CN110485276A - A kind of combined anti-seismic pier stud and its without templating construction method - Google Patents

A kind of combined anti-seismic pier stud and its without templating construction method Download PDF

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Publication number
CN110485276A
CN110485276A CN201910753901.0A CN201910753901A CN110485276A CN 110485276 A CN110485276 A CN 110485276A CN 201910753901 A CN201910753901 A CN 201910753901A CN 110485276 A CN110485276 A CN 110485276A
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CN
China
Prior art keywords
pier
pier stud
pier shaft
concrete
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910753901.0A
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Chinese (zh)
Inventor
姜海龙
毕玉峰
吴佳杰
王凯
徐润
张文武
刘鹏
王珊珊
王飞
荣锐
徐斌
曹贤明
韩海龙
龚强
于潇舸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University
Shandong High Speed Group Co Ltd
Shandong Provincial Transportation Planning and Design Institute Co Ltd
Original Assignee
Qilu Transportation Development Group Co Ltd
Shandong University
Shandong Provincial Transportation Planning and Design Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Qilu Transportation Development Group Co Ltd, Shandong University, Shandong Provincial Transportation Planning and Design Institute Co Ltd filed Critical Qilu Transportation Development Group Co Ltd
Priority to CN201910753901.0A priority Critical patent/CN110485276A/en
Publication of CN110485276A publication Critical patent/CN110485276A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/2038Resistance against physical degradation
    • C04B2111/2046Shock-absorbing materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a kind of combined anti-seismic pier stud and its without templating construction method, combined anti-seismic pier stud, comprising: pier stud pedestal provides support force for compound pier stud;Compound pier stud is fixed on the top of pier stud pedestal, including outsourcing sleeve and pier shaft, and pier shaft is placed on the inside of outsourcing sleeve, and the outsourcing sleeve is prepared by superhigh tenacity concrete, and the pier shaft is poured by slightly expanded concrete.The compound pillarwork has preferable anti-cracking ability and antidetonation energy absorption ability.

Description

A kind of combined anti-seismic pier stud and its without templating construction method
Technical field
The invention belongs to technical field of bridge engineering, and in particular to a kind of combined anti-seismic pier stud and its construct without templating Method.
Background technique
Disclosing the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without certainty It is considered as recognizing or implying in any form that information composition has become existing skill well known to persons skilled in the art Art.
Currently, bridge pier column is mainly built up by normal concrete and reinforcing bar.Under seismic loading, bridge pier column is dived It is located at the bottom and top of pier shaft in plastic hinge region.Engineering practice shows merely to improve concrete strength or increases arrangement of reinforcement Improve the anti-seismic performance of bridge pier column, effect is limited.This is because, on the one hand, the anti-seismic performance of concrete and its Toughness is related, and the compression strength of concrete can be no doubt improved by preferred aggregate, incorporation additive and active blend, but still The brittleness speciality of concrete material is not changed.Under seismic loading, the normal concrete of bridge pier column tensile region is easy Brittle cracking occurs to destroy, and crack negligible amounts, cannot effectively absorb seismic energy.On the other hand, overstocked stirrup, complexity Mushroom forest, the pouring molding quality of concrete when also will affect site operation.
Superhigh tenacity concrete (ECC) has received building work since the 1990s is proposed by Victor professor Li The highest attention of Cheng Hangye.It is with excellent tensile mechanical performance (ultimate tensile strength is up to 3%-8%) and excellent anti- It splits, shock resistance, the endurance qualities such as wear-resisting.Under load action, after cement matrix cracking, the fiber at crack will continue to bear to draw Stress simultaneously passes to uncracked matrix around and then generates new crack, and the crack progressing of ECC is obtained effectively Delay and disperse, greatly improve deformability, anti-crack ability, energy absorption ability and the durability of structure, is a kind of ideal Anti-seismic material.However, it is found by the inventors that in practical projects, because being limited to cost and construction conveniency, ECC is generally used only for The plastic hinge region of performance of concrete column confined, this makes performance of concrete column confined that must not affect the whole stress of pier stud without section construction Performance.Meanwhile ECC consistency is larger, there is a problem of reinforcing bar close quarters casting difficulty.
In addition, the construction speed of bridge pier column is mainly limited by template number and turnover condition when site operation.Largely Template can occupy more place resource in construction, and when winter construction, since temperature is lower, pier shaft concrete need compared with Maintenance could demould for a long time, and bridge pier column construction speed is caused to lag.Meanwhile engineering is mostly wearing detail with template, severe gas Use and demolition, installation mould repeatedly under the conditions of time can reduce the service life of template, increase project cost indirectly.
Summary of the invention
For above-mentioned the technical problems existing in the prior art, the object of the present invention is to provide a kind of combined anti-seismic pier studs And its construction method.The compound pillarwork has preferable anti-cracking ability and antidetonation energy absorption ability.
In order to solve the above technical problems, the technical solution of the present invention is as follows:
A kind of combined anti-seismic pier stud, comprising:
Pier stud pedestal provides support force for compound pier stud;
Compound pier stud, is fixed on the top of pier stud pedestal, including outsourcing sleeve and pier shaft, and pier shaft is placed on the interior of outsourcing sleeve Portion, the outsourcing sleeve are prepared by superhigh tenacity concrete;
The pier shaft successively includes first segment pier shaft, the second section pier shaft and third section pier shaft from bottom to top, wherein first segment Pier shaft and third section pier shaft are formed by superhigh tenacity concreting, and the second section pier shaft is poured by slightly expanded concrete.
Using the concrete prefabricated hollow circular-tube sleeve of superhigh tenacity, and it is wrapped in concrete-bridge pier stud periphery outside, forms one The structure type of the compound pillarwork of kind, hollow circular-tube sleeve can be ECC material integrated distribution in the outer of bridge pier column section Edge not only improves the rigidity of structure, but also can give full play to the good dispersion cracking property of ECC and antidetonation energy absorption ability.In addition, prefabricated Molding ECC outsourcing round tube sleeve can be directly used as the formwork for placing of bridge concrete pier stud, both save engineering formwork quantity, Construction efficiency is improved, and entirety can be formed with the pier shaft of pouring molding, improves the stress performance of structure.Further, since outsourcing Sleeve is without removing the interior maintenance action, it can be achieved that pier shaft concrete material in sleeve.
The first segment pier shaft and third section pier shaft of pier shaft are formed by superhigh tenacity concreting, and the two is located at pier The bottom and top of column are located at plastic hinge region position, the anti-seismic performance of pier stud can be improved.During second section pier shaft is located at Portion is poured by slightly expanded concrete, gap can occurs to avoid between outsourcing sleeve and pier shaft, to guarantee pier shaft structure Whole stress.
In some embodiments, the pier stud pedestal is performance of concrete column confined pedestal, and annular groove is reserved on pier stud pedestal, described Outsourcing sleeve is mounted in the annular groove, and the gap of setting width is reserved between outsourcing sleeve outer wall and annular groove sidewall.Ring Shape slot, which facilitates, carries out installation fixation for prefabricated profiled outsourcing sleeve, reserves between the outer wall and annular groove sidewall of outer jacket cylinder The gap of width is set, for being poured concrete, external jacket cylinder is fixed.
In some embodiments, the diameter ratio of the compound pier stud and pier shaft is 1.1-1.3.
When in the proportional region, compound pier stud both structural strength with higher, preferable dispersion cracking property and compared with Good antidetonation energy absorption ability, and there is preferable economy.
Further, uniform several pre-buried connector reinforcing bars of the surrounding of the annular groove of the pier stud pedestal, several connectors Reinforcing bar is fixedly connected with ring flange, and ring flange is sleeved on the outer wall of the outsourcing sleeve.
It is connected by connector reinforcing bar with ring flange, on the one hand can externally be reinforced jacket cylinder, it on the other hand can be right The concrete of casting is sealed, and effectively prevent that spillage occurs in concrete placement.
The ECC antidetonation pier stud without templating construction method, include the following steps:
Carry out the binding of steel mesh in antidetonation pier stud;
It is poured pier stud pedestal, and reserved annular groove;
Outsourcing sleeve is prepared using superhigh tenacity concrete;
Outsourcing sleeve is mounted on the annular groove of pier stud pedestal, is poured and is fixed using high strength and no shrinting cement grout material;
After the intensity of bearing's high strength and no shrinting cement grout material is higher than 35MPa, jacket cylinder is template in addition, is poured pier Body part:
Superhigh tenacity concreting first segment pier shaft is used first, is poured to setting height, is sprayed pouring surface One layer concrete interface glue is (since concrete density is about 2400kg/m3, ECC density is about 2000kg/m3If therefore directly existing On ECC if casting concrete, it will lead to concrete and mix indentation ECC under the effect of gravity, it is therefore desirable to spray interface Glue), after the initial set of interface glue, the second section pier shaft is poured, the second section pier shaft is poured using slightly expanded concrete, after the completion of pouring, It continues directly to pour third section pier shaft, third section pier shaft uses superhigh tenacity concreting.
Pier shaft is poured using slightly expanded concrete, gap can occurs to avoid between outsourcing sleeve and pier shaft, to protect Demonstrate,prove the whole stress of structure.
In some embodiments, the high strength and no shrinting cement grout material meets " GB/T 50448-2015 cement-based grout Material application technology specification " requirement, and the compression strength of its 1d, 3d, 28d be not less than 35MPa, 60MPa, 100Mpa.
To guarantee the fixed fastness of external jacket cylinder.
Elasticity modulus when being used as template to superhigh tenacity concrete requires and flexural strength requires;When ECC is used as mould When plate, if the flexural strength of ECC is lower, in assembly and pouring construction, it is easy to happen the cracking damage of ECC outsourcing sleeve; If the elasticity modulus of ECC is lower, pouring behind bridge pier, under non-condensing pier shaft concrete gravity effect, outside ECC Jacket cylinder easily deforms.But the elasticity modulus of ECC is not that the higher the better, and bullet mould is excessively high, influences the cracking performance of ECC.
Specific requirement is that ECC 7d flexural strength is not less than 10MPa, 7d elasticity modulus 16000-17000MPa.
The slump divergence that superhigh tenacity concrete is used as when pier shaft pours material requires, ultimate tensile stress requirement, the limit Stretching strain requirement;Since bridge pier shaft is banded with more reinforcing bar, and general ECC consistency is larger, is unfavorable for pouring for bridge pier shaft It builds, therefore proposes the requirement for being not less than 550mm to the slump divergence of ECC in this patent;When ECC is as Energy dissipating material, with The directly related performance parameter of its antidetonation energy absorption ability is ultimate tensile stress and ultimate tensile strength, therefore it is required that the ECC 28d limit Tensile stress should be 4-5MPa, 4% or more ultimate tensile strength.
In some embodiments, in the superhigh tenacity concrete, water, cement, flyash, quartz sand, water-reducing agent, thickening The mass ratio of agent and fiber is 300-450:450-700:550-850:350-550:3.5-6.5:0.40-0.75:10-40.
Further, it after first mixing cement, flyash, quartz sand and thickener, stirs evenly, it is dry to obtain mixing Material.
In this step, if directly adding water to be mixed in cement, flyash, then after mix quartz sand, thickener, then it is unfavorable It is dispersed in cement matrix in solid particle, the thickener powder few particularly with volume, particle is small, it can be by water around it Mud is wrapped up and can not be discharged, and causes mixture stirring uneven.Therefore it needs that each siccative is mixed in advance.
Further, further include that water and water-reducing agent are added into mixed dry material, stir to get cement matrix.
Further, further include fiber being added into cement matrix, and stir evenly, mixture is obtained, by mixture Outsourcing sleeve is obtained after casting, overlay film maintenance.
Further, the water-reducing agent is poly carboxylic acid series water reducer, and thickener is hydroxypropyl methyl cellulose, and fiber is PVA fiber.
Advantageous effects of the invention are as follows:
1) bridge pier shaft is designed as " superelevation by the potential site being likely to occur according to plastic hinge region when bridge pier column stress The structure type of toughness concrete+normal concrete+superhigh tenacity concrete ", improves the effective rate of utilization of material.
2) prefabricated profiled superhigh tenacity concrete outsourcing round tube sleeve can be used as bridge pier body formwork, in conjunction with corresponding nothing Modelling construction technology, which can reach, to be reduced form work engineering quantity, improves engineering efficiency, realizes the purpose conserved in pier shaft concrete.
3) superhigh tenacity concrete outsourcing sleeve can combine closely with bridge pier shaft in sleeve, and as external energy consumption layer The antidetonation energy-absorbing for participating in bridge pier, further improves the holistic resistant behavior of structure.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the assembly pre-structure schematic diagram of ECC of embodiment of the present invention outsourcing round tube sleeve;
Fig. 2 is structural schematic diagram after the prefabricated ECC round tube sleeve assembly of the embodiment of the present invention;
Structural schematic diagram when Fig. 3 is prefabricated ECC round tube sleeve supporting of the embodiment of the present invention;
Fig. 4 is combined bridge antidetonation pier stud of the embodiment of the present invention based on superhigh tenacity concrete;
Fig. 5 is the sectional view in Fig. 4 at 1-1;
Fig. 6 is the sectional view in Fig. 4 at 2-2.
Wherein, 1, outsourcing sleeve, 2, annular groove, 3, pier stud pedestal, 4, connector reinforcing bar, 5, ring flange, 6, grout groove, 7, pier Body supporting construction, the 8, second section pier shaft, 9, third section pier shaft, 10, first segment pier shaft, 11, vertical 3 grades of reinforcing bars, 12,3 grades of longitudinal direction Reinforcing bar.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As shown in Figure 1, Figure 2 and Figure 4, a kind of combined anti-seismic pier stud, comprising:
Pier stud pedestal 3 provides support force for compound pier stud;
Compound pier stud, is fixed on the top of pier stud pedestal, including outsourcing sleeve 1 and pier shaft, and pier shaft is placed on outsourcing sleeve 1 Inside, the outsourcing sleeve 1 are prepared by superhigh tenacity concrete;
The pier shaft successively includes first segment pier shaft 10, the second section pier shaft 8 and third section pier shaft 9 from bottom to top, wherein the One section pier shaft 10 and third section pier shaft 9 are formed by superhigh tenacity concreting, and the second section pier shaft 8 is poured by slightly expanded concrete It forms.
The pier stud pedestal 3 is performance of concrete column confined pedestal, and annular groove 2 is reserved on pier stud pedestal 3, and the outsourcing sleeve 1 is pacified In the annular groove 2, the gap of setting width is reserved between 2 side wall of 2 outer wall of outsourcing sleeve and annular groove, when construction, to Casting concrete in the gap is fixed for external jacket cylinder 2.
The diameter ratio of the compound pier stud and pier shaft is 1.1-1.3.
Uniform several the pre-buried connector reinforcing bars 4 of the surrounding of the annular groove 2 of the pier stud pedestal 3, several connector reinforcing bars 4 with Ring flange 5 is fixedly connected, and ring flange 5 is sleeved on the outer wall of the outsourcing sleeve 1.
Combined anti-seismic pier stud without templating construction method, include the following steps:
1) 3 part of bridge pier column normal concrete pier stud pedestal is first poured, C50 concrete is used.In pier stud pedestal 3 up and down Respectively with the longitudinal 3 grades of reinforcing bars of 2 Φ 16, as shown in Figure 6;Stirrup diameter is 6mm, spacing 150mm, as shown in Figure 4.In addition, mixed Solidifying soil pedestal needs to bind 12 vertical 3 grades of reinforcing bars of pre-buried 6 Φ, and reserves access slot and connector reinforcing bar.
2) superhigh tenacity concrete material is prepared;By in every cubic metre, water, cement, flyash, quartz sand, water-reducing agent, increasing Thick dose, the quality of fiber be respectively that the ratio of 339g, 593g, 711g, 474g, 6.52g, 0.25g, 26g weighs raw material and mixes and stirs.
Wherein, water-reducing agent uses polycarboxylic acid series high efficiency water reducing agent;Thickener uses hydroxypropyl methyl cellulose;Fiber uses Originate from the PVA fiber of Kuraray company, 40 μm of fibre diameter, standard long 12mm, tensile strength 1560MPa.
3) prefabricated superhigh tenacity concrete circular pipe sleeve cylinder;It is super using what is prepared in step 2) by round tube extrusion process High tenacity prefabricated concrete round tube sleeve, overlay film conserves 7d after molding, measures the four-point bending flexural strength of corresponding test specimen Cross section for 12.2MPa, mid-span deflection 31.11mm, elasticity modulus 16625MPa, sleeve is as shown in Figure 5.
4) it assembles:
1. superhigh tenacity concrete circular pipe sleeve cylinder prefabricated in step 3) is lifted positioning, insert it into pre- in step 1) In the access slot stayed, pier shaft supporting construction 7 can be used and be fixed, as shown in Figure 3;
2. preparing high strength and no shrinting cement grout material, " GB/T 50448-2015 cement-based grouting material application skill should be met Art specification " requirement, and the compression strength of its 1d, 3d, 28d not preferably less than 35MPa, 60MPa, 85MPa;
The TD-B1 ultra early-strength grouting material produced up to building materials Co., Ltd is opened up in embodiment using Jinan, surveys 1d intensity 52.3MPa, 3d intensity 70.2MPa, 28d intensity 91.1MPa.
3. being in the milk;Using the high strength and no shrinting cement grout material cementation of fissures prepared, and when grouting material intensity reaches 35MPa Afterwards, next procedure can be carried out;
5) ring flange is fixed;Use the fixed pre-made sleeve bottom of ring flange.
6) pier shaft concrete parts are poured;Using the superhigh tenacity concrete outsourcing round tube sleeve that assembles as template, to Interior segmentation pours three section pier shafts.First segment is bridge pier bottom superhigh tenacity concrete parts, process to be assembled to pier shaft from bottom to top It directly pours after the completion.Surface, which is poured, at it after the completion of first segment pier shaft pours sprays a layer concrete interface glue, when The second section pier shaft can be poured after colloid initial set.Second section pier shaft is poured using slightly expanded concrete, construction after the completion of directly after Continuous to pour third section pier shaft, third section pier shaft uses superhigh tenacity concreting, and the test specimen of final molding is as shown in Figure 4.
Using the modified epoxy interface glue of Beijing Wan Ji Jian Ye building materials Co., Ltd production, colloid tension in embodiment Intensity 45MPa, bending strength 57MPa, compression strength 83MPa;The expansion produced using Shandong Lu Jie building material Co., Ltd Cement surveys 3d intensity 24.0MPa, 7d intensity 35.5MPa, 28d intensity 55.0MPa.
7) horizontal low cyclic loading Experiment on Function and result
1. the compound antidetonation pier stud test specimen of superhigh tenacity concrete for conserving 28 days is placed on testing stand, pass through vertical oil Cylinder applies an xial feed, and keeps dead load;
2. applying horizontal loading in the side of superhigh tenacity concrete anti-earthquake rod structure, loaded using Bit andits control;
3. test in mainly test test specimen horizontal displacement and its corresponding load, i.e., the deformability of test specimen and carrying energy Power, and thus energy consumption of the calculation testing piece in reverse cyclic loadings;
4. superhigh tenacity concrete outsourcing sleeve surface has no that crack generates in load early period.When being loaded onto 45KN or so When, there is subtle horizontal fracture in the bottom of outer jacket cylinder first in test specimen.Continue growing load, it is seen that crack increases, density.When After the vertical reinforcement surrender of performance of concrete column confined, observing has greatly in superhigh tenacity concrete outsourcing sleeve bottom plastic hinge region Measure fine and closely woven crack.When being loaded onto 106KN or so, along a horizontal major fracture cracking destruction, test knot occur for outsourcing sleeve Beam.
5. according to test result, the yield load of superhigh tenacity concrete anti-earthquake column test specimen is 73KN, corresponding horizontal displacement For 10.35mm;Ultimate load is 110KN, and corresponding horizontal displacement is 35.71mm;Total energy consumption reaches 23259 (KNmm).This table It is bright to use superhigh tenacity concrete jacket barrel structure as external energy consumption layer and by the way that bridge pier column is designed to compound pier stud Form is conducive to the antidetonation energy absorption ability for improving performance of concrete column confined.Meanwhile under outer load action, outside superhigh tenacity concrete Jacket cylinder shows step by step, equably to generate a large amount of fine and closely woven crackles, rather than one big major fracture occurs and occur rapidly Brittle break, so that concrete pier rod structure damage tolerance with higher, the rehabilitation expense after can reducing macroseism, raising finish The durability of structure.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.

Claims (10)

1. a kind of combined anti-seismic pier stud, it is characterised in that: include:
Pier stud pedestal provides support force for compound pier stud;
Compound pier stud is fixed on the top of pier stud pedestal, including outsourcing sleeve and pier shaft, and pier shaft is placed on the inside of outsourcing sleeve, The outsourcing sleeve is prepared by superhigh tenacity concrete;
The pier shaft successively includes first segment pier shaft, the second section pier shaft and third section pier shaft from bottom to top, wherein first segment pier shaft It is formed with third section pier shaft by superhigh tenacity concreting, the second section pier shaft is poured by slightly expanded concrete.
2. combined anti-seismic pier stud according to claim 1, it is characterised in that: the pier stud pedestal is performance of concrete column confined bottom , annular groove is reserved on pier stud pedestal, the outsourcing sleeve is mounted in the annular groove, outsourcing sleeve outer wall and annular groove side The gap of setting width is reserved between wall.
3. combined anti-seismic pier stud according to claim 1, it is characterised in that: the diameter ratio of the compound pier stud and pier shaft For 1.1-1.3.
4. any combined anti-seismic pier stud of claim 1-3 without templating construction method, it is characterised in that: including as follows Step:
Carry out the binding of steel mesh in antidetonation pier stud;
It is poured pier stud pedestal, and reserved annular groove;
Outsourcing sleeve is prepared using superhigh tenacity concrete;
Outsourcing sleeve is mounted on the annular groove of pier stud pedestal, is poured and is fixed using high strength and no shrinting cement grout material;
After the intensity of bearing's high strength and no shrinting cement grout material is higher than 35MPa, jacket cylinder is template in addition, is poured pier shaft portion Point:
Superhigh tenacity concreting first segment pier shaft is used first, and after pouring setting height, pouring, one layer of surface spraying is mixed Solidifying Soil Interface glue pours the second section pier shaft, the second section pier shaft is poured using slightly expanded concrete, poured after the initial set of interface glue After the completion, it continues directly to pour third section pier shaft, third section pier shaft uses superhigh tenacity concreting.
5. no templating construction method according to claim 4, it is characterised in that: the high strength and no shrinting cement grout material Meet the requirement of " GB/T 50448-2015 cement-based grouting material application technology specification ", and the compression strength of its 1d, 3d, 28d Not less than 35MPa, 60MPa, 100Mpa.
6. no templating construction method according to claim 4, it is characterised in that: in the superhigh tenacity concrete, water, Cement, flyash, quartz sand, water-reducing agent, thickener and fiber mass ratio be 300-450:450-700:550-850: 350-550:3.5-6.5:0.40-0.75:10-40。
7. no templating construction method according to claim 6, it is characterised in that: first by cement, flyash, quartz sand After thickener mixing, stirs evenly, obtain mixed dry material.
8. no templating construction method according to claim 4, it is characterised in that: the 7d flexural strength of ECC is not less than 10MPa, 7d elasticity modulus are 16000-17000MPa, and the slump divergence of ECC is not less than 550mm, and the 28d limit drawing of ECC is answered Power is 4-5MPa, and ultimate tensile strength is 4% or more.
9. no templating construction method according to claim 8, it is characterised in that: further include that water is added into mixed dry material And water-reducing agent, stir to get cement matrix.
10. no templating construction method according to claim 8, it is characterised in that: further include being added into cement matrix Fiber, and stir evenly, mixture is obtained, mixture is obtained into outsourcing sleeve after casting, overlay film maintenance;
Further, the water-reducing agent is poly carboxylic acid series water reducer, and thickener is hydroxypropyl methyl cellulose, and fiber is PVA fine Dimension.
CN201910753901.0A 2019-08-15 2019-08-15 A kind of combined anti-seismic pier stud and its without templating construction method Pending CN110485276A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110759688A (en) * 2019-12-10 2020-02-07 滁州市富邦新型建材有限公司 Anti-seismic wear-resistant concrete
CN111873128A (en) * 2020-08-06 2020-11-03 河北首科铁路器材有限公司 Combined enhanced concrete corbel column and preparation method thereof

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