, it is the space that water is filled that silicon ash particle fills the space i.e. a large amount of script occupied between cement granules, thus significantly reducing the void content of solid particle accumulation and the water requirement of slurry, DSP system can make water-cement ratio be reduced to the ultra low levels of 0.10 ~ 0.20.Use high-strength aggregate, the compressive strength of DSP original concrete can reach 280MPa, but fragility is very large; Use Stainless-steel fibre toughness reinforcing (i.e. UHPC), compressive strength can reach the maintenance of 400MPa(normal temperature simultaneously).Further more afterwards, France uses the RPC (RPC) of high-pressure molding and HTHP (pressure is steamed) maintenance, and most high compressive strength reaches 800MPa.
The DSP matrix of high compact and the compactness at steel fibre interface also very high, interface binding intensity is greatly improved, and makes steel fibre in DSP matrix, improve tension, bending resistance, cracking resistance and toughening effect and is fully played.
With DSP theory preparation ultra high strength concrete, it is an important breakthrough of concrete technology.MDF cement (the MacroDefectFree that same time occurs, macroscopic view zero defect cement, with polymer-filled cement paste hole and crack), SIFCON(SlurryInfiltratedFibreConcrete, the concrete of pre-fill steel fibre cement injection fine sand slurry), also can obtain the very high strength of materials and toughness, but the former needs roll-in or extruded, the latter is difficult to make steel fibre form three-dimensional accumulation, application is subject to severely restricts, can only be used for so far making small articles.DSP theory realizes higher compactness, only needs select suitable high-quality raw material and carry out mixtures optimal design, does not need to use special process, by traditional mixing plant and vibratory compaction method, just can produce with shaping.Therefore, based on the UHPC of DSP theory preparation, the practical stage is entered quickly.
Nowadays, can prepare self-compaction UHPC, pre-manufactured product and cast in situs more convenient.Although the technological approaches of preparation UHPC presents variation with use material now, the basic principle followed does not become, and namely particle composition will make compactness maximize with match ratio.
The mechanical property of UHPC
Simple superelevation compressive strength, often along with " superelevation fragility ", is not meaned " very-high performance "." the superelevation mechanical property " of UHPC is more mainly reflected in superelevation tensile strength (uniaxial tension and bending and tensile strength) and high tenacity, and this dependence adds short fiber to realize.The straight smooth round steel fiber of early application diameter 0.15-0.4mm, length 6-12mm, the tensile strength of UHPC can be brought up to 30MPa, energy to failure reaches 1,500 ~ 40,000N/m(steel fibre volume content 2% ~ 12%), make UHPC stride into toughness, (energy to failure is more than 1,000J/m for the ranks of high-toughness material
2be divided into toughness material).Now, use abnormity, particularly reverse shape high-strength steel fiber, the tensile strength of UHPC, deformability, toughness or energy to failure can be improved further.In addition, polyvinyl alcohol (PVA) fiber of high-strength and high-modulus is also for the enhancing of UHPC and toughness reinforcing; Polyethylene (PP) fiber is for improving the refractory ability of UHPC.
The resistance to compression of UHPC and tensile strength significantly surmount other cement-based material.In deformability, UHPC can realize at relatively low fiber level " strain hardening " behavior that stretches, and namely many microcracks, appear in single shaft tension experience elastic stage, and fiber drawing-resistant function starts; Tensile stress rises subsequently, enters the stiff strain hardening stage (" surrenders " of similar steel); Reach the rear maximum tension stress (tensile strength) of cracking, occur that indivedual crack is in local expansion, tensile stress declines afterwards, enters softening stress-displacement stage." strain hardening " is the key character of toughness material, embody short fiber reinforced toughening efficiency " matter " change, only have ECC(high ductility cement-base composite material at present) and UHPC can realize " strain hardening ".Namely common and high-intensity fiber concrete (FRC, HSFRC) cracking softens, and fibre strength fails effectively to play, therefore improves the limited use of toughness.The UHPC that Stainless-steel fibre is toughness reinforcing, then the beam (CRC or HRUHPC beam) made with high tensile reinforcement or steel strand Application of composite, bending bearing capacity close to girder steel level and bending resistance behavior is similar, higher intensity/mass ratio and rigidity/mass ratio can be realized.In conjunction with prestressing technique, UHPC also has larger potentiality for building the structure of large span or high-strength light, high-ductility, has developed multiple bridge construction so far.
The durability of UHPC and sustainable development
Another performance of UHPC most attraction is potential superelevation durability.Theoretically with according to experimental study so far, substantially can determine: the problem that UHPC does not have Frozen-thawed cycled, alkali-aggregate reaction (AAR) and delayed ettringite formation (DEF) to destroy; In uncracked condition, the anti-carbonization of UHPC, resisting chloride ion penetration intrusion, resisting erosion of sulfate, resist chemical, the endurance quality index such as wear-resisting, compared with traditional high-strength high-performance concrete (HSC/HPC), have the raising of the order of magnitude or multiple.But the not resistance to nitric acid ammonia corrosion of UHPC, because steel fibre can very fast corrosion.
UHPC has extraordinary microcrack self-healing ability.Because water-cement ratio is very low, UHPC mixes and stirs the water yield only can supply part of cement aquation, and the inside of most cement granules is in does not have hydrated state.Therefore, water or steam enter the crack of UHPC, and the non-aquation part of cement granules being exposed to fracture faces " will continue " aquation; The hydrated product volume combining outside moisture is greater than cement and who knows volume, and additional volume can cram crack.Test and engineering verification show, the crack self-healing of UHPC can not only be closed microcrack and reduces permeability and keep good durability, also plays the effect of " cementing " crack simultaneously, recovers the mechanical property that concrete reduces because of crack to a certain extent.
In the endurance quality of UHPC, the corrosion of surperficial steel fibre attracts people's attention always.Steel fibre topping near surface is very little, also possibility exposing surface, and at moist or corrosive atmosphere (environment such as villaumite, acidity), surperficial steel fibre has the very fast danger that corrosion occurs.The test of current 10-15 and Practical Project are observed and are shown; as long as steel fibre is exposing surface not, the closely knit matrix of UHPC can effectively protect steel fibre not corrosion, and the corrosion of exposing surface steel fibre does not expand to inside; be only limitted to surface, but can surface aesthetic be affected.Therefore, for the UHPC structure having decoration functions, need to take measures to prevent steel fibre from exposing or using not corrosion fiber.
Compared with steel work, the advantage of UHPC structure is high-durability and does not almost have maintenance cost, and easily reaches building fire protection requirement.Compared with traditional reinforced concrete structure, UHPC structural life-time can significantly improve.According to theory analysis, existing exposure test and Practical Project assay, expection UHPC structural life-time, in corrosivity natural environment, (as marine environment) can more than more than 200 years; 1000 can be reached at non-corrosive environment (as urban architecture).Relatively conservative day this guide is thought, under normal environment for use condition, the design working life of UHPC structure is 100 years.Carbonization in durability, steel fibre and corrosion of steel bar, Frozen-thawed cycled, sulfate attack and alkali-aggregate reaction belong to inspection-free project, but heavily chemical attack and fire resistance are the projects needing inspection.
Use cementitious material CI bi(binderintensity) and concentration of carbon index ci(CO
2intensity) Eco-efficiency indicators of two cement applications is evaluated, and UHPC belongs to the concrete that peak efficiency uses cementitious material or cement, is also the concrete material of most low-carbon (LC) simultaneously.Compared by the calculating of concrete engineering structure, can material-saving, the energy-conservation and emission reduction effect of quantitative analysis UHPC.Such as, (material and the structure of two bridges are different to contrast the beam slab one road bridge of typical girder steel-reinforced concrete bridge deck plate composite construction road bridge and UHPC door type beam, length, width are identical with function), quantitative analysis shows: UHPC bridge material-saving volume is 24%, and material-saving weight is 35%; Energy-conservation 54%; Reduce and directly discharge CO
2with global warming potential GWP(equivalent CO
2discharge) reach 59% and 44% respectively.
The application of UHPC
Make a general survey of the research of UHPC in the world, development and apply, leading country differs from one another, brief introduction is as follows: the research of Denmark has novelty most, is more applied in now in wind-power tower connection, building structure lightly attractive in appearance, as balcony, stair, curtain wall, building heat preservation system etc.; The research scale of France is large, participation unit is many, the value of UHPC is shown to the world, lead the development in many-side application, as bridge, building structure and curtain wall, anatomical connectivity, Long Life Pavement etc., wherein the Ductal product of Lafarge is applied at world wide; The research of Germany is exhaustive from microcosmic to macroscopic view, comparatively fast for the production of manufacture multiple product, as drilled pile drill bit (substituting cast steel), lathe base, building vertical column etc.; The research of America & Canada is compared and is absorbed in bridge and relevant practical technique, has developed multiple UHPC highway bridge and bridge deck system, and UHPC has started to connect for bridge deck more and more and quick bridge construction or bridge maintenance; The research and apply of Switzerland is leading in concrete structure maintenance and reinforcement, is becoming a kind of best approach and obtain more application with UHPC maintenance and reinforcement highway bridge; UHPC treats as " 21 century engineering material " by Japan, carries out the practice of more comprehensive research and apply, achieves the application in the new maritime runway major works of Tokyo Haneda Airport; Korea S's investigation and application system in bridge is goed deep into, and within a short period of time forms more complete design and production construction and application technique file (standard criterion); The cable channel cover plate (RPC cover plate) of the application mainly high-speed railway of China; Etc..
The value of UHPC and potentiality
From birth to today, UHPC experienced by the development of 35 years.From initial Densit commercially produced product, there is the product line that RPC, BSI, Ductal, CEMTEC, BCV etc. are numerous in development.Nowadays, UHPC takes off Mysterious Veil, is developing into the engineering material of new generation of easily preparation production and practical application.UHPC application study is in the ascendant, beam is so far pulled in the application such as rod structure, thin-walled thin shell structures, maintenance and reinforcement, function or decoration element, demonstrate firm, durable, attractive in appearance, the superiority such as material-saving, low-carbon (LC), low maintenance cost, revolutionize the looks of concrete structure or steel work.Value and the potentiality of UHPC are embodied in: superhigh intensity and toughness, impossible or Novel light high-strength structure before can building; The structural timber of durability significantly beyond tradition, makes UHPC structure have overlength working life and low-maintenance maintenance cost, obtains the life cycle cost (LCC, LifeCycleCost) lower than traditional structure; Give full play to the performance advantage of UHPC, in some applications, likely reduce the comprehensive construction cost of structure or engineering; The structure that application UHPC builds, has significant material-saving, energy-conservation and emission reduction effect, is conducive to sustainable development.
Research application so far shows, UHPC substitutes cast steel, cast iron and stainless steel and manufactures high-strength, corrosion resistant product or structure, is one of application that effectively can utilize UHPC performance and fully demonstrate UHPC value.
The implementation of prior art
Manhole cover is made up of well lid and well seat, and on road, use frequently can be subject to motor vehicles and rolls and impact, and therefore manhole cover needs higher structural strength and shock resistance; Manhole cover damage or loss, can serious harm pedestrian, non-maneuver and motor vehicles safety, therefore need well lid durable and antitheft.In addition, well lid needs very stably to be placed on well seat, prevents people, garage produces when walking on well lid and beat and noise.
Manhole cover is divided into manhole (people will enter) and non-manhole (nobody enters) two kinds by specification.Inhuman hole specification does not specify, manhole specification is pressed the clean perforate (CO, ClearOpening) of well seat and is divided into 600mm, 700mm, 800mm and 900mm tetra-class, and wherein the most frequently used manhole cover is CO=600mm.In addition, standard has also made regulation to the gradient, well seat supports face width degree etc. of well lid insert depth and lateral margin, well lid design demand fulfillment corresponding requirements.Well lid shape mostly is circular most, and what other use was more is square and rectangle.
The material that current making manhole cover uses is mainly cast iron (ductile iron and grey cast-iron), steel fibrous concrete and polymer matrix composite.Also have consideration or invention UHPC to make well lid, the patent found as follows (these patents all use " RPC " i.e. RPC title):
CN2755183 " manhole lid with concrete active powder ": this well lid is formed by being provided with integrally formed fish-bellied type ball-crown body between position, the center of circle and round platform Outer annular strip bottom the endless belt of round platform, round platform outer, round platform, the fish-bellied type ball-crown body being positioned at position, the center of circle bottom round platform is the maximum gauge of well lid, and does the setting of thickness-tapered shape gradually to endless belt, round platform outer with curved; Individual layer steel mesh reinforcement skeleton is provided with in the fish-bellied type ball-crown body of well lid.
CN202672190U " a kind of manhole cover " (utility model, effectively): well lid comprises steel limit, stirrup, RPC structure.It is characterized in that: intersect in cylinder steel limit and be provided with stirrup; RPC structure is filled with in the housing of steel limit.
CN203034488U " a kind of well lid " (utility model, effectively): this well lid is tabular, be made up of RPC, for alleviating the weight of described well lid and guaranteed strength, being provided with fin in its bottom surface, being also provided with through hole, be beneficial to open, while guarantee well lid intensity, significantly can save material, there is lightly slim design feature.
Above-mentioned three utility model patents are all considered and utilize UHPC(RPC) intensity, but all identical in mentality of designing or in the theory of materials'use with the utility model, the manhole cover structure therefore obtained is completely not different.The utility model is by analyzing the worst Static and dynamic loaded state of well lid, by the thinking giving full play to most UHPC and reinforced steel bar strength, as far as possible minimizing UHPC and bar material consumption, devise unique manhole cover structure, all different from the manhole cover structure of existing all materials.The well lid of ultra-high performance concrete of the present utility model (UHPC) honeycomb structure and concrete compound is not target with lightweight, but relies on well lid weight to realize the stability of well lid arrangement, but considers the cost of manufacture reducing well lid as far as possible.
The manhole cover used the earliest, adopts timber to make well lid, due to timber measurement poor stability (wet rise drying shrinkage amplitude large) and supporting capacity is low, the life-span is short, does not re-use now.Traditional manhole cover is cast iron quality, comprises grey cast-iron and ductile iron.Grey cast-iron intensity is lower, fragility is comparatively large, and the manhole cover of making is heavier, and use amount is reducing gradually.Ductile iron intensity and toughness are all higher, can produce the manhole cover that mechanical property is best, are used to the manhole cover of most of C250 and D400 grade.The subject matter that cast iron class manhole cover faces is lost, and therefore usually cause severe traffic accidents.Although take many kinds of measures antitheft now, as mounting shaft cover antitheft lock, door chain, antitheft hinge or concealed type well lid etc., all fundamentally cannot stop casting iron well lid and lose problem.
Another method avoiding well lid stolen be use recovery value little material---steel fibrous concrete and polymer matrix composite are to make well lid.Although can be effectively antitheft, the manhole cover that this two classes material makes, the shortcoming in performance also clearly.Steel fibrous concrete (SFRC) although Toughness Ratio ordinary concrete increases, but still is unable to undergo collision, impacts, and corner is easily damaged; Also have SFRC well lid to arrange stirrup at edge to protect corner, but stirrup is very easy to corrosion, the same deterioration of well lid is very fast.Polymers or polymer matrix composites, particularly glass fiber reinforced plastic (galss fiber reinforced resin) class material, can reach very high tension, flexural strength, produce lighter manhole cover, but weather-proof or loss of properties on aging, supporting capacity decays with the aging of polymer or resin.Owing to there is these shortcomings, this two classes material is only limitted to the manhole cover making C250 and following grade.
Utility model content
The purpose of this utility model is to provide a kind of ultra-high performance concrete honeycomb structure combined manhole cover, and this well lid is not target with lightweight, but relies on well lid weight to realize the stability of well lid arrangement, but considers the cost of manufacture reducing well lid as far as possible.
The technical solution of the utility model is: a kind of ultra-high performance concrete honeycomb structure combined manhole cover, this well lid is composited by ultra-high performance concrete honeycomb structure and concrete round platform part, and concrete round platform part and ultra-high performance concrete honeycomb structure are built shaping (shaping at twice) respectively.
Ultra-high performance concrete honeycomb structure is made up of edge ring body and recessed honeycomb ceramics, and ultra-high performance concrete containing steel fibre, polymer fiber or mineral fibers activeness and quietness, and configures reinforcing steel bar skeleton.
Concrete round platform part is chimeric to be filled in ultra-high performance concrete honeycomb structure, and upper surface and ultra-high performance concrete honeycomb structure outer rim ring body top surface being parallel form well lid top surface plane, and soffit flushes with recessed honeycomb ceramics bottom surface.
Ultra-high performance concrete honeycomb structure, its edge ring body is circular, oval, square or rectangle.
Ultra-high performance concrete honeycomb structure, its recessed honeycomb ceramics is made up of orthogonal girder, or is made up of center outward direction girder and ring-like girder.
Ultra-high performance concrete honeycomb structure, the girder of its recessed honeycomb ceramics is that broken line is recessed or curve is recessed.
The utility model has the advantage of: the UHPC honeycomb structure combined manhole cover of design, UHPC material tension, breaking resistance, toughness and durability, Steel Bar Tensile Strength and concrete compressive strength can be effectively played and make full use of, learn from other's strong points to offset one's weaknesses, thus obtain reasonable, that all round properties is excellent well lid.This combined manhole cover solves the problem such as breakage, durability well, and all round properties is significantly better than steel fibrous concrete and polymer-base composite material cover for inspection manhole.Compared with castiron well cover, manufacture UHPC honeycomb structure combined manhole cover, effectively can reduce the life cycle cost of CO2 emission, energy consumption and well lid, social benefit is remarkable.UHPC honeycomb structure combined manhole cover of the present utility model, mechanical property (supporting capacity/weight ratio and toughness) can reach the level of ductile iron manhole cover, and standard is to the requirement of C250, D400 and E600 grade, the characteristics such as durability, antitheft, antiskid are then better than castiron well cover comprehensively, expection is the manhole cover of all round properties the best, wide market.
Accompanying drawing explanation
Fig. 1 is the overlooking of a kind of ultra-high performance concrete honeycomb structure of the utility model combined manhole cover, look up and generalized section is looked on the right side, wherein: edge ring body is circular, and recessed honeycomb ceramics is made up of orthogonal girder, and girder is that broken line is recessed;
Fig. 2 be a kind of ultra-high performance concrete honeycomb structure of the utility model combined manhole cover concrete round platform partial top, to look up and generalized section is looked on the right side, the ultra-high performance concrete honeycomb structure edge ring body of its correspondence is circular, recessed honeycomb ceramics is made up of orthogonal girder, and girder is that broken line is recessed;
Fig. 3 is that the ultra-high performance concrete honeycomb structure of a kind of ultra-high performance concrete honeycomb structure of the utility model combined manhole cover is overlooked, to be looked up and generalized section is looked on the right side, wherein: ultra-high performance concrete honeycomb structure edge ring body is circular, recessed honeycomb ceramics is made up of orthogonal girder, and girder is that broken line is recessed;
Fig. 4 is that a kind of ultra-high performance concrete honeycomb structure of the utility model combined manhole cover is overlooked, to be looked up and generalized section is looked on the right side, wherein ultra-high performance concrete honeycomb structure edge ring body is circular, recessed honeycomb ceramics is made up of center outward direction and annular girder, and girder is that curve is recessed;
Fig. 5 is structural representation of the present utility model.
In figure: 1-concrete round platform part, the groove (corresponding to the girder of chimeric recessed honeycomb ceramics mutually) of 11-concrete round platform part; 2-ultra-high performance concrete honeycomb structure, 21-edge round platform ring, the recessed honeycomb ceramics that 22-is made up of orthogonal, the recessed girder of broken line, the recessed honeycomb ceramics that 23-is made up of center outward direction and annular, the recessed girder of curve; 3-cage of reinforcement.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The following example considers the material used: the toughness reinforcing ultra-high performance concrete of Stainless-steel fibre (UHPC), and uniaxial tension test is in 20 ~ 30MPa scope; Reinforcing bar strengthens the bending and tensile strength of UHPC girder in 150 ~ 300MPa scope; Concrete is C60 strength grade.
Embodiment 1
Round manhole cover shown in the present embodiment corresponding diagram 1, edge round platform ring 21 size and the matching used well seat of UHPC honeycomb structure 2 coincide, and recessed honeycomb ceramics 22 is made up of orthogonal, that broken line is recessed girder.
Well lid makes first shaping concrete circular platform part 1, the i.e. concrete round platform part of the shaping Fig. 2 of analogue formation: this round platform part is made up of upper round platform and lower inverted trapezoidal round platform, has orthogonal, the recessed girder of broken line of the chimeric recessed honeycomb ceramics 22 of the groove 11 of the concrete round platform part of square or rectangle correspondence below inverted trapezoidal round platform.Concrete round platform part 1 is through normal temperature wet curing or stream curing, and concrete crushing strength reaches the demoulding after 30MPa, completes concrete round platform part 1 prefabricated.
Steel bar meter, shearing, bending, form cage of reinforcement 3 by welding shown in Fig. 3.
The UHPC honeycomb structure 2 of the shaping Fig. 3 of analogue formation: install first prefabricated concrete round platform part and cage of reinforcement in a model, build UHPC mix, guarantee closely knit.
After UHPC is shaping, normal temperature moisture-keeping maintaining is to reaching UHPC demoulding strength (about 30MPa), and the demoulding, then 80 ~ 100
othermal curing about 48 hours in C steam or water, cooling, obtains combined manhole cover finished product.
Embodiment 2
Round manhole cover shown in the present embodiment corresponding diagram 4, edge round platform ring 21 size and the matching used well seat of UHPC honeycomb structure 2 coincide, recessed honeycomb ceramics 23 by circular with center outward direction, the recessed girder of curve forms.
Steel bar meter, shearing, bending, form cage of reinforcement by welding shown in Fig. 4.
Well lid makes the UHPC honeycomb structure 2 of the shaping Fig. 4 of first analogue formation.After shaping, normal temperature moisture-keeping maintaining is to reaching demoulding strength (30MPa), and the demoulding, then 80 ~ 100
oin C steam or water, thermal curing about 48 hours, completes the prefabricated of UHPC honeycomb structure 2.
Then formation of concrete round platform part 1: the model being combined into shaping Fig. 4 concrete round platform part 1 with external model and UHPC honeycomb structure, concreting mix, vibration compacting.
After concrete round platform part 1 is shaping, reach 30MPa through normal temperature wet curing to concrete crushing strength, or after stream curing, the demoulding, concrete arrives 60MPa, obtains combined manhole cover finished product.
Claims (6)
1. a ultra-high performance concrete honeycomb structure combined manhole cover, it is characterized in that: the ultra-high performance concrete honeycomb structure (2) that this well lid is strengthened by cage of reinforcement (3) and concrete round platform part (1) are composited, concrete round platform part (1) and ultra-high performance concrete honeycomb structure (2) are built shaping respectively.
2. ultra-high performance concrete honeycomb structure combined manhole cover according to claim 1, it is characterized in that: ultra-high performance concrete honeycomb structure (2) is made up of edge round platform ring (21) and recessed honeycomb ceramics (22), ultra-high performance concrete containing steel fibre, polymer fiber or mineral fibers activeness and quietness, and configures reinforcing steel bar skeleton (3).
3. ultra-high performance concrete honeycomb structure combined manhole cover according to claim 1, it is characterized in that: concrete round platform part (1) is chimeric to be filled in ultra-high performance concrete honeycomb structure (2), upper surface and edge round platform ring (21) top surface being parallel form well lid top surface plane, and soffit flushes with recessed honeycomb ceramics (22) bottom surface.
4. ultra-high performance concrete honeycomb structure combined manhole cover according to claim 2, is characterized in that: ultra-high performance concrete honeycomb structure (2), its edge round platform ring (21) is circular, oval, square or rectangle.
5. ultra-high performance concrete honeycomb structure combined manhole cover according to claim 2, it is characterized in that: ultra-high performance concrete honeycomb structure (2), its recessed honeycomb ceramics (22,23) is made up of orthogonal girder, or is made up of center outward direction girder and ring-like girder.
6. ultra-high performance concrete honeycomb structure combined manhole cover according to claim 2, is characterized in that: ultra-high performance concrete honeycomb structure (2), the girder of its recessed honeycomb ceramics (22,23) is that broken line is recessed or curve is recessed.
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| CN105563614A (en) * | 2016-03-15 | 2016-05-11 | 苏州市兴邦化学建材有限公司 | Production process of surface-bright profile steel fiber concrete inspection well cover |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105563614A (en) * | 2016-03-15 | 2016-05-11 | 苏州市兴邦化学建材有限公司 | Production process of surface-bright profile steel fiber concrete inspection well cover |
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