CN110128079A - A kind of weak broken stratum morning Qiang Kuaizhi gunite concrete and preparation method thereof - Google Patents

A kind of weak broken stratum morning Qiang Kuaizhi gunite concrete and preparation method thereof Download PDF

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Publication number
CN110128079A
CN110128079A CN201910510697.XA CN201910510697A CN110128079A CN 110128079 A CN110128079 A CN 110128079A CN 201910510697 A CN201910510697 A CN 201910510697A CN 110128079 A CN110128079 A CN 110128079A
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CN
China
Prior art keywords
gunite concrete
kuaizhi
qiang
morning
parts
Prior art date
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Pending
Application number
CN201910510697.XA
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Chinese (zh)
Inventor
陈馈
孙振川
赵海雷
洪开荣
宋法亮
张兵
韩伟锋
杨延栋
李宏波
王利明
翟乾智
秦银平
潘东江
卢松
王唤龙
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.)
State Key Laboratory of Shield Machine and Boring Technology
China Railway Tunnel Group Co Ltd CRTG
Original Assignee
State Key Laboratory of Shield Machine and Boring Technology
China Railway Tunnel Group Co Ltd CRTG
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Publication date
Application filed by State Key Laboratory of Shield Machine and Boring Technology, China Railway Tunnel Group Co Ltd CRTG filed Critical State Key Laboratory of Shield Machine and Boring Technology
Priority to CN201910510697.XA priority Critical patent/CN110128079A/en
Publication of CN110128079A publication Critical patent/CN110128079A/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
    • C04B28/04Portland cements
    • 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 weak broken stratum morning Qiang Kuaizhi gunite concretes and preparation method thereof, the gunite concrete is prepared by the raw material of following parts by weight: 450 parts of cement, 19 ~ 23 parts of curing agent, 160 ~ 180 parts of water, 980 ~ 1010 parts of fine aggregate, 690 ~ 760 parts of coarse aggregate, 6 ~ 11 parts of glass fibre, and the additive of the gunite concrete gross mass 10% ~ 15% is accounted for, account for the alkali-free quick-coagulant of the gunite concrete gross mass 6% ~ 10%.Morning Qiang Kuaizhi gunite concrete prepared by the present invention can reach very high intensity in a relatively short period of time, play good effect to the closing of country rock, escort for TBM quickly through fault belt.

Description

A kind of weak broken stratum morning Qiang Kuaizhi gunite concrete and preparation method thereof
Technical field
The present invention relates to quick supporting sealing technique field in weak broken stratum is crossed in TBM tunneling process, and in particular to one Kind weak broken stratum morning Qiang Kuaizhi gunite concrete and preparation method thereof.
Background technique
Open type complete-section tunnel boring machine (TBM) is quick with it, efficient.The advantages that environmentally friendly, on mountain tunnel and ground It is widely used in iron project, is compared with previous artificial drilling and blasting method, greatly enhance construction efficiency, also obtain Good application effect.But it is bad that fault belt, rich water, high-ground stress etc. can be usually encountered in TBM tunneling process Geology, especially usually can be stranded there is a situation where TBM card machine in rock crusher location.In order to avoid TBM card machine as far as possible, or The stabilization for ensuring shield rear fragmented rock body after TBM card machine rapidly is quickly sealed for fault disruption zone stratum TBM shield rear country rock Problem is closed, many researchs have been carried out.
Entitled " a kind of gunite concrete " is disclosed in CN108129095A, has one on the basis of normal concrete Fixed improvement, specifically joined basalt fibre and silicon ash, although its cleavage strength and adhesion strength improve, It is it or it is impossible to meet relatively broken and water flush region demands, and springback capacity is relatively large;It is public in CN108191354A It has opened " preparation method of gunite concrete and gunite concrete ", the invention only describes most basic gunite concrete and spray The preparation method of concrete is penetrated, although certain reference value is prepared with to gunite concrete, for fault belt The use of country rock fast and stable, effect is also not satisfactory, and specially intensity is insufficient, and setting time is longer, mentions there are also very big Between lift-off;Entitled " a kind of rapid hardening gunite concrete " is disclosed in CN107721242A, the invention passes through homemade interior maintenance Agent and accelerator, the gunite concrete initial set of preparation and final setting time and compression strength are certain compared with common gunite concrete It all improves a lot, but for fault belt danger stratum, setting time is still a little partially long.
Summary of the invention
That the technical problem to be solved in the present invention is to provide a kind of solidifications is fast, compression strength is high, sealing effect is good for breaking Layer crushed zone, the early Qiang Kuaizhi gunite concrete on weak broken stratum and preparation method thereof.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of weak broken stratum morning Qiang Kuaizhi gunite concrete is designed, is prepared by the raw material of following parts by weight: cement 450 parts, 19 ~ 23 parts of curing agent, 160 ~ 180 parts of water, 980 ~ 1010 parts of fine aggregate, 690 ~ 760 parts of coarse aggregate, glass fibre 6 ~ 11 Part, and the additive of the gunite concrete gross mass 10% ~ 15% is accounted for, account for the alkali-free speed of the gunite concrete gross mass 6% ~ 10% Solidifying agent.
Preferably, the additive is that graphene oxide and material granule diameter reach nanoscale concrete admixture Mixture.Using be fully ground, material granule diameter reaches nanoscale high performance concrete admixture, with graphene oxide It is solidifying to have the characteristics that enhancing promotees for mixing, nontoxic, and can improve the three-dimensional structure to the cement solidifies.
Preferably, the concrete admixture is one of microballon superfine powder, ultra-fine silicon ash or white carbon black;The oxidation The weight ratio of graphene and concrete admixture is 1:10~15.
Preferably, the fine aggregate is fine sand, and fineness modulus is 2.5 ~ 2.8, apparent density >=2600 kgm-3
Preferably, the coarse aggregate is meter Shi.
Preferably, the tensile strength of the glass fibre be 1200 ~ 1600MPa, length 5-15mm, diameter be 300 ~ 500μm。
Preferably, the cement is the quick-hardening cement of PO42.5R, and specific surface area is >=300m2·kg-1
Preferably, the alkali-free quick-coagulant is liquid.Using environment-protecting and non-poisonous alkali-free quick-coagulant, when in use with prepare Gunite concrete be in charge of conveying, in nozzle mixing jetting.
The invention further relates to a kind of preparation methods of above-mentioned weak broken stratum morning Qiang Kuaizhi gunite concrete, including under Column step:
(1) prepare raw material according to said ratio, be first added to the water additive according to the proportion with curing agent;
(2) cement, fine aggregate, coarse aggregate are added in step (1) resulting material, and stirred evenly;
(3) staple glass fibre is added in step (2) resulting material and is stirred evenly;
(4) alkali-free quick-coagulant and step (3) resulting mix concrete are in charge of conveying, and the mixing jetting at spray head.
The beneficial effects of the present invention are:
Present invention morning Qiang Kuaizhi gunite concrete, the fault belt encountered suitable for TBM tunneling process, weak broken Layer, setting time is short, compression strength is high, closing supporting effect is good, can make TBM shield rear country rock quick closure, it is ensured that The stabilization of shield rear fragmented rock body;And the cost of material used is low, environment friendly and pollution-free, preparation section is simple.The present invention is made Standby early Qiang Kuaizhi gunite concrete can reach very high intensity in a relatively short period of time, play to the closing of country rock good Effect escorts for TBM quickly through fault belt.
Detailed description of the invention
Fig. 1 is the electron microscope of morning Qiang Kuaizhi gunite concrete of the invention;
Fig. 2 is the XRD spectrum of morning Qiang Kuaizhi gunite concrete of the invention;
Fig. 3 is that morning Qiang Kuaizhi gunite concrete of the invention uses rear intensity test figure in different time periods.
Specific embodiment
Illustrate a specific embodiment of the invention below with reference to embodiment, but following embodiment is used only to be described in detail The present invention does not limit the scope of the invention in any way.Related equipment component is as without especially in the examples below Illustrate, is conventional equipment element;The related raw material of industry is commercially available regular industrial raw material unless otherwise instructed.
Embodiment 1: a kind of weak broken stratum morning Qiang Kuaizhi gunite concrete, by 19 ㎏ of curing agent, additive 230.5 ㎏ is added together in the water of 160 ㎏, and it is additional that additive is that graphene oxide with material granule diameter reaches nanoscale concrete The mixture of agent;It then is 300m by specific surface area2·kg-1PO42.5R quick-hardening cement, 980 ㎏ fineness modulus be 2.5 The rice stone of fine sand and 690 ㎏ are added in above-mentioned solution and 5min are sufficiently stirred;It is 1200MPa by 6 ㎏ tensile strength, length is 5mm, the staple glass fibre that diameter is 300 μm, which is added in above-mentioned solution, to be continued to be sufficiently stirred 5 minutes, then that injection obtained is mixed It is stand-by that solidifying soil is packed into closed mortar tank;Alkali-free quick-coagulant and gunite concrete are in charge of conveying, uniformly mixed at injector head Injection uses;It tries to spray in certain railway tunnel, work well.
Embodiment 2: a kind of weak broken stratum morning Qiang Kuaizhi gunite concrete, by 20 ㎏ of curing agent, 257 ㎏ of additive It is added in the water of 170 ㎏ together, additive is that graphene oxide and material granule diameter reach nanoscale concrete admixture Mixture;It then is 310m by 450 ㎏ specific surface areas2·kg-1PO42.5R quick-hardening cement, 990 ㎏ fineness modulus be The rice stone of 2.6 fine sand and 700 ㎏ are added in above-mentioned solution and 6min are sufficiently stirred;It is 1200MPa by 8 ㎏ tensile strength, it is long Degree is 6mm, and the staple glass fibre that diameter is 300 μm, which is added in above-mentioned solution, to be continued to be sufficiently stirred 6 minutes, then by spray obtained Penetrating concrete, to be packed into closed mortar tank stand-by;Alkali-free quick-coagulant and gunite concrete are in charge of conveying, it is uniform at injector head Mixing jetting uses;It tries to spray in certain railway tunnel, work well.
Embodiment 3: a kind of weak broken stratum morning Qiang Kuaizhi gunite concrete, by 22 ㎏ of curing agent, 260 ㎏ of additive It is added in the water of 180 ㎏ together, additive is that graphene oxide and material granule diameter reach nanoscale concrete admixture Mixture;It then is 320m by 450 ㎏ specific surface areas2·kg-1PO42.5R quick-hardening cement, 1000 ㎏ fineness modulus be The rice stone of 2.7 fine sand and 720 ㎏ are added in above-mentioned solution and 6min are sufficiently stirred;It is 1200MPa by 10 ㎏ tensile strength, it is long Degree is 10mm, and the staple glass fibre that diameter is 400 μm, which is added in above-mentioned solution, to be continued to be sufficiently stirred 6 minutes, then will be obtained It is stand-by that gunite concrete is packed into closed mortar tank;Alkali-free quick-coagulant and gunite concrete are in charge of conveying, it is equal at injector head Even mixing jetting uses;It tries to spray in certain railway tunnel, work well.
Embodiment 4: a kind of weak broken stratum morning Qiang Kuaizhi gunite concrete, by 23 ㎏ of curing agent, 273 ㎏ of additive It is added in the water of 180 ㎏ together, additive is that graphene oxide and material granule diameter reach nanoscale concrete admixture Mixture;It then is 300m by 450 ㎏ specific surface areas2·kg-1PO42.5R quick-hardening cement, 1010 ㎏ fineness modulus be The rice stone of 2.8 fine sand and 760 ㎏ are added in above-mentioned solution and 8min are sufficiently stirred;It is 1300MPa by 11 ㎏ tensile strength, it is long Degree is 15mm, and the staple glass fibre that diameter is 400 μm, which is added in above-mentioned solution, to be continued to be sufficiently stirred 8 minutes, then will be obtained It is stand-by that gunite concrete is packed into closed mortar tank;Alkali-free quick-coagulant and gunite concrete are in charge of conveying, it is equal at injector head Even mixing jetting uses;It tries to spray in certain railway tunnel, work well.
In the above-described embodiments, concrete admixture is one of microballon superfine powder, ultra-fine silicon ash or white carbon black;Oxidation The weight ratio of graphene and concrete admixture is 1:10~15.
The performance test results such as following table institute of weak broken stratum morning Qiang Kuaizhi gunite concrete in embodiment 1-4 Show.
The present invention is described in detail above in conjunction with embodiment, but person of ordinary skill in the field can manage Solution, without departing from the purpose of the present invention, can also change each design parameter in above-described embodiment, be formed Multiple specific embodiments are common variation range of the invention, are no longer described in detail one by one herein.

Claims (9)

1. a kind of weak broken stratum morning Qiang Kuaizhi gunite concrete, which is characterized in that prepared by the raw material of following parts by weight It forms: 450 parts of cement, 19 ~ 23 parts of curing agent, 160 ~ 180 parts of water, 980 ~ 1010 parts of fine aggregate, 690 ~ 760 parts of coarse aggregate, glass 6 ~ 11 parts of glass fiber, and account for the additive of the gunite concrete gross mass 10% ~ 15%, account for the gunite concrete gross mass 6% ~ 10% alkali-free quick-coagulant.
2. weak broken stratum morning Qiang Kuaizhi gunite concrete according to claim 1, which is characterized in that described additional Agent is the mixture that graphene oxide and material granule diameter reach nanoscale concrete admixture.
3. weak broken stratum morning Qiang Kuaizhi gunite concrete according to claim 2, which is characterized in that the coagulation Native additive is one of microballon superfine powder, ultra-fine silicon ash or white carbon black;The graphene oxide and concrete admixture Weight ratio is 1:10~15.
4. weak broken stratum morning Qiang Kuaizhi gunite concrete according to claim 1, which is characterized in that the thin bone Material is fine sand, and fineness modulus is 2.5 ~ 2.8, apparent density >=2600 kgm-3
5. weak broken stratum morning Qiang Kuaizhi gunite concrete according to claim 1, which is characterized in that the thick bone Material is meter Shi.
6. weak broken stratum morning Qiang Kuaizhi gunite concrete according to claim 1, which is characterized in that the glass The tensile strength of fiber is 1200 ~ 1600MPa, and length 5-15mm, diameter is 300 ~ 500 μm.
7. weak broken stratum morning Qiang Kuaizhi gunite concrete according to claim 1, which is characterized in that the cement For the quick-hardening cement of PO42.5R, specific surface area is >=300m2·kg-1
8. weak broken stratum morning Qiang Kuaizhi gunite concrete according to claim 1, which is characterized in that the alkali-free Accelerator is liquid.
9. a kind of preparation method of the morning Qiang Kuaizhi gunite concrete of weak broken stratum described in claim 1, which is characterized in that Include the following steps:
(1) prepare raw material according to proportion described in claim 1, be first added to the water additive according to the proportion with curing agent;
(2) cement, fine aggregate, coarse aggregate are added in step (1) resulting material, and stirred evenly;
(3) staple glass fibre is added in step (2) resulting material and is stirred evenly;
(4) alkali-free quick-coagulant and step (3) resulting mix concrete are in charge of conveying, and the mixing jetting at spray head.
CN201910510697.XA 2019-06-13 2019-06-13 A kind of weak broken stratum morning Qiang Kuaizhi gunite concrete and preparation method thereof Pending CN110128079A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110734261A (en) * 2019-10-31 2020-01-31 中建材料技术研究成都有限公司 high-toughness cement-based composite material for injection and preparation method thereof
CN111138159A (en) * 2019-12-31 2020-05-12 应东明 Mixed injection molding method for building material containing fiber reinforcement

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CN106431137A (en) * 2016-09-21 2017-02-22 太原理工大学 Grapheme concrete and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101265058A (en) * 2008-04-17 2008-09-17 中铁二局股份有限公司 Injection concrete
CN106431137A (en) * 2016-09-21 2017-02-22 太原理工大学 Grapheme concrete and preparation method thereof

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110734261A (en) * 2019-10-31 2020-01-31 中建材料技术研究成都有限公司 high-toughness cement-based composite material for injection and preparation method thereof
CN111138159A (en) * 2019-12-31 2020-05-12 应东明 Mixed injection molding method for building material containing fiber reinforcement
CN111138159B (en) * 2019-12-31 2021-11-26 北京东明电力工程有限公司 Mixed injection molding method for building material containing fiber reinforcement

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Application publication date: 20190816